clang 8.0.0

SemaDeclCXX.cpp
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1 //===------ SemaDeclCXX.cpp - Semantic Analysis for C++ Declarations ------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements semantic analysis for C++ declarations.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "clang/AST/ASTConsumer.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/ASTLambda.h"
17 #include "clang/AST/ASTMutationListener.h"
18 #include "clang/AST/CXXInheritance.h"
19 #include "clang/AST/CharUnits.h"
20 #include "clang/AST/ComparisonCategories.h"
21 #include "clang/AST/EvaluatedExprVisitor.h"
22 #include "clang/AST/ExprCXX.h"
23 #include "clang/AST/RecordLayout.h"
24 #include "clang/AST/RecursiveASTVisitor.h"
25 #include "clang/AST/StmtVisitor.h"
26 #include "clang/AST/TypeLoc.h"
27 #include "clang/AST/TypeOrdering.h"
28 #include "clang/Basic/PartialDiagnostic.h"
29 #include "clang/Basic/TargetInfo.h"
30 #include "clang/Lex/LiteralSupport.h"
31 #include "clang/Lex/Preprocessor.h"
32 #include "clang/Sema/CXXFieldCollector.h"
33 #include "clang/Sema/DeclSpec.h"
34 #include "clang/Sema/Initialization.h"
35 #include "clang/Sema/Lookup.h"
36 #include "clang/Sema/ParsedTemplate.h"
37 #include "clang/Sema/Scope.h"
38 #include "clang/Sema/ScopeInfo.h"
39 #include "clang/Sema/SemaInternal.h"
40 #include "clang/Sema/Template.h"
41 #include "llvm/ADT/STLExtras.h"
42 #include "llvm/ADT/SmallString.h"
43 #include "llvm/ADT/StringExtras.h"
44 #include <map>
45 #include <set>
46
47 using namespace clang;
48
49 //===----------------------------------------------------------------------===//
50 // CheckDefaultArgumentVisitor
51 //===----------------------------------------------------------------------===//
52
53 namespace {
54 /// CheckDefaultArgumentVisitor - C++ [dcl.fct.default] Traverses
55 /// the default argument of a parameter to determine whether it
56 /// contains any ill-formed subexpressions. For example, this will
57 /// diagnose the use of local variables or parameters within the
58 /// default argument expression.
59 class CheckDefaultArgumentVisitor
60 : public StmtVisitor<CheckDefaultArgumentVisitor, bool> {
61 Expr *DefaultArg;
62 Sema *S;
63
64 public:
65 CheckDefaultArgumentVisitor(Expr *defarg, Sema *s)
66 : DefaultArg(defarg), S(s) {}
67
68 bool VisitExpr(Expr *Node);
69 bool VisitDeclRefExpr(DeclRefExpr *DRE);
70 bool VisitCXXThisExpr(CXXThisExpr *ThisE);
71 bool VisitLambdaExpr(LambdaExpr *Lambda);
72 bool VisitPseudoObjectExpr(PseudoObjectExpr *POE);
73 };
74
75 /// VisitExpr - Visit all of the children of this expression.
76 bool CheckDefaultArgumentVisitor::VisitExpr(Expr *Node) {
77 bool IsInvalid = false;
78 for (Stmt *SubStmt : Node->children())
79 IsInvalid |= Visit(SubStmt);
80 return IsInvalid;
81 }
82
83 /// VisitDeclRefExpr - Visit a reference to a declaration, to
84 /// determine whether this declaration can be used in the default
85 /// argument expression.
86 bool CheckDefaultArgumentVisitor::VisitDeclRefExpr(DeclRefExpr *DRE) {
87 NamedDecl *Decl = DRE->getDecl();
88 if (ParmVarDecl *Param = dyn_cast<ParmVarDecl>(Decl)) {
89 // C++ [dcl.fct.default]p9
90 // Default arguments are evaluated each time the function is
91 // called. The order of evaluation of function arguments is
92 // unspecified. Consequently, parameters of a function shall not
93 // be used in default argument expressions, even if they are not
94 // evaluated. Parameters of a function declared before a default
95 // argument expression are in scope and can hide namespace and
96 // class member names.
97 return S->Diag(DRE->getBeginLoc(),
98 diag::err_param_default_argument_references_param)
99 << Param->getDeclName() << DefaultArg->getSourceRange();
100 } else if (VarDecl *VDecl = dyn_cast<VarDecl>(Decl)) {
101 // C++ [dcl.fct.default]p7
102 // Local variables shall not be used in default argument
103 // expressions.
104 if (VDecl->isLocalVarDecl())
105 return S->Diag(DRE->getBeginLoc(),
106 diag::err_param_default_argument_references_local)
107 << VDecl->getDeclName() << DefaultArg->getSourceRange();
108 }
109
110 return false;
111 }
112
113 /// VisitCXXThisExpr - Visit a C++ "this" expression.
114 bool CheckDefaultArgumentVisitor::VisitCXXThisExpr(CXXThisExpr *ThisE) {
115 // C++ [dcl.fct.default]p8:
116 // The keyword this shall not be used in a default argument of a
117 // member function.
118 return S->Diag(ThisE->getBeginLoc(),
119 diag::err_param_default_argument_references_this)
120 << ThisE->getSourceRange();
121 }
122
123 bool CheckDefaultArgumentVisitor::VisitPseudoObjectExpr(PseudoObjectExpr *POE) {
124 bool Invalid = false;
125 for (PseudoObjectExpr::semantics_iterator
126 i = POE->semantics_begin(), e = POE->semantics_end(); i != e; ++i) {
127 Expr *E = *i;
128
129 // Look through bindings.
130 if (OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(E)) {
131 E = OVE->getSourceExpr();
132 assert(E && "pseudo-object binding without source expression?");
133 }
134
135 Invalid |= Visit(E);
136 }
137 return Invalid;
138 }
139
140 bool CheckDefaultArgumentVisitor::VisitLambdaExpr(LambdaExpr *Lambda) {
141 // C++11 [expr.lambda.prim]p13:
142 // A lambda-expression appearing in a default argument shall not
143 // implicitly or explicitly capture any entity.
144 if (Lambda->capture_begin() == Lambda->capture_end())
145 return false;
146
147 return S->Diag(Lambda->getBeginLoc(), diag::err_lambda_capture_default_arg);
148 }
149 }
150
151 void
152 Sema::ImplicitExceptionSpecification::CalledDecl(SourceLocation CallLoc,
153 const CXXMethodDecl *Method) {
154 // If we have an MSAny spec already, don't bother.
155 if (!Method || ComputedEST == EST_MSAny)
156 return;
157
158 const FunctionProtoType *Proto
159 = Method->getType()->getAs<FunctionProtoType>();
160 Proto = Self->ResolveExceptionSpec(CallLoc, Proto);
161 if (!Proto)
162 return;
163
164 ExceptionSpecificationType EST = Proto->getExceptionSpecType();
165
166 // If we have a throw-all spec at this point, ignore the function.
167 if (ComputedEST == EST_None)
168 return;
169
170 if (EST == EST_None && Method->hasAttr<NoThrowAttr>())
171 EST = EST_BasicNoexcept;
172
173 switch (EST) {
174 case EST_Unparsed:
175 case EST_Uninstantiated:
176 case EST_Unevaluated:
177 llvm_unreachable("should not see unresolved exception specs here");
178
179 // If this function can throw any exceptions, make a note of that.
180 case EST_MSAny:
181 case EST_None:
182 // FIXME: Whichever we see last of MSAny and None determines our result.
183 // We should make a consistent, order-independent choice here.
184 ClearExceptions();
185 ComputedEST = EST;
186 return;
187 case EST_NoexceptFalse:
188 ClearExceptions();
189 ComputedEST = EST_None;
190 return;
191 // FIXME: If the call to this decl is using any of its default arguments, we
192 // need to search them for potentially-throwing calls.
193 // If this function has a basic noexcept, it doesn't affect the outcome.
194 case EST_BasicNoexcept:
195 case EST_NoexceptTrue:
196 return;
197 // If we're still at noexcept(true) and there's a throw() callee,
198 // change to that specification.
199 case EST_DynamicNone:
200 if (ComputedEST == EST_BasicNoexcept)
201 ComputedEST = EST_DynamicNone;
202 return;
203 case EST_DependentNoexcept:
204 llvm_unreachable(
205 "should not generate implicit declarations for dependent cases");
206 case EST_Dynamic:
207 break;
208 }
209 assert(EST == EST_Dynamic && "EST case not considered earlier.");
210 assert(ComputedEST != EST_None &&
211 "Shouldn't collect exceptions when throw-all is guaranteed.");
212 ComputedEST = EST_Dynamic;
213 // Record the exceptions in this function's exception specification.
214 for (const auto &E : Proto->exceptions())
215 if (ExceptionsSeen.insert(Self->Context.getCanonicalType(E)).second)
216 Exceptions.push_back(E);
217 }
218
219 void Sema::ImplicitExceptionSpecification::CalledExpr(Expr *E) {
220 if (!E || ComputedEST == EST_MSAny)
221 return;
222
223 // FIXME:
224 //
225 // C++0x [except.spec]p14:
226 // [An] implicit exception-specification specifies the type-id T if and
227 // only if T is allowed by the exception-specification of a function directly
228 // invoked by f's implicit definition; f shall allow all exceptions if any
229 // function it directly invokes allows all exceptions, and f shall allow no
230 // exceptions if every function it directly invokes allows no exceptions.
231 //
232 // Note in particular that if an implicit exception-specification is generated
233 // for a function containing a throw-expression, that specification can still
234 // be noexcept(true).
235 //
236 // Note also that 'directly invoked' is not defined in the standard, and there
237 // is no indication that we should only consider potentially-evaluated calls.
238 //
239 // Ultimately we should implement the intent of the standard: the exception
240 // specification should be the set of exceptions which can be thrown by the
241 // implicit definition. For now, we assume that any non-nothrow expression can
242 // throw any exception.
243
244 if (Self->canThrow(E))
245 ComputedEST = EST_None;
246 }
247
248 bool
249 Sema::SetParamDefaultArgument(ParmVarDecl *Param, Expr *Arg,
250 SourceLocation EqualLoc) {
251 if (RequireCompleteType(Param->getLocation(), Param->getType(),
252 diag::err_typecheck_decl_incomplete_type)) {
253 Param->setInvalidDecl();
254 return true;
255 }
256
257 // C++ [dcl.fct.default]p5
258 // A default argument expression is implicitly converted (clause
259 // 4) to the parameter type. The default argument expression has
260 // the same semantic constraints as the initializer expression in
261 // a declaration of a variable of the parameter type, using the
262 // copy-initialization semantics (8.5).
263 InitializedEntity Entity = InitializedEntity::InitializeParameter(Context,
264 Param);
265 InitializationKind Kind = InitializationKind::CreateCopy(Param->getLocation(),
266 EqualLoc);
267 InitializationSequence InitSeq(*this, Entity, Kind, Arg);
268 ExprResult Result = InitSeq.Perform(*this, Entity, Kind, Arg);
269 if (Result.isInvalid())
270 return true;
271 Arg = Result.getAs<Expr>();
272
273 CheckCompletedExpr(Arg, EqualLoc);
274 Arg = MaybeCreateExprWithCleanups(Arg);
275
276 // Okay: add the default argument to the parameter
277 Param->setDefaultArg(Arg);
278
279 // We have already instantiated this parameter; provide each of the
280 // instantiations with the uninstantiated default argument.
281 UnparsedDefaultArgInstantiationsMap::iterator InstPos
282 = UnparsedDefaultArgInstantiations.find(Param);
283 if (InstPos != UnparsedDefaultArgInstantiations.end()) {
284 for (unsigned I = 0, N = InstPos->second.size(); I != N; ++I)
285 InstPos->second[I]->setUninstantiatedDefaultArg(Arg);
286
287 // We're done tracking this parameter's instantiations.
288 UnparsedDefaultArgInstantiations.erase(InstPos);
289 }
290
291 return false;
292 }
293
294 /// ActOnParamDefaultArgument - Check whether the default argument
295 /// provided for a function parameter is well-formed. If so, attach it
296 /// to the parameter declaration.
297 void
298 Sema::ActOnParamDefaultArgument(Decl *param, SourceLocation EqualLoc,
299 Expr *DefaultArg) {
300 if (!param || !DefaultArg)
301 return;
302
303 ParmVarDecl *Param = cast<ParmVarDecl>(param);
304 UnparsedDefaultArgLocs.erase(Param);
305
306 // Default arguments are only permitted in C++
307 if (!getLangOpts().CPlusPlus) {
308 Diag(EqualLoc, diag::err_param_default_argument)
309 << DefaultArg->getSourceRange();
310 Param->setInvalidDecl();
311 return;
312 }
313
314 // Check for unexpanded parameter packs.
315 if (DiagnoseUnexpandedParameterPack(DefaultArg, UPPC_DefaultArgument)) {
316 Param->setInvalidDecl();
317 return;
318 }
319
320 // C++11 [dcl.fct.default]p3
321 // A default argument expression [...] shall not be specified for a
322 // parameter pack.
323 if (Param->isParameterPack()) {
324 Diag(EqualLoc, diag::err_param_default_argument_on_parameter_pack)
325 << DefaultArg->getSourceRange();
326 return;
327 }
328
329 // Check that the default argument is well-formed
330 CheckDefaultArgumentVisitor DefaultArgChecker(DefaultArg, this);
331 if (DefaultArgChecker.Visit(DefaultArg)) {
332 Param->setInvalidDecl();
333 return;
334 }
335
336 SetParamDefaultArgument(Param, DefaultArg, EqualLoc);
337 }
338
339 /// ActOnParamUnparsedDefaultArgument - We've seen a default
340 /// argument for a function parameter, but we can't parse it yet
341 /// because we're inside a class definition. Note that this default
342 /// argument will be parsed later.
343 void Sema::ActOnParamUnparsedDefaultArgument(Decl *param,
344 SourceLocation EqualLoc,
345 SourceLocation ArgLoc) {
346 if (!param)
347 return;
348
349 ParmVarDecl *Param = cast<ParmVarDecl>(param);
350 Param->setUnparsedDefaultArg();
351 UnparsedDefaultArgLocs[Param] = ArgLoc;
352 }
353
354 /// ActOnParamDefaultArgumentError - Parsing or semantic analysis of
355 /// the default argument for the parameter param failed.
356 void Sema::ActOnParamDefaultArgumentError(Decl *param,
357 SourceLocation EqualLoc) {
358 if (!param)
359 return;
360
361 ParmVarDecl *Param = cast<ParmVarDecl>(param);
362 Param->setInvalidDecl();
363 UnparsedDefaultArgLocs.erase(Param);
364 Param->setDefaultArg(new(Context)
365 OpaqueValueExpr(EqualLoc,
366 Param->getType().getNonReferenceType(),
367 VK_RValue));
368 }
369
370 /// CheckExtraCXXDefaultArguments - Check for any extra default
371 /// arguments in the declarator, which is not a function declaration
372 /// or definition and therefore is not permitted to have default
373 /// arguments. This routine should be invoked for every declarator
374 /// that is not a function declaration or definition.
375 void Sema::CheckExtraCXXDefaultArguments(Declarator &D) {
376 // C++ [dcl.fct.default]p3
377 // A default argument expression shall be specified only in the
378 // parameter-declaration-clause of a function declaration or in a
379 // template-parameter (14.1). It shall not be specified for a
380 // parameter pack. If it is specified in a
381 // parameter-declaration-clause, it shall not occur within a
382 // declarator or abstract-declarator of a parameter-declaration.
383 bool MightBeFunction = D.isFunctionDeclarationContext();
384 for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) {
385 DeclaratorChunk &chunk = D.getTypeObject(i);
386 if (chunk.Kind == DeclaratorChunk::Function) {
387 if (MightBeFunction) {
388 // This is a function declaration. It can have default arguments, but
389 // keep looking in case its return type is a function type with default
390 // arguments.
391 MightBeFunction = false;
392 continue;
393 }
394 for (unsigned argIdx = 0, e = chunk.Fun.NumParams; argIdx != e;
395 ++argIdx) {
396 ParmVarDecl *Param = cast<ParmVarDecl>(chunk.Fun.Params[argIdx].Param);
397 if (Param->hasUnparsedDefaultArg()) {
398 std::unique_ptr<CachedTokens> Toks =
399 std::move(chunk.Fun.Params[argIdx].DefaultArgTokens);
400 SourceRange SR;
401 if (Toks->size() > 1)
402 SR = SourceRange((*Toks)[1].getLocation(),
403 Toks->back().getLocation());
404 else
405 SR = UnparsedDefaultArgLocs[Param];
406 Diag(Param->getLocation(), diag::err_param_default_argument_nonfunc)
407 << SR;
408 } else if (Param->getDefaultArg()) {
409 Diag(Param->getLocation(), diag::err_param_default_argument_nonfunc)
410 << Param->getDefaultArg()->getSourceRange();
411 Param->setDefaultArg(nullptr);
412 }
413 }
414 } else if (chunk.Kind != DeclaratorChunk::Paren) {
415 MightBeFunction = false;
416 }
417 }
418 }
419
420 static bool functionDeclHasDefaultArgument(const FunctionDecl *FD) {
421 for (unsigned NumParams = FD->getNumParams(); NumParams > 0; --NumParams) {
422 const ParmVarDecl *PVD = FD->getParamDecl(NumParams-1);
423 if (!PVD->hasDefaultArg())
424 return false;
425 if (!PVD->hasInheritedDefaultArg())
426 return true;
427 }
428 return false;
429 }
430
431 /// MergeCXXFunctionDecl - Merge two declarations of the same C++
432 /// function, once we already know that they have the same
433 /// type. Subroutine of MergeFunctionDecl. Returns true if there was an
434 /// error, false otherwise.
435 bool Sema::MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old,
436 Scope *S) {
437 bool Invalid = false;
438
439 // The declaration context corresponding to the scope is the semantic
440 // parent, unless this is a local function declaration, in which case
441 // it is that surrounding function.
442 DeclContext *ScopeDC = New->isLocalExternDecl()
443 ? New->getLexicalDeclContext()
444 : New->getDeclContext();
445
446 // Find the previous declaration for the purpose of default arguments.
447 FunctionDecl *PrevForDefaultArgs = Old;
448 for (/**/; PrevForDefaultArgs;
449 // Don't bother looking back past the latest decl if this is a local
450 // extern declaration; nothing else could work.
451 PrevForDefaultArgs = New->isLocalExternDecl()
452 ? nullptr
453 : PrevForDefaultArgs->getPreviousDecl()) {
454 // Ignore hidden declarations.
455 if (!LookupResult::isVisible(*this, PrevForDefaultArgs))
456 continue;
457
458 if (S && !isDeclInScope(PrevForDefaultArgs, ScopeDC, S) &&
459 !New->isCXXClassMember()) {
460 // Ignore default arguments of old decl if they are not in
461 // the same scope and this is not an out-of-line definition of
462 // a member function.
463 continue;
464 }
465
466 if (PrevForDefaultArgs->isLocalExternDecl() != New->isLocalExternDecl()) {
467 // If only one of these is a local function declaration, then they are
468 // declared in different scopes, even though isDeclInScope may think
469 // they're in the same scope. (If both are local, the scope check is
470 // sufficient, and if neither is local, then they are in the same scope.)
471 continue;
472 }
473
474 // We found the right previous declaration.
475 break;
476 }
477
478 // C++ [dcl.fct.default]p4:
479 // For non-template functions, default arguments can be added in
480 // later declarations of a function in the same
481 // scope. Declarations in different scopes have completely
482 // distinct sets of default arguments. That is, declarations in
483 // inner scopes do not acquire default arguments from
484 // declarations in outer scopes, and vice versa. In a given
485 // function declaration, all parameters subsequent to a
486 // parameter with a default argument shall have default
487 // arguments supplied in this or previous declarations. A
488 // default argument shall not be redefined by a later
489 // declaration (not even to the same value).
490 //
491 // C++ [dcl.fct.default]p6:
492 // Except for member functions of class templates, the default arguments
493 // in a member function definition that appears outside of the class
494 // definition are added to the set of default arguments provided by the
495 // member function declaration in the class definition.
496 for (unsigned p = 0, NumParams = PrevForDefaultArgs
497 ? PrevForDefaultArgs->getNumParams()
498 : 0;
499 p < NumParams; ++p) {
500 ParmVarDecl *OldParam = PrevForDefaultArgs->getParamDecl(p);
501 ParmVarDecl *NewParam = New->getParamDecl(p);
502
503 bool OldParamHasDfl = OldParam ? OldParam->hasDefaultArg() : false;
504 bool NewParamHasDfl = NewParam->hasDefaultArg();
505
506 if (OldParamHasDfl && NewParamHasDfl) {
507 unsigned DiagDefaultParamID =
508 diag::err_param_default_argument_redefinition;
509
510 // MSVC accepts that default parameters be redefined for member functions
511 // of template class. The new default parameter's value is ignored.
512 Invalid = true;
513 if (getLangOpts().MicrosoftExt) {
514 CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(New);
515 if (MD && MD->getParent()->getDescribedClassTemplate()) {
516 // Merge the old default argument into the new parameter.
517 NewParam->setHasInheritedDefaultArg();
518 if (OldParam->hasUninstantiatedDefaultArg())
519 NewParam->setUninstantiatedDefaultArg(
520 OldParam->getUninstantiatedDefaultArg());
521 else
522 NewParam->setDefaultArg(OldParam->getInit());
523 DiagDefaultParamID = diag::ext_param_default_argument_redefinition;
524 Invalid = false;
525 }
526 }
527
528 // FIXME: If we knew where the '=' was, we could easily provide a fix-it
529 // hint here. Alternatively, we could walk the type-source information
530 // for NewParam to find the last source location in the type... but it
531 // isn't worth the effort right now. This is the kind of test case that
532 // is hard to get right:
533 // int f(int);
534 // void g(int (*fp)(int) = f);
535 // void g(int (*fp)(int) = &f);
536 Diag(NewParam->getLocation(), DiagDefaultParamID)
537 << NewParam->getDefaultArgRange();
538
539 // Look for the function declaration where the default argument was
540 // actually written, which may be a declaration prior to Old.
541 for (auto Older = PrevForDefaultArgs;
542 OldParam->hasInheritedDefaultArg(); /**/) {
543 Older = Older->getPreviousDecl();
544 OldParam = Older->getParamDecl(p);
545 }
546
547 Diag(OldParam->getLocation(), diag::note_previous_definition)
548 << OldParam->getDefaultArgRange();
549 } else if (OldParamHasDfl) {
550 // Merge the old default argument into the new parameter unless the new
551 // function is a friend declaration in a template class. In the latter
552 // case the default arguments will be inherited when the friend
553 // declaration will be instantiated.
554 if (New->getFriendObjectKind() == Decl::FOK_None ||
555 !New->getLexicalDeclContext()->isDependentContext()) {
556 // It's important to use getInit() here; getDefaultArg()
557 // strips off any top-level ExprWithCleanups.
558 NewParam->setHasInheritedDefaultArg();
559 if (OldParam->hasUnparsedDefaultArg())
560 NewParam->setUnparsedDefaultArg();
561 else if (OldParam->hasUninstantiatedDefaultArg())
562 NewParam->setUninstantiatedDefaultArg(
563 OldParam->getUninstantiatedDefaultArg());
564 else
565 NewParam->setDefaultArg(OldParam->getInit());
566 }
567 } else if (NewParamHasDfl) {
568 if (New->getDescribedFunctionTemplate()) {
569 // Paragraph 4, quoted above, only applies to non-template functions.
570 Diag(NewParam->getLocation(),
571 diag::err_param_default_argument_template_redecl)
572 << NewParam->getDefaultArgRange();
573 Diag(PrevForDefaultArgs->getLocation(),
574 diag::note_template_prev_declaration)
575 << false;
576 } else if (New->getTemplateSpecializationKind()
577 != TSK_ImplicitInstantiation &&
578 New->getTemplateSpecializationKind() != TSK_Undeclared) {
579 // C++ [temp.expr.spec]p21:
580 // Default function arguments shall not be specified in a declaration
581 // or a definition for one of the following explicit specializations:
582 // - the explicit specialization of a function template;
583 // - the explicit specialization of a member function template;
584 // - the explicit specialization of a member function of a class
585 // template where the class template specialization to which the
586 // member function specialization belongs is implicitly
587 // instantiated.
588 Diag(NewParam->getLocation(), diag::err_template_spec_default_arg)
589 << (New->getTemplateSpecializationKind() ==TSK_ExplicitSpecialization)
590 << New->getDeclName()
591 << NewParam->getDefaultArgRange();
592 } else if (New->getDeclContext()->isDependentContext()) {
593 // C++ [dcl.fct.default]p6 (DR217):
594 // Default arguments for a member function of a class template shall
595 // be specified on the initial declaration of the member function
596 // within the class template.
597 //
598 // Reading the tea leaves a bit in DR217 and its reference to DR205
599 // leads me to the conclusion that one cannot add default function
600 // arguments for an out-of-line definition of a member function of a
601 // dependent type.
602 int WhichKind = 2;
603 if (CXXRecordDecl *Record
604 = dyn_cast<CXXRecordDecl>(New->getDeclContext())) {
605 if (Record->getDescribedClassTemplate())
606 WhichKind = 0;
607 else if (isa<ClassTemplatePartialSpecializationDecl>(Record))
608 WhichKind = 1;
609 else
610 WhichKind = 2;
611 }
612
613 Diag(NewParam->getLocation(),
614 diag::err_param_default_argument_member_template_redecl)
615 << WhichKind
616 << NewParam->getDefaultArgRange();
617 }
618 }
619 }
620
621 // DR1344: If a default argument is added outside a class definition and that
622 // default argument makes the function a special member function, the program
623 // is ill-formed. This can only happen for constructors.
624 if (isa<CXXConstructorDecl>(New) &&
625 New->getMinRequiredArguments() < Old->getMinRequiredArguments()) {
626 CXXSpecialMember NewSM = getSpecialMember(cast<CXXMethodDecl>(New)),
627 OldSM = getSpecialMember(cast<CXXMethodDecl>(Old));
628 if (NewSM != OldSM) {
629 ParmVarDecl *NewParam = New->getParamDecl(New->getMinRequiredArguments());
630 assert(NewParam->hasDefaultArg());
631 Diag(NewParam->getLocation(), diag::err_default_arg_makes_ctor_special)
632 << NewParam->getDefaultArgRange() << NewSM;
633 Diag(Old->getLocation(), diag::note_previous_declaration);
634 }
635 }
636
637 const FunctionDecl *Def;
638 // C++11 [dcl.constexpr]p1: If any declaration of a function or function
639 // template has a constexpr specifier then all its declarations shall
640 // contain the constexpr specifier.
641 if (New->isConstexpr() != Old->isConstexpr()) {
642 Diag(New->getLocation(), diag::err_constexpr_redecl_mismatch)
643 << New << New->isConstexpr();
644 Diag(Old->getLocation(), diag::note_previous_declaration);
645 Invalid = true;
646 } else if (!Old->getMostRecentDecl()->isInlined() && New->isInlined() &&
647 Old->isDefined(Def) &&
648 // If a friend function is inlined but does not have 'inline'
649 // specifier, it is a definition. Do not report attribute conflict
650 // in this case, redefinition will be diagnosed later.
651 (New->isInlineSpecified() ||
652 New->getFriendObjectKind() == Decl::FOK_None)) {
653 // C++11 [dcl.fcn.spec]p4:
654 // If the definition of a function appears in a translation unit before its
655 // first declaration as inline, the program is ill-formed.
656 Diag(New->getLocation(), diag::err_inline_decl_follows_def) << New;
657 Diag(Def->getLocation(), diag::note_previous_definition);
658 Invalid = true;
659 }
660
661 // FIXME: It's not clear what should happen if multiple declarations of a
662 // deduction guide have different explicitness. For now at least we simply
663 // reject any case where the explicitness changes.
664 auto *NewGuide = dyn_cast<CXXDeductionGuideDecl>(New);
665 if (NewGuide && NewGuide->isExplicitSpecified() !=
666 cast<CXXDeductionGuideDecl>(Old)->isExplicitSpecified()) {
667 Diag(New->getLocation(), diag::err_deduction_guide_explicit_mismatch)
668 << NewGuide->isExplicitSpecified();
669 Diag(Old->getLocation(), diag::note_previous_declaration);
670 }
671
672 // C++11 [dcl.fct.default]p4: If a friend declaration specifies a default
673 // argument expression, that declaration shall be a definition and shall be
674 // the only declaration of the function or function template in the
675 // translation unit.
676 if (Old->getFriendObjectKind() == Decl::FOK_Undeclared &&
677 functionDeclHasDefaultArgument(Old)) {
678 Diag(New->getLocation(), diag::err_friend_decl_with_def_arg_redeclared);
679 Diag(Old->getLocation(), diag::note_previous_declaration);
680 Invalid = true;
681 }
682
683 return Invalid;
684 }
685
686 NamedDecl *
687 Sema::ActOnDecompositionDeclarator(Scope *S, Declarator &D,
688 MultiTemplateParamsArg TemplateParamLists) {
689 assert(D.isDecompositionDeclarator());
690 const DecompositionDeclarator &Decomp = D.getDecompositionDeclarator();
691
692 // The syntax only allows a decomposition declarator as a simple-declaration,
693 // a for-range-declaration, or a condition in Clang, but we parse it in more
694 // cases than that.
695 if (!D.mayHaveDecompositionDeclarator()) {
696 Diag(Decomp.getLSquareLoc(), diag::err_decomp_decl_context)
697 << Decomp.getSourceRange();
698 return nullptr;
699 }
700
701 if (!TemplateParamLists.empty()) {
702 // FIXME: There's no rule against this, but there are also no rules that
703 // would actually make it usable, so we reject it for now.
704 Diag(TemplateParamLists.front()->getTemplateLoc(),
705 diag::err_decomp_decl_template);
706 return nullptr;
707 }
708
709 Diag(Decomp.getLSquareLoc(),
710 !getLangOpts().CPlusPlus17
711 ? diag::ext_decomp_decl
712 : D.getContext() == DeclaratorContext::ConditionContext
713 ? diag::ext_decomp_decl_cond
714 : diag::warn_cxx14_compat_decomp_decl)
715 << Decomp.getSourceRange();
716
717 // The semantic context is always just the current context.
718 DeclContext *const DC = CurContext;
719
720 // C++1z [dcl.dcl]/8:
721 // The decl-specifier-seq shall contain only the type-specifier auto
722 // and cv-qualifiers.
723 auto &DS = D.getDeclSpec();
724 {
725 SmallVector<StringRef, 8> BadSpecifiers;
726 SmallVector<SourceLocation, 8> BadSpecifierLocs;
727 if (auto SCS = DS.getStorageClassSpec()) {
728 BadSpecifiers.push_back(DeclSpec::getSpecifierName(SCS));
729 BadSpecifierLocs.push_back(DS.getStorageClassSpecLoc());
730 }
731 if (auto TSCS = DS.getThreadStorageClassSpec()) {
732 BadSpecifiers.push_back(DeclSpec::getSpecifierName(TSCS));
733 BadSpecifierLocs.push_back(DS.getThreadStorageClassSpecLoc());
734 }
735 if (DS.isConstexprSpecified()) {
736 BadSpecifiers.push_back("constexpr");
737 BadSpecifierLocs.push_back(DS.getConstexprSpecLoc());
738 }
739 if (DS.isInlineSpecified()) {
740 BadSpecifiers.push_back("inline");
741 BadSpecifierLocs.push_back(DS.getInlineSpecLoc());
742 }
743 if (!BadSpecifiers.empty()) {
744 auto &&Err = Diag(BadSpecifierLocs.front(), diag::err_decomp_decl_spec);
745 Err << (int)BadSpecifiers.size()
746 << llvm::join(BadSpecifiers.begin(), BadSpecifiers.end(), " ");
747 // Don't add FixItHints to remove the specifiers; we do still respect
748 // them when building the underlying variable.
749 for (auto Loc : BadSpecifierLocs)
750 Err << SourceRange(Loc, Loc);
751 }
752 // We can't recover from it being declared as a typedef.
753 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef)
754 return nullptr;
755 }
756
757 TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S);
758 QualType R = TInfo->getType();
759
760 if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo,
761 UPPC_DeclarationType))
762 D.setInvalidType();
763
764 // The syntax only allows a single ref-qualifier prior to the decomposition
765 // declarator. No other declarator chunks are permitted. Also check the type
766 // specifier here.
767 if (DS.getTypeSpecType() != DeclSpec::TST_auto ||
768 D.hasGroupingParens() || D.getNumTypeObjects() > 1 ||
769 (D.getNumTypeObjects() == 1 &&
770 D.getTypeObject(0).Kind != DeclaratorChunk::Reference)) {
771 Diag(Decomp.getLSquareLoc(),
772 (D.hasGroupingParens() ||
773 (D.getNumTypeObjects() &&
774 D.getTypeObject(0).Kind == DeclaratorChunk::Paren))
775 ? diag::err_decomp_decl_parens
776 : diag::err_decomp_decl_type)
777 << R;
778
779 // In most cases, there's no actual problem with an explicitly-specified
780 // type, but a function type won't work here, and ActOnVariableDeclarator
781 // shouldn't be called for such a type.
782 if (R->isFunctionType())
783 D.setInvalidType();
784 }
785
786 // Build the BindingDecls.
787 SmallVector<BindingDecl*, 8> Bindings;
788
789 // Build the BindingDecls.
790 for (auto &B : D.getDecompositionDeclarator().bindings()) {
791 // Check for name conflicts.
792 DeclarationNameInfo NameInfo(B.Name, B.NameLoc);
793 LookupResult Previous(*this, NameInfo, LookupOrdinaryName,
794 ForVisibleRedeclaration);
795 LookupName(Previous, S,
796 /*CreateBuiltins*/DC->getRedeclContext()->isTranslationUnit());
797
798 // It's not permitted to shadow a template parameter name.
799 if (Previous.isSingleResult() &&
800 Previous.getFoundDecl()->isTemplateParameter()) {
801 DiagnoseTemplateParameterShadow(D.getIdentifierLoc(),
802 Previous.getFoundDecl());
803 Previous.clear();
804 }
805
806 bool ConsiderLinkage = DC->isFunctionOrMethod() &&
807 DS.getStorageClassSpec() == DeclSpec::SCS_extern;
808 FilterLookupForScope(Previous, DC, S, ConsiderLinkage,
809 /*AllowInlineNamespace*/false);
810 if (!Previous.empty()) {
811 auto *Old = Previous.getRepresentativeDecl();
812 Diag(B.NameLoc, diag::err_redefinition) << B.Name;
813 Diag(Old->getLocation(), diag::note_previous_definition);
814 }
815
816 auto *BD = BindingDecl::Create(Context, DC, B.NameLoc, B.Name);
817 PushOnScopeChains(BD, S, true);
818 Bindings.push_back(BD);
819 ParsingInitForAutoVars.insert(BD);
820 }
821
822 // There are no prior lookup results for the variable itself, because it
823 // is unnamed.
824 DeclarationNameInfo NameInfo((IdentifierInfo *)nullptr,
825 Decomp.getLSquareLoc());
826 LookupResult Previous(*this, NameInfo, LookupOrdinaryName,
827 ForVisibleRedeclaration);
828
829 // Build the variable that holds the non-decomposed object.
830 bool AddToScope = true;
831 NamedDecl *New =
832 ActOnVariableDeclarator(S, D, DC, TInfo, Previous,
833 MultiTemplateParamsArg(), AddToScope, Bindings);
834 if (AddToScope) {
835 S->AddDecl(New);
836 CurContext->addHiddenDecl(New);
837 }
838
839 if (isInOpenMPDeclareTargetContext())
840 checkDeclIsAllowedInOpenMPTarget(nullptr, New);
841
842 return New;
843 }
844
845 static bool checkSimpleDecomposition(
846 Sema &S, ArrayRef<BindingDecl *> Bindings, ValueDecl *Src,
847 QualType DecompType, const llvm::APSInt &NumElems, QualType ElemType,
848 llvm::function_ref<ExprResult(SourceLocation, Expr *, unsigned)> GetInit) {
849 if ((int64_t)Bindings.size() != NumElems) {
850 S.Diag(Src->getLocation(), diag::err_decomp_decl_wrong_number_bindings)
851 << DecompType << (unsigned)Bindings.size() << NumElems.toString(10)
852 << (NumElems < Bindings.size());
853 return true;
854 }
855
856 unsigned I = 0;
857 for (auto *B : Bindings) {
858 SourceLocation Loc = B->getLocation();
859 ExprResult E = S.BuildDeclRefExpr(Src, DecompType, VK_LValue, Loc);
860 if (E.isInvalid())
861 return true;
862 E = GetInit(Loc, E.get(), I++);
863 if (E.isInvalid())
864 return true;
865 B->setBinding(ElemType, E.get());
866 }
867
868 return false;
869 }
870
871 static bool checkArrayLikeDecomposition(Sema &S,
872 ArrayRef<BindingDecl *> Bindings,
873 ValueDecl *Src, QualType DecompType,
874 const llvm::APSInt &NumElems,
875 QualType ElemType) {
876 return checkSimpleDecomposition(
877 S, Bindings, Src, DecompType, NumElems, ElemType,
878 [&](SourceLocation Loc, Expr *Base, unsigned I) -> ExprResult {
879 ExprResult E = S.ActOnIntegerConstant(Loc, I);
880 if (E.isInvalid())
881 return ExprError();
882 return S.CreateBuiltinArraySubscriptExpr(Base, Loc, E.get(), Loc);
883 });
884 }
885
886 static bool checkArrayDecomposition(Sema &S, ArrayRef<BindingDecl*> Bindings,
887 ValueDecl *Src, QualType DecompType,
888 const ConstantArrayType *CAT) {
889 return checkArrayLikeDecomposition(S, Bindings, Src, DecompType,
890 llvm::APSInt(CAT->getSize()),
891 CAT->getElementType());
892 }
893
894 static bool checkVectorDecomposition(Sema &S, ArrayRef<BindingDecl*> Bindings,
895 ValueDecl *Src, QualType DecompType,
896 const VectorType *VT) {
897 return checkArrayLikeDecomposition(
898 S, Bindings, Src, DecompType, llvm::APSInt::get(VT->getNumElements()),
899 S.Context.getQualifiedType(VT->getElementType(),
900 DecompType.getQualifiers()));
901 }
902
903 static bool checkComplexDecomposition(Sema &S,
904 ArrayRef<BindingDecl *> Bindings,
905 ValueDecl *Src, QualType DecompType,
906 const ComplexType *CT) {
907 return checkSimpleDecomposition(
908 S, Bindings, Src, DecompType, llvm::APSInt::get(2),
909 S.Context.getQualifiedType(CT->getElementType(),
910 DecompType.getQualifiers()),
911 [&](SourceLocation Loc, Expr *Base, unsigned I) -> ExprResult {
912 return S.CreateBuiltinUnaryOp(Loc, I ? UO_Imag : UO_Real, Base);
913 });
914 }
915
916 static std::string printTemplateArgs(const PrintingPolicy &PrintingPolicy,
917 TemplateArgumentListInfo &Args) {
918 SmallString<128> SS;
919 llvm::raw_svector_ostream OS(SS);
920 bool First = true;
921 for (auto &Arg : Args.arguments()) {
922 if (!First)
923 OS << ", ";
924 Arg.getArgument().print(PrintingPolicy, OS);
925 First = false;
926 }
927 return OS.str();
928 }
929
930 static bool lookupStdTypeTraitMember(Sema &S, LookupResult &TraitMemberLookup,
931 SourceLocation Loc, StringRef Trait,
932 TemplateArgumentListInfo &Args,
933 unsigned DiagID) {
934 auto DiagnoseMissing = [&] {
935 if (DiagID)
936 S.Diag(Loc, DiagID) << printTemplateArgs(S.Context.getPrintingPolicy(),
937 Args);
938 return true;
939 };
940
941 // FIXME: Factor out duplication with lookupPromiseType in SemaCoroutine.
942 NamespaceDecl *Std = S.getStdNamespace();
943 if (!Std)
944 return DiagnoseMissing();
945
946 // Look up the trait itself, within namespace std. We can diagnose various
947 // problems with this lookup even if we've been asked to not diagnose a
948 // missing specialization, because this can only fail if the user has been
949 // declaring their own names in namespace std or we don't support the
950 // standard library implementation in use.
951 LookupResult Result(S, &S.PP.getIdentifierTable().get(Trait),
952 Loc, Sema::LookupOrdinaryName);
953 if (!S.LookupQualifiedName(Result, Std))
954 return DiagnoseMissing();
955 if (Result.isAmbiguous())
956 return true;
957
958 ClassTemplateDecl *TraitTD = Result.getAsSingle<ClassTemplateDecl>();
959 if (!TraitTD) {
960 Result.suppressDiagnostics();
961 NamedDecl *Found = *Result.begin();
962 S.Diag(Loc, diag::err_std_type_trait_not_class_template) << Trait;
963 S.Diag(Found->getLocation(), diag::note_declared_at);
964 return true;
965 }
966
967 // Build the template-id.
968 QualType TraitTy = S.CheckTemplateIdType(TemplateName(TraitTD), Loc, Args);
969 if (TraitTy.isNull())
970 return true;
971 if (!S.isCompleteType(Loc, TraitTy)) {
972 if (DiagID)
973 S.RequireCompleteType(
974 Loc, TraitTy, DiagID,
975 printTemplateArgs(S.Context.getPrintingPolicy(), Args));
976 return true;
977 }
978
979 CXXRecordDecl *RD = TraitTy->getAsCXXRecordDecl();
980 assert(RD && "specialization of class template is not a class?");
981
982 // Look up the member of the trait type.
983 S.LookupQualifiedName(TraitMemberLookup, RD);
984 return TraitMemberLookup.isAmbiguous();
985 }
986
987 static TemplateArgumentLoc
988 getTrivialIntegralTemplateArgument(Sema &S, SourceLocation Loc, QualType T,
989 uint64_t I) {
990 TemplateArgument Arg(S.Context, S.Context.MakeIntValue(I, T), T);
991 return S.getTrivialTemplateArgumentLoc(Arg, T, Loc);
992 }
993
994 static TemplateArgumentLoc
995 getTrivialTypeTemplateArgument(Sema &S, SourceLocation Loc, QualType T) {
996 return S.getTrivialTemplateArgumentLoc(TemplateArgument(T), QualType(), Loc);
997 }
998
999 namespace { enum class IsTupleLike { TupleLike, NotTupleLike, Error }; }
1000
1001 static IsTupleLike isTupleLike(Sema &S, SourceLocation Loc, QualType T,
1002 llvm::APSInt &Size) {
1003 EnterExpressionEvaluationContext ContextRAII(
1004 S, Sema::ExpressionEvaluationContext::ConstantEvaluated);
1005
1006 DeclarationName Value = S.PP.getIdentifierInfo("value");
1007 LookupResult R(S, Value, Loc, Sema::LookupOrdinaryName);
1008
1009 // Form template argument list for tuple_size<T>.
1010 TemplateArgumentListInfo Args(Loc, Loc);
1011 Args.addArgument(getTrivialTypeTemplateArgument(S, Loc, T));
1012
1013 // If there's no tuple_size specialization, it's not tuple-like.
1014 if (lookupStdTypeTraitMember(S, R, Loc, "tuple_size", Args, /*DiagID*/0))
1015 return IsTupleLike::NotTupleLike;
1016
1017 // If we get this far, we've committed to the tuple interpretation, but
1018 // we can still fail if there actually isn't a usable ::value.
1019
1020 struct ICEDiagnoser : Sema::VerifyICEDiagnoser {
1021 LookupResult &R;
1022 TemplateArgumentListInfo &Args;
1023 ICEDiagnoser(LookupResult &R, TemplateArgumentListInfo &Args)
1024 : R(R), Args(Args) {}
1025 void diagnoseNotICE(Sema &S, SourceLocation Loc, SourceRange SR) {
1026 S.Diag(Loc, diag::err_decomp_decl_std_tuple_size_not_constant)
1027 << printTemplateArgs(S.Context.getPrintingPolicy(), Args);
1028 }
1029 } Diagnoser(R, Args);
1030
1031 if (R.empty()) {
1032 Diagnoser.diagnoseNotICE(S, Loc, SourceRange());
1033 return IsTupleLike::Error;
1034 }
1035
1036 ExprResult E =
1037 S.BuildDeclarationNameExpr(CXXScopeSpec(), R, /*NeedsADL*/false);
1038 if (E.isInvalid())
1039 return IsTupleLike::Error;
1040
1041 E = S.VerifyIntegerConstantExpression(E.get(), &Size, Diagnoser, false);
1042 if (E.isInvalid())
1043 return IsTupleLike::Error;
1044
1045 return IsTupleLike::TupleLike;
1046 }
1047
1048 /// \return std::tuple_element<I, T>::type.
1049 static QualType getTupleLikeElementType(Sema &S, SourceLocation Loc,
1050 unsigned I, QualType T) {
1051 // Form template argument list for tuple_element<I, T>.
1052 TemplateArgumentListInfo Args(Loc, Loc);
1053 Args.addArgument(
1054 getTrivialIntegralTemplateArgument(S, Loc, S.Context.getSizeType(), I));
1055 Args.addArgument(getTrivialTypeTemplateArgument(S, Loc, T));
1056
1057 DeclarationName TypeDN = S.PP.getIdentifierInfo("type");
1058 LookupResult R(S, TypeDN, Loc, Sema::LookupOrdinaryName);
1059 if (lookupStdTypeTraitMember(
1060 S, R, Loc, "tuple_element", Args,
1061 diag::err_decomp_decl_std_tuple_element_not_specialized))
1062 return QualType();
1063
1064 auto *TD = R.getAsSingle<TypeDecl>();
1065 if (!TD) {
1066 R.suppressDiagnostics();
1067 S.Diag(Loc, diag::err_decomp_decl_std_tuple_element_not_specialized)
1068 << printTemplateArgs(S.Context.getPrintingPolicy(), Args);
1069 if (!R.empty())
1070 S.Diag(R.getRepresentativeDecl()->getLocation(), diag::note_declared_at);
1071 return QualType();
1072 }
1073
1074 return S.Context.getTypeDeclType(TD);
1075 }
1076
1077 namespace {
1078 struct BindingDiagnosticTrap {
1079 Sema &S;
1080 DiagnosticErrorTrap Trap;
1081 BindingDecl *BD;
1082
1083 BindingDiagnosticTrap(Sema &S, BindingDecl *BD)
1084 : S(S), Trap(S.Diags), BD(BD) {}
1085 ~BindingDiagnosticTrap() {
1086 if (Trap.hasErrorOccurred())
1087 S.Diag(BD->getLocation(), diag::note_in_binding_decl_init) << BD;
1088 }
1089 };
1090 }
1091
1092 static bool checkTupleLikeDecomposition(Sema &S,
1093 ArrayRef<BindingDecl *> Bindings,
1094 VarDecl *Src, QualType DecompType,
1095 const llvm::APSInt &TupleSize) {
1096 if ((int64_t)Bindings.size() != TupleSize) {
1097 S.Diag(Src->getLocation(), diag::err_decomp_decl_wrong_number_bindings)
1098 << DecompType << (unsigned)Bindings.size() << TupleSize.toString(10)
1099 << (TupleSize < Bindings.size());
1100 return true;
1101 }
1102
1103 if (Bindings.empty())
1104 return false;
1105
1106 DeclarationName GetDN = S.PP.getIdentifierInfo("get");
1107
1108 // [dcl.decomp]p3:
1109 // The unqualified-id get is looked up in the scope of E by class member
1110 // access lookup ...
1111 LookupResult MemberGet(S, GetDN, Src->getLocation(), Sema::LookupMemberName);
1112 bool UseMemberGet = false;
1113 if (S.isCompleteType(Src->getLocation(), DecompType)) {
1114 if (auto *RD = DecompType->getAsCXXRecordDecl())
1115 S.LookupQualifiedName(MemberGet, RD);
1116 if (MemberGet.isAmbiguous())
1117 return true;
1118 // ... and if that finds at least one declaration that is a function
1119 // template whose first template parameter is a non-type parameter ...
1120 for (NamedDecl *D : MemberGet) {
1121 if (FunctionTemplateDecl *FTD =
1122 dyn_cast<FunctionTemplateDecl>(D->getUnderlyingDecl())) {
1123 TemplateParameterList *TPL = FTD->getTemplateParameters();
1124 if (TPL->size() != 0 &&
1125 isa<NonTypeTemplateParmDecl>(TPL->getParam(0))) {
1126 // ... the initializer is e.get<i>().
1127 UseMemberGet = true;
1128 break;
1129 }
1130 }
1131 }
1132 S.FilterAcceptableTemplateNames(MemberGet);
1133 }
1134
1135 unsigned I = 0;
1136 for (auto *B : Bindings) {
1137 BindingDiagnosticTrap Trap(S, B);
1138 SourceLocation Loc = B->getLocation();
1139
1140 ExprResult E = S.BuildDeclRefExpr(Src, DecompType, VK_LValue, Loc);
1141 if (E.isInvalid())
1142 return true;
1143
1144 // e is an lvalue if the type of the entity is an lvalue reference and
1145 // an xvalue otherwise
1146 if (!Src->getType()->isLValueReferenceType())
1147 E = ImplicitCastExpr::Create(S.Context, E.get()->getType(), CK_NoOp,
1148 E.get(), nullptr, VK_XValue);
1149
1150 TemplateArgumentListInfo Args(Loc, Loc);
1151 Args.addArgument(
1152 getTrivialIntegralTemplateArgument(S, Loc, S.Context.getSizeType(), I));
1153
1154 if (UseMemberGet) {
1155 // if [lookup of member get] finds at least one declaration, the
1156 // initializer is e.get<i-1>().
1157 E = S.BuildMemberReferenceExpr(E.get(), DecompType, Loc, false,
1158 CXXScopeSpec(), SourceLocation(), nullptr,
1159 MemberGet, &Args, nullptr);
1160 if (E.isInvalid())
1161 return true;
1162
1163 E = S.ActOnCallExpr(nullptr, E.get(), Loc, None, Loc);
1164 } else {
1165 // Otherwise, the initializer is get<i-1>(e), where get is looked up
1166 // in the associated namespaces.
1167 Expr *Get = UnresolvedLookupExpr::Create(
1168 S.Context, nullptr, NestedNameSpecifierLoc(), SourceLocation(),
1169 DeclarationNameInfo(GetDN, Loc), /*RequiresADL*/true, &Args,
1170 UnresolvedSetIterator(), UnresolvedSetIterator());
1171
1172 Expr *Arg = E.get();
1173 E = S.ActOnCallExpr(nullptr, Get, Loc, Arg, Loc);
1174 }
1175 if (E.isInvalid())
1176 return true;
1177 Expr *Init = E.get();
1178
1179 // Given the type T designated by std::tuple_element<i - 1, E>::type,
1180 QualType T = getTupleLikeElementType(S, Loc, I, DecompType);
1181 if (T.isNull())
1182 return true;
1183
1184 // each vi is a variable of type "reference to T" initialized with the
1185 // initializer, where the reference is an lvalue reference if the
1186 // initializer is an lvalue and an rvalue reference otherwise
1187 QualType RefType =
1188 S.BuildReferenceType(T, E.get()->isLValue(), Loc, B->getDeclName());
1189 if (RefType.isNull())
1190 return true;
1191 auto *RefVD = VarDecl::Create(
1192 S.Context, Src->getDeclContext(), Loc, Loc,
1193 B->getDeclName().getAsIdentifierInfo(), RefType,
1194 S.Context.getTrivialTypeSourceInfo(T, Loc), Src->getStorageClass());
1195 RefVD->setLexicalDeclContext(Src->getLexicalDeclContext());
1196 RefVD->setTSCSpec(Src->getTSCSpec());
1197 RefVD->setImplicit();
1198 if (Src->isInlineSpecified())
1199 RefVD->setInlineSpecified();
1200 RefVD->getLexicalDeclContext()->addHiddenDecl(RefVD);
1201
1202 InitializedEntity Entity = InitializedEntity::InitializeBinding(RefVD);
1203 InitializationKind Kind = InitializationKind::CreateCopy(Loc, Loc);
1204 InitializationSequence Seq(S, Entity, Kind, Init);
1205 E = Seq.Perform(S, Entity, Kind, Init);
1206 if (E.isInvalid())
1207 return true;
1208 E = S.ActOnFinishFullExpr(E.get(), Loc, /*DiscardedValue*/ false);
1209 if (E.isInvalid())
1210 return true;
1211 RefVD->setInit(E.get());
1212 RefVD->checkInitIsICE();
1213
1214 E = S.BuildDeclarationNameExpr(CXXScopeSpec(),
1215 DeclarationNameInfo(B->getDeclName(), Loc),
1216 RefVD);
1217 if (E.isInvalid())
1218 return true;
1219
1220 B->setBinding(T, E.get());
1221 I++;
1222 }
1223
1224 return false;
1225 }
1226
1227 /// Find the base class to decompose in a built-in decomposition of a class type.
1228 /// This base class search is, unfortunately, not quite like any other that we
1229 /// perform anywhere else in C++.
1230 static DeclAccessPair findDecomposableBaseClass(Sema &S, SourceLocation Loc,
1231 const CXXRecordDecl *RD,
1232 CXXCastPath &BasePath) {
1233 auto BaseHasFields = [](const CXXBaseSpecifier *Specifier,
1234 CXXBasePath &Path) {
1235 return Specifier->getType()->getAsCXXRecordDecl()->hasDirectFields();
1236 };
1237
1238 const CXXRecordDecl *ClassWithFields = nullptr;
1239 AccessSpecifier AS = AS_public;
1240 if (RD->hasDirectFields())
1241 // [dcl.decomp]p4:
1242 // Otherwise, all of E's non-static data members shall be public direct
1243 // members of E ...
1244 ClassWithFields = RD;
1245 else {
1246 // ... or of ...
1247 CXXBasePaths Paths;
1248 Paths.setOrigin(const_cast<CXXRecordDecl*>(RD));
1249 if (!RD->lookupInBases(BaseHasFields, Paths)) {
1250 // If no classes have fields, just decompose RD itself. (This will work
1251 // if and only if zero bindings were provided.)
1252 return DeclAccessPair::make(const_cast<CXXRecordDecl*>(RD), AS_public);
1253 }
1254
1255 CXXBasePath *BestPath = nullptr;
1256 for (auto &P : Paths) {
1257 if (!BestPath)
1258 BestPath = &P;
1259 else if (!S.Context.hasSameType(P.back().Base->getType(),
1260 BestPath->back().Base->getType())) {
1261 // ... the same ...
1262 S.Diag(Loc, diag::err_decomp_decl_multiple_bases_with_members)
1263 << false << RD << BestPath->back().Base->getType()
1264 << P.back().Base->getType();
1265 return DeclAccessPair();
1266 } else if (P.Access < BestPath->Access) {
1267 BestPath = &P;
1268 }
1269 }
1270
1271 // ... unambiguous ...
1272 QualType BaseType = BestPath->back().Base->getType();
1273 if (Paths.isAmbiguous(S.Context.getCanonicalType(BaseType))) {
1274 S.Diag(Loc, diag::err_decomp_decl_ambiguous_base)
1275 << RD << BaseType << S.getAmbiguousPathsDisplayString(Paths);
1276 return DeclAccessPair();
1277 }
1278
1279 // ... [accessible, implied by other rules] base class of E.
1280 S.CheckBaseClassAccess(Loc, BaseType, S.Context.getRecordType(RD),
1281 *BestPath, diag::err_decomp_decl_inaccessible_base);
1282 AS = BestPath->Access;
1283
1284 ClassWithFields = BaseType->getAsCXXRecordDecl();
1285 S.BuildBasePathArray(Paths, BasePath);
1286 }
1287
1288 // The above search did not check whether the selected class itself has base
1289 // classes with fields, so check that now.
1290 CXXBasePaths Paths;
1291 if (ClassWithFields->lookupInBases(BaseHasFields, Paths)) {
1292 S.Diag(Loc, diag::err_decomp_decl_multiple_bases_with_members)
1293 << (ClassWithFields == RD) << RD << ClassWithFields
1294 << Paths.front().back().Base->getType();
1295 return DeclAccessPair();
1296 }
1297
1298 return DeclAccessPair::make(const_cast<CXXRecordDecl*>(ClassWithFields), AS);
1299 }
1300
1301 static bool checkMemberDecomposition(Sema &S, ArrayRef<BindingDecl*> Bindings,
1302 ValueDecl *Src, QualType DecompType,
1303 const CXXRecordDecl *OrigRD) {
1304 if (S.RequireCompleteType(Src->getLocation(), DecompType,
1305 diag::err_incomplete_type))
1306 return true;
1307
1308 CXXCastPath BasePath;
1309 DeclAccessPair BasePair =
1310 findDecomposableBaseClass(S, Src->getLocation(), OrigRD, BasePath);
1311 const CXXRecordDecl *RD = cast_or_null<CXXRecordDecl>(BasePair.getDecl());
1312 if (!RD)
1313 return true;
1314 QualType BaseType = S.Context.getQualifiedType(S.Context.getRecordType(RD),
1315 DecompType.getQualifiers());
1316
1317 auto DiagnoseBadNumberOfBindings = [&]() -> bool {
1318 unsigned NumFields =
1319 std::count_if(RD->field_begin(), RD->field_end(),
1320 [](FieldDecl *FD) { return !FD->isUnnamedBitfield(); });
1321 assert(Bindings.size() != NumFields);
1322 S.Diag(Src->getLocation(), diag::err_decomp_decl_wrong_number_bindings)
1323 << DecompType << (unsigned)Bindings.size() << NumFields
1324 << (NumFields < Bindings.size());
1325 return true;
1326 };
1327
1328 // all of E's non-static data members shall be [...] well-formed
1329 // when named as e.name in the context of the structured binding,
1330 // E shall not have an anonymous union member, ...
1331 unsigned I = 0;
1332 for (auto *FD : RD->fields()) {
1333 if (FD->isUnnamedBitfield())
1334 continue;
1335
1336 if (FD->isAnonymousStructOrUnion()) {
1337 S.Diag(Src->getLocation(), diag::err_decomp_decl_anon_union_member)
1338 << DecompType << FD->getType()->isUnionType();
1339 S.Diag(FD->getLocation(), diag::note_declared_at);
1340 return true;
1341 }
1342
1343 // We have a real field to bind.
1344 if (I >= Bindings.size())
1345 return DiagnoseBadNumberOfBindings();
1346 auto *B = Bindings[I++];
1347 SourceLocation Loc = B->getLocation();
1348
1349 // The field must be accessible in the context of the structured binding.
1350 // We already checked that the base class is accessible.
1351 // FIXME: Add 'const' to AccessedEntity's classes so we can remove the
1352 // const_cast here.
1353 S.CheckStructuredBindingMemberAccess(
1354 Loc, const_cast<CXXRecordDecl *>(OrigRD),
1355 DeclAccessPair::make(FD, CXXRecordDecl::MergeAccess(
1356 BasePair.getAccess(), FD->getAccess())));
1357
1358 // Initialize the binding to Src.FD.
1359 ExprResult E = S.BuildDeclRefExpr(Src, DecompType, VK_LValue, Loc);
1360 if (E.isInvalid())
1361 return true;
1362 E = S.ImpCastExprToType(E.get(), BaseType, CK_UncheckedDerivedToBase,
1363 VK_LValue, &BasePath);
1364 if (E.isInvalid())
1365 return true;
1366 E = S.BuildFieldReferenceExpr(E.get(), /*IsArrow*/ false, Loc,
1367 CXXScopeSpec(), FD,
1368 DeclAccessPair::make(FD, FD->getAccess()),
1369 DeclarationNameInfo(FD->getDeclName(), Loc));
1370 if (E.isInvalid())
1371 return true;
1372
1373 // If the type of the member is T, the referenced type is cv T, where cv is
1374 // the cv-qualification of the decomposition expression.
1375 //
1376 // FIXME: We resolve a defect here: if the field is mutable, we do not add
1377 // 'const' to the type of the field.
1378 Qualifiers Q = DecompType.getQualifiers();
1379 if (FD->isMutable())
1380 Q.removeConst();
1381 B->setBinding(S.BuildQualifiedType(FD->getType(), Loc, Q), E.get());
1382 }
1383
1384 if (I != Bindings.size())
1385 return DiagnoseBadNumberOfBindings();
1386
1387 return false;
1388 }
1389
1390 void Sema::CheckCompleteDecompositionDeclaration(DecompositionDecl *DD) {
1391 QualType DecompType = DD->getType();
1392
1393 // If the type of the decomposition is dependent, then so is the type of
1394 // each binding.
1395 if (DecompType->isDependentType()) {
1396 for (auto *B : DD->bindings())
1397 B->setType(Context.DependentTy);
1398 return;
1399 }
1400
1401 DecompType = DecompType.getNonReferenceType();
1402 ArrayRef<BindingDecl*> Bindings = DD->bindings();
1403
1404 // C++1z [dcl.decomp]/2:
1405 // If E is an array type [...]
1406 // As an extension, we also support decomposition of built-in complex and
1407 // vector types.
1408 if (auto *CAT = Context.getAsConstantArrayType(DecompType)) {
1409 if (checkArrayDecomposition(*this, Bindings, DD, DecompType, CAT))
1410 DD->setInvalidDecl();
1411 return;
1412 }
1413 if (auto *VT = DecompType->getAs<VectorType>()) {
1414 if (checkVectorDecomposition(*this, Bindings, DD, DecompType, VT))
1415 DD->setInvalidDecl();
1416 return;
1417 }
1418 if (auto *CT = DecompType->getAs<ComplexType>()) {
1419 if (checkComplexDecomposition(*this, Bindings, DD, DecompType, CT))
1420 DD->setInvalidDecl();
1421 return;
1422 }
1423
1424 // C++1z [dcl.decomp]/3:
1425 // if the expression std::tuple_size<E>::value is a well-formed integral
1426 // constant expression, [...]
1427 llvm::APSInt TupleSize(32);
1428 switch (isTupleLike(*this, DD->getLocation(), DecompType, TupleSize)) {
1429 case IsTupleLike::Error:
1430 DD->setInvalidDecl();
1431 return;
1432
1433 case IsTupleLike::TupleLike:
1434 if (checkTupleLikeDecomposition(*this, Bindings, DD, DecompType, TupleSize))
1435 DD->setInvalidDecl();
1436 return;
1437
1438 case IsTupleLike::NotTupleLike:
1439 break;
1440 }
1441
1442 // C++1z [dcl.dcl]/8:
1443 // [E shall be of array or non-union class type]
1444 CXXRecordDecl *RD = DecompType->getAsCXXRecordDecl();
1445 if (!RD || RD->isUnion()) {
1446 Diag(DD->getLocation(), diag::err_decomp_decl_unbindable_type)
1447 << DD << !RD << DecompType;
1448 DD->setInvalidDecl();
1449 return;
1450 }
1451
1452 // C++1z [dcl.decomp]/4:
1453 // all of E's non-static data members shall be [...] direct members of
1454 // E or of the same unambiguous public base class of E, ...
1455 if (checkMemberDecomposition(*this, Bindings, DD, DecompType, RD))
1456 DD->setInvalidDecl();
1457 }
1458
1459 /// Merge the exception specifications of two variable declarations.
1460 ///
1461 /// This is called when there's a redeclaration of a VarDecl. The function
1462 /// checks if the redeclaration might have an exception specification and
1463 /// validates compatibility and merges the specs if necessary.
1464 void Sema::MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old) {
1465 // Shortcut if exceptions are disabled.
1466 if (!getLangOpts().CXXExceptions)
1467 return;
1468
1469 assert(Context.hasSameType(New->getType(), Old->getType()) &&
1470 "Should only be called if types are otherwise the same.");
1471
1472 QualType NewType = New->getType();
1473 QualType OldType = Old->getType();
1474
1475 // We're only interested in pointers and references to functions, as well
1476 // as pointers to member functions.
1477 if (const ReferenceType *R = NewType->getAs<ReferenceType>()) {
1478 NewType = R->getPointeeType();
1479 OldType = OldType->getAs<ReferenceType>()->getPointeeType();
1480 } else if (const PointerType *P = NewType->getAs<PointerType>()) {
1481 NewType = P->getPointeeType();
1482 OldType = OldType->getAs<PointerType>()->getPointeeType();
1483 } else if (const MemberPointerType *M = NewType->getAs<MemberPointerType>()) {
1484 NewType = M->getPointeeType();
1485 OldType = OldType->getAs<MemberPointerType>()->getPointeeType();
1486 }
1487
1488 if (!NewType->isFunctionProtoType())
1489 return;
1490
1491 // There's lots of special cases for functions. For function pointers, system
1492 // libraries are hopefully not as broken so that we don't need these
1493 // workarounds.
1494 if (CheckEquivalentExceptionSpec(
1495 OldType->getAs<FunctionProtoType>(), Old->getLocation(),
1496 NewType->getAs<FunctionProtoType>(), New->getLocation())) {
1497 New->setInvalidDecl();
1498 }
1499 }
1500
1501 /// CheckCXXDefaultArguments - Verify that the default arguments for a
1502 /// function declaration are well-formed according to C++
1503 /// [dcl.fct.default].
1504 void Sema::CheckCXXDefaultArguments(FunctionDecl *FD) {
1505 unsigned NumParams = FD->getNumParams();
1506 unsigned p;
1507
1508 // Find first parameter with a default argument
1509 for (p = 0; p < NumParams; ++p) {
1510 ParmVarDecl *Param = FD->getParamDecl(p);
1511 if (Param->hasDefaultArg())
1512 break;
1513 }
1514
1515 // C++11 [dcl.fct.default]p4:
1516 // In a given function declaration, each parameter subsequent to a parameter
1517 // with a default argument shall have a default argument supplied in this or
1518 // a previous declaration or shall be a function parameter pack. A default
1519 // argument shall not be redefined by a later declaration (not even to the
1520 // same value).
1521 unsigned LastMissingDefaultArg = 0;
1522 for (; p < NumParams; ++p) {
1523 ParmVarDecl *Param = FD->getParamDecl(p);
1524 if (!Param->hasDefaultArg() && !Param->isParameterPack()) {
1525 if (Param->isInvalidDecl())
1526 /* We already complained about this parameter. */;
1527 else if (Param->getIdentifier())
1528 Diag(Param->getLocation(),
1529 diag::err_param_default_argument_missing_name)
1530 << Param->getIdentifier();
1531 else
1532 Diag(Param->getLocation(),
1533 diag::err_param_default_argument_missing);
1534
1535 LastMissingDefaultArg = p;
1536 }
1537 }
1538
1539 if (LastMissingDefaultArg > 0) {
1540 // Some default arguments were missing. Clear out all of the
1541 // default arguments up to (and including) the last missing
1542 // default argument, so that we leave the function parameters
1543 // in a semantically valid state.
1544 for (p = 0; p <= LastMissingDefaultArg; ++p) {
1545 ParmVarDecl *Param = FD->getParamDecl(p);
1546 if (Param->hasDefaultArg()) {
1547 Param->setDefaultArg(nullptr);
1548 }
1549 }
1550 }
1551 }
1552
1553 // CheckConstexprParameterTypes - Check whether a function's parameter types
1554 // are all literal types. If so, return true. If not, produce a suitable
1555 // diagnostic and return false.
1556 static bool CheckConstexprParameterTypes(Sema &SemaRef,
1557 const FunctionDecl *FD) {
1558 unsigned ArgIndex = 0;
1559 const FunctionProtoType *FT = FD->getType()->getAs<FunctionProtoType>();
1560 for (FunctionProtoType::param_type_iterator i = FT->param_type_begin(),
1561 e = FT->param_type_end();
1562 i != e; ++i, ++ArgIndex) {
1563 const ParmVarDecl *PD = FD->getParamDecl(ArgIndex);
1564 SourceLocation ParamLoc = PD->getLocation();
1565 if (!(*i)->isDependentType() &&
1566 SemaRef.RequireLiteralType(ParamLoc, *i,
1567 diag::err_constexpr_non_literal_param,
1568 ArgIndex+1, PD->getSourceRange(),
1569 isa<CXXConstructorDecl>(FD)))
1570 return false;
1571 }
1572 return true;
1573 }
1574
1575 /// Get diagnostic %select index for tag kind for
1576 /// record diagnostic message.
1577 /// WARNING: Indexes apply to particular diagnostics only!
1578 ///
1579 /// \returns diagnostic %select index.
1580 static unsigned getRecordDiagFromTagKind(TagTypeKind Tag) {
1581 switch (Tag) {
1582 case TTK_Struct: return 0;
1583 case TTK_Interface: return 1;
1584 case TTK_Class: return 2;
1585 default: llvm_unreachable("Invalid tag kind for record diagnostic!");
1586 }
1587 }
1588
1589 // CheckConstexprFunctionDecl - Check whether a function declaration satisfies
1590 // the requirements of a constexpr function definition or a constexpr
1591 // constructor definition. If so, return true. If not, produce appropriate
1592 // diagnostics and return false.
1593 //
1594 // This implements C++11 [dcl.constexpr]p3,4, as amended by DR1360.
1595 bool Sema::CheckConstexprFunctionDecl(const FunctionDecl *NewFD) {
1596 const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewFD);
1597 if (MD && MD->isInstance()) {
1598 // C++11 [dcl.constexpr]p4:
1599 // The definition of a constexpr constructor shall satisfy the following
1600 // constraints:
1601 // - the class shall not have any virtual base classes;
1602 const CXXRecordDecl *RD = MD->getParent();
1603 if (RD->getNumVBases()) {
1604 Diag(NewFD->getLocation(), diag::err_constexpr_virtual_base)
1605 << isa<CXXConstructorDecl>(NewFD)
1606 << getRecordDiagFromTagKind(RD->getTagKind()) << RD->getNumVBases();
1607 for (const auto &I : RD->vbases())
1608 Diag(I.getBeginLoc(), diag::note_constexpr_virtual_base_here)
1609 << I.getSourceRange();
1610 return false;
1611 }
1612 }
1613
1614 if (!isa<CXXConstructorDecl>(NewFD)) {
1615 // C++11 [dcl.constexpr]p3:
1616 // The definition of a constexpr function shall satisfy the following
1617 // constraints:
1618 // - it shall not be virtual;
1619 const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(NewFD);
1620 if (Method && Method->isVirtual()) {
1621 Method = Method->getCanonicalDecl();
1622 Diag(Method->getLocation(), diag::err_constexpr_virtual);
1623
1624 // If it's not obvious why this function is virtual, find an overridden
1625 // function which uses the 'virtual' keyword.
1626 const CXXMethodDecl *WrittenVirtual = Method;
1627 while (!WrittenVirtual->isVirtualAsWritten())
1628 WrittenVirtual = *WrittenVirtual->begin_overridden_methods();
1629 if (WrittenVirtual != Method)
1630 Diag(WrittenVirtual->getLocation(),
1631 diag::note_overridden_virtual_function);
1632 return false;
1633 }
1634
1635 // - its return type shall be a literal type;
1636 QualType RT = NewFD->getReturnType();
1637 if (!RT->isDependentType() &&
1638 RequireLiteralType(NewFD->getLocation(), RT,
1639 diag::err_constexpr_non_literal_return))
1640 return false;
1641 }
1642
1643 // - each of its parameter types shall be a literal type;
1644 if (!CheckConstexprParameterTypes(*this, NewFD))
1645 return false;
1646
1647 return true;
1648 }
1649
1650 /// Check the given declaration statement is legal within a constexpr function
1651 /// body. C++11 [dcl.constexpr]p3,p4, and C++1y [dcl.constexpr]p3.
1652 ///
1653 /// \return true if the body is OK (maybe only as an extension), false if we
1654 /// have diagnosed a problem.
1655 static bool CheckConstexprDeclStmt(Sema &SemaRef, const FunctionDecl *Dcl,
1656 DeclStmt *DS, SourceLocation &Cxx1yLoc) {
1657 // C++11 [dcl.constexpr]p3 and p4:
1658 // The definition of a constexpr function(p3) or constructor(p4) [...] shall
1659 // contain only
1660 for (const auto *DclIt : DS->decls()) {
1661 switch (DclIt->getKind()) {
1662 case Decl::StaticAssert:
1663 case Decl::Using:
1664 case Decl::UsingShadow:
1665 case Decl::UsingDirective:
1666 case Decl::UnresolvedUsingTypename:
1667 case Decl::UnresolvedUsingValue:
1668 // - static_assert-declarations
1669 // - using-declarations,
1670 // - using-directives,
1671 continue;
1672
1673 case Decl::Typedef:
1674 case Decl::TypeAlias: {
1675 // - typedef declarations and alias-declarations that do not define
1676 // classes or enumerations,
1677 const auto *TN = cast<TypedefNameDecl>(DclIt);
1678 if (TN->getUnderlyingType()->isVariablyModifiedType()) {
1679 // Don't allow variably-modified types in constexpr functions.
1680 TypeLoc TL = TN->getTypeSourceInfo()->getTypeLoc();
1681 SemaRef.Diag(TL.getBeginLoc(), diag::err_constexpr_vla)
1682 << TL.getSourceRange() << TL.getType()
1683 << isa<CXXConstructorDecl>(Dcl);
1684 return false;
1685 }
1686 continue;
1687 }
1688
1689 case Decl::Enum:
1690 case Decl::CXXRecord:
1691 // C++1y allows types to be defined, not just declared.
1692 if (cast<TagDecl>(DclIt)->isThisDeclarationADefinition())
1693 SemaRef.Diag(DS->getBeginLoc(),
1694 SemaRef.getLangOpts().CPlusPlus14
1695 ? diag::warn_cxx11_compat_constexpr_type_definition
1696 : diag::ext_constexpr_type_definition)
1697 << isa<CXXConstructorDecl>(Dcl);
1698 continue;
1699
1700 case Decl::EnumConstant:
1701 case Decl::IndirectField:
1702 case Decl::ParmVar:
1703 // These can only appear with other declarations which are banned in
1704 // C++11 and permitted in C++1y, so ignore them.
1705 continue;
1706
1707 case Decl::Var:
1708 case Decl::Decomposition: {
1709 // C++1y [dcl.constexpr]p3 allows anything except:
1710 // a definition of a variable of non-literal type or of static or
1711 // thread storage duration or for which no initialization is performed.
1712 const auto *VD = cast<VarDecl>(DclIt);
1713 if (VD->isThisDeclarationADefinition()) {
1714 if (VD->isStaticLocal()) {
1715 SemaRef.Diag(VD->getLocation(),
1716 diag::err_constexpr_local_var_static)
1717 << isa<CXXConstructorDecl>(Dcl)
1718 << (VD->getTLSKind() == VarDecl::TLS_Dynamic);
1719 return false;
1720 }
1721 if (!VD->getType()->isDependentType() &&
1722 SemaRef.RequireLiteralType(
1723 VD->getLocation(), VD->getType(),
1724 diag::err_constexpr_local_var_non_literal_type,
1725 isa<CXXConstructorDecl>(Dcl)))
1726 return false;
1727 if (!VD->getType()->isDependentType() &&
1728 !VD->hasInit() && !VD->isCXXForRangeDecl()) {
1729 SemaRef.Diag(VD->getLocation(),
1730 diag::err_constexpr_local_var_no_init)
1731 << isa<CXXConstructorDecl>(Dcl);
1732 return false;
1733 }
1734 }
1735 SemaRef.Diag(VD->getLocation(),
1736 SemaRef.getLangOpts().CPlusPlus14
1737 ? diag::warn_cxx11_compat_constexpr_local_var
1738 : diag::ext_constexpr_local_var)
1739 << isa<CXXConstructorDecl>(Dcl);
1740 continue;
1741 }
1742
1743 case Decl::NamespaceAlias:
1744 case Decl::Function:
1745 // These are disallowed in C++11 and permitted in C++1y. Allow them
1746 // everywhere as an extension.
1747 if (!Cxx1yLoc.isValid())
1748 Cxx1yLoc = DS->getBeginLoc();
1749 continue;
1750
1751 default:
1752 SemaRef.Diag(DS->getBeginLoc(), diag::err_constexpr_body_invalid_stmt)
1753 << isa<CXXConstructorDecl>(Dcl);
1754 return false;
1755 }
1756 }
1757
1758 return true;
1759 }
1760
1761 /// Check that the given field is initialized within a constexpr constructor.
1762 ///
1763 /// \param Dcl The constexpr constructor being checked.
1764 /// \param Field The field being checked. This may be a member of an anonymous
1765 /// struct or union nested within the class being checked.
1766 /// \param Inits All declarations, including anonymous struct/union members and
1767 /// indirect members, for which any initialization was provided.
1768 /// \param Diagnosed Set to true if an error is produced.
1769 static void CheckConstexprCtorInitializer(Sema &SemaRef,
1770 const FunctionDecl *Dcl,
1771 FieldDecl *Field,
1772 llvm::SmallSet<Decl*, 16> &Inits,
1773 bool &Diagnosed) {
1774 if (Field->isInvalidDecl())
1775 return;
1776
1777 if (Field->isUnnamedBitfield())
1778 return;
1779
1780 // Anonymous unions with no variant members and empty anonymous structs do not
1781 // need to be explicitly initialized. FIXME: Anonymous structs that contain no
1782 // indirect fields don't need initializing.
1783 if (Field->isAnonymousStructOrUnion() &&
1784 (Field->getType()->isUnionType()
1785 ? !Field->getType()->getAsCXXRecordDecl()->hasVariantMembers()
1786 : Field->getType()->getAsCXXRecordDecl()->isEmpty()))
1787 return;
1788
1789 if (!Inits.count(Field)) {
1790 if (!Diagnosed) {
1791 SemaRef.Diag(Dcl->getLocation(), diag::err_constexpr_ctor_missing_init);
1792 Diagnosed = true;
1793 }
1794 SemaRef.Diag(Field->getLocation(), diag::note_constexpr_ctor_missing_init);
1795 } else if (Field->isAnonymousStructOrUnion()) {
1796 const RecordDecl *RD = Field->getType()->castAs<RecordType>()->getDecl();
1797 for (auto *I : RD->fields())
1798 // If an anonymous union contains an anonymous struct of which any member
1799 // is initialized, all members must be initialized.
1800 if (!RD->isUnion() || Inits.count(I))
1801 CheckConstexprCtorInitializer(SemaRef, Dcl, I, Inits, Diagnosed);
1802 }
1803 }
1804
1805 /// Check the provided statement is allowed in a constexpr function
1806 /// definition.
1807 static bool
1808 CheckConstexprFunctionStmt(Sema &SemaRef, const FunctionDecl *Dcl, Stmt *S,
1809 SmallVectorImpl<SourceLocation> &ReturnStmts,
1810 SourceLocation &Cxx1yLoc, SourceLocation &Cxx2aLoc) {
1811 // - its function-body shall be [...] a compound-statement that contains only
1812 switch (S->getStmtClass()) {
1813 case Stmt::NullStmtClass:
1814 // - null statements,
1815 return true;
1816
1817 case Stmt::DeclStmtClass:
1818 // - static_assert-declarations
1819 // - using-declarations,
1820 // - using-directives,
1821 // - typedef declarations and alias-declarations that do not define
1822 // classes or enumerations,
1823 if (!CheckConstexprDeclStmt(SemaRef, Dcl, cast<DeclStmt>(S), Cxx1yLoc))
1824 return false;
1825 return true;
1826
1827 case Stmt::ReturnStmtClass:
1828 // - and exactly one return statement;
1829 if (isa<CXXConstructorDecl>(Dcl)) {
1830 // C++1y allows return statements in constexpr constructors.
1831 if (!Cxx1yLoc.isValid())
1832 Cxx1yLoc = S->getBeginLoc();
1833 return true;
1834 }
1835
1836 ReturnStmts.push_back(S->getBeginLoc());
1837 return true;
1838
1839 case Stmt::CompoundStmtClass: {
1840 // C++1y allows compound-statements.
1841 if (!Cxx1yLoc.isValid())
1842 Cxx1yLoc = S->getBeginLoc();
1843
1844 CompoundStmt *CompStmt = cast<CompoundStmt>(S);
1845 for (auto *BodyIt : CompStmt->body()) {
1846 if (!CheckConstexprFunctionStmt(SemaRef, Dcl, BodyIt, ReturnStmts,
1847 Cxx1yLoc, Cxx2aLoc))
1848 return false;
1849 }
1850 return true;
1851 }
1852
1853 case Stmt::AttributedStmtClass:
1854 if (!Cxx1yLoc.isValid())
1855 Cxx1yLoc = S->getBeginLoc();
1856 return true;
1857
1858 case Stmt::IfStmtClass: {
1859 // C++1y allows if-statements.
1860 if (!Cxx1yLoc.isValid())
1861 Cxx1yLoc = S->getBeginLoc();
1862
1863 IfStmt *If = cast<IfStmt>(S);
1864 if (!CheckConstexprFunctionStmt(SemaRef, Dcl, If->getThen(), ReturnStmts,
1865 Cxx1yLoc, Cxx2aLoc))
1866 return false;
1867 if (If->getElse() &&
1868 !CheckConstexprFunctionStmt(SemaRef, Dcl, If->getElse(), ReturnStmts,
1869 Cxx1yLoc, Cxx2aLoc))
1870 return false;
1871 return true;
1872 }
1873
1874 case Stmt::WhileStmtClass:
1875 case Stmt::DoStmtClass:
1876 case Stmt::ForStmtClass:
1877 case Stmt::CXXForRangeStmtClass:
1878 case Stmt::ContinueStmtClass:
1879 // C++1y allows all of these. We don't allow them as extensions in C++11,
1880 // because they don't make sense without variable mutation.
1881 if (!SemaRef.getLangOpts().CPlusPlus14)
1882 break;
1883 if (!Cxx1yLoc.isValid())
1884 Cxx1yLoc = S->getBeginLoc();
1885 for (Stmt *SubStmt : S->children())
1886 if (SubStmt &&
1887 !CheckConstexprFunctionStmt(SemaRef, Dcl, SubStmt, ReturnStmts,
1888 Cxx1yLoc, Cxx2aLoc))
1889 return false;
1890 return true;
1891
1892 case Stmt::SwitchStmtClass:
1893 case Stmt::CaseStmtClass:
1894 case Stmt::DefaultStmtClass:
1895 case Stmt::BreakStmtClass:
1896 // C++1y allows switch-statements, and since they don't need variable
1897 // mutation, we can reasonably allow them in C++11 as an extension.
1898 if (!Cxx1yLoc.isValid())
1899 Cxx1yLoc = S->getBeginLoc();
1900 for (Stmt *SubStmt : S->children())
1901 if (SubStmt &&
1902 !CheckConstexprFunctionStmt(SemaRef, Dcl, SubStmt, ReturnStmts,
1903 Cxx1yLoc, Cxx2aLoc))
1904 return false;
1905 return true;
1906
1907 case Stmt::CXXTryStmtClass:
1908 if (Cxx2aLoc.isInvalid())
1909 Cxx2aLoc = S->getBeginLoc();
1910 for (Stmt *SubStmt : S->children()) {
1911 if (SubStmt &&
1912 !CheckConstexprFunctionStmt(SemaRef, Dcl, SubStmt, ReturnStmts,
1913 Cxx1yLoc, Cxx2aLoc))
1914 return false;
1915 }
1916 return true;
1917
1918 case Stmt::CXXCatchStmtClass:
1919 // Do not bother checking the language mode (already covered by the
1920 // try block check).
1921 if (!CheckConstexprFunctionStmt(SemaRef, Dcl,
1922 cast<CXXCatchStmt>(S)->getHandlerBlock(),
1923 ReturnStmts, Cxx1yLoc, Cxx2aLoc))
1924 return false;
1925 return true;
1926
1927 default:
1928 if (!isa<Expr>(S))
1929 break;
1930
1931 // C++1y allows expression-statements.
1932 if (!Cxx1yLoc.isValid())
1933 Cxx1yLoc = S->getBeginLoc();
1934 return true;
1935 }
1936
1937 SemaRef.Diag(S->getBeginLoc(), diag::err_constexpr_body_invalid_stmt)
1938 << isa<CXXConstructorDecl>(Dcl);
1939 return false;
1940 }
1941
1942 /// Check the body for the given constexpr function declaration only contains
1943 /// the permitted types of statement. C++11 [dcl.constexpr]p3,p4.
1944 ///
1945 /// \return true if the body is OK, false if we have diagnosed a problem.
1946 bool Sema::CheckConstexprFunctionBody(const FunctionDecl *Dcl, Stmt *Body) {
1947 SmallVector<SourceLocation, 4> ReturnStmts;
1948
1949 if (isa<CXXTryStmt>(Body)) {
1950 // C++11 [dcl.constexpr]p3:
1951 // The definition of a constexpr function shall satisfy the following
1952 // constraints: [...]
1953 // - its function-body shall be = delete, = default, or a
1954 // compound-statement
1955 //
1956 // C++11 [dcl.constexpr]p4:
1957 // In the definition of a constexpr constructor, [...]
1958 // - its function-body shall not be a function-try-block;
1959 //
1960 // This restriction is lifted in C++2a, as long as inner statements also
1961 // apply the general constexpr rules.
1962 Diag(Body->getBeginLoc(),
1963 !getLangOpts().CPlusPlus2a
1964 ? diag::ext_constexpr_function_try_block_cxx2a
1965 : diag::warn_cxx17_compat_constexpr_function_try_block)
1966 << isa<CXXConstructorDecl>(Dcl);
1967 }
1968
1969 // - its function-body shall be [...] a compound-statement that contains only
1970 // [... list of cases ...]
1971 //
1972 // Note that walking the children here is enough to properly check for
1973 // CompoundStmt and CXXTryStmt body.
1974 SourceLocation Cxx1yLoc, Cxx2aLoc;
1975 for (Stmt *SubStmt : Body->children()) {
1976 if (SubStmt &&
1977 !CheckConstexprFunctionStmt(*this, Dcl, SubStmt, ReturnStmts,
1978 Cxx1yLoc, Cxx2aLoc))
1979 return false;
1980 }
1981
1982 if (Cxx2aLoc.isValid())
1983 Diag(Cxx2aLoc,
1984 getLangOpts().CPlusPlus2a
1985 ? diag::warn_cxx17_compat_constexpr_body_invalid_stmt
1986 : diag::ext_constexpr_body_invalid_stmt_cxx2a)
1987 << isa<CXXConstructorDecl>(Dcl);
1988 if (Cxx1yLoc.isValid())
1989 Diag(Cxx1yLoc,
1990 getLangOpts().CPlusPlus14
1991 ? diag::warn_cxx11_compat_constexpr_body_invalid_stmt
1992 : diag::ext_constexpr_body_invalid_stmt)
1993 << isa<CXXConstructorDecl>(Dcl);
1994
1995 if (const CXXConstructorDecl *Constructor
1996 = dyn_cast<CXXConstructorDecl>(Dcl)) {
1997 const CXXRecordDecl *RD = Constructor->getParent();
1998 // DR1359:
1999 // - every non-variant non-static data member and base class sub-object
2000 // shall be initialized;
2001 // DR1460:
2002 // - if the class is a union having variant members, exactly one of them
2003 // shall be initialized;
2004 if (RD->isUnion()) {
2005 if (Constructor->getNumCtorInitializers() == 0 &&
2006 RD->hasVariantMembers()) {
2007 Diag(Dcl->getLocation(), diag::err_constexpr_union_ctor_no_init);
2008 return false;
2009 }
2010 } else if (!Constructor->isDependentContext() &&
2011 !Constructor->isDelegatingConstructor()) {
2012 assert(RD->getNumVBases() == 0 && "constexpr ctor with virtual bases");
2013
2014 // Skip detailed checking if we have enough initializers, and we would
2015 // allow at most one initializer per member.
2016 bool AnyAnonStructUnionMembers = false;
2017 unsigned Fields = 0;
2018 for (CXXRecordDecl::field_iterator I = RD->field_begin(),
2019 E = RD->field_end(); I != E; ++I, ++Fields) {
2020 if (I->isAnonymousStructOrUnion()) {
2021 AnyAnonStructUnionMembers = true;
2022 break;
2023 }
2024 }
2025 // DR1460:
2026 // - if the class is a union-like class, but is not a union, for each of
2027 // its anonymous union members having variant members, exactly one of
2028 // them shall be initialized;
2029 if (AnyAnonStructUnionMembers ||
2030 Constructor->getNumCtorInitializers() != RD->getNumBases() + Fields) {
2031 // Check initialization of non-static data members. Base classes are
2032 // always initialized so do not need to be checked. Dependent bases
2033 // might not have initializers in the member initializer list.
2034 llvm::SmallSet<Decl*, 16> Inits;
2035 for (const auto *I: Constructor->inits()) {
2036 if (FieldDecl *FD = I->getMember())
2037 Inits.insert(FD);
2038 else if (IndirectFieldDecl *ID = I->getIndirectMember())
2039 Inits.insert(ID->chain_begin(), ID->chain_end());
2040 }
2041
2042 bool Diagnosed = false;
2043 for (auto *I : RD->fields())
2044 CheckConstexprCtorInitializer(*this, Dcl, I, Inits, Diagnosed);
2045 if (Diagnosed)
2046 return false;
2047 }
2048 }
2049 } else {
2050 if (ReturnStmts.empty()) {
2051 // C++1y doesn't require constexpr functions to contain a 'return'
2052 // statement. We still do, unless the return type might be void, because
2053 // otherwise if there's no return statement, the function cannot
2054 // be used in a core constant expression.
2055 bool OK = getLangOpts().CPlusPlus14 &&
2056 (Dcl->getReturnType()->isVoidType() ||
2057 Dcl->getReturnType()->isDependentType());
2058 Diag(Dcl->getLocation(),
2059 OK ? diag::warn_cxx11_compat_constexpr_body_no_return
2060 : diag::err_constexpr_body_no_return);
2061 if (!OK)
2062 return false;
2063 } else if (ReturnStmts.size() > 1) {
2064 Diag(ReturnStmts.back(),
2065 getLangOpts().CPlusPlus14
2066 ? diag::warn_cxx11_compat_constexpr_body_multiple_return
2067 : diag::ext_constexpr_body_multiple_return);
2068 for (unsigned I = 0; I < ReturnStmts.size() - 1; ++I)
2069 Diag(ReturnStmts[I], diag::note_constexpr_body_previous_return);
2070 }
2071 }
2072
2073 // C++11 [dcl.constexpr]p5:
2074 // if no function argument values exist such that the function invocation
2075 // substitution would produce a constant expression, the program is
2076 // ill-formed; no diagnostic required.
2077 // C++11 [dcl.constexpr]p3:
2078 // - every constructor call and implicit conversion used in initializing the
2079 // return value shall be one of those allowed in a constant expression.
2080 // C++11 [dcl.constexpr]p4:
2081 // - every constructor involved in initializing non-static data members and
2082 // base class sub-objects shall be a constexpr constructor.
2083 SmallVector<PartialDiagnosticAt, 8> Diags;
2084 if (!Expr::isPotentialConstantExpr(Dcl, Diags)) {
2085 Diag(Dcl->getLocation(), diag::ext_constexpr_function_never_constant_expr)
2086 << isa<CXXConstructorDecl>(Dcl);
2087 for (size_t I = 0, N = Diags.size(); I != N; ++I)
2088 Diag(Diags[I].first, Diags[I].second);
2089 // Don't return false here: we allow this for compatibility in
2090 // system headers.
2091 }
2092
2093 return true;
2094 }
2095
2096 /// Get the class that is directly named by the current context. This is the
2097 /// class for which an unqualified-id in this scope could name a constructor
2098 /// or destructor.
2099 ///
2100 /// If the scope specifier denotes a class, this will be that class.
2101 /// If the scope specifier is empty, this will be the class whose
2102 /// member-specification we are currently within. Otherwise, there
2103 /// is no such class.
2104 CXXRecordDecl *Sema::getCurrentClass(Scope *, const CXXScopeSpec *SS) {
2105 assert(getLangOpts().CPlusPlus && "No class names in C!");
2106
2107 if (SS && SS->isInvalid())
2108 return nullptr;
2109
2110 if (SS && SS->isNotEmpty()) {
2111 DeclContext *DC = computeDeclContext(*SS, true);
2112 return dyn_cast_or_null<CXXRecordDecl>(DC);
2113 }
2114
2115 return dyn_cast_or_null<CXXRecordDecl>(CurContext);
2116 }
2117
2118 /// isCurrentClassName - Determine whether the identifier II is the
2119 /// name of the class type currently being defined. In the case of
2120 /// nested classes, this will only return true if II is the name of
2121 /// the innermost class.
2122 bool Sema::isCurrentClassName(const IdentifierInfo &II, Scope *S,
2123 const CXXScopeSpec *SS) {
2124 CXXRecordDecl *CurDecl = getCurrentClass(S, SS);
2125 return CurDecl && &II == CurDecl->getIdentifier();
2126 }
2127
2128 /// Determine whether the identifier II is a typo for the name of
2129 /// the class type currently being defined. If so, update it to the identifier
2130 /// that should have been used.
2131 bool Sema::isCurrentClassNameTypo(IdentifierInfo *&II, const CXXScopeSpec *SS) {
2132 assert(getLangOpts().CPlusPlus && "No class names in C!");
2133
2134 if (!getLangOpts().SpellChecking)
2135 return false;
2136
2137 CXXRecordDecl *CurDecl;
2138 if (SS && SS->isSet() && !SS->isInvalid()) {
2139 DeclContext *DC = computeDeclContext(*SS, true);
2140 CurDecl = dyn_cast_or_null<CXXRecordDecl>(DC);
2141 } else
2142 CurDecl = dyn_cast_or_null<CXXRecordDecl>(CurContext);
2143
2144 if (CurDecl && CurDecl->getIdentifier() && II != CurDecl->getIdentifier() &&
2145 3 * II->getName().edit_distance(CurDecl->getIdentifier()->getName())
2146 < II->getLength()) {
2147 II = CurDecl->getIdentifier();
2148 return true;
2149 }
2150
2151 return false;
2152 }
2153
2154 /// Determine whether the given class is a base class of the given
2155 /// class, including looking at dependent bases.
2156 static bool findCircularInheritance(const CXXRecordDecl *Class,
2157 const CXXRecordDecl *Current) {
2158 SmallVector<const CXXRecordDecl*, 8> Queue;
2159
2160 Class = Class->getCanonicalDecl();
2161 while (true) {
2162 for (const auto &I : Current->bases()) {
2163 CXXRecordDecl *Base = I.getType()->getAsCXXRecordDecl();
2164 if (!Base)
2165 continue;
2166
2167 Base = Base->getDefinition();
2168 if (!Base)
2169 continue;
2170
2171 if (Base->getCanonicalDecl() == Class)
2172 return true;
2173
2174 Queue.push_back(Base);
2175 }
2176
2177 if (Queue.empty())
2178 return false;
2179
2180 Current = Queue.pop_back_val();
2181 }
2182
2183 return false;
2184 }
2185
2186 /// Check the validity of a C++ base class specifier.
2187 ///
2188 /// \returns a new CXXBaseSpecifier if well-formed, emits diagnostics
2189 /// and returns NULL otherwise.
2190 CXXBaseSpecifier *
2191 Sema::CheckBaseSpecifier(CXXRecordDecl *Class,
2192 SourceRange SpecifierRange,
2193 bool Virtual, AccessSpecifier Access,
2194 TypeSourceInfo *TInfo,
2195 SourceLocation EllipsisLoc) {
2196 QualType BaseType = TInfo->getType();
2197
2198 // C++ [class.union]p1:
2199 // A union shall not have base classes.
2200 if (Class->isUnion()) {
2201 Diag(Class->getLocation(), diag::err_base_clause_on_union)
2202 << SpecifierRange;
2203 return nullptr;
2204 }
2205
2206 if (EllipsisLoc.isValid() &&
2207 !TInfo->getType()->containsUnexpandedParameterPack()) {
2208 Diag(EllipsisLoc, diag::err_pack_expansion_without_parameter_packs)
2209 << TInfo->getTypeLoc().getSourceRange();
2210 EllipsisLoc = SourceLocation();
2211 }
2212
2213 SourceLocation BaseLoc = TInfo->getTypeLoc().getBeginLoc();
2214
2215 if (BaseType->isDependentType()) {
2216 // Make sure that we don't have circular inheritance among our dependent
2217 // bases. For non-dependent bases, the check for completeness below handles
2218 // this.
2219 if (CXXRecordDecl *BaseDecl = BaseType->getAsCXXRecordDecl()) {
2220 if (BaseDecl->getCanonicalDecl() == Class->getCanonicalDecl() ||
2221 ((BaseDecl = BaseDecl->getDefinition()) &&
2222 findCircularInheritance(Class, BaseDecl))) {
2223 Diag(BaseLoc, diag::err_circular_inheritance)
2224 << BaseType << Context.getTypeDeclType(Class);
2225
2226 if (BaseDecl->getCanonicalDecl() != Class->getCanonicalDecl())
2227 Diag(BaseDecl->getLocation(), diag::note_previous_decl)
2228 << BaseType;
2229
2230 return nullptr;
2231 }
2232 }
2233
2234 return new (Context) CXXBaseSpecifier(SpecifierRange, Virtual,
2235 Class->getTagKind() == TTK_Class,
2236 Access, TInfo, EllipsisLoc);
2237 }
2238
2239 // Base specifiers must be record types.
2240 if (!BaseType->isRecordType()) {
2241 Diag(BaseLoc, diag::err_base_must_be_class) << SpecifierRange;
2242 return nullptr;
2243 }
2244
2245 // C++ [class.union]p1:
2246 // A union shall not be used as a base class.
2247 if (BaseType->isUnionType()) {
2248 Diag(BaseLoc, diag::err_union_as_base_class) << SpecifierRange;
2249 return nullptr;
2250 }
2251
2252 // For the MS ABI, propagate DLL attributes to base class templates.
2253 if (Context.getTargetInfo().getCXXABI().isMicrosoft()) {
2254 if (Attr *ClassAttr = getDLLAttr(Class)) {
2255 if (auto *BaseTemplate = dyn_cast_or_null<ClassTemplateSpecializationDecl>(
2256 BaseType->getAsCXXRecordDecl())) {
2257 propagateDLLAttrToBaseClassTemplate(Class, ClassAttr, BaseTemplate,
2258 BaseLoc);
2259 }
2260 }
2261 }
2262
2263 // C++ [class.derived]p2:
2264 // The class-name in a base-specifier shall not be an incompletely
2265 // defined class.
2266 if (RequireCompleteType(BaseLoc, BaseType,
2267 diag::err_incomplete_base_class, SpecifierRange)) {
2268 Class->setInvalidDecl();
2269 return nullptr;
2270 }
2271
2272 // If the base class is polymorphic or isn't empty, the new one is/isn't, too.
2273 RecordDecl *BaseDecl = BaseType->getAs<RecordType>()->getDecl();
2274 assert(BaseDecl && "Record type has no declaration");
2275 BaseDecl = BaseDecl->getDefinition();
2276 assert(BaseDecl && "Base type is not incomplete, but has no definition");
2277 CXXRecordDecl *CXXBaseDecl = cast<CXXRecordDecl>(BaseDecl);
2278 assert(CXXBaseDecl && "Base type is not a C++ type");
2279
2280 // Microsoft docs say:
2281 // "If a base-class has a code_seg attribute, derived classes must have the
2282 // same attribute."
2283 const auto *BaseCSA = CXXBaseDecl->getAttr<CodeSegAttr>();
2284 const auto *DerivedCSA = Class->getAttr<CodeSegAttr>();
2285 if ((DerivedCSA || BaseCSA) &&
2286 (!BaseCSA || !DerivedCSA || BaseCSA->getName() != DerivedCSA->getName())) {
2287 Diag(Class->getLocation(), diag::err_mismatched_code_seg_base);
2288 Diag(CXXBaseDecl->getLocation(), diag::note_base_class_specified_here)
2289 << CXXBaseDecl;
2290 return nullptr;
2291 }
2292
2293 // A class which contains a flexible array member is not suitable for use as a
2294 // base class:
2295 // - If the layout determines that a base comes before another base,
2296 // the flexible array member would index into the subsequent base.
2297 // - If the layout determines that base comes before the derived class,
2298 // the flexible array member would index into the derived class.
2299 if (CXXBaseDecl->hasFlexibleArrayMember()) {
2300 Diag(BaseLoc, diag::err_base_class_has_flexible_array_member)
2301 << CXXBaseDecl->getDeclName();
2302 return nullptr;
2303 }
2304
2305 // C++ [class]p3:
2306 // If a class is marked final and it appears as a base-type-specifier in
2307 // base-clause, the program is ill-formed.
2308 if (FinalAttr *FA = CXXBaseDecl->getAttr<FinalAttr>()) {
2309 Diag(BaseLoc, diag::err_class_marked_final_used_as_base)
2310 << CXXBaseDecl->getDeclName()
2311 << FA->isSpelledAsSealed();
2312 Diag(CXXBaseDecl->getLocation(), diag::note_entity_declared_at)
2313 << CXXBaseDecl->getDeclName() << FA->getRange();
2314 return nullptr;
2315 }
2316
2317 if (BaseDecl->isInvalidDecl())
2318 Class->setInvalidDecl();
2319
2320 // Create the base specifier.
2321 return new (Context) CXXBaseSpecifier(SpecifierRange, Virtual,
2322 Class->getTagKind() == TTK_Class,
2323 Access, TInfo, EllipsisLoc);
2324 }
2325
2326 /// ActOnBaseSpecifier - Parsed a base specifier. A base specifier is
2327 /// one entry in the base class list of a class specifier, for
2328 /// example:
2329 /// class foo : public bar, virtual private baz {
2330 /// 'public bar' and 'virtual private baz' are each base-specifiers.
2331 BaseResult
2332 Sema::ActOnBaseSpecifier(Decl *classdecl, SourceRange SpecifierRange,
2333 ParsedAttributes &Attributes,
2334 bool Virtual, AccessSpecifier Access,
2335 ParsedType basetype, SourceLocation BaseLoc,
2336 SourceLocation EllipsisLoc) {
2337 if (!classdecl)
2338 return true;
2339
2340 AdjustDeclIfTemplate(classdecl);
2341 CXXRecordDecl *Class = dyn_cast<CXXRecordDecl>(classdecl);
2342 if (!Class)
2343 return true;
2344
2345 // We haven't yet attached the base specifiers.
2346 Class->setIsParsingBaseSpecifiers();
2347
2348 // We do not support any C++11 attributes on base-specifiers yet.
2349 // Diagnose any attributes we see.
2350 for (const ParsedAttr &AL : Attributes) {
2351 if (AL.isInvalid() || AL.getKind() == ParsedAttr::IgnoredAttribute)
2352 continue;
2353 Diag(AL.getLoc(), AL.getKind() == ParsedAttr::UnknownAttribute
2354 ? (unsigned)diag::warn_unknown_attribute_ignored
2355 : (unsigned)diag::err_base_specifier_attribute)
2356 << AL.getName();
2357 }
2358
2359 TypeSourceInfo *TInfo = nullptr;
2360 GetTypeFromParser(basetype, &TInfo);
2361
2362 if (EllipsisLoc.isInvalid() &&
2363 DiagnoseUnexpandedParameterPack(SpecifierRange.getBegin(), TInfo,
2364 UPPC_BaseType))
2365 return true;
2366
2367 if (CXXBaseSpecifier *BaseSpec = CheckBaseSpecifier(Class, SpecifierRange,
2368 Virtual, Access, TInfo,
2369 EllipsisLoc))
2370 return BaseSpec;
2371 else
2372 Class->setInvalidDecl();
2373
2374 return true;
2375 }
2376
2377 /// Use small set to collect indirect bases. As this is only used
2378 /// locally, there's no need to abstract the small size parameter.
2379 typedef llvm::SmallPtrSet<QualType, 4> IndirectBaseSet;
2380
2381 /// Recursively add the bases of Type. Don't add Type itself.
2382 static void
2383 NoteIndirectBases(ASTContext &Context, IndirectBaseSet &Set,
2384 const QualType &Type)
2385 {
2386 // Even though the incoming type is a base, it might not be
2387 // a class -- it could be a template parm, for instance.
2388 if (auto Rec = Type->getAs<RecordType>()) {
2389 auto Decl = Rec->getAsCXXRecordDecl();
2390
2391 // Iterate over its bases.
2392 for (const auto &BaseSpec : Decl->bases()) {
2393 QualType Base = Context.getCanonicalType(BaseSpec.getType())
2394 .getUnqualifiedType();
2395 if (Set.insert(Base).second)
2396 // If we've not already seen it, recurse.
2397 NoteIndirectBases(Context, Set, Base);
2398 }
2399 }
2400 }
2401
2402 /// Performs the actual work of attaching the given base class
2403 /// specifiers to a C++ class.
2404 bool Sema::AttachBaseSpecifiers(CXXRecordDecl *Class,
2405 MutableArrayRef<CXXBaseSpecifier *> Bases) {
2406 if (Bases.empty())
2407 return false;
2408
2409 // Used to keep track of which base types we have already seen, so
2410 // that we can properly diagnose redundant direct base types. Note
2411 // that the key is always the unqualified canonical type of the base
2412 // class.
2413 std::map<QualType, CXXBaseSpecifier*, QualTypeOrdering> KnownBaseTypes;
2414
2415 // Used to track indirect bases so we can see if a direct base is
2416 // ambiguous.
2417 IndirectBaseSet IndirectBaseTypes;
2418
2419 // Copy non-redundant base specifiers into permanent storage.
2420 unsigned NumGoodBases = 0;
2421 bool Invalid = false;
2422 for (unsigned idx = 0; idx < Bases.size(); ++idx) {
2423 QualType NewBaseType
2424 = Context.getCanonicalType(Bases[idx]->getType());
2425 NewBaseType = NewBaseType.getLocalUnqualifiedType();
2426
2427 CXXBaseSpecifier *&KnownBase = KnownBaseTypes[NewBaseType];
2428 if (KnownBase) {
2429 // C++ [class.mi]p3:
2430 // A class shall not be specified as a direct base class of a
2431 // derived class more than once.
2432 Diag(Bases[idx]->getBeginLoc(), diag::err_duplicate_base_class)
2433 << KnownBase->getType() << Bases[idx]->getSourceRange();
2434
2435 // Delete the duplicate base class specifier; we're going to
2436 // overwrite its pointer later.
2437 Context.Deallocate(Bases[idx]);
2438
2439 Invalid = true;
2440 } else {
2441 // Okay, add this new base class.
2442 KnownBase = Bases[idx];
2443 Bases[NumGoodBases++] = Bases[idx];
2444
2445 // Note this base's direct & indirect bases, if there could be ambiguity.
2446 if (Bases.size() > 1)
2447 NoteIndirectBases(Context, IndirectBaseTypes, NewBaseType);
2448
2449 if (const RecordType *Record = NewBaseType->getAs<RecordType>()) {
2450 const CXXRecordDecl *RD = cast<CXXRecordDecl>(Record->getDecl());
2451 if (Class->isInterface() &&
2452 (!RD->isInterfaceLike() ||
2453 KnownBase->getAccessSpecifier() != AS_public)) {
2454 // The Microsoft extension __interface does not permit bases that
2455 // are not themselves public interfaces.
2456 Diag(KnownBase->getBeginLoc(), diag::err_invalid_base_in_interface)
2457 << getRecordDiagFromTagKind(RD->getTagKind()) << RD
2458 << RD->getSourceRange();
2459 Invalid = true;
2460 }
2461 if (RD->hasAttr<WeakAttr>())
2462 Class->addAttr(WeakAttr::CreateImplicit(Context));
2463 }
2464 }
2465 }
2466
2467 // Attach the remaining base class specifiers to the derived class.
2468 Class->setBases(Bases.data(), NumGoodBases);
2469
2470 // Check that the only base classes that are duplicate are virtual.
2471 for (unsigned idx = 0; idx < NumGoodBases; ++idx) {
2472 // Check whether this direct base is inaccessible due to ambiguity.
2473 QualType BaseType = Bases[idx]->getType();
2474
2475 // Skip all dependent types in templates being used as base specifiers.
2476 // Checks below assume that the base specifier is a CXXRecord.
2477 if (BaseType->isDependentType())
2478 continue;
2479
2480 CanQualType CanonicalBase = Context.getCanonicalType(BaseType)
2481 .getUnqualifiedType();
2482
2483 if (IndirectBaseTypes.count(CanonicalBase)) {
2484 CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true,
2485 /*DetectVirtual=*/true);
2486 bool found
2487 = Class->isDerivedFrom(CanonicalBase->getAsCXXRecordDecl(), Paths);
2488 assert(found);
2489 (void)found;
2490
2491 if (Paths.isAmbiguous(CanonicalBase))
2492 Diag(Bases[idx]->getBeginLoc(), diag::warn_inaccessible_base_class)
2493 << BaseType << getAmbiguousPathsDisplayString(Paths)
2494 << Bases[idx]->getSourceRange();
2495 else
2496 assert(Bases[idx]->isVirtual());
2497 }
2498
2499 // Delete the base class specifier, since its data has been copied
2500 // into the CXXRecordDecl.
2501 Context.Deallocate(Bases[idx]);
2502 }
2503
2504 return Invalid;
2505 }
2506
2507 /// ActOnBaseSpecifiers - Attach the given base specifiers to the
2508 /// class, after checking whether there are any duplicate base
2509 /// classes.
2510 void Sema::ActOnBaseSpecifiers(Decl *ClassDecl,
2511 MutableArrayRef<CXXBaseSpecifier *> Bases) {
2512 if (!ClassDecl || Bases.empty())
2513 return;
2514
2515 AdjustDeclIfTemplate(ClassDecl);
2516 AttachBaseSpecifiers(cast<CXXRecordDecl>(ClassDecl), Bases);
2517 }
2518
2519 /// Determine whether the type \p Derived is a C++ class that is
2520 /// derived from the type \p Base.
2521 bool Sema::IsDerivedFrom(SourceLocation Loc, QualType Derived, QualType Base) {
2522 if (!getLangOpts().CPlusPlus)
2523 return false;
2524
2525 CXXRecordDecl *DerivedRD = Derived->getAsCXXRecordDecl();
2526 if (!DerivedRD)
2527 return false;
2528
2529 CXXRecordDecl *BaseRD = Base->getAsCXXRecordDecl();
2530 if (!BaseRD)
2531 return false;
2532
2533 // If either the base or the derived type is invalid, don't try to
2534 // check whether one is derived from the other.
2535 if (BaseRD->isInvalidDecl() || DerivedRD->isInvalidDecl())
2536 return false;
2537
2538 // FIXME: In a modules build, do we need the entire path to be visible for us
2539 // to be able to use the inheritance relationship?
2540 if (!isCompleteType(Loc, Derived) && !DerivedRD->isBeingDefined())
2541 return false;
2542
2543 return DerivedRD->isDerivedFrom(BaseRD);
2544 }
2545
2546 /// Determine whether the type \p Derived is a C++ class that is
2547 /// derived from the type \p Base.
2548 bool Sema::IsDerivedFrom(SourceLocation Loc, QualType Derived, QualType Base,
2549 CXXBasePaths &Paths) {
2550 if (!getLangOpts().CPlusPlus)
2551 return false;
2552
2553 CXXRecordDecl *DerivedRD = Derived->getAsCXXRecordDecl();
2554 if (!DerivedRD)
2555 return false;
2556
2557 CXXRecordDecl *BaseRD = Base->getAsCXXRecordDecl();
2558 if (!BaseRD)
2559 return false;
2560
2561 if (!isCompleteType(Loc, Derived) && !DerivedRD->isBeingDefined())
2562 return false;
2563
2564 return DerivedRD->isDerivedFrom(BaseRD, Paths);
2565 }
2566
2567 static void BuildBasePathArray(const CXXBasePath &Path,
2568 CXXCastPath &BasePathArray) {
2569 // We first go backward and check if we have a virtual base.
2570 // FIXME: It would be better if CXXBasePath had the base specifier for
2571 // the nearest virtual base.
2572 unsigned Start = 0;
2573 for (unsigned I = Path.size(); I != 0; --I) {
2574 if (Path[I - 1].Base->isVirtual()) {
2575 Start = I - 1;
2576 break;
2577 }
2578 }
2579
2580 // Now add all bases.
2581 for (unsigned I = Start, E = Path.size(); I != E; ++I)
2582 BasePathArray.push_back(const_cast<CXXBaseSpecifier*>(Path[I].Base));
2583 }
2584
2585
2586 void Sema::BuildBasePathArray(const CXXBasePaths &Paths,
2587 CXXCastPath &BasePathArray) {
2588 assert(BasePathArray.empty() && "Base path array must be empty!");
2589 assert(Paths.isRecordingPaths() && "Must record paths!");
2590 return ::BuildBasePathArray(Paths.front(), BasePathArray);
2591 }
2592 /// CheckDerivedToBaseConversion - Check whether the Derived-to-Base
2593 /// conversion (where Derived and Base are class types) is
2594 /// well-formed, meaning that the conversion is unambiguous (and
2595 /// that all of the base classes are accessible). Returns true
2596 /// and emits a diagnostic if the code is ill-formed, returns false
2597 /// otherwise. Loc is the location where this routine should point to
2598 /// if there is an error, and Range is the source range to highlight
2599 /// if there is an error.
2600 ///
2601 /// If either InaccessibleBaseID or AmbigiousBaseConvID are 0, then the
2602 /// diagnostic for the respective type of error will be suppressed, but the
2603 /// check for ill-formed code will still be performed.
2604 bool
2605 Sema::CheckDerivedToBaseConversion(QualType Derived, QualType Base,
2606 unsigned InaccessibleBaseID,
2607 unsigned AmbigiousBaseConvID,
2608 SourceLocation Loc, SourceRange Range,
2609 DeclarationName Name,
2610 CXXCastPath *BasePath,
2611 bool IgnoreAccess) {
2612 // First, determine whether the path from Derived to Base is
2613 // ambiguous. This is slightly more expensive than checking whether
2614 // the Derived to Base conversion exists, because here we need to
2615 // explore multiple paths to determine if there is an ambiguity.
2616 CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true,
2617 /*DetectVirtual=*/false);
2618 bool DerivationOkay = IsDerivedFrom(Loc, Derived, Base, Paths);
2619 if (!DerivationOkay)
2620 return true;
2621
2622 const CXXBasePath *Path = nullptr;
2623 if (!Paths.isAmbiguous(Context.getCanonicalType(Base).getUnqualifiedType()))
2624 Path = &Paths.front();
2625
2626 // For MSVC compatibility, check if Derived directly inherits from Base. Clang
2627 // warns about this hierarchy under -Winaccessible-base, but MSVC allows the
2628 // user to access such bases.
2629 if (!Path && getLangOpts().MSVCCompat) {
2630 for (const CXXBasePath &PossiblePath : Paths) {
2631 if (PossiblePath.size() == 1) {
2632 Path = &PossiblePath;
2633 if (AmbigiousBaseConvID)
2634 Diag(Loc, diag::ext_ms_ambiguous_direct_base)
2635 << Base << Derived << Range;
2636 break;
2637 }
2638 }
2639 }
2640
2641 if (Path) {
2642 if (!IgnoreAccess) {
2643 // Check that the base class can be accessed.
2644 switch (
2645 CheckBaseClassAccess(Loc, Base, Derived, *Path, InaccessibleBaseID)) {
2646 case AR_inaccessible:
2647 return true;
2648 case AR_accessible:
2649 case AR_dependent:
2650 case AR_delayed:
2651 break;
2652 }
2653 }
2654
2655 // Build a base path if necessary.
2656 if (BasePath)
2657 ::BuildBasePathArray(*Path, *BasePath);
2658 return false;
2659 }
2660
2661 if (AmbigiousBaseConvID) {
2662 // We know that the derived-to-base conversion is ambiguous, and
2663 // we're going to produce a diagnostic. Perform the derived-to-base
2664 // search just one more time to compute all of the possible paths so
2665 // that we can print them out. This is more expensive than any of
2666 // the previous derived-to-base checks we've done, but at this point
2667 // performance isn't as much of an issue.
2668 Paths.clear();
2669 Paths.setRecordingPaths(true);
2670 bool StillOkay = IsDerivedFrom(Loc, Derived, Base, Paths);
2671 assert(StillOkay && "Can only be used with a derived-to-base conversion");
2672 (void)StillOkay;
2673
2674 // Build up a textual representation of the ambiguous paths, e.g.,
2675 // D -> B -> A, that will be used to illustrate the ambiguous
2676 // conversions in the diagnostic. We only print one of the paths
2677 // to each base class subobject.
2678 std::string PathDisplayStr = getAmbiguousPathsDisplayString(Paths);
2679
2680 Diag(Loc, AmbigiousBaseConvID)
2681 << Derived << Base << PathDisplayStr << Range << Name;
2682 }
2683 return true;
2684 }
2685
2686 bool
2687 Sema::CheckDerivedToBaseConversion(QualType Derived, QualType Base,
2688 SourceLocation Loc, SourceRange Range,
2689 CXXCastPath *BasePath,
2690 bool IgnoreAccess) {
2691 return CheckDerivedToBaseConversion(
2692 Derived, Base, diag::err_upcast_to_inaccessible_base,
2693 diag::err_ambiguous_derived_to_base_conv, Loc, Range, DeclarationName(),
2694 BasePath, IgnoreAccess);
2695 }
2696
2697
2698 /// Builds a string representing ambiguous paths from a
2699 /// specific derived class to different subobjects of the same base
2700 /// class.
2701 ///
2702 /// This function builds a string that can be used in error messages
2703 /// to show the different paths that one can take through the
2704 /// inheritance hierarchy to go from the derived class to different
2705 /// subobjects of a base class. The result looks something like this:
2706 /// @code
2707 /// struct D -> struct B -> struct A
2708 /// struct D -> struct C -> struct A
2709 /// @endcode
2710 std::string Sema::getAmbiguousPathsDisplayString(CXXBasePaths &Paths) {
2711 std::string PathDisplayStr;
2712 std::set<unsigned> DisplayedPaths;
2713 for (CXXBasePaths::paths_iterator Path = Paths.begin();
2714 Path != Paths.end(); ++Path) {
2715 if (DisplayedPaths.insert(Path->back().SubobjectNumber).second) {
2716 // We haven't displayed a path to this particular base
2717 // class subobject yet.
2718 PathDisplayStr += "\n ";
2719 PathDisplayStr += Context.getTypeDeclType(Paths.getOrigin()).getAsString();
2720 for (CXXBasePath::const_iterator Element = Path->begin();
2721 Element != Path->end(); ++Element)
2722 PathDisplayStr += " -> " + Element->Base->getType().getAsString();
2723 }
2724 }
2725
2726 return PathDisplayStr;
2727 }
2728
2729 //===----------------------------------------------------------------------===//
2730 // C++ class member Handling
2731 //===----------------------------------------------------------------------===//
2732
2733 /// ActOnAccessSpecifier - Parsed an access specifier followed by a colon.
2734 bool Sema::ActOnAccessSpecifier(AccessSpecifier Access, SourceLocation ASLoc,
2735 SourceLocation ColonLoc,
2736 const ParsedAttributesView &Attrs) {
2737 assert(Access != AS_none && "Invalid kind for syntactic access specifier!");
2738 AccessSpecDecl *ASDecl = AccessSpecDecl::Create(Context, Access, CurContext,
2739 ASLoc, ColonLoc);
2740 CurContext->addHiddenDecl(ASDecl);
2741 return ProcessAccessDeclAttributeList(ASDecl, Attrs);
2742 }
2743
2744 /// CheckOverrideControl - Check C++11 override control semantics.
2745 void Sema::CheckOverrideControl(NamedDecl *D) {
2746 if (D->isInvalidDecl())
2747 return;
2748
2749 // We only care about "override" and "final" declarations.
2750 if (!D->hasAttr<OverrideAttr>() && !D->hasAttr<FinalAttr>())
2751 return;
2752
2753 CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D);
2754
2755 // We can't check dependent instance methods.
2756 if (MD && MD->isInstance() &&
2757 (MD->getParent()->hasAnyDependentBases() ||
2758 MD->getType()->isDependentType()))
2759 return;
2760
2761 if (MD && !MD->isVirtual()) {
2762 // If we have a non-virtual method, check if if hides a virtual method.
2763 // (In that case, it's most likely the method has the wrong type.)
2764 SmallVector<CXXMethodDecl *, 8> OverloadedMethods;
2765 FindHiddenVirtualMethods(MD, OverloadedMethods);
2766
2767 if (!OverloadedMethods.empty()) {
2768 if (OverrideAttr *OA = D->getAttr<OverrideAttr>()) {
2769 Diag(OA->getLocation(),
2770 diag::override_keyword_hides_virtual_member_function)
2771 << "override" << (OverloadedMethods.size() > 1);
2772 } else if (FinalAttr *FA = D->getAttr<FinalAttr>()) {
2773 Diag(FA->getLocation(),
2774 diag::override_keyword_hides_virtual_member_function)
2775 << (FA->isSpelledAsSealed() ? "sealed" : "final")
2776 << (OverloadedMethods.size() > 1);
2777 }
2778 NoteHiddenVirtualMethods(MD, OverloadedMethods);
2779 MD->setInvalidDecl();
2780 return;
2781 }
2782 // Fall through into the general case diagnostic.
2783 // FIXME: We might want to attempt typo correction here.
2784 }
2785
2786 if (!MD || !MD->isVirtual()) {
2787 if (OverrideAttr *OA = D->getAttr<OverrideAttr>()) {
2788 Diag(OA->getLocation(),
2789 diag::override_keyword_only_allowed_on_virtual_member_functions)
2790 << "override" << FixItHint::CreateRemoval(OA->getLocation());
2791 D->dropAttr<OverrideAttr>();
2792 }
2793 if (FinalAttr *FA = D->getAttr<FinalAttr>()) {
2794 Diag(FA->getLocation(),
2795 diag::override_keyword_only_allowed_on_virtual_member_functions)
2796 << (FA->isSpelledAsSealed() ? "sealed" : "final")
2797 << FixItHint::CreateRemoval(FA->getLocation());
2798 D->dropAttr<FinalAttr>();
2799 }
2800 return;
2801 }
2802
2803 // C++11 [class.virtual]p5:
2804 // If a function is marked with the virt-specifier override and
2805 // does not override a member function of a base class, the program is
2806 // ill-formed.
2807 bool HasOverriddenMethods = MD->size_overridden_methods() != 0;
2808 if (MD->hasAttr<OverrideAttr>() && !HasOverriddenMethods)
2809 Diag(MD->getLocation(), diag::err_function_marked_override_not_overriding)
2810 << MD->getDeclName();
2811 }
2812
2813 void Sema::DiagnoseAbsenceOfOverrideControl(NamedDecl *D) {
2814 if (D->isInvalidDecl() || D->hasAttr<OverrideAttr>())
2815 return;
2816 CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D);
2817 if (!MD || MD->isImplicit() || MD->hasAttr<FinalAttr>())
2818 return;
2819
2820 SourceLocation Loc = MD->getLocation();
2821 SourceLocation SpellingLoc = Loc;
2822 if (getSourceManager().isMacroArgExpansion(Loc))
2823 SpellingLoc = getSourceManager().getImmediateExpansionRange(Loc).getBegin();
2824 SpellingLoc = getSourceManager().getSpellingLoc(SpellingLoc);
2825 if (SpellingLoc.isValid() && getSourceManager().isInSystemHeader(SpellingLoc))
2826 return;
2827
2828 if (MD->size_overridden_methods() > 0) {
2829 unsigned DiagID = isa<CXXDestructorDecl>(MD)
2830 ? diag::warn_destructor_marked_not_override_overriding
2831 : diag::warn_function_marked_not_override_overriding;
2832 Diag(MD->getLocation(), DiagID) << MD->getDeclName();
2833 const CXXMethodDecl *OMD = *MD->begin_overridden_methods();
2834 Diag(OMD->getLocation(), diag::note_overridden_virtual_function);
2835 }
2836 }
2837
2838 /// CheckIfOverriddenFunctionIsMarkedFinal - Checks whether a virtual member
2839 /// function overrides a virtual member function marked 'final', according to
2840 /// C++11 [class.virtual]p4.
2841 bool Sema::CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New,
2842 const CXXMethodDecl *Old) {
2843 FinalAttr *FA = Old->getAttr<FinalAttr>();
2844 if (!FA)
2845 return false;
2846
2847 Diag(New->getLocation(), diag::err_final_function_overridden)
2848 << New->getDeclName()
2849 << FA->isSpelledAsSealed();
2850 Diag(Old->getLocation(), diag::note_overridden_virtual_function);
2851 return true;
2852 }
2853
2854 static bool InitializationHasSideEffects(const FieldDecl &FD) {
2855 const Type *T = FD.getType()->getBaseElementTypeUnsafe();
2856 // FIXME: Destruction of ObjC lifetime types has side-effects.
2857 if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl())
2858 return !RD->isCompleteDefinition() ||
2859 !RD->hasTrivialDefaultConstructor() ||
2860 !RD->hasTrivialDestructor();
2861 return false;
2862 }
2863
2864 static const ParsedAttr *getMSPropertyAttr(const ParsedAttributesView &list) {
2865 ParsedAttributesView::const_iterator Itr =
2866 llvm::find_if(list, [](const ParsedAttr &AL) {
2867 return AL.isDeclspecPropertyAttribute();
2868 });
2869 if (Itr != list.end())
2870 return &*Itr;
2871 return nullptr;
2872 }
2873
2874 // Check if there is a field shadowing.
2875 void Sema::CheckShadowInheritedFields(const SourceLocation &Loc,
2876 DeclarationName FieldName,
2877 const CXXRecordDecl *RD,
2878 bool DeclIsField) {
2879 if (Diags.isIgnored(diag::warn_shadow_field, Loc))
2880 return;
2881
2882 // To record a shadowed field in a base
2883 std::map<CXXRecordDecl*, NamedDecl*> Bases;
2884 auto FieldShadowed = [&](const CXXBaseSpecifier *Specifier,
2885 CXXBasePath &Path) {
2886 const auto Base = Specifier->getType()->getAsCXXRecordDecl();
2887 // Record an ambiguous path directly
2888 if (Bases.find(Base) != Bases.end())
2889 return true;
2890 for (const auto Field : Base->lookup(FieldName)) {
2891 if ((isa<FieldDecl>(Field) || isa<IndirectFieldDecl>(Field)) &&
2892 Field->getAccess() != AS_private) {
2893 assert(Field->getAccess() != AS_none);
2894 assert(Bases.find(Base) == Bases.end());
2895 Bases[Base] = Field;
2896 return true;
2897 }
2898 }
2899 return false;
2900 };
2901
2902 CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true,
2903 /*DetectVirtual=*/true);
2904 if (!RD->lookupInBases(FieldShadowed, Paths))
2905 return;
2906
2907 for (const auto &P : Paths) {
2908 auto Base = P.back().Base->getType()->getAsCXXRecordDecl();
2909 auto It = Bases.find(Base);
2910 // Skip duplicated bases
2911 if (It == Bases.end())
2912 continue;
2913 auto BaseField = It->second;
2914 assert(BaseField->getAccess() != AS_private);
2915 if (AS_none !=
2916 CXXRecordDecl::MergeAccess(P.Access, BaseField->getAccess())) {
2917 Diag(Loc, diag::warn_shadow_field)
2918 << FieldName << RD << Base << DeclIsField;
2919 Diag(BaseField->getLocation(), diag::note_shadow_field);
2920 Bases.erase(It);
2921 }
2922 }
2923 }
2924
2925 /// ActOnCXXMemberDeclarator - This is invoked when a C++ class member
2926 /// declarator is parsed. 'AS' is the access specifier, 'BW' specifies the
2927 /// bitfield width if there is one, 'InitExpr' specifies the initializer if
2928 /// one has been parsed, and 'InitStyle' is set if an in-class initializer is
2929 /// present (but parsing it has been deferred).
2930 NamedDecl *
2931 Sema::ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, Declarator &D,
2932 MultiTemplateParamsArg TemplateParameterLists,
2933 Expr *BW, const VirtSpecifiers &VS,
2934 InClassInitStyle InitStyle) {
2935 const DeclSpec &DS = D.getDeclSpec();
2936 DeclarationNameInfo NameInfo = GetNameForDeclarator(D);
2937 DeclarationName Name = NameInfo.getName();
2938 SourceLocation Loc = NameInfo.getLoc();
2939
2940 // For anonymous bitfields, the location should point to the type.
2941 if (Loc.isInvalid())
2942 Loc = D.getBeginLoc();
2943
2944 Expr *BitWidth = static_cast<Expr*>(BW);
2945
2946 assert(isa<CXXRecordDecl>(CurContext));
2947 assert(!DS.isFriendSpecified());
2948
2949 bool isFunc = D.isDeclarationOfFunction();
2950 const ParsedAttr *MSPropertyAttr =
2951 getMSPropertyAttr(D.getDeclSpec().getAttributes());
2952
2953 if (cast<CXXRecordDecl>(CurContext)->isInterface()) {
2954 // The Microsoft extension __interface only permits public member functions
2955 // and prohibits constructors, destructors, operators, non-public member
2956 // functions, static methods and data members.
2957 unsigned InvalidDecl;
2958 bool ShowDeclName = true;
2959 if (!isFunc &&
2960 (DS.getStorageClassSpec() == DeclSpec::SCS_typedef || MSPropertyAttr))
2961 InvalidDecl = 0;
2962 else if (!isFunc)
2963 InvalidDecl = 1;
2964 else if (AS != AS_public)
2965 InvalidDecl = 2;
2966 else if (DS.getStorageClassSpec() == DeclSpec::SCS_static)
2967 InvalidDecl = 3;
2968 else switch (Name.getNameKind()) {
2969 case DeclarationName::CXXConstructorName:
2970 InvalidDecl = 4;
2971 ShowDeclName = false;
2972 break;
2973
2974 case DeclarationName::CXXDestructorName:
2975 InvalidDecl = 5;
2976 ShowDeclName = false;
2977 break;
2978
2979 case DeclarationName::CXXOperatorName:
2980 case DeclarationName::CXXConversionFunctionName:
2981 InvalidDecl = 6;
2982 break;
2983
2984 default:
2985 InvalidDecl = 0;
2986 break;
2987 }
2988
2989 if (InvalidDecl) {
2990 if (ShowDeclName)
2991 Diag(Loc, diag::err_invalid_member_in_interface)
2992 << (InvalidDecl-1) << Name;
2993 else
2994 Diag(Loc, diag::err_invalid_member_in_interface)
2995 << (InvalidDecl-1) << "";
2996 return nullptr;
2997 }
2998 }
2999
3000 // C++ 9.2p6: A member shall not be declared to have automatic storage
3001 // duration (auto, register) or with the extern storage-class-specifier.
3002 // C++ 7.1.1p8: The mutable specifier can be applied only to names of class
3003 // data members and cannot be applied to names declared const or static,
3004 // and cannot be applied to reference members.
3005 switch (DS.getStorageClassSpec()) {
3006 case DeclSpec::SCS_unspecified:
3007 case DeclSpec::SCS_typedef:
3008 case DeclSpec::SCS_static:
3009 break;
3010 case DeclSpec::SCS_mutable:
3011 if (isFunc) {
3012 Diag(DS.getStorageClassSpecLoc(), diag::err_mutable_function);
3013
3014 // FIXME: It would be nicer if the keyword was ignored only for this
3015 // declarator. Otherwise we could get follow-up errors.
3016 D.getMutableDeclSpec().ClearStorageClassSpecs();
3017 }
3018 break;
3019 default:
3020 Diag(DS.getStorageClassSpecLoc(),
3021 diag::err_storageclass_invalid_for_member);
3022 D.getMutableDeclSpec().ClearStorageClassSpecs();
3023 break;
3024 }
3025
3026 bool isInstField = ((DS.getStorageClassSpec() == DeclSpec::SCS_unspecified ||
3027 DS.getStorageClassSpec() == DeclSpec::SCS_mutable) &&
3028 !isFunc);
3029
3030 if (DS.isConstexprSpecified() && isInstField) {
3031 SemaDiagnosticBuilder B =
3032 Diag(DS.getConstexprSpecLoc(), diag::err_invalid_constexpr_member);
3033 SourceLocation ConstexprLoc = DS.getConstexprSpecLoc();
3034 if (InitStyle == ICIS_NoInit) {
3035 B << 0 << 0;
3036 if (D.getDeclSpec().getTypeQualifiers() & DeclSpec::TQ_const)
3037 B << FixItHint::CreateRemoval(ConstexprLoc);
3038 else {
3039 B << FixItHint::CreateReplacement(ConstexprLoc, "const");
3040 D.getMutableDeclSpec().ClearConstexprSpec();
3041 const char *PrevSpec;
3042 unsigned DiagID;
3043 bool Failed = D.getMutableDeclSpec().SetTypeQual(
3044 DeclSpec::TQ_const, ConstexprLoc, PrevSpec, DiagID, getLangOpts());
3045 (void)Failed;
3046 assert(!Failed && "Making a constexpr member const shouldn't fail");
3047 }
3048 } else {
3049 B << 1;
3050 const char *PrevSpec;
3051 unsigned DiagID;
3052 if (D.getMutableDeclSpec().SetStorageClassSpec(
3053 *this, DeclSpec::SCS_static, ConstexprLoc, PrevSpec, DiagID,
3054 Context.getPrintingPolicy())) {
3055 assert(DS.getStorageClassSpec() == DeclSpec::SCS_mutable &&
3056 "This is the only DeclSpec that should fail to be applied");
3057 B << 1;
3058 } else {
3059 B << 0 << FixItHint::CreateInsertion(ConstexprLoc, "static ");
3060 isInstField = false;
3061 }
3062 }
3063 }
3064
3065 NamedDecl *Member;
3066 if (isInstField) {
3067 CXXScopeSpec &SS = D.getCXXScopeSpec();
3068
3069 // Data members must have identifiers for names.
3070 if (!Name.isIdentifier()) {
3071 Diag(Loc, diag::err_bad_variable_name)
3072 << Name;
3073 return nullptr;
3074 }
3075
3076 IdentifierInfo *II = Name.getAsIdentifierInfo();
3077
3078 // Member field could not be with "template" keyword.
3079 // So TemplateParameterLists should be empty in this case.
3080 if (TemplateParameterLists.size()) {
3081 TemplateParameterList* TemplateParams = TemplateParameterLists[0];
3082 if (TemplateParams->size()) {
3083 // There is no such thing as a member field template.
3084 Diag(D.getIdentifierLoc(), diag::err_template_member)
3085 << II
3086 << SourceRange(TemplateParams->getTemplateLoc(),
3087 TemplateParams->getRAngleLoc());
3088 } else {
3089 // There is an extraneous 'template<>' for this member.
3090 Diag(TemplateParams->getTemplateLoc(),
3091 diag::err_template_member_noparams)
3092 << II
3093 << SourceRange(TemplateParams->getTemplateLoc(),
3094 TemplateParams->getRAngleLoc());
3095 }
3096 return nullptr;
3097 }
3098
3099 if (SS.isSet() && !SS.isInvalid()) {
3100 // The user provided a superfluous scope specifier inside a class
3101 // definition:
3102 //
3103 // class X {
3104 // int X::member;
3105 // };
3106 if (DeclContext *DC = computeDeclContext(SS, false))
3107 diagnoseQualifiedDeclaration(SS, DC, Name, D.getIdentifierLoc(),
3108 D.getName().getKind() ==
3109 UnqualifiedIdKind::IK_TemplateId);
3110 else
3111 Diag(D.getIdentifierLoc(), diag::err_member_qualification)
3112 << Name << SS.getRange();
3113
3114 SS.clear();
3115 }
3116
3117 if (MSPropertyAttr) {
3118 Member = HandleMSProperty(S, cast<CXXRecordDecl>(CurContext), Loc, D,
3119 BitWidth, InitStyle, AS, *MSPropertyAttr);
3120 if (!Member)
3121 return nullptr;
3122 isInstField = false;
3123 } else {
3124 Member = HandleField(S, cast<CXXRecordDecl>(CurContext), Loc, D,
3125 BitWidth, InitStyle, AS);
3126 if (!Member)
3127 return nullptr;
3128 }
3129
3130 CheckShadowInheritedFields(Loc, Name, cast<CXXRecordDecl>(CurContext));
3131 } else {
3132 Member = HandleDeclarator(S, D, TemplateParameterLists);
3133 if (!Member)
3134 return nullptr;
3135
3136 // Non-instance-fields can't have a bitfield.
3137 if (BitWidth) {
3138 if (Member->isInvalidDecl()) {
3139 // don't emit another diagnostic.
3140 } else if (isa<VarDecl>(Member) || isa<VarTemplateDecl>(Member)) {
3141 // C++ 9.6p3: A bit-field shall not be a static member.
3142 // "static member 'A' cannot be a bit-field"
3143 Diag(Loc, diag::err_static_not_bitfield)
3144 << Name << BitWidth->getSourceRange();
3145 } else if (isa<TypedefDecl>(Member)) {
3146 // "typedef member 'x' cannot be a bit-field"
3147 Diag(Loc, diag::err_typedef_not_bitfield)
3148 << Name << BitWidth->getSourceRange();
3149 } else {
3150 // A function typedef ("typedef int f(); f a;").
3151 // C++ 9.6p3: A bit-field shall have integral or enumeration type.
3152 Diag(Loc, diag::err_not_integral_type_bitfield)
3153 << Name << cast<ValueDecl>(Member)->getType()
3154 << BitWidth->getSourceRange();
3155 }
3156
3157 BitWidth = nullptr;
3158 Member->setInvalidDecl();
3159 }
3160
3161 NamedDecl *NonTemplateMember = Member;
3162 if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(Member))
3163 NonTemplateMember = FunTmpl->getTemplatedDecl();
3164 else if (VarTemplateDecl *VarTmpl = dyn_cast<VarTemplateDecl>(Member))
3165 NonTemplateMember = VarTmpl->getTemplatedDecl();
3166
3167 Member->setAccess(AS);
3168
3169 // If we have declared a member function template or static data member
3170 // template, set the access of the templated declaration as well.
3171 if (NonTemplateMember != Member)
3172 NonTemplateMember->setAccess(AS);
3173
3174 // C++ [temp.deduct.guide]p3:
3175 // A deduction guide [...] for a member class template [shall be
3176 // declared] with the same access [as the template].
3177 if (auto *DG = dyn_cast<CXXDeductionGuideDecl>(NonTemplateMember)) {
3178 auto *TD = DG->getDeducedTemplate();
3179 if (AS != TD->getAccess()) {
3180 Diag(DG->getBeginLoc(), diag::err_deduction_guide_wrong_access);
3181 Diag(TD->getBeginLoc(), diag::note_deduction_guide_template_access)
3182 << TD->getAccess();
3183 const AccessSpecDecl *LastAccessSpec = nullptr;
3184 for (const auto *D : cast<CXXRecordDecl>(CurContext)->decls()) {
3185 if (const auto *AccessSpec = dyn_cast<AccessSpecDecl>(D))
3186 LastAccessSpec = AccessSpec;
3187 }
3188 assert(LastAccessSpec && "differing access with no access specifier");
3189 Diag(LastAccessSpec->getBeginLoc(), diag::note_deduction_guide_access)
3190 << AS;
3191 }
3192 }
3193 }
3194
3195 if (VS.isOverrideSpecified())
3196 Member->addAttr(new (Context) OverrideAttr(VS.getOverrideLoc(), Context, 0));
3197 if (VS.isFinalSpecified())
3198 Member->addAttr(new (Context) FinalAttr(VS.getFinalLoc(), Context,
3199 VS.isFinalSpelledSealed()));
3200
3201 if (VS.getLastLocation().isValid()) {
3202 // Update the end location of a method that has a virt-specifiers.
3203 if (CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(Member))
3204 MD->setRangeEnd(VS.getLastLocation());
3205 }
3206
3207 CheckOverrideControl(Member);
3208
3209 assert((Name || isInstField) && "No identifier for non-field ?");
3210
3211 if (isInstField) {
3212 FieldDecl *FD = cast<FieldDecl>(Member);
3213 FieldCollector->Add(FD);
3214
3215 if (!Diags.isIgnored(diag::warn_unused_private_field, FD->getLocation())) {
3216 // Remember all explicit private FieldDecls that have a name, no side
3217 // effects and are not part of a dependent type declaration.
3218 if (!FD->isImplicit() && FD->getDeclName() &&
3219 FD->getAccess() == AS_private &&
3220 !FD->hasAttr<UnusedAttr>() &&
3221 !FD->getParent()->isDependentContext() &&
3222 !InitializationHasSideEffects(*FD))
3223 UnusedPrivateFields.insert(FD);
3224 }
3225 }
3226
3227 return Member;
3228 }
3229
3230 namespace {
3231 class UninitializedFieldVisitor
3232 : public EvaluatedExprVisitor<UninitializedFieldVisitor> {
3233 Sema &S;
3234 // List of Decls to generate a warning on. Also remove Decls that become
3235 // initialized.
3236 llvm::SmallPtrSetImpl<ValueDecl*> &Decls;
3237 // List of base classes of the record. Classes are removed after their
3238 // initializers.
3239 llvm::SmallPtrSetImpl<QualType> &BaseClasses;
3240 // Vector of decls to be removed from the Decl set prior to visiting the
3241 // nodes. These Decls may have been initialized in the prior initializer.
3242 llvm::SmallVector<ValueDecl*, 4> DeclsToRemove;
3243 // If non-null, add a note to the warning pointing back to the constructor.
3244 const CXXConstructorDecl *Constructor;
3245 // Variables to hold state when processing an initializer list. When
3246 // InitList is true, special case initialization of FieldDecls matching
3247 // InitListFieldDecl.
3248 bool InitList;
3249 FieldDecl *InitListFieldDecl;
3250 llvm::SmallVector<unsigned, 4> InitFieldIndex;
3251
3252 public:
3253 typedef EvaluatedExprVisitor<UninitializedFieldVisitor> Inherited;
3254 UninitializedFieldVisitor(Sema &S,
3255 llvm::SmallPtrSetImpl<ValueDecl*> &Decls,
3256 llvm::SmallPtrSetImpl<QualType> &BaseClasses)
3257 : Inherited(S.Context), S(S), Decls(Decls), BaseClasses(BaseClasses),
3258 Constructor(nullptr), InitList(false), InitListFieldDecl(nullptr) {}
3259
3260 // Returns true if the use of ME is not an uninitialized use.
3261 bool IsInitListMemberExprInitialized(MemberExpr *ME,
3262 bool CheckReferenceOnly) {
3263 llvm::SmallVector<FieldDecl*, 4> Fields;
3264 bool ReferenceField = false;
3265 while (ME) {
3266 FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl());
3267 if (!FD)
3268 return false;
3269 Fields.push_back(FD);
3270 if (FD->getType()->isReferenceType())
3271 ReferenceField = true;
3272 ME = dyn_cast<MemberExpr>(ME->getBase()->IgnoreParenImpCasts());
3273 }
3274
3275 // Binding a reference to an uninitialized field is not an
3276 // uninitialized use.
3277 if (CheckReferenceOnly && !ReferenceField)
3278 return true;
3279
3280 llvm::SmallVector<unsigned, 4> UsedFieldIndex;
3281 // Discard the first field since it is the field decl that is being
3282 // initialized.
3283 for (auto I = Fields.rbegin() + 1, E = Fields.rend(); I != E; ++I) {
3284 UsedFieldIndex.push_back((*I)->getFieldIndex());
3285 }
3286
3287 for (auto UsedIter = UsedFieldIndex.begin(),
3288 UsedEnd = UsedFieldIndex.end(),
3289 OrigIter = InitFieldIndex.begin(),
3290 OrigEnd = InitFieldIndex.end();
3291 UsedIter != UsedEnd && OrigIter != OrigEnd; ++UsedIter, ++OrigIter) {
3292 if (*UsedIter < *OrigIter)
3293 return true;
3294 if (*UsedIter > *OrigIter)
3295 break;
3296 }
3297
3298 return false;
3299 }
3300
3301 void HandleMemberExpr(MemberExpr *ME, bool CheckReferenceOnly,
3302 bool AddressOf) {
3303 if (isa<EnumConstantDecl>(ME->getMemberDecl()))
3304 return;
3305
3306 // FieldME is the inner-most MemberExpr that is not an anonymous struct
3307 // or union.
3308 MemberExpr *FieldME = ME;
3309
3310 bool AllPODFields = FieldME->getType().isPODType(S.Context);
3311
3312 Expr *Base = ME;
3313 while (MemberExpr *SubME =
3314 dyn_cast<MemberExpr>(Base->IgnoreParenImpCasts())) {
3315
3316 if (isa<VarDecl>(SubME->getMemberDecl()))
3317 return;
3318
3319 if (FieldDecl *FD = dyn_cast<FieldDecl>(SubME->getMemberDecl()))
3320 if (!FD->isAnonymousStructOrUnion())
3321 FieldME = SubME;
3322
3323 if (!FieldME->getType().isPODType(S.Context))
3324 AllPODFields = false;
3325
3326 Base = SubME->getBase();
3327 }
3328
3329 if (!isa<CXXThisExpr>(Base->IgnoreParenImpCasts()))
3330 return;
3331
3332 if (AddressOf && AllPODFields)
3333 return;
3334
3335 ValueDecl* FoundVD = FieldME->getMemberDecl();
3336
3337 if (ImplicitCastExpr *BaseCast = dyn_cast<ImplicitCastExpr>(Base)) {
3338 while (isa<ImplicitCastExpr>(BaseCast->getSubExpr())) {
3339 BaseCast = cast<ImplicitCastExpr>(BaseCast->getSubExpr());
3340 }
3341
3342 if (BaseCast->getCastKind() == CK_UncheckedDerivedToBase) {
3343 QualType T = BaseCast->getType();
3344 if (T->isPointerType() &&
3345 BaseClasses.count(T->getPointeeType())) {
3346 S.Diag(FieldME->getExprLoc(), diag::warn_base_class_is_uninit)
3347 << T->getPointeeType() << FoundVD;
3348 }
3349 }
3350 }
3351
3352 if (!Decls.count(FoundVD))
3353 return;
3354
3355 const bool IsReference = FoundVD->getType()->isReferenceType();
3356
3357 if (InitList && !AddressOf && FoundVD == InitListFieldDecl) {
3358 // Special checking for initializer lists.
3359 if (IsInitListMemberExprInitialized(ME, CheckReferenceOnly)) {
3360 return;
3361 }
3362 } else {
3363 // Prevent double warnings on use of unbounded references.
3364 if (CheckReferenceOnly && !IsReference)
3365 return;
3366 }
3367
3368 unsigned diag = IsReference
3369 ? diag::warn_reference_field_is_uninit
3370 : diag::warn_field_is_uninit;
3371 S.Diag(FieldME->getExprLoc(), diag) << FoundVD;
3372 if (Constructor)
3373 S.Diag(Constructor->getLocation(),
3374 diag::note_uninit_in_this_constructor)
3375 << (Constructor->isDefaultConstructor() && Constructor->isImplicit());
3376
3377 }
3378
3379 void HandleValue(Expr *E, bool AddressOf) {
3380 E = E->IgnoreParens();
3381
3382 if (MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
3383 HandleMemberExpr(ME, false /*CheckReferenceOnly*/,
3384 AddressOf /*AddressOf*/);
3385 return;
3386 }
3387
3388 if (ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) {
3389 Visit(CO->getCond());
3390 HandleValue(CO->getTrueExpr(), AddressOf);
3391 HandleValue(CO->getFalseExpr(), AddressOf);
3392 return;
3393 }
3394
3395 if (BinaryConditionalOperator *BCO =
3396 dyn_cast<BinaryConditionalOperator>(E)) {
3397 Visit(BCO->getCond());
3398 HandleValue(BCO->getFalseExpr(), AddressOf);
3399 return;
3400 }
3401
3402 if (OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(E)) {
3403 HandleValue(OVE->getSourceExpr(), AddressOf);
3404 return;
3405 }
3406
3407 if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
3408 switch (BO->getOpcode()) {
3409 default:
3410 break;
3411 case(BO_PtrMemD):
3412 case(BO_PtrMemI):
3413 HandleValue(BO->getLHS(), AddressOf);
3414 Visit(BO->getRHS());
3415 return;
3416 case(BO_Comma):
3417 Visit(BO->getLHS());
3418 HandleValue(BO->getRHS(), AddressOf);
3419 return;
3420 }
3421 }
3422
3423 Visit(E);
3424 }
3425
3426 void CheckInitListExpr(InitListExpr *ILE) {
3427 InitFieldIndex.push_back(0);
3428 for (auto Child : ILE->children()) {
3429 if (InitListExpr *SubList = dyn_cast<InitListExpr>(Child)) {
3430 CheckInitListExpr(SubList);
3431 } else {
3432 Visit(Child);
3433 }
3434 ++InitFieldIndex.back();
3435 }
3436 InitFieldIndex.pop_back();
3437 }
3438
3439 void CheckInitializer(Expr *E, const CXXConstructorDecl *FieldConstructor,
3440 FieldDecl *Field, const Type *BaseClass) {
3441 // Remove Decls that may have been initialized in the previous
3442 // initializer.
3443 for (ValueDecl* VD : DeclsToRemove)
3444 Decls.erase(VD);
3445 DeclsToRemove.clear();
3446
3447 Constructor = FieldConstructor;
3448 InitListExpr *ILE = dyn_cast<InitListExpr>(E);
3449
3450 if (ILE && Field) {
3451 InitList = true;
3452 InitListFieldDecl = Field;
3453 InitFieldIndex.clear();
3454 CheckInitListExpr(ILE);
3455 } else {
3456 InitList = false;
3457 Visit(E);
3458 }
3459
3460 if (Field)
3461 Decls.erase(Field);
3462 if (BaseClass)
3463 BaseClasses.erase(BaseClass->getCanonicalTypeInternal());
3464 }
3465
3466 void VisitMemberExpr(MemberExpr *ME) {
3467 // All uses of unbounded reference fields will warn.
3468 HandleMemberExpr(ME, true /*CheckReferenceOnly*/, false /*AddressOf*/);
3469 }
3470
3471 void VisitImplicitCastExpr(ImplicitCastExpr *E) {
3472 if (E->getCastKind() == CK_LValueToRValue) {
3473 HandleValue(E->getSubExpr(), false /*AddressOf*/);
3474 return;
3475 }
3476
3477 Inherited::VisitImplicitCastExpr(E);
3478 }
3479
3480 void VisitCXXConstructExpr(CXXConstructExpr *E) {
3481 if (E->getConstructor()->isCopyConstructor()) {
3482 Expr *ArgExpr = E->getArg(0);
3483 if (InitListExpr *ILE = dyn_cast<InitListExpr>(ArgExpr))
3484 if (ILE->getNumInits() == 1)
3485 ArgExpr = ILE->getInit(0);
3486 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(ArgExpr))
3487 if (ICE->getCastKind() == CK_NoOp)
3488 ArgExpr = ICE->getSubExpr();
3489 HandleValue(ArgExpr, false /*AddressOf*/);
3490 return;
3491 }
3492 Inherited::VisitCXXConstructExpr(E);
3493 }
3494
3495 void VisitCXXMemberCallExpr(CXXMemberCallExpr *E) {
3496 Expr *Callee = E->getCallee();
3497 if (isa<MemberExpr>(Callee)) {
3498 HandleValue(Callee, false /*AddressOf*/);
3499 for (auto Arg : E->arguments())
3500 Visit(Arg);
3501 return;
3502 }
3503
3504 Inherited::VisitCXXMemberCallExpr(E);
3505 }
3506
3507 void VisitCallExpr(CallExpr *E) {
3508 // Treat std::move as a use.
3509 if (E->isCallToStdMove()) {
3510 HandleValue(E->getArg(0), /*AddressOf=*/false);
3511 return;
3512 }
3513
3514 Inherited::VisitCallExpr(E);
3515 }
3516
3517 void VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) {
3518 Expr *Callee = E->getCallee();
3519
3520 if (isa<UnresolvedLookupExpr>(Callee))
3521 return Inherited::VisitCXXOperatorCallExpr(E);
3522
3523 Visit(Callee);
3524 for (auto Arg : E->arguments())
3525 HandleValue(Arg->IgnoreParenImpCasts(), false /*AddressOf*/);
3526 }
3527
3528 void VisitBinaryOperator(BinaryOperator *E) {
3529 // If a field assignment is detected, remove the field from the
3530 // uninitiailized field set.
3531 if (E->getOpcode() == BO_Assign)
3532 if (MemberExpr *ME = dyn_cast<MemberExpr>(E->getLHS()))
3533 if (FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl()))
3534 if (!FD->getType()->isReferenceType())
3535 DeclsToRemove.push_back(FD);
3536
3537 if (E->isCompoundAssignmentOp()) {
3538 HandleValue(E->getLHS(), false /*AddressOf*/);
3539 Visit(E->getRHS());
3540 return;
3541 }
3542
3543 Inherited::VisitBinaryOperator(E);
3544 }
3545
3546 void VisitUnaryOperator(UnaryOperator *E) {
3547 if (E->isIncrementDecrementOp()) {
3548 HandleValue(E->getSubExpr(), false /*AddressOf*/);
3549 return;
3550 }
3551 if (E->getOpcode() == UO_AddrOf) {
3552 if (MemberExpr *ME = dyn_cast<MemberExpr>(E->getSubExpr())) {
3553 HandleValue(ME->getBase(), true /*AddressOf*/);
3554 return;
3555 }
3556 }
3557
3558 Inherited::VisitUnaryOperator(E);
3559 }
3560 };
3561
3562 // Diagnose value-uses of fields to initialize themselves, e.g.
3563 // foo(foo)
3564 // where foo is not also a parameter to the constructor.
3565 // Also diagnose across field uninitialized use such as
3566 // x(y), y(x)
3567 // TODO: implement -Wuninitialized and fold this into that framework.
3568 static void DiagnoseUninitializedFields(
3569 Sema &SemaRef, const CXXConstructorDecl *Constructor) {
3570
3571 if (SemaRef.getDiagnostics().isIgnored(diag::warn_field_is_uninit,
3572 Constructor->getLocation())) {
3573 return;
3574 }
3575
3576 if (Constructor->isInvalidDecl())
3577 return;
3578
3579 const CXXRecordDecl *RD = Constructor->getParent();
3580
3581 if (RD->getDescribedClassTemplate())
3582 return;
3583
3584 // Holds fields that are uninitialized.
3585 llvm::SmallPtrSet<ValueDecl*, 4> UninitializedFields;
3586
3587 // At the beginning, all fields are uninitialized.
3588 for (auto *I : RD->decls()) {
3589 if (auto *FD = dyn_cast<FieldDecl>(I)) {
3590 UninitializedFields.insert(FD);
3591 } else if (auto *IFD = dyn_cast<IndirectFieldDecl>(I)) {
3592 UninitializedFields.insert(IFD->getAnonField());
3593 }
3594 }
3595
3596 llvm::SmallPtrSet<QualType, 4> UninitializedBaseClasses;
3597 for (auto I : RD->bases())
3598 UninitializedBaseClasses.insert(I.getType().getCanonicalType());
3599
3600 if (UninitializedFields.empty() && UninitializedBaseClasses.empty())
3601 return;
3602
3603 UninitializedFieldVisitor UninitializedChecker(SemaRef,
3604 UninitializedFields,
3605 UninitializedBaseClasses);
3606
3607 for (const auto *FieldInit : Constructor->inits()) {
3608 if (UninitializedFields.empty() && UninitializedBaseClasses.empty())
3609 break;
3610
3611 Expr *InitExpr = FieldInit->getInit();
3612 if (!InitExpr)
3613 continue;
3614
3615 if (CXXDefaultInitExpr *Default =
3616 dyn_cast<CXXDefaultInitExpr>(InitExpr)) {
3617 InitExpr = Default->getExpr();
3618 if (!InitExpr)
3619 continue;
3620 // In class initializers will point to the constructor.
3621 UninitializedChecker.CheckInitializer(InitExpr, Constructor,
3622 FieldInit->getAnyMember(),
3623 FieldInit->getBaseClass());
3624 } else {
3625 UninitializedChecker.CheckInitializer(InitExpr, nullptr,
3626 FieldInit->getAnyMember(),
3627 FieldInit->getBaseClass());
3628 }
3629 }
3630 }
3631 } // namespace
3632
3633 /// Enter a new C++ default initializer scope. After calling this, the
3634 /// caller must call \ref ActOnFinishCXXInClassMemberInitializer, even if
3635 /// parsing or instantiating the initializer failed.
3636 void Sema::ActOnStartCXXInClassMemberInitializer() {
3637 // Create a synthetic function scope to represent the call to the constructor
3638 // that notionally surrounds a use of this initializer.
3639 PushFunctionScope();
3640 }
3641
3642 /// This is invoked after parsing an in-class initializer for a
3643 /// non-static C++ class member, and after instantiating an in-class initializer
3644 /// in a class template. Such actions are deferred until the class is complete.
3645 void Sema::ActOnFinishCXXInClassMemberInitializer(Decl *D,
3646 SourceLocation InitLoc,
3647 Expr *InitExpr) {
3648 // Pop the notional constructor scope we created earlier.
3649 PopFunctionScopeInfo(nullptr, D);
3650
3651 FieldDecl *FD = dyn_cast<FieldDecl>(D);
3652 assert((isa<MSPropertyDecl>(D) || FD->getInClassInitStyle() != ICIS_NoInit) &&
3653 "must set init style when field is created");
3654
3655 if (!InitExpr) {
3656 D->setInvalidDecl();
3657 if (FD)
3658 FD->removeInClassInitializer();
3659 return;
3660 }
3661
3662 if (DiagnoseUnexpandedParameterPack(InitExpr, UPPC_Initializer)) {
3663 FD->setInvalidDecl();
3664 FD->removeInClassInitializer();
3665 return;
3666 }
3667
3668 ExprResult Init = InitExpr;
3669 if (!FD->getType()->isDependentType() && !InitExpr->isTypeDependent()) {
3670 InitializedEntity Entity =
3671 InitializedEntity::InitializeMemberFromDefaultMemberInitializer(FD);
3672 InitializationKind Kind =
3673 FD->getInClassInitStyle() == ICIS_ListInit
3674 ? InitializationKind::CreateDirectList(InitExpr->getBeginLoc(),
3675 InitExpr->getBeginLoc(),
3676 InitExpr->getEndLoc())
3677 : InitializationKind::CreateCopy(InitExpr->getBeginLoc(), InitLoc);
3678 InitializationSequence Seq(*this, Entity, Kind, InitExpr);
3679 Init = Seq.Perform(*this, Entity, Kind, InitExpr);
3680 if (Init.isInvalid()) {
3681 FD->setInvalidDecl();
3682 return;
3683 }
3684 }
3685
3686 // C++11 [class.base.init]p7:
3687 // The initialization of each base and member constitutes a
3688 // full-expression.
3689 Init = ActOnFinishFullExpr(Init.get(), InitLoc, /*DiscardedValue*/ false);
3690 if (Init.isInvalid()) {
3691 FD->setInvalidDecl();
3692 return;
3693 }
3694
3695 InitExpr = Init.get();
3696
3697 FD->setInClassInitializer(InitExpr);
3698 }
3699
3700 /// Find the direct and/or virtual base specifiers that
3701 /// correspond to the given base type, for use in base initialization
3702 /// within a constructor.
3703 static bool FindBaseInitializer(Sema &SemaRef,
3704 CXXRecordDecl *ClassDecl,
3705 QualType BaseType,
3706 const CXXBaseSpecifier *&DirectBaseSpec,
3707 const CXXBaseSpecifier *&VirtualBaseSpec) {
3708 // First, check for a direct base class.
3709 DirectBaseSpec = nullptr;
3710 for (const auto &Base : ClassDecl->bases()) {
3711 if (SemaRef.Context.hasSameUnqualifiedType(BaseType, Base.getType())) {
3712 // We found a direct base of this type. That's what we're
3713 // initializing.
3714 DirectBaseSpec = &Base;
3715 break;
3716 }
3717 }
3718
3719 // Check for a virtual base class.
3720 // FIXME: We might be able to short-circuit this if we know in advance that
3721 // there are no virtual bases.
3722 VirtualBaseSpec = nullptr;
3723 if (!DirectBaseSpec || !DirectBaseSpec->isVirtual()) {
3724 // We haven't found a base yet; search the class hierarchy for a
3725 // virtual base class.
3726 CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true,
3727 /*DetectVirtual=*/false);
3728 if (SemaRef.IsDerivedFrom(ClassDecl->getLocation(),
3729 SemaRef.Context.getTypeDeclType(ClassDecl),
3730 BaseType, Paths)) {
3731 for (CXXBasePaths::paths_iterator Path = Paths.begin();
3732 Path != Paths.end(); ++Path) {
3733 if (Path->back().Base->isVirtual()) {
3734 VirtualBaseSpec = Path->back().Base;
3735 break;
3736 }
3737 }
3738 }
3739 }
3740
3741 return DirectBaseSpec || VirtualBaseSpec;
3742 }
3743
3744 /// Handle a C++ member initializer using braced-init-list syntax.
3745 MemInitResult
3746 Sema::ActOnMemInitializer(Decl *ConstructorD,
3747 Scope *S,
3748 CXXScopeSpec &SS,
3749 IdentifierInfo *MemberOrBase,
3750 ParsedType TemplateTypeTy,
3751 const DeclSpec &DS,
3752 SourceLocation IdLoc,
3753 Expr *InitList,
3754 SourceLocation EllipsisLoc) {
3755 return BuildMemInitializer(ConstructorD, S, SS, MemberOrBase, TemplateTypeTy,
3756 DS, IdLoc, InitList,
3757 EllipsisLoc);
3758 }
3759
3760 /// Handle a C++ member initializer using parentheses syntax.
3761 MemInitResult
3762 Sema::ActOnMemInitializer(Decl *ConstructorD,
3763 Scope *S,
3764 CXXScopeSpec &SS,
3765 IdentifierInfo *MemberOrBase,
3766 ParsedType TemplateTypeTy,
3767 const DeclSpec &DS,
3768 SourceLocation IdLoc,
3769 SourceLocation LParenLoc,
3770 ArrayRef<Expr *> Args,
3771 SourceLocation RParenLoc,
3772 SourceLocation EllipsisLoc) {
3773 Expr *List = ParenListExpr::Create(Context, LParenLoc, Args, RParenLoc);
3774 return BuildMemInitializer(ConstructorD, S, SS, MemberOrBase, TemplateTypeTy,
3775 DS, IdLoc, List, EllipsisLoc);
3776 }
3777
3778 namespace {
3779
3780 // Callback to only accept typo corrections that can be a valid C++ member
3781 // intializer: either a non-static field member or a base class.
3782 class MemInitializerValidatorCCC : public CorrectionCandidateCallback {
3783 public:
3784 explicit MemInitializerValidatorCCC(CXXRecordDecl *ClassDecl)
3785 : ClassDecl(ClassDecl) {}
3786
3787 bool ValidateCandidate(const TypoCorrection &candidate) override {
3788 if (NamedDecl *ND = candidate.getCorrectionDecl()) {
3789 if (FieldDecl *Member = dyn_cast<FieldDecl>(ND))
3790 return Member->getDeclContext()->getRedeclContext()->Equals(ClassDecl);
3791 return isa<TypeDecl>(ND);
3792 }
3793 return false;
3794 }
3795
3796 private:
3797 CXXRecordDecl *ClassDecl;
3798 };
3799
3800 }
3801
3802 ValueDecl *Sema::tryLookupCtorInitMemberDecl(CXXRecordDecl *ClassDecl,
3803 CXXScopeSpec &SS,
3804 ParsedType TemplateTypeTy,
3805 IdentifierInfo *MemberOrBase) {
3806 if (SS.getScopeRep() || TemplateTypeTy)
3807 return nullptr;
3808 DeclContext::lookup_result Result = ClassDecl->lookup(MemberOrBase);
3809 if (Result.empty())
3810 return nullptr;
3811 ValueDecl *Member;
3812 if ((Member = dyn_cast<FieldDecl>(Result.front())) ||
3813 (Member = dyn_cast<IndirectFieldDecl>(Result.front())))
3814 return Member;
3815 return nullptr;
3816 }
3817
3818 /// Handle a C++ member initializer.
3819 MemInitResult
3820 Sema::BuildMemInitializer(Decl *ConstructorD,
3821 Scope *S,
3822 CXXScopeSpec &SS,
3823 IdentifierInfo *MemberOrBase,
3824 ParsedType TemplateTypeTy,
3825 const DeclSpec &DS,
3826 SourceLocation IdLoc,
3827 Expr *Init,
3828 SourceLocation EllipsisLoc) {
3829 ExprResult Res = CorrectDelayedTyposInExpr(Init);
3830 if (!Res.isUsable())
3831 return true;
3832 Init = Res.get();
3833
3834 if (!ConstructorD)
3835 return true;
3836
3837 AdjustDeclIfTemplate(ConstructorD);
3838
3839 CXXConstructorDecl *Constructor
3840 = dyn_cast<CXXConstructorDecl>(ConstructorD);
3841 if (!Constructor) {
3842 // The user wrote a constructor initializer on a function that is
3843 // not a C++ constructor. Ignore the error for now, because we may
3844 // have more member initializers coming; we'll diagnose it just
3845 // once in ActOnMemInitializers.
3846 return true;
3847 }
3848
3849 CXXRecordDecl *ClassDecl = Constructor->getParent();
3850
3851 // C++ [class.base.init]p2:
3852 // Names in a mem-initializer-id are looked up in the scope of the
3853 // constructor's class and, if not found in that scope, are looked
3854 // up in the scope containing the constructor's definition.
3855 // [Note: if the constructor's class contains a member with the
3856 // same name as a direct or virtual base class of the class, a
3857 // mem-initializer-id naming the member or base class and composed
3858 // of a single identifier refers to the class member. A
3859 // mem-initializer-id for the hidden base class may be specified
3860 // using a qualified name. ]
3861
3862 // Look for a member, first.
3863 if (ValueDecl *Member = tryLookupCtorInitMemberDecl(
3864 ClassDecl, SS, TemplateTypeTy, MemberOrBase)) {
3865 if (EllipsisLoc.isValid())
3866 Diag(EllipsisLoc, diag::err_pack_expansion_member_init)
3867 << MemberOrBase
3868 << SourceRange(IdLoc, Init->getSourceRange().getEnd());
3869
3870 return BuildMemberInitializer(Member, Init, IdLoc);
3871 }
3872 // It didn't name a member, so see if it names a class.
3873 QualType BaseType;
3874 TypeSourceInfo *TInfo = nullptr;
3875
3876 if (TemplateTypeTy) {
3877 BaseType = GetTypeFromParser(TemplateTypeTy, &TInfo);
3878 } else if (DS.getTypeSpecType() == TST_decltype) {
3879 BaseType = BuildDecltypeType(DS.getRepAsExpr(), DS.getTypeSpecTypeLoc());
3880 } else if (DS.getTypeSpecType() == TST_decltype_auto) {
3881 Diag(DS.getTypeSpecTypeLoc(), diag::err_decltype_auto_invalid);
3882 return true;
3883 } else {
3884 LookupResult R(*this, MemberOrBase, IdLoc, LookupOrdinaryName);
3885 LookupParsedName(R, S, &SS);
3886
3887 TypeDecl *TyD = R.getAsSingle<TypeDecl>();
3888 if (!TyD) {
3889 if (R.isAmbiguous()) return true;
3890
3891 // We don't want access-control diagnostics here.
3892 R.suppressDiagnostics();
3893
3894 if (SS.isSet() && isDependentScopeSpecifier(SS)) {
3895 bool NotUnknownSpecialization = false;
3896 DeclContext *DC = computeDeclContext(SS, false);
3897 if (CXXRecordDecl *Record = dyn_cast_or_null<CXXRecordDecl>(DC))
3898 NotUnknownSpecialization = !Record->hasAnyDependentBases();
3899
3900 if (!NotUnknownSpecialization) {
3901 // When the scope specifier can refer to a member of an unknown
3902 // specialization, we take it as a type name.
3903 BaseType = CheckTypenameType(ETK_None, SourceLocation(),
3904 SS.getWithLocInContext(Context),
3905 *MemberOrBase, IdLoc);
3906 if (BaseType.isNull())
3907 return true;
3908
3909 TInfo = Context.CreateTypeSourceInfo(BaseType);
3910 DependentNameTypeLoc TL =
3911 TInfo->getTypeLoc().castAs<DependentNameTypeLoc>();
3912 if (!TL.isNull()) {
3913 TL.setNameLoc(IdLoc);
3914 TL.setElaboratedKeywordLoc(SourceLocation());
3915 TL.setQualifierLoc(SS.getWithLocInContext(Context));
3916 }
3917
3918 R.clear();
3919 R.setLookupName(MemberOrBase);
3920 }
3921 }
3922
3923 // If no results were found, try to correct typos.
3924 TypoCorrection Corr;
3925 if (R.empty() && BaseType.isNull() &&
3926 (Corr = CorrectTypo(
3927 R.getLookupNameInfo(), R.getLookupKind(), S, &SS,
3928 llvm::make_unique<MemInitializerValidatorCCC>(ClassDecl),
3929 CTK_ErrorRecovery, ClassDecl))) {
3930 if (FieldDecl *Member = Corr.getCorrectionDeclAs<FieldDecl>()) {
3931 // We have found a non-static data member with a similar
3932 // name to what was typed; complain and initialize that
3933 // member.
3934 diagnoseTypo(Corr,
3935 PDiag(diag::err_mem_init_not_member_or_class_suggest)
3936 << MemberOrBase << true);
3937 return BuildMemberInitializer(Member, Init, IdLoc);
3938 } else if (TypeDecl *Type = Corr.getCorrectionDeclAs<TypeDecl>()) {
3939 const CXXBaseSpecifier *DirectBaseSpec;
3940 const CXXBaseSpecifier *VirtualBaseSpec;
3941 if (FindBaseInitializer(*this, ClassDecl,
3942 Context.getTypeDeclType(Type),
3943 DirectBaseSpec, VirtualBaseSpec)) {
3944 // We have found a direct or virtual base class with a
3945 // similar name to what was typed; complain and initialize
3946 // that base class.
3947 diagnoseTypo(Corr,
3948 PDiag(diag::err_mem_init_not_member_or_class_suggest)
3949 << MemberOrBase << false,
3950 PDiag() /*Suppress note, we provide our own.*/);
3951
3952 const CXXBaseSpecifier *BaseSpec = DirectBaseSpec ? DirectBaseSpec
3953 : VirtualBaseSpec;
3954 Diag(BaseSpec->getBeginLoc(), diag::note_base_class_specified_here)
3955 << BaseSpec->getType() << BaseSpec->getSourceRange();
3956
3957 TyD = Type;
3958 }
3959 }
3960 }
3961
3962 if (!TyD && BaseType.isNull()) {
3963 Diag(IdLoc, diag::err_mem_init_not_member_or_class)
3964 << MemberOrBase << SourceRange(IdLoc,Init->getSourceRange().getEnd());
3965 return true;
3966 }
3967 }
3968
3969 if (BaseType.isNull()) {
3970 BaseType = Context.getTypeDeclType(TyD);
3971 MarkAnyDeclReferenced(TyD->getLocation(), TyD, /*OdrUse=*/false);
3972 if (SS.isSet()) {
3973 BaseType = Context.getElaboratedType(ETK_None, SS.getScopeRep(),
3974 BaseType);
3975 TInfo = Context.CreateTypeSourceInfo(BaseType);
3976 ElaboratedTypeLoc TL = TInfo->getTypeLoc().castAs<ElaboratedTypeLoc>();
3977 TL.getNamedTypeLoc().castAs<TypeSpecTypeLoc>().setNameLoc(IdLoc);
3978 TL.setElaboratedKeywordLoc(SourceLocation());
3979 TL.setQualifierLoc(SS.getWithLocInContext(Context));
3980 }
3981 }
3982 }
3983
3984 if (!TInfo)
3985 TInfo = Context.getTrivialTypeSourceInfo(BaseType, IdLoc);
3986
3987 return BuildBaseInitializer(BaseType, TInfo, Init, ClassDecl, EllipsisLoc);
3988 }
3989
3990 MemInitResult
3991 Sema::BuildMemberInitializer(ValueDecl *Member, Expr *Init,
3992 SourceLocation IdLoc) {
3993 FieldDecl *DirectMember = dyn_cast<FieldDecl>(Member);
3994 IndirectFieldDecl *IndirectMember = dyn_cast<IndirectFieldDecl>(Member);
3995 assert((DirectMember || IndirectMember) &&
3996 "Member must be a FieldDecl or IndirectFieldDecl");
3997
3998 if (DiagnoseUnexpandedParameterPack(Init, UPPC_Initializer))
3999 return true;
4000
4001 if (Member->isInvalidDecl())
4002 return true;
4003
4004 MultiExprArg Args;
4005 if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
4006 Args = MultiExprArg(ParenList->getExprs(), ParenList->getNumExprs());
4007 } else if (InitListExpr *InitList = dyn_cast<InitListExpr>(Init)) {
4008 Args = MultiExprArg(InitList->getInits(), InitList->getNumInits());
4009 } else {
4010 // Template instantiation doesn't reconstruct ParenListExprs for us.
4011 Args = Init;
4012 }
4013
4014 SourceRange InitRange = Init->getSourceRange();
4015
4016 if (Member->getType()->isDependentType() || Init->isTypeDependent()) {
4017 // Can't check initialization for a member of dependent type or when
4018 // any of the arguments are type-dependent expressions.
4019 DiscardCleanupsInEvaluationContext();
4020 } else {
4021 bool InitList = false;
4022 if (isa<InitListExpr>(Init)) {
4023 InitList = true;
4024 Args = Init;
4025 }
4026
4027 // Initialize the member.
4028 InitializedEntity MemberEntity =
4029 DirectMember ? InitializedEntity::InitializeMember(DirectMember, nullptr)
4030 : InitializedEntity::InitializeMember(IndirectMember,
4031 nullptr);
4032 InitializationKind Kind =
4033 InitList ? InitializationKind::CreateDirectList(
4034 IdLoc, Init->getBeginLoc(), Init->getEndLoc())
4035 : InitializationKind::CreateDirect(IdLoc, InitRange.getBegin(),
4036 InitRange.getEnd());
4037
4038 InitializationSequence InitSeq(*this, MemberEntity, Kind, Args);
4039 ExprResult MemberInit = InitSeq.Perform(*this, MemberEntity, Kind, Args,
4040 nullptr);
4041 if (MemberInit.isInvalid())
4042 return true;
4043
4044 // C++11 [class.base.init]p7:
4045 // The initialization of each base and member constitutes a
4046 // full-expression.
4047 MemberInit = ActOnFinishFullExpr(MemberInit.get(), InitRange.getBegin(),
4048 /*DiscardedValue*/ false);
4049 if (MemberInit.isInvalid())
4050 return true;
4051
4052 Init = MemberInit.get();
4053 }
4054
4055 if (DirectMember) {
4056 return new (Context) CXXCtorInitializer(Context, DirectMember, IdLoc,
4057 InitRange.getBegin(), Init,
4058 InitRange.getEnd());
4059 } else {
4060 return new (Context) CXXCtorInitializer(Context, IndirectMember, IdLoc,
4061 InitRange.getBegin(), Init,
4062 InitRange.getEnd());
4063 }
4064 }
4065
4066 MemInitResult
4067 Sema::BuildDelegatingInitializer(TypeSourceInfo *TInfo, Expr *Init,
4068 CXXRecordDecl *ClassDecl) {
4069 SourceLocation NameLoc = TInfo->getTypeLoc().getLocalSourceRange().getBegin();
4070 if (!LangOpts.CPlusPlus11)
4071 return Diag(NameLoc, diag::err_delegating_ctor)
4072 << TInfo->getTypeLoc().getLocalSourceRange();
4073 Diag(NameLoc, diag::warn_cxx98_compat_delegating_ctor);
4074
4075 bool InitList = true;
4076 MultiExprArg Args = Init;
4077 if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
4078 InitList = false;
4079 Args = MultiExprArg(ParenList->getExprs(), ParenList->getNumExprs());
4080 }
4081
4082 SourceRange InitRange = Init->getSourceRange();
4083 // Initialize the object.
4084 InitializedEntity DelegationEntity = InitializedEntity::InitializeDelegation(
4085 QualType(ClassDecl->getTypeForDecl(), 0));
4086 InitializationKind Kind =
4087 InitList ? InitializationKind::CreateDirectList(
4088 NameLoc, Init->getBeginLoc(), Init->getEndLoc())
4089 : InitializationKind::CreateDirect(NameLoc, InitRange.getBegin(),
4090 InitRange.getEnd());
4091 InitializationSequence InitSeq(*this, DelegationEntity, Kind, Args);
4092 ExprResult DelegationInit = InitSeq.Perform(*this, DelegationEntity, Kind,
4093 Args, nullptr);
4094 if (DelegationInit.isInvalid())
4095 return true;
4096
4097 assert(cast<CXXConstructExpr>(DelegationInit.get())->getConstructor() &&
4098 "Delegating constructor with no target?");
4099
4100 // C++11 [class.base.init]p7:
4101 // The initialization of each base and member constitutes a
4102 // full-expression.
4103 DelegationInit = ActOnFinishFullExpr(
4104 DelegationInit.get(), InitRange.getBegin(), /*DiscardedValue*/ false);
4105 if (DelegationInit.isInvalid())
4106 return true;
4107
4108 // If we are in a dependent context, template instantiation will
4109 // perform this type-checking again. Just save the arguments that we
4110 // received in a ParenListExpr.
4111 // FIXME: This isn't quite ideal, since our ASTs don't capture all
4112 // of the information that we have about the base
4113 // initializer. However, deconstructing the ASTs is a dicey process,
4114 // and this approach is far more likely to get the corner cases right.
4115 if (CurContext->isDependentContext())
4116 DelegationInit = Init;
4117
4118 return new (Context) CXXCtorInitializer(Context, TInfo, InitRange.getBegin(),
4119 DelegationInit.getAs<Expr>(),
4120 InitRange.getEnd());
4121 }
4122
4123 MemInitResult
4124 Sema::BuildBaseInitializer(QualType BaseType, TypeSourceInfo *BaseTInfo,
4125 Expr *Init, CXXRecordDecl *ClassDecl,
4126 SourceLocation EllipsisLoc) {
4127 SourceLocation BaseLoc
4128 = BaseTInfo->getTypeLoc().getLocalSourceRange().getBegin();
4129
4130 if (!BaseType->isDependentType() && !BaseType->isRecordType())
4131 return Diag(BaseLoc, diag::err_base_init_does_not_name_class)
4132 << BaseType << BaseTInfo->getTypeLoc().getLocalSourceRange();
4133
4134 // C++ [class.base.init]p2:
4135 // [...] Unless the mem-initializer-id names a nonstatic data
4136 // member of the constructor's class or a direct or virtual base
4137 // of that class, the mem-initializer is ill-formed. A
4138 // mem-initializer-list can initialize a base class using any
4139 // name that denotes that base class type.
4140 bool Dependent = BaseType->isDependentType() || Init->isTypeDependent();
4141
4142 SourceRange InitRange = Init->getSourceRange();
4143 if (EllipsisLoc.isValid()) {
4144 // This is a pack expansion.
4145 if (!BaseType->containsUnexpandedParameterPack()) {
4146 Diag(EllipsisLoc, diag::err_pack_expansion_without_parameter_packs)
4147 << SourceRange(BaseLoc, InitRange.getEnd());
4148
4149 EllipsisLoc = SourceLocation();
4150 }
4151 } else {
4152 // Check for any unexpanded parameter packs.
4153 if (DiagnoseUnexpandedParameterPack(BaseLoc, BaseTInfo, UPPC_Initializer))
4154 return true;
4155
4156 if (DiagnoseUnexpandedParameterPack(Init, UPPC_Initializer))
4157 return true;
4158 }
4159
4160 // Check for direct and virtual base classes.
4161 const CXXBaseSpecifier *DirectBaseSpec = nullptr;
4162 const CXXBaseSpecifier *VirtualBaseSpec = nullptr;
4163 if (!Dependent) {
4164 if (Context.hasSameUnqualifiedType(QualType(ClassDecl->getTypeForDecl(),0),
4165 BaseType))
4166 return BuildDelegatingInitializer(BaseTInfo, Init, ClassDecl);
4167
4168 FindBaseInitializer(*this, ClassDecl, BaseType, DirectBaseSpec,
4169 VirtualBaseSpec);
4170
4171 // C++ [base.class.init]p2:
4172 // Unless the mem-initializer-id names a nonstatic data member of the
4173 // constructor's class or a direct or virtual base of that class, the
4174 // mem-initializer is ill-formed.
4175 if (!DirectBaseSpec && !VirtualBaseSpec) {
4176 // If the class has any dependent bases, then it's possible that
4177 // one of those types will resolve to the same type as
4178 // BaseType. Therefore, just treat this as a dependent base
4179 // class initialization. FIXME: Should we try to check the
4180 // initialization anyway? It seems odd.
4181 if (ClassDecl->hasAnyDependentBases())
4182 Dependent = true;
4183 else
4184 return Diag(BaseLoc, diag::err_not_direct_base_or_virtual)
4185 << BaseType << Context.getTypeDeclType(ClassDecl)
4186 << BaseTInfo->getTypeLoc().getLocalSourceRange();
4187 }
4188 }
4189
4190 if (Dependent) {
4191 DiscardCleanupsInEvaluationContext();
4192
4193 return new (Context) CXXCtorInitializer(Context, BaseTInfo,
4194 /*IsVirtual=*/false,
4195 InitRange.getBegin(), Init,
4196 InitRange.getEnd(), EllipsisLoc);
4197 }
4198
4199 // C++ [base.class.init]p2:
4200 // If a mem-initializer-id is ambiguous because it designates both
4201 // a direct non-virtual base class and an inherited virtual base
4202 // class, the mem-initializer is ill-formed.
4203 if (DirectBaseSpec && VirtualBaseSpec)
4204 return Diag(BaseLoc, diag::err_base_init_direct_and_virtual)
4205 << BaseType << BaseTInfo->getTypeLoc().getLocalSourceRange();
4206
4207 const CXXBaseSpecifier *BaseSpec = DirectBaseSpec;
4208 if (!BaseSpec)
4209 BaseSpec = VirtualBaseSpec;
4210
4211 // Initialize the base.
4212 bool InitList = true;
4213 MultiExprArg Args = Init;
4214 if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) {
4215 InitList = false;
4216 Args = MultiExprArg(ParenList->getExprs(), ParenList->getNumExprs());
4217 }
4218
4219 InitializedEntity BaseEntity =
4220 InitializedEntity::InitializeBase(Context, BaseSpec, VirtualBaseSpec);
4221 InitializationKind Kind =
4222 InitList ? InitializationKind::CreateDirectList(BaseLoc)
4223 : InitializationKind::CreateDirect(BaseLoc, InitRange.getBegin(),
4224 InitRange.getEnd());
4225 InitializationSequence InitSeq(*this, BaseEntity, Kind, Args);
4226 ExprResult BaseInit = InitSeq.Perform(*this, BaseEntity, Kind, Args, nullptr);
4227 if (BaseInit.isInvalid())
4228 return true;
4229
4230 // C++11 [class.base.init]p7:
4231 // The initialization of each base and member constitutes a
4232 // full-expression.
4233 BaseInit = ActOnFinishFullExpr(BaseInit.get(), InitRange.getBegin(),
4234 /*DiscardedValue*/ false);
4235 if (BaseInit.isInvalid())
4236 return true;
4237
4238 // If we are in a dependent context, template instantiation will
4239 // perform this type-checking again. Just save the arguments that we
4240 // received in a ParenListExpr.
4241 // FIXME: This isn't quite ideal, since our ASTs don't capture all
4242 // of the information that we have about the base
4243 // initializer. However, deconstructing the ASTs is a dicey process,
4244 // and this approach is far more likely to get the corner cases right.
4245 if (CurContext->isDependentContext())
4246 BaseInit = Init;
4247
4248 return new (Context) CXXCtorInitializer(Context, BaseTInfo,
4249 BaseSpec->isVirtual(),
4250 InitRange.getBegin(),
4251 BaseInit.getAs<Expr>(),
4252 InitRange.getEnd(), EllipsisLoc);
4253 }
4254
4255 // Create a static_cast<T&&>(expr).
4256 static Expr *CastForMoving(Sema &SemaRef, Expr *E, QualType T = QualType()) {
4257 if (T.isNull()) T = E->getType();
4258 QualType TargetType = SemaRef.BuildReferenceType(
4259 T, /*SpelledAsLValue*/false, SourceLocation(), DeclarationName());
4260 SourceLocation ExprLoc = E->getBeginLoc();
4261 TypeSourceInfo *TargetLoc = SemaRef.Context.getTrivialTypeSourceInfo(
4262 TargetType, ExprLoc);
4263
4264 return SemaRef.BuildCXXNamedCast(ExprLoc, tok::kw_static_cast, TargetLoc, E,
4265 SourceRange(ExprLoc, ExprLoc),
4266 E->getSourceRange()).get();
4267 }
4268
4269 /// ImplicitInitializerKind - How an implicit base or member initializer should
4270 /// initialize its base or member.
4271 enum ImplicitInitializerKind {
4272 IIK_Default,
4273 IIK_Copy,
4274 IIK_Move,
4275 IIK_Inherit
4276 };
4277
4278 static bool
4279 BuildImplicitBaseInitializer(Sema &SemaRef, CXXConstructorDecl *Constructor,
4280 ImplicitInitializerKind ImplicitInitKind,
4281 CXXBaseSpecifier *BaseSpec,
4282 bool IsInheritedVirtualBase,
4283 CXXCtorInitializer *&CXXBaseInit) {
4284 InitializedEntity InitEntity
4285 = InitializedEntity::InitializeBase(SemaRef.Context, BaseSpec,
4286 IsInheritedVirtualBase);
4287
4288 ExprResult BaseInit;
4289
4290 switch (ImplicitInitKind) {
4291 case IIK_Inherit:
4292 case IIK_Default: {
4293 InitializationKind InitKind
4294 = InitializationKind::CreateDefault(Constructor->getLocation());
4295 InitializationSequence InitSeq(SemaRef, InitEntity, InitKind, None);
4296 BaseInit = InitSeq.Perform(SemaRef, InitEntity, InitKind, None);
4297 break;
4298 }
4299
4300 case IIK_Move:
4301 case IIK_Copy: {
4302 bool Moving = ImplicitInitKind == IIK_Move;
4303 ParmVarDecl *Param = Constructor->getParamDecl(0);
4304 QualType ParamType = Param->getType().getNonReferenceType();
4305
4306 Expr *CopyCtorArg =
4307 DeclRefExpr::Create(SemaRef.Context, NestedNameSpecifierLoc(),
4308 SourceLocation(), Param, false,
4309 Constructor->getLocation(), ParamType,
4310 VK_LValue, nullptr);
4311
4312 SemaRef.MarkDeclRefReferenced(cast<DeclRefExpr>(CopyCtorArg));
4313
4314 // Cast to the base class to avoid ambiguities.
4315 QualType ArgTy =
4316 SemaRef.Context.getQualifiedType(BaseSpec->getType().getUnqualifiedType(),
4317 ParamType.getQualifiers());
4318
4319 if (Moving) {
4320 CopyCtorArg = CastForMoving(SemaRef, CopyCtorArg);
4321 }
4322
4323 CXXCastPath BasePath;
4324 BasePath.push_back(BaseSpec);
4325 CopyCtorArg = SemaRef.ImpCastExprToType(CopyCtorArg, ArgTy,
4326 CK_UncheckedDerivedToBase,
4327 Moving ? VK_XValue : VK_LValue,
4328 &BasePath).get();
4329
4330 InitializationKind InitKind
4331 = InitializationKind::CreateDirect(Constructor->getLocation(),
4332 SourceLocation(), SourceLocation());
4333 InitializationSequence InitSeq(SemaRef, InitEntity, InitKind, CopyCtorArg);
4334 BaseInit = InitSeq.Perform(SemaRef, InitEntity, InitKind, CopyCtorArg);
4335 break;
4336 }
4337 }
4338
4339 BaseInit = SemaRef.MaybeCreateExprWithCleanups(BaseInit);
4340 if (BaseInit.isInvalid())
4341 return true;
4342
4343 CXXBaseInit =
4344 new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context,
4345 SemaRef.Context.getTrivialTypeSourceInfo(BaseSpec->getType(),
4346 SourceLocation()),
4347 BaseSpec->isVirtual(),
4348 SourceLocation(),
4349 BaseInit.getAs<Expr>(),
4350 SourceLocation(),
4351 SourceLocation());
4352
4353 return false;
4354 }
4355
4356 static bool RefersToRValueRef(Expr *MemRef) {
4357 ValueDecl *Referenced = cast<MemberExpr>(MemRef)->getMemberDecl();
4358 return Referenced->getType()->isRValueReferenceType();
4359 }
4360
4361 static bool
4362 BuildImplicitMemberInitializer(Sema &SemaRef, CXXConstructorDecl *Constructor,
4363 ImplicitInitializerKind ImplicitInitKind,
4364 FieldDecl *Field, IndirectFieldDecl *Indirect,
4365 CXXCtorInitializer *&CXXMemberInit) {
4366 if (Field->isInvalidDecl())
4367 return true;
4368
4369 SourceLocation Loc = Constructor->getLocation();
4370
4371 if (ImplicitInitKind == IIK_Copy || ImplicitInitKind == IIK_Move) {
4372 bool Moving = ImplicitInitKind == IIK_Move;
4373 ParmVarDecl *Param = Constructor->getParamDecl(0);
4374 QualType ParamType = Param->getType().getNonReferenceType();
4375
4376 // Suppress copying zero-width bitfields.
4377 if (Field->isZeroLengthBitField(SemaRef.Context))
4378 return false;
4379
4380 Expr *MemberExprBase =
4381 DeclRefExpr::Create(SemaRef.Context, NestedNameSpecifierLoc(),
4382 SourceLocation(), Param, false,
4383 Loc, ParamType, VK_LValue, nullptr);
4384
4385 SemaRef.MarkDeclRefReferenced(cast<DeclRefExpr>(MemberExprBase));
4386
4387 if (Moving) {
4388 MemberExprBase = CastForMoving(SemaRef, MemberExprBase);
4389 }
4390
4391 // Build a reference to this field within the parameter.
4392 CXXScopeSpec SS;
4393 LookupResult MemberLookup(SemaRef, Field->getDeclName(), Loc,
4394 Sema::LookupMemberName);
4395 MemberLookup.addDecl(Indirect ? cast<ValueDecl>(Indirect)
4396 : cast<ValueDecl>(Field), AS_public);
4397 MemberLookup.resolveKind();
4398 ExprResult CtorArg
4399 = SemaRef.BuildMemberReferenceExpr(MemberExprBase,
4400 ParamType, Loc,
4401 /*IsArrow=*/false,
4402 SS,
4403 /*TemplateKWLoc=*/SourceLocation(),
4404 /*FirstQualifierInScope=*/nullptr,
4405 MemberLookup,
4406 /*TemplateArgs=*/nullptr,
4407 /*S*/nullptr);
4408 if (CtorArg.isInvalid())
4409 return true;
4410
4411 // C++11 [class.copy]p15:
4412 // - if a member m has rvalue reference type T&&, it is direct-initialized
4413 // with static_cast<T&&>(x.m);
4414 if (RefersToRValueRef(CtorArg.get())) {
4415 CtorArg = CastForMoving(SemaRef, CtorArg.get());
4416 }
4417
4418 InitializedEntity Entity =
4419 Indirect ? InitializedEntity::InitializeMember(Indirect, nullptr,
4420 /*Implicit*/ true)
4421 : InitializedEntity::InitializeMember(Field, nullptr,
4422 /*Implicit*/ true);
4423
4424 // Direct-initialize to use the copy constructor.
4425 InitializationKind InitKind =
4426 InitializationKind::CreateDirect(Loc, SourceLocation(), SourceLocation());
4427
4428 Expr *CtorArgE = CtorArg.getAs<Expr>();
4429 InitializationSequence InitSeq(SemaRef, Entity, InitKind, CtorArgE);
4430 ExprResult MemberInit =
4431 InitSeq.Perform(SemaRef, Entity, InitKind, MultiExprArg(&CtorArgE, 1));
4432 MemberInit = SemaRef.MaybeCreateExprWithCleanups(MemberInit);
4433 if (MemberInit.isInvalid())
4434 return true;
4435
4436 if (Indirect)
4437 CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer(
4438 SemaRef.Context, Indirect, Loc, Loc, MemberInit.getAs<Expr>(), Loc);
4439 else
4440 CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer(
4441 SemaRef.Context, Field, Loc, Loc, MemberInit.getAs<Expr>(), Loc);
4442 return false;
4443 }
4444
4445 assert((ImplicitInitKind == IIK_Default || ImplicitInitKind == IIK_Inherit) &&
4446 "Unhandled implicit init kind!");
4447
4448 QualType FieldBaseElementType =
4449 SemaRef.Context.getBaseElementType(Field->getType());
4450
4451 if (FieldBaseElementType->isRecordType()) {
4452 InitializedEntity InitEntity =
4453 Indirect ? InitializedEntity::InitializeMember(Indirect, nullptr,
4454 /*Implicit*/ true)
4455 : InitializedEntity::InitializeMember(Field, nullptr,
4456 /*Implicit*/ true);
4457 InitializationKind InitKind =
4458 InitializationKind::CreateDefault(Loc);
4459
4460 InitializationSequence InitSeq(SemaRef, InitEntity, InitKind, None);
4461 ExprResult MemberInit =
4462 InitSeq.Perform(SemaRef, InitEntity, InitKind, None);
4463
4464 MemberInit = SemaRef.MaybeCreateExprWithCleanups(MemberInit);
4465 if (MemberInit.isInvalid())
4466 return true;
4467
4468 if (Indirect)
4469 CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context,
4470 Indirect, Loc,
4471 Loc,
4472 MemberInit.get(),
4473 Loc);
4474 else
4475 CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context,
4476 Field, Loc, Loc,
4477 MemberInit.get(),
4478 Loc);
4479 return false;
4480 }
4481
4482 if (!Field->getParent()->isUnion()) {
4483 if (FieldBaseElementType->isReferenceType()) {
4484 SemaRef.Diag(Constructor->getLocation(),
4485 diag::err_uninitialized_member_in_ctor)
4486 << (int)Constructor->isImplicit()
4487 << SemaRef.Context.getTagDeclType(Constructor->getParent())
4488 << 0 << Field->getDeclName();
4489 SemaRef.Diag(Field->getLocation(), diag::note_declared_at);
4490 return true;
4491 }
4492
4493 if (FieldBaseElementType.isConstQualified()) {
4494 SemaRef.Diag(Constructor->getLocation(),
4495 diag::err_uninitialized_member_in_ctor)
4496 << (int)Constructor->isImplicit()
4497 << SemaRef.Context.getTagDeclType(Constructor->getParent())
4498 << 1 << Field->getDeclName();
4499 SemaRef.Diag(Field->getLocation(), diag::note_declared_at);
4500 return true;
4501 }
4502 }
4503
4504 if (FieldBaseElementType.hasNonTrivialObjCLifetime()) {
4505 // ARC and Weak:
4506 // Default-initialize Objective-C pointers to NULL.
4507 CXXMemberInit
4508 = new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context, Field,
4509 Loc, Loc,
4510 new (SemaRef.Context) ImplicitValueInitExpr(Field->getType()),
4511 Loc);
4512 return false;
4513 }
4514
4515 // Nothing to initialize.
4516 CXXMemberInit = nullptr;
4517 return false;
4518 }
4519
4520 namespace {
4521 struct BaseAndFieldInfo {
4522 Sema &S;
4523 CXXConstructorDecl *Ctor;
4524 bool AnyErrorsInInits;
4525 ImplicitInitializerKind IIK;
4526 llvm::DenseMap<const void *, CXXCtorInitializer*> AllBaseFields;
4527 SmallVector<CXXCtorInitializer*, 8> AllToInit;
4528 llvm::DenseMap<TagDecl*, FieldDecl*> ActiveUnionMember;
4529
4530 BaseAndFieldInfo(Sema &S, CXXConstructorDecl *Ctor, bool ErrorsInInits)
4531 : S(S), Ctor(Ctor), AnyErrorsInInits(ErrorsInInits) {
4532 bool Generated = Ctor->isImplicit() || Ctor->isDefaulted();
4533 if (Ctor->getInheritedConstructor())
4534 IIK = IIK_Inherit;
4535 else if (Generated && Ctor->isCopyConstructor())
4536 IIK = IIK_Copy;
4537 else if (Generated && Ctor->isMoveConstructor())
4538 IIK = IIK_Move;
4539 else
4540 IIK = IIK_Default;
4541 }
4542
4543 bool isImplicitCopyOrMove() const {
4544 switch (IIK) {
4545 case IIK_Copy:
4546 case IIK_Move:
4547 return true;
4548
4549 case IIK_Default:
4550 case IIK_Inherit:
4551 return false;
4552 }
4553
4554 llvm_unreachable("Invalid ImplicitInitializerKind!");
4555 }
4556
4557 bool addFieldInitializer(CXXCtorInitializer *Init) {
4558 AllToInit.push_back(Init);
4559
4560 // Check whether this initializer makes the field "used".
4561 if (Init->getInit()->HasSideEffects(S.Context))
4562 S.UnusedPrivateFields.remove(Init->getAnyMember());
4563
4564 return false;
4565 }
4566
4567 bool isInactiveUnionMember(FieldDecl *Field) {
4568 RecordDecl *Record = Field->getParent();
4569 if (!Record->isUnion())
4570 return false;
4571
4572 if (FieldDecl *Active =
4573 ActiveUnionMember.lookup(Record->getCanonicalDecl()))
4574 return Active != Field->getCanonicalDecl();
4575
4576 // In an implicit copy or move constructor, ignore any in-class initializer.
4577 if (isImplicitCopyOrMove())
4578 return true;
4579
4580 // If there's no explicit initialization, the field is active only if it
4581 // has an in-class initializer...
4582 if (Field->hasInClassInitializer())
4583 return false;
4584 // ... or it's an anonymous struct or union whose class has an in-class
4585 // initializer.
4586 if (!Field->isAnonymousStructOrUnion())
4587 return true;
4588 CXXRecordDecl *FieldRD = Field->getType()->getAsCXXRecordDecl();
4589 return !FieldRD->hasInClassInitializer();
4590 }
4591
4592 /// Determine whether the given field is, or is within, a union member
4593 /// that is inactive (because there was an initializer given for a different
4594 /// member of the union, or because the union was not initialized at all).
4595 bool isWithinInactiveUnionMember(FieldDecl *Field,
4596 IndirectFieldDecl *Indirect) {
4597 if (!Indirect)
4598 return isInactiveUnionMember(Field);
4599
4600 for (auto *C : Indirect->chain()) {
4601 FieldDecl *Field = dyn_cast<FieldDecl>(C);
4602 if (Field && isInactiveUnionMember(Field))
4603 return true;
4604 }
4605 return false;
4606 }
4607 };
4608 }
4609
4610 /// Determine whether the given type is an incomplete or zero-lenfgth
4611 /// array type.
4612 static bool isIncompleteOrZeroLengthArrayType(ASTContext &Context, QualType T) {
4613 if (T->isIncompleteArrayType())
4614 return true;
4615
4616 while (const ConstantArrayType *ArrayT = Context.getAsConstantArrayType(T)) {
4617 if (!ArrayT->getSize())
4618 return true;
4619
4620 T = ArrayT->getElementType();
4621 }
4622
4623 return false;
4624 }
4625
4626 static bool CollectFieldInitializer(Sema &SemaRef, BaseAndFieldInfo &Info,
4627 FieldDecl *Field,
4628 IndirectFieldDecl *Indirect = nullptr) {
4629 if (Field->isInvalidDecl())
4630 return false;
4631
4632 // Overwhelmingly common case: we have a direct initializer for this field.
4633 if (CXXCtorInitializer *Init =
4634 Info.AllBaseFields.lookup(Field->getCanonicalDecl()))
4635 return Info.addFieldInitializer(Init);
4636
4637 // C++11 [class.base.init]p8:
4638 // if the entity is a non-static data member that has a
4639 // brace-or-equal-initializer and either
4640 // -- the constructor's class is a union and no other variant member of that
4641 // union is designated by a mem-initializer-id or
4642 // -- the constructor's class is not a union, and, if the entity is a member
4643 // of an anonymous union, no other member of that union is designated by
4644 // a mem-initializer-id,
4645 // the entity is initialized as specified in [dcl.init].
4646 //
4647 // We also apply the same rules to handle anonymous structs within anonymous
4648 // unions.
4649 if (Info.isWithinInactiveUnionMember(Field, Indirect))
4650 return false;
4651
4652 if (Field->hasInClassInitializer() && !Info.isImplicitCopyOrMove()) {
4653 ExprResult DIE =
4654 SemaRef.BuildCXXDefaultInitExpr(Info.Ctor->getLocation(), Field);
4655 if (DIE.isInvalid())
4656 return true;
4657
4658 auto Entity = InitializedEntity::InitializeMember(Field, nullptr, true);
4659 SemaRef.checkInitializerLifetime(Entity, DIE.get());
4660
4661 CXXCtorInitializer *Init;
4662 if (Indirect)
4663 Init = new (SemaRef.Context)
4664 CXXCtorInitializer(SemaRef.Context, Indirect, SourceLocation(),
4665 SourceLocation(), DIE.get(), SourceLocation());
4666 else
4667 Init = new (SemaRef.Context)
4668 CXXCtorInitializer(SemaRef.Context, Field, SourceLocation(),
4669 SourceLocation(), DIE.get(), SourceLocation());
4670 return Info.addFieldInitializer(Init);
4671 }
4672
4673 // Don't initialize incomplete or zero-length arrays.
4674 if (isIncompleteOrZeroLengthArrayType(SemaRef.Context, Field->getType()))
4675 return false;
4676
4677 // Don't try to build an implicit initializer if there were semantic
4678 // errors in any of the initializers (and therefore we might be
4679 // missing some that the user actually wrote).
4680 if (Info.AnyErrorsInInits)
4681 return false;
4682
4683 CXXCtorInitializer *Init = nullptr;
4684 if (BuildImplicitMemberInitializer(Info.S, Info.Ctor, Info.IIK, Field,
4685 Indirect, Init))
4686 return true;
4687
4688 if (!Init)
4689 return false;
4690
4691 return Info.addFieldInitializer(Init);
4692 }
4693
4694 bool
4695 Sema::SetDelegatingInitializer(CXXConstructorDecl *Constructor,
4696 CXXCtorInitializer *Initializer) {
4697 assert(Initializer->isDelegatingInitializer());
4698 Constructor->setNumCtorInitializers(1);
4699 CXXCtorInitializer **initializer =
4700 new (Context) CXXCtorInitializer*[1];
4701 memcpy(initializer, &Initializer, sizeof (CXXCtorInitializer*));
4702 Constructor->setCtorInitializers(initializer);
4703
4704 if (CXXDestructorDecl *Dtor = LookupDestructor(Constructor->getParent())) {
4705 MarkFunctionReferenced(Initializer->getSourceLocation(), Dtor);
4706 DiagnoseUseOfDecl(Dtor, Initializer->getSourceLocation());
4707 }
4708
4709 DelegatingCtorDecls.push_back(Constructor);
4710
4711 DiagnoseUninitializedFields(*this, Constructor);
4712
4713 return false;
4714 }
4715
4716 bool Sema::SetCtorInitializers(CXXConstructorDecl *Constructor, bool AnyErrors,
4717 ArrayRef<CXXCtorInitializer *> Initializers) {
4718 if (Constructor->isDependentContext()) {
4719 // Just store the initializers as written, they will be checked during
4720 // instantiation.
4721 if (!Initializers.empty()) {
4722 Constructor->setNumCtorInitializers(Initializers.size());
4723 CXXCtorInitializer **baseOrMemberInitializers =
4724 new (Context) CXXCtorInitializer*[Initializers.size()];
4725 memcpy(baseOrMemberInitializers, Initializers.data(),
4726 Initializers.size() * sizeof(CXXCtorInitializer*));
4727 Constructor->setCtorInitializers(baseOrMemberInitializers);
4728 }
4729
4730 // Let template instantiation know whether we had errors.
4731 if (AnyErrors)
4732 Constructor->setInvalidDecl();
4733
4734 return false;
4735 }
4736
4737 BaseAndFieldInfo Info(*this, Constructor, AnyErrors);
4738
4739 // We need to build the initializer AST according to order of construction
4740 // and not what user specified in the Initializers list.
4741 CXXRecordDecl *ClassDecl = Constructor->getParent()->getDefinition();
4742 if (!ClassDecl)
4743 return true;
4744
4745 bool HadError = false;
4746
4747 for (unsigned i = 0; i < Initializers.size(); i++) {
4748 CXXCtorInitializer *Member = Initializers[i];
4749
4750 if (Member->isBaseInitializer())
4751 Info.AllBaseFields[Member->getBaseClass()->getAs<RecordType>()] = Member;
4752 else {
4753 Info.AllBaseFields[Member->getAnyMember()->getCanonicalDecl()] = Member;
4754
4755 if (IndirectFieldDecl *F = Member->getIndirectMember()) {
4756 for (auto *C : F->chain()) {
4757 FieldDecl *FD = dyn_cast<FieldDecl>(C);
4758 if (FD && FD->getParent()->isUnion())
4759 Info.ActiveUnionMember.insert(std::make_pair(
4760 FD->getParent()->getCanonicalDecl(), FD->getCanonicalDecl()));
4761 }
4762 } else if (FieldDecl *FD = Member->getMember()) {
4763 if (FD->getParent()->isUnion())
4764 Info.ActiveUnionMember.insert(std::make_pair(
4765 FD->getParent()->getCanonicalDecl(), FD->getCanonicalDecl()));
4766 }
4767 }
4768 }
4769
4770 // Keep track of the direct virtual bases.
4771 llvm::SmallPtrSet<CXXBaseSpecifier *, 16> DirectVBases;
4772 for (auto &I : ClassDecl->bases()) {
4773 if (I.isVirtual())
4774 DirectVBases.insert(&I);
4775 }
4776
4777 // Push virtual bases before others.
4778 for (auto &VBase : ClassDecl->vbases()) {
4779 if (CXXCtorInitializer *Value
4780 = Info.AllBaseFields.lookup(VBase.getType()->getAs<RecordType>())) {
4781 // [class.base.init]p7, per DR257:
4782 // A mem-initializer where the mem-initializer-id names a virtual base
4783 // class is ignored during execution of a constructor of any class that
4784 // is not the most derived class.
4785 if (ClassDecl->isAbstract()) {
4786 // FIXME: Provide a fixit to remove the base specifier. This requires
4787 // tracking the location of the associated comma for a base specifier.
4788 Diag(Value->getSourceLocation(), diag::warn_abstract_vbase_init_ignored)
4789 << VBase.getType() << ClassDecl;
4790 DiagnoseAbstractType(ClassDecl);
4791 }
4792
4793 Info.AllToInit.push_back(Value);
4794 } else if (!AnyErrors && !ClassDecl->isAbstract()) {
4795 // [class.base.init]p8, per DR257:
4796 // If a given [...] base class is not named by a mem-initializer-id
4797 // [...] and the entity is not a virtual base class of an abstract
4798 // class, then [...] the entity is default-initialized.
4799 bool IsInheritedVirtualBase = !DirectVBases.count(&VBase);
4800 CXXCtorInitializer *CXXBaseInit;
4801 if (BuildImplicitBaseInitializer(*this, Constructor, Info.IIK,
4802 &VBase, IsInheritedVirtualBase,
4803 CXXBaseInit)) {
4804 HadError = true;
4805 continue;
4806 }
4807
4808 Info.AllToInit.push_back(CXXBaseInit);
4809 }
4810 }
4811
4812 // Non-virtual bases.
4813 for (auto &Base : ClassDecl->bases()) {
4814 // Virtuals are in the virtual base list and already constructed.
4815 if (Base.isVirtual())
4816 continue;
4817
4818 if (CXXCtorInitializer *Value
4819 = Info.AllBaseFields.lookup(Base.getType()->getAs<RecordType>())) {
4820 Info.AllToInit.push_back(Value);
4821 } else if (!AnyErrors) {
4822 CXXCtorInitializer *CXXBaseInit;
4823 if (BuildImplicitBaseInitializer(*this, Constructor, Info.IIK,
4824 &Base, /*IsInheritedVirtualBase=*/false,
4825 CXXBaseInit)) {
4826 HadError = true;
4827 continue;
4828 }
4829
4830 Info.AllToInit.push_back(CXXBaseInit);
4831 }
4832 }
4833
4834 // Fields.
4835 for (auto *Mem : ClassDecl->decls()) {
4836 if (auto *F = dyn_cast<FieldDecl>(Mem)) {
4837 // C++ [class.bit]p2:
4838 // A declaration for a bit-field that omits the identifier declares an
4839 // unnamed bit-field. Unnamed bit-fields are not members and cannot be
4840 // initialized.
4841 if (F->isUnnamedBitfield())
4842 continue;
4843
4844 // If we're not generating the implicit copy/move constructor, then we'll
4845 // handle anonymous struct/union fields based on their individual
4846 // indirect fields.
4847 if (F->isAnonymousStructOrUnion() && !Info.isImplicitCopyOrMove())
4848 continue;
4849
4850 if (CollectFieldInitializer(*this, Info, F))
4851 HadError = true;
4852 continue;
4853 }
4854
4855 // Beyond this point, we only consider default initialization.
4856 if (Info.isImplicitCopyOrMove())
4857 continue;
4858
4859 if (auto *F = dyn_cast<IndirectFieldDecl>(Mem)) {
4860 if (F->getType()->isIncompleteArrayType()) {
4861 assert(ClassDecl->hasFlexibleArrayMember() &&
4862 "Incomplete array type is not valid");
4863 continue;
4864 }
4865
4866 // Initialize each field of an anonymous struct individually.
4867 if (CollectFieldInitializer(*this, Info, F->getAnonField(), F))
4868 HadError = true;
4869
4870 continue;
4871 }
4872 }
4873
4874 unsigned NumInitializers = Info.AllToInit.size();
4875 if (NumInitializers > 0) {
4876 Constructor->setNumCtorInitializers(NumInitializers);
4877 CXXCtorInitializer **baseOrMemberInitializers =
4878 new (Context) CXXCtorInitializer*[NumInitializers];
4879 memcpy(baseOrMemberInitializers, Info.AllToInit.data(),
4880 NumInitializers * sizeof(CXXCtorInitializer*));
4881 Constructor->setCtorInitializers(baseOrMemberInitializers);
4882
4883 // Constructors implicitly reference the base and member
4884 // destructors.
4885 MarkBaseAndMemberDestructorsReferenced(Constructor->getLocation(),
4886 Constructor->getParent());
4887 }
4888
4889 return HadError;
4890 }
4891
4892 static void PopulateKeysForFields(FieldDecl *Field, SmallVectorImpl<const void*> &IdealInits) {
4893 if (const RecordType *RT = Field->getType()->getAs<RecordType>()) {
4894 const RecordDecl *RD = RT->getDecl();
4895 if (RD->isAnonymousStructOrUnion()) {
4896 for (auto *Field : RD->fields())
4897 PopulateKeysForFields(Field, IdealInits);
4898 return;
4899 }
4900 }
4901 IdealInits.push_back(Field->getCanonicalDecl());
4902 }
4903
4904 static const void *GetKeyForBase(ASTContext &Context, QualType BaseType) {
4905 return Context.getCanonicalType(BaseType).getTypePtr();
4906 }
4907
4908 static const void *GetKeyForMember(ASTContext &Context,
4909 CXXCtorInitializer *Member) {
4910 if (!Member->isAnyMemberInitializer())
4911 return GetKeyForBase(Context, QualType(Member->getBaseClass(), 0));
4912
4913 return Member->getAnyMember()->getCanonicalDecl();
4914 }
4915
4916 static void DiagnoseBaseOrMemInitializerOrder(
4917 Sema &SemaRef, const CXXConstructorDecl *Constructor,
4918 ArrayRef<CXXCtorInitializer *> Inits) {
4919 if (Constructor->getDeclContext()->isDependentContext())
4920 return;
4921
4922 // Don't check initializers order unless the warning is enabled at the
4923 // location of at least one initializer.
4924 bool ShouldCheckOrder = false;
4925 for (unsigned InitIndex = 0; InitIndex != Inits.size(); ++InitIndex) {
4926 CXXCtorInitializer *Init = Inits[InitIndex];
4927 if (!SemaRef.Diags.isIgnored(diag::warn_initializer_out_of_order,
4928 Init->getSourceLocation())) {
4929 ShouldCheckOrder = true;
4930 break;
4931 }
4932 }
4933 if (!ShouldCheckOrder)
4934 return;
4935
4936 // Build the list of bases and members in the order that they'll
4937 // actually be initialized. The explicit initializers should be in
4938 // this same order but may be missing things.
4939 SmallVector<const void*, 32> IdealInitKeys;
4940
4941 const CXXRecordDecl *ClassDecl = Constructor->getParent();
4942
4943 // 1. Virtual bases.
4944 for (const auto &VBase : ClassDecl->vbases())
4945 IdealInitKeys.push_back(GetKeyForBase(SemaRef.Context, VBase.getType()));
4946
4947 // 2. Non-virtual bases.
4948 for (const auto &Base : ClassDecl->bases()) {
4949 if (Base.isVirtual())
4950 continue;
4951 IdealInitKeys.push_back(GetKeyForBase(SemaRef.Context, Base.getType()));
4952 }
4953
4954 // 3. Direct fields.
4955 for (auto *Field : ClassDecl->fields()) {
4956 if (Field->isUnnamedBitfield())
4957 continue;
4958
4959 PopulateKeysForFields(Field, IdealInitKeys);
4960 }
4961
4962 unsigned NumIdealInits = IdealInitKeys.size();
4963 unsigned IdealIndex = 0;
4964
4965 CXXCtorInitializer *PrevInit = nullptr;
4966 for (unsigned InitIndex = 0; InitIndex != Inits.size(); ++InitIndex) {
4967 CXXCtorInitializer *Init = Inits[InitIndex];
4968 const void *InitKey = GetKeyForMember(SemaRef.Context, Init);
4969
4970 // Scan forward to try to find this initializer in the idealized
4971 // initializers list.
4972 for (; IdealIndex != NumIdealInits; ++IdealIndex)
4973 if (InitKey == IdealInitKeys[IdealIndex])
4974 break;
4975
4976 // If we didn't find this initializer, it must be because we
4977 // scanned past it on a previous iteration. That can only
4978 // happen if we're out of order; emit a warning.
4979 if (IdealIndex == NumIdealInits && PrevInit) {
4980 Sema::SemaDiagnosticBuilder D =
4981 SemaRef.Diag(PrevInit->getSourceLocation(),
4982 diag::warn_initializer_out_of_order);
4983
4984 if (PrevInit->isAnyMemberInitializer())
4985 D << 0 << PrevInit->getAnyMember()->getDeclName();
4986 else
4987 D << 1 << PrevInit->getTypeSourceInfo()->getType();
4988
4989 if (Init->isAnyMemberInitializer())
4990 D << 0 << Init->getAnyMember()->getDeclName();
4991 else
4992 D << 1 << Init->getTypeSourceInfo()->getType();
4993
4994 // Move back to the initializer's location in the ideal list.
4995 for (IdealIndex = 0; IdealIndex != NumIdealInits; ++IdealIndex)
4996 if (InitKey == IdealInitKeys[IdealIndex])
4997 break;
4998
4999 assert(IdealIndex < NumIdealInits &&
5000 "initializer not found in initializer list");
5001 }
5002
5003 PrevInit = Init;
5004 }
5005 }
5006
5007 namespace {
5008 bool CheckRedundantInit(Sema &S,
5009 CXXCtorInitializer *Init,
5010 CXXCtorInitializer *&PrevInit) {
5011 if (!PrevInit) {
5012 PrevInit = Init;
5013 return false;
5014 }
5015
5016 if (FieldDecl *Field = Init->getAnyMember())
5017 S.Diag(Init->getSourceLocation(),
5018 diag::err_multiple_mem_initialization)
5019 << Field->getDeclName()
5020 << Init->getSourceRange();
5021 else {
5022 const Type *BaseClass = Init->getBaseClass();
5023 assert(BaseClass && "neither field nor base");
5024 S.Diag(Init->getSourceLocation(),
5025 diag::err_multiple_base_initialization)
5026 << QualType(BaseClass, 0)
5027 << Init->getSourceRange();
5028 }
5029 S.Diag(PrevInit->getSourceLocation(), diag::note_previous_initializer)
5030 << 0 << PrevInit->getSourceRange();
5031
5032 return true;
5033 }
5034
5035 typedef std::pair<NamedDecl *, CXXCtorInitializer *> UnionEntry;
5036 typedef llvm::DenseMap<RecordDecl*, UnionEntry> RedundantUnionMap;
5037
5038 bool CheckRedundantUnionInit(Sema &S,
5039 CXXCtorInitializer *Init,
5040 RedundantUnionMap &Unions) {
5041 FieldDecl *Field = Init->getAnyMember();
5042 RecordDecl *Parent = Field->getParent();
5043 NamedDecl *Child = Field;
5044
5045 while (Parent->isAnonymousStructOrUnion() || Parent->isUnion()) {
5046 if (Parent->isUnion()) {
5047 UnionEntry &En = Unions[Parent];
5048 if (En.first && En.first != Child) {
5049 S.Diag(Init->getSourceLocation(),
5050 diag::err_multiple_mem_union_initialization)
5051 << Field->getDeclName()
5052 << Init->getSourceRange();
5053 S.Diag(En.second->getSourceLocation(), diag::note_previous_initializer)
5054 << 0 << En.second->getSourceRange();
5055 return true;
5056 }
5057 if (!En.first) {
5058 En.first = Child;
5059 En.second = Init;
5060 }
5061 if (!Parent->isAnonymousStructOrUnion())
5062 return false;
5063 }
5064
5065 Child = Parent;
5066 Parent = cast<RecordDecl>(Parent->getDeclContext());
5067 }
5068
5069 return false;
5070 }
5071 }
5072
5073 /// ActOnMemInitializers - Handle the member initializers for a constructor.
5074 void Sema::ActOnMemInitializers(Decl *ConstructorDecl,
5075 SourceLocation ColonLoc,
5076 ArrayRef<CXXCtorInitializer*> MemInits,
5077 bool AnyErrors) {
5078 if (!ConstructorDecl)
5079 return;
5080
5081 AdjustDeclIfTemplate(ConstructorDecl);
5082
5083 CXXConstructorDecl *Constructor
5084 = dyn_cast<CXXConstructorDecl>(ConstructorDecl);
5085
5086 if (!Constructor) {
5087 Diag(ColonLoc, diag::err_only_constructors_take_base_inits);
5088 return;
5089 }
5090
5091 // Mapping for the duplicate initializers check.
5092 // For member initializers, this is keyed with a FieldDecl*.
5093 // For base initializers, this is keyed with a Type*.
5094 llvm::DenseMap<const void *, CXXCtorInitializer *> Members;
5095
5096 // Mapping for the inconsistent anonymous-union initializers check.
5097 RedundantUnionMap MemberUnions;
5098
5099 bool HadError = false;
5100 for (unsigned i = 0; i < MemInits.size(); i++) {
5101 CXXCtorInitializer *Init = MemInits[i];
5102
5103 // Set the source order index.
5104 Init->setSourceOrder(i);
5105
5106 if (Init->isAnyMemberInitializer()) {
5107 const void *Key = GetKeyForMember(Context, Init);
5108 if (CheckRedundantInit(*this, Init, Members[Key]) ||
5109 CheckRedundantUnionInit(*this, Init, MemberUnions))
5110 HadError = true;
5111 } else if (Init->isBaseInitializer()) {
5112 const void *Key = GetKeyForMember(Context, Init);
5113 if (CheckRedundantInit(*this, Init, Members[Key]))
5114 HadError = true;
5115 } else {
5116 assert(Init->isDelegatingInitializer());
5117 // This must be the only initializer
5118 if (MemInits.size() != 1) {
5119 Diag(Init->getSourceLocation(),
5120 diag::err_delegating_initializer_alone)
5121 << Init->getSourceRange() << MemInits[i ? 0 : 1]->getSourceRange();
5122 // We will treat this as being the only initializer.
5123 }
5124 SetDelegatingInitializer(Constructor, MemInits[i]);
5125 // Return immediately as the initializer is set.
5126 return;
5127 }
5128 }
5129
5130 if (HadError)
5131 return;
5132
5133 DiagnoseBaseOrMemInitializerOrder(*this, Constructor, MemInits);
5134
5135 SetCtorInitializers(Constructor, AnyErrors, MemInits);
5136
5137 DiagnoseUninitializedFields(*this, Constructor);
5138 }
5139
5140 void
5141 Sema::MarkBaseAndMemberDestructorsReferenced(SourceLocation Location,
5142 CXXRecordDecl *ClassDecl) {
5143 // Ignore dependent contexts. Also ignore unions, since their members never
5144 // have destructors implicitly called.
5145 if (ClassDecl->isDependentContext() || ClassDecl->isUnion())
5146 return;
5147
5148 // FIXME: all the access-control diagnostics are positioned on the
5149 // field/base declaration. That's probably good; that said, the
5150 // user might reasonably want to know why the destructor is being
5151 // emitted, and we currently don't say.
5152
5153 // Non-static data members.
5154 for (auto *Field : ClassDecl->fields()) {
5155 if (Field->isInvalidDecl())
5156 continue;
5157
5158 // Don't destroy incomplete or zero-length arrays.
5159 if (isIncompleteOrZeroLengthArrayType(Context, Field->getType()))
5160 continue;
5161
5162 QualType FieldType = Context.getBaseElementType(Field->getType());
5163
5164 const RecordType* RT = FieldType->getAs<RecordType>();
5165 if (!RT)
5166 continue;
5167
5168 CXXRecordDecl *FieldClassDecl = cast<CXXRecordDecl>(RT->getDecl());
5169 if (FieldClassDecl->isInvalidDecl())
5170 continue;
5171 if (FieldClassDecl->hasIrrelevantDestructor())
5172 continue;
5173 // The destructor for an implicit anonymous union member is never invoked.
5174 if (FieldClassDecl->isUnion() && FieldClassDecl->isAnonymousStructOrUnion())
5175 continue;
5176
5177 CXXDestructorDecl *Dtor = LookupDestructor(FieldClassDecl);
5178 assert(Dtor && "No dtor found for FieldClassDecl!");
5179 CheckDestructorAccess(Field->getLocation(), Dtor,
5180 PDiag(diag::err_access_dtor_field)
5181 << Field->getDeclName()
5182 << FieldType);
5183
5184 MarkFunctionReferenced(Location, Dtor);
5185 DiagnoseUseOfDecl(Dtor, Location);
5186 }
5187
5188 // We only potentially invoke the destructors of potentially constructed
5189 // subobjects.
5190 bool VisitVirtualBases = !ClassDecl->isAbstract();
5191
5192 llvm::SmallPtrSet<const RecordType *, 8> DirectVirtualBases;
5193
5194 // Bases.
5195 for (const auto &Base : ClassDecl->bases()) {
5196 // Bases are always records in a well-formed non-dependent class.
5197 const RecordType *RT = Base.getType()->getAs<RecordType>();
5198
5199 // Remember direct virtual bases.
5200 if (Base.isVirtual()) {
5201 if (!VisitVirtualBases)
5202 continue;
5203 DirectVirtualBases.insert(RT);
5204 }
5205
5206 CXXRecordDecl *BaseClassDecl = cast<CXXRecordDecl>(RT->getDecl());
5207 // If our base class is invalid, we probably can't get its dtor anyway.
5208 if (BaseClassDecl->isInvalidDecl())
5209 continue;
5210 if (BaseClassDecl->hasIrrelevantDestructor())
5211 continue;
5212
5213 CXXDestructorDecl *Dtor = LookupDestructor(BaseClassDecl);
5214 assert(Dtor && "No dtor found for BaseClassDecl!");
5215
5216 // FIXME: caret should be on the start of the class name
5217 CheckDestructorAccess(Base.getBeginLoc(), Dtor,
5218 PDiag(diag::err_access_dtor_base)
5219 << Base.getType() << Base.getSourceRange(),
5220 Context.getTypeDeclType(ClassDecl));
5221
5222 MarkFunctionReferenced(Location, Dtor);
5223 DiagnoseUseOfDecl(Dtor, Location);
5224 }
5225
5226 if (!VisitVirtualBases)
5227 return;
5228
5229 // Virtual bases.
5230 for (const auto &VBase : ClassDecl->vbases()) {
5231 // Bases are always records in a well-formed non-dependent class.
5232 const RecordType *RT = VBase.getType()->castAs<RecordType>();
5233
5234 // Ignore direct virtual bases.
5235 if (DirectVirtualBases.count(RT))
5236 continue;
5237
5238 CXXRecordDecl *BaseClassDecl = cast<CXXRecordDecl>(RT->getDecl());
5239 // If our base class is invalid, we probably can't get its dtor anyway.
5240 if (BaseClassDecl->isInvalidDecl())
5241 continue;
5242 if (BaseClassDecl->hasIrrelevantDestructor())
5243 continue;
5244
5245 CXXDestructorDecl *Dtor = LookupDestructor(BaseClassDecl);
5246 assert(Dtor && "No dtor found for BaseClassDecl!");
5247 if (CheckDestructorAccess(
5248 ClassDecl->getLocation(), Dtor,
5249 PDiag(diag::err_access_dtor_vbase)
5250 << Context.getTypeDeclType(ClassDecl) << VBase.getType(),
5251 Context.getTypeDeclType(ClassDecl)) ==
5252 AR_accessible) {
5253 CheckDerivedToBaseConversion(
5254 Context.getTypeDeclType(ClassDecl), VBase.getType(),
5255 diag::err_access_dtor_vbase, 0, ClassDecl->getLocation(),
5256 SourceRange(), DeclarationName(), nullptr);
5257 }
5258
5259 MarkFunctionReferenced(Location, Dtor);
5260 DiagnoseUseOfDecl(Dtor, Location);
5261 }
5262 }
5263
5264 void Sema::ActOnDefaultCtorInitializers(Decl *CDtorDecl) {
5265 if (!CDtorDecl)
5266 return;
5267
5268 if (CXXConstructorDecl *Constructor
5269 = dyn_cast<CXXConstructorDecl>(CDtorDecl)) {
5270 SetCtorInitializers(Constructor, /*AnyErrors=*/false);
5271 DiagnoseUninitializedFields(*this, Constructor);
5272 }
5273 }
5274
5275 bool Sema::isAbstractType(SourceLocation Loc, QualType T) {
5276 if (!getLangOpts().CPlusPlus)
5277 return false;
5278
5279 const auto *RD = Context.getBaseElementType(T)->getAsCXXRecordDecl();
5280 if (!RD)
5281 return false;
5282
5283 // FIXME: Per [temp.inst]p1, we are supposed to trigger instantiation of a
5284 // class template specialization here, but doing so breaks a lot of code.
5285
5286 // We can't answer whether something is abstract until it has a
5287 // definition. If it's currently being defined, we'll walk back
5288 // over all the declarations when we have a full definition.
5289 const CXXRecordDecl *Def = RD->getDefinition();
5290 if (!Def || Def->isBeingDefined())
5291 return false;
5292
5293 return RD->isAbstract();
5294 }
5295
5296 bool Sema::RequireNonAbstractType(SourceLocation Loc, QualType T,
5297 TypeDiagnoser &Diagnoser) {
5298 if (!isAbstractType(Loc, T))
5299 return false;
5300
5301 T = Context.getBaseElementType(T);
5302 Diagnoser.diagnose(*this, Loc, T);
5303 DiagnoseAbstractType(T->getAsCXXRecordDecl());
5304 return true;
5305 }
5306
5307 void Sema::DiagnoseAbstractType(const CXXRecordDecl *RD) {
5308 // Check if we've already emitted the list of pure virtual functions
5309 // for this class.
5310 if (PureVirtualClassDiagSet && PureVirtualClassDiagSet->count(RD))
5311 return;
5312
5313 // If the diagnostic is suppressed, don't emit the notes. We're only
5314 // going to emit them once, so try to attach them to a diagnostic we're
5315 // actually going to show.
5316 if (Diags.isLastDiagnosticIgnored())
5317 return;
5318
5319 CXXFinalOverriderMap FinalOverriders;
5320 RD->getFinalOverriders(FinalOverriders);
5321
5322 // Keep a set of seen pure methods so we won't diagnose the same method
5323 // more than once.
5324 llvm::SmallPtrSet<const CXXMethodDecl *, 8> SeenPureMethods;
5325
5326 for (CXXFinalOverriderMap::iterator M = FinalOverriders.begin(),
5327 MEnd = FinalOverriders.end();
5328 M != MEnd;
5329 ++M) {
5330 for (OverridingMethods::iterator SO = M->second.begin(),
5331 SOEnd = M->second.end();
5332 SO != SOEnd; ++SO) {
5333 // C++ [class.abstract]p4:
5334 // A class is abstract if it contains or inherits at least one
5335 // pure virtual function for which the final overrider is pure
5336 // virtual.
5337
5338 //
5339 if (SO->second.size() != 1)
5340 continue;
5341
5342 if (!SO->second.front().Method->isPure())
5343 continue;
5344
5345 if (!SeenPureMethods.insert(SO->second.front().Method).second)
5346 continue;
5347
5348 Diag(SO->second.front().Method->getLocation(),
5349 diag::note_pure_virtual_function)
5350 << SO->second.front().Method->getDeclName() << RD->getDeclName();
5351 }
5352 }
5353
5354 if (!PureVirtualClassDiagSet)
5355 PureVirtualClassDiagSet.reset(new RecordDeclSetTy);
5356 PureVirtualClassDiagSet->insert(RD);
5357 }
5358
5359 namespace {
5360 struct AbstractUsageInfo {
5361 Sema &S;
5362 CXXRecordDecl *Record;
5363 CanQualType AbstractType;
5364 bool Invalid;
5365
5366 AbstractUsageInfo(Sema &S, CXXRecordDecl *Record)
5367 : S(S), Record(Record),
5368 AbstractType(S.Context.getCanonicalType(
5369 S.Context.getTypeDeclType(Record))),
5370 Invalid(false) {}
5371
5372 void DiagnoseAbstractType() {
5373 if (Invalid) return;
5374 S.DiagnoseAbstractType(Record);
5375 Invalid = true;
5376 }
5377
5378 void CheckType(const NamedDecl *D, TypeLoc TL, Sema::AbstractDiagSelID Sel);
5379 };
5380
5381 struct CheckAbstractUsage {
5382 AbstractUsageInfo &Info;
5383 const NamedDecl *Ctx;
5384
5385 CheckAbstractUsage(AbstractUsageInfo &Info, const NamedDecl *Ctx)
5386 : Info(Info), Ctx(Ctx) {}
5387
5388 void Visit(TypeLoc TL, Sema::AbstractDiagSelID Sel) {
5389 switch (TL.getTypeLocClass()) {
5390 #define ABSTRACT_TYPELOC(CLASS, PARENT)
5391 #define TYPELOC(CLASS, PARENT) \
5392 case TypeLoc::CLASS: Check(TL.castAs<CLASS##TypeLoc>(), Sel); break;
5393 #include "clang/AST/TypeLocNodes.def"
5394 }
5395 }
5396
5397 void Check(FunctionProtoTypeLoc TL, Sema::AbstractDiagSelID Sel) {
5398 Visit(TL.getReturnLoc(), Sema::AbstractReturnType);
5399 for (unsigned I = 0, E = TL.getNumParams(); I != E; ++I) {
5400 if (!TL.getParam(I))
5401 continue;
5402
5403 TypeSourceInfo *TSI = TL.getParam(I)->getTypeSourceInfo();
5404 if (TSI) Visit(TSI->getTypeLoc(), Sema::AbstractParamType);
5405 }
5406 }
5407
5408 void Check(ArrayTypeLoc TL, Sema::AbstractDiagSelID Sel) {
5409 Visit(TL.getElementLoc(), Sema::AbstractArrayType);
5410 }
5411
5412 void Check(TemplateSpecializationTypeLoc TL, Sema::AbstractDiagSelID Sel) {
5413 // Visit the type parameters from a permissive context.
5414 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) {
5415 TemplateArgumentLoc TAL = TL.getArgLoc(I);
5416 if (TAL.getArgument().getKind() == TemplateArgument::Type)
5417 if (TypeSourceInfo *TSI = TAL.getTypeSourceInfo())
5418 Visit(TSI->getTypeLoc(), Sema::AbstractNone);
5419 // TODO: other template argument types?
5420 }
5421 }
5422
5423 // Visit pointee types from a permissive context.
5424 #define CheckPolymorphic(Type) \
5425 void Check(Type TL, Sema::AbstractDiagSelID Sel) { \
5426 Visit(TL.getNextTypeLoc(), Sema::AbstractNone); \
5427 }
5428 CheckPolymorphic(PointerTypeLoc)
5429 CheckPolymorphic(ReferenceTypeLoc)
5430 CheckPolymorphic(MemberPointerTypeLoc)
5431 CheckPolymorphic(BlockPointerTypeLoc)
5432 CheckPolymorphic(AtomicTypeLoc)
5433
5434 /// Handle all the types we haven't given a more specific
5435 /// implementation for above.
5436 void Check(TypeLoc TL, Sema::AbstractDiagSelID Sel) {
5437 // Every other kind of type that we haven't called out already
5438 // that has an inner type is either (1) sugar or (2) contains that
5439 // inner type in some way as a subobject.
5440 if (TypeLoc Next = TL.getNextTypeLoc())
5441 return Visit(Next, Sel);
5442
5443 // If there's no inner type and we're in a permissive context,
5444 // don't diagnose.
5445 if (Sel == Sema::AbstractNone) return;
5446
5447 // Check whether the type matches the abstract type.
5448 QualType T = TL.getType();
5449 if (T->isArrayType()) {
5450 Sel = Sema::AbstractArrayType;
5451 T = Info.S.Context.getBaseElementType(T);
5452 }
5453 CanQualType CT = T->getCanonicalTypeUnqualified().getUnqualifiedType();
5454 if (CT != Info.AbstractType) return;
5455
5456 // It matched; do some magic.
5457 if (Sel == Sema::AbstractArrayType) {
5458 Info.S.Diag(Ctx->getLocation(), diag::err_array_of_abstract_type)
5459 << T << TL.getSourceRange();
5460 } else {
5461 Info.S.Diag(Ctx->getLocation(), diag::err_abstract_type_in_decl)
5462 << Sel << T << TL.getSourceRange();
5463 }
5464 Info.DiagnoseAbstractType();
5465 }
5466 };
5467
5468 void AbstractUsageInfo::CheckType(const NamedDecl *D, TypeLoc TL,
5469 Sema::AbstractDiagSelID Sel) {
5470 CheckAbstractUsage(*this, D).Visit(TL, Sel);
5471 }
5472
5473 }
5474
5475 /// Check for invalid uses of an abstract type in a method declaration.
5476 static void CheckAbstractClassUsage(AbstractUsageInfo &Info,
5477 CXXMethodDecl *MD) {
5478 // No need to do the check on definitions, which require that
5479 // the return/param types be complete.
5480 if (MD->doesThisDeclarationHaveABody())
5481 return;
5482
5483 // For safety's sake, just ignore it if we don't have type source
5484 // information. This should never happen for non-implicit methods,
5485 // but...
5486 if (TypeSourceInfo *TSI = MD->getTypeSourceInfo())
5487 Info.CheckType(MD, TSI->getTypeLoc(), Sema::AbstractNone);
5488 }
5489
5490 /// Check for invalid uses of an abstract type within a class definition.
5491 static void CheckAbstractClassUsage(AbstractUsageInfo &Info,
5492 CXXRecordDecl *RD) {
5493 for (auto *D : RD->decls()) {
5494 if (D->isImplicit()) continue;
5495
5496 // Methods and method templates.
5497 if (isa<CXXMethodDecl>(D)) {
5498 CheckAbstractClassUsage(Info, cast<CXXMethodDecl>(D));
5499 } else if (isa<FunctionTemplateDecl>(D)) {
5500 FunctionDecl *FD = cast<FunctionTemplateDecl>(D)->getTemplatedDecl();
5501 CheckAbstractClassUsage(Info, cast<CXXMethodDecl>(FD));
5502
5503 // Fields and static variables.
5504 } else if (isa<FieldDecl>(D)) {
5505 FieldDecl *FD = cast<FieldDecl>(D);
5506 if (TypeSourceInfo *TSI = FD->getTypeSourceInfo())
5507 Info.CheckType(FD, TSI->getTypeLoc(), Sema::AbstractFieldType);
5508 } else if (isa<VarDecl>(D)) {
5509 VarDecl *VD = cast<VarDecl>(D);
5510 if (TypeSourceInfo *TSI = VD->getTypeSourceInfo())
5511 Info.CheckType(VD, TSI->getTypeLoc(), Sema::AbstractVariableType);
5512
5513 // Nested classes and class templates.
5514 } else if (isa<CXXRecordDecl>(D)) {
5515 CheckAbstractClassUsage(Info, cast<CXXRecordDecl>(D));
5516 } else if (isa<ClassTemplateDecl>(D)) {
5517 CheckAbstractClassUsage(Info,
5518 cast<ClassTemplateDecl>(D)->getTemplatedDecl());
5519 }
5520 }
5521 }
5522
5523 static void ReferenceDllExportedMembers(Sema &S, CXXRecordDecl *Class) {
5524 Attr *ClassAttr = getDLLAttr(Class);
5525 if (!ClassAttr)
5526 return;
5527
5528 assert(ClassAttr->getKind() == attr::DLLExport);
5529
5530 TemplateSpecializationKind TSK = Class->getTemplateSpecializationKind();
5531
5532 if (TSK == TSK_ExplicitInstantiationDeclaration)
5533 // Don't go any further if this is just an explicit instantiation
5534 // declaration.
5535 return;
5536
5537 if (S.Context.getTargetInfo().getTriple().isWindowsGNUEnvironment())
5538 S.MarkVTableUsed(Class->getLocation(), Class, true);
5539
5540 for (Decl *Member : Class->decls()) {
5541 // Defined static variables that are members of an exported base
5542 // class must be marked export too.
5543 auto *VD = dyn_cast<VarDecl>(Member);
5544 if (VD && Member->getAttr<DLLExportAttr>() &&
5545 VD->getStorageClass() == SC_Static &&
5546 TSK == TSK_ImplicitInstantiation)
5547 S.MarkVariableReferenced(VD->getLocation(), VD);
5548
5549 auto *MD = dyn_cast<CXXMethodDecl>(Member);
5550 if (!MD)
5551 continue;
5552
5553 if (Member->getAttr<DLLExportAttr>()) {
5554 if (MD->isUserProvided()) {
5555 // Instantiate non-default class member functions ...
5556
5557 // .. except for certain kinds of template specializations.
5558 if (TSK == TSK_ImplicitInstantiation && !ClassAttr->isInherited())
5559 continue;
5560
5561 S.MarkFunctionReferenced(Class->getLocation(), MD);
5562
5563 // The function will be passed to the consumer when its definition is
5564 // encountered.
5565 } else if (!MD->isTrivial() || MD->isExplicitlyDefaulted() ||
5566 MD->isCopyAssignmentOperator() ||
5567 MD->isMoveAssignmentOperator()) {
5568 // Synthesize and instantiate non-trivial implicit methods, explicitly
5569 // defaulted methods, and the copy and move assignment operators. The
5570 // latter are exported even if they are trivial, because the address of
5571 // an operator can be taken and should compare equal across libraries.
5572 DiagnosticErrorTrap Trap(S.Diags);
5573 S.MarkFunctionReferenced(Class->getLocation(), MD);
5574 if (Trap.hasErrorOccurred()) {
5575 S.Diag(ClassAttr->getLocation(), diag::note_due_to_dllexported_class)
5576 << Class << !S.getLangOpts().CPlusPlus11;
5577 break;
5578 }
5579
5580 // There is no later point when we will see the definition of this
5581 // function, so pass it to the consumer now.
5582 S.Consumer.HandleTopLevelDecl(DeclGroupRef(MD));
5583 }
5584 }
5585 }
5586 }
5587
5588 static void checkForMultipleExportedDefaultConstructors(Sema &S,
5589 CXXRecordDecl *Class) {
5590 // Only the MS ABI has default constructor closures, so we don't need to do
5591 // this semantic checking anywhere else.
5592 if (!S.Context.getTargetInfo().getCXXABI().isMicrosoft())
5593 return;
5594
5595 CXXConstructorDecl *LastExportedDefaultCtor = nullptr;
5596 for (Decl *Member : Class->decls()) {
5597 // Look for exported default constructors.
5598 auto *CD = dyn_cast<CXXConstructorDecl>(Member);
5599 if (!CD || !CD->isDefaultConstructor())
5600 continue;
5601 auto *Attr = CD->getAttr<DLLExportAttr>();
5602 if (!Attr)
5603 continue;
5604
5605 // If the class is non-dependent, mark the default arguments as ODR-used so
5606 // that we can properly codegen the constructor closure.
5607 if (!Class->isDependentContext()) {
5608 for (ParmVarDecl *PD : CD->parameters()) {
5609 (void)S.CheckCXXDefaultArgExpr(Attr->getLocation(), CD, PD);
5610 S.DiscardCleanupsInEvaluationContext();
5611 }
5612 }
5613
5614 if (LastExportedDefaultCtor) {
5615 S.Diag(LastExportedDefaultCtor->getLocation(),
5616 diag::err_attribute_dll_ambiguous_default_ctor)
5617 << Class;
5618 S.Diag(CD->getLocation(), diag::note_entity_declared_at)
5619 << CD->getDeclName();
5620 return;
5621 }
5622 LastExportedDefaultCtor = CD;
5623 }
5624 }
5625
5626 void Sema::checkClassLevelCodeSegAttribute(CXXRecordDecl *Class) {
5627 // Mark any compiler-generated routines with the implicit code_seg attribute.
5628 for (auto *Method : Class->methods()) {
5629 if (Method->isUserProvided())
5630 continue;
5631 if (Attr *A = getImplicitCodeSegOrSectionAttrForFunction(Method, /*IsDefinition=*/true))
5632 Method->addAttr(A);
5633 }
5634 }
5635
5636 /// Check class-level dllimport/dllexport attribute.
5637 void Sema::checkClassLevelDLLAttribute(CXXRecordDecl *Class) {
5638 Attr *ClassAttr = getDLLAttr(Class);
5639
5640 // MSVC inherits DLL attributes to partial class template specializations.
5641 if (Context.getTargetInfo().getCXXABI().isMicrosoft() && !ClassAttr) {
5642 if (auto *Spec = dyn_cast<ClassTemplatePartialSpecializationDecl>(Class)) {
5643 if (Attr *TemplateAttr =
5644 getDLLAttr(Spec->getSpecializedTemplate()->getTemplatedDecl())) {
5645 auto *A = cast<InheritableAttr>(TemplateAttr->clone(getASTContext()));
5646 A->setInherited(true);
5647 ClassAttr = A;
5648 }
5649 }
5650 }
5651
5652 if (!ClassAttr)
5653 return;
5654
5655 if (!Class->isExternallyVisible()) {
5656 Diag(Class->getLocation(), diag::err_attribute_dll_not_extern)
5657 << Class << ClassAttr;
5658 return;
5659 }
5660
5661 if (Context.getTargetInfo().getCXXABI().isMicrosoft() &&
5662 !ClassAttr->isInherited()) {
5663 // Diagnose dll attributes on members of class with dll attribute.
5664 for (Decl *Member : Class->decls()) {
5665 if (!isa<VarDecl>(Member) && !isa<CXXMethodDecl>(Member))
5666 continue;
5667 InheritableAttr *MemberAttr = getDLLAttr(Member);
5668 if (!MemberAttr || MemberAttr->isInherited() || Member->isInvalidDecl())
5669 continue;
5670
5671 Diag(MemberAttr->getLocation(),
5672 diag::err_attribute_dll_member_of_dll_class)
5673 << MemberAttr << ClassAttr;
5674 Diag(ClassAttr->getLocation(), diag::note_previous_attribute);
5675 Member->setInvalidDecl();
5676 }
5677 }
5678
5679 if (Class->getDescribedClassTemplate())
5680 // Don't inherit dll attribute until the template is instantiated.
5681 return;
5682
5683 // The class is either imported or exported.
5684 const bool ClassExported = ClassAttr->getKind() == attr::DLLExport;
5685
5686 // Check if this was a dllimport attribute propagated from a derived class to
5687 // a base class template specialization. We don't apply these attributes to
5688 // static data members.
5689 const bool PropagatedImport =
5690 !ClassExported &&
5691 cast<DLLImportAttr>(ClassAttr)->wasPropagatedToBaseTemplate();
5692
5693 TemplateSpecializationKind TSK = Class->getTemplateSpecializationKind();
5694
5695 // Ignore explicit dllexport on explicit class template instantiation declarations.
5696 if (ClassExported && !ClassAttr->isInherited() &&
5697 TSK == TSK_ExplicitInstantiationDeclaration) {
5698 Class->dropAttr<DLLExportAttr>();
5699 return;
5700 }
5701
5702 // Force declaration of implicit members so they can inherit the attribute.
5703 ForceDeclarationOfImplicitMembers(Class);
5704
5705 // FIXME: MSVC's docs say all bases must be exportable, but this doesn't
5706 // seem to be true in practice?
5707
5708 for (Decl *Member : Class->decls()) {
5709 VarDecl *VD = dyn_cast<VarDecl>(Member);
5710 CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Member);
5711
5712 // Only methods and static fields inherit the attributes.
5713 if (!VD && !MD)
5714 continue;
5715
5716 if (MD) {
5717 // Don't process deleted methods.
5718 if (MD->isDeleted())
5719 continue;
5720
5721 if (MD->isInlined()) {
5722 // MinGW does not import or export inline methods.
5723 if (!Context.getTargetInfo().getCXXABI().isMicrosoft() &&
5724 !Context.getTargetInfo().getTriple().isWindowsItaniumEnvironment())
5725 continue;
5726
5727 // MSVC versions before 2015 don't export the move assignment operators
5728 // and move constructor, so don't attempt to import/export them if
5729 // we have a definition.
5730 auto *Ctor = dyn_cast<CXXConstructorDecl>(MD);
5731 if ((MD->isMoveAssignmentOperator() ||
5732 (Ctor && Ctor->isMoveConstructor())) &&
5733 !getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015))
5734 continue;
5735
5736 // MSVC2015 doesn't export trivial defaulted x-tor but copy assign
5737 // operator is exported anyway.
5738 if (getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015) &&
5739 (Ctor || isa<CXXDestructorDecl>(MD)) && MD->isTrivial())
5740 continue;
5741 }
5742 }
5743
5744 // Don't apply dllimport attributes to static data members of class template
5745 // instantiations when the attribute is propagated from a derived class.
5746 if (VD && PropagatedImport)
5747 continue;
5748
5749 if (!cast<NamedDecl>(Member)->isExternallyVisible())
5750 continue;
5751
5752 if (!getDLLAttr(Member)) {
5753 InheritableAttr *NewAttr = nullptr;
5754
5755 // Do not export/import inline function when -fno-dllexport-inlines is
5756 // passed. But add attribute for later local static var check.
5757 if (!getLangOpts().DllExportInlines && MD && MD->isInlined() &&
5758 TSK != TSK_ExplicitInstantiationDeclaration &&
5759 TSK != TSK_ExplicitInstantiationDefinition) {
5760 if (ClassExported) {
5761 NewAttr = ::new (getASTContext())
5762 DLLExportStaticLocalAttr(ClassAttr->getRange(),
5763 getASTContext(),
5764 ClassAttr->getSpellingListIndex());
5765 } else {
5766 NewAttr = ::new (getASTContext())
5767 DLLImportStaticLocalAttr(ClassAttr->getRange(),
5768 getASTContext(),
5769 ClassAttr->getSpellingListIndex());
5770 }
5771 } else {
5772 NewAttr = cast<InheritableAttr>(ClassAttr->clone(getASTContext()));
5773 }
5774
5775 NewAttr->setInherited(true);
5776 Member->addAttr(NewAttr);
5777
5778 if (MD) {
5779 // Propagate DLLAttr to friend re-declarations of MD that have already
5780 // been constructed.
5781 for (FunctionDecl *FD = MD->getMostRecentDecl(); FD;
5782 FD = FD->getPreviousDecl()) {
5783 if (FD->getFriendObjectKind() == Decl::FOK_None)
5784 continue;
5785 assert(!getDLLAttr(FD) &&
5786 "friend re-decl should not already have a DLLAttr");
5787 NewAttr = cast<InheritableAttr>(ClassAttr->clone(getASTContext()));
5788 NewAttr->setInherited(true);
5789 FD->addAttr(NewAttr);
5790 }
5791 }
5792 }
5793 }
5794
5795 if (ClassExported)
5796 DelayedDllExportClasses.push_back(Class);
5797 }
5798
5799 /// Perform propagation of DLL attributes from a derived class to a
5800 /// templated base class for MS compatibility.
5801 void Sema::propagateDLLAttrToBaseClassTemplate(
5802 CXXRecordDecl *Class, Attr *ClassAttr,
5803 ClassTemplateSpecializationDecl *BaseTemplateSpec, SourceLocation BaseLoc) {
5804 if (getDLLAttr(
5805 BaseTemplateSpec->getSpecializedTemplate()->getTemplatedDecl())) {
5806 // If the base class template has a DLL attribute, don't try to change it.
5807 return;
5808 }
5809
5810 auto TSK = BaseTemplateSpec->getSpecializationKind();
5811 if (!getDLLAttr(BaseTemplateSpec) &&
5812 (TSK == TSK_Undeclared || TSK == TSK_ExplicitInstantiationDeclaration ||
5813 TSK == TSK_ImplicitInstantiation)) {
5814 // The template hasn't been instantiated yet (or it has, but only as an
5815 // explicit instantiation declaration or implicit instantiation, which means
5816 // we haven't codegenned any members yet), so propagate the attribute.
5817 auto *NewAttr = cast<InheritableAttr>(ClassAttr->clone(getASTContext()));
5818 NewAttr->setInherited(true);
5819 BaseTemplateSpec->addAttr(NewAttr);
5820
5821 // If this was an import, mark that we propagated it from a derived class to
5822 // a base class template specialization.
5823 if (auto *ImportAttr = dyn_cast<DLLImportAttr>(NewAttr))
5824 ImportAttr->setPropagatedToBaseTemplate();
5825
5826 // If the template is already instantiated, checkDLLAttributeRedeclaration()
5827 // needs to be run again to work see the new attribute. Otherwise this will
5828 // get run whenever the template is instantiated.
5829 if (TSK != TSK_Undeclared)
5830 checkClassLevelDLLAttribute(BaseTemplateSpec);
5831
5832 return;
5833 }
5834
5835 if (getDLLAttr(BaseTemplateSpec)) {
5836 // The template has already been specialized or instantiated with an
5837 // attribute, explicitly or through propagation. We should not try to change
5838 // it.
5839 return;
5840 }
5841
5842 // The template was previously instantiated or explicitly specialized without
5843 // a dll attribute, It's too late for us to add an attribute, so warn that
5844 // this is unsupported.
5845 Diag(BaseLoc, diag::warn_attribute_dll_instantiated_base_class)
5846 << BaseTemplateSpec->isExplicitSpecialization();
5847 Diag(ClassAttr->getLocation(), diag::note_attribute);
5848 if (BaseTemplateSpec->isExplicitSpecialization()) {
5849 Diag(BaseTemplateSpec->getLocation(),
5850 diag::note_template_class_explicit_specialization_was_here)
5851 << BaseTemplateSpec;
5852 } else {
5853 Diag(BaseTemplateSpec->getPointOfInstantiation(),
5854 diag::note_template_class_instantiation_was_here)
5855 << BaseTemplateSpec;
5856 }
5857 }
5858
5859 static void DefineImplicitSpecialMember(Sema &S, CXXMethodDecl *MD,
5860 SourceLocation DefaultLoc) {
5861 switch (S.getSpecialMember(MD)) {
5862 case Sema::CXXDefaultConstructor:
5863 S.DefineImplicitDefaultConstructor(DefaultLoc,
5864 cast<CXXConstructorDecl>(MD));
5865 break;
5866 case Sema::CXXCopyConstructor:
5867 S.DefineImplicitCopyConstructor(DefaultLoc, cast<CXXConstructorDecl>(MD));
5868 break;
5869 case Sema::CXXCopyAssignment:
5870 S.DefineImplicitCopyAssignment(DefaultLoc, MD);
5871 break;
5872 case Sema::CXXDestructor:
5873 S.DefineImplicitDestructor(DefaultLoc, cast<CXXDestructorDecl>(MD));
5874 break;
5875 case Sema::CXXMoveConstructor:
5876 S.DefineImplicitMoveConstructor(DefaultLoc, cast<CXXConstructorDecl>(MD));
5877 break;
5878 case Sema::CXXMoveAssignment:
5879 S.DefineImplicitMoveAssignment(DefaultLoc, MD);
5880 break;
5881 case Sema::CXXInvalid:
5882 llvm_unreachable("Invalid special member.");
5883 }
5884 }
5885
5886 /// Determine whether a type is permitted to be passed or returned in
5887 /// registers, per C++ [class.temporary]p3.
5888 static bool canPassInRegisters(Sema &S, CXXRecordDecl *D,
5889 TargetInfo::CallingConvKind CCK) {
5890 if (D->isDependentType() || D->isInvalidDecl())
5891 return false;
5892
5893 // Clang <= 4 used the pre-C++11 rule, which ignores move operations.
5894 // The PS4 platform ABI follows the behavior of Clang 3.2.
5895 if (CCK == TargetInfo::CCK_ClangABI4OrPS4)
5896 return !D->hasNonTrivialDestructorForCall() &&
5897 !D->hasNonTrivialCopyConstructorForCall();
5898
5899 if (CCK == TargetInfo::CCK_MicrosoftWin64) {
5900 bool CopyCtorIsTrivial = false, CopyCtorIsTrivialForCall = false;
5901 bool DtorIsTrivialForCall = false;
5902
5903 // If a class has at least one non-deleted, trivial copy constructor, it
5904 // is passed according to the C ABI. Otherwise, it is passed indirectly.
5905 //
5906 // Note: This permits classes with non-trivial copy or move ctors to be
5907 // passed in registers, so long as they *also* have a trivial copy ctor,
5908 // which is non-conforming.
5909 if (D->needsImplicitCopyConstructor()) {
5910 if (!D->defaultedCopyConstructorIsDeleted()) {
5911 if (D->hasTrivialCopyConstructor())
5912 CopyCtorIsTrivial = true;
5913 if (D->hasTrivialCopyConstructorForCall())
5914 CopyCtorIsTrivialForCall = true;
5915 }
5916 } else {
5917 for (const CXXConstructorDecl *CD : D->ctors()) {
5918 if (CD->isCopyConstructor() && !CD->isDeleted()) {
5919 if (CD->isTrivial())
5920 CopyCtorIsTrivial = true;
5921 if (CD->isTrivialForCall())
5922 CopyCtorIsTrivialForCall = true;
5923 }
5924 }
5925 }
5926
5927 if (D->needsImplicitDestructor()) {
5928 if (!D->defaultedDestructorIsDeleted() &&
5929 D->hasTrivialDestructorForCall())
5930 DtorIsTrivialForCall = true;
5931 } else if (const auto *DD = D->getDestructor()) {
5932 if (!DD->isDeleted() && DD->isTrivialForCall())
5933 DtorIsTrivialForCall = true;
5934 }
5935
5936 // If the copy ctor and dtor are both trivial-for-calls, pass direct.
5937 if (CopyCtorIsTrivialForCall && DtorIsTrivialForCall)
5938 return true;
5939
5940 // If a class has a destructor, we'd really like to pass it indirectly
5941 // because it allows us to elide copies. Unfortunately, MSVC makes that
5942 // impossible for small types, which it will pass in a single register or
5943 // stack slot. Most objects with dtors are large-ish, so handle that early.
5944 // We can't call out all large objects as being indirect because there are
5945 // multiple x64 calling conventions and the C++ ABI code shouldn't dictate
5946 // how we pass large POD types.
5947
5948 // Note: This permits small classes with nontrivial destructors to be
5949 // passed in registers, which is non-conforming.
5950 if (CopyCtorIsTrivial &&
5951 S.getASTContext().getTypeSize(D->getTypeForDecl()) <= 64)
5952 return true;
5953 return false;
5954 }
5955
5956 // Per C++ [class.temporary]p3, the relevant condition is:
5957 // each copy constructor, move constructor, and destructor of X is
5958 // either trivial or deleted, and X has at least one non-deleted copy
5959 // or move constructor
5960 bool HasNonDeletedCopyOrMove = false;
5961
5962 if (D->needsImplicitCopyConstructor() &&
5963 !D->defaultedCopyConstructorIsDeleted()) {
5964 if (!D->hasTrivialCopyConstructorForCall())
5965 return false;
5966 HasNonDeletedCopyOrMove = true;
5967 }
5968
5969 if (S.getLangOpts().CPlusPlus11 && D->needsImplicitMoveConstructor() &&
5970 !D->defaultedMoveConstructorIsDeleted()) {
5971 if (!D->hasTrivialMoveConstructorForCall())
5972 return false;
5973 HasNonDeletedCopyOrMove = true;
5974 }
5975
5976 if (D->needsImplicitDestructor() && !D->defaultedDestructorIsDeleted() &&
5977 !D->hasTrivialDestructorForCall())
5978 return false;
5979
5980 for (const CXXMethodDecl *MD : D->methods()) {
5981 if (MD->isDeleted())
5982 continue;
5983
5984 auto *CD = dyn_cast<CXXConstructorDecl>(MD);
5985 if (CD && CD->isCopyOrMoveConstructor())
5986 HasNonDeletedCopyOrMove = true;
5987 else if (!isa<CXXDestructorDecl>(MD))
5988 continue;
5989
5990 if (!MD->isTrivialForCall())
5991 return false;
5992 }
5993
5994 return HasNonDeletedCopyOrMove;
5995 }
5996
5997 /// Perform semantic checks on a class definition that has been
5998 /// completing, introducing implicitly-declared members, checking for
5999 /// abstract types, etc.
6000 void Sema::CheckCompletedCXXClass(CXXRecordDecl *Record) {
6001 if (!Record)
6002 return;
6003
6004 if (Record->isAbstract() && !Record->isInvalidDecl()) {
6005 AbstractUsageInfo Info(*this, Record);
6006 CheckAbstractClassUsage(Info, Record);
6007 }
6008
6009 // If this is not an aggregate type and has no user-declared constructor,
6010 // complain about any non-static data members of reference or const scalar
6011 // type, since they will never get initializers.
6012 if (!Record->isInvalidDecl() && !Record->isDependentType() &&
6013 !Record->isAggregate() && !Record->hasUserDeclaredConstructor() &&
6014 !Record->isLambda()) {
6015 bool Complained = false;
6016 for (const auto *F : Record->fields()) {
6017 if (F->hasInClassInitializer() || F->isUnnamedBitfield())
6018 continue;
6019
6020 if (F->getType()->isReferenceType() ||
6021 (F->getType().isConstQualified() && F->getType()->isScalarType())) {
6022 if (!Complained) {
6023 Diag(Record->getLocation(), diag::warn_no_constructor_for_refconst)
6024 << Record->getTagKind() << Record;
6025 Complained = true;
6026 }
6027
6028 Diag(F->getLocation(), diag::note_refconst_member_not_initialized)
6029 << F->getType()->isReferenceType()
6030 << F->getDeclName();
6031 }
6032 }
6033 }
6034
6035 if (Record->getIdentifier()) {
6036 // C++ [class.mem]p13:
6037 // If T is the name of a class, then each of the following shall have a
6038 // name different from T:
6039 // - every member of every anonymous union that is a member of class T.
6040 //
6041 // C++ [class.mem]p14:
6042 // In addition, if class T has a user-declared constructor (12.1), every
6043 // non-static data member of class T shall have a name different from T.
6044 DeclContext::lookup_result R = Record->lookup(Record->getDeclName());
6045 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E;
6046 ++I) {
6047 NamedDecl *D = (*I)->getUnderlyingDecl();
6048 if (((isa<FieldDecl>(D) || isa<UnresolvedUsingValueDecl>(D)) &&
6049 Record->hasUserDeclaredConstructor()) ||
6050 isa<IndirectFieldDecl>(D)) {
6051 Diag((*I)->getLocation(), diag::err_member_name_of_class)
6052 << D->getDeclName();
6053 break;
6054 }
6055 }
6056 }
6057
6058 // Warn if the class has virtual methods but non-virtual public destructor.
6059 if (Record->isPolymorphic() && !Record->isDependentType()) {
6060 CXXDestructorDecl *dtor = Record->getDestructor();
6061 if ((!dtor || (!dtor->isVirtual() && dtor->getAccess() == AS_public)) &&
6062 !Record->hasAttr<FinalAttr>())
6063 Diag(dtor ? dtor->getLocation() : Record->getLocation(),
6064 diag::warn_non_virtual_dtor) << Context.getRecordType(Record);
6065 }
6066
6067 if (Record->isAbstract()) {
6068 if (FinalAttr *FA = Record->getAttr<FinalAttr>()) {
6069 Diag(Record->getLocation(), diag::warn_abstract_final_class)
6070 << FA->isSpelledAsSealed();
6071 DiagnoseAbstractType(Record);
6072 }
6073 }
6074
6075 // See if trivial_abi has to be dropped.
6076 if (Record->hasAttr<TrivialABIAttr>())
6077 checkIllFormedTrivialABIStruct(*Record);
6078
6079 // Set HasTrivialSpecialMemberForCall if the record has attribute
6080 // "trivial_abi".
6081 bool HasTrivialABI = Record->hasAttr<TrivialABIAttr>();
6082
6083 if (HasTrivialABI)
6084 Record->setHasTrivialSpecialMemberForCall();
6085
6086 bool HasMethodWithOverrideControl = false,
6087 HasOverridingMethodWithoutOverrideControl = false;
6088 if (!Record->isDependentType()) {
6089 for (auto *M : Record->methods()) {
6090 // See if a method overloads virtual methods in a base
6091 // class without overriding any.
6092 if (!M->isStatic())
6093 DiagnoseHiddenVirtualMethods(M);
6094 if (M->hasAttr<OverrideAttr>())
6095 HasMethodWithOverrideControl = true;
6096 else if (M->size_overridden_methods() > 0)
6097 HasOverridingMethodWithoutOverrideControl = true;
6098 // Check whether the explicitly-defaulted special members are valid.
6099 if (!M->isInvalidDecl() && M->isExplicitlyDefaulted())
6100 CheckExplicitlyDefaultedSpecialMember(M);
6101
6102 // For an explicitly defaulted or deleted special member, we defer
6103 // determining triviality until the class is complete. That time is now!
6104 CXXSpecialMember CSM = getSpecialMember(M);
6105 if (!M->isImplicit() && !M->isUserProvided()) {
6106 if (CSM != CXXInvalid) {
6107 M->setTrivial(SpecialMemberIsTrivial(M, CSM));
6108 // Inform the class that we've finished declaring this member.
6109 Record->finishedDefaultedOrDeletedMember(M);
6110 M->setTrivialForCall(
6111 HasTrivialABI ||
6112 SpecialMemberIsTrivial(M, CSM, TAH_ConsiderTrivialABI));
6113 Record->setTrivialForCallFlags(M);
6114 }
6115 }
6116
6117 // Set triviality for the purpose of calls if this is a user-provided
6118 // copy/move constructor or destructor.
6119 if ((CSM == CXXCopyConstructor || CSM == CXXMoveConstructor ||
6120 CSM == CXXDestructor) && M->isUserProvided()) {
6121 M->setTrivialForCall(HasTrivialABI);
6122 Record->setTrivialForCallFlags(M);
6123 }
6124
6125 if (!M->isInvalidDecl() && M->isExplicitlyDefaulted() &&
6126 M->hasAttr<DLLExportAttr>()) {
6127 if (getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015) &&
6128 M->isTrivial() &&
6129 (CSM == CXXDefaultConstructor || CSM == CXXCopyConstructor ||
6130 CSM == CXXDestructor))
6131 M->dropAttr<DLLExportAttr>();
6132
6133 if (M->hasAttr<DLLExportAttr>()) {
6134 DefineImplicitSpecialMember(*this, M, M->getLocation());
6135 ActOnFinishInlineFunctionDef(M);
6136 }
6137 }
6138 }
6139 }
6140
6141 if (HasMethodWithOverrideControl &&
6142 HasOverridingMethodWithoutOverrideControl) {
6143 // At least one method has the 'override' control declared.
6144 // Diagnose all other overridden methods which do not have 'override' specified on them.
6145 for (auto *M : Record->methods())
6146 DiagnoseAbsenceOfOverrideControl(M);
6147 }
6148
6149 // ms_struct is a request to use the same ABI rules as MSVC. Check
6150 // whether this class uses any C++ features that are implemented
6151 // completely differently in MSVC, and if so, emit a diagnostic.
6152 // That diagnostic defaults to an error, but we allow projects to
6153 // map it down to a warning (or ignore it). It's a fairly common
6154 // practice among users of the ms_struct pragma to mass-annotate
6155 // headers, sweeping up a bunch of types that the project doesn't
6156 // really rely on MSVC-compatible layout for. We must therefore
6157 // support "ms_struct except for C++ stuff" as a secondary ABI.
6158 if (Record->isMsStruct(Context) &&
6159 (Record->isPolymorphic() || Record->getNumBases())) {
6160 Diag(Record->getLocation(), diag::warn_cxx_ms_struct);
6161 }
6162
6163 checkClassLevelDLLAttribute(Record);
6164 checkClassLevelCodeSegAttribute(Record);
6165
6166 bool ClangABICompat4 =
6167 Context.getLangOpts().getClangABICompat() <= LangOptions::ClangABI::Ver4;
6168 TargetInfo::CallingConvKind CCK =
6169 Context.getTargetInfo().getCallingConvKind(ClangABICompat4);
6170 bool CanPass = canPassInRegisters(*this, Record, CCK);
6171
6172 // Do not change ArgPassingRestrictions if it has already been set to
6173 // APK_CanNeverPassInRegs.
6174 if (Record->getArgPassingRestrictions() != RecordDecl::APK_CanNeverPassInRegs)
6175 Record->setArgPassingRestrictions(CanPass
6176 ? RecordDecl::APK_CanPassInRegs
6177 : RecordDecl::APK_CannotPassInRegs);
6178
6179 // If canPassInRegisters returns true despite the record having a non-trivial
6180 // destructor, the record is destructed in the callee. This happens only when
6181 // the record or one of its subobjects has a field annotated with trivial_abi
6182 // or a field qualified with ObjC __strong/__weak.
6183 if (Context.getTargetInfo().getCXXABI().areArgsDestroyedLeftToRightInCallee())
6184 Record->setParamDestroyedInCallee(true);
6185 else if (Record->hasNonTrivialDestructor())
6186 Record->setParamDestroyedInCallee(CanPass);
6187
6188 if (getLangOpts().ForceEmitVTables) {
6189 // If we want to emit all the vtables, we need to mark it as used. This
6190 // is especially required for cases like vtable assumption loads.
6191 MarkVTableUsed(Record->getInnerLocStart(), Record);
6192 }
6193 }
6194
6195 /// Look up the special member function that would be called by a special
6196 /// member function for a subobject of class type.
6197 ///
6198 /// \param Class The class type of the subobject.
6199 /// \param CSM The kind of special member function.
6200 /// \param FieldQuals If the subobject is a field, its cv-qualifiers.
6201 /// \param ConstRHS True if this is a copy operation with a const object
6202 /// on its RHS, that is, if the argument to the outer special member
6203 /// function is 'const' and this is not a field marked 'mutable'.
6204 static Sema::SpecialMemberOverloadResult lookupCallFromSpecialMember(
6205 Sema &S, CXXRecordDecl *Class, Sema::CXXSpecialMember CSM,
6206 unsigned FieldQuals, bool ConstRHS) {
6207 unsigned LHSQuals = 0;
6208 if (CSM == Sema::CXXCopyAssignment || CSM == Sema::CXXMoveAssignment)
6209 LHSQuals = FieldQuals;
6210
6211 unsigned RHSQuals = FieldQuals;
6212 if (CSM == Sema::CXXDefaultConstructor || CSM == Sema::CXXDestructor)
6213 RHSQuals = 0;
6214 else if (ConstRHS)
6215 RHSQuals |= Qualifiers::Const;
6216
6217 return S.LookupSpecialMember(Class, CSM,
6218 RHSQuals & Qualifiers::Const,
6219 RHSQuals & Qualifiers::Volatile,
6220 false,
6221 LHSQuals & Qualifiers::Const,
6222 LHSQuals & Qualifiers::Volatile);
6223 }
6224
6225 class Sema::InheritedConstructorInfo {
6226 Sema &S;
6227 SourceLocation UseLoc;
6228
6229 /// A mapping from the base classes through which the constructor was
6230 /// inherited to the using shadow declaration in that base class (or a null
6231 /// pointer if the constructor was declared in that base class).
6232 llvm::DenseMap<CXXRecordDecl *, ConstructorUsingShadowDecl *>
6233 InheritedFromBases;
6234
6235 public:
6236 InheritedConstructorInfo(Sema &S, SourceLocation UseLoc,
6237 ConstructorUsingShadowDecl *Shadow)
6238 : S(S), UseLoc(UseLoc) {
6239 bool DiagnosedMultipleConstructedBases = false;
6240 CXXRecordDecl *ConstructedBase = nullptr;
6241 UsingDecl *ConstructedBaseUsing = nullptr;
6242
6243 // Find the set of such base class subobjects and check that there's a
6244 // unique constructed subobject.
6245 for (auto *D : Shadow->redecls()) {
6246 auto *DShadow = cast<ConstructorUsingShadowDecl>(D);
6247 auto *DNominatedBase = DShadow->getNominatedBaseClass();
6248 auto *DConstructedBase = DShadow->getConstructedBaseClass();
6249
6250 InheritedFromBases.insert(
6251 std::make_pair(DNominatedBase->getCanonicalDecl(),
6252 DShadow->getNominatedBaseClassShadowDecl()));
6253 if (DShadow->constructsVirtualBase())
6254 InheritedFromBases.insert(
6255 std::make_pair(DConstructedBase->getCanonicalDecl(),
6256 DShadow->getConstructedBaseClassShadowDecl()));
6257 else
6258 assert(DNominatedBase == DConstructedBase);
6259
6260 // [class.inhctor.init]p2:
6261 // If the constructor was inherited from multiple base class subobjects
6262 // of type B, the program is ill-formed.
6263 if (!ConstructedBase) {
6264 ConstructedBase = DConstructedBase;
6265 ConstructedBaseUsing = D->getUsingDecl();
6266 } else if (ConstructedBase != DConstructedBase &&
6267 !Shadow->isInvalidDecl()) {
6268 if (!DiagnosedMultipleConstructedBases) {
6269 S.Diag(UseLoc, diag::err_ambiguous_inherited_constructor)
6270 << Shadow->getTargetDecl();
6271 S.Diag(ConstructedBaseUsing->getLocation(),
6272 diag::note_ambiguous_inherited_constructor_using)
6273 << ConstructedBase;
6274 DiagnosedMultipleConstructedBases = true;
6275 }
6276 S.Diag(D->getUsingDecl()->getLocation(),
6277 diag::note_ambiguous_inherited_constructor_using)
6278 << DConstructedBase;
6279 }
6280 }
6281
6282 if (DiagnosedMultipleConstructedBases)
6283 Shadow->setInvalidDecl();
6284 }
6285
6286 /// Find the constructor to use for inherited construction of a base class,
6287 /// and whether that base class constructor inherits the constructor from a
6288 /// virtual base class (in which case it won't actually invoke it).
6289 std::pair<CXXConstructorDecl *, bool>
6290 findConstructorForBase(CXXRecordDecl *Base, CXXConstructorDecl *Ctor) const {
6291 auto It = InheritedFromBases.find(Base->getCanonicalDecl());
6292 if (It == InheritedFromBases.end())
6293 return std::make_pair(nullptr, false);
6294
6295 // This is an intermediary class.
6296 if (It->second)
6297 return std::make_pair(
6298 S.findInheritingConstructor(UseLoc, Ctor, It->second),
6299 It->second->constructsVirtualBase());
6300
6301 // This is the base class from which the constructor was inherited.
6302 return std::make_pair(Ctor, false);
6303 }
6304 };
6305
6306 /// Is the special member function which would be selected to perform the
6307 /// specified operation on the specified class type a constexpr constructor?
6308 static bool
6309 specialMemberIsConstexpr(Sema &S, CXXRecordDecl *ClassDecl,
6310 Sema::CXXSpecialMember CSM, unsigned Quals,
6311 bool ConstRHS,
6312 CXXConstructorDecl *InheritedCtor = nullptr,
6313 Sema::InheritedConstructorInfo *Inherited = nullptr) {
6314 // If we're inheriting a constructor, see if we need to call it for this base
6315 // class.
6316 if (InheritedCtor) {
6317 assert(CSM == Sema::CXXDefaultConstructor);
6318 auto BaseCtor =
6319 Inherited->findConstructorForBase(ClassDecl, InheritedCtor).first;
6320 if (BaseCtor)
6321 return BaseCtor->isConstexpr();
6322 }
6323
6324 if (CSM == Sema::CXXDefaultConstructor)
6325 return ClassDecl->hasConstexprDefaultConstructor();
6326
6327 Sema::SpecialMemberOverloadResult SMOR =
6328 lookupCallFromSpecialMember(S, ClassDecl, CSM, Quals, ConstRHS);
6329 if (!SMOR.getMethod())
6330 // A constructor we wouldn't select can't be "involved in initializing"
6331 // anything.
6332 return true;
6333 return SMOR.getMethod()->isConstexpr();
6334 }
6335
6336 /// Determine whether the specified special member function would be constexpr
6337 /// if it were implicitly defined.
6338 static bool defaultedSpecialMemberIsConstexpr(
6339 Sema &S, CXXRecordDecl *ClassDecl, Sema::CXXSpecialMember CSM,
6340 bool ConstArg, CXXConstructorDecl *InheritedCtor = nullptr,
6341 Sema::InheritedConstructorInfo *Inherited = nullptr) {
6342 if (!S.getLangOpts().CPlusPlus11)
6343 return false;
6344
6345 // C++11 [dcl.constexpr]p4:
6346 // In the definition of a constexpr constructor [...]
6347 bool Ctor = true;
6348 switch (CSM) {
6349 case Sema::CXXDefaultConstructor:
6350 if (Inherited)
6351 break;
6352 // Since default constructor lookup is essentially trivial (and cannot
6353 // involve, for instance, template instantiation), we compute whether a
6354 // defaulted default constructor is constexpr directly within CXXRecordDecl.
6355 //
6356 // This is important for performance; we need to know whether the default
6357 // constructor is constexpr to determine whether the type is a literal type.
6358 return ClassDecl->defaultedDefaultConstructorIsConstexpr();
6359
6360 case Sema::CXXCopyConstructor:
6361 case Sema::CXXMoveConstructor:
6362 // For copy or move constructors, we need to perform overload resolution.
6363 break;
6364
6365 case Sema::CXXCopyAssignment:
6366 case Sema::CXXMoveAssignment:
6367 if (!S.getLangOpts().CPlusPlus14)
6368 return false;
6369 // In C++1y, we need to perform overload resolution.
6370 Ctor = false;
6371 break;
6372
6373 case Sema::CXXDestructor:
6374 case Sema::CXXInvalid:
6375 return false;
6376 }
6377
6378 // -- if the class is a non-empty union, or for each non-empty anonymous
6379 // union member of a non-union class, exactly one non-static data member
6380 // shall be initialized; [DR1359]
6381 //
6382 // If we squint, this is guaranteed, since exactly one non-static data member
6383 // will be initialized (if the constructor isn't deleted), we just don't know
6384 // which one.
6385 if (Ctor && ClassDecl->isUnion())
6386 return CSM == Sema::CXXDefaultConstructor
6387 ? ClassDecl->hasInClassInitializer() ||
6388 !ClassDecl->hasVariantMembers()
6389 : true;
6390
6391 // -- the class shall not have any virtual base classes;
6392 if (Ctor && ClassDecl->getNumVBases())
6393 return false;
6394
6395 // C++1y [class.copy]p26:
6396 // -- [the class] is a literal type, and
6397 if (!Ctor && !ClassDecl->isLiteral())
6398 return false;
6399
6400 // -- every constructor involved in initializing [...] base class
6401 // sub-objects shall be a constexpr constructor;
6402 // -- the assignment operator selected to copy/move each direct base
6403 // class is a constexpr function, and
6404 for (const auto &B : ClassDecl->bases()) {
6405 const RecordType *BaseType = B.getType()->getAs<RecordType>();
6406 if (!BaseType) continue;
6407
6408 CXXRecordDecl *BaseClassDecl = cast<CXXRecordDecl>(BaseType->getDecl());
6409 if (!specialMemberIsConstexpr(S, BaseClassDecl, CSM, 0, ConstArg,
6410 InheritedCtor, Inherited))
6411 return false;
6412 }
6413
6414 // -- every constructor involved in initializing non-static data members
6415 // [...] shall be a constexpr constructor;
6416 // -- every non-static data member and base class sub-object shall be
6417 // initialized
6418 // -- for each non-static data member of X that is of class type (or array
6419 // thereof), the assignment operator selected to copy/move that member is
6420 // a constexpr function
6421 for (const auto *F : ClassDecl->fields()) {
6422 if (F->isInvalidDecl())
6423 continue;
6424 if (CSM == Sema::CXXDefaultConstructor && F->hasInClassInitializer())
6425 continue;
6426 QualType BaseType = S.Context.getBaseElementType(F->getType());
6427 if (const RecordType *RecordTy = BaseType->getAs<RecordType>()) {
6428 CXXRecordDecl *FieldRecDecl = cast<CXXRecordDecl>(RecordTy->getDecl());
6429 if (!specialMemberIsConstexpr(S, FieldRecDecl, CSM,
6430 BaseType.getCVRQualifiers(),
6431 ConstArg && !F->isMutable()))
6432 return false;
6433 } else if (CSM == Sema::CXXDefaultConstructor) {
6434 return false;
6435 }
6436 }
6437
6438 // All OK, it's constexpr!
6439 return true;
6440 }
6441
6442 static Sema::ImplicitExceptionSpecification
6443 ComputeDefaultedSpecialMemberExceptionSpec(
6444 Sema &S, SourceLocation Loc, CXXMethodDecl *MD, Sema::CXXSpecialMember CSM,
6445 Sema::InheritedConstructorInfo *ICI);
6446
6447 static Sema::ImplicitExceptionSpecification
6448 computeImplicitExceptionSpec(Sema &S, SourceLocation Loc, CXXMethodDecl *MD) {
6449 auto CSM = S.getSpecialMember(MD);
6450 if (CSM != Sema::CXXInvalid)
6451 return ComputeDefaultedSpecialMemberExceptionSpec(S, Loc, MD, CSM, nullptr);
6452
6453 auto *CD = cast<CXXConstructorDecl>(MD);
6454 assert(CD->getInheritedConstructor() &&
6455 "only special members have implicit exception specs");
6456 Sema::InheritedConstructorInfo ICI(
6457 S, Loc, CD->getInheritedConstructor().getShadowDecl());
6458 return ComputeDefaultedSpecialMemberExceptionSpec(
6459 S, Loc, CD, Sema::CXXDefaultConstructor, &ICI);
6460 }
6461
6462 static FunctionProtoType::ExtProtoInfo getImplicitMethodEPI(Sema &S,
6463 CXXMethodDecl *MD) {
6464 FunctionProtoType::ExtProtoInfo EPI;
6465
6466 // Build an exception specification pointing back at this member.
6467 EPI.ExceptionSpec.Type = EST_Unevaluated;
6468 EPI.ExceptionSpec.SourceDecl = MD;
6469
6470 // Set the calling convention to the default for C++ instance methods.
6471 EPI.ExtInfo = EPI.ExtInfo.withCallingConv(
6472 S.Context.getDefaultCallingConvention(/*IsVariadic=*/false,
6473 /*IsCXXMethod=*/true));
6474 return EPI;
6475 }
6476
6477 void Sema::EvaluateImplicitExceptionSpec(SourceLocation Loc, CXXMethodDecl *MD) {
6478 const FunctionProtoType *FPT = MD->getType()->castAs<FunctionProtoType>();
6479 if (FPT->getExceptionSpecType() != EST_Unevaluated)
6480 return;
6481
6482 // Evaluate the exception specification.
6483 auto IES = computeImplicitExceptionSpec(*this, Loc, MD);
6484 auto ESI = IES.getExceptionSpec();
6485
6486 // Update the type of the special member to use it.
6487 UpdateExceptionSpec(MD, ESI);
6488
6489 // A user-provided destructor can be defined outside the class. When that
6490 // happens, be sure to update the exception specification on both
6491 // declarations.
6492 const FunctionProtoType *CanonicalFPT =
6493 MD->getCanonicalDecl()->getType()->castAs<FunctionProtoType>();
6494 if (CanonicalFPT->getExceptionSpecType() == EST_Unevaluated)
6495 UpdateExceptionSpec(MD->getCanonicalDecl(), ESI);
6496 }
6497
6498 void Sema::CheckExplicitlyDefaultedSpecialMember(CXXMethodDecl *MD) {
6499 CXXRecordDecl *RD = MD->getParent();
6500 CXXSpecialMember CSM = getSpecialMember(MD);
6501
6502 assert(MD->isExplicitlyDefaulted() && CSM != CXXInvalid &&
6503 "not an explicitly-defaulted special member");
6504
6505 // Whether this was the first-declared instance of the constructor.
6506 // This affects whether we implicitly add an exception spec and constexpr.
6507 bool First = MD == MD->getCanonicalDecl();
6508
6509 bool HadError = false;
6510
6511 // C++11 [dcl.fct.def.default]p1:
6512 // A function that is explicitly defaulted shall
6513 // -- be a special member function (checked elsewhere),
6514 // -- have the same type (except for ref-qualifiers, and except that a
6515 // copy operation can take a non-const reference) as an implicit
6516 // declaration, and
6517 // -- not have default arguments.
6518 // C++2a changes the second bullet to instead delete the function if it's
6519 // defaulted on its first declaration, unless it's "an assignment operator,
6520 // and its return type differs or its parameter type is not a reference".
6521 bool DeleteOnTypeMismatch = getLangOpts().CPlusPlus2a && First;
6522 bool ShouldDeleteForTypeMismatch = false;
6523 unsigned ExpectedParams = 1;
6524 if (CSM == CXXDefaultConstructor || CSM == CXXDestructor)
6525 ExpectedParams = 0;
6526 if (MD->getNumParams() != ExpectedParams) {
6527 // This checks for default arguments: a copy or move constructor with a
6528 // default argument is classified as a default constructor, and assignment
6529 // operations and destructors can't have default arguments.
6530 Diag(MD->getLocation(), diag::err_defaulted_special_member_params)
6531 << CSM << MD->getSourceRange();
6532 HadError = true;
6533 } else if (MD->isVariadic()) {
6534 if (DeleteOnTypeMismatch)
6535 ShouldDeleteForTypeMismatch = true;
6536 else {
6537 Diag(MD->getLocation(), diag::err_defaulted_special_member_variadic)
6538 << CSM << MD->getSourceRange();
6539 HadError = true;
6540 }
6541 }
6542
6543 const FunctionProtoType *Type = MD->getType()->getAs<FunctionProtoType>();
6544
6545 bool CanHaveConstParam = false;
6546 if (CSM == CXXCopyConstructor)
6547 CanHaveConstParam = RD->implicitCopyConstructorHasConstParam();
6548 else if (CSM == CXXCopyAssignment)
6549 CanHaveConstParam = RD->implicitCopyAssignmentHasConstParam();
6550
6551 QualType ReturnType = Context.VoidTy;
6552 if (CSM == CXXCopyAssignment || CSM == CXXMoveAssignment) {
6553 // Check for return type matching.
6554 ReturnType = Type->getReturnType();
6555
6556 QualType DeclType = Context.getTypeDeclType(RD);
6557 DeclType = Context.getAddrSpaceQualType(DeclType, MD->getTypeQualifiers().getAddressSpace());
6558 QualType ExpectedReturnType = Context.getLValueReferenceType(DeclType);
6559
6560 if (!Context.hasSameType(ReturnType, ExpectedReturnType)) {
6561 Diag(MD->getLocation(), diag::err_defaulted_special_member_return_type)
6562 << (CSM == CXXMoveAssignment) << ExpectedReturnType;
6563 HadError = true;
6564 }
6565
6566 // A defaulted special member cannot have cv-qualifiers.
6567 if (Type->getTypeQuals().hasConst() || Type->getTypeQuals().hasVolatile()) {
6568 if (DeleteOnTypeMismatch)
6569 ShouldDeleteForTypeMismatch = true;
6570 else {
6571 Diag(MD->getLocation(), diag::err_defaulted_special_member_quals)
6572 << (CSM == CXXMoveAssignment) << getLangOpts().CPlusPlus14;
6573 HadError = true;
6574 }
6575 }
6576 }
6577
6578 // Check for parameter type matching.
6579 QualType ArgType = ExpectedParams ? Type->getParamType(0) : QualType();
6580 bool HasConstParam = false;
6581 if (ExpectedParams && ArgType->isReferenceType()) {
6582 // Argument must be reference to possibly-const T.
6583 QualType ReferentType = ArgType->getPointeeType();
6584 HasConstParam = ReferentType.isConstQualified();
6585
6586 if (ReferentType.isVolatileQualified()) {
6587 if (DeleteOnTypeMismatch)
6588 ShouldDeleteForTypeMismatch = true;
6589 else {
6590 Diag(MD->getLocation(),
6591 diag::err_defaulted_special_member_volatile_param) << CSM;
6592 HadError = true;
6593 }
6594 }
6595
6596 if (HasConstParam && !CanHaveConstParam) {
6597 if (DeleteOnTypeMismatch)
6598 ShouldDeleteForTypeMismatch = true;
6599 else if (CSM == CXXCopyConstructor || CSM == CXXCopyAssignment) {
6600 Diag(MD->getLocation(),
6601 diag::err_defaulted_special_member_copy_const_param)
6602 << (CSM == CXXCopyAssignment);
6603 // FIXME: Explain why this special member can't be const.
6604 HadError = true;
6605 } else {
6606 Diag(MD->getLocation(),
6607 diag::err_defaulted_special_member_move_const_param)
6608 << (CSM == CXXMoveAssignment);
6609 HadError = true;
6610 }
6611 }
6612 } else if (ExpectedParams) {
6613 // A copy assignment operator can take its argument by value, but a
6614 // defaulted one cannot.
6615 assert(CSM == CXXCopyAssignment && "unexpected non-ref argument");
6616 Diag(MD->getLocation(), diag::err_defaulted_copy_assign_not_ref);
6617 HadError = true;
6618 }
6619
6620 // C++11 [dcl.fct.def.default]p2:
6621 // An explicitly-defaulted function may be declared constexpr only if it
6622 // would have been implicitly declared as constexpr,
6623 // Do not apply this rule to members of class templates, since core issue 1358
6624 // makes such functions always instantiate to constexpr functions. For
6625 // functions which cannot be constexpr (for non-constructors in C++11 and for
6626 // destructors in C++1y), this is checked elsewhere.
6627 bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, RD, CSM,
6628 HasConstParam);
6629 if ((getLangOpts().CPlusPlus14 ? !isa<CXXDestructorDecl>(MD)
6630 : isa<CXXConstructorDecl>(MD)) &&
6631 MD->isConstexpr() && !Constexpr &&
6632 MD->getTemplatedKind() == FunctionDecl::TK_NonTemplate) {
6633 Diag(MD->getBeginLoc(), diag::err_incorrect_defaulted_constexpr) << CSM;
6634 // FIXME: Explain why the special member can't be constexpr.
6635 HadError = true;
6636 }
6637
6638 // and may have an explicit exception-specification only if it is compatible
6639 // with the exception-specification on the implicit declaration.
6640 if (Type->hasExceptionSpec()) {
6641 // Delay the check if this is the first declaration of the special member,
6642 // since we may not have parsed some necessary in-class initializers yet.
6643 if (First) {
6644 // If the exception specification needs to be instantiated, do so now,
6645 // before we clobber it with an EST_Unevaluated specification below.
6646 if (Type->getExceptionSpecType() == EST_Uninstantiated) {
6647 InstantiateExceptionSpec(MD->getBeginLoc(), MD);
6648 Type = MD->getType()->getAs<FunctionProtoType>();
6649 }
6650 DelayedDefaultedMemberExceptionSpecs.push_back(std::make_pair(MD, Type));
6651 } else
6652 CheckExplicitlyDefaultedMemberExceptionSpec(MD, Type);
6653 }
6654
6655 // If a function is explicitly defaulted on its first declaration,
6656 if (First) {
6657 // -- it is implicitly considered to be constexpr if the implicit
6658 // definition would be,
6659 MD->setConstexpr(Constexpr);
6660
6661 // -- it is implicitly considered to have the same exception-specification
6662 // as if it had been implicitly declared,
6663 FunctionProtoType::ExtProtoInfo EPI = Type->getExtProtoInfo();
6664 EPI.ExceptionSpec.Type = EST_Unevaluated;
6665 EPI.ExceptionSpec.SourceDecl = MD;
6666 MD->setType(Context.getFunctionType(ReturnType,
6667 llvm::makeArrayRef(&ArgType,
6668 ExpectedParams),
6669 EPI));
6670 }
6671
6672 if (ShouldDeleteForTypeMismatch || ShouldDeleteSpecialMember(MD, CSM)) {
6673 if (First) {
6674 SetDeclDeleted(MD, MD->getLocation());
6675 if (!inTemplateInstantiation() && !HadError) {
6676 Diag(MD->getLocation(), diag::warn_defaulted_method_deleted) << CSM;
6677 if (ShouldDeleteForTypeMismatch) {
6678 Diag(MD->getLocation(), diag::note_deleted_type_mismatch) << CSM;
6679 } else {
6680 ShouldDeleteSpecialMember(MD, CSM, nullptr, /*Diagnose*/true);
6681 }
6682 }
6683 if (ShouldDeleteForTypeMismatch && !HadError) {
6684 Diag(MD->getLocation(),
6685 diag::warn_cxx17_compat_defaulted_method_type_mismatch) << CSM;
6686 }
6687 } else {
6688 // C++11 [dcl.fct.def.default]p4:
6689 // [For a] user-provided explicitly-defaulted function [...] if such a
6690 // function is implicitly defined as deleted, the program is ill-formed.
6691 Diag(MD->getLocation(), diag::err_out_of_line_default_deletes) << CSM;
6692 assert(!ShouldDeleteForTypeMismatch && "deleted non-first decl");
6693 ShouldDeleteSpecialMember(MD, CSM, nullptr, /*Diagnose*/true);
6694 HadError = true;
6695 }
6696 }
6697
6698 if (HadError)
6699 MD->setInvalidDecl();
6700 }
6701
6702 /// Check whether the exception specification provided for an
6703 /// explicitly-defaulted special member matches the exception specification
6704 /// that would have been generated for an implicit special member, per
6705 /// C++11 [dcl.fct.def.default]p2.
6706 void Sema::CheckExplicitlyDefaultedMemberExceptionSpec(
6707 CXXMethodDecl *MD, const FunctionProtoType *SpecifiedType) {
6708 // If the exception specification was explicitly specified but hadn't been
6709 // parsed when the method was defaulted, grab it now.
6710 if (SpecifiedType->getExceptionSpecType() == EST_Unparsed)
6711 SpecifiedType =
6712 MD->getTypeSourceInfo()->getType()->castAs<FunctionProtoType>();
6713
6714 // Compute the implicit exception specification.
6715 CallingConv CC = Context.getDefaultCallingConvention(/*IsVariadic=*/false,
6716 /*IsCXXMethod=*/true);
6717 FunctionProtoType::ExtProtoInfo EPI(CC);
6718 auto IES = computeImplicitExceptionSpec(*this, MD->getLocation(), MD);
6719 EPI.ExceptionSpec = IES.getExceptionSpec();
6720 const FunctionProtoType *ImplicitType = cast<FunctionProtoType>(
6721 Context.getFunctionType(Context.VoidTy, None, EPI));
6722
6723 // Ensure that it matches.
6724 CheckEquivalentExceptionSpec(
6725 PDiag(diag::err_incorrect_defaulted_exception_spec)
6726 << getSpecialMember(MD), PDiag(),
6727 ImplicitType, SourceLocation(),
6728 SpecifiedType, MD->getLocation());
6729 }
6730
6731 void Sema::CheckDelayedMemberExceptionSpecs() {
6732 decltype(DelayedOverridingExceptionSpecChecks) Overriding;
6733 decltype(DelayedEquivalentExceptionSpecChecks) Equivalent;
6734 decltype(DelayedDefaultedMemberExceptionSpecs) Defaulted;
6735
6736 std::swap(Overriding, DelayedOverridingExceptionSpecChecks);
6737 std::swap(Equivalent, DelayedEquivalentExceptionSpecChecks);
6738 std::swap(Defaulted, DelayedDefaultedMemberExceptionSpecs);
6739
6740 // Perform any deferred checking of exception specifications for virtual
6741 // destructors.
6742 for (auto &Check : Overriding)
6743 CheckOverridingFunctionExceptionSpec(Check.first, Check.second);
6744
6745 // Perform any deferred checking of exception specifications for befriended
6746 // special members.
6747 for (auto &Check : Equivalent)
6748 CheckEquivalentExceptionSpec(Check.second, Check.first);
6749
6750 // Check that any explicitly-defaulted methods have exception specifications
6751 // compatible with their implicit exception specifications.
6752 for (auto &Spec : Defaulted)
6753 CheckExplicitlyDefaultedMemberExceptionSpec(Spec.first, Spec.second);
6754 }
6755
6756 namespace {
6757 /// CRTP base class for visiting operations performed by a special member
6758 /// function (or inherited constructor).
6759 template<typename Derived>
6760 struct SpecialMemberVisitor {
6761 Sema &S;
6762 CXXMethodDecl *MD;
6763 Sema::CXXSpecialMember CSM;
6764 Sema::InheritedConstructorInfo *ICI;
6765
6766 // Properties of the special member, computed for convenience.
6767 bool IsConstructor = false, IsAssignment = false, ConstArg = false;
6768
6769 SpecialMemberVisitor(Sema &S, CXXMethodDecl *MD, Sema::CXXSpecialMember CSM,
6770 Sema::InheritedConstructorInfo *ICI)
6771 : S(S), MD(MD), CSM(CSM), ICI(ICI) {
6772 switch (CSM) {
6773 case Sema::CXXDefaultConstructor:
6774 case Sema::CXXCopyConstructor:
6775 case Sema::CXXMoveConstructor:
6776 IsConstructor = true;
6777 break;
6778 case Sema::CXXCopyAssignment:
6779 case Sema::CXXMoveAssignment:
6780 IsAssignment = true;
6781 break;
6782 case Sema::CXXDestructor:
6783 break;
6784 case Sema::CXXInvalid:
6785 llvm_unreachable("invalid special member kind");
6786 }
6787
6788 if (MD->getNumParams()) {
6789 if (const ReferenceType *RT =
6790 MD->getParamDecl(0)->getType()->getAs<ReferenceType>())
6791 ConstArg = RT->getPointeeType().isConstQualified();
6792 }
6793 }
6794
6795 Derived &getDerived() { return static_cast<Derived&>(*this); }
6796
6797 /// Is this a "move" special member?
6798 bool isMove() const {
6799 return CSM == Sema::CXXMoveConstructor || CSM == Sema::CXXMoveAssignment;
6800 }
6801
6802 /// Look up the corresponding special member in the given class.
6803 Sema::SpecialMemberOverloadResult lookupIn(CXXRecordDecl *Class,
6804 unsigned Quals, bool IsMutable) {
6805 return lookupCallFromSpecialMember(S, Class, CSM, Quals,
6806 ConstArg && !IsMutable);
6807 }
6808
6809 /// Look up the constructor for the specified base class to see if it's
6810 /// overridden due to this being an inherited constructor.
6811 Sema::SpecialMemberOverloadResult lookupInheritedCtor(CXXRecordDecl *Class) {
6812 if (!ICI)
6813 return {};
6814 assert(CSM == Sema::CXXDefaultConstructor);
6815 auto *BaseCtor =
6816 cast<CXXConstructorDecl>(MD)->getInheritedConstructor().getConstructor();
6817 if (auto *MD = ICI->findConstructorForBase(Class, BaseCtor).first)
6818 return MD;
6819 return {};
6820 }
6821
6822 /// A base or member subobject.
6823 typedef llvm::PointerUnion<CXXBaseSpecifier*, FieldDecl*> Subobject;
6824
6825 /// Get the location to use for a subobject in diagnostics.
6826 static SourceLocation getSubobjectLoc(Subobject Subobj) {
6827 // FIXME: For an indirect virtual base, the direct base leading to
6828 // the indirect virtual base would be a more useful choice.
6829 if (auto *B = Subobj.dyn_cast<CXXBaseSpecifier*>())
6830 return B->getBaseTypeLoc();
6831 else
6832 return Subobj.get<FieldDecl*>()->getLocation();
6833 }
6834
6835 enum BasesToVisit {
6836 /// Visit all non-virtual (direct) bases.
6837 VisitNonVirtualBases,
6838 /// Visit all direct bases, virtual or not.
6839 VisitDirectBases,
6840 /// Visit all non-virtual bases, and all virtual bases if the class
6841 /// is not abstract.
6842 VisitPotentiallyConstructedBases,
6843 /// Visit all direct or virtual bases.
6844 VisitAllBases
6845 };
6846
6847 // Visit the bases and members of the class.
6848 bool visit(BasesToVisit Bases) {
6849 CXXRecordDecl *RD = MD->getParent();
6850
6851 if (Bases == VisitPotentiallyConstructedBases)
6852 Bases = RD->isAbstract() ? VisitNonVirtualBases : VisitAllBases;
6853
6854 for (auto &B : RD->bases())
6855 if ((Bases == VisitDirectBases || !B.isVirtual()) &&
6856 getDerived().visitBase(&B))
6857 return true;
6858
6859 if (Bases == VisitAllBases)
6860 for (auto &B : RD->vbases())
6861 if (getDerived().visitBase(&B))
6862 return true;
6863
6864 for (auto *F : RD->fields())
6865 if (!F->isInvalidDecl() && !F->isUnnamedBitfield() &&
6866 getDerived().visitField(F))
6867 return true;
6868
6869 return false;
6870 }
6871 };
6872 }
6873
6874 namespace {
6875 struct SpecialMemberDeletionInfo
6876 : SpecialMemberVisitor<SpecialMemberDeletionInfo> {
6877 bool Diagnose;
6878
6879 SourceLocation Loc;
6880
6881 bool AllFieldsAreConst;
6882
6883 SpecialMemberDeletionInfo(Sema &S, CXXMethodDecl *MD,
6884 Sema::CXXSpecialMember CSM,
6885 Sema::InheritedConstructorInfo *ICI, bool Diagnose)
6886 : SpecialMemberVisitor(S, MD, CSM, ICI), Diagnose(Diagnose),
6887 Loc(MD->getLocation()), AllFieldsAreConst(true) {}
6888
6889 bool inUnion() const { return MD->getParent()->isUnion(); }
6890
6891 Sema::CXXSpecialMember getEffectiveCSM() {
6892 return ICI ? Sema::CXXInvalid : CSM;
6893 }
6894
6895 bool visitBase(CXXBaseSpecifier *Base) { return shouldDeleteForBase(Base); }
6896 bool visitField(FieldDecl *Field) { return shouldDeleteForField(Field); }
6897
6898 bool shouldDeleteForBase(CXXBaseSpecifier *Base);
6899 bool shouldDeleteForField(FieldDecl *FD);
6900 bool shouldDeleteForAllConstMembers();
6901
6902 bool shouldDeleteForClassSubobject(CXXRecordDecl *Class, Subobject Subobj,
6903 unsigned Quals);
6904 bool shouldDeleteForSubobjectCall(Subobject Subobj,
6905 Sema::SpecialMemberOverloadResult SMOR,
6906 bool IsDtorCallInCtor);
6907
6908 bool isAccessible(Subobject Subobj, CXXMethodDecl *D);
6909 };
6910 }
6911
6912 /// Is the given special member inaccessible when used on the given
6913 /// sub-object.
6914 bool SpecialMemberDeletionInfo::isAccessible(Subobject Subobj,
6915 CXXMethodDecl *target) {
6916 /// If we're operating on a base class, the object type is the
6917 /// type of this special member.
6918 QualType objectTy;
6919 AccessSpecifier access = target->getAccess();
6920 if (CXXBaseSpecifier *base = Subobj.dyn_cast<CXXBaseSpecifier*>()) {
6921 objectTy = S.Context.getTypeDeclType(MD->getParent());
6922 access = CXXRecordDecl::MergeAccess(base->getAccessSpecifier(), access);
6923
6924 // If we're operating on a field, the object type is the type of the field.
6925 } else {
6926 objectTy = S.Context.getTypeDeclType(target->getParent());
6927 }
6928
6929 return S.isSpecialMemberAccessibleForDeletion(target, access, objectTy);
6930 }
6931
6932 /// Check whether we should delete a special member due to the implicit
6933 /// definition containing a call to a special member of a subobject.
6934 bool SpecialMemberDeletionInfo::shouldDeleteForSubobjectCall(
6935 Subobject Subobj, Sema::SpecialMemberOverloadResult SMOR,
6936 bool IsDtorCallInCtor) {
6937 CXXMethodDecl *Decl = SMOR.getMethod();
6938 FieldDecl *Field = Subobj.dyn_cast<FieldDecl*>();
6939
6940 int DiagKind = -1;
6941
6942 if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted)
6943 DiagKind = !Decl ? 0 : 1;
6944 else if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::Ambiguous)
6945 DiagKind = 2;
6946 else if (!isAccessible(Subobj, Decl))
6947 DiagKind = 3;
6948 else if (!IsDtorCallInCtor && Field && Field->getParent()->isUnion() &&
6949 !Decl->isTrivial()) {
6950 // A member of a union must have a trivial corresponding special member.
6951 // As a weird special case, a destructor call from a union's constructor
6952 // must be accessible and non-deleted, but need not be trivial. Such a
6953 // destructor is never actually called, but is semantically checked as
6954 // if it were.
6955 DiagKind = 4;
6956 }
6957
6958 if (DiagKind == -1)
6959 return false;
6960
6961 if (Diagnose) {
6962 if (Field) {
6963 S.Diag(Field->getLocation(),
6964 diag::note_deleted_special_member_class_subobject)
6965 << getEffectiveCSM() << MD->getParent() << /*IsField*/true
6966 << Field << DiagKind << IsDtorCallInCtor;
6967 } else {
6968 CXXBaseSpecifier *Base = Subobj.get<CXXBaseSpecifier*>();
6969 S.Diag(Base->getBeginLoc(),
6970 diag::note_deleted_special_member_class_subobject)
6971 << getEffectiveCSM() << MD->getParent() << /*IsField*/ false
6972 << Base->getType() << DiagKind << IsDtorCallInCtor;
6973 }
6974
6975 if (DiagKind == 1)
6976 S.NoteDeletedFunction(Decl);
6977 // FIXME: Explain inaccessibility if DiagKind == 3.
6978 }
6979
6980 return true;
6981 }
6982
6983 /// Check whether we should delete a special member function due to having a
6984 /// direct or virtual base class or non-static data member of class type M.
6985 bool SpecialMemberDeletionInfo::shouldDeleteForClassSubobject(
6986 CXXRecordDecl *Class, Subobject Subobj, unsigned Quals) {
6987 FieldDecl *Field = Subobj.dyn_cast<FieldDecl*>();
6988 bool IsMutable = Field && Field->isMutable();
6989
6990 // C++11 [class.ctor]p5:
6991 // -- any direct or virtual base class, or non-static data member with no
6992 // brace-or-equal-initializer, has class type M (or array thereof) and
6993 // either M has no default constructor or overload resolution as applied
6994 // to M's default constructor results in an ambiguity or in a function
6995 // that is deleted or inaccessible
6996 // C++11 [class.copy]p11, C++11 [class.copy]p23:
6997 // -- a direct or virtual base class B that cannot be copied/moved because
6998 // overload resolution, as applied to B's corresponding special member,
6999 // results in an ambiguity or a function that is deleted or inaccessible
7000 // from the defaulted special member
7001 // C++11 [class.dtor]p5:
7002 // -- any direct or virtual base class [...] has a type with a destructor
7003 // that is deleted or inaccessible
7004 if (!(CSM == Sema::CXXDefaultConstructor &&
7005 Field && Field->hasInClassInitializer()) &&
7006 shouldDeleteForSubobjectCall(Subobj, lookupIn(Class, Quals, IsMutable),
7007 false))
7008 return true;
7009
7010 // C++11 [class.ctor]p5, C++11 [class.copy]p11:
7011 // -- any direct or virtual base class or non-static data member has a
7012 // type with a destructor that is deleted or inaccessible
7013 if (IsConstructor) {
7014 Sema::SpecialMemberOverloadResult SMOR =
7015 S.LookupSpecialMember(Class, Sema::CXXDestructor,
7016 false, false, false, false, false);
7017 if (shouldDeleteForSubobjectCall(Subobj, SMOR, true))
7018 return true;
7019 }
7020
7021 return false;
7022 }
7023
7024 /// Check whether we should delete a special member function due to the class
7025 /// having a particular direct or virtual base class.
7026 bool SpecialMemberDeletionInfo::shouldDeleteForBase(CXXBaseSpecifier *Base) {
7027 CXXRecordDecl *BaseClass = Base->getType()->getAsCXXRecordDecl();
7028 // If program is correct, BaseClass cannot be null, but if it is, the error
7029 // must be reported elsewhere.
7030 if (!BaseClass)
7031 return false;
7032 // If we have an inheriting constructor, check whether we're calling an
7033 // inherited constructor instead of a default constructor.
7034 Sema::SpecialMemberOverloadResult SMOR = lookupInheritedCtor(BaseClass);
7035 if (auto *BaseCtor = SMOR.getMethod()) {
7036 // Note that we do not check access along this path; other than that,
7037 // this is the same as shouldDeleteForSubobjectCall(Base, BaseCtor, false);
7038 // FIXME: Check that the base has a usable destructor! Sink this into
7039 // shouldDeleteForClassSubobject.
7040 if (BaseCtor->isDeleted() && Diagnose) {
7041 S.Diag(Base->getBeginLoc(),
7042 diag::note_deleted_special_member_class_subobject)
7043 << getEffectiveCSM() << MD->getParent() << /*IsField*/ false
7044 << Base->getType() << /*Deleted*/ 1 << /*IsDtorCallInCtor*/ false;
7045 S.NoteDeletedFunction(BaseCtor);
7046 }
7047 return BaseCtor->isDeleted();
7048 }
7049 return shouldDeleteForClassSubobject(BaseClass, Base, 0);
7050 }
7051
7052 /// Check whether we should delete a special member function due to the class
7053 /// having a particular non-static data member.
7054 bool SpecialMemberDeletionInfo::shouldDeleteForField(FieldDecl *FD) {
7055 QualType FieldType = S.Context.getBaseElementType(FD->getType());
7056 CXXRecordDecl *FieldRecord = FieldType->getAsCXXRecordDecl();
7057
7058 if (CSM == Sema::CXXDefaultConstructor) {
7059 // For a default constructor, all references must be initialized in-class
7060 // and, if a union, it must have a non-const member.
7061 if (FieldType->isReferenceType() && !FD->hasInClassInitializer()) {
7062 if (Diagnose)
7063 S.Diag(FD->getLocation(), diag::note_deleted_default_ctor_uninit_field)
7064 << !!ICI << MD->getParent() << FD << FieldType << /*Reference*/0;
7065 return true;
7066 }
7067 // C++11 [class.ctor]p5: any non-variant non-static data member of
7068 // const-qualified type (or array thereof) with no
7069 // brace-or-equal-initializer does not have a user-provided default
7070 // constructor.
7071 if (!inUnion() && FieldType.isConstQualified() &&
7072 !FD->hasInClassInitializer() &&
7073 (!FieldRecord || !FieldRecord->hasUserProvidedDefaultConstructor())) {
7074 if (Diagnose)
7075 S.Diag(FD->getLocation(), diag::note_deleted_default_ctor_uninit_field)
7076 << !!ICI << MD->getParent() << FD << FD->getType() << /*Const*/1;
7077 return true;
7078 }
7079
7080 if (inUnion() && !FieldType.isConstQualified())
7081 AllFieldsAreConst = false;
7082 } else if (CSM == Sema::CXXCopyConstructor) {
7083 // For a copy constructor, data members must not be of rvalue reference
7084 // type.
7085 if (FieldType->isRValueReferenceType()) {
7086 if (Diagnose)
7087 S.Diag(FD->getLocation(), diag::note_deleted_copy_ctor_rvalue_reference)
7088 << MD->getParent() << FD << FieldType;
7089 return true;
7090 }
7091 } else if (IsAssignment) {
7092 // For an assignment operator, data members must not be of reference type.
7093 if (FieldType->isReferenceType()) {
7094 if (Diagnose)
7095 S.Diag(FD->getLocation(), diag::note_deleted_assign_field)
7096 << isMove() << MD->getParent() << FD << FieldType << /*Reference*/0;
7097 return true;
7098 }
7099 if (!FieldRecord && FieldType.isConstQualified()) {
7100 // C++11 [class.copy]p23:
7101 // -- a non-static data member of const non-class type (or array thereof)
7102 if (Diagnose)
7103 S.Diag(FD->getLocation(), diag::note_deleted_assign_field)
7104 << isMove() << MD->getParent() << FD << FD->getType() << /*Const*/1;
7105 return true;
7106 }
7107 }
7108
7109 if (FieldRecord) {
7110 // Some additional restrictions exist on the variant members.
7111 if (!inUnion() && FieldRecord->isUnion() &&
7112 FieldRecord->isAnonymousStructOrUnion()) {
7113 bool AllVariantFieldsAreConst = true;
7114
7115 // FIXME: Handle anonymous unions declared within anonymous unions.
7116 for (auto *UI : FieldRecord->fields()) {
7117 QualType UnionFieldType = S.Context.getBaseElementType(UI->getType());
7118
7119 if (!UnionFieldType.isConstQualified())
7120 AllVariantFieldsAreConst = false;
7121
7122 CXXRecordDecl *UnionFieldRecord = UnionFieldType->getAsCXXRecordDecl();
7123 if (UnionFieldRecord &&
7124 shouldDeleteForClassSubobject(UnionFieldRecord, UI,
7125 UnionFieldType.getCVRQualifiers()))
7126 return true;
7127 }
7128
7129 // At least one member in each anonymous union must be non-const
7130 if (CSM == Sema::CXXDefaultConstructor && AllVariantFieldsAreConst &&
7131 !FieldRecord->field_empty()) {
7132 if (Diagnose)
7133 S.Diag(FieldRecord->getLocation(),
7134 diag::note_deleted_default_ctor_all_const)
7135 << !!ICI << MD->getParent() << /*anonymous union*/1;
7136 return true;
7137 }
7138
7139 // Don't check the implicit member of the anonymous union type.
7140 // This is technically non-conformant, but sanity demands it.
7141 return false;
7142 }
7143
7144 if (shouldDeleteForClassSubobject(FieldRecord, FD,
7145 FieldType.getCVRQualifiers()))
7146 return true;
7147 }
7148
7149 return false;
7150 }
7151
7152 /// C++11 [class.ctor] p5:
7153 /// A defaulted default constructor for a class X is defined as deleted if
7154 /// X is a union and all of its variant members are of const-qualified type.
7155 bool SpecialMemberDeletionInfo::shouldDeleteForAllConstMembers() {
7156 // This is a silly definition, because it gives an empty union a deleted
7157 // default constructor. Don't do that.
7158 if (CSM == Sema::CXXDefaultConstructor && inUnion() && AllFieldsAreConst) {
7159 bool AnyFields = false;
7160 for (auto *F : MD->getParent()->fields())
7161 if ((AnyFields = !F->isUnnamedBitfield()))
7162 break;
7163 if (!AnyFields)
7164 return false;
7165 if (Diagnose)
7166 S.Diag(MD->getParent()->getLocation(),
7167 diag::note_deleted_default_ctor_all_const)
7168 << !!ICI << MD->getParent() << /*not anonymous union*/0;
7169 return true;
7170 }
7171 return false;
7172 }
7173
7174 /// Determine whether a defaulted special member function should be defined as
7175 /// deleted, as specified in C++11 [class.ctor]p5, C++11 [class.copy]p11,
7176 /// C++11 [class.copy]p23, and C++11 [class.dtor]p5.
7177 bool Sema::ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM,
7178 InheritedConstructorInfo *ICI,
7179 bool Diagnose) {
7180 if (MD->isInvalidDecl())
7181 return false;
7182 CXXRecordDecl *RD = MD->getParent();
7183 assert(!RD->isDependentType() && "do deletion after instantiation");
7184 if (!LangOpts.CPlusPlus11 || RD->isInvalidDecl())
7185 return false;
7186
7187 // C++11 [expr.lambda.prim]p19:
7188 // The closure type associated with a lambda-expression has a
7189 // deleted (8.4.3) default constructor and a deleted copy
7190 // assignment operator.
7191 // C++2a adds back these operators if the lambda has no capture-default.
7192 if (RD->isLambda() && !RD->lambdaIsDefaultConstructibleAndAssignable() &&
7193 (CSM == CXXDefaultConstructor || CSM == CXXCopyAssignment)) {
7194 if (Diagnose)
7195 Diag(RD->getLocation(), diag::note_lambda_decl);
7196 return true;
7197 }
7198
7199 // For an anonymous struct or union, the copy and assignment special members
7200 // will never be used, so skip the check. For an anonymous union declared at
7201 // namespace scope, the constructor and destructor are used.
7202 if (CSM != CXXDefaultConstructor && CSM != CXXDestructor &&
7203 RD->isAnonymousStructOrUnion())
7204 return false;
7205
7206 // C++11 [class.copy]p7, p18:
7207 // If the class definition declares a move constructor or move assignment
7208 // operator, an implicitly declared copy constructor or copy assignment
7209 // operator is defined as deleted.
7210 if (MD->isImplicit() &&
7211 (CSM == CXXCopyConstructor || CSM == CXXCopyAssignment)) {
7212 CXXMethodDecl *UserDeclaredMove = nullptr;
7213
7214 // In Microsoft mode up to MSVC 2013, a user-declared move only causes the
7215 // deletion of the corresponding copy operation, not both copy operations.
7216 // MSVC 2015 has adopted the standards conforming behavior.
7217 bool DeletesOnlyMatchingCopy =
7218 getLangOpts().MSVCCompat &&
7219 !getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015);
7220
7221 if (RD->hasUserDeclaredMoveConstructor() &&
7222 (!DeletesOnlyMatchingCopy || CSM == CXXCopyConstructor)) {
7223 if (!Diagnose) return true;
7224
7225 // Find any user-declared move constructor.
7226 for (auto *I : RD->ctors()) {
7227 if (I->isMoveConstructor()) {
7228 UserDeclaredMove = I;
7229 break;
7230 }
7231 }
7232 assert(UserDeclaredMove);
7233 } else if (RD->hasUserDeclaredMoveAssignment() &&
7234 (!DeletesOnlyMatchingCopy || CSM == CXXCopyAssignment)) {
7235 if (!Diagnose) return true;
7236
7237 // Find any user-declared move assignment operator.
7238 for (auto *I : RD->methods()) {
7239 if (I->isMoveAssignmentOperator()) {
7240 UserDeclaredMove = I;
7241 break;
7242 }
7243 }
7244 assert(UserDeclaredMove);
7245 }
7246
7247 if (UserDeclaredMove) {
7248 Diag(UserDeclaredMove->getLocation(),
7249 diag::note_deleted_copy_user_declared_move)
7250 << (CSM == CXXCopyAssignment) << RD
7251 << UserDeclaredMove->isMoveAssignmentOperator();
7252 return true;
7253 }
7254 }
7255
7256 // Do access control from the special member function
7257 ContextRAII MethodContext(*this, MD);
7258
7259 // C++11 [class.dtor]p5:
7260 // -- for a virtual destructor, lookup of the non-array deallocation function
7261 // results in an ambiguity or in a function that is deleted or inaccessible
7262 if (CSM == CXXDestructor && MD->isVirtual()) {
7263 FunctionDecl *OperatorDelete = nullptr;
7264 DeclarationName Name =
7265 Context.DeclarationNames.getCXXOperatorName(OO_Delete);
7266 if (FindDeallocationFunction(MD->getLocation(), MD->getParent(), Name,
7267 OperatorDelete, /*Diagnose*/false)) {
7268 if (Diagnose)
7269 Diag(RD->getLocation(), diag::note_deleted_dtor_no_operator_delete);
7270 return true;
7271 }
7272 }
7273
7274 SpecialMemberDeletionInfo SMI(*this, MD, CSM, ICI, Diagnose);
7275
7276 // Per DR1611, do not consider virtual bases of constructors of abstract
7277 // classes, since we are not going to construct them.
7278 // Per DR1658, do not consider virtual bases of destructors of abstract
7279 // classes either.
7280 // Per DR2180, for assignment operators we only assign (and thus only
7281 // consider) direct bases.
7282 if (SMI.visit(SMI.IsAssignment ? SMI.VisitDirectBases
7283 : SMI.VisitPotentiallyConstructedBases))
7284 return true;
7285
7286 if (SMI.shouldDeleteForAllConstMembers())
7287 return true;
7288
7289 if (getLangOpts().CUDA) {
7290 // We should delete the special member in CUDA mode if target inference
7291 // failed.
7292 // For inherited constructors (non-null ICI), CSM may be passed so that MD
7293 // is treated as certain special member, which may not reflect what special
7294 // member MD really is. However inferCUDATargetForImplicitSpecialMember
7295 // expects CSM to match MD, therefore recalculate CSM.
7296 assert(ICI || CSM == getSpecialMember(MD));
7297 auto RealCSM = CSM;
7298 if (ICI)
7299 RealCSM = getSpecialMember(MD);
7300
7301 return inferCUDATargetForImplicitSpecialMember(RD, RealCSM, MD,
7302 SMI.ConstArg, Diagnose);
7303 }
7304
7305 return false;
7306 }
7307
7308 /// Perform lookup for a special member of the specified kind, and determine
7309 /// whether it is trivial. If the triviality can be determined without the
7310 /// lookup, skip it. This is intended for use when determining whether a
7311 /// special member of a containing object is trivial, and thus does not ever
7312 /// perform overload resolution for default constructors.
7313 ///
7314 /// If \p Selected is not \c NULL, \c *Selected will be filled in with the
7315 /// member that was most likely to be intended to be trivial, if any.
7316 ///
7317 /// If \p ForCall is true, look at CXXRecord::HasTrivialSpecialMembersForCall to
7318 /// determine whether the special member is trivial.
7319 static bool findTrivialSpecialMember(Sema &S, CXXRecordDecl *RD,
7320 Sema::CXXSpecialMember CSM, unsigned Quals,
7321 bool ConstRHS,
7322 Sema::TrivialABIHandling TAH,
7323 CXXMethodDecl **Selected) {
7324 if (Selected)
7325 *Selected = nullptr;
7326
7327 switch (CSM) {
7328 case Sema::CXXInvalid:
7329 llvm_unreachable("not a special member");
7330
7331 case Sema::CXXDefaultConstructor:
7332 // C++11 [class.ctor]p5:
7333 // A default constructor is trivial if:
7334 // - all the [direct subobjects] have trivial default constructors
7335 //
7336 // Note, no overload resolution is performed in this case.
7337 if (RD->hasTrivialDefaultConstructor())
7338 return true;
7339
7340 if (Selected) {
7341 // If there's a default constructor which could have been trivial, dig it
7342 // out. Otherwise, if there's any user-provided default constructor, point
7343 // to that as an example of why there's not a trivial one.
7344 CXXConstructorDecl *DefCtor = nullptr;
7345 if (RD->needsImplicitDefaultConstructor())
7346 S.DeclareImplicitDefaultConstructor(RD);
7347 for (auto *CI : RD->ctors()) {
7348 if (!CI->isDefaultConstructor())
7349 continue;
7350 DefCtor = CI;
7351 if (!DefCtor->isUserProvided())
7352 break;
7353 }
7354
7355 *Selected = DefCtor;
7356 }
7357
7358 return false;
7359
7360 case Sema::CXXDestructor:
7361 // C++11 [class.dtor]p5:
7362 // A destructor is trivial if:
7363 // - all the direct [subobjects] have trivial destructors
7364 if (RD->hasTrivialDestructor() ||
7365 (TAH == Sema::TAH_ConsiderTrivialABI &&
7366 RD->hasTrivialDestructorForCall()))
7367 return true;
7368
7369 if (Selected) {
7370 if (RD->needsImplicitDestructor())
7371 S.DeclareImplicitDestructor(RD);
7372 *Selected = RD->getDestructor();
7373 }
7374
7375 return false;
7376
7377 case Sema::CXXCopyConstructor:
7378 // C++11 [class.copy]p12:
7379 // A copy constructor is trivial if:
7380 // - the constructor selected to copy each direct [subobject] is trivial
7381 if (RD->hasTrivialCopyConstructor() ||
7382 (TAH == Sema::TAH_ConsiderTrivialABI &&
7383 RD->hasTrivialCopyConstructorForCall())) {
7384 if (Quals == Qualifiers::Const)
7385 // We must either select the trivial copy constructor or reach an
7386 // ambiguity; no need to actually perform overload resolution.
7387 return true;
7388 } else if (!Selected) {
7389 return false;
7390 }
7391 // In C++98, we are not supposed to perform overload resolution here, but we
7392 // treat that as a language defect, as suggested on cxx-abi-dev, to treat
7393 // cases like B as having a non-trivial copy constructor:
7394 // struct A { template<typename T> A(T&); };
7395 // struct B { mutable A a; };
7396 goto NeedOverloadResolution;
7397
7398 case Sema::CXXCopyAssignment:
7399 // C++11 [class.copy]p25:
7400 // A copy assignment operator is trivial if:
7401 // - the assignment operator selected to copy each direct [subobject] is
7402 // trivial
7403 if (RD->hasTrivialCopyAssignment()) {
7404 if (Quals == Qualifiers::Const)
7405 return true;
7406 } else if (!Selected) {
7407 return false;
7408 }
7409 // In C++98, we are not supposed to perform overload resolution here, but we
7410 // treat that as a language defect.
7411 goto NeedOverloadResolution;
7412
7413 case Sema::CXXMoveConstructor:
7414 case Sema::CXXMoveAssignment:
7415 NeedOverloadResolution:
7416 Sema::SpecialMemberOverloadResult SMOR =
7417 lookupCallFromSpecialMember(S, RD, CSM, Quals, ConstRHS);
7418
7419 // The standard doesn't describe how to behave if the lookup is ambiguous.
7420 // We treat it as not making the member non-trivial, just like the standard
7421 // mandates for the default constructor. This should rarely matter, because
7422 // the member will also be deleted.
7423 if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::Ambiguous)
7424 return true;
7425
7426 if (!SMOR.getMethod()) {
7427 assert(SMOR.getKind() ==
7428 Sema::SpecialMemberOverloadResult::NoMemberOrDeleted);
7429 return false;
7430 }
7431
7432 // We deliberately don't check if we found a deleted special member. We're
7433 // not supposed to!
7434 if (Selected)
7435 *Selected = SMOR.getMethod();
7436
7437 if (TAH == Sema::TAH_ConsiderTrivialABI &&
7438 (CSM == Sema::CXXCopyConstructor || CSM == Sema::CXXMoveConstructor))
7439 return SMOR.getMethod()->isTrivialForCall();
7440 return SMOR.getMethod()->isTrivial();
7441 }
7442
7443 llvm_unreachable("unknown special method kind");
7444 }
7445
7446 static CXXConstructorDecl *findUserDeclaredCtor(CXXRecordDecl *RD) {
7447 for (auto *CI : RD->ctors())
7448 if (!CI->isImplicit())
7449 return CI;
7450
7451 // Look for constructor templates.
7452 typedef CXXRecordDecl::specific_decl_iterator<FunctionTemplateDecl> tmpl_iter;
7453 for (tmpl_iter TI(RD->decls_begin()), TE(RD->decls_end()); TI != TE; ++TI) {
7454 if (CXXConstructorDecl *CD =
7455 dyn_cast<CXXConstructorDecl>(TI->getTemplatedDecl()))
7456 return CD;
7457 }
7458
7459 return nullptr;
7460 }
7461
7462 /// The kind of subobject we are checking for triviality. The values of this
7463 /// enumeration are used in diagnostics.
7464 enum TrivialSubobjectKind {
7465 /// The subobject is a base class.
7466 TSK_BaseClass,
7467 /// The subobject is a non-static data member.
7468 TSK_Field,
7469 /// The object is actually the complete object.
7470 TSK_CompleteObject
7471 };
7472
7473 /// Check whether the special member selected for a given type would be trivial.
7474 static bool checkTrivialSubobjectCall(Sema &S, SourceLocation SubobjLoc,
7475 QualType SubType, bool ConstRHS,
7476 Sema::CXXSpecialMember CSM,
7477 TrivialSubobjectKind Kind,
7478 Sema::TrivialABIHandling TAH, bool Diagnose) {
7479 CXXRecordDecl *SubRD = SubType->getAsCXXRecordDecl();
7480 if (!SubRD)
7481 return true;
7482
7483 CXXMethodDecl *Selected;
7484 if (findTrivialSpecialMember(S, SubRD, CSM, SubType.getCVRQualifiers(),
7485 ConstRHS, TAH, Diagnose ? &Selected : nullptr))
7486 return true;
7487
7488 if (Diagnose) {
7489 if (ConstRHS)
7490 SubType.addConst();
7491
7492 if (!Selected && CSM == Sema::CXXDefaultConstructor) {
7493 S.Diag(SubobjLoc, diag::note_nontrivial_no_def_ctor)
7494 << Kind << SubType.getUnqualifiedType();
7495 if (CXXConstructorDecl *CD = findUserDeclaredCtor(SubRD))
7496 S.Diag(CD->getLocation(), diag::note_user_declared_ctor);
7497 } else if (!Selected)
7498 S.Diag(SubobjLoc, diag::note_nontrivial_no_copy)
7499 << Kind << SubType.getUnqualifiedType() << CSM << SubType;
7500 else if (Selected->isUserProvided()) {
7501 if (Kind == TSK_CompleteObject)
7502 S.Diag(Selected->getLocation(), diag::note_nontrivial_user_provided)
7503 << Kind << SubType.getUnqualifiedType() << CSM;
7504 else {
7505 S.Diag(SubobjLoc, diag::note_nontrivial_user_provided)
7506 << Kind << SubType.getUnqualifiedType() << CSM;
7507 S.Diag(Selected->getLocation(), diag::note_declared_at);
7508 }
7509 } else {
7510 if (Kind != TSK_CompleteObject)
7511 S.Diag(SubobjLoc, diag::note_nontrivial_subobject)
7512 << Kind << SubType.getUnqualifiedType() << CSM;
7513
7514 // Explain why the defaulted or deleted special member isn't trivial.
7515 S.SpecialMemberIsTrivial(Selected, CSM, Sema::TAH_IgnoreTrivialABI,
7516 Diagnose);
7517 }
7518 }
7519
7520 return false;
7521 }
7522
7523 /// Check whether the members of a class type allow a special member to be
7524 /// trivial.
7525 static bool checkTrivialClassMembers(Sema &S, CXXRecordDecl *RD,
7526 Sema::CXXSpecialMember CSM,
7527 bool ConstArg,
7528 Sema::TrivialABIHandling TAH,
7529 bool Diagnose) {
7530 for (const auto *FI : RD->fields()) {
7531 if (FI->isInvalidDecl() || FI->isUnnamedBitfield())
7532 continue;
7533
7534 QualType FieldType = S.Context.getBaseElementType(FI->getType());
7535
7536 // Pretend anonymous struct or union members are members of this class.
7537 if (FI->isAnonymousStructOrUnion()) {
7538 if (!checkTrivialClassMembers(S, FieldType->getAsCXXRecordDecl(),
7539 CSM, ConstArg, TAH, Diagnose))
7540 return false;
7541 continue;
7542 }
7543
7544 // C++11 [class.ctor]p5:
7545 // A default constructor is trivial if [...]
7546 // -- no non-static data member of its class has a
7547 // brace-or-equal-initializer
7548 if (CSM == Sema::CXXDefaultConstructor && FI->hasInClassInitializer()) {
7549 if (Diagnose)
7550 S.Diag(FI->getLocation(), diag::note_nontrivial_in_class_init) << FI;
7551 return false;
7552 }
7553
7554 // Objective C ARC 4.3.5:
7555 // [...] nontrivally ownership-qualified types are [...] not trivially
7556 // default constructible, copy constructible, move constructible, copy
7557 // assignable, move assignable, or destructible [...]
7558 if (FieldType.hasNonTrivialObjCLifetime()) {
7559 if (Diagnose)
7560 S.Diag(FI->getLocation(), diag::note_nontrivial_objc_ownership)
7561 << RD << FieldType.getObjCLifetime();
7562 return false;
7563 }
7564
7565 bool ConstRHS = ConstArg && !FI->isMutable();
7566 if (!checkTrivialSubobjectCall(S, FI->getLocation(), FieldType, ConstRHS,
7567 CSM, TSK_Field, TAH, Diagnose))
7568 return false;
7569 }
7570
7571 return true;
7572 }
7573
7574 /// Diagnose why the specified class does not have a trivial special member of
7575 /// the given kind.
7576 void Sema::DiagnoseNontrivial(const CXXRecordDecl *RD, CXXSpecialMember CSM) {
7577 QualType Ty = Context.getRecordType(RD);
7578
7579 bool ConstArg = (CSM == CXXCopyConstructor || CSM == CXXCopyAssignment);
7580 checkTrivialSubobjectCall(*this, RD->getLocation(), Ty, ConstArg, CSM,
7581 TSK_CompleteObject, TAH_IgnoreTrivialABI,
7582 /*Diagnose*/true);
7583 }
7584
7585 /// Determine whether a defaulted or deleted special member function is trivial,
7586 /// as specified in C++11 [class.ctor]p5, C++11 [class.copy]p12,
7587 /// C++11 [class.copy]p25, and C++11 [class.dtor]p5.
7588 bool Sema::SpecialMemberIsTrivial(CXXMethodDecl *MD, CXXSpecialMember CSM,
7589 TrivialABIHandling TAH, bool Diagnose) {
7590 assert(!MD->isUserProvided() && CSM != CXXInvalid && "not special enough");
7591
7592 CXXRecordDecl *RD = MD->getParent();
7593
7594 bool ConstArg = false;
7595
7596 // C++11 [class.copy]p12, p25: [DR1593]
7597 // A [special member] is trivial if [...] its parameter-type-list is
7598 // equivalent to the parameter-type-list of an implicit declaration [...]
7599 switch (CSM) {
7600 case CXXDefaultConstructor:
7601 case CXXDestructor:
7602 // Trivial default constructors and destructors cannot have parameters.
7603 break;
7604
7605 case CXXCopyConstructor:
7606 case CXXCopyAssignment: {
7607 // Trivial copy operations always have const, non-volatile parameter types.
7608 ConstArg = true;
7609 const ParmVarDecl *Param0 = MD->getParamDecl(0);
7610 const ReferenceType *RT = Param0->getType()->getAs<ReferenceType>();
7611 if (!RT || RT->getPointeeType().getCVRQualifiers() != Qualifiers::Const) {
7612 if (Diagnose)
7613 Diag(Param0->getLocation(), diag::note_nontrivial_param_type)
7614 << Param0->getSourceRange() << Param0->getType()
7615 << Context.getLValueReferenceType(
7616 Context.getRecordType(RD).withConst());
7617 return false;
7618 }
7619 break;
7620 }
7621
7622 case CXXMoveConstructor:
7623 case CXXMoveAssignment: {
7624 // Trivial move operations always have non-cv-qualified parameters.
7625 const ParmVarDecl *Param0 = MD->getParamDecl(0);
7626 const RValueReferenceType *RT =
7627 Param0->getType()->getAs<RValueReferenceType>();
7628 if (!RT || RT->getPointeeType().getCVRQualifiers()) {
7629 if (Diagnose)
7630 Diag(Param0->getLocation(), diag::note_nontrivial_param_type)
7631 << Param0->getSourceRange() << Param0->getType()
7632 << Context.getRValueReferenceType(Context.getRecordType(RD));
7633 return false;
7634 }
7635 break;
7636 }
7637
7638 case CXXInvalid:
7639 llvm_unreachable("not a special member");
7640 }
7641
7642 if (MD->getMinRequiredArguments() < MD->getNumParams()) {
7643 if (Diagnose)
7644 Diag(MD->getParamDecl(MD->getMinRequiredArguments())->getLocation(),
7645 diag::note_nontrivial_default_arg)
7646 << MD->getParamDecl(MD->getMinRequiredArguments())->getSourceRange();
7647 return false;
7648 }
7649 if (MD->isVariadic()) {
7650 if (Diagnose)
7651 Diag(MD->getLocation(), diag::note_nontrivial_variadic);
7652 return false;
7653 }
7654
7655 // C++11 [class.ctor]p5, C++11 [class.dtor]p5:
7656 // A copy/move [constructor or assignment operator] is trivial if
7657 // -- the [member] selected to copy/move each direct base class subobject
7658 // is trivial
7659 //
7660 // C++11 [class.copy]p12, C++11 [class.copy]p25:
7661 // A [default constructor or destructor] is trivial if
7662 // -- all the direct base classes have trivial [default constructors or
7663 // destructors]
7664 for (const auto &BI : RD->bases())
7665 if (!checkTrivialSubobjectCall(*this, BI.getBeginLoc(), BI.getType(),
7666 ConstArg, CSM, TSK_BaseClass, TAH, Diagnose))
7667 return false;
7668
7669 // C++11 [class.ctor]p5, C++11 [class.dtor]p5:
7670 // A copy/move [constructor or assignment operator] for a class X is
7671 // trivial if
7672 // -- for each non-static data member of X that is of class type (or array
7673 // thereof), the constructor selected to copy/move that member is
7674 // trivial
7675 //
7676 // C++11 [class.copy]p12, C++11 [class.copy]p25:
7677 // A [default constructor or destructor] is trivial if
7678 // -- for all of the non-static data members of its class that are of class
7679 // type (or array thereof), each such class has a trivial [default
7680 // constructor or destructor]
7681 if (!checkTrivialClassMembers(*this, RD, CSM, ConstArg, TAH, Diagnose))
7682 return false;
7683
7684 // C++11 [class.dtor]p5:
7685 // A destructor is trivial if [...]
7686 // -- the destructor is not virtual
7687 if (CSM == CXXDestructor && MD->isVirtual()) {
7688 if (Diagnose)
7689 Diag(MD->getLocation(), diag::note_nontrivial_virtual_dtor) << RD;
7690 return false;
7691 }
7692
7693 // C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25:
7694 // A [special member] for class X is trivial if [...]
7695 // -- class X has no virtual functions and no virtual base classes
7696 if (CSM != CXXDestructor && MD->getParent()->isDynamicClass()) {
7697 if (!Diagnose)
7698 return false;
7699
7700 if (RD->getNumVBases()) {
7701 // Check for virtual bases. We already know that the corresponding
7702 // member in all bases is trivial, so vbases must all be direct.
7703 CXXBaseSpecifier &BS = *RD->vbases_begin();
7704 assert(BS.isVirtual());
7705 Diag(BS.getBeginLoc(), diag::note_nontrivial_has_virtual) << RD << 1;
7706 return false;
7707 }
7708
7709 // Must have a virtual method.
7710 for (const auto *MI : RD->methods()) {
7711 if (MI->isVirtual()) {
7712 SourceLocation MLoc = MI->getBeginLoc();
7713 Diag(MLoc, diag::note_nontrivial_has_virtual) << RD << 0;
7714 return false;
7715 }
7716 }
7717
7718 llvm_unreachable("dynamic class with no vbases and no virtual functions");
7719 }
7720
7721 // Looks like it's trivial!
7722 return true;
7723 }
7724
7725 namespace {
7726 struct FindHiddenVirtualMethod {
7727 Sema *S;
7728 CXXMethodDecl *Method;
7729 llvm::SmallPtrSet<const CXXMethodDecl *, 8> OverridenAndUsingBaseMethods;
7730 SmallVector<CXXMethodDecl *, 8> OverloadedMethods;
7731
7732 private:
7733 /// Check whether any most overridden method from MD in Methods
7734 static bool CheckMostOverridenMethods(
7735 const CXXMethodDecl *MD,
7736 const llvm::SmallPtrSetImpl<const CXXMethodDecl *> &Methods) {
7737 if (MD->size_overridden_methods() == 0)
7738 return Methods.count(MD->getCanonicalDecl());
7739 for (const CXXMethodDecl *O : MD->overridden_methods())
7740 if (CheckMostOverridenMethods(O, Methods))
7741 return true;
7742 return false;
7743 }
7744
7745 public:
7746 /// Member lookup function that determines whether a given C++
7747 /// method overloads virtual methods in a base class without overriding any,
7748 /// to be used with CXXRecordDecl::lookupInBases().
7749 bool operator()(const CXXBaseSpecifier *Specifier, CXXBasePath &Path) {
7750 RecordDecl *BaseRecord =
7751 Specifier->getType()->getAs<RecordType>()->getDecl();
7752
7753 DeclarationName Name = Method->getDeclName();
7754 assert(Name.getNameKind() == DeclarationName::Identifier);
7755
7756 bool foundSameNameMethod = false;
7757 SmallVector<CXXMethodDecl *, 8> overloadedMethods;
7758 for (Path.Decls = BaseRecord->lookup(Name); !Path.Decls.empty();
7759 Path.Decls = Path.Decls.slice(1)) {
7760 NamedDecl *D = Path.Decls.front();
7761 if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) {
7762 MD = MD->getCanonicalDecl();
7763 foundSameNameMethod = true;
7764 // Interested only in hidden virtual methods.
7765 if (!MD->isVirtual())
7766 continue;
7767 // If the method we are checking overrides a method from its base
7768 // don't warn about the other overloaded methods. Clang deviates from
7769 // GCC by only diagnosing overloads of inherited virtual functions that
7770 // do not override any other virtual functions in the base. GCC's
7771 // -Woverloaded-virtual diagnoses any derived function hiding a virtual
7772 // function from a base class. These cases may be better served by a
7773 // warning (not specific to virtual functions) on call sites when the
7774 // call would select a different function from the base class, were it
7775 // visible.
7776 // See FIXME in test/SemaCXX/warn-overload-virtual.cpp for an example.
7777 if (!S->IsOverload(Method, MD, false))
7778 return true;
7779 // Collect the overload only if its hidden.
7780 if (!CheckMostOverridenMethods(MD, OverridenAndUsingBaseMethods))
7781 overloadedMethods.push_back(MD);
7782 }
7783 }
7784
7785 if (foundSameNameMethod)
7786 OverloadedMethods.append(overloadedMethods.begin(),
7787 overloadedMethods.end());
7788 return foundSameNameMethod;
7789 }
7790 };
7791 } // end anonymous namespace
7792
7793 /// Add the most overriden methods from MD to Methods
7794 static void AddMostOverridenMethods(const CXXMethodDecl *MD,
7795 llvm::SmallPtrSetImpl<const CXXMethodDecl *>& Methods) {
7796 if (MD->size_overridden_methods() == 0)
7797 Methods.insert(MD->getCanonicalDecl());
7798 else
7799 for (const CXXMethodDecl *O : MD->overridden_methods())
7800 AddMostOverridenMethods(O, Methods);
7801 }
7802
7803 /// Check if a method overloads virtual methods in a base class without
7804 /// overriding any.
7805 void Sema::FindHiddenVirtualMethods(CXXMethodDecl *MD,
7806 SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods) {
7807 if (!MD->getDeclName().isIdentifier())
7808 return;
7809
7810 CXXBasePaths Paths(/*FindAmbiguities=*/true, // true to look in all bases.
7811 /*bool RecordPaths=*/false,
7812 /*bool DetectVirtual=*/false);
7813 FindHiddenVirtualMethod FHVM;
7814 FHVM.Method = MD;
7815 FHVM.S = this;
7816
7817 // Keep the base methods that were overridden or introduced in the subclass
7818 // by 'using' in a set. A base method not in this set is hidden.
7819 CXXRecordDecl *DC = MD->getParent();
7820 DeclContext::lookup_result R = DC->lookup(MD->getDeclName());
7821 for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) {
7822 NamedDecl *ND = *I;
7823 if (UsingShadowDecl *shad = dyn_cast<UsingShadowDecl>(*I))
7824 ND = shad->getTargetDecl();
7825 if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(ND))
7826 AddMostOverridenMethods(MD, FHVM.OverridenAndUsingBaseMethods);
7827 }
7828
7829 if (DC->lookupInBases(FHVM, Paths))
7830 OverloadedMethods = FHVM.OverloadedMethods;
7831 }
7832
7833 void Sema::NoteHiddenVirtualMethods(CXXMethodDecl *MD,
7834 SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods) {
7835 for (unsigned i = 0, e = OverloadedMethods.size(); i != e; ++i) {
7836 CXXMethodDecl *overloadedMD = OverloadedMethods[i];
7837 PartialDiagnostic PD = PDiag(
7838 diag::note_hidden_overloaded_virtual_declared_here) << overloadedMD;
7839 HandleFunctionTypeMismatch(PD, MD->getType(), overloadedMD->getType());
7840 Diag(overloadedMD->getLocation(), PD);
7841 }
7842 }
7843
7844 /// Diagnose methods which overload virtual methods in a base class
7845 /// without overriding any.
7846 void Sema::DiagnoseHiddenVirtualMethods(CXXMethodDecl *MD) {
7847 if (MD->isInvalidDecl())
7848 return;
7849
7850 if (Diags.isIgnored(diag::warn_overloaded_virtual, MD->getLocation()))
7851 return;
7852
7853 SmallVector<CXXMethodDecl *, 8> OverloadedMethods;
7854 FindHiddenVirtualMethods(MD, OverloadedMethods);
7855 if (!OverloadedMethods.empty()) {
7856 Diag(MD->getLocation(), diag::warn_overloaded_virtual)
7857 << MD << (OverloadedMethods.size() > 1);
7858
7859 NoteHiddenVirtualMethods(MD, OverloadedMethods);
7860 }
7861 }
7862
7863 void Sema::checkIllFormedTrivialABIStruct(CXXRecordDecl &RD) {
7864 auto PrintDiagAndRemoveAttr = [&]() {
7865 // No diagnostics if this is a template instantiation.
7866 if (!isTemplateInstantiation(RD.getTemplateSpecializationKind()))
7867 Diag(RD.getAttr<TrivialABIAttr>()->getLocation(),
7868 diag::ext_cannot_use_trivial_abi) << &RD;
7869 RD.dropAttr<TrivialABIAttr>();
7870 };
7871
7872 // Ill-formed if the struct has virtual functions.
7873 if (RD.isPolymorphic()) {
7874 PrintDiagAndRemoveAttr();
7875 return;
7876 }
7877
7878 for (const auto &B : RD.bases()) {
7879 // Ill-formed if the base class is non-trivial for the purpose of calls or a
7880 // virtual base.
7881 if ((!B.getType()->isDependentType() &&
7882 !B.getType()->getAsCXXRecordDecl()->canPassInRegisters()) ||
7883 B.isVirtual()) {
7884 PrintDiagAndRemoveAttr();
7885 return;
7886 }
7887 }
7888
7889 for (const auto *FD : RD.fields()) {
7890 // Ill-formed if the field is an ObjectiveC pointer or of a type that is
7891 // non-trivial for the purpose of calls.
7892 QualType FT = FD->getType();
7893 if (FT.getObjCLifetime() == Qualifiers::OCL_Weak) {
7894 PrintDiagAndRemoveAttr();
7895 return;
7896 }
7897
7898 if (const auto *RT = FT->getBaseElementTypeUnsafe()->getAs<RecordType>())
7899 if (!RT->isDependentType() &&
7900 !cast<CXXRecordDecl>(RT->getDecl())->canPassInRegisters()) {
7901 PrintDiagAndRemoveAttr();
7902 return;
7903 }
7904 }
7905 }
7906
7907 void Sema::ActOnFinishCXXMemberSpecification(
7908 Scope *S, SourceLocation RLoc, Decl *TagDecl, SourceLocation LBrac,
7909 SourceLocation RBrac, const ParsedAttributesView &AttrList) {
7910 if (!TagDecl)
7911 return;
7912
7913 AdjustDeclIfTemplate(TagDecl);
7914
7915 for (const ParsedAttr &AL : AttrList) {
7916 if (AL.getKind() != ParsedAttr::AT_Visibility)
7917 continue;
7918 AL.setInvalid();
7919 Diag(AL.getLoc(), diag::warn_attribute_after_definition_ignored)
7920 << AL.getName();
7921 }
7922
7923 ActOnFields(S, RLoc, TagDecl, llvm::makeArrayRef(
7924 // strict aliasing violation!
7925 reinterpret_cast<Decl**>(FieldCollector->getCurFields()),
7926 FieldCollector->getCurNumFields()), LBrac, RBrac, AttrList);
7927
7928 CheckCompletedCXXClass(cast<CXXRecordDecl>(TagDecl));
7929 }
7930
7931 /// AddImplicitlyDeclaredMembersToClass - Adds any implicitly-declared
7932 /// special functions, such as the default constructor, copy
7933 /// constructor, or destructor, to the given C++ class (C++
7934 /// [special]p1). This routine can only be executed just before the
7935 /// definition of the class is complete.
7936 void Sema::AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl) {
7937 if (ClassDecl->needsImplicitDefaultConstructor()) {
7938 ++ASTContext::NumImplicitDefaultConstructors;
7939
7940 if (ClassDecl->hasInheritedConstructor())
7941 DeclareImplicitDefaultConstructor(ClassDecl);
7942 }
7943
7944 if (ClassDecl->needsImplicitCopyConstructor()) {
7945 ++ASTContext::NumImplicitCopyConstructors;
7946
7947 // If the properties or semantics of the copy constructor couldn't be
7948 // determined while the class was being declared, force a declaration
7949 // of it now.
7950 if (ClassDecl->needsOverloadResolutionForCopyConstructor() ||
7951 ClassDecl->hasInheritedConstructor())
7952 DeclareImplicitCopyConstructor(ClassDecl);
7953 // For the MS ABI we need to know whether the copy ctor is deleted. A
7954 // prerequisite for deleting the implicit copy ctor is that the class has a
7955 // move ctor or move assignment that is either user-declared or whose
7956 // semantics are inherited from a subobject. FIXME: We should provide a more
7957 // direct way for CodeGen to ask whether the constructor was deleted.
7958 else if (Context.getTargetInfo().getCXXABI().isMicrosoft() &&
7959 (ClassDecl->hasUserDeclaredMoveConstructor() ||
7960 ClassDecl->needsOverloadResolutionForMoveConstructor() ||
7961 ClassDecl->hasUserDeclaredMoveAssignment() ||
7962 ClassDecl->needsOverloadResolutionForMoveAssignment()))
7963 DeclareImplicitCopyConstructor(ClassDecl);
7964 }
7965
7966 if (getLangOpts().CPlusPlus11 && ClassDecl->needsImplicitMoveConstructor()) {
7967 ++ASTContext::NumImplicitMoveConstructors;
7968
7969 if (ClassDecl->needsOverloadResolutionForMoveConstructor() ||
7970 ClassDecl->hasInheritedConstructor())
7971 DeclareImplicitMoveConstructor(ClassDecl);
7972 }
7973
7974 if (ClassDecl->needsImplicitCopyAssignment()) {
7975 ++ASTContext::NumImplicitCopyAssignmentOperators;
7976
7977 // If we have a dynamic class, then the copy assignment operator may be
7978 // virtual, so we have to declare it immediately. This ensures that, e.g.,
7979 // it shows up in the right place in the vtable and that we diagnose
7980 // problems with the implicit exception specification.
7981 if (ClassDecl->isDynamicClass() ||
7982 ClassDecl->needsOverloadResolutionForCopyAssignment() ||
7983 ClassDecl->hasInheritedAssignment())
7984 DeclareImplicitCopyAssignment(ClassDecl);
7985 }
7986
7987 if (getLangOpts().CPlusPlus11 && ClassDecl->needsImplicitMoveAssignment()) {
7988 ++ASTContext::NumImplicitMoveAssignmentOperators;
7989
7990 // Likewise for the move assignment operator.
7991 if (ClassDecl->isDynamicClass() ||
7992 ClassDecl->needsOverloadResolutionForMoveAssignment() ||
7993 ClassDecl->hasInheritedAssignment())
7994 DeclareImplicitMoveAssignment(ClassDecl);
7995 }
7996
7997 if (ClassDecl->needsImplicitDestructor()) {
7998 ++ASTContext::NumImplicitDestructors;
7999
8000 // If we have a dynamic class, then the destructor may be virtual, so we
8001 // have to declare the destructor immediately. This ensures that, e.g., it
8002 // shows up in the right place in the vtable and that we diagnose problems
8003 // with the implicit exception specification.
8004 if (ClassDecl->isDynamicClass() ||
8005 ClassDecl->needsOverloadResolutionForDestructor())
8006 DeclareImplicitDestructor(ClassDecl);
8007 }
8008 }
8009
8010 unsigned Sema::ActOnReenterTemplateScope(Scope *S, Decl *D) {
8011 if (!D)
8012 return 0;
8013
8014 // The order of template parameters is not important here. All names
8015 // get added to the same scope.
8016 SmallVector<TemplateParameterList *, 4> ParameterLists;
8017
8018 if (TemplateDecl *TD = dyn_cast<TemplateDecl>(D))
8019 D = TD->getTemplatedDecl();
8020
8021 if (auto *PSD = dyn_cast<ClassTemplatePartialSpecializationDecl>(D))
8022 ParameterLists.push_back(PSD->getTemplateParameters());
8023
8024 if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)) {
8025 for (unsigned i = 0; i < DD->getNumTemplateParameterLists(); ++i)
8026 ParameterLists.push_back(DD->getTemplateParameterList(i));
8027
8028 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
8029 if (FunctionTemplateDecl *FTD = FD->getDescribedFunctionTemplate())
8030 ParameterLists.push_back(FTD->getTemplateParameters());
8031 }
8032 }
8033
8034 if (TagDecl *TD = dyn_cast<TagDecl>(D)) {
8035 for (unsigned i = 0; i < TD->getNumTemplateParameterLists(); ++i)
8036 ParameterLists.push_back(TD->getTemplateParameterList(i));
8037
8038 if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(TD)) {
8039 if (ClassTemplateDecl *CTD = RD->getDescribedClassTemplate())
8040 ParameterLists.push_back(CTD->getTemplateParameters());
8041 }
8042 }
8043
8044 unsigned Count = 0;
8045 for (TemplateParameterList *Params : ParameterLists) {
8046 if (Params->size() > 0)
8047 // Ignore explicit specializations; they don't contribute to the template
8048 // depth.
8049 ++Count;
8050 for (NamedDecl *Param : *Params) {
8051 if (Param->getDeclName()) {
8052 S->AddDecl(Param);
8053 IdResolver.AddDecl(Param);
8054 }
8055 }
8056 }
8057
8058 return Count;
8059 }
8060
8061 void Sema::ActOnStartDelayedMemberDeclarations(Scope *S, Decl *RecordD) {
8062 if (!RecordD) return;
8063 AdjustDeclIfTemplate(RecordD);
8064 CXXRecordDecl *Record = cast<CXXRecordDecl>(RecordD);
8065 PushDeclContext(S, Record);
8066 }
8067
8068 void Sema::ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *RecordD) {
8069 if (!RecordD) return;
8070 PopDeclContext();
8071 }
8072
8073 /// This is used to implement the constant expression evaluation part of the
8074 /// attribute enable_if extension. There is nothing in standard C++ which would
8075 /// require reentering parameters.
8076 void Sema::ActOnReenterCXXMethodParameter(Scope *S, ParmVarDecl *Param) {
8077 if (!Param)
8078 return;
8079
8080 S->AddDecl(Param);
8081 if (Param->getDeclName())
8082 IdResolver.AddDecl(Param);
8083 }
8084
8085 /// ActOnStartDelayedCXXMethodDeclaration - We have completed
8086 /// parsing a top-level (non-nested) C++ class, and we are now
8087 /// parsing those parts of the given Method declaration that could
8088 /// not be parsed earlier (C++ [class.mem]p2), such as default
8089 /// arguments. This action should enter the scope of the given
8090 /// Method declaration as if we had just parsed the qualified method
8091 /// name. However, it should not bring the parameters into scope;
8092 /// that will be performed by ActOnDelayedCXXMethodParameter.
8093 void Sema::ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *MethodD) {
8094 }
8095
8096 /// ActOnDelayedCXXMethodParameter - We've already started a delayed
8097 /// C++ method declaration. We're (re-)introducing the given
8098 /// function parameter into scope for use in parsing later parts of
8099 /// the method declaration. For example, we could see an
8100 /// ActOnParamDefaultArgument event for this parameter.
8101 void Sema::ActOnDelayedCXXMethodParameter(Scope *S, Decl *ParamD) {
8102 if (!ParamD)
8103 return;
8104
8105 ParmVarDecl *Param = cast<ParmVarDecl>(ParamD);
8106
8107 // If this parameter has an unparsed default argument, clear it out
8108 // to make way for the parsed default argument.
8109 if (Param->hasUnparsedDefaultArg())
8110 Param->setDefaultArg(nullptr);
8111
8112 S->AddDecl(Param);
8113 if (Param->getDeclName())
8114 IdResolver.AddDecl(Param);
8115 }
8116
8117 /// ActOnFinishDelayedCXXMethodDeclaration - We have finished
8118 /// processing the delayed method declaration for Method. The method
8119 /// declaration is now considered finished. There may be a separate
8120 /// ActOnStartOfFunctionDef action later (not necessarily
8121 /// immediately!) for this method, if it was also defined inside the
8122 /// class body.
8123 void Sema::ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *MethodD) {
8124 if (!MethodD)
8125 return;
8126
8127 AdjustDeclIfTemplate(MethodD);
8128
8129 FunctionDecl *Method = cast<FunctionDecl>(MethodD);
8130
8131 // Now that we have our default arguments, check the constructor
8132 // again. It could produce additional diagnostics or affect whether
8133 // the class has implicitly-declared destructors, among other
8134 // things.
8135 if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(Method))
8136 CheckConstructor(Constructor);
8137
8138 // Check the default arguments, which we may have added.
8139 if (!Method->isInvalidDecl())
8140 CheckCXXDefaultArguments(Method);
8141 }
8142
8143 /// CheckConstructorDeclarator - Called by ActOnDeclarator to check
8144 /// the well-formedness of the constructor declarator @p D with type @p
8145 /// R. If there are any errors in the declarator, this routine will
8146 /// emit diagnostics and set the invalid bit to true. In any case, the type
8147 /// will be updated to reflect a well-formed type for the constructor and
8148 /// returned.
8149 QualType Sema::CheckConstructorDeclarator(Declarator &D, QualType R,
8150 StorageClass &SC) {
8151 bool isVirtual = D.getDeclSpec().isVirtualSpecified();
8152
8153 // C++ [class.ctor]p3:
8154 // A constructor shall not be virtual (10.3) or static (9.4). A
8155 // constructor can be invoked for a const, volatile or const
8156 // volatile object. A constructor shall not be declared const,
8157 // volatile, or const volatile (9.3.2).
8158 if (isVirtual) {
8159 if (!D.isInvalidType())
8160 Diag(D.getIdentifierLoc(), diag::err_constructor_cannot_be)
8161 << "virtual" << SourceRange(D.getDeclSpec().getVirtualSpecLoc())
8162 << SourceRange(D.getIdentifierLoc());
8163 D.setInvalidType();
8164 }
8165 if (SC == SC_Static) {
8166 if (!D.isInvalidType())
8167 Diag(D.getIdentifierLoc(), diag::err_constructor_cannot_be)
8168 << "static" << SourceRange(D.getDeclSpec().getStorageClassSpecLoc())
8169 << SourceRange(D.getIdentifierLoc());
8170 D.setInvalidType();
8171 SC = SC_None;
8172 }
8173
8174 if (unsigned TypeQuals = D.getDeclSpec().getTypeQualifiers()) {
8175 diagnoseIgnoredQualifiers(
8176 diag::err_constructor_return_type, TypeQuals, SourceLocation(),
8177 D.getDeclSpec().getConstSpecLoc(), D.getDeclSpec().getVolatileSpecLoc(),
8178 D.getDeclSpec().getRestrictSpecLoc(),
8179 D.getDeclSpec().getAtomicSpecLoc());
8180 D.setInvalidType();
8181 }
8182
8183 DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo();
8184 if (FTI.hasMethodTypeQualifiers()) {
8185 FTI.MethodQualifiers->forEachQualifier(
8186 [&](DeclSpec::TQ TypeQual, StringRef QualName, SourceLocation SL) {
8187 Diag(SL, diag::err_invalid_qualified_constructor)
8188 << QualName << SourceRange(SL);
8189 });
8190 D.setInvalidType();
8191 }
8192
8193 // C++0x [class.ctor]p4:
8194 // A constructor shall not be declared with a ref-qualifier.
8195 if (FTI.hasRefQualifier()) {
8196 Diag(FTI.getRefQualifierLoc(), diag::err_ref_qualifier_constructor)
8197 << FTI.RefQualifierIsLValueRef
8198 << FixItHint::CreateRemoval(FTI.getRefQualifierLoc());
8199 D.setInvalidType();
8200 }
8201
8202 // Rebuild the function type "R" without any type qualifiers (in
8203 // case any of the errors above fired) and with "void" as the
8204 // return type, since constructors don't have return types.
8205 const FunctionProtoType *Proto = R->getAs<FunctionProtoType>();
8206 if (Proto->getReturnType() == Context.VoidTy && !D.isInvalidType())
8207 return R;
8208
8209 FunctionProtoType::ExtProtoInfo EPI = Proto->getExtProtoInfo();
8210 EPI.TypeQuals = Qualifiers();
8211 EPI.RefQualifier = RQ_None;
8212
8213 return Context.getFunctionType(Context.VoidTy, Proto->getParamTypes(), EPI);
8214 }
8215
8216 /// CheckConstructor - Checks a fully-formed constructor for
8217 /// well-formedness, issuing any diagnostics required. Returns true if
8218 /// the constructor declarator is invalid.
8219 void Sema::CheckConstructor(CXXConstructorDecl *Constructor) {
8220 CXXRecordDecl *ClassDecl
8221 = dyn_cast<CXXRecordDecl>(Constructor->getDeclContext());
8222 if (!ClassDecl)
8223 return Constructor->setInvalidDecl();
8224
8225 // C++ [class.copy]p3:
8226 // A declaration of a constructor for a class X is ill-formed if
8227 // its first parameter is of type (optionally cv-qualified) X and
8228 // either there are no other parameters or else all other
8229 // parameters have default arguments.
8230 if (!Constructor->isInvalidDecl() &&
8231 ((Constructor->getNumParams() == 1) ||
8232 (Constructor->getNumParams() > 1 &&
8233 Constructor->getParamDecl(1)->hasDefaultArg())) &&
8234 Constructor->getTemplateSpecializationKind()
8235 != TSK_ImplicitInstantiation) {
8236 QualType ParamType = Constructor->getParamDecl(0)->getType();
8237 QualType ClassTy = Context.getTagDeclType(ClassDecl);
8238 if (Context.getCanonicalType(ParamType).getUnqualifiedType() == ClassTy) {
8239 SourceLocation ParamLoc = Constructor->getParamDecl(0)->getLocation();
8240 const char *ConstRef
8241 = Constructor->getParamDecl(0)->getIdentifier() ? "const &"
8242 : " const &";
8243 Diag(ParamLoc, diag::err_constructor_byvalue_arg)
8244 << FixItHint::CreateInsertion(ParamLoc, ConstRef);
8245
8246 // FIXME: Rather that making the constructor invalid, we should endeavor
8247 // to fix the type.
8248 Constructor->setInvalidDecl();
8249 }
8250 }
8251 }
8252
8253 /// CheckDestructor - Checks a fully-formed destructor definition for
8254 /// well-formedness, issuing any diagnostics required. Returns true
8255 /// on error.
8256 bool Sema::CheckDestructor(CXXDestructorDecl *Destructor) {
8257 CXXRecordDecl *RD = Destructor->getParent();
8258
8259 if (!Destructor->getOperatorDelete() && Destructor->isVirtual()) {
8260 SourceLocation Loc;
8261
8262 if (!Destructor->isImplicit())
8263 Loc = Destructor->getLocation();
8264 else
8265 Loc = RD->getLocation();
8266
8267 // If we have a virtual destructor, look up the deallocation function
8268 if (FunctionDecl *OperatorDelete =
8269 FindDeallocationFunctionForDestructor(Loc, RD)) {
8270 Expr *ThisArg = nullptr;
8271
8272 // If the notional 'delete this' expression requires a non-trivial
8273 // conversion from 'this' to the type of a destroying operator delete's
8274 // first parameter, perform that conversion now.
8275 if (OperatorDelete->isDestroyingOperatorDelete()) {
8276 QualType ParamType = OperatorDelete->getParamDecl(0)->getType();
8277 if (!declaresSameEntity(ParamType->getAsCXXRecordDecl(), RD)) {
8278 // C++ [class.dtor]p13:
8279 // ... as if for the expression 'delete this' appearing in a
8280 // non-virtual destructor of the destructor's class.
8281 ContextRAII SwitchContext(*this, Destructor);
8282 ExprResult This =
8283 ActOnCXXThis(OperatorDelete->getParamDecl(0)->getLocation());
8284 assert(!This.isInvalid() && "couldn't form 'this' expr in dtor?");
8285 This = PerformImplicitConversion(This.get(), ParamType, AA_Passing);
8286 if (This.isInvalid()) {
8287 // FIXME: Register this as a context note so that it comes out
8288 // in the right order.
8289 Diag(Loc, diag::note_implicit_delete_this_in_destructor_here);
8290 return true;
8291 }
8292 ThisArg = This.get();
8293 }
8294 }
8295
8296 DiagnoseUseOfDecl(OperatorDelete, Loc);
8297 MarkFunctionReferenced(Loc, OperatorDelete);
8298 Destructor->setOperatorDelete(OperatorDelete, ThisArg);
8299 }
8300 }
8301
8302 return false;
8303 }
8304
8305 /// CheckDestructorDeclarator - Called by ActOnDeclarator to check
8306 /// the well-formednes of the destructor declarator @p D with type @p
8307 /// R. If there are any errors in the declarator, this routine will
8308 /// emit diagnostics and set the declarator to invalid. Even if this happens,
8309 /// will be updated to reflect a well-formed type for the destructor and
8310 /// returned.
8311 QualType Sema::CheckDestructorDeclarator(Declarator &D, QualType R,
8312 StorageClass& SC) {
8313 // C++ [class.dtor]p1:
8314 // [...] A typedef-name that names a class is a class-name
8315 // (7.1.3); however, a typedef-name that names a class shall not
8316 // be used as the identifier in the declarator for a destructor
8317 // declaration.
8318 QualType DeclaratorType = GetTypeFromParser(D.getName().DestructorName);
8319 if (const TypedefType *TT = DeclaratorType->getAs<TypedefType>())
8320 Diag(D.getIdentifierLoc(), diag::err_destructor_typedef_name)
8321 << DeclaratorType << isa<TypeAliasDecl>(TT->getDecl());
8322 else if (const TemplateSpecializationType *TST =
8323 DeclaratorType->getAs<TemplateSpecializationType>())
8324 if (TST->isTypeAlias())
8325 Diag(D.getIdentifierLoc(), diag::err_destructor_typedef_name)
8326 << DeclaratorType << 1;
8327
8328 // C++ [class.dtor]p2:
8329 // A destructor is used to destroy objects of its class type. A
8330 // destructor takes no parameters, and no return type can be
8331 // specified for it (not even void). The address of a destructor
8332 // shall not be taken. A destructor shall not be static. A
8333 // destructor can be invoked for a const, volatile or const
8334 // volatile object. A destructor shall not be declared const,
8335 // volatile or const volatile (9.3.2).
8336 if (SC == SC_Static) {
8337 if (!D.isInvalidType())
8338 Diag(D.getIdentifierLoc(), diag::err_destructor_cannot_be)
8339 << "static" << SourceRange(D.getDeclSpec().getStorageClassSpecLoc())
8340 << SourceRange(D.getIdentifierLoc())
8341 << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc());
8342
8343 SC = SC_None;
8344 }
8345 if (!D.isInvalidType()) {
8346 // Destructors don't have return types, but the parser will
8347 // happily parse something like:
8348 //
8349 // class X {
8350 // float ~X();
8351 // };
8352 //
8353 // The return type will be eliminated later.
8354 if (D.getDeclSpec().hasTypeSpecifier())
8355 Diag(D.getIdentifierLoc(), diag::err_destructor_return_type)
8356 << SourceRange(D.getDeclSpec().getTypeSpecTypeLoc())
8357 << SourceRange(D.getIdentifierLoc());
8358 else if (unsigned TypeQuals = D.getDeclSpec().getTypeQualifiers()) {
8359 diagnoseIgnoredQualifiers(diag::err_destructor_return_type, TypeQuals,
8360 SourceLocation(),
8361 D.getDeclSpec().getConstSpecLoc(),
8362 D.getDeclSpec().getVolatileSpecLoc(),
8363 D.getDeclSpec().getRestrictSpecLoc(),
8364 D.getDeclSpec().getAtomicSpecLoc());
8365 D.setInvalidType();
8366 }
8367 }
8368
8369 DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo();
8370 if (FTI.hasMethodTypeQualifiers() && !D.isInvalidType()) {
8371 FTI.MethodQualifiers->forEachQualifier(
8372 [&](DeclSpec::TQ TypeQual, StringRef QualName, SourceLocation SL) {
8373 Diag(SL, diag::err_invalid_qualified_destructor)
8374 << QualName << SourceRange(SL);
8375 });
8376 D.setInvalidType();
8377 }
8378
8379 // C++0x [class.dtor]p2:
8380 // A destructor shall not be declared with a ref-qualifier.
8381 if (FTI.hasRefQualifier()) {
8382 Diag(FTI.getRefQualifierLoc(), diag::err_ref_qualifier_destructor)
8383 << FTI.RefQualifierIsLValueRef
8384 << FixItHint::CreateRemoval(FTI.getRefQualifierLoc());
8385 D.setInvalidType();
8386 }
8387
8388 // Make sure we don't have any parameters.
8389 if (FTIHasNonVoidParameters(FTI)) {
8390 Diag(D.getIdentifierLoc(), diag::err_destructor_with_params);
8391
8392 // Delete the parameters.
8393 FTI.freeParams();
8394 D.setInvalidType();
8395 }
8396
8397 // Make sure the destructor isn't variadic.
8398 if (FTI.isVariadic) {
8399 Diag(D.getIdentifierLoc(), diag::err_destructor_variadic);
8400 D.setInvalidType();
8401 }
8402
8403 // Rebuild the function type "R" without any type qualifiers or
8404 // parameters (in case any of the errors above fired) and with
8405 // "void" as the return type, since destructors don't have return
8406 // types.
8407 if (!D.isInvalidType())
8408 return R;
8409
8410 const FunctionProtoType *Proto = R->getAs<FunctionProtoType>();
8411 FunctionProtoType::ExtProtoInfo EPI = Proto->getExtProtoInfo();
8412 EPI.Variadic = false;
8413 EPI.TypeQuals = Qualifiers();
8414 EPI.RefQualifier = RQ_None;
8415 return Context.getFunctionType(Context.VoidTy, None, EPI);
8416 }
8417
8418 static void extendLeft(SourceRange &R, SourceRange Before) {
8419 if (Before.isInvalid())
8420 return;
8421 R.setBegin(Before.getBegin());
8422 if (R.getEnd().isInvalid())
8423 R.setEnd(Before.getEnd());
8424 }
8425
8426 static void extendRight(SourceRange &R, SourceRange After) {
8427 if (After.isInvalid())
8428 return;
8429 if (R.getBegin().isInvalid())
8430 R.setBegin(After.getBegin());
8431 R.setEnd(After.getEnd());
8432 }
8433
8434 /// CheckConversionDeclarator - Called by ActOnDeclarator to check the
8435 /// well-formednes of the conversion function declarator @p D with
8436 /// type @p R. If there are any errors in the declarator, this routine
8437 /// will emit diagnostics and return true. Otherwise, it will return
8438 /// false. Either way, the type @p R will be updated to reflect a
8439 /// well-formed type for the conversion operator.
8440 void Sema::CheckConversionDeclarator(Declarator &D, QualType &R,
8441 StorageClass& SC) {
8442 // C++ [class.conv.fct]p1:
8443 // Neither parameter types nor return type can be specified. The
8444 // type of a conversion function (8.3.5) is "function taking no
8445 // parameter returning conversion-type-id."
8446 if (SC == SC_Static) {
8447 if (!D.isInvalidType())
8448 Diag(D.getIdentifierLoc(), diag::err_conv_function_not_member)
8449 << SourceRange(D.getDeclSpec().getStorageClassSpecLoc())
8450 << D.getName().getSourceRange();
8451 D.setInvalidType();
8452 SC = SC_None;
8453 }
8454
8455 TypeSourceInfo *ConvTSI = nullptr;
8456 QualType ConvType =
8457 GetTypeFromParser(D.getName().ConversionFunctionId, &ConvTSI);
8458
8459 const DeclSpec &DS = D.getDeclSpec();
8460 if (DS.hasTypeSpecifier() && !D.isInvalidType()) {
8461 // Conversion functions don't have return types, but the parser will
8462 // happily parse something like:
8463 //
8464 // class X {
8465 // float operator bool();
8466 // };
8467 //
8468 // The return type will be changed later anyway.
8469 Diag(D.getIdentifierLoc(), diag::err_conv_function_return_type)
8470 << SourceRange(DS.getTypeSpecTypeLoc())
8471 << SourceRange(D.getIdentifierLoc());
8472 D.setInvalidType();
8473 } else if (DS.getTypeQualifiers() && !D.isInvalidType()) {
8474 // It's also plausible that the user writes type qualifiers in the wrong
8475 // place, such as:
8476 // struct S { const operator int(); };
8477 // FIXME: we could provide a fixit to move the qualifiers onto the
8478 // conversion type.
8479 Diag(D.getIdentifierLoc(), diag::err_conv_function_with_complex_decl)
8480 << SourceRange(D.getIdentifierLoc()) << 0;
8481 D.setInvalidType();
8482 }
8483
8484 const FunctionProtoType *Proto = R->getAs<FunctionProtoType>();
8485
8486 // Make sure we don't have any parameters.
8487 if (Proto->getNumParams() > 0) {
8488 Diag(D.getIdentifierLoc(), diag::err_conv_function_with_params);
8489
8490 // Delete the parameters.
8491 D.getFunctionTypeInfo().freeParams();
8492 D.setInvalidType();
8493 } else if (Proto->isVariadic()) {
8494 Diag(D.getIdentifierLoc(), diag::err_conv_function_variadic);
8495 D.setInvalidType();
8496 }
8497
8498 // Diagnose "&operator bool()" and other such nonsense. This
8499 // is actually a gcc extension which we don't support.
8500 if (Proto->getReturnType() != ConvType) {
8501 bool NeedsTypedef = false;
8502 SourceRange Before, After;
8503
8504 // Walk the chunks and extract information on them for our diagnostic.
8505 bool PastFunctionChunk = false;
8506 for (auto &Chunk : D.type_objects()) {
8507 switch (Chunk.Kind) {
8508 case DeclaratorChunk::Function:
8509 if (!PastFunctionChunk) {
8510 if (Chunk.Fun.HasTrailingReturnType) {
8511 TypeSourceInfo *TRT = nullptr;
8512 GetTypeFromParser(Chunk.Fun.getTrailingReturnType(), &TRT);
8513 if (TRT) extendRight(After, TRT->getTypeLoc().getSourceRange());
8514 }
8515 PastFunctionChunk = true;
8516 break;
8517 }
8518 LLVM_FALLTHROUGH;
8519 case DeclaratorChunk::Array:
8520 NeedsTypedef = true;
8521 extendRight(After, Chunk.getSourceRange());
8522 break;
8523
8524 case DeclaratorChunk::Pointer:
8525 case DeclaratorChunk::BlockPointer:
8526 case DeclaratorChunk::Reference:
8527 case DeclaratorChunk::MemberPointer:
8528 case DeclaratorChunk::Pipe:
8529 extendLeft(Before, Chunk.getSourceRange());
8530 break;
8531
8532 case DeclaratorChunk::Paren:
8533 extendLeft(Before, Chunk.Loc);
8534 extendRight(After, Chunk.EndLoc);
8535 break;
8536 }
8537 }
8538
8539 SourceLocation Loc = Before.isValid() ? Before.getBegin() :
8540 After.isValid() ? After.getBegin() :
8541 D.getIdentifierLoc();
8542 auto &&DB = Diag(Loc, diag::err_conv_function_with_complex_decl);
8543 DB << Before << After;
8544
8545 if (!NeedsTypedef) {
8546 DB << /*don't need a typedef*/0;
8547
8548 // If we can provide a correct fix-it hint, do so.
8549 if (After.isInvalid() && ConvTSI) {
8550 SourceLocation InsertLoc =
8551 getLocForEndOfToken(ConvTSI->getTypeLoc().getEndLoc());
8552 DB << FixItHint::CreateInsertion(InsertLoc, " ")
8553 << FixItHint::CreateInsertionFromRange(
8554 InsertLoc, CharSourceRange::getTokenRange(Before))
8555 << FixItHint::CreateRemoval(Before);
8556 }
8557 } else if (!Proto->getReturnType()->isDependentType()) {
8558 DB << /*typedef*/1 << Proto->getReturnType();
8559 } else if (getLangOpts().CPlusPlus11) {
8560 DB << /*alias template*/2 << Proto->getReturnType();
8561 } else {
8562 DB << /*might not be fixable*/3;
8563 }
8564
8565 // Recover by incorporating the other type chunks into the result type.
8566 // Note, this does *not* change the name of the function. This is compatible
8567 // with the GCC extension:
8568 // struct S { &operator int(); } s;
8569 // int &r = s.operator int(); // ok in GCC
8570 // S::operator int&() {} // error in GCC, function name is 'operator int'.
8571 ConvType = Proto->getReturnType();
8572 }
8573
8574 // C++ [class.conv.fct]p4:
8575 // The conversion-type-id shall not represent a function type nor
8576 // an array type.
8577 if (ConvType->isArrayType()) {
8578 Diag(D.getIdentifierLoc(), diag::err_conv_function_to_array);
8579 ConvType = Context.getPointerType(ConvType);
8580 D.setInvalidType();
8581 } else if (ConvType->isFunctionType()) {
8582 Diag(D.getIdentifierLoc(), diag::err_conv_function_to_function);
8583 ConvType = Context.getPointerType(ConvType);
8584 D.setInvalidType();
8585 }
8586
8587 // Rebuild the function type "R" without any parameters (in case any
8588 // of the errors above fired) and with the conversion type as the
8589 // return type.
8590 if (D.isInvalidType())
8591 R = Context.getFunctionType(ConvType, None, Proto->getExtProtoInfo());
8592
8593 // C++0x explicit conversion operators.
8594 if (DS.isExplicitSpecified())
8595 Diag(DS.getExplicitSpecLoc(),
8596 getLangOpts().CPlusPlus11
8597 ? diag::warn_cxx98_compat_explicit_conversion_functions
8598 : diag::ext_explicit_conversion_functions)
8599 << SourceRange(DS.getExplicitSpecLoc());
8600 }
8601
8602 /// ActOnConversionDeclarator - Called by ActOnDeclarator to complete
8603 /// the declaration of the given C++ conversion function. This routine
8604 /// is responsible for recording the conversion function in the C++
8605 /// class, if possible.
8606 Decl *Sema::ActOnConversionDeclarator(CXXConversionDecl *Conversion) {
8607 assert(Conversion && "Expected to receive a conversion function declaration");
8608
8609 CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(Conversion->getDeclContext());
8610
8611 // Make sure we aren't redeclaring the conversion function.
8612 QualType ConvType = Context.getCanonicalType(Conversion->getConversionType());
8613
8614 // C++ [class.conv.fct]p1:
8615 // [...] A conversion function is never used to convert a
8616 // (possibly cv-qualified) object to the (possibly cv-qualified)
8617 // same object type (or a reference to it), to a (possibly
8618 // cv-qualified) base class of that type (or a reference to it),
8619 // or to (possibly cv-qualified) void.
8620 // FIXME: Suppress this warning if the conversion function ends up being a
8621 // virtual function that overrides a virtual function in a base class.
8622 QualType ClassType
8623 = Context.getCanonicalType(Context.getTypeDeclType(ClassDecl));
8624 if (const ReferenceType *ConvTypeRef = ConvType->getAs<ReferenceType>())
8625 ConvType = ConvTypeRef->getPointeeType();
8626 if (Conversion->getTemplateSpecializationKind() != TSK_Undeclared &&
8627 Conversion->getTemplateSpecializationKind() != TSK_ExplicitSpecialization)
8628 /* Suppress diagnostics for instantiations. */;
8629 else if (ConvType->isRecordType()) {
8630 ConvType = Context.getCanonicalType(ConvType).getUnqualifiedType();
8631 if (ConvType == ClassType)
8632 Diag(Conversion->getLocation(), diag::warn_conv_to_self_not_used)
8633 << ClassType;
8634 else if (IsDerivedFrom(Conversion->getLocation(), ClassType, ConvType))
8635 Diag(Conversion->getLocation(), diag::warn_conv_to_base_not_used)
8636 << ClassType << ConvType;
8637 } else if (ConvType->isVoidType()) {
8638 Diag(Conversion->getLocation(), diag::warn_conv_to_void_not_used)
8639 << ClassType << ConvType;
8640 }
8641
8642 if (FunctionTemplateDecl *ConversionTemplate
8643 = Conversion->getDescribedFunctionTemplate())
8644 return ConversionTemplate;
8645
8646 return Conversion;
8647 }
8648
8649 namespace {
8650 /// Utility class to accumulate and print a diagnostic listing the invalid
8651 /// specifier(s) on a declaration.
8652 struct BadSpecifierDiagnoser {
8653 BadSpecifierDiagnoser(Sema &S, SourceLocation Loc, unsigned DiagID)
8654 : S(S), Diagnostic(S.Diag(Loc, DiagID)) {}
8655 ~BadSpecifierDiagnoser() {
8656 Diagnostic << Specifiers;
8657 }
8658
8659 template<typename T> void check(SourceLocation SpecLoc, T Spec) {
8660 return check(SpecLoc, DeclSpec::getSpecifierName(Spec));
8661 }
8662 void check(SourceLocation SpecLoc, DeclSpec::TST Spec) {
8663 return check(SpecLoc,
8664 DeclSpec::getSpecifierName(Spec, S.getPrintingPolicy()));
8665 }
8666 void check(SourceLocation SpecLoc, const char *Spec) {
8667 if (SpecLoc.isInvalid()) return;
8668 Diagnostic << SourceRange(SpecLoc, SpecLoc);
8669 if (!Specifiers.empty()) Specifiers += " ";
8670 Specifiers += Spec;
8671 }
8672
8673 Sema &S;
8674 Sema::SemaDiagnosticBuilder Diagnostic;
8675 std::string Specifiers;
8676 };
8677 }
8678
8679 /// Check the validity of a declarator that we parsed for a deduction-guide.
8680 /// These aren't actually declarators in the grammar, so we need to check that
8681 /// the user didn't specify any pieces that are not part of the deduction-guide
8682 /// grammar.
8683 void Sema::CheckDeductionGuideDeclarator(Declarator &D, QualType &R,
8684 StorageClass &SC) {
8685 TemplateName GuidedTemplate = D.getName().TemplateName.get().get();
8686 TemplateDecl *GuidedTemplateDecl = GuidedTemplate.getAsTemplateDecl();
8687 assert(GuidedTemplateDecl && "missing template decl for deduction guide");
8688
8689 // C++ [temp.deduct.guide]p3:
8690 // A deduction-gide shall be declared in the same scope as the
8691 // corresponding class template.
8692 if (!CurContext->getRedeclContext()->Equals(
8693 GuidedTemplateDecl->getDeclContext()->getRedeclContext())) {
8694 Diag(D.getIdentifierLoc(), diag::err_deduction_guide_wrong_scope)
8695 << GuidedTemplateDecl;
8696 Diag(GuidedTemplateDecl->getLocation(), diag::note_template_decl_here);
8697 }
8698
8699 auto &DS = D.getMutableDeclSpec();
8700 // We leave 'friend' and 'virtual' to be rejected in the normal way.
8701 if (DS.hasTypeSpecifier() || DS.getTypeQualifiers() ||
8702 DS.getStorageClassSpecLoc().isValid() || DS.isInlineSpecified() ||
8703 DS.isNoreturnSpecified() || DS.isConstexprSpecified()) {
8704 BadSpecifierDiagnoser Diagnoser(
8705 *this, D.getIdentifierLoc(),
8706 diag::err_deduction_guide_invalid_specifier);
8707
8708 Diagnoser.check(DS.getStorageClassSpecLoc(), DS.getStorageClassSpec());
8709 DS.ClearStorageClassSpecs();
8710 SC = SC_None;
8711
8712 // 'explicit' is permitted.
8713 Diagnoser.check(DS.getInlineSpecLoc(), "inline");
8714 Diagnoser.check(DS.getNoreturnSpecLoc(), "_Noreturn");
8715 Diagnoser.check(DS.getConstexprSpecLoc(), "constexpr");
8716 DS.ClearConstexprSpec();
8717
8718 Diagnoser.check(DS.getConstSpecLoc(), "const");
8719 Diagnoser.check(DS.getRestrictSpecLoc(), "__restrict");
8720 Diagnoser.check(DS.getVolatileSpecLoc(), "volatile");
8721 Diagnoser.check(DS.getAtomicSpecLoc(), "_Atomic");
8722 Diagnoser.check(DS.getUnalignedSpecLoc(), "__unaligned");
8723 DS.ClearTypeQualifiers();
8724
8725 Diagnoser.check(DS.getTypeSpecComplexLoc(), DS.getTypeSpecComplex());
8726 Diagnoser.check(DS.getTypeSpecSignLoc(), DS.getTypeSpecSign());
8727 Diagnoser.check(DS.getTypeSpecWidthLoc(), DS.getTypeSpecWidth());
8728 Diagnoser.check(DS.getTypeSpecTypeLoc(), DS.getTypeSpecType());
8729 DS.ClearTypeSpecType();
8730 }
8731
8732 if (D.isInvalidType())
8733 return;
8734
8735 // Check the declarator is simple enough.
8736 bool FoundFunction = false;
8737 for (const DeclaratorChunk &Chunk : llvm::reverse(D.type_objects())) {
8738 if (Chunk.Kind == DeclaratorChunk::Paren)
8739 continue;
8740 if (Chunk.Kind != DeclaratorChunk::Function || FoundFunction) {
8741 Diag(D.getDeclSpec().getBeginLoc(),
8742 diag::err_deduction_guide_with_complex_decl)
8743 << D.getSourceRange();
8744 break;
8745 }
8746 if (!Chunk.Fun.hasTrailingReturnType()) {
8747 Diag(D.getName().getBeginLoc(),
8748 diag::err_deduction_guide_no_trailing_return_type);
8749 break;
8750 }
8751
8752 // Check that the return type is written as a specialization of
8753 // the template specified as the deduction-guide's name.
8754 ParsedType TrailingReturnType = Chunk.Fun.getTrailingReturnType();
8755 TypeSourceInfo *TSI = nullptr;
8756 QualType RetTy = GetTypeFromParser(TrailingReturnType, &TSI);
8757 assert(TSI && "deduction guide has valid type but invalid return type?");
8758 bool AcceptableReturnType = false;
8759 bool MightInstantiateToSpecialization = false;
8760 if (auto RetTST =
8761 TSI->getTypeLoc().getAs<TemplateSpecializationTypeLoc>()) {
8762 TemplateName SpecifiedName = RetTST.getTypePtr()->getTemplateName();
8763 bool TemplateMatches =
8764 Context.hasSameTemplateName(SpecifiedName, GuidedTemplate);
8765 if (SpecifiedName.getKind() == TemplateName::Template && TemplateMatches)
8766 AcceptableReturnType = true;
8767 else {
8768 // This could still instantiate to the right type, unless we know it
8769 // names the wrong class template.
8770 auto *TD = SpecifiedName.getAsTemplateDecl();
8771 MightInstantiateToSpecialization = !(TD && isa<ClassTemplateDecl>(TD) &&
8772 !TemplateMatches);
8773 }
8774 } else if (!RetTy.hasQualifiers() && RetTy->isDependentType()) {
8775 MightInstantiateToSpecialization = true;
8776 }
8777
8778 if (!AcceptableReturnType) {
8779 Diag(TSI->getTypeLoc().getBeginLoc(),
8780 diag::err_deduction_guide_bad_trailing_return_type)
8781 << GuidedTemplate << TSI->getType()
8782 << MightInstantiateToSpecialization
8783 << TSI->getTypeLoc().getSourceRange();
8784 }
8785
8786 // Keep going to check that we don't have any inner declarator pieces (we
8787 // could still have a function returning a pointer to a function).
8788 FoundFunction = true;
8789 }
8790
8791 if (D.isFunctionDefinition())
8792 Diag(D.getIdentifierLoc(), diag::err_deduction_guide_defines_function);
8793 }
8794
8795 //===----------------------------------------------------------------------===//
8796 // Namespace Handling
8797 //===----------------------------------------------------------------------===//
8798
8799 /// Diagnose a mismatch in 'inline' qualifiers when a namespace is
8800 /// reopened.
8801 static void DiagnoseNamespaceInlineMismatch(Sema &S, SourceLocation KeywordLoc,
8802 SourceLocation Loc,
8803 IdentifierInfo *II, bool *IsInline,
8804 NamespaceDecl *PrevNS) {
8805 assert(*IsInline != PrevNS->isInline());
8806
8807 // HACK: Work around a bug in libstdc++4.6's <atomic>, where
8808 // std::__atomic[0,1,2] are defined as non-inline namespaces, then reopened as
8809 // inline namespaces, with the intention of bringing names into namespace std.
8810 //
8811 // We support this just well enough to get that case working; this is not
8812 // sufficient to support reopening namespaces as inline in general.
8813 if (*IsInline && II && II->getName().startswith("__atomic") &&
8814 S.getSourceManager().isInSystemHeader(Loc)) {
8815 // Mark all prior declarations of the namespace as inline.
8816 for (NamespaceDecl *NS = PrevNS->getMostRecentDecl(); NS;
8817 NS = NS->getPreviousDecl())
8818 NS->setInline(*IsInline);
8819 // Patch up the lookup table for the containing namespace. This isn't really
8820 // correct, but it's good enough for this particular case.
8821 for (auto *I : PrevNS->decls())
8822 if (auto *ND = dyn_cast<NamedDecl>(I))
8823 PrevNS->getParent()->makeDeclVisibleInContext(ND);
8824 return;
8825 }
8826
8827 if (PrevNS->isInline())
8828 // The user probably just forgot the 'inline', so suggest that it
8829 // be added back.
8830 S.Diag(Loc, diag::warn_inline_namespace_reopened_noninline)
8831 << FixItHint::CreateInsertion(KeywordLoc, "inline ");
8832 else
8833 S.Diag(Loc, diag::err_inline_namespace_mismatch);
8834
8835 S.Diag(PrevNS->getLocation(), diag::note_previous_definition);
8836 *IsInline = PrevNS->isInline();
8837 }
8838
8839 /// ActOnStartNamespaceDef - This is called at the start of a namespace
8840 /// definition.
8841 Decl *Sema::ActOnStartNamespaceDef(
8842 Scope *NamespcScope, SourceLocation InlineLoc, SourceLocation NamespaceLoc,
8843 SourceLocation IdentLoc, IdentifierInfo *II, SourceLocation LBrace,
8844 const ParsedAttributesView &AttrList, UsingDirectiveDecl *&UD) {
8845 SourceLocation StartLoc = InlineLoc.isValid() ? InlineLoc : NamespaceLoc;
8846 // For anonymous namespace, take the location of the left brace.
8847 SourceLocation Loc = II ? IdentLoc : LBrace;
8848 bool IsInline = InlineLoc.isValid();
8849 bool IsInvalid = false;
8850 bool IsStd = false;
8851 bool AddToKnown = false;
8852 Scope *DeclRegionScope = NamespcScope->getParent();
8853
8854 NamespaceDecl *PrevNS = nullptr;
8855 if (II) {
8856 // C++ [namespace.def]p2:
8857 // The identifier in an original-namespace-definition shall not
8858 // have been previously defined in the declarative region in
8859 // which the original-namespace-definition appears. The
8860 // identifier in an original-namespace-definition is the name of
8861 // the namespace. Subsequently in that declarative region, it is
8862 // treated as an original-namespace-name.
8863 //
8864 // Since namespace names are unique in their scope, and we don't
8865 // look through using directives, just look for any ordinary names
8866 // as if by qualified name lookup.
8867 LookupResult R(*this, II, IdentLoc, LookupOrdinaryName,
8868 ForExternalRedeclaration);
8869 LookupQualifiedName(R, CurContext->getRedeclContext());
8870 NamedDecl *PrevDecl =
8871 R.isSingleResult() ? R.getRepresentativeDecl() : nullptr;
8872 PrevNS = dyn_cast_or_null<NamespaceDecl>(PrevDecl);
8873
8874 if (PrevNS) {
8875 // This is an extended namespace definition.
8876 if (IsInline != PrevNS->isInline())
8877 DiagnoseNamespaceInlineMismatch(*this, NamespaceLoc, Loc, II,
8878 &IsInline, PrevNS);
8879 } else if (PrevDecl) {
8880 // This is an invalid name redefinition.
8881 Diag(Loc, diag::err_redefinition_different_kind)
8882 << II;
8883 Diag(PrevDecl->getLocation(), diag::note_previous_definition);
8884 IsInvalid = true;
8885 // Continue on to push Namespc as current DeclContext and return it.
8886 } else if (II->isStr("std") &&
8887 CurContext->getRedeclContext()->isTranslationUnit()) {
8888 // This is the first "real" definition of the namespace "std", so update
8889 // our cache of the "std" namespace to point at this definition.
8890 PrevNS = getStdNamespace();
8891 IsStd = true;
8892 AddToKnown = !IsInline;
8893 } else {
8894 // We've seen this namespace for the first time.
8895 AddToKnown = !IsInline;
8896 }
8897 } else {
8898 // Anonymous namespaces.
8899
8900 // Determine whether the parent already has an anonymous namespace.
8901 DeclContext *Parent = CurContext->getRedeclContext();
8902 if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(Parent)) {
8903 PrevNS = TU->getAnonymousNamespace();
8904 } else {
8905 NamespaceDecl *ND = cast<NamespaceDecl>(Parent);
8906 PrevNS = ND->getAnonymousNamespace();
8907 }
8908
8909 if (PrevNS && IsInline != PrevNS->isInline())
8910 DiagnoseNamespaceInlineMismatch(*this, NamespaceLoc, NamespaceLoc, II,
8911 &IsInline, PrevNS);
8912 }
8913
8914 NamespaceDecl *Namespc = NamespaceDecl::Create(Context, CurContext, IsInline,
8915 StartLoc, Loc, II, PrevNS);
8916 if (IsInvalid)
8917 Namespc->setInvalidDecl();
8918
8919 ProcessDeclAttributeList(DeclRegionScope, Namespc, AttrList);
8920 AddPragmaAttributes(DeclRegionScope, Namespc);
8921
8922 // FIXME: Should we be merging attributes?
8923 if (const VisibilityAttr *Attr = Namespc->getAttr<VisibilityAttr>())
8924 PushNamespaceVisibilityAttr(Attr, Loc);
8925
8926 if (IsStd)
8927 StdNamespace = Namespc;
8928 if (AddToKnown)
8929 KnownNamespaces[Namespc] = false;
8930
8931 if (II) {
8932 PushOnScopeChains(Namespc, DeclRegionScope);
8933 } else {
8934 // Link the anonymous namespace into its parent.
8935 DeclContext *Parent = CurContext->getRedeclContext();
8936 if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(Parent)) {
8937 TU->setAnonymousNamespace(Namespc);
8938 } else {
8939 cast<NamespaceDecl>(Parent)->setAnonymousNamespace(Namespc);
8940 }
8941
8942 CurContext->addDecl(Namespc);
8943
8944 // C++ [namespace.unnamed]p1. An unnamed-namespace-definition
8945 // behaves as if it were replaced by
8946 // namespace unique { /* empty body */ }
8947 // using namespace unique;
8948 // namespace unique { namespace-body }
8949 // where all occurrences of 'unique' in a translation unit are
8950 // replaced by the same identifier and this identifier differs
8951 // from all other identifiers in the entire program.
8952
8953 // We just create the namespace with an empty name and then add an
8954 // implicit using declaration, just like the standard suggests.
8955 //
8956 // CodeGen enforces the "universally unique" aspect by giving all
8957 // declarations semantically contained within an anonymous
8958 // namespace internal linkage.
8959
8960 if (!PrevNS) {
8961 UD = UsingDirectiveDecl::Create(Context, Parent,
8962 /* 'using' */ LBrace,
8963 /* 'namespace' */ SourceLocation(),
8964 /* qualifier */ NestedNameSpecifierLoc(),
8965 /* identifier */ SourceLocation(),
8966 Namespc,
8967 /* Ancestor */ Parent);
8968 UD->setImplicit();
8969 Parent->addDecl(UD);
8970 }
8971 }
8972
8973 ActOnDocumentableDecl(Namespc);
8974
8975 // Although we could have an invalid decl (i.e. the namespace name is a
8976 // redefinition), push it as current DeclContext and try to continue parsing.
8977 // FIXME: We should be able to push Namespc here, so that the each DeclContext
8978 // for the namespace has the declarations that showed up in that particular
8979 // namespace definition.
8980 PushDeclContext(NamespcScope, Namespc);
8981 return Namespc;
8982 }
8983
8984 /// getNamespaceDecl - Returns the namespace a decl represents. If the decl
8985 /// is a namespace alias, returns the namespace it points to.
8986 static inline NamespaceDecl *getNamespaceDecl(NamedDecl *D) {
8987 if (NamespaceAliasDecl *AD = dyn_cast_or_null<NamespaceAliasDecl>(D))
8988 return AD->getNamespace();
8989 return dyn_cast_or_null<NamespaceDecl>(D);
8990 }
8991
8992 /// ActOnFinishNamespaceDef - This callback is called after a namespace is
8993 /// exited. Decl is the DeclTy returned by ActOnStartNamespaceDef.
8994 void Sema::ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace) {
8995 NamespaceDecl *Namespc = dyn_cast_or_null<NamespaceDecl>(Dcl);
8996 assert(Namespc && "Invalid parameter, expected NamespaceDecl");
8997 Namespc->setRBraceLoc(RBrace);
8998 PopDeclContext();
8999 if (Namespc->hasAttr<VisibilityAttr>())
9000 PopPragmaVisibility(true, RBrace);
9001 }
9002
9003 CXXRecordDecl *Sema::getStdBadAlloc() const {
9004 return cast_or_null<CXXRecordDecl>(
9005 StdBadAlloc.get(Context.getExternalSource()));
9006 }
9007
9008 EnumDecl *Sema::getStdAlignValT() const {
9009 return cast_or_null<EnumDecl>(StdAlignValT.get(Context.getExternalSource()));
9010 }
9011
9012 NamespaceDecl *Sema::getStdNamespace() const {
9013 return cast_or_null<NamespaceDecl>(
9014 StdNamespace.get(Context.getExternalSource()));
9015 }
9016
9017 NamespaceDecl *Sema::lookupStdExperimentalNamespace() {
9018 if (!StdExperimentalNamespaceCache) {
9019 if (auto Std = getStdNamespace()) {
9020 LookupResult Result(*this, &PP.getIdentifierTable().get("experimental"),
9021 SourceLocation(), LookupNamespaceName);
9022 if (!LookupQualifiedName(Result, Std) ||
9023 !(StdExperimentalNamespaceCache =
9024 Result.getAsSingle<NamespaceDecl>()))
9025 Result.suppressDiagnostics();
9026 }
9027 }
9028 return StdExperimentalNamespaceCache;
9029 }
9030
9031 namespace {
9032
9033 enum UnsupportedSTLSelect {
9034 USS_InvalidMember,
9035 USS_MissingMember,
9036 USS_NonTrivial,
9037 USS_Other
9038 };
9039
9040 struct InvalidSTLDiagnoser {
9041 Sema &S;
9042 SourceLocation Loc;
9043 QualType TyForDiags;
9044
9045 QualType operator()(UnsupportedSTLSelect Sel = USS_Other, StringRef Name = "",
9046 const VarDecl *VD = nullptr) {
9047 {
9048 auto D = S.Diag(Loc, diag::err_std_compare_type_not_supported)
9049 << TyForDiags << ((int)Sel);
9050 if (Sel == USS_InvalidMember || Sel == USS_MissingMember) {
9051 assert(!Name.empty());
9052 D << Name;
9053 }
9054 }
9055 if (Sel == USS_InvalidMember) {
9056 S.Diag(VD->getLocation(), diag::note_var_declared_here)
9057 << VD << VD->getSourceRange();
9058 }
9059 return QualType();
9060 }
9061 };
9062 } // namespace
9063
9064 QualType Sema::CheckComparisonCategoryType(ComparisonCategoryType Kind,
9065 SourceLocation Loc) {
9066 assert(getLangOpts().CPlusPlus &&
9067 "Looking for comparison category type outside of C++.");
9068
9069 // Check if we've already successfully checked the comparison category type
9070 // before. If so, skip checking it again.
9071 ComparisonCategoryInfo *Info = Context.CompCategories.lookupInfo(Kind);
9072 if (Info && FullyCheckedComparisonCategories[static_cast<unsigned>(Kind)])
9073 return Info->getType();
9074
9075 // If lookup failed
9076 if (!Info) {
9077 std::string NameForDiags = "std::";
9078 NameForDiags += ComparisonCategories::getCategoryString(Kind);
9079 Diag(Loc, diag::err_implied_comparison_category_type_not_found)
9080 << NameForDiags;
9081 return QualType();
9082 }
9083
9084 assert(Info->Kind == Kind);
9085 assert(Info->Record);
9086
9087 // Update the Record decl in case we encountered a forward declaration on our
9088 // first pass. FIXME: This is a bit of a hack.
9089 if (Info->Record->hasDefinition())
9090 Info->Record = Info->Record->getDefinition();
9091
9092 // Use an elaborated type for diagnostics which has a name containing the
9093 // prepended 'std' namespace but not any inline namespace names.
9094 QualType TyForDiags = [&]() {
9095 auto *NNS =
9096 NestedNameSpecifier::Create(Context, nullptr, getStdNamespace());
9097 return Context.getElaboratedType(ETK_None, NNS, Info->getType());
9098 }();
9099
9100 if (RequireCompleteType(Loc, TyForDiags, diag::err_incomplete_type))
9101 return QualType();
9102
9103 InvalidSTLDiagnoser UnsupportedSTLError{*this, Loc, TyForDiags};
9104
9105 if (!Info->Record->isTriviallyCopyable())
9106 return UnsupportedSTLError(USS_NonTrivial);
9107
9108 for (const CXXBaseSpecifier &BaseSpec : Info->Record->bases()) {
9109 CXXRecordDecl *Base = BaseSpec.getType()->getAsCXXRecordDecl();
9110 // Tolerate empty base classes.
9111 if (Base->isEmpty())
9112 continue;
9113 // Reject STL implementations which have at least one non-empty base.
9114 return UnsupportedSTLError();
9115 }
9116
9117 // Check that the STL has implemented the types using a single integer field.
9118 // This expectation allows better codegen for builtin operators. We require:
9119 // (1) The class has exactly one field.
9120 // (2) The field is an integral or enumeration type.
9121 auto FIt = Info->Record->field_begin(), FEnd = Info->Record->field_end();
9122 if (std::distance(FIt, FEnd) != 1 ||
9123 !FIt->getType()->isIntegralOrEnumerationType()) {
9124 return UnsupportedSTLError();
9125 }
9126
9127 // Build each of the require values and store them in Info.
9128 for (ComparisonCategoryResult CCR :
9129 ComparisonCategories::getPossibleResultsForType(Kind)) {
9130 StringRef MemName = ComparisonCategories::getResultString(CCR);
9131 ComparisonCategoryInfo::ValueInfo *ValInfo = Info->lookupValueInfo(CCR);
9132
9133 if (!ValInfo)
9134 return UnsupportedSTLError(USS_MissingMember, MemName);
9135
9136 VarDecl *VD = ValInfo->VD;
9137 assert(VD && "should not be null!");
9138
9139 // Attempt to diagnose reasons why the STL definition of this type
9140 // might be foobar, including it failing to be a constant expression.
9141 // TODO Handle more ways the lookup or result can be invalid.
9142 if (!VD->isStaticDataMember() || !VD->isConstexpr() || !VD->hasInit() ||
9143 !VD->checkInitIsICE())
9144 return UnsupportedSTLError(USS_InvalidMember, MemName, VD);
9145
9146 // Attempt to evaluate the var decl as a constant expression and extract
9147 // the value of its first field as a ICE. If this fails, the STL
9148 // implementation is not supported.
9149 if (!ValInfo->hasValidIntValue())
9150 return UnsupportedSTLError();
9151
9152 MarkVariableReferenced(Loc, VD);
9153 }
9154
9155 // We've successfully built the required types and expressions. Update
9156 // the cache and return the newly cached value.
9157 FullyCheckedComparisonCategories[static_cast<unsigned>(Kind)] = true;
9158 return Info->getType();
9159 }
9160
9161 /// Retrieve the special "std" namespace, which may require us to
9162 /// implicitly define the namespace.
9163 NamespaceDecl *Sema::getOrCreateStdNamespace() {
9164 if (!StdNamespace) {
9165 // The "std" namespace has not yet been defined, so build one implicitly.
9166 StdNamespace = NamespaceDecl::Create(Context,
9167 Context.getTranslationUnitDecl(),
9168 /*Inline=*/false,
9169 SourceLocation(), SourceLocation(),
9170 &PP.getIdentifierTable().get("std"),
9171 /*PrevDecl=*/nullptr);
9172 getStdNamespace()->setImplicit(true);
9173 }
9174
9175 return getStdNamespace();
9176 }
9177
9178 bool Sema::isStdInitializerList(QualType Ty, QualType *Element) {
9179 assert(getLangOpts().CPlusPlus &&
9180 "Looking for std::initializer_list outside of C++.");
9181
9182 // We're looking for implicit instantiations of
9183 // template <typename E> class std::initializer_list.
9184
9185 if (!StdNamespace) // If we haven't seen namespace std yet, this can't be it.
9186 return false;
9187
9188 ClassTemplateDecl *Template = nullptr;
9189 const TemplateArgument *Arguments = nullptr;
9190
9191 if (const RecordType *RT = Ty->getAs<RecordType>()) {
9192
9193 ClassTemplateSpecializationDecl *Specialization =
9194 dyn_cast<ClassTemplateSpecializationDecl>(RT->getDecl());
9195 if (!Specialization)
9196 return false;
9197
9198 Template = Specialization->getSpecializedTemplate();
9199 Arguments = Specialization->getTemplateArgs().data();
9200 } else if (const TemplateSpecializationType *TST =
9201 Ty->getAs<TemplateSpecializationType>()) {
9202 Template = dyn_cast_or_null<ClassTemplateDecl>(
9203 TST->getTemplateName().getAsTemplateDecl());
9204 Arguments = TST->getArgs();
9205 }
9206 if (!Template)
9207 return false;
9208
9209 if (!StdInitializerList) {
9210 // Haven't recognized std::initializer_list yet, maybe this is it.
9211 CXXRecordDecl *TemplateClass = Template->getTemplatedDecl();
9212 if (TemplateClass->getIdentifier() !=
9213 &PP.getIdentifierTable().get("initializer_list") ||
9214 !getStdNamespace()->InEnclosingNamespaceSetOf(
9215 TemplateClass->getDeclContext()))
9216 return false;
9217 // This is a template called std::initializer_list, but is it the right
9218 // template?
9219 TemplateParameterList *Params = Template->getTemplateParameters();
9220 if (Params->getMinRequiredArguments() != 1)
9221 return false;
9222 if (!isa<TemplateTypeParmDecl>(Params->getParam(0)))
9223 return false;
9224
9225 // It's the right template.
9226 StdInitializerList = Template;
9227 }
9228
9229 if (Template->getCanonicalDecl() != StdInitializerList->getCanonicalDecl())
9230 return false;
9231
9232 // This is an instance of std::initializer_list. Find the argument type.
9233 if (Element)
9234 *Element = Arguments[0].getAsType();
9235 return true;
9236 }
9237
9238 static ClassTemplateDecl *LookupStdInitializerList(Sema &S, SourceLocation Loc){
9239 NamespaceDecl *Std = S.getStdNamespace();
9240 if (!Std) {
9241 S.Diag(Loc, diag::err_implied_std_initializer_list_not_found);
9242 return nullptr;
9243 }
9244
9245 LookupResult Result(S, &S.PP.getIdentifierTable().get("initializer_list"),
9246 Loc, Sema::LookupOrdinaryName);
9247 if (!S.LookupQualifiedName(Result, Std)) {
9248 S.Diag(Loc, diag::err_implied_std_initializer_list_not_found);
9249 return nullptr;
9250 }
9251 ClassTemplateDecl *Template = Result.getAsSingle<ClassTemplateDecl>();
9252 if (!Template) {
9253 Result.suppressDiagnostics();
9254 // We found something weird. Complain about the first thing we found.
9255 NamedDecl *Found = *Result.begin();
9256 S.Diag(Found->getLocation(), diag::err_malformed_std_initializer_list);
9257 return nullptr;
9258 }
9259
9260 // We found some template called std::initializer_list. Now verify that it's
9261 // correct.
9262 TemplateParameterList *Params = Template->getTemplateParameters();
9263 if (Params->getMinRequiredArguments() != 1 ||
9264 !isa<TemplateTypeParmDecl>(Params->getParam(0))) {
9265 S.Diag(Template->getLocation(), diag::err_malformed_std_initializer_list);
9266 return nullptr;
9267 }
9268
9269 return Template;
9270 }
9271
9272 QualType Sema::BuildStdInitializerList(QualType Element, SourceLocation Loc) {
9273 if (!StdInitializerList) {
9274 StdInitializerList = LookupStdInitializerList(*this, Loc);
9275 if (!StdInitializerList)
9276 return QualType();
9277 }
9278
9279 TemplateArgumentListInfo Args(Loc, Loc);
9280 Args.addArgument(TemplateArgumentLoc(TemplateArgument(Element),
9281 Context.getTrivialTypeSourceInfo(Element,
9282 Loc)));
9283 return Context.getCanonicalType(
9284 CheckTemplateIdType(TemplateName(StdInitializerList), Loc, Args));
9285 }
9286
9287 bool Sema::isInitListConstructor(const FunctionDecl *Ctor) {
9288 // C++ [dcl.init.list]p2:
9289 // A constructor is an initializer-list constructor if its first parameter
9290 // is of type std::initializer_list<E> or reference to possibly cv-qualified
9291 // std::initializer_list<E> for some type E, and either there are no other
9292 // parameters or else all other parameters have default arguments.
9293 if (Ctor->getNumParams() < 1 ||
9294 (Ctor->getNumParams() > 1 && !Ctor->getParamDecl(1)->hasDefaultArg()))
9295 return false;
9296
9297 QualType ArgType = Ctor->getParamDecl(0)->getType();
9298 if (const ReferenceType *RT = ArgType->getAs<ReferenceType>())
9299 ArgType = RT->getPointeeType().getUnqualifiedType();
9300
9301 return isStdInitializerList(ArgType, nullptr);
9302 }
9303
9304 /// Determine whether a using statement is in a context where it will be
9305 /// apply in all contexts.
9306 static bool IsUsingDirectiveInToplevelContext(DeclContext *CurContext) {
9307 switch (CurContext->getDeclKind()) {
9308 case Decl::TranslationUnit:
9309 return true;
9310 case Decl::LinkageSpec:
9311 return IsUsingDirectiveInToplevelContext(CurContext->getParent());
9312 default:
9313 return false;
9314 }
9315 }
9316
9317 namespace {
9318
9319 // Callback to only accept typo corrections that are namespaces.
9320 class NamespaceValidatorCCC : public CorrectionCandidateCallback {
9321 public:
9322 bool ValidateCandidate(const TypoCorrection &candidate) override {
9323 if (NamedDecl *ND = candidate.getCorrectionDecl())
9324 return isa<NamespaceDecl>(ND) || isa<NamespaceAliasDecl>(ND);
9325 return false;
9326 }
9327 };
9328
9329 }
9330
9331 static bool TryNamespaceTypoCorrection(Sema &S, LookupResult &R, Scope *Sc,
9332 CXXScopeSpec &SS,
9333 SourceLocation IdentLoc,
9334 IdentifierInfo *Ident) {
9335 R.clear();
9336 if (TypoCorrection Corrected =
9337 S.CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(), Sc, &SS,
9338 llvm::make_unique<NamespaceValidatorCCC>(),
9339 Sema::CTK_ErrorRecovery)) {
9340 if (DeclContext *DC = S.computeDeclContext(SS, false)) {
9341 std::string CorrectedStr(Corrected.getAsString(S.getLangOpts()));
9342 bool DroppedSpecifier = Corrected.WillReplaceSpecifier() &&
9343 Ident->getName().equals(CorrectedStr);
9344 S.diagnoseTypo(Corrected,
9345 S.PDiag(diag::err_using_directive_member_suggest)
9346 << Ident << DC << DroppedSpecifier << SS.getRange(),
9347 S.PDiag(diag::note_namespace_defined_here));
9348 } else {
9349 S.diagnoseTypo(Corrected,
9350 S.PDiag(diag::err_using_directive_suggest) << Ident,
9351 S.PDiag(diag::note_namespace_defined_here));
9352 }
9353 R.addDecl(Corrected.getFoundDecl());
9354 return true;
9355 }
9356 return false;
9357 }
9358
9359 Decl *Sema::ActOnUsingDirective(Scope *S, SourceLocation UsingLoc,
9360 SourceLocation NamespcLoc, CXXScopeSpec &SS,
9361 SourceLocation IdentLoc,
9362 IdentifierInfo *NamespcName,
9363 const ParsedAttributesView &AttrList) {
9364 assert(!SS.isInvalid() && "Invalid CXXScopeSpec.");
9365 assert(NamespcName && "Invalid NamespcName.");
9366 assert(IdentLoc.isValid() && "Invalid NamespceName location.");
9367
9368 // This can only happen along a recovery path.
9369 while (S->isTemplateParamScope())
9370 S = S->getParent();
9371 assert(S->getFlags() & Scope::DeclScope && "Invalid Scope.");
9372
9373 UsingDirectiveDecl *UDir = nullptr;
9374 NestedNameSpecifier *Qualifier = nullptr;
9375 if (SS.isSet())
9376 Qualifier = SS.getScopeRep();
9377
9378 // Lookup namespace name.
9379 LookupResult R(*this, NamespcName, IdentLoc, LookupNamespaceName);
9380 LookupParsedName(R, S, &SS);
9381 if (R.isAmbiguous())
9382 return nullptr;
9383
9384 if (R.empty()) {
9385 R.clear();
9386 // Allow "using namespace std;" or "using namespace ::std;" even if
9387 // "std" hasn't been defined yet, for GCC compatibility.
9388 if ((!Qualifier || Qualifier->getKind() == NestedNameSpecifier::Global) &&
9389 NamespcName->isStr("std")) {
9390 Diag(IdentLoc, diag::ext_using_undefined_std);
9391 R.addDecl(getOrCreateStdNamespace());
9392 R.resolveKind();
9393 }
9394 // Otherwise, attempt typo correction.
9395 else TryNamespaceTypoCorrection(*this, R, S, SS, IdentLoc, NamespcName);
9396 }
9397
9398 if (!R.empty()) {
9399 NamedDecl *Named = R.getRepresentativeDecl();
9400 NamespaceDecl *NS = R.getAsSingle<NamespaceDecl>();
9401 assert(NS && "expected namespace decl");
9402
9403 // The use of a nested name specifier may trigger deprecation warnings.
9404 DiagnoseUseOfDecl(Named, IdentLoc);
9405
9406 // C++ [namespace.udir]p1:
9407 // A using-directive specifies that the names in the nominated
9408 // namespace can be used in the scope in which the
9409 // using-directive appears after the using-directive. During
9410 // unqualified name lookup (3.4.1), the names appear as if they
9411 // were declared in the nearest enclosing namespace which
9412 // contains both the using-directive and the nominated
9413 // namespace. [Note: in this context, "contains" means "contains
9414 // directly or indirectly". ]
9415
9416 // Find enclosing context containing both using-directive and
9417 // nominated namespace.
9418 DeclContext *CommonAncestor = NS;
9419 while (CommonAncestor && !CommonAncestor->Encloses(CurContext))
9420 CommonAncestor = CommonAncestor->getParent();
9421
9422 UDir = UsingDirectiveDecl::Create(Context, CurContext, UsingLoc, NamespcLoc,
9423 SS.getWithLocInContext(Context),
9424 IdentLoc, Named, CommonAncestor);
9425
9426 if (IsUsingDirectiveInToplevelContext(CurContext) &&
9427 !SourceMgr.isInMainFile(SourceMgr.getExpansionLoc(IdentLoc))) {
9428 Diag(IdentLoc, diag::warn_using_directive_in_header);
9429 }
9430
9431 PushUsingDirective(S, UDir);
9432 } else {
9433 Diag(IdentLoc, diag::err_expected_namespace_name) << SS.getRange();
9434 }
9435
9436 if (UDir)
9437 ProcessDeclAttributeList(S, UDir, AttrList);
9438
9439 return UDir;
9440 }
9441
9442 void Sema::PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir) {
9443 // If the scope has an associated entity and the using directive is at
9444 // namespace or translation unit scope, add the UsingDirectiveDecl into
9445 // its lookup structure so qualified name lookup can find it.
9446 DeclContext *Ctx = S->getEntity();
9447 if (Ctx && !Ctx->isFunctionOrMethod())
9448 Ctx->addDecl(UDir);
9449 else
9450 // Otherwise, it is at block scope. The using-directives will affect lookup
9451 // only to the end of the scope.
9452 S->PushUsingDirective(UDir);
9453 }
9454
9455 Decl *Sema::ActOnUsingDeclaration(Scope *S, AccessSpecifier AS,
9456 SourceLocation UsingLoc,
9457 SourceLocation TypenameLoc, CXXScopeSpec &SS,
9458 UnqualifiedId &Name,
9459 SourceLocation EllipsisLoc,
9460 const ParsedAttributesView &AttrList) {
9461 assert(S->getFlags() & Scope::DeclScope && "Invalid Scope.");
9462
9463 if (SS.isEmpty()) {
9464 Diag(Name.getBeginLoc(), diag::err_using_requires_qualname);
9465 return nullptr;
9466 }
9467
9468 switch (Name.getKind()) {
9469 case UnqualifiedIdKind::IK_ImplicitSelfParam:
9470 case UnqualifiedIdKind::IK_Identifier:
9471 case UnqualifiedIdKind::IK_OperatorFunctionId:
9472 case UnqualifiedIdKind::IK_LiteralOperatorId:
9473 case UnqualifiedIdKind::IK_ConversionFunctionId:
9474 break;
9475
9476 case UnqualifiedIdKind::IK_ConstructorName:
9477 case UnqualifiedIdKind::IK_ConstructorTemplateId:
9478 // C++11 inheriting constructors.
9479 Diag(Name.getBeginLoc(),
9480 getLangOpts().CPlusPlus11
9481 ? diag::warn_cxx98_compat_using_decl_constructor
9482 : diag::err_using_decl_constructor)
9483 << SS.getRange();
9484
9485 if (getLangOpts().CPlusPlus11) break;
9486
9487 return nullptr;
9488
9489 case UnqualifiedIdKind::IK_DestructorName:
9490 Diag(Name.getBeginLoc(), diag::err_using_decl_destructor) << SS.getRange();
9491 return nullptr;
9492
9493 case UnqualifiedIdKind::IK_TemplateId:
9494 Diag(Name.getBeginLoc(), diag::err_using_decl_template_id)
9495 << SourceRange(Name.TemplateId->LAngleLoc, Name.TemplateId->RAngleLoc);
9496 return nullptr;
9497
9498 case UnqualifiedIdKind::IK_DeductionGuideName:
9499 llvm_unreachable("cannot parse qualified deduction guide name");
9500 }
9501
9502 DeclarationNameInfo TargetNameInfo = GetNameFromUnqualifiedId(Name);
9503 DeclarationName TargetName = TargetNameInfo.getName();
9504 if (!TargetName)
9505 return nullptr;
9506
9507 // Warn about access declarations.
9508 if (UsingLoc.isInvalid()) {
9509 Diag(Name.getBeginLoc(), getLangOpts().CPlusPlus11
9510 ? diag::err_access_decl
9511 : diag::warn_access_decl_deprecated)
9512 << FixItHint::CreateInsertion(SS.getRange().getBegin(), "using ");
9513 }
9514
9515 if (EllipsisLoc.isInvalid()) {
9516 if (DiagnoseUnexpandedParameterPack(SS, UPPC_UsingDeclaration) ||
9517 DiagnoseUnexpandedParameterPack(TargetNameInfo, UPPC_UsingDeclaration))
9518 return nullptr;
9519 } else {
9520 if (!SS.getScopeRep()->containsUnexpandedParameterPack() &&
9521 !TargetNameInfo.containsUnexpandedParameterPack()) {
9522 Diag(EllipsisLoc, diag::err_pack_expansion_without_parameter_packs)
9523 << SourceRange(SS.getBeginLoc(), TargetNameInfo.getEndLoc());
9524 EllipsisLoc = SourceLocation();
9525 }
9526 }
9527
9528 NamedDecl *UD =
9529 BuildUsingDeclaration(S, AS, UsingLoc, TypenameLoc.isValid(), TypenameLoc,
9530 SS, TargetNameInfo, EllipsisLoc, AttrList,
9531 /*IsInstantiation*/false);
9532 if (UD)
9533 PushOnScopeChains(UD, S, /*AddToContext*/ false);
9534
9535 return UD;
9536 }
9537
9538 /// Determine whether a using declaration considers the given
9539 /// declarations as "equivalent", e.g., if they are redeclarations of
9540 /// the same entity or are both typedefs of the same type.
9541 static bool
9542 IsEquivalentForUsingDecl(ASTContext &Context, NamedDecl *D1, NamedDecl *D2) {
9543 if (D1->getCanonicalDecl() == D2->getCanonicalDecl())
9544 return true;
9545
9546 if (TypedefNameDecl *TD1 = dyn_cast<TypedefNameDecl>(D1))
9547 if (TypedefNameDecl *TD2 = dyn_cast<TypedefNameDecl>(D2))
9548 return Context.hasSameType(TD1->getUnderlyingType(),
9549 TD2->getUnderlyingType());
9550
9551 return false;
9552 }
9553
9554
9555 /// Determines whether to create a using shadow decl for a particular
9556 /// decl, given the set of decls existing prior to this using lookup.
9557 bool Sema::CheckUsingShadowDecl(UsingDecl *Using, NamedDecl *Orig,
9558 const LookupResult &Previous,
9559 UsingShadowDecl *&PrevShadow) {
9560 // Diagnose finding a decl which is not from a base class of the
9561 // current class. We do this now because there are cases where this
9562 // function will silently decide not to build a shadow decl, which
9563 // will pre-empt further diagnostics.
9564 //
9565 // We don't need to do this in C++11 because we do the check once on
9566 // the qualifier.
9567 //
9568 // FIXME: diagnose the following if we care enough:
9569 // struct A { int foo; };
9570 // struct B : A { using A::foo; };
9571 // template <class T> struct C : A {};
9572 // template <class T> struct D : C<T> { using B::foo; } // <---
9573 // This is invalid (during instantiation) in C++03 because B::foo
9574 // resolves to the using decl in B, which is not a base class of D<T>.
9575 // We can't diagnose it immediately because C<T> is an unknown
9576 // specialization. The UsingShadowDecl in D<T> then points directly
9577 // to A::foo, which will look well-formed when we instantiate.
9578 // The right solution is to not collapse the shadow-decl chain.
9579 if (!getLangOpts().CPlusPlus11 && CurContext->isRecord()) {
9580 DeclContext *OrigDC = Orig->getDeclContext();
9581
9582 // Handle enums and anonymous structs.
9583 if (isa<EnumDecl>(OrigDC)) OrigDC = OrigDC->getParent();
9584 CXXRecordDecl *OrigRec = cast<CXXRecordDecl>(OrigDC);
9585 while (OrigRec->isAnonymousStructOrUnion())
9586 OrigRec = cast<CXXRecordDecl>(OrigRec->getDeclContext());
9587
9588 if (cast<CXXRecordDecl>(CurContext)->isProvablyNotDerivedFrom(OrigRec)) {
9589 if (OrigDC == CurContext) {
9590 Diag(Using->getLocation(),
9591 diag::err_using_decl_nested_name_specifier_is_current_class)
9592 << Using->getQualifierLoc().getSourceRange();
9593 Diag(Orig->getLocation(), diag::note_using_decl_target);
9594 Using->setInvalidDecl();
9595 return true;
9596 }
9597
9598 Diag(Using->getQualifierLoc().getBeginLoc(),
9599 diag::err_using_decl_nested_name_specifier_is_not_base_class)
9600 << Using->getQualifier()
9601 << cast<CXXRecordDecl>(CurContext)
9602 << Using->getQualifierLoc().getSourceRange();
9603 Diag(Orig->getLocation(), diag::note_using_decl_target);
9604 Using->setInvalidDecl();
9605 return true;
9606 }
9607 }
9608
9609 if (Previous.empty()) return false;
9610
9611 NamedDecl *Target = Orig;
9612 if (isa<UsingShadowDecl>(Target))
9613 Target = cast<UsingShadowDecl>(Target)->getTargetDecl();
9614
9615 // If the target happens to be one of the previous declarations, we
9616 // don't have a conflict.
9617 //
9618 // FIXME: but we might be increasing its access, in which case we
9619 // should redeclare it.
9620 NamedDecl *NonTag = nullptr, *Tag = nullptr;
9621 bool FoundEquivalentDecl = false;
9622 for (LookupResult::iterator I = Previous.begin(), E = Previous.end();
9623 I != E; ++I) {
9624 NamedDecl *D = (*I)->getUnderlyingDecl();
9625 // We can have UsingDecls in our Previous results because we use the same
9626 // LookupResult for checking whether the UsingDecl itself is a valid
9627 // redeclaration.
9628 if (isa<UsingDecl>(D) || isa<UsingPackDecl>(D))
9629 continue;
9630
9631 if (auto *RD = dyn_cast<CXXRecordDecl>(D)) {
9632 // C++ [class.mem]p19:
9633 // If T is the name of a class, then [every named member other than
9634 // a non-static data member] shall have a name different from T
9635 if (RD->isInjectedClassName() && !isa<FieldDecl>(Target) &&
9636 !isa<IndirectFieldDecl>(Target) &&
9637 !isa<UnresolvedUsingValueDecl>(Target) &&
9638 DiagnoseClassNameShadow(
9639 CurContext,
9640 DeclarationNameInfo(Using->getDeclName(), Using->getLocation())))
9641 return true;
9642 }
9643
9644 if (IsEquivalentForUsingDecl(Context, D, Target)) {
9645 if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(*I))
9646 PrevShadow = Shadow;
9647 FoundEquivalentDecl = true;
9648 } else if (isEquivalentInternalLinkageDeclaration(D, Target)) {
9649 // We don't conflict with an existing using shadow decl of an equivalent
9650 // declaration, but we're not a redeclaration of it.
9651 FoundEquivalentDecl = true;
9652 }
9653
9654 if (isVisible(D))
9655 (isa<TagDecl>(D) ? Tag : NonTag) = D;
9656 }
9657
9658 if (FoundEquivalentDecl)
9659 return false;
9660
9661 if (FunctionDecl *FD = Target->getAsFunction()) {
9662 NamedDecl *OldDecl = nullptr;
9663 switch (CheckOverload(nullptr, FD, Previous, OldDecl,
9664 /*IsForUsingDecl*/ true)) {
9665 case Ovl_Overload:
9666 return false;
9667
9668 case Ovl_NonFunction:
9669 Diag(Using->getLocation(), diag::err_using_decl_conflict);
9670 break;
9671
9672 // We found a decl with the exact signature.
9673 case Ovl_Match:
9674 // If we're in a record, we want to hide the target, so we
9675 // return true (without a diagnostic) to tell the caller not to
9676 // build a shadow decl.
9677 if (CurContext->isRecord())
9678 return true;
9679
9680 // If we're not in a record, this is an error.
9681 Diag(Using->getLocation(), diag::err_using_decl_conflict);
9682 break;
9683 }
9684
9685 Diag(Target->getLocation(), diag::note_using_decl_target);
9686 Diag(OldDecl->getLocation(), diag::note_using_decl_conflict);
9687 Using->setInvalidDecl();
9688 return true;
9689 }
9690
9691 // Target is not a function.
9692
9693 if (isa<TagDecl>(Target)) {
9694 // No conflict between a tag and a non-tag.
9695 if (!Tag) return false;
9696
9697 Diag(Using->getLocation(), diag::err_using_decl_conflict);
9698 Diag(Target->getLocation(), diag::note_using_decl_target);
9699 Diag(Tag->getLocation(), diag::note_using_decl_conflict);
9700 Using->setInvalidDecl();
9701 return true;
9702 }
9703
9704 // No conflict between a tag and a non-tag.
9705 if (!NonTag) return false;
9706
9707 Diag(Using->getLocation(), diag::err_using_decl_conflict);
9708 Diag(Target->getLocation(), diag::note_using_decl_target);
9709 Diag(NonTag->getLocation(), diag::note_using_decl_conflict);
9710 Using->setInvalidDecl();
9711 return true;
9712 }
9713
9714 /// Determine whether a direct base class is a virtual base class.
9715 static bool isVirtualDirectBase(CXXRecordDecl *Derived, CXXRecordDecl *Base) {
9716 if (!Derived->getNumVBases())
9717 return false;
9718 for (auto &B : Derived->bases())
9719 if (B.getType()->getAsCXXRecordDecl() == Base)
9720 return B.isVirtual();
9721 llvm_unreachable("not a direct base class");
9722 }
9723
9724 /// Builds a shadow declaration corresponding to a 'using' declaration.
9725 UsingShadowDecl *Sema::BuildUsingShadowDecl(Scope *S,
9726 UsingDecl *UD,
9727 NamedDecl *Orig,
9728 UsingShadowDecl *PrevDecl) {
9729 // If we resolved to another shadow declaration, just coalesce them.
9730 NamedDecl *Target = Orig;
9731 if (isa<UsingShadowDecl>(Target)) {
9732 Target = cast<UsingShadowDecl>(Target)->getTargetDecl();
9733 assert(!isa<UsingShadowDecl>(Target) && "nested shadow declaration");
9734 }
9735
9736 NamedDecl *NonTemplateTarget = Target;
9737 if (auto *TargetTD = dyn_cast<TemplateDecl>(Target))
9738 NonTemplateTarget = TargetTD->getTemplatedDecl();
9739
9740 UsingShadowDecl *Shadow;
9741 if (isa<CXXConstructorDecl>(NonTemplateTarget)) {
9742 bool IsVirtualBase =
9743 isVirtualDirectBase(cast<CXXRecordDecl>(CurContext),
9744 UD->getQualifier()->getAsRecordDecl());
9745 Shadow = ConstructorUsingShadowDecl::Create(
9746 Context, CurContext, UD->getLocation(), UD, Orig, IsVirtualBase);
9747 } else {
9748 Shadow = UsingShadowDecl::Create(Context, CurContext, UD->getLocation(), UD,
9749 Target);
9750 }
9751 UD->addShadowDecl(Shadow);
9752
9753 Shadow->setAccess(UD->getAccess());
9754 if (Orig->isInvalidDecl() || UD->isInvalidDecl())
9755 Shadow->setInvalidDecl();
9756
9757 Shadow->setPreviousDecl(PrevDecl);
9758
9759 if (S)
9760 PushOnScopeChains(Shadow, S);
9761 else
9762 CurContext->addDecl(Shadow);
9763
9764
9765 return Shadow;
9766 }
9767
9768 /// Hides a using shadow declaration. This is required by the current
9769 /// using-decl implementation when a resolvable using declaration in a
9770 /// class is followed by a declaration which would hide or override
9771 /// one or more of the using decl's targets; for example:
9772 ///
9773 /// struct Base { void foo(int); };
9774 /// struct Derived : Base {
9775 /// using Base::foo;
9776 /// void foo(int);
9777 /// };
9778 ///
9779 /// The governing language is C++03 [namespace.udecl]p12:
9780 ///
9781 /// When a using-declaration brings names from a base class into a
9782 /// derived class scope, member functions in the derived class
9783 /// override and/or hide member functions with the same name and
9784 /// parameter types in a base class (rather than conflicting).
9785 ///
9786 /// There are two ways to implement this:
9787 /// (1) optimistically create shadow decls when they're not hidden
9788 /// by existing declarations, or
9789 /// (2) don't create any shadow decls (or at least don't make them
9790 /// visible) until we've fully parsed/instantiated the class.
9791 /// The problem with (1) is that we might have to retroactively remove
9792 /// a shadow decl, which requires several O(n) operations because the
9793 /// decl structures are (very reasonably) not designed for removal.
9794 /// (2) avoids this but is very fiddly and phase-dependent.
9795 void Sema::HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow) {
9796 if (Shadow->getDeclName().getNameKind() ==
9797 DeclarationName::CXXConversionFunctionName)
9798 cast<CXXRecordDecl>(Shadow->getDeclContext())->removeConversion(Shadow);
9799
9800 // Remove it from the DeclContext...
9801 Shadow->getDeclContext()->removeDecl(Shadow);
9802
9803 // ...and the scope, if applicable...
9804 if (S) {
9805 S->RemoveDecl(Shadow);
9806 IdResolver.RemoveDecl(Shadow);
9807 }
9808
9809 // ...and the using decl.
9810 Shadow->getUsingDecl()->removeShadowDecl(Shadow);
9811
9812 // TODO: complain somehow if Shadow was used. It shouldn't
9813 // be possible for this to happen, because...?
9814 }
9815
9816 /// Find the base specifier for a base class with the given type.
9817 static CXXBaseSpecifier *findDirectBaseWithType(CXXRecordDecl *Derived,
9818 QualType DesiredBase,
9819 bool &AnyDependentBases) {
9820 // Check whether the named type is a direct base class.
9821 CanQualType CanonicalDesiredBase = DesiredBase->getCanonicalTypeUnqualified();
9822 for (auto &Base : Derived->bases()) {
9823 CanQualType BaseType = Base.getType()->getCanonicalTypeUnqualified();
9824 if (CanonicalDesiredBase == BaseType)
9825 return &Base;
9826 if (BaseType->isDependentType())
9827 AnyDependentBases = true;
9828 }
9829 return nullptr;
9830 }
9831
9832 namespace {
9833 class UsingValidatorCCC : public CorrectionCandidateCallback {
9834 public:
9835 UsingValidatorCCC(bool HasTypenameKeyword, bool IsInstantiation,
9836 NestedNameSpecifier *NNS, CXXRecordDecl *RequireMemberOf)
9837 : HasTypenameKeyword(HasTypenameKeyword),
9838 IsInstantiation(IsInstantiation), OldNNS(NNS),
9839 RequireMemberOf(RequireMemberOf) {}
9840
9841 bool ValidateCandidate(const TypoCorrection &Candidate) override {
9842 NamedDecl *ND = Candidate.getCorrectionDecl();
9843
9844 // Keywords are not valid here.
9845 if (!ND || isa<NamespaceDecl>(ND))
9846 return false;
9847
9848 // Completely unqualified names are invalid for a 'using' declaration.
9849 if (Candidate.WillReplaceSpecifier() && !Candidate.getCorrectionSpecifier())
9850 return false;
9851
9852 // FIXME: Don't correct to a name that CheckUsingDeclRedeclaration would
9853 // reject.
9854
9855 if (RequireMemberOf) {
9856 auto *FoundRecord = dyn_cast<CXXRecordDecl>(ND);
9857 if (FoundRecord && FoundRecord->isInjectedClassName()) {
9858 // No-one ever wants a using-declaration to name an injected-class-name
9859 // of a base class, unless they're declaring an inheriting constructor.
9860 ASTContext &Ctx = ND->getASTContext();
9861 if (!Ctx.getLangOpts().CPlusPlus11)
9862 return false;
9863 QualType FoundType = Ctx.getRecordType(FoundRecord);
9864
9865 // Check that the injected-class-name is named as a member of its own
9866 // type; we don't want to suggest 'using Derived::Base;', since that
9867 // means something else.
9868 NestedNameSpecifier *Specifier =
9869 Candidate.WillReplaceSpecifier()
9870 ? Candidate.getCorrectionSpecifier()
9871 : OldNNS;
9872 if (!Specifier->getAsType() ||
9873 !Ctx.hasSameType(QualType(Specifier->getAsType(), 0), FoundType))
9874 return false;
9875
9876 // Check that this inheriting constructor declaration actually names a
9877 // direct base class of the current class.
9878 bool AnyDependentBases = false;
9879 if (!findDirectBaseWithType(RequireMemberOf,
9880 Ctx.getRecordType(FoundRecord),
9881 AnyDependentBases) &&
9882 !AnyDependentBases)
9883 return false;
9884 } else {
9885 auto *RD = dyn_cast<CXXRecordDecl>(ND->getDeclContext());
9886 if (!RD || RequireMemberOf->isProvablyNotDerivedFrom(RD))
9887 return false;
9888
9889 // FIXME: Check that the base class member is accessible?
9890 }
9891 } else {
9892 auto *FoundRecord = dyn_cast<CXXRecordDecl>(ND);
9893 if (FoundRecord && FoundRecord->isInjectedClassName())
9894 return false;
9895 }
9896
9897 if (isa<TypeDecl>(ND))
9898 return HasTypenameKeyword || !IsInstantiation;
9899
9900 return !HasTypenameKeyword;
9901 }
9902
9903 private:
9904 bool HasTypenameKeyword;
9905 bool IsInstantiation;
9906 NestedNameSpecifier *OldNNS;
9907 CXXRecordDecl *RequireMemberOf;
9908 };
9909 } // end anonymous namespace
9910
9911 /// Builds a using declaration.
9912 ///
9913 /// \param IsInstantiation - Whether this call arises from an
9914 /// instantiation of an unresolved using declaration. We treat
9915 /// the lookup differently for these declarations.
9916 NamedDecl *Sema::BuildUsingDeclaration(
9917 Scope *S, AccessSpecifier AS, SourceLocation UsingLoc,
9918 bool HasTypenameKeyword, SourceLocation TypenameLoc, CXXScopeSpec &SS,
9919 DeclarationNameInfo NameInfo, SourceLocation EllipsisLoc,
9920 const ParsedAttributesView &AttrList, bool IsInstantiation) {
9921 assert(!SS.isInvalid() && "Invalid CXXScopeSpec.");
9922 SourceLocation IdentLoc = NameInfo.getLoc();
9923 assert(IdentLoc.isValid() && "Invalid TargetName location.");
9924
9925 // FIXME: We ignore attributes for now.
9926
9927 // For an inheriting constructor declaration, the name of the using
9928 // declaration is the name of a constructor in this class, not in the
9929 // base class.
9930 DeclarationNameInfo UsingName = NameInfo;
9931 if (UsingName.getName().getNameKind() == DeclarationName::CXXConstructorName)
9932 if (auto *RD = dyn_cast<CXXRecordDecl>(CurContext))
9933 UsingName.setName(Context.DeclarationNames.getCXXConstructorName(
9934 Context.getCanonicalType(Context.getRecordType(RD))));
9935
9936 // Do the redeclaration lookup in the current scope.
9937 LookupResult Previous(*this, UsingName, LookupUsingDeclName,
9938 ForVisibleRedeclaration);
9939 Previous.setHideTags(false);
9940 if (S) {
9941 LookupName(Previous, S);
9942
9943 // It is really dumb that we have to do this.
9944 LookupResult::Filter F = Previous.makeFilter();
9945 while (F.hasNext()) {
9946 NamedDecl *D = F.next();
9947 if (!isDeclInScope(D, CurContext, S))
9948 F.erase();
9949 // If we found a local extern declaration that's not ordinarily visible,
9950 // and this declaration is being added to a non-block scope, ignore it.
9951 // We're only checking for scope conflicts here, not also for violations
9952 // of the linkage rules.
9953 else if (!CurContext->isFunctionOrMethod() && D->isLocalExternDecl() &&
9954 !(D->getIdentifierNamespace() & Decl::IDNS_Ordinary))
9955 F.erase();
9956 }
9957 F.done();
9958 } else {
9959 assert(IsInstantiation && "no scope in non-instantiation");
9960 if (CurContext->isRecord())
9961 LookupQualifiedName(Previous, CurContext);
9962 else {
9963 // No redeclaration check is needed here; in non-member contexts we
9964 // diagnosed all possible conflicts with other using-declarations when
9965 // building the template:
9966 //
9967 // For a dependent non-type using declaration, the only valid case is
9968 // if we instantiate to a single enumerator. We check for conflicts
9969 // between shadow declarations we introduce, and we check in the template
9970 // definition for conflicts between a non-type using declaration and any
9971 // other declaration, which together covers all cases.
9972 //
9973 // A dependent typename using declaration will never successfully
9974 // instantiate, since it will always name a class member, so we reject
9975 // that in the template definition.
9976 }
9977 }
9978
9979 // Check for invalid redeclarations.
9980 if (CheckUsingDeclRedeclaration(UsingLoc, HasTypenameKeyword,
9981 SS, IdentLoc, Previous))
9982 return nullptr;
9983
9984 // Check for bad qualifiers.
9985 if (CheckUsingDeclQualifier(UsingLoc, HasTypenameKeyword, SS, NameInfo,
9986 IdentLoc))
9987 return nullptr;
9988
9989 DeclContext *LookupContext = computeDeclContext(SS);
9990 NamedDecl *D;
9991 NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context);
9992 if (!LookupContext || EllipsisLoc.isValid()) {
9993 if (HasTypenameKeyword) {
9994 // FIXME: not all declaration name kinds are legal here
9995 D = UnresolvedUsingTypenameDecl::Create(Context, CurContext,
9996 UsingLoc, TypenameLoc,
9997 QualifierLoc,
9998 IdentLoc, NameInfo.getName(),
9999 EllipsisLoc);
10000 } else {
10001 D = UnresolvedUsingValueDecl::Create(Context, CurContext, UsingLoc,
10002 QualifierLoc, NameInfo, EllipsisLoc);
10003 }
10004 D->setAccess(AS);
10005 CurContext->addDecl(D);
10006 return D;
10007 }
10008
10009 auto Build = [&](bool Invalid) {
10010 UsingDecl *UD =
10011 UsingDecl::Create(Context, CurContext, UsingLoc, QualifierLoc,
10012 UsingName, HasTypenameKeyword);
10013 UD->setAccess(AS);
10014 CurContext->addDecl(UD);
10015 UD->setInvalidDecl(Invalid);
10016 return UD;
10017 };
10018 auto BuildInvalid = [&]{ return Build(true); };
10019 auto BuildValid = [&]{ return Build(false); };
10020
10021 if (RequireCompleteDeclContext(SS, LookupContext))
10022 return BuildInvalid();
10023
10024 // Look up the target name.
10025 LookupResult R(*this, NameInfo, LookupOrdinaryName);
10026
10027 // Unlike most lookups, we don't always want to hide tag
10028 // declarations: tag names are visible through the using declaration
10029 // even if hidden by ordinary names, *except* in a dependent context
10030 // where it's important for the sanity of two-phase lookup.
10031 if (!IsInstantiation)
10032 R.setHideTags(false);
10033
10034 // For the purposes of this lookup, we have a base object type
10035 // equal to that of the current context.
10036 if (CurContext->isRecord()) {
10037 R.setBaseObjectType(
10038 Context.getTypeDeclType(cast<CXXRecordDecl>(CurContext)));
10039 }
10040
10041 LookupQualifiedName(R, LookupContext);
10042
10043 // Try to correct typos if possible. If constructor name lookup finds no
10044 // results, that means the named class has no explicit constructors, and we
10045 // suppressed declaring implicit ones (probably because it's dependent or
10046 // invalid).
10047 if (R.empty() &&
10048 NameInfo.getName().getNameKind() != DeclarationName::CXXConstructorName) {
10049 // HACK: Work around a bug in libstdc++'s detection of ::gets. Sometimes
10050 // it will believe that glibc provides a ::gets in cases where it does not,
10051 // and will try to pull it into namespace std with a using-declaration.
10052 // Just ignore the using-declaration in that case.
10053 auto *II = NameInfo.getName().getAsIdentifierInfo();
10054 if (getLangOpts().CPlusPlus14 && II && II->isStr("gets") &&
10055 CurContext->isStdNamespace() &&
10056 isa<TranslationUnitDecl>(LookupContext) &&
10057 getSourceManager().isInSystemHeader(UsingLoc))
10058 return nullptr;
10059 if (TypoCorrection Corrected = CorrectTypo(
10060 R.getLookupNameInfo(), R.getLookupKind(), S, &SS,
10061 llvm::make_unique<UsingValidatorCCC>(
10062 HasTypenameKeyword, IsInstantiation, SS.getScopeRep(),
10063 dyn_cast<CXXRecordDecl>(CurContext)),
10064 CTK_ErrorRecovery)) {
10065 // We reject candidates where DroppedSpecifier == true, hence the
10066 // literal '0' below.
10067 diagnoseTypo(Corrected, PDiag(diag::err_no_member_suggest)
10068 << NameInfo.getName() << LookupContext << 0
10069 << SS.getRange());
10070
10071 // If we picked a correction with no attached Decl we can't do anything
10072 // useful with it, bail out.
10073 NamedDecl *ND = Corrected.getCorrectionDecl();
10074 if (!ND)
10075 return BuildInvalid();
10076
10077 // If we corrected to an inheriting constructor, handle it as one.
10078 auto *RD = dyn_cast<CXXRecordDecl>(ND);
10079 if (RD && RD->isInjectedClassName()) {
10080 // The parent of the injected class name is the class itself.
10081 RD = cast<CXXRecordDecl>(RD->getParent());
10082
10083 // Fix up the information we'll use to build the using declaration.
10084 if (Corrected.WillReplaceSpecifier()) {
10085 NestedNameSpecifierLocBuilder Builder;
10086 Builder.MakeTrivial(Context, Corrected.getCorrectionSpecifier(),
10087 QualifierLoc.getSourceRange());
10088 QualifierLoc = Builder.getWithLocInContext(Context);
10089 }
10090
10091 // In this case, the name we introduce is the name of a derived class
10092 // constructor.
10093 auto *CurClass = cast<CXXRecordDecl>(CurContext);
10094 UsingName.setName(Context.DeclarationNames.getCXXConstructorName(
10095 Context.getCanonicalType(Context.getRecordType(CurClass))));
10096 UsingName.setNamedTypeInfo(nullptr);
10097 for (auto *Ctor : LookupConstructors(RD))
10098 R.addDecl(Ctor);
10099 R.resolveKind();
10100 } else {
10101 // FIXME: Pick up all the declarations if we found an overloaded
10102 // function.
10103 UsingName.setName(ND->getDeclName());
10104 R.addDecl(ND);
10105 }
10106 } else {
10107 Diag(IdentLoc, diag::err_no_member)
10108 << NameInfo.getName() << LookupContext << SS.getRange();
10109 return BuildInvalid();
10110 }
10111 }
10112
10113 if (R.isAmbiguous())
10114 return BuildInvalid();
10115
10116 if (HasTypenameKeyword) {
10117 // If we asked for a typename and got a non-type decl, error out.
10118 if (!R.getAsSingle<TypeDecl>()) {
10119 Diag(IdentLoc, diag::err_using_typename_non_type);
10120 for (LookupResult::iterator I = R.begin(), E = R.end(); I != E; ++I)
10121 Diag((*I)->getUnderlyingDecl()->getLocation(),
10122 diag::note_using_decl_target);
10123 return BuildInvalid();
10124 }
10125 } else {
10126 // If we asked for a non-typename and we got a type, error out,
10127 // but only if this is an instantiation of an unresolved using
10128 // decl. Otherwise just silently find the type name.
10129 if (IsInstantiation && R.getAsSingle<TypeDecl>()) {
10130 Diag(IdentLoc, diag::err_using_dependent_value_is_type);
10131 Diag(R.getFoundDecl()->getLocation(), diag::note_using_decl_target);
10132 return BuildInvalid();
10133 }
10134 }
10135
10136 // C++14 [namespace.udecl]p6:
10137 // A using-declaration shall not name a namespace.
10138 if (R.getAsSingle<NamespaceDecl>()) {
10139 Diag(IdentLoc, diag::err_using_decl_can_not_refer_to_namespace)
10140 << SS.getRange();
10141 return BuildInvalid();
10142 }
10143
10144 // C++14 [namespace.udecl]p7:
10145 // A using-declaration shall not name a scoped enumerator.
10146 if (auto *ED = R.getAsSingle<EnumConstantDecl>()) {
10147 if (cast<EnumDecl>(ED->getDeclContext())->isScoped()) {
10148 Diag(IdentLoc, diag::err_using_decl_can_not_refer_to_scoped_enum)
10149 << SS.getRange();
10150 return BuildInvalid();
10151 }
10152 }
10153
10154 UsingDecl *UD = BuildValid();
10155
10156 // Some additional rules apply to inheriting constructors.
10157 if (UsingName.getName().getNameKind() ==
10158 DeclarationName::CXXConstructorName) {
10159 // Suppress access diagnostics; the access check is instead performed at the
10160 // point of use for an inheriting constructor.
10161 R.suppressDiagnostics();
10162 if (CheckInheritingConstructorUsingDecl(UD))
10163 return UD;
10164 }
10165
10166 for (LookupResult::iterator I = R.begin(), E = R.end(); I != E; ++I) {
10167 UsingShadowDecl *PrevDecl = nullptr;
10168 if (!CheckUsingShadowDecl(UD, *I, Previous, PrevDecl))
10169 BuildUsingShadowDecl(S, UD, *I, PrevDecl);
10170 }
10171
10172 return UD;
10173 }
10174
10175 NamedDecl *Sema::BuildUsingPackDecl(NamedDecl *InstantiatedFrom,
10176 ArrayRef<NamedDecl *> Expansions) {
10177 assert(isa<UnresolvedUsingValueDecl>(InstantiatedFrom) ||
10178 isa<UnresolvedUsingTypenameDecl>(InstantiatedFrom) ||
10179 isa<UsingPackDecl>(InstantiatedFrom));
10180
10181 auto *UPD =
10182 UsingPackDecl::Create(Context, CurContext, InstantiatedFrom, Expansions);
10183 UPD->setAccess(InstantiatedFrom->getAccess());
10184 CurContext->addDecl(UPD);
10185 return UPD;
10186 }
10187
10188 /// Additional checks for a using declaration referring to a constructor name.
10189 bool Sema::CheckInheritingConstructorUsingDecl(UsingDecl *UD) {
10190 assert(!UD->hasTypename() && "expecting a constructor name");
10191
10192 const Type *SourceType = UD->getQualifier()->getAsType();
10193 assert(SourceType &&
10194 "Using decl naming constructor doesn't have type in scope spec.");
10195 CXXRecordDecl *TargetClass = cast<CXXRecordDecl>(CurContext);
10196
10197 // Check whether the named type is a direct base class.
10198 bool AnyDependentBases = false;
10199 auto *Base = findDirectBaseWithType(TargetClass, QualType(SourceType, 0),
10200 AnyDependentBases);
10201 if (!Base && !AnyDependentBases) {
10202 Diag(UD->getUsingLoc(),
10203 diag::err_using_decl_constructor_not_in_direct_base)
10204 << UD->getNameInfo().getSourceRange()
10205 << QualType(SourceType, 0) << TargetClass;
10206 UD->setInvalidDecl();
10207 return true;
10208 }
10209
10210 if (Base)
10211 Base->setInheritConstructors();
10212
10213 return false;
10214 }
10215
10216 /// Checks that the given using declaration is not an invalid
10217 /// redeclaration. Note that this is checking only for the using decl
10218 /// itself, not for any ill-formedness among the UsingShadowDecls.
10219 bool Sema::CheckUsingDeclRedeclaration(SourceLocation UsingLoc,
10220 bool HasTypenameKeyword,
10221 const CXXScopeSpec &SS,
10222 SourceLocation NameLoc,
10223 const LookupResult &Prev) {
10224 NestedNameSpecifier *Qual = SS.getScopeRep();
10225
10226 // C++03 [namespace.udecl]p8:
10227 // C++0x [namespace.udecl]p10:
10228 // A using-declaration is a declaration and can therefore be used
10229 // repeatedly where (and only where) multiple declarations are
10230 // allowed.
10231 //
10232 // That's in non-member contexts.
10233 if (!CurContext->getRedeclContext()->isRecord()) {
10234 // A dependent qualifier outside a class can only ever resolve to an
10235 // enumeration type. Therefore it conflicts with any other non-type
10236 // declaration in the same scope.
10237 // FIXME: How should we check for dependent type-type conflicts at block
10238 // scope?
10239 if (Qual->isDependent() && !HasTypenameKeyword) {
10240 for (auto *D : Prev) {
10241 if (!isa<TypeDecl>(D) && !isa<UsingDecl>(D) && !isa<UsingPackDecl>(D)) {
10242 bool OldCouldBeEnumerator =
10243 isa<UnresolvedUsingValueDecl>(D) || isa<EnumConstantDecl>(D);
10244 Diag(NameLoc,
10245 OldCouldBeEnumerator ? diag::err_redefinition
10246 : diag::err_redefinition_different_kind)
10247 << Prev.getLookupName();
10248 Diag(D->getLocation(), diag::note_previous_definition);
10249 return true;
10250 }
10251 }
10252 }
10253 return false;
10254 }
10255
10256 for (LookupResult::iterator I = Prev.begin(), E = Prev.end(); I != E; ++I) {
10257 NamedDecl *D = *I;
10258
10259 bool DTypename;
10260 NestedNameSpecifier *DQual;
10261 if (UsingDecl *UD = dyn_cast<UsingDecl>(D)) {
10262 DTypename = UD->hasTypename();
10263 DQual = UD->getQualifier();
10264 } else if (UnresolvedUsingValueDecl *UD
10265 = dyn_cast<UnresolvedUsingValueDecl>(D)) {
10266 DTypename = false;
10267 DQual = UD->getQualifier();
10268 } else if (UnresolvedUsingTypenameDecl *UD
10269 = dyn_cast<UnresolvedUsingTypenameDecl>(D)) {
10270 DTypename = true;
10271 DQual = UD->getQualifier();
10272 } else continue;
10273
10274 // using decls differ if one says 'typename' and the other doesn't.
10275 // FIXME: non-dependent using decls?
10276 if (HasTypenameKeyword != DTypename) continue;
10277
10278 // using decls differ if they name different scopes (but note that
10279 // template instantiation can cause this check to trigger when it
10280 // didn't before instantiation).
10281 if (Context.getCanonicalNestedNameSpecifier(Qual) !=
10282 Context.getCanonicalNestedNameSpecifier(DQual))
10283 continue;
10284
10285 Diag(NameLoc, diag::err_using_decl_redeclaration) << SS.getRange();
10286 Diag(D->getLocation(), diag::note_using_decl) << 1;
10287 return true;
10288 }
10289
10290 return false;
10291 }
10292
10293
10294 /// Checks that the given nested-name qualifier used in a using decl
10295 /// in the current context is appropriately related to the current
10296 /// scope. If an error is found, diagnoses it and returns true.
10297 bool Sema::CheckUsingDeclQualifier(SourceLocation UsingLoc,
10298 bool HasTypename,
10299 const CXXScopeSpec &SS,
10300 const DeclarationNameInfo &NameInfo,
10301 SourceLocation NameLoc) {
10302 DeclContext *NamedContext = computeDeclContext(SS);
10303
10304 if (!CurContext->isRecord()) {
10305 // C++03 [namespace.udecl]p3:
10306 // C++0x [namespace.udecl]p8:
10307 // A using-declaration for a class member shall be a member-declaration.
10308
10309 // If we weren't able to compute a valid scope, it might validly be a
10310 // dependent class scope or a dependent enumeration unscoped scope. If
10311 // we have a 'typename' keyword, the scope must resolve to a class type.
10312 if ((HasTypename && !NamedContext) ||
10313 (NamedContext && NamedContext->getRedeclContext()->isRecord())) {
10314 auto *RD = NamedContext
10315 ? cast<CXXRecordDecl>(NamedContext->getRedeclContext())
10316 : nullptr;
10317 if (RD && RequireCompleteDeclContext(const_cast<CXXScopeSpec&>(SS), RD))
10318 RD = nullptr;
10319
10320 Diag(NameLoc, diag::err_using_decl_can_not_refer_to_class_member)
10321 << SS.getRange();
10322
10323 // If we have a complete, non-dependent source type, try to suggest a
10324 // way to get the same effect.
10325 if (!RD)
10326 return true;
10327
10328 // Find what this using-declaration was referring to.
10329 LookupResult R(*this, NameInfo, LookupOrdinaryName);
10330 R.setHideTags(false);
10331 R.suppressDiagnostics();
10332 LookupQualifiedName(R, RD);
10333
10334 if (R.getAsSingle<TypeDecl>()) {
10335 if (getLangOpts().CPlusPlus11) {
10336 // Convert 'using X::Y;' to 'using Y = X::Y;'.
10337 Diag(SS.getBeginLoc(), diag::note_using_decl_class_member_workaround)
10338 << 0 // alias declaration
10339 << FixItHint::CreateInsertion(SS.getBeginLoc(),
10340 NameInfo.getName().getAsString() +
10341 " = ");
10342 } else {
10343 // Convert 'using X::Y;' to 'typedef X::Y Y;'.
10344 SourceLocation InsertLoc = getLocForEndOfToken(NameInfo.getEndLoc());
10345 Diag(InsertLoc, diag::note_using_decl_class_member_workaround)
10346 << 1 // typedef declaration
10347 << FixItHint::CreateReplacement(UsingLoc, "typedef")
10348 << FixItHint::CreateInsertion(
10349 InsertLoc, " " + NameInfo.getName().getAsString());
10350 }
10351 } else if (R.getAsSingle<VarDecl>()) {
10352 // Don't provide a fixit outside C++11 mode; we don't want to suggest
10353 // repeating the type of the static data member here.
10354 FixItHint FixIt;
10355 if (getLangOpts().CPlusPlus11) {
10356 // Convert 'using X::Y;' to 'auto &Y = X::Y;'.
10357 FixIt = FixItHint::CreateReplacement(
10358 UsingLoc, "auto &" + NameInfo.getName().getAsString() + " = ");
10359 }
10360
10361 Diag(UsingLoc, diag::note_using_decl_class_member_workaround)
10362 << 2 // reference declaration
10363 << FixIt;
10364 } else if (R.getAsSingle<EnumConstantDecl>()) {
10365 // Don't provide a fixit outside C++11 mode; we don't want to suggest
10366 // repeating the type of the enumeration here, and we can't do so if
10367 // the type is anonymous.
10368 FixItHint FixIt;
10369 if (getLangOpts().CPlusPlus11) {
10370 // Convert 'using X::Y;' to 'auto &Y = X::Y;'.
10371 FixIt = FixItHint::CreateReplacement(
10372 UsingLoc,
10373 "constexpr auto " + NameInfo.getName().getAsString() + " = ");
10374 }
10375
10376 Diag(UsingLoc, diag::note_using_decl_class_member_workaround)
10377 << (getLangOpts().CPlusPlus11 ? 4 : 3) // const[expr] variable
10378 << FixIt;
10379 }
10380 return true;
10381 }
10382
10383 // Otherwise, this might be valid.
10384 return false;
10385 }
10386
10387 // The current scope is a record.
10388
10389 // If the named context is dependent, we can't decide much.
10390 if (!NamedContext) {
10391 // FIXME: in C++0x, we can diagnose if we can prove that the
10392 // nested-name-specifier does not refer to a base class, which is
10393 // still possible in some cases.
10394
10395 // Otherwise we have to conservatively report that things might be
10396 // okay.
10397 return false;
10398 }
10399
10400 if (!NamedContext->isRecord()) {
10401 // Ideally this would point at the last name in the specifier,
10402 // but we don't have that level of source info.
10403 Diag(SS.getRange().getBegin(),
10404 diag::err_using_decl_nested_name_specifier_is_not_class)
10405 << SS.getScopeRep() << SS.getRange();
10406 return true;
10407 }
10408
10409 if (!NamedContext->isDependentContext() &&
10410 RequireCompleteDeclContext(const_cast<CXXScopeSpec&>(SS), NamedContext))
10411 return true;
10412
10413 if (getLangOpts().CPlusPlus11) {
10414 // C++11 [namespace.udecl]p3:
10415 // In a using-declaration used as a member-declaration, the
10416 // nested-name-specifier shall name a base class of the class
10417 // being defined.
10418
10419 if (cast<CXXRecordDecl>(CurContext)->isProvablyNotDerivedFrom(
10420 cast<CXXRecordDecl>(NamedContext))) {
10421 if (CurContext == NamedContext) {
10422 Diag(NameLoc,
10423 diag::err_using_decl_nested_name_specifier_is_current_class)
10424 << SS.getRange();
10425 return true;
10426 }
10427
10428 if (!cast<CXXRecordDecl>(NamedContext)->isInvalidDecl()) {
10429 Diag(SS.getRange().getBegin(),
10430 diag::err_using_decl_nested_name_specifier_is_not_base_class)
10431 << SS.getScopeRep()
10432 << cast<CXXRecordDecl>(CurContext)
10433 << SS.getRange();
10434 }
10435 return true;
10436 }
10437
10438 return false;
10439 }
10440
10441 // C++03 [namespace.udecl]p4:
10442 // A using-declaration used as a member-declaration shall refer
10443 // to a member of a base class of the class being defined [etc.].
10444
10445 // Salient point: SS doesn't have to name a base class as long as
10446 // lookup only finds members from base classes. Therefore we can
10447 // diagnose here only if we can prove that that can't happen,
10448 // i.e. if the class hierarchies provably don't intersect.
10449
10450 // TODO: it would be nice if "definitely valid" results were cached
10451 // in the UsingDecl and UsingShadowDecl so that these checks didn't
10452 // need to be repeated.
10453
10454 llvm::SmallPtrSet<const CXXRecordDecl *, 4> Bases;
10455 auto Collect = [&Bases](const CXXRecordDecl *Base) {
10456 Bases.insert(Base);
10457 return true;
10458 };
10459
10460 // Collect all bases. Return false if we find a dependent base.
10461 if (!cast<CXXRecordDecl>(CurContext)->forallBases(Collect))
10462 return false;
10463
10464 // Returns true if the base is dependent or is one of the accumulated base
10465 // classes.
10466 auto IsNotBase = [&Bases](const CXXRecordDecl *Base) {
10467 return !Bases.count(Base);
10468 };
10469
10470 // Return false if the class has a dependent base or if it or one
10471 // of its bases is present in the base set of the current context.
10472 if (Bases.count(cast<CXXRecordDecl>(NamedContext)) ||
10473 !cast<CXXRecordDecl>(NamedContext)->forallBases(IsNotBase))
10474 return false;
10475
10476 Diag(SS.getRange().getBegin(),
10477 diag::err_using_decl_nested_name_specifier_is_not_base_class)
10478 << SS.getScopeRep()
10479 << cast<CXXRecordDecl>(CurContext)
10480 << SS.getRange();
10481
10482 return true;
10483 }
10484
10485 Decl *Sema::ActOnAliasDeclaration(Scope *S, AccessSpecifier AS,
10486 MultiTemplateParamsArg TemplateParamLists,
10487 SourceLocation UsingLoc, UnqualifiedId &Name,
10488 const ParsedAttributesView &AttrList,
10489 TypeResult Type, Decl *DeclFromDeclSpec) {
10490 // Skip up to the relevant declaration scope.
10491 while (S->isTemplateParamScope())
10492 S = S->getParent();
10493 assert((S->getFlags() & Scope::DeclScope) &&
10494 "got alias-declaration outside of declaration scope");
10495
10496 if (Type.isInvalid())
10497 return nullptr;
10498
10499 bool Invalid = false;
10500 DeclarationNameInfo NameInfo = GetNameFromUnqualifiedId(Name);
10501 TypeSourceInfo *TInfo = nullptr;
10502 GetTypeFromParser(Type.get(), &TInfo);
10503
10504 if (DiagnoseClassNameShadow(CurContext, NameInfo))
10505 return nullptr;
10506
10507 if (DiagnoseUnexpandedParameterPack(Name.StartLocation, TInfo,
10508 UPPC_DeclarationType)) {
10509 Invalid = true;
10510 TInfo = Context.getTrivialTypeSourceInfo(Context.IntTy,
10511 TInfo->getTypeLoc().getBeginLoc());
10512 }
10513
10514 LookupResult Previous(*this, NameInfo, LookupOrdinaryName,
10515 TemplateParamLists.size()
10516 ? forRedeclarationInCurContext()
10517 : ForVisibleRedeclaration);
10518 LookupName(Previous, S);
10519
10520 // Warn about shadowing the name of a template parameter.
10521 if (Previous.isSingleResult() &&
10522 Previous.getFoundDecl()->isTemplateParameter()) {
10523 DiagnoseTemplateParameterShadow(Name.StartLocation,Previous.getFoundDecl());
10524 Previous.clear();
10525 }
10526
10527 assert(Name.Kind == UnqualifiedIdKind::IK_Identifier &&
10528 "name in alias declaration must be an identifier");
10529 TypeAliasDecl *NewTD = TypeAliasDecl::Create(Context, CurContext, UsingLoc,
10530 Name.StartLocation,
10531 Name.Identifier, TInfo);
10532
10533 NewTD->setAccess(AS);
10534
10535 if (Invalid)
10536 NewTD->setInvalidDecl();
10537
10538 ProcessDeclAttributeList(S, NewTD, AttrList);
10539 AddPragmaAttributes(S, NewTD);
10540
10541 CheckTypedefForVariablyModifiedType(S, NewTD);
10542 Invalid |= NewTD->isInvalidDecl();
10543
10544 bool Redeclaration = false;
10545
10546 NamedDecl *NewND;
10547 if (TemplateParamLists.size()) {
10548 TypeAliasTemplateDecl *OldDecl = nullptr;
10549 TemplateParameterList *OldTemplateParams = nullptr;
10550
10551 if (TemplateParamLists.size() != 1) {
10552 Diag(UsingLoc, diag::err_alias_template_extra_headers)
10553 << SourceRange(TemplateParamLists[1]->getTemplateLoc(),
10554 TemplateParamLists[TemplateParamLists.size()-1]->getRAngleLoc());
10555 }
10556 TemplateParameterList *TemplateParams = TemplateParamLists[0];
10557
10558 // Check that we can declare a template here.
10559 if (CheckTemplateDeclScope(S, TemplateParams))
10560 return nullptr;
10561
10562 // Only consider previous declarations in the same scope.
10563 FilterLookupForScope(Previous, CurContext, S, /*ConsiderLinkage*/false,
10564 /*ExplicitInstantiationOrSpecialization*/false);
10565 if (!Previous.empty()) {
10566 Redeclaration = true;
10567
10568 OldDecl = Previous.getAsSingle<TypeAliasTemplateDecl>();
10569 if (!OldDecl && !Invalid) {
10570 Diag(UsingLoc, diag::err_redefinition_different_kind)
10571 << Name.Identifier;
10572
10573 NamedDecl *OldD = Previous.getRepresentativeDecl();
10574 if (OldD->getLocation().isValid())
10575 Diag(OldD->getLocation(), diag::note_previous_definition);
10576
10577 Invalid = true;
10578 }
10579
10580 if (!Invalid && OldDecl && !OldDecl->isInvalidDecl()) {
10581 if (TemplateParameterListsAreEqual(TemplateParams,
10582 OldDecl->getTemplateParameters(),
10583 /*Complain=*/true,
10584 TPL_TemplateMatch))
10585 OldTemplateParams =
10586 OldDecl->getMostRecentDecl()->getTemplateParameters();
10587 else
10588 Invalid = true;
10589
10590 TypeAliasDecl *OldTD = OldDecl->getTemplatedDecl();
10591 if (!Invalid &&
10592 !Context.hasSameType(OldTD->getUnderlyingType(),
10593 NewTD->getUnderlyingType())) {
10594 // FIXME: The C++0x standard does not clearly say this is ill-formed,
10595 // but we can't reasonably accept it.
10596 Diag(NewTD->getLocation(), diag::err_redefinition_different_typedef)
10597 << 2 << NewTD->getUnderlyingType() << OldTD->getUnderlyingType();
10598 if (OldTD->getLocation().isValid())
10599 Diag(OldTD->getLocation(), diag::note_previous_definition);
10600 Invalid = true;
10601 }
10602 }
10603 }
10604
10605 // Merge any previous default template arguments into our parameters,
10606 // and check the parameter list.
10607 if (CheckTemplateParameterList(TemplateParams, OldTemplateParams,
10608 TPC_TypeAliasTemplate))
10609 return nullptr;
10610
10611 TypeAliasTemplateDecl *NewDecl =
10612 TypeAliasTemplateDecl::Create(Context, CurContext, UsingLoc,
10613 Name.Identifier, TemplateParams,
10614 NewTD);
10615 NewTD->setDescribedAliasTemplate(NewDecl);
10616
10617 NewDecl->setAccess(AS);
10618
10619 if (Invalid)
10620 NewDecl->setInvalidDecl();
10621 else if (OldDecl) {
10622 NewDecl->setPreviousDecl(OldDecl);
10623 CheckRedeclarationModuleOwnership(NewDecl, OldDecl);
10624 }
10625
10626 NewND = NewDecl;
10627 } else {
10628 if (auto *TD = dyn_cast_or_null<TagDecl>(DeclFromDeclSpec)) {
10629 setTagNameForLinkagePurposes(TD, NewTD);
10630 handleTagNumbering(TD, S);
10631 }
10632 ActOnTypedefNameDecl(S, CurContext, NewTD, Previous, Redeclaration);
10633 NewND = NewTD;
10634 }
10635
10636 PushOnScopeChains(NewND, S);
10637 ActOnDocumentableDecl(NewND);
10638 return NewND;
10639 }
10640
10641 Decl *Sema::ActOnNamespaceAliasDef(Scope *S, SourceLocation NamespaceLoc,
10642 SourceLocation AliasLoc,
10643 IdentifierInfo *Alias, CXXScopeSpec &SS,
10644 SourceLocation IdentLoc,
10645 IdentifierInfo *Ident) {
10646
10647 // Lookup the namespace name.
10648 LookupResult R(*this, Ident, IdentLoc, LookupNamespaceName);
10649 LookupParsedName(R, S, &SS);
10650
10651 if (R.isAmbiguous())
10652 return nullptr;
10653
10654 if (R.empty()) {
10655 if (!TryNamespaceTypoCorrection(*this, R, S, SS, IdentLoc, Ident)) {
10656 Diag(IdentLoc, diag::err_expected_namespace_name) << SS.getRange();
10657 return nullptr;
10658 }
10659 }
10660 assert(!R.isAmbiguous() && !R.empty());
10661 NamedDecl *ND = R.getRepresentativeDecl();
10662
10663 // Check if we have a previous declaration with the same name.
10664 LookupResult PrevR(*this, Alias, AliasLoc, LookupOrdinaryName,
10665 ForVisibleRedeclaration);
10666 LookupName(PrevR, S);
10667
10668 // Check we're not shadowing a template parameter.
10669 if (PrevR.isSingleResult() && PrevR.getFoundDecl()->isTemplateParameter()) {
10670 DiagnoseTemplateParameterShadow(AliasLoc, PrevR.getFoundDecl());
10671 PrevR.clear();
10672 }
10673
10674 // Filter out any other lookup result from an enclosing scope.
10675 FilterLookupForScope(PrevR, CurContext, S, /*ConsiderLinkage*/false,
10676 /*AllowInlineNamespace*/false);
10677
10678 // Find the previous declaration and check that we can redeclare it.
10679 NamespaceAliasDecl *Prev = nullptr;
10680 if (PrevR.isSingleResult()) {
10681 NamedDecl *PrevDecl = PrevR.getRepresentativeDecl();
10682 if (NamespaceAliasDecl *AD = dyn_cast<NamespaceAliasDecl>(PrevDecl)) {
10683 // We already have an alias with the same name that points to the same
10684 // namespace; check that it matches.
10685 if (AD->getNamespace()->Equals(getNamespaceDecl(ND))) {
10686 Prev = AD;
10687 } else if (isVisible(PrevDecl)) {
10688 Diag(AliasLoc, diag::err_redefinition_different_namespace_alias)
10689 << Alias;
10690 Diag(AD->getLocation(), diag::note_previous_namespace_alias)
10691 << AD->getNamespace();
10692 return nullptr;
10693 }
10694 } else if (isVisible(PrevDecl)) {
10695 unsigned DiagID = isa<NamespaceDecl>(PrevDecl->getUnderlyingDecl())
10696 ? diag::err_redefinition
10697 : diag::err_redefinition_different_kind;
10698 Diag(AliasLoc, DiagID) << Alias;
10699 Diag(PrevDecl->getLocation(), diag::note_previous_definition);
10700 return nullptr;
10701 }
10702 }
10703
10704 // The use of a nested name specifier may trigger deprecation warnings.
10705 DiagnoseUseOfDecl(ND, IdentLoc);
10706
10707 NamespaceAliasDecl *AliasDecl =
10708 NamespaceAliasDecl::Create(Context, CurContext, NamespaceLoc, AliasLoc,
10709 Alias, SS.getWithLocInContext(Context),
10710 IdentLoc, ND);
10711 if (Prev)
10712 AliasDecl->setPreviousDecl(Prev);
10713
10714 PushOnScopeChains(AliasDecl, S);
10715 return AliasDecl;
10716 }
10717
10718 namespace {
10719 struct SpecialMemberExceptionSpecInfo
10720 : SpecialMemberVisitor<SpecialMemberExceptionSpecInfo> {
10721 SourceLocation Loc;
10722 Sema::ImplicitExceptionSpecification ExceptSpec;
10723
10724 SpecialMemberExceptionSpecInfo(Sema &S, CXXMethodDecl *MD,
10725 Sema::CXXSpecialMember CSM,
10726 Sema::InheritedConstructorInfo *ICI,
10727 SourceLocation Loc)
10728 : SpecialMemberVisitor(S, MD, CSM, ICI), Loc(Loc), ExceptSpec(S) {}
10729
10730 bool visitBase(CXXBaseSpecifier *Base);
10731 bool visitField(FieldDecl *FD);
10732
10733 void visitClassSubobject(CXXRecordDecl *Class, Subobject Subobj,
10734 unsigned Quals);
10735
10736 void visitSubobjectCall(Subobject Subobj,
10737 Sema::SpecialMemberOverloadResult SMOR);
10738 };
10739 }
10740
10741 bool SpecialMemberExceptionSpecInfo::visitBase(CXXBaseSpecifier *Base) {
10742 auto *RT = Base->getType()->getAs<RecordType>();
10743 if (!RT)
10744 return false;
10745
10746 auto *BaseClass = cast<CXXRecordDecl>(RT->getDecl());
10747 Sema::SpecialMemberOverloadResult SMOR = lookupInheritedCtor(BaseClass);
10748 if (auto *BaseCtor = SMOR.getMethod()) {
10749 visitSubobjectCall(Base, BaseCtor);
10750 return false;
10751 }
10752
10753 visitClassSubobject(BaseClass, Base, 0);
10754 return false;
10755 }
10756
10757 bool SpecialMemberExceptionSpecInfo::visitField(FieldDecl *FD) {
10758 if (CSM == Sema::CXXDefaultConstructor && FD->hasInClassInitializer()) {
10759 Expr *E = FD->getInClassInitializer();
10760 if (!E)
10761 // FIXME: It's a little wasteful to build and throw away a
10762 // CXXDefaultInitExpr here.
10763 // FIXME: We should have a single context note pointing at Loc, and
10764 // this location should be MD->getLocation() instead, since that's
10765 // the location where we actually use the default init expression.
10766 E = S.BuildCXXDefaultInitExpr(Loc, FD).get();
10767 if (E)
10768 ExceptSpec.CalledExpr(E);
10769 } else if (auto *RT = S.Context.getBaseElementType(FD->getType())
10770 ->getAs<RecordType>()) {
10771 visitClassSubobject(cast<CXXRecordDecl>(RT->getDecl()), FD,
10772 FD->getType().getCVRQualifiers());
10773 }
10774 return false;
10775 }
10776
10777 void SpecialMemberExceptionSpecInfo::visitClassSubobject(CXXRecordDecl *Class,
10778 Subobject Subobj,
10779 unsigned Quals) {
10780 FieldDecl *Field = Subobj.dyn_cast<FieldDecl*>();
10781 bool IsMutable = Field && Field->isMutable();
10782 visitSubobjectCall(Subobj, lookupIn(Class, Quals, IsMutable));
10783 }
10784
10785 void SpecialMemberExceptionSpecInfo::visitSubobjectCall(
10786 Subobject Subobj, Sema::SpecialMemberOverloadResult SMOR) {
10787 // Note, if lookup fails, it doesn't matter what exception specification we
10788 // choose because the special member will be deleted.
10789 if (CXXMethodDecl *MD = SMOR.getMethod())
10790 ExceptSpec.CalledDecl(getSubobjectLoc(Subobj), MD);
10791 }
10792
10793 namespace {
10794 /// RAII object to register a special member as being currently declared.
10795 struct ComputingExceptionSpec {
10796 Sema &S;
10797
10798 ComputingExceptionSpec(Sema &S, CXXMethodDecl *MD, SourceLocation Loc)
10799 : S(S) {
10800 Sema::CodeSynthesisContext Ctx;
10801 Ctx.Kind = Sema::CodeSynthesisContext::ExceptionSpecEvaluation;
10802 Ctx.PointOfInstantiation = Loc;
10803 Ctx.Entity = MD;
10804 S.pushCodeSynthesisContext(Ctx);
10805 }
10806 ~ComputingExceptionSpec() {
10807 S.popCodeSynthesisContext();
10808 }
10809 };
10810 }
10811
10812 static Sema::ImplicitExceptionSpecification
10813 ComputeDefaultedSpecialMemberExceptionSpec(
10814 Sema &S, SourceLocation Loc, CXXMethodDecl *MD, Sema::CXXSpecialMember CSM,
10815 Sema::InheritedConstructorInfo *ICI) {
10816 ComputingExceptionSpec CES(S, MD, Loc);
10817
10818 CXXRecordDecl *ClassDecl = MD->getParent();
10819
10820 // C++ [except.spec]p14:
10821 // An implicitly declared special member function (Clause 12) shall have an
10822 // exception-specification. [...]
10823 SpecialMemberExceptionSpecInfo Info(S, MD, CSM, ICI, MD->getLocation());
10824 if (ClassDecl->isInvalidDecl())
10825 return Info.ExceptSpec;
10826
10827 // FIXME: If this diagnostic fires, we're probably missing a check for
10828 // attempting to resolve an exception specification before it's known
10829 // at a higher level.
10830 if (S.RequireCompleteType(MD->getLocation(),
10831 S.Context.getRecordType(ClassDecl),
10832 diag::err_exception_spec_incomplete_type))
10833 return Info.ExceptSpec;
10834
10835 // C++1z [except.spec]p7:
10836 // [Look for exceptions thrown by] a constructor selected [...] to
10837 // initialize a potentially constructed subobject,
10838 // C++1z [except.spec]p8:
10839 // The exception specification for an implicitly-declared destructor, or a
10840 // destructor without a noexcept-specifier, is potentially-throwing if and
10841 // only if any of the destructors for any of its potentially constructed
10842 // subojects is potentially throwing.
10843 // FIXME: We respect the first rule but ignore the "potentially constructed"
10844 // in the second rule to resolve a core issue (no number yet) that would have
10845 // us reject:
10846 // struct A { virtual void f() = 0; virtual ~A() noexcept(false) = 0; };
10847 // struct B : A {};
10848 // struct C : B { void f(); };
10849 // ... due to giving B::~B() a non-throwing exception specification.
10850 Info.visit(Info.IsConstructor ? Info.VisitPotentiallyConstructedBases
10851 : Info.VisitAllBases);
10852
10853 return Info.ExceptSpec;
10854 }
10855
10856 namespace {
10857 /// RAII object to register a special member as being currently declared.
10858 struct DeclaringSpecialMember {
10859 Sema &S;
10860 Sema::SpecialMemberDecl D;
10861 Sema::ContextRAII SavedContext;
10862 bool WasAlreadyBeingDeclared;
10863
10864 DeclaringSpecialMember(Sema &S, CXXRecordDecl *RD, Sema::CXXSpecialMember CSM)
10865 : S(S), D(RD, CSM), SavedContext(S, RD) {
10866 WasAlreadyBeingDeclared = !S.SpecialMembersBeingDeclared.insert(D).second;
10867 if (WasAlreadyBeingDeclared)
10868 // This almost never happens, but if it does, ensure that our cache
10869 // doesn't contain a stale result.
10870 S.SpecialMemberCache.clear();
10871 else {
10872 // Register a note to be produced if we encounter an error while
10873 // declaring the special member.
10874 Sema::CodeSynthesisContext Ctx;
10875 Ctx.Kind = Sema::CodeSynthesisContext::DeclaringSpecialMember;
10876 // FIXME: We don't have a location to use here. Using the class's
10877 // location maintains the fiction that we declare all special members
10878 // with the class, but (1) it's not clear that lying about that helps our
10879 // users understand what's going on, and (2) there may be outer contexts
10880 // on the stack (some of which are relevant) and printing them exposes
10881 // our lies.
10882 Ctx.PointOfInstantiation = RD->getLocation();
10883 Ctx.Entity = RD;
10884 Ctx.SpecialMember = CSM;
10885 S.pushCodeSynthesisContext(Ctx);
10886 }
10887 }
10888 ~DeclaringSpecialMember() {
10889 if (!WasAlreadyBeingDeclared) {
10890 S.SpecialMembersBeingDeclared.erase(D);
10891 S.popCodeSynthesisContext();
10892 }
10893 }
10894
10895 /// Are we already trying to declare this special member?
10896 bool isAlreadyBeingDeclared() const {
10897 return WasAlreadyBeingDeclared;
10898 }
10899 };
10900 }
10901
10902 void Sema::CheckImplicitSpecialMemberDeclaration(Scope *S, FunctionDecl *FD) {
10903 // Look up any existing declarations, but don't trigger declaration of all
10904 // implicit special members with this name.
10905 DeclarationName Name = FD->getDeclName();
10906 LookupResult R(*this, Name, SourceLocation(), LookupOrdinaryName,
10907 ForExternalRedeclaration);
10908 for (auto *D : FD->getParent()->lookup(Name))
10909 if (auto *Acceptable = R.getAcceptableDecl(D))
10910 R.addDecl(Acceptable);
10911 R.resolveKind();
10912 R.suppressDiagnostics();
10913
10914 CheckFunctionDeclaration(S, FD, R, /*IsMemberSpecialization*/false);
10915 }
10916
10917 void Sema::setupImplicitSpecialMemberType(CXXMethodDecl *SpecialMem,
10918 QualType ResultTy,
10919 ArrayRef<QualType> Args) {
10920 // Build an exception specification pointing back at this constructor.
10921 FunctionProtoType::ExtProtoInfo EPI = getImplicitMethodEPI(*this, SpecialMem);
10922
10923 if (getLangOpts().OpenCLCPlusPlus) {
10924 // OpenCL: Implicitly defaulted special member are of the generic address
10925 // space.
10926 EPI.TypeQuals.addAddressSpace(LangAS::opencl_generic);
10927 }
10928
10929 auto QT = Context.getFunctionType(ResultTy, Args, EPI);
10930 SpecialMem->setType(QT);
10931 }
10932
10933 CXXConstructorDecl *Sema::DeclareImplicitDefaultConstructor(
10934 CXXRecordDecl *ClassDecl) {
10935 // C++ [class.ctor]p5:
10936 // A default constructor for a class X is a constructor of class X
10937 // that can be called without an argument. If there is no
10938 // user-declared constructor for class X, a default constructor is
10939 // implicitly declared. An implicitly-declared default constructor
10940 // is an inline public member of its class.
10941 assert(ClassDecl->needsImplicitDefaultConstructor() &&
10942 "Should not build implicit default constructor!");
10943
10944 DeclaringSpecialMember DSM(*this, ClassDecl, CXXDefaultConstructor);
10945 if (DSM.isAlreadyBeingDeclared())
10946 return nullptr;
10947
10948 bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl,
10949 CXXDefaultConstructor,
10950 false);
10951
10952 // Create the actual constructor declaration.
10953 CanQualType ClassType
10954 = Context.getCanonicalType(Context.getTypeDeclType(ClassDecl));
10955 SourceLocation ClassLoc = ClassDecl->getLocation();
10956 DeclarationName Name
10957 = Context.DeclarationNames.getCXXConstructorName(ClassType);
10958 DeclarationNameInfo NameInfo(Name, ClassLoc);
10959 CXXConstructorDecl *DefaultCon = CXXConstructorDecl::Create(
10960 Context, ClassDecl, ClassLoc, NameInfo, /*Type*/QualType(),
10961 /*TInfo=*/nullptr, /*isExplicit=*/false, /*isInline=*/true,
10962 /*isImplicitlyDeclared=*/true, Constexpr);
10963 DefaultCon->setAccess(AS_public);
10964 DefaultCon->setDefaulted();
10965
10966 if (getLangOpts().CUDA) {
10967 inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXDefaultConstructor,
10968 DefaultCon,
10969 /* ConstRHS */ false,
10970 /* Diagnose */ false);
10971 }
10972
10973 setupImplicitSpecialMemberType(DefaultCon, Context.VoidTy, None);
10974
10975 // We don't need to use SpecialMemberIsTrivial here; triviality for default
10976 // constructors is easy to compute.
10977 DefaultCon->setTrivial(ClassDecl->hasTrivialDefaultConstructor());
10978
10979 // Note that we have declared this constructor.
10980 ++ASTContext::NumImplicitDefaultConstructorsDeclared;
10981
10982 Scope *S = getScopeForContext(ClassDecl);
10983 CheckImplicitSpecialMemberDeclaration(S, DefaultCon);
10984
10985 if (ShouldDeleteSpecialMember(DefaultCon, CXXDefaultConstructor))
10986 SetDeclDeleted(DefaultCon, ClassLoc);
10987
10988 if (S)
10989 PushOnScopeChains(DefaultCon, S, false);
10990 ClassDecl->addDecl(DefaultCon);
10991
10992 return DefaultCon;
10993 }
10994
10995 void Sema::DefineImplicitDefaultConstructor(SourceLocation CurrentLocation,
10996 CXXConstructorDecl *Constructor) {
10997 assert((Constructor->isDefaulted() && Constructor->isDefaultConstructor() &&
10998 !Constructor->doesThisDeclarationHaveABody() &&
10999 !Constructor->isDeleted()) &&
11000 "DefineImplicitDefaultConstructor - call it for implicit default ctor");
11001 if (Constructor->willHaveBody() || Constructor->isInvalidDecl())
11002 return;
11003
11004 CXXRecordDecl *ClassDecl = Constructor->getParent();
11005 assert(ClassDecl && "DefineImplicitDefaultConstructor - invalid constructor");
11006
11007 SynthesizedFunctionScope Scope(*this, Constructor);
11008
11009 // The exception specification is needed because we are defining the
11010 // function.
11011 ResolveExceptionSpec(CurrentLocation,
11012 Constructor->getType()->castAs<FunctionProtoType>());
11013 MarkVTableUsed(CurrentLocation, ClassDecl);
11014
11015 // Add a context note for diagnostics produced after this point.
11016 Scope.addContextNote(CurrentLocation);
11017
11018 if (SetCtorInitializers(Constructor, /*AnyErrors=*/false)) {
11019 Constructor->setInvalidDecl();
11020 return;
11021 }
11022
11023 SourceLocation Loc = Constructor->getEndLoc().isValid()
11024 ? Constructor->getEndLoc()
11025 : Constructor->getLocation();
11026 Constructor->setBody(new (Context) CompoundStmt(Loc));
11027 Constructor->markUsed(Context);
11028
11029 if (ASTMutationListener *L = getASTMutationListener()) {
11030 L->CompletedImplicitDefinition(Constructor);
11031 }
11032
11033 DiagnoseUninitializedFields(*this, Constructor);
11034 }
11035
11036 void Sema::ActOnFinishDelayedMemberInitializers(Decl *D) {
11037 // Perform any delayed checks on exception specifications.
11038 CheckDelayedMemberExceptionSpecs();
11039 }
11040
11041 /// Find or create the fake constructor we synthesize to model constructing an
11042 /// object of a derived class via a constructor of a base class.
11043 CXXConstructorDecl *
11044 Sema::findInheritingConstructor(SourceLocation Loc,
11045 CXXConstructorDecl *BaseCtor,
11046 ConstructorUsingShadowDecl *Shadow) {
11047 CXXRecordDecl *Derived = Shadow->getParent();
11048 SourceLocation UsingLoc = Shadow->getLocation();
11049
11050 // FIXME: Add a new kind of DeclarationName for an inherited constructor.
11051 // For now we use the name of the base class constructor as a member of the
11052 // derived class to indicate a (fake) inherited constructor name.
11053 DeclarationName Name = BaseCtor->getDeclName();
11054
11055 // Check to see if we already have a fake constructor for this inherited
11056 // constructor call.
11057 for (NamedDecl *Ctor : Derived->lookup(Name))
11058 if (declaresSameEntity(cast<CXXConstructorDecl>(Ctor)
11059 ->getInheritedConstructor()
11060 .getConstructor(),
11061 BaseCtor))
11062 return cast<CXXConstructorDecl>(Ctor);
11063
11064 DeclarationNameInfo NameInfo(Name, UsingLoc);
11065 TypeSourceInfo *TInfo =
11066 Context.getTrivialTypeSourceInfo(BaseCtor->getType(), UsingLoc);
11067 FunctionProtoTypeLoc ProtoLoc =
11068 TInfo->getTypeLoc().IgnoreParens().castAs<FunctionProtoTypeLoc>();
11069
11070 // Check the inherited constructor is valid and find the list of base classes
11071 // from which it was inherited.
11072 InheritedConstructorInfo ICI(*this, Loc, Shadow);
11073
11074 bool Constexpr =
11075 BaseCtor->isConstexpr() &&
11076 defaultedSpecialMemberIsConstexpr(*this, Derived, CXXDefaultConstructor,
11077 false, BaseCtor, &ICI);
11078
11079 CXXConstructorDecl *DerivedCtor = CXXConstructorDecl::Create(
11080 Context, Derived, UsingLoc, NameInfo, TInfo->getType(), TInfo,
11081 BaseCtor->isExplicit(), /*Inline=*/true,
11082 /*ImplicitlyDeclared=*/true, Constexpr,
11083 InheritedConstructor(Shadow, BaseCtor));
11084 if (Shadow->isInvalidDecl())
11085 DerivedCtor->setInvalidDecl();
11086
11087 // Build an unevaluated exception specification for this fake constructor.
11088 const FunctionProtoType *FPT = TInfo->getType()->castAs<FunctionProtoType>();
11089 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo();
11090 EPI.ExceptionSpec.Type = EST_Unevaluated;
11091 EPI.ExceptionSpec.SourceDecl = DerivedCtor;
11092 DerivedCtor->setType(Context.getFunctionType(FPT->getReturnType(),
11093 FPT->getParamTypes(), EPI));
11094
11095 // Build the parameter declarations.
11096 SmallVector<ParmVarDecl *, 16> ParamDecls;
11097 for (unsigned I = 0, N = FPT->getNumParams(); I != N; ++I) {
11098 TypeSourceInfo *TInfo =
11099 Context.getTrivialTypeSourceInfo(FPT->getParamType(I), UsingLoc);
11100 ParmVarDecl *PD = ParmVarDecl::Create(
11101 Context, DerivedCtor, UsingLoc, UsingLoc, /*IdentifierInfo=*/nullptr,
11102 FPT->getParamType(I), TInfo, SC_None, /*DefaultArg=*/nullptr);
11103 PD->setScopeInfo(0, I);
11104 PD->setImplicit();
11105 // Ensure attributes are propagated onto parameters (this matters for
11106 // format, pass_object_size, ...).
11107 mergeDeclAttributes(PD, BaseCtor->getParamDecl(I));
11108 ParamDecls.push_back(PD);
11109 ProtoLoc.setParam(I, PD);
11110 }
11111
11112 // Set up the new constructor.
11113 assert(!BaseCtor->isDeleted() && "should not use deleted constructor");
11114 DerivedCtor->setAccess(BaseCtor->getAccess());
11115 DerivedCtor->setParams(ParamDecls);
11116 Derived->addDecl(DerivedCtor);
11117
11118 if (ShouldDeleteSpecialMember(DerivedCtor, CXXDefaultConstructor, &ICI))
11119 SetDeclDeleted(DerivedCtor, UsingLoc);
11120
11121 return DerivedCtor;
11122 }
11123
11124 void Sema::NoteDeletedInheritingConstructor(CXXConstructorDecl *Ctor) {
11125 InheritedConstructorInfo ICI(*this, Ctor->getLocation(),
11126 Ctor->getInheritedConstructor().getShadowDecl());
11127 ShouldDeleteSpecialMember(Ctor, CXXDefaultConstructor, &ICI,
11128 /*Diagnose*/true);
11129 }
11130
11131 void Sema::DefineInheritingConstructor(SourceLocation CurrentLocation,
11132 CXXConstructorDecl *Constructor) {
11133 CXXRecordDecl *ClassDecl = Constructor->getParent();
11134 assert(Constructor->getInheritedConstructor() &&
11135 !Constructor->doesThisDeclarationHaveABody() &&
11136 !Constructor->isDeleted());
11137 if (Constructor->willHaveBody() || Constructor->isInvalidDecl())
11138 return;
11139
11140 // Initializations are performed "as if by a defaulted default constructor",
11141 // so enter the appropriate scope.
11142 SynthesizedFunctionScope Scope(*this, Constructor);
11143
11144 // The exception specification is needed because we are defining the
11145 // function.
11146 ResolveExceptionSpec(CurrentLocation,
11147 Constructor->getType()->castAs<FunctionProtoType>());
11148 MarkVTableUsed(CurrentLocation, ClassDecl);
11149
11150 // Add a context note for diagnostics produced after this point.
11151 Scope.addContextNote(CurrentLocation);
11152
11153 ConstructorUsingShadowDecl *Shadow =
11154 Constructor->getInheritedConstructor().getShadowDecl();
11155 CXXConstructorDecl *InheritedCtor =
11156 Constructor->getInheritedConstructor().getConstructor();
11157
11158 // [class.inhctor.init]p1:
11159 // initialization proceeds as if a defaulted default constructor is used to
11160 // initialize the D object and each base class subobject from which the
11161 // constructor was inherited
11162
11163 InheritedConstructorInfo ICI(*this, CurrentLocation, Shadow);
11164 CXXRecordDecl *RD = Shadow->getParent();
11165 SourceLocation InitLoc = Shadow->getLocation();
11166
11167 // Build explicit initializers for all base classes from which the
11168 // constructor was inherited.
11169 SmallVector<CXXCtorInitializer*, 8> Inits;
11170 for (bool VBase : {false, true}) {
11171 for (CXXBaseSpecifier &B : VBase ? RD->vbases() : RD->bases()) {
11172 if (B.isVirtual() != VBase)
11173 continue;
11174
11175 auto *BaseRD = B.getType()->getAsCXXRecordDecl();
11176 if (!BaseRD)
11177 continue;
11178
11179 auto BaseCtor = ICI.findConstructorForBase(BaseRD, InheritedCtor);
11180 if (!BaseCtor.first)
11181 continue;
11182
11183 MarkFunctionReferenced(CurrentLocation, BaseCtor.first);
11184 ExprResult Init = new (Context) CXXInheritedCtorInitExpr(
11185 InitLoc, B.getType(), BaseCtor.first, VBase, BaseCtor.second);
11186
11187 auto *TInfo = Context.getTrivialTypeSourceInfo(B.getType(), InitLoc);
11188 Inits.push_back(new (Context) CXXCtorInitializer(
11189 Context, TInfo, VBase, InitLoc, Init.get(), InitLoc,
11190 SourceLocation()));
11191 }
11192 }
11193
11194 // We now proceed as if for a defaulted default constructor, with the relevant
11195 // initializers replaced.
11196
11197 if (SetCtorInitializers(Constructor, /*AnyErrors*/false, Inits)) {
11198 Constructor->setInvalidDecl();
11199 return;
11200 }
11201
11202 Constructor->setBody(new (Context) CompoundStmt(InitLoc));
11203 Constructor->markUsed(Context);
11204
11205 if (ASTMutationListener *L = getASTMutationListener()) {
11206 L->CompletedImplicitDefinition(Constructor);
11207 }
11208
11209 DiagnoseUninitializedFields(*this, Constructor);
11210 }
11211
11212 CXXDestructorDecl *Sema::DeclareImplicitDestructor(CXXRecordDecl *ClassDecl) {
11213 // C++ [class.dtor]p2:
11214 // If a class has no user-declared destructor, a destructor is
11215 // declared implicitly. An implicitly-declared destructor is an
11216 // inline public member of its class.
11217 assert(ClassDecl->needsImplicitDestructor());
11218
11219 DeclaringSpecialMember DSM(*this, ClassDecl, CXXDestructor);
11220 if (DSM.isAlreadyBeingDeclared())
11221 return nullptr;
11222
11223 // Create the actual destructor declaration.
11224 CanQualType ClassType
11225 = Context.getCanonicalType(Context.getTypeDeclType(ClassDecl));
11226 SourceLocation ClassLoc = ClassDecl->getLocation();
11227 DeclarationName Name
11228 = Context.DeclarationNames.getCXXDestructorName(ClassType);
11229 DeclarationNameInfo NameInfo(Name, ClassLoc);
11230 CXXDestructorDecl *Destructor
11231 = CXXDestructorDecl::Create(Context, ClassDecl, ClassLoc, NameInfo,
11232 QualType(), nullptr, /*isInline=*/true,
11233 /*isImplicitlyDeclared=*/true);
11234 Destructor->setAccess(AS_public);
11235 Destructor->setDefaulted();
11236
11237 if (getLangOpts().CUDA) {
11238 inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXDestructor,
11239 Destructor,
11240 /* ConstRHS */ false,
11241 /* Diagnose */ false);
11242 }
11243
11244 setupImplicitSpecialMemberType(Destructor, Context.VoidTy, None);
11245
11246 // We don't need to use SpecialMemberIsTrivial here; triviality for
11247 // destructors is easy to compute.
11248 Destructor->setTrivial(ClassDecl->hasTrivialDestructor());
11249 Destructor->setTrivialForCall(ClassDecl->hasAttr<TrivialABIAttr>() ||
11250 ClassDecl->hasTrivialDestructorForCall());
11251
11252 // Note that we have declared this destructor.
11253 ++ASTContext::NumImplicitDestructorsDeclared;
11254
11255 Scope *S = getScopeForContext(ClassDecl);
11256 CheckImplicitSpecialMemberDeclaration(S, Destructor);
11257
11258 // We can't check whether an implicit destructor is deleted before we complete
11259 // the definition of the class, because its validity depends on the alignment
11260 // of the class. We'll check this from ActOnFields once the class is complete.
11261 if (ClassDecl->isCompleteDefinition() &&
11262 ShouldDeleteSpecialMember(Destructor, CXXDestructor))
11263 SetDeclDeleted(Destructor, ClassLoc);
11264
11265 // Introduce this destructor into its scope.
11266 if (S)
11267 PushOnScopeChains(Destructor, S, false);
11268 ClassDecl->addDecl(Destructor);
11269
11270 return Destructor;
11271 }
11272
11273 void Sema::DefineImplicitDestructor(SourceLocation CurrentLocation,
11274 CXXDestructorDecl *Destructor) {
11275 assert((Destructor->isDefaulted() &&
11276 !Destructor->doesThisDeclarationHaveABody() &&
11277 !Destructor->isDeleted()) &&
11278 "DefineImplicitDestructor - call it for implicit default dtor");
11279 if (Destructor->willHaveBody() || Destructor->isInvalidDecl())
11280 return;
11281
11282 CXXRecordDecl *ClassDecl = Destructor->getParent();
11283 assert(ClassDecl && "DefineImplicitDestructor - invalid destructor");
11284
11285 SynthesizedFunctionScope Scope(*this, Destructor);
11286
11287 // The exception specification is needed because we are defining the
11288 // function.
11289 ResolveExceptionSpec(CurrentLocation,
11290 Destructor->getType()->castAs<FunctionProtoType>());
11291 MarkVTableUsed(CurrentLocation, ClassDecl);
11292
11293 // Add a context note for diagnostics produced after this point.
11294 Scope.addContextNote(CurrentLocation);
11295
11296 MarkBaseAndMemberDestructorsReferenced(Destructor->getLocation(),
11297 Destructor->getParent());
11298
11299 if (CheckDestructor(Destructor)) {
11300 Destructor->setInvalidDecl();
11301 return;
11302 }
11303
11304 SourceLocation Loc = Destructor->getEndLoc().isValid()
11305 ? Destructor->getEndLoc()
11306 : Destructor->getLocation();
11307 Destructor->setBody(new (Context) CompoundStmt(Loc));
11308 Destructor->markUsed(Context);
11309
11310 if (ASTMutationListener *L = getASTMutationListener()) {
11311 L->CompletedImplicitDefinition(Destructor);
11312 }
11313 }
11314
11315 /// Perform any semantic analysis which needs to be delayed until all
11316 /// pending class member declarations have been parsed.
11317 void Sema::ActOnFinishCXXMemberDecls() {
11318 // If the context is an invalid C++ class, just suppress these checks.
11319 if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(CurContext)) {
11320 if (Record->isInvalidDecl()) {
11321 DelayedOverridingExceptionSpecChecks.clear();
11322 DelayedEquivalentExceptionSpecChecks.clear();
11323 DelayedDefaultedMemberExceptionSpecs.clear();
11324 return;
11325 }
11326 checkForMultipleExportedDefaultConstructors(*this, Record);
11327 }
11328 }
11329
11330 void Sema::ActOnFinishCXXNonNestedClass(Decl *D) {
11331 referenceDLLExportedClassMethods();
11332 }
11333
11334 void Sema::referenceDLLExportedClassMethods() {
11335 if (!DelayedDllExportClasses.empty()) {
11336 // Calling ReferenceDllExportedMembers might cause the current function to
11337 // be called again, so use a local copy of DelayedDllExportClasses.
11338 SmallVector<CXXRecordDecl *, 4> WorkList;
11339 std::swap(DelayedDllExportClasses, WorkList);
11340 for (CXXRecordDecl *Class : WorkList)
11341 ReferenceDllExportedMembers(*this, Class);
11342 }
11343 }
11344
11345 void Sema::AdjustDestructorExceptionSpec(CXXDestructorDecl *Destructor) {
11346 assert(getLangOpts().CPlusPlus11 &&
11347 "adjusting dtor exception specs was introduced in c++11");
11348
11349 if (Destructor->isDependentContext())
11350 return;
11351
11352 // C++11 [class.dtor]p3:
11353 // A declaration of a destructor that does not have an exception-
11354 // specification is implicitly considered to have the same exception-
11355 // specification as an implicit declaration.
11356 const FunctionProtoType *DtorType = Destructor->getType()->
11357 getAs<FunctionProtoType>();
11358 if (DtorType->hasExceptionSpec())
11359 return;
11360
11361 // Replace the destructor's type, building off the existing one. Fortunately,
11362 // the only thing of interest in the destructor type is its extended info.
11363 // The return and arguments are fixed.
11364 FunctionProtoType::ExtProtoInfo EPI = DtorType->getExtProtoInfo();
11365 EPI.ExceptionSpec.Type = EST_Unevaluated;
11366 EPI.ExceptionSpec.SourceDecl = Destructor;
11367 Destructor->setType(Context.getFunctionType(Context.VoidTy, None, EPI));
11368
11369 // FIXME: If the destructor has a body that could throw, and the newly created
11370 // spec doesn't allow exceptions, we should emit a warning, because this
11371 // change in behavior can break conforming C++03 programs at runtime.
11372 // However, we don't have a body or an exception specification yet, so it
11373 // needs to be done somewhere else.
11374 }
11375
11376 namespace {
11377 /// An abstract base class for all helper classes used in building the
11378 // copy/move operators. These classes serve as factory functions and help us
11379 // avoid using the same Expr* in the AST twice.
11380 class ExprBuilder {
11381 ExprBuilder(const ExprBuilder&) = delete;
11382 ExprBuilder &operator=(const ExprBuilder&) = delete;
11383
11384 protected:
11385 static Expr *assertNotNull(Expr *E) {
11386 assert(E && "Expression construction must not fail.");
11387 return E;
11388 }
11389
11390 public:
11391 ExprBuilder() {}
11392 virtual ~ExprBuilder() {}
11393
11394 virtual Expr *build(Sema &S, SourceLocation Loc) const = 0;
11395 };
11396
11397 class RefBuilder: public ExprBuilder {
11398 VarDecl *Var;
11399 QualType VarType;
11400
11401 public:
11402 Expr *build(Sema &S, SourceLocation Loc) const override {
11403 return assertNotNull(S.BuildDeclRefExpr(Var, VarType, VK_LValue, Loc).get());
11404 }
11405
11406 RefBuilder(VarDecl *Var, QualType VarType)
11407 : Var(Var), VarType(VarType) {}
11408 };
11409
11410 class ThisBuilder: public ExprBuilder {
11411 public:
11412 Expr *build(Sema &S, SourceLocation Loc) const override {
11413 return assertNotNull(S.ActOnCXXThis(Loc).getAs<Expr>());
11414 }
11415 };
11416
11417 class CastBuilder: public ExprBuilder {
11418 const ExprBuilder &Builder;
11419 QualType Type;
11420 ExprValueKind Kind;
11421 const CXXCastPath &Path;
11422
11423 public:
11424 Expr *build(Sema &S, SourceLocation Loc) const override {
11425 return assertNotNull(S.ImpCastExprToType(Builder.build(S, Loc), Type,
11426 CK_UncheckedDerivedToBase, Kind,
11427 &Path).get());
11428 }
11429
11430 CastBuilder(const ExprBuilder &Builder, QualType Type, ExprValueKind Kind,
11431 const CXXCastPath &Path)
11432 : Builder(Builder), Type(Type), Kind(Kind), Path(Path) {}
11433 };
11434
11435 class DerefBuilder: public ExprBuilder {
11436 const ExprBuilder &Builder;
11437
11438 public:
11439 Expr *build(Sema &S, SourceLocation Loc) const override {
11440 return assertNotNull(
11441 S.CreateBuiltinUnaryOp(Loc, UO_Deref, Builder.build(S, Loc)).get());
11442 }
11443
11444 DerefBuilder(const ExprBuilder &Builder) : Builder(Builder) {}
11445 };
11446
11447 class MemberBuilder: public ExprBuilder {
11448 const ExprBuilder &Builder;
11449 QualType Type;
11450 CXXScopeSpec SS;
11451 bool IsArrow;
11452 LookupResult &MemberLookup;
11453
11454 public:
11455 Expr *build(Sema &S, SourceLocation Loc) const override {
11456 return assertNotNull(S.BuildMemberReferenceExpr(
11457 Builder.build(S, Loc), Type, Loc, IsArrow, SS, SourceLocation(),
11458 nullptr, MemberLookup, nullptr, nullptr).get());
11459 }
11460
11461 MemberBuilder(const ExprBuilder &Builder, QualType Type, bool IsArrow,
11462 LookupResult &MemberLookup)
11463 : Builder(Builder), Type(Type), IsArrow(IsArrow),
11464 MemberLookup(MemberLookup) {}
11465 };
11466
11467 class MoveCastBuilder: public ExprBuilder {
11468 const ExprBuilder &Builder;
11469
11470 public:
11471 Expr *build(Sema &S, SourceLocation Loc) const override {
11472 return assertNotNull(CastForMoving(S, Builder.build(S, Loc)));
11473 }
11474
11475 MoveCastBuilder(const ExprBuilder &Builder) : Builder(Builder) {}
11476 };
11477
11478 class LvalueConvBuilder: public ExprBuilder {
11479 const ExprBuilder &Builder;
11480
11481 public:
11482 Expr *build(Sema &S, SourceLocation Loc) const override {
11483 return assertNotNull(
11484 S.DefaultLvalueConversion(Builder.build(S, Loc)).get());
11485 }
11486
11487 LvalueConvBuilder(const ExprBuilder &Builder) : Builder(Builder) {}
11488 };
11489
11490 class SubscriptBuilder: public ExprBuilder {
11491 const ExprBuilder &Base;
11492 const ExprBuilder &Index;
11493
11494 public:
11495 Expr *build(Sema &S, SourceLocation Loc) const override {
11496 return assertNotNull(S.CreateBuiltinArraySubscriptExpr(
11497 Base.build(S, Loc), Loc, Index.build(S, Loc), Loc).get());
11498 }
11499
11500 SubscriptBuilder(const ExprBuilder &Base, const ExprBuilder &Index)
11501 : Base(Base), Index(Index) {}
11502 };
11503
11504 } // end anonymous namespace
11505
11506 /// When generating a defaulted copy or move assignment operator, if a field
11507 /// should be copied with __builtin_memcpy rather than via explicit assignments,
11508 /// do so. This optimization only applies for arrays of scalars, and for arrays
11509 /// of class type where the selected copy/move-assignment operator is trivial.
11510 static StmtResult
11511 buildMemcpyForAssignmentOp(Sema &S, SourceLocation Loc, QualType T,
11512 const ExprBuilder &ToB, const ExprBuilder &FromB) {
11513 // Compute the size of the memory buffer to be copied.
11514 QualType SizeType = S.Context.getSizeType();
11515 llvm::APInt Size(S.Context.getTypeSize(SizeType),
11516 S.Context.getTypeSizeInChars(T).getQuantity());
11517
11518 // Take the address of the field references for "from" and "to". We
11519 // directly construct UnaryOperators here because semantic analysis
11520 // does not permit us to take the address of an xvalue.
11521 Expr *From = FromB.build(S, Loc);
11522 From = new (S.Context) UnaryOperator(From, UO_AddrOf,
11523 S.Context.getPointerType(From->getType()),
11524 VK_RValue, OK_Ordinary, Loc, false);
11525 Expr *To = ToB.build(S, Loc);
11526 To = new (S.Context) UnaryOperator(To, UO_AddrOf,
11527 S.Context.getPointerType(To->getType()),
11528 VK_RValue, OK_Ordinary, Loc, false);
11529
11530 const Type *E = T->getBaseElementTypeUnsafe();
11531 bool NeedsCollectableMemCpy =
11532 E->isRecordType() && E->getAs<RecordType>()->getDecl()->hasObjectMember();
11533
11534 // Create a reference to the __builtin_objc_memmove_collectable function
11535 StringRef MemCpyName = NeedsCollectableMemCpy ?
11536 "__builtin_objc_memmove_collectable" :
11537 "__builtin_memcpy";
11538 LookupResult R(S, &S.Context.Idents.get(MemCpyName), Loc,
11539 Sema::LookupOrdinaryName);
11540 S.LookupName(R, S.TUScope, true);
11541
11542 FunctionDecl *MemCpy = R.getAsSingle<FunctionDecl>();
11543 if (!MemCpy)
11544 // Something went horribly wrong earlier, and we will have complained
11545 // about it.
11546 return StmtError();
11547
11548 ExprResult MemCpyRef = S.BuildDeclRefExpr(MemCpy, S.Context.BuiltinFnTy,
11549 VK_RValue, Loc, nullptr);
11550 assert(MemCpyRef.isUsable() && "Builtin reference cannot fail");
11551
11552 Expr *CallArgs[] = {
11553 To, From, IntegerLiteral::Create(S.Context, Size, SizeType, Loc)
11554 };
11555 ExprResult Call = S.ActOnCallExpr(/*Scope=*/nullptr, MemCpyRef.get(),
11556 Loc, CallArgs, Loc);
11557
11558 assert(!Call.isInvalid() && "Call to __builtin_memcpy cannot fail!");
11559 return Call.getAs<Stmt>();
11560 }
11561
11562 /// Builds a statement that copies/moves the given entity from \p From to
11563 /// \c To.
11564 ///
11565 /// This routine is used to copy/move the members of a class with an
11566 /// implicitly-declared copy/move assignment operator. When the entities being
11567 /// copied are arrays, this routine builds for loops to copy them.
11568 ///
11569 /// \param S The Sema object used for type-checking.
11570 ///
11571 /// \param Loc The location where the implicit copy/move is being generated.
11572 ///
11573 /// \param T The type of the expressions being copied/moved. Both expressions
11574 /// must have this type.
11575 ///
11576 /// \param To The expression we are copying/moving to.
11577 ///
11578 /// \param From The expression we are copying/moving from.
11579 ///
11580 /// \param CopyingBaseSubobject Whether we're copying/moving a base subobject.
11581 /// Otherwise, it's a non-static member subobject.
11582 ///
11583 /// \param Copying Whether we're copying or moving.
11584 ///
11585 /// \param Depth Internal parameter recording the depth of the recursion.
11586 ///
11587 /// \returns A statement or a loop that copies the expressions, or StmtResult(0)
11588 /// if a memcpy should be used instead.
11589 static StmtResult
11590 buildSingleCopyAssignRecursively(Sema &S, SourceLocation Loc, QualType T,
11591 const ExprBuilder &To, const ExprBuilder &From,
11592 bool CopyingBaseSubobject, bool Copying,
11593 unsigned Depth = 0) {
11594 // C++11 [class.copy]p28:
11595 // Each subobject is assigned in the manner appropriate to its type:
11596 //
11597 // - if the subobject is of class type, as if by a call to operator= with
11598 // the subobject as the object expression and the corresponding
11599 // subobject of x as a single function argument (as if by explicit
11600 // qualification; that is, ignoring any possible virtual overriding
11601 // functions in more derived classes);
11602 //
11603 // C++03 [class.copy]p13:
11604 // - if the subobject is of class type, the copy assignment operator for
11605 // the class is used (as if by explicit qualification; that is,
11606 // ignoring any possible virtual overriding functions in more derived
11607 // classes);
11608 if (const RecordType *RecordTy = T->getAs<RecordType>()) {
11609 CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(RecordTy->getDecl());
11610
11611 // Look for operator=.
11612 DeclarationName Name
11613 = S.Context.DeclarationNames.getCXXOperatorName(OO_Equal);
11614 LookupResult OpLookup(S, Name, Loc, Sema::LookupOrdinaryName);
11615 S.LookupQualifiedName(OpLookup, ClassDecl, false);
11616
11617 // Prior to C++11, filter out any result that isn't a copy/move-assignment
11618 // operator.
11619 if (!S.getLangOpts().CPlusPlus11) {
11620 LookupResult::Filter F = OpLookup.makeFilter();
11621 while (F.hasNext()) {
11622 NamedDecl *D = F.next();
11623 if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D))
11624 if (Method->isCopyAssignmentOperator() ||
11625 (!Copying && Method->isMoveAssignmentOperator()))
11626 continue;
11627
11628 F.erase();
11629 }
11630 F.done();
11631 }
11632
11633 // Suppress the protected check (C++ [class.protected]) for each of the
11634 // assignment operators we found. This strange dance is required when
11635 // we're assigning via a base classes's copy-assignment operator. To
11636 // ensure that we're getting the right base class subobject (without
11637 // ambiguities), we need to cast "this" to that subobject type; to
11638 // ensure that we don't go through the virtual call mechanism, we need
11639 // to qualify the operator= name with the base class (see below). However,
11640 // this means that if the base class has a protected copy assignment
11641 // operator, the protected member access check will fail. So, we
11642 // rewrite "protected" access to "public" access in this case, since we
11643 // know by construction that we're calling from a derived class.
11644 if (CopyingBaseSubobject) {
11645 for (LookupResult::iterator L = OpLookup.begin(), LEnd = OpLookup.end();
11646 L != LEnd; ++L) {
11647 if (L.getAccess() == AS_protected)
11648 L.setAccess(AS_public);
11649 }
11650 }
11651
11652 // Create the nested-name-specifier that will be used to qualify the
11653 // reference to operator=; this is required to suppress the virtual
11654 // call mechanism.
11655 CXXScopeSpec SS;
11656 const Type *CanonicalT = S.Context.getCanonicalType(T.getTypePtr());
11657 SS.MakeTrivial(S.Context,
11658 NestedNameSpecifier::Create(S.Context, nullptr, false,
11659 CanonicalT),
11660 Loc);
11661
11662 // Create the reference to operator=.
11663 ExprResult OpEqualRef
11664 = S.BuildMemberReferenceExpr(To.build(S, Loc), T, Loc, /*isArrow=*/false,
11665 SS, /*TemplateKWLoc=*/SourceLocation(),
11666 /*FirstQualifierInScope=*/nullptr,
11667 OpLookup,
11668 /*TemplateArgs=*/nullptr, /*S*/nullptr,
11669 /*SuppressQualifierCheck=*/true);
11670 if (OpEqualRef.isInvalid())
11671 return StmtError();
11672
11673 // Build the call to the assignment operator.
11674
11675 Expr *FromInst = From.build(S, Loc);
11676 ExprResult Call = S.BuildCallToMemberFunction(/*Scope=*/nullptr,
11677 OpEqualRef.getAs<Expr>(),
11678 Loc, FromInst, Loc);
11679 if (Call.isInvalid())
11680 return StmtError();
11681
11682 // If we built a call to a trivial 'operator=' while copying an array,
11683 // bail out. We'll replace the whole shebang with a memcpy.
11684 CXXMemberCallExpr *CE = dyn_cast<CXXMemberCallExpr>(Call.get());
11685 if (CE && CE->getMethodDecl()->isTrivial() && Depth)
11686 return StmtResult((Stmt*)nullptr);
11687
11688 // Convert to an expression-statement, and clean up any produced
11689 // temporaries.
11690 return S.ActOnExprStmt(Call);
11691 }
11692
11693 // - if the subobject is of scalar type, the built-in assignment
11694 // operator is used.
11695 const ConstantArrayType *ArrayTy = S.Context.getAsConstantArrayType(T);
11696 if (!ArrayTy) {
11697 ExprResult Assignment = S.CreateBuiltinBinOp(
11698 Loc, BO_Assign, To.build(S, Loc), From.build(S, Loc));
11699 if (Assignment.isInvalid())
11700 return StmtError();
11701 return S.ActOnExprStmt(Assignment);
11702 }
11703
11704 // - if the subobject is an array, each element is assigned, in the
11705 // manner appropriate to the element type;
11706
11707 // Construct a loop over the array bounds, e.g.,
11708 //
11709 // for (__SIZE_TYPE__ i0 = 0; i0 != array-size; ++i0)
11710 //
11711 // that will copy each of the array elements.
11712 QualType SizeType = S.Context.getSizeType();
11713
11714 // Create the iteration variable.
11715 IdentifierInfo *IterationVarName = nullptr;
11716 {
11717 SmallString<8> Str;
11718 llvm::raw_svector_ostream OS(Str);
11719 OS << "__i" << Depth;
11720 IterationVarName = &S.Context.Idents.get(OS.str());
11721 }
11722 VarDecl *IterationVar = VarDecl::Create(S.Context, S.CurContext, Loc, Loc,
11723 IterationVarName, SizeType,
11724 S.Context.getTrivialTypeSourceInfo(SizeType, Loc),
11725 SC_None);
11726
11727 // Initialize the iteration variable to zero.
11728 llvm::APInt Zero(S.Context.getTypeSize(SizeType), 0);
11729 IterationVar->setInit(IntegerLiteral::Create(S.Context, Zero, SizeType, Loc));
11730
11731 // Creates a reference to the iteration variable.
11732 RefBuilder IterationVarRef(IterationVar, SizeType);
11733 LvalueConvBuilder IterationVarRefRVal(IterationVarRef);
11734
11735 // Create the DeclStmt that holds the iteration variable.
11736 Stmt *InitStmt = new (S.Context) DeclStmt(DeclGroupRef(IterationVar),Loc,Loc);
11737
11738 // Subscript the "from" and "to" expressions with the iteration variable.
11739 SubscriptBuilder FromIndexCopy(From, IterationVarRefRVal);
11740 MoveCastBuilder FromIndexMove(FromIndexCopy);
11741 const ExprBuilder *FromIndex;
11742 if (Copying)
11743 FromIndex = &FromIndexCopy;
11744 else
11745 FromIndex = &FromIndexMove;
11746
11747 SubscriptBuilder ToIndex(To, IterationVarRefRVal);
11748
11749 // Build the copy/move for an individual element of the array.
11750 StmtResult Copy =
11751 buildSingleCopyAssignRecursively(S, Loc, ArrayTy->getElementType(),
11752 ToIndex, *FromIndex, CopyingBaseSubobject,
11753 Copying, Depth + 1);
11754 // Bail out if copying fails or if we determined that we should use memcpy.
11755 if (Copy.isInvalid() || !Copy.get())
11756 return Copy;
11757
11758 // Create the comparison against the array bound.
11759 llvm::APInt Upper
11760 = ArrayTy->getSize().zextOrTrunc(S.Context.getTypeSize(SizeType));
11761 Expr *Comparison
11762 = new (S.Context) BinaryOperator(IterationVarRefRVal.build(S, Loc),
11763 IntegerLiteral::Create(S.Context, Upper, SizeType, Loc),
11764 BO_NE, S.Context.BoolTy,
11765 VK_RValue, OK_Ordinary, Loc, FPOptions());
11766
11767 // Create the pre-increment of the iteration variable. We can determine
11768 // whether the increment will overflow based on the value of the array
11769 // bound.
11770 Expr *Increment = new (S.Context)
11771 UnaryOperator(IterationVarRef.build(S, Loc), UO_PreInc, SizeType,
11772 VK_LValue, OK_Ordinary, Loc, Upper.isMaxValue());
11773
11774 // Construct the loop that copies all elements of this array.
11775 return S.ActOnForStmt(
11776 Loc, Loc, InitStmt,
11777 S.ActOnCondition(nullptr, Loc, Comparison, Sema::ConditionKind::Boolean),
11778 S.MakeFullDiscardedValueExpr(Increment), Loc, Copy.get());
11779 }
11780
11781 static StmtResult
11782 buildSingleCopyAssign(Sema &S, SourceLocation Loc, QualType T,
11783 const ExprBuilder &To, const ExprBuilder &From,
11784 bool CopyingBaseSubobject, bool Copying) {
11785 // Maybe we should use a memcpy?
11786 if (T->isArrayType() && !T.isConstQualified() && !T.isVolatileQualified() &&
11787 T.isTriviallyCopyableType(S.Context))
11788 return buildMemcpyForAssignmentOp(S, Loc, T, To, From);
11789
11790 StmtResult Result(buildSingleCopyAssignRecursively(S, Loc, T, To, From,
11791 CopyingBaseSubobject,
11792 Copying, 0));
11793
11794 // If we ended up picking a trivial assignment operator for an array of a
11795 // non-trivially-copyable class type, just emit a memcpy.
11796 if (!Result.isInvalid() && !Result.get())
11797 return buildMemcpyForAssignmentOp(S, Loc, T, To, From);
11798
11799 return Result;
11800 }
11801
11802 CXXMethodDecl *Sema::DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl) {
11803 // Note: The following rules are largely analoguous to the copy
11804 // constructor rules. Note that virtual bases are not taken into account
11805 // for determining the argument type of the operator. Note also that
11806 // operators taking an object instead of a reference are allowed.
11807 assert(ClassDecl->needsImplicitCopyAssignment());
11808
11809 DeclaringSpecialMember DSM(*this, ClassDecl, CXXCopyAssignment);
11810 if (DSM.isAlreadyBeingDeclared())
11811 return nullptr;
11812
11813 QualType ArgType = Context.getTypeDeclType(ClassDecl);
11814 QualType RetType = Context.getLValueReferenceType(ArgType);
11815 bool Const = ClassDecl->implicitCopyAssignmentHasConstParam();
11816 if (Const)
11817 ArgType = ArgType.withConst();
11818
11819 if (Context.getLangOpts().OpenCLCPlusPlus)
11820 ArgType = Context.getAddrSpaceQualType(ArgType, LangAS::opencl_generic);
11821
11822 ArgType = Context.getLValueReferenceType(ArgType);
11823
11824 bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl,
11825 CXXCopyAssignment,
11826 Const);
11827
11828 // An implicitly-declared copy assignment operator is an inline public
11829 // member of its class.
11830 DeclarationName Name = Context.DeclarationNames.getCXXOperatorName(OO_Equal);
11831 SourceLocation ClassLoc = ClassDecl->getLocation();
11832 DeclarationNameInfo NameInfo(Name, ClassLoc);
11833 CXXMethodDecl *CopyAssignment =
11834 CXXMethodDecl::Create(Context, ClassDecl, ClassLoc, NameInfo, QualType(),
11835 /*TInfo=*/nullptr, /*StorageClass=*/SC_None,
11836 /*isInline=*/true, Constexpr, SourceLocation());
11837 CopyAssignment->setAccess(AS_public);
11838 CopyAssignment->setDefaulted();
11839 CopyAssignment->setImplicit();
11840
11841 if (getLangOpts().CUDA) {
11842 inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXCopyAssignment,
11843 CopyAssignment,
11844 /* ConstRHS */ Const,
11845 /* Diagnose */ false);
11846 }
11847
11848 setupImplicitSpecialMemberType(CopyAssignment, RetType, ArgType);
11849
11850 // Add the parameter to the operator.
11851 ParmVarDecl *FromParam = ParmVarDecl::Create(Context, CopyAssignment,
11852 ClassLoc, ClassLoc,
11853 /*Id=*/nullptr, ArgType,
11854 /*TInfo=*/nullptr, SC_None,
11855 nullptr);
11856 CopyAssignment->setParams(FromParam);
11857
11858 CopyAssignment->setTrivial(
11859 ClassDecl->needsOverloadResolutionForCopyAssignment()
11860 ? SpecialMemberIsTrivial(CopyAssignment, CXXCopyAssignment)
11861 : ClassDecl->hasTrivialCopyAssignment());
11862
11863 // Note that we have added this copy-assignment operator.
11864 ++ASTContext::NumImplicitCopyAssignmentOperatorsDeclared;
11865
11866 Scope *S = getScopeForContext(ClassDecl);
11867 CheckImplicitSpecialMemberDeclaration(S, CopyAssignment);
11868
11869 if (ShouldDeleteSpecialMember(CopyAssignment, CXXCopyAssignment))
11870 SetDeclDeleted(CopyAssignment, ClassLoc);
11871
11872 if (S)
11873 PushOnScopeChains(CopyAssignment, S, false);
11874 ClassDecl->addDecl(CopyAssignment);
11875
11876 return CopyAssignment;
11877 }
11878
11879 /// Diagnose an implicit copy operation for a class which is odr-used, but
11880 /// which is deprecated because the class has a user-declared copy constructor,
11881 /// copy assignment operator, or destructor.
11882 static void diagnoseDeprecatedCopyOperation(Sema &S, CXXMethodDecl *CopyOp) {
11883 assert(CopyOp->isImplicit());
11884
11885 CXXRecordDecl *RD = CopyOp->getParent();
11886 CXXMethodDecl *UserDeclaredOperation = nullptr;
11887
11888 // In Microsoft mode, assignment operations don't affect constructors and
11889 // vice versa.
11890 if (RD->hasUserDeclaredDestructor()) {
11891 UserDeclaredOperation = RD->getDestructor();
11892 } else if (!isa<CXXConstructorDecl>(CopyOp) &&
11893 RD->hasUserDeclaredCopyConstructor() &&
11894 !S.getLangOpts().MSVCCompat) {
11895 // Find any user-declared copy constructor.
11896 for (auto *I : RD->ctors()) {
11897 if (I->isCopyConstructor()) {
11898 UserDeclaredOperation = I;
11899 break;
11900 }
11901 }
11902 assert(UserDeclaredOperation);
11903 } else if (isa<CXXConstructorDecl>(CopyOp) &&
11904 RD->hasUserDeclaredCopyAssignment() &&
11905 !S.getLangOpts().MSVCCompat) {
11906 // Find any user-declared move assignment operator.
11907 for (auto *I : RD->methods()) {
11908 if (I->isCopyAssignmentOperator()) {
11909 UserDeclaredOperation = I;
11910 break;
11911 }
11912 }
11913 assert(UserDeclaredOperation);
11914 }
11915
11916 if (UserDeclaredOperation) {
11917 S.Diag(UserDeclaredOperation->getLocation(),
11918 diag::warn_deprecated_copy_operation)
11919 << RD << /*copy assignment*/!isa<CXXConstructorDecl>(CopyOp)
11920 << /*destructor*/isa<CXXDestructorDecl>(UserDeclaredOperation);
11921 }
11922 }
11923
11924 void Sema::DefineImplicitCopyAssignment(SourceLocation CurrentLocation,
11925 CXXMethodDecl *CopyAssignOperator) {
11926 assert((CopyAssignOperator->isDefaulted() &&
11927 CopyAssignOperator->isOverloadedOperator() &&
11928 CopyAssignOperator->getOverloadedOperator() == OO_Equal &&
11929 !CopyAssignOperator->doesThisDeclarationHaveABody() &&
11930 !CopyAssignOperator->isDeleted()) &&
11931 "DefineImplicitCopyAssignment called for wrong function");
11932 if (CopyAssignOperator->willHaveBody() || CopyAssignOperator->isInvalidDecl())
11933 return;
11934
11935 CXXRecordDecl *ClassDecl = CopyAssignOperator->getParent();
11936 if (ClassDecl->isInvalidDecl()) {
11937 CopyAssignOperator->setInvalidDecl();
11938 return;
11939 }
11940
11941 SynthesizedFunctionScope Scope(*this, CopyAssignOperator);
11942
11943 // The exception specification is needed because we are defining the
11944 // function.
11945 ResolveExceptionSpec(CurrentLocation,
11946 CopyAssignOperator->getType()->castAs<FunctionProtoType>());
11947
11948 // Add a context note for diagnostics produced after this point.
11949 Scope.addContextNote(CurrentLocation);
11950
11951 // C++11 [class.copy]p18:
11952 // The [definition of an implicitly declared copy assignment operator] is
11953 // deprecated if the class has a user-declared copy constructor or a
11954 // user-declared destructor.
11955 if (getLangOpts().CPlusPlus11 && CopyAssignOperator->isImplicit())
11956 diagnoseDeprecatedCopyOperation(*this, CopyAssignOperator);
11957
11958 // C++0x [class.copy]p30:
11959 // The implicitly-defined or explicitly-defaulted copy assignment operator
11960 // for a non-union class X performs memberwise copy assignment of its
11961 // subobjects. The direct base classes of X are assigned first, in the
11962 // order of their declaration in the base-specifier-list, and then the
11963 // immediate non-static data members of X are assigned, in the order in
11964 // which they were declared in the class definition.
11965
11966 // The statements that form the synthesized function body.
11967 SmallVector<Stmt*, 8> Statements;
11968
11969 // The parameter for the "other" object, which we are copying from.
11970 ParmVarDecl *Other = CopyAssignOperator->getParamDecl(0);
11971 Qualifiers OtherQuals = Other->getType().getQualifiers();
11972 QualType OtherRefType = Other->getType();
11973 if (const LValueReferenceType *OtherRef
11974 = OtherRefType->getAs<LValueReferenceType>()) {
11975 OtherRefType = OtherRef->getPointeeType();
11976 OtherQuals = OtherRefType.getQualifiers();
11977 }
11978
11979 // Our location for everything implicitly-generated.
11980 SourceLocation Loc = CopyAssignOperator->getEndLoc().isValid()
11981 ? CopyAssignOperator->getEndLoc()
11982 : CopyAssignOperator->getLocation();
11983
11984 // Builds a DeclRefExpr for the "other" object.
11985 RefBuilder OtherRef(Other, OtherRefType);
11986
11987 // Builds the "this" pointer.
11988 ThisBuilder This;
11989
11990 // Assign base classes.
11991 bool Invalid = false;
11992 for (auto &Base : ClassDecl->bases()) {
11993 // Form the assignment:
11994 // static_cast<Base*>(this)->Base::operator=(static_cast<Base&>(other));
11995 QualType BaseType = Base.getType().getUnqualifiedType();
11996 if (!BaseType->isRecordType()) {
11997 Invalid = true;
11998 continue;
11999 }
12000
12001 CXXCastPath BasePath;
12002 BasePath.push_back(&Base);
12003
12004 // Construct the "from" expression, which is an implicit cast to the
12005 // appropriately-qualified base type.
12006 CastBuilder From(OtherRef, Context.getQualifiedType(BaseType, OtherQuals),
12007 VK_LValue, BasePath);
12008
12009 // Dereference "this".
12010 DerefBuilder DerefThis(This);
12011 CastBuilder To(DerefThis,
12012 Context.getQualifiedType(
12013 BaseType, CopyAssignOperator->getTypeQualifiers()),
12014 VK_LValue, BasePath);
12015
12016 // Build the copy.
12017 StmtResult Copy = buildSingleCopyAssign(*this, Loc, BaseType,
12018 To, From,
12019 /*CopyingBaseSubobject=*/true,
12020 /*Copying=*/true);
12021 if (Copy.isInvalid()) {
12022 CopyAssignOperator->setInvalidDecl();
12023 return;
12024 }
12025
12026 // Success! Record the copy.
12027 Statements.push_back(Copy.getAs<Expr>());
12028 }
12029
12030 // Assign non-static members.
12031 for (auto *Field : ClassDecl->fields()) {
12032 // FIXME: We should form some kind of AST representation for the implied
12033 // memcpy in a union copy operation.
12034 if (Field->isUnnamedBitfield() || Field->getParent()->isUnion())
12035 continue;
12036
12037 if (Field->isInvalidDecl()) {
12038 Invalid = true;
12039 continue;
12040 }
12041
12042 // Check for members of reference type; we can't copy those.
12043 if (Field->getType()->isReferenceType()) {
12044 Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign)
12045 << Context.getTagDeclType(ClassDecl) << 0 << Field->getDeclName();
12046 Diag(Field->getLocation(), diag::note_declared_at);
12047 Invalid = true;
12048 continue;
12049 }
12050
12051 // Check for members of const-qualified, non-class type.
12052 QualType BaseType = Context.getBaseElementType(Field->getType());
12053 if (!BaseType->getAs<RecordType>() && BaseType.isConstQualified()) {
12054 Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign)
12055 << Context.getTagDeclType(ClassDecl) << 1 << Field->getDeclName();
12056 Diag(Field->getLocation(), diag::note_declared_at);
12057 Invalid = true;
12058 continue;
12059 }
12060
12061 // Suppress assigning zero-width bitfields.
12062 if (Field->isZeroLengthBitField(Context))
12063 continue;
12064
12065 QualType FieldType = Field->getType().getNonReferenceType();
12066 if (FieldType->isIncompleteArrayType()) {
12067 assert(ClassDecl->hasFlexibleArrayMember() &&
12068 "Incomplete array type is not valid");
12069 continue;
12070 }
12071
12072 // Build references to the field in the object we're copying from and to.
12073 CXXScopeSpec SS; // Intentionally empty
12074 LookupResult MemberLookup(*this, Field->getDeclName(), Loc,
12075 LookupMemberName);
12076 MemberLookup.addDecl(Field);
12077 MemberLookup.resolveKind();
12078
12079 MemberBuilder From(OtherRef, OtherRefType, /*IsArrow=*/false, MemberLookup);
12080
12081 MemberBuilder To(This, getCurrentThisType(), /*IsArrow=*/true, MemberLookup);
12082
12083 // Build the copy of this field.
12084 StmtResult Copy = buildSingleCopyAssign(*this, Loc, FieldType,
12085 To, From,
12086 /*CopyingBaseSubobject=*/false,
12087 /*Copying=*/true);
12088 if (Copy.isInvalid()) {
12089 CopyAssignOperator->setInvalidDecl();
12090 return;
12091 }
12092
12093 // Success! Record the copy.
12094 Statements.push_back(Copy.getAs<Stmt>());
12095 }
12096
12097 if (!Invalid) {
12098 // Add a "return *this;"
12099 ExprResult ThisObj = CreateBuiltinUnaryOp(Loc, UO_Deref, This.build(*this, Loc));
12100
12101 StmtResult Return = BuildReturnStmt(Loc, ThisObj.get());
12102 if (Return.isInvalid())
12103 Invalid = true;
12104 else
12105 Statements.push_back(Return.getAs<Stmt>());
12106 }
12107
12108 if (Invalid) {
12109 CopyAssignOperator->setInvalidDecl();
12110 return;
12111 }
12112
12113 StmtResult Body;
12114 {
12115 CompoundScopeRAII CompoundScope(*this);
12116 Body = ActOnCompoundStmt(Loc, Loc, Statements,
12117 /*isStmtExpr=*/false);
12118 assert(!Body.isInvalid() && "Compound statement creation cannot fail");
12119 }
12120 CopyAssignOperator->setBody(Body.getAs<Stmt>());
12121 CopyAssignOperator->markUsed(Context);
12122
12123 if (ASTMutationListener *L = getASTMutationListener()) {
12124 L->CompletedImplicitDefinition(CopyAssignOperator);
12125 }
12126 }
12127
12128 CXXMethodDecl *Sema::DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl) {
12129 assert(ClassDecl->needsImplicitMoveAssignment());
12130
12131 DeclaringSpecialMember DSM(*this, ClassDecl, CXXMoveAssignment);
12132 if (DSM.isAlreadyBeingDeclared())
12133 return nullptr;
12134
12135 // Note: The following rules are largely analoguous to the move
12136 // constructor rules.
12137
12138 QualType ArgType = Context.getTypeDeclType(ClassDecl);
12139 QualType RetType = Context.getLValueReferenceType(ArgType);
12140 ArgType = Context.getRValueReferenceType(ArgType);
12141
12142 bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl,
12143 CXXMoveAssignment,
12144 false);
12145
12146 // An implicitly-declared move assignment operator is an inline public
12147 // member of its class.
12148 DeclarationName Name = Context.DeclarationNames.getCXXOperatorName(OO_Equal);
12149 SourceLocation ClassLoc = ClassDecl->getLocation();
12150 DeclarationNameInfo NameInfo(Name, ClassLoc);
12151 CXXMethodDecl *MoveAssignment =
12152 CXXMethodDecl::Create(Context, ClassDecl, ClassLoc, NameInfo, QualType(),
12153 /*TInfo=*/nullptr, /*StorageClass=*/SC_None,
12154 /*isInline=*/true, Constexpr, SourceLocation());
12155 MoveAssignment->setAccess(AS_public);
12156 MoveAssignment->setDefaulted();
12157 MoveAssignment->setImplicit();
12158
12159 if (getLangOpts().CUDA) {
12160 inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXMoveAssignment,
12161 MoveAssignment,
12162 /* ConstRHS */ false,
12163 /* Diagnose */ false);
12164 }
12165
12166 // Build an exception specification pointing back at this member.
12167 FunctionProtoType::ExtProtoInfo EPI =
12168 getImplicitMethodEPI(*this, MoveAssignment);
12169 MoveAssignment->setType(Context.getFunctionType(RetType, ArgType, EPI));
12170
12171 // Add the parameter to the operator.
12172 ParmVarDecl *FromParam = ParmVarDecl::Create(Context, MoveAssignment,
12173 ClassLoc, ClassLoc,
12174 /*Id=*/nullptr, ArgType,
12175 /*TInfo=*/nullptr, SC_None,
12176 nullptr);
12177 MoveAssignment->setParams(FromParam);
12178
12179 MoveAssignment->setTrivial(
12180 ClassDecl->needsOverloadResolutionForMoveAssignment()
12181 ? SpecialMemberIsTrivial(MoveAssignment, CXXMoveAssignment)
12182 : ClassDecl->hasTrivialMoveAssignment());
12183
12184 // Note that we have added this copy-assignment operator.
12185 ++ASTContext::NumImplicitMoveAssignmentOperatorsDeclared;
12186
12187 Scope *S = getScopeForContext(ClassDecl);
12188 CheckImplicitSpecialMemberDeclaration(S, MoveAssignment);
12189
12190 if (ShouldDeleteSpecialMember(MoveAssignment, CXXMoveAssignment)) {
12191 ClassDecl->setImplicitMoveAssignmentIsDeleted();
12192 SetDeclDeleted(MoveAssignment, ClassLoc);
12193 }
12194
12195 if (S)
12196 PushOnScopeChains(MoveAssignment, S, false);
12197 ClassDecl->addDecl(MoveAssignment);
12198
12199 return MoveAssignment;
12200 }
12201
12202 /// Check if we're implicitly defining a move assignment operator for a class
12203 /// with virtual bases. Such a move assignment might move-assign the virtual
12204 /// base multiple times.
12205 static void checkMoveAssignmentForRepeatedMove(Sema &S, CXXRecordDecl *Class,
12206 SourceLocation CurrentLocation) {
12207 assert(!Class->isDependentContext() && "should not define dependent move");
12208
12209 // Only a virtual base could get implicitly move-assigned multiple times.
12210 // Only a non-trivial move assignment can observe this. We only want to
12211 // diagnose if we implicitly define an assignment operator that assigns
12212 // two base classes, both of which move-assign the same virtual base.
12213 if (Class->getNumVBases() == 0 || Class->hasTrivialMoveAssignment() ||
12214 Class->getNumBases() < 2)
12215 return;
12216
12217 llvm::SmallVector<CXXBaseSpecifier *, 16> Worklist;
12218 typedef llvm::DenseMap<CXXRecordDecl*, CXXBaseSpecifier*> VBaseMap;
12219 VBaseMap VBases;
12220
12221 for (auto &BI : Class->bases()) {
12222 Worklist.push_back(&BI);
12223 while (!Worklist.empty()) {
12224 CXXBaseSpecifier *BaseSpec = Worklist.pop_back_val();
12225 CXXRecordDecl *Base = BaseSpec->getType()->getAsCXXRecordDecl();
12226
12227 // If the base has no non-trivial move assignment operators,
12228 // we don't care about moves from it.
12229 if (!Base->hasNonTrivialMoveAssignment())
12230 continue;
12231
12232 // If there's nothing virtual here, skip it.
12233 if (!BaseSpec->isVirtual() && !Base->getNumVBases())
12234 continue;
12235
12236 // If we're not actually going to call a move assignment for this base,
12237 // or the selected move assignment is trivial, skip it.
12238 Sema::SpecialMemberOverloadResult SMOR =
12239 S.LookupSpecialMember(Base, Sema::CXXMoveAssignment,
12240 /*ConstArg*/false, /*VolatileArg*/false,
12241 /*RValueThis*/true, /*ConstThis*/false,
12242 /*VolatileThis*/false);
12243 if (!SMOR.getMethod() || SMOR.getMethod()->isTrivial() ||
12244 !SMOR.getMethod()->isMoveAssignmentOperator())
12245 continue;
12246
12247 if (BaseSpec->isVirtual()) {
12248 // We're going to move-assign this virtual base, and its move
12249 // assignment operator is not trivial. If this can happen for
12250 // multiple distinct direct bases of Class, diagnose it. (If it
12251 // only happens in one base, we'll diagnose it when synthesizing
12252 // that base class's move assignment operator.)
12253 CXXBaseSpecifier *&Existing =
12254 VBases.insert(std::make_pair(Base->getCanonicalDecl(), &BI))
12255 .first->second;
12256 if (Existing && Existing != &BI) {
12257 S.Diag(CurrentLocation, diag::warn_vbase_moved_multiple_times)
12258 << Class << Base;
12259 S.Diag(Existing->getBeginLoc(), diag::note_vbase_moved_here)
12260 << (Base->getCanonicalDecl() ==
12261 Existing->getType()->getAsCXXRecordDecl()->getCanonicalDecl())
12262 << Base << Existing->getType() << Existing->getSourceRange();
12263 S.Diag(BI.getBeginLoc(), diag::note_vbase_moved_here)
12264 << (Base->getCanonicalDecl() ==
12265 BI.getType()->getAsCXXRecordDecl()->getCanonicalDecl())
12266 << Base << BI.getType() << BaseSpec->getSourceRange();
12267
12268 // Only diagnose each vbase once.
12269 Existing = nullptr;
12270 }
12271 } else {
12272 // Only walk over bases that have defaulted move assignment operators.
12273 // We assume that any user-provided move assignment operator handles
12274 // the multiple-moves-of-vbase case itself somehow.
12275 if (!SMOR.getMethod()->isDefaulted())
12276 continue;
12277
12278 // We're going to move the base classes of Base. Add them to the list.
12279 for (auto &BI : Base->bases())
12280 Worklist.push_back(&BI);
12281 }
12282 }
12283 }
12284 }
12285
12286 void Sema::DefineImplicitMoveAssignment(SourceLocation CurrentLocation,
12287 CXXMethodDecl *MoveAssignOperator) {
12288 assert((MoveAssignOperator->isDefaulted() &&
12289 MoveAssignOperator->isOverloadedOperator() &&
12290 MoveAssignOperator->getOverloadedOperator() == OO_Equal &&
12291 !MoveAssignOperator->doesThisDeclarationHaveABody() &&
12292 !MoveAssignOperator->isDeleted()) &&
12293 "DefineImplicitMoveAssignment called for wrong function");
12294 if (MoveAssignOperator->willHaveBody() || MoveAssignOperator->isInvalidDecl())
12295 return;
12296
12297 CXXRecordDecl *ClassDecl = MoveAssignOperator->getParent();
12298 if (ClassDecl->isInvalidDecl()) {
12299 MoveAssignOperator->setInvalidDecl();
12300 return;
12301 }
12302
12303 // C++0x [class.copy]p28:
12304 // The implicitly-defined or move assignment operator for a non-union class
12305 // X performs memberwise move assignment of its subobjects. The direct base
12306 // classes of X are assigned first, in the order of their declaration in the
12307 // base-specifier-list, and then the immediate non-static data members of X
12308 // are assigned, in the order in which they were declared in the class
12309 // definition.
12310
12311 // Issue a warning if our implicit move assignment operator will move
12312 // from a virtual base more than once.
12313 checkMoveAssignmentForRepeatedMove(*this, ClassDecl, CurrentLocation);
12314
12315 SynthesizedFunctionScope Scope(*this, MoveAssignOperator);
12316
12317 // The exception specification is needed because we are defining the
12318 // function.
12319 ResolveExceptionSpec(CurrentLocation,
12320 MoveAssignOperator->getType()->castAs<FunctionProtoType>());
12321
12322 // Add a context note for diagnostics produced after this point.
12323 Scope.addContextNote(CurrentLocation);
12324
12325 // The statements that form the synthesized function body.
12326 SmallVector<Stmt*, 8> Statements;
12327
12328 // The parameter for the "other" object, which we are move from.
12329 ParmVarDecl *Other = MoveAssignOperator->getParamDecl(0);
12330 QualType OtherRefType = Other->getType()->
12331 getAs<RValueReferenceType>()->getPointeeType();
12332
12333 // Our location for everything implicitly-generated.
12334 SourceLocation Loc = MoveAssignOperator->getEndLoc().isValid()
12335 ? MoveAssignOperator->getEndLoc()
12336 : MoveAssignOperator->getLocation();
12337
12338 // Builds a reference to the "other" object.
12339 RefBuilder OtherRef(Other, OtherRefType);
12340 // Cast to rvalue.
12341 MoveCastBuilder MoveOther(OtherRef);
12342
12343 // Builds the "this" pointer.
12344 ThisBuilder This;
12345
12346 // Assign base classes.
12347 bool Invalid = false;
12348 for (auto &Base : ClassDecl->bases()) {
12349 // C++11 [class.copy]p28:
12350 // It is unspecified whether subobjects representing virtual base classes
12351 // are assigned more than once by the implicitly-defined copy assignment
12352 // operator.
12353 // FIXME: Do not assign to a vbase that will be assigned by some other base
12354 // class. For a move-assignment, this can result in the vbase being moved
12355 // multiple times.
12356
12357 // Form the assignment:
12358 // static_cast<Base*>(this)->Base::operator=(static_cast<Base&&>(other));
12359 QualType BaseType = Base.getType().getUnqualifiedType();
12360 if (!BaseType->isRecordType()) {
12361 Invalid = true;
12362 continue;
12363 }
12364
12365 CXXCastPath BasePath;
12366 BasePath.push_back(&Base);
12367
12368 // Construct the "from" expression, which is an implicit cast to the
12369 // appropriately-qualified base type.
12370 CastBuilder From(OtherRef, BaseType, VK_XValue, BasePath);
12371
12372 // Dereference "this".
12373 DerefBuilder DerefThis(This);
12374
12375 // Implicitly cast "this" to the appropriately-qualified base type.
12376 CastBuilder To(DerefThis,
12377 Context.getQualifiedType(
12378 BaseType, MoveAssignOperator->getTypeQualifiers()),
12379 VK_LValue, BasePath);
12380
12381 // Build the move.
12382 StmtResult Move = buildSingleCopyAssign(*this, Loc, BaseType,
12383 To, From,
12384 /*CopyingBaseSubobject=*/true,
12385 /*Copying=*/false);
12386 if (Move.isInvalid()) {
12387 MoveAssignOperator->setInvalidDecl();
12388 return;
12389 }
12390
12391 // Success! Record the move.
12392 Statements.push_back(Move.getAs<Expr>());
12393 }
12394
12395 // Assign non-static members.
12396 for (auto *Field : ClassDecl->fields()) {
12397 // FIXME: We should form some kind of AST representation for the implied
12398 // memcpy in a union copy operation.
12399 if (Field->isUnnamedBitfield() || Field->getParent()->isUnion())
12400 continue;
12401
12402 if (Field->isInvalidDecl()) {
12403 Invalid = true;
12404 continue;
12405 }
12406
12407 // Check for members of reference type; we can't move those.
12408 if (Field->getType()->isReferenceType()) {
12409 Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign)
12410 << Context.getTagDeclType(ClassDecl) << 0 << Field->getDeclName();
12411 Diag(Field->getLocation(), diag::note_declared_at);
12412 Invalid = true;
12413 continue;
12414 }
12415
12416 // Check for members of const-qualified, non-class type.
12417 QualType BaseType = Context.getBaseElementType(Field->getType());
12418 if (!BaseType->getAs<RecordType>() && BaseType.isConstQualified()) {
12419 Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign)
12420 << Context.getTagDeclType(ClassDecl) << 1 << Field->getDeclName();
12421 Diag(Field->getLocation(), diag::note_declared_at);
12422 Invalid = true;
12423 continue;
12424 }
12425
12426 // Suppress assigning zero-width bitfields.
12427 if (Field->isZeroLengthBitField(Context))
12428 continue;
12429
12430 QualType FieldType = Field->getType().getNonReferenceType();
12431 if (FieldType->isIncompleteArrayType()) {
12432 assert(ClassDecl->hasFlexibleArrayMember() &&
12433 "Incomplete array type is not valid");
12434 continue;
12435 }
12436
12437 // Build references to the field in the object we're copying from and to.
12438 LookupResult MemberLookup(*this, Field->getDeclName(), Loc,
12439 LookupMemberName);
12440 MemberLookup.addDecl(Field);
12441 MemberLookup.resolveKind();
12442 MemberBuilder From(MoveOther, OtherRefType,
12443 /*IsArrow=*/false, MemberLookup);
12444 MemberBuilder To(This, getCurrentThisType(),
12445 /*IsArrow=*/true, MemberLookup);
12446
12447 assert(!From.build(*this, Loc)->isLValue() && // could be xvalue or prvalue
12448 "Member reference with rvalue base must be rvalue except for reference "
12449 "members, which aren't allowed for move assignment.");
12450
12451 // Build the move of this field.
12452 StmtResult Move = buildSingleCopyAssign(*this, Loc, FieldType,
12453 To, From,
12454 /*CopyingBaseSubobject=*/false,
12455 /*Copying=*/false);
12456 if (Move.isInvalid()) {
12457 MoveAssignOperator->setInvalidDecl();
12458 return;
12459 }
12460
12461 // Success! Record the copy.
12462 Statements.push_back(Move.getAs<Stmt>());
12463 }
12464
12465 if (!Invalid) {
12466 // Add a "return *this;"
12467 ExprResult ThisObj =
12468 CreateBuiltinUnaryOp(Loc, UO_Deref, This.build(*this, Loc));
12469
12470 StmtResult Return = BuildReturnStmt(Loc, ThisObj.get());
12471 if (Return.isInvalid())
12472 Invalid = true;
12473 else
12474 Statements.push_back(Return.getAs<Stmt>());
12475 }
12476
12477 if (Invalid) {
12478 MoveAssignOperator->setInvalidDecl();
12479 return;
12480 }
12481
12482 StmtResult Body;
12483 {
12484 CompoundScopeRAII CompoundScope(*this);
12485 Body = ActOnCompoundStmt(Loc, Loc, Statements,
12486 /*isStmtExpr=*/false);
12487 assert(!Body.isInvalid() && "Compound statement creation cannot fail");
12488 }
12489 MoveAssignOperator->setBody(Body.getAs<Stmt>());
12490 MoveAssignOperator->markUsed(Context);
12491
12492 if (ASTMutationListener *L = getASTMutationListener()) {
12493 L->CompletedImplicitDefinition(MoveAssignOperator);
12494 }
12495 }
12496
12497 CXXConstructorDecl *Sema::DeclareImplicitCopyConstructor(
12498 CXXRecordDecl *ClassDecl) {
12499 // C++ [class.copy]p4:
12500 // If the class definition does not explicitly declare a copy
12501 // constructor, one is declared implicitly.
12502 assert(ClassDecl->needsImplicitCopyConstructor());
12503
12504 DeclaringSpecialMember DSM(*this, ClassDecl, CXXCopyConstructor);
12505 if (DSM.isAlreadyBeingDeclared())
12506 return nullptr;
12507
12508 QualType ClassType = Context.getTypeDeclType(ClassDecl);
12509 QualType ArgType = ClassType;
12510 bool Const = ClassDecl->implicitCopyConstructorHasConstParam();
12511 if (Const)
12512 ArgType = ArgType.withConst();
12513
12514 if (Context.getLangOpts().OpenCLCPlusPlus)
12515 ArgType = Context.getAddrSpaceQualType(ArgType, LangAS::opencl_generic);
12516
12517 ArgType = Context.getLValueReferenceType(ArgType);
12518
12519 bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl,
12520 CXXCopyConstructor,
12521 Const);
12522
12523 DeclarationName Name
12524 = Context.DeclarationNames.getCXXConstructorName(
12525 Context.getCanonicalType(ClassType));
12526 SourceLocation ClassLoc = ClassDecl->getLocation();
12527 DeclarationNameInfo NameInfo(Name, ClassLoc);
12528
12529 // An implicitly-declared copy constructor is an inline public
12530 // member of its class.
12531 CXXConstructorDecl *CopyConstructor = CXXConstructorDecl::Create(
12532 Context, ClassDecl, ClassLoc, NameInfo, QualType(), /*TInfo=*/nullptr,
12533 /*isExplicit=*/false, /*isInline=*/true, /*isImplicitlyDeclared=*/true,
12534 Constexpr);
12535 CopyConstructor->setAccess(AS_public);
12536 CopyConstructor->setDefaulted();
12537
12538 if (getLangOpts().CUDA) {
12539 inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXCopyConstructor,
12540 CopyConstructor,
12541 /* ConstRHS */ Const,
12542 /* Diagnose */ false);
12543 }
12544
12545 setupImplicitSpecialMemberType(CopyConstructor, Context.VoidTy, ArgType);
12546
12547 // Add the parameter to the constructor.
12548 ParmVarDecl *FromParam = ParmVarDecl::Create(Context, CopyConstructor,
12549 ClassLoc, ClassLoc,
12550 /*IdentifierInfo=*/nullptr,
12551 ArgType, /*TInfo=*/nullptr,
12552 SC_None, nullptr);
12553 CopyConstructor->setParams(FromParam);
12554
12555 CopyConstructor->setTrivial(
12556 ClassDecl->needsOverloadResolutionForCopyConstructor()
12557 ? SpecialMemberIsTrivial(CopyConstructor, CXXCopyConstructor)
12558 : ClassDecl->hasTrivialCopyConstructor());
12559
12560 CopyConstructor->setTrivialForCall(
12561 ClassDecl->hasAttr<TrivialABIAttr>() ||
12562 (ClassDecl->needsOverloadResolutionForCopyConstructor()
12563 ? SpecialMemberIsTrivial(CopyConstructor, CXXCopyConstructor,
12564 TAH_ConsiderTrivialABI)
12565 : ClassDecl->hasTrivialCopyConstructorForCall()));
12566
12567 // Note that we have declared this constructor.
12568 ++ASTContext::NumImplicitCopyConstructorsDeclared;
12569
12570 Scope *S = getScopeForContext(ClassDecl);
12571 CheckImplicitSpecialMemberDeclaration(S, CopyConstructor);
12572
12573 if (ShouldDeleteSpecialMember(CopyConstructor, CXXCopyConstructor)) {
12574 ClassDecl->setImplicitCopyConstructorIsDeleted();
12575 SetDeclDeleted(CopyConstructor, ClassLoc);
12576 }
12577
12578 if (S)
12579 PushOnScopeChains(CopyConstructor, S, false);
12580 ClassDecl->addDecl(CopyConstructor);
12581
12582 return CopyConstructor;
12583 }
12584
12585 void Sema::DefineImplicitCopyConstructor(SourceLocation CurrentLocation,
12586 CXXConstructorDecl *CopyConstructor) {
12587 assert((CopyConstructor->isDefaulted() &&
12588 CopyConstructor->isCopyConstructor() &&
12589 !CopyConstructor->doesThisDeclarationHaveABody() &&
12590 !CopyConstructor->isDeleted()) &&
12591 "DefineImplicitCopyConstructor - call it for implicit copy ctor");
12592 if (CopyConstructor->willHaveBody() || CopyConstructor->isInvalidDecl())
12593 return;
12594
12595 CXXRecordDecl *ClassDecl = CopyConstructor->getParent();
12596 assert(ClassDecl && "DefineImplicitCopyConstructor - invalid constructor");
12597
12598 SynthesizedFunctionScope Scope(*this, CopyConstructor);
12599
12600 // The exception specification is needed because we are defining the
12601 // function.
12602 ResolveExceptionSpec(CurrentLocation,
12603 CopyConstructor->getType()->castAs<FunctionProtoType>());
12604 MarkVTableUsed(CurrentLocation, ClassDecl);
12605
12606 // Add a context note for diagnostics produced after this point.
12607 Scope.addContextNote(CurrentLocation);
12608
12609 // C++11 [class.copy]p7:
12610 // The [definition of an implicitly declared copy constructor] is
12611 // deprecated if the class has a user-declared copy assignment operator
12612 // or a user-declared destructor.
12613 if (getLangOpts().CPlusPlus11 && CopyConstructor->isImplicit())
12614 diagnoseDeprecatedCopyOperation(*this, CopyConstructor);
12615
12616 if (SetCtorInitializers(CopyConstructor, /*AnyErrors=*/false)) {
12617 CopyConstructor->setInvalidDecl();
12618 } else {
12619 SourceLocation Loc = CopyConstructor->getEndLoc().isValid()
12620 ? CopyConstructor->getEndLoc()
12621 : CopyConstructor->getLocation();
12622 Sema::CompoundScopeRAII CompoundScope(*this);
12623 CopyConstructor->setBody(
12624 ActOnCompoundStmt(Loc, Loc, None, /*isStmtExpr=*/false).getAs<Stmt>());
12625 CopyConstructor->markUsed(Context);
12626 }
12627
12628 if (ASTMutationListener *L = getASTMutationListener()) {
12629 L->CompletedImplicitDefinition(CopyConstructor);
12630 }
12631 }
12632
12633 CXXConstructorDecl *Sema::DeclareImplicitMoveConstructor(
12634 CXXRecordDecl *ClassDecl) {
12635 assert(ClassDecl->needsImplicitMoveConstructor());
12636
12637 DeclaringSpecialMember DSM(*this, ClassDecl, CXXMoveConstructor);
12638 if (DSM.isAlreadyBeingDeclared())
12639 return nullptr;
12640
12641 QualType ClassType = Context.getTypeDeclType(ClassDecl);
12642
12643 QualType ArgType = ClassType;
12644 if (Context.getLangOpts().OpenCLCPlusPlus)
12645 ArgType = Context.getAddrSpaceQualType(ClassType, LangAS::opencl_generic);
12646 ArgType = Context.getRValueReferenceType(ArgType);
12647
12648 bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl,
12649 CXXMoveConstructor,
12650 false);
12651
12652 DeclarationName Name
12653 = Context.DeclarationNames.getCXXConstructorName(
12654 Context.getCanonicalType(ClassType));
12655 SourceLocation ClassLoc = ClassDecl->getLocation();
12656 DeclarationNameInfo NameInfo(Name, ClassLoc);
12657
12658 // C++11 [class.copy]p11:
12659 // An implicitly-declared copy/move constructor is an inline public
12660 // member of its class.
12661 CXXConstructorDecl *MoveConstructor = CXXConstructorDecl::Create(
12662 Context, ClassDecl, ClassLoc, NameInfo, QualType(), /*TInfo=*/nullptr,
12663 /*isExplicit=*/false, /*isInline=*/true, /*isImplicitlyDeclared=*/true,
12664 Constexpr);
12665 MoveConstructor->setAccess(AS_public);
12666 MoveConstructor->setDefaulted();
12667
12668 if (getLangOpts().CUDA) {
12669 inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXMoveConstructor,
12670 MoveConstructor,
12671 /* ConstRHS */ false,
12672 /* Diagnose */ false);
12673 }
12674
12675 setupImplicitSpecialMemberType(MoveConstructor, Context.VoidTy, ArgType);
12676
12677 // Add the parameter to the constructor.
12678 ParmVarDecl *FromParam = ParmVarDecl::Create(Context, MoveConstructor,
12679 ClassLoc, ClassLoc,
12680 /*IdentifierInfo=*/nullptr,
12681 ArgType, /*TInfo=*/nullptr,
12682 SC_None, nullptr);
12683 MoveConstructor->setParams(FromParam);
12684
12685 MoveConstructor->setTrivial(
12686 ClassDecl->needsOverloadResolutionForMoveConstructor()
12687 ? SpecialMemberIsTrivial(MoveConstructor, CXXMoveConstructor)
12688 : ClassDecl->hasTrivialMoveConstructor());
12689
12690 MoveConstructor->setTrivialForCall(
12691 ClassDecl->hasAttr<TrivialABIAttr>() ||
12692 (ClassDecl->needsOverloadResolutionForMoveConstructor()
12693 ? SpecialMemberIsTrivial(MoveConstructor, CXXMoveConstructor,
12694 TAH_ConsiderTrivialABI)
12695 : ClassDecl->hasTrivialMoveConstructorForCall()));
12696
12697 // Note that we have declared this constructor.
12698 ++ASTContext::NumImplicitMoveConstructorsDeclared;
12699
12700 Scope *S = getScopeForContext(ClassDecl);
12701 CheckImplicitSpecialMemberDeclaration(S, MoveConstructor);
12702
12703 if (ShouldDeleteSpecialMember(MoveConstructor, CXXMoveConstructor)) {
12704 ClassDecl->setImplicitMoveConstructorIsDeleted();
12705 SetDeclDeleted(MoveConstructor, ClassLoc);
12706 }
12707
12708 if (S)
12709 PushOnScopeChains(MoveConstructor, S, false);
12710 ClassDecl->addDecl(MoveConstructor);
12711
12712 return MoveConstructor;
12713 }
12714
12715 void Sema::DefineImplicitMoveConstructor(SourceLocation CurrentLocation,
12716 CXXConstructorDecl *MoveConstructor) {
12717 assert((MoveConstructor->isDefaulted() &&
12718 MoveConstructor->isMoveConstructor() &&
12719 !MoveConstructor->doesThisDeclarationHaveABody() &&
12720 !MoveConstructor->isDeleted()) &&
12721 "DefineImplicitMoveConstructor - call it for implicit move ctor");
12722 if (MoveConstructor->willHaveBody() || MoveConstructor->isInvalidDecl())
12723 return;
12724
12725 CXXRecordDecl *ClassDecl = MoveConstructor->getParent();
12726 assert(ClassDecl && "DefineImplicitMoveConstructor - invalid constructor");
12727
12728 SynthesizedFunctionScope Scope(*this, MoveConstructor);
12729
12730 // The exception specification is needed because we are defining the
12731 // function.
12732 ResolveExceptionSpec(CurrentLocation,
12733 MoveConstructor->getType()->castAs<FunctionProtoType>());
12734 MarkVTableUsed(CurrentLocation, ClassDecl);
12735
12736 // Add a context note for diagnostics produced after this point.
12737 Scope.addContextNote(CurrentLocation);
12738
12739 if (SetCtorInitializers(MoveConstructor, /*AnyErrors=*/false)) {
12740 MoveConstructor->setInvalidDecl();
12741 } else {
12742 SourceLocation Loc = MoveConstructor->getEndLoc().isValid()
12743 ? MoveConstructor->getEndLoc()
12744 : MoveConstructor->getLocation();
12745 Sema::CompoundScopeRAII CompoundScope(*this);
12746 MoveConstructor->setBody(ActOnCompoundStmt(
12747 Loc, Loc, None, /*isStmtExpr=*/ false).getAs<Stmt>());
12748 MoveConstructor->markUsed(Context);
12749 }
12750
12751 if (ASTMutationListener *L = getASTMutationListener()) {
12752 L->CompletedImplicitDefinition(MoveConstructor);
12753 }
12754 }
12755
12756 bool Sema::isImplicitlyDeleted(FunctionDecl *FD) {
12757 return FD->isDeleted() && FD->isDefaulted() && isa<CXXMethodDecl>(FD);
12758 }
12759
12760 void Sema::DefineImplicitLambdaToFunctionPointerConversion(
12761 SourceLocation CurrentLocation,
12762 CXXConversionDecl *Conv) {
12763 SynthesizedFunctionScope Scope(*this, Conv);
12764 assert(!Conv->getReturnType()->isUndeducedType());
12765
12766 CXXRecordDecl *Lambda = Conv->getParent();
12767 FunctionDecl *CallOp = Lambda->getLambdaCallOperator();
12768 FunctionDecl *Invoker = Lambda->getLambdaStaticInvoker();
12769
12770 if (auto *TemplateArgs = Conv->getTemplateSpecializationArgs()) {
12771 CallOp = InstantiateFunctionDeclaration(
12772 CallOp->getDescribedFunctionTemplate(), TemplateArgs, CurrentLocation);
12773 if (!CallOp)
12774 return;
12775
12776 Invoker = InstantiateFunctionDeclaration(
12777 Invoker->getDescribedFunctionTemplate(), TemplateArgs, CurrentLocation);
12778 if (!Invoker)
12779 return;
12780 }
12781
12782 if (CallOp->isInvalidDecl())
12783 return;
12784
12785 // Mark the call operator referenced (and add to pending instantiations
12786 // if necessary).
12787 // For both the conversion and static-invoker template specializations
12788 // we construct their body's in this function, so no need to add them
12789 // to the PendingInstantiations.
12790 MarkFunctionReferenced(CurrentLocation, CallOp);
12791
12792 // Fill in the __invoke function with a dummy implementation. IR generation
12793 // will fill in the actual details. Update its type in case it contained
12794 // an 'auto'.
12795 Invoker->markUsed(Context);
12796 Invoker->setReferenced();
12797 Invoker->setType(Conv->getReturnType()->getPointeeType());
12798 Invoker->setBody(new (Context) CompoundStmt(Conv->getLocation()));
12799
12800 // Construct the body of the conversion function { return __invoke; }.
12801 Expr *FunctionRef = BuildDeclRefExpr(Invoker, Invoker->getType(),
12802 VK_LValue, Conv->getLocation()).get();
12803 assert(FunctionRef && "Can't refer to __invoke function?");
12804 Stmt *Return = BuildReturnStmt(Conv->getLocation(), FunctionRef).get();
12805 Conv->setBody(CompoundStmt::Create(Context, Return, Conv->getLocation(),
12806 Conv->getLocation()));
12807 Conv->markUsed(Context);
12808 Conv->setReferenced();
12809
12810 if (ASTMutationListener *L = getASTMutationListener()) {
12811 L->CompletedImplicitDefinition(Conv);
12812 L->CompletedImplicitDefinition(Invoker);
12813 }
12814 }
12815
12816
12817
12818 void Sema::DefineImplicitLambdaToBlockPointerConversion(
12819 SourceLocation CurrentLocation,
12820 CXXConversionDecl *Conv)
12821 {
12822 assert(!Conv->getParent()->isGenericLambda());
12823
12824 SynthesizedFunctionScope Scope(*this, Conv);
12825
12826 // Copy-initialize the lambda object as needed to capture it.
12827 Expr *This = ActOnCXXThis(CurrentLocation).get();
12828 Expr *DerefThis =CreateBuiltinUnaryOp(CurrentLocation, UO_Deref, This).get();
12829
12830 ExprResult BuildBlock = BuildBlockForLambdaConversion(CurrentLocation,
12831 Conv->getLocation(),
12832 Conv, DerefThis);
12833
12834 // If we're not under ARC, make sure we still get the _Block_copy/autorelease
12835 // behavior. Note that only the general conversion function does this
12836 // (since it's unusable otherwise); in the case where we inline the
12837 // block literal, it has block literal lifetime semantics.
12838 if (!BuildBlock.isInvalid() && !getLangOpts().ObjCAutoRefCount)
12839 BuildBlock = ImplicitCastExpr::Create(Context, BuildBlock.get()->getType(),
12840 CK_CopyAndAutoreleaseBlockObject,
12841 BuildBlock.get(), nullptr, VK_RValue);
12842
12843 if (BuildBlock.isInvalid()) {
12844 Diag(CurrentLocation, diag::note_lambda_to_block_conv);
12845 Conv->setInvalidDecl();
12846 return;
12847 }
12848
12849 // Create the return statement that returns the block from the conversion
12850 // function.
12851 StmtResult Return = BuildReturnStmt(Conv->getLocation(), BuildBlock.get());
12852 if (Return.isInvalid()) {
12853 Diag(CurrentLocation, diag::note_lambda_to_block_conv);
12854 Conv->setInvalidDecl();
12855 return;
12856 }
12857
12858 // Set the body of the conversion function.
12859 Stmt *ReturnS = Return.get();
12860 Conv->setBody(CompoundStmt::Create(Context, ReturnS, Conv->getLocation(),
12861 Conv->getLocation()));
12862 Conv->markUsed(Context);
12863
12864 // We're done; notify the mutation listener, if any.
12865 if (ASTMutationListener *L = getASTMutationListener()) {
12866 L->CompletedImplicitDefinition(Conv);
12867 }
12868 }
12869
12870 /// Determine whether the given list arguments contains exactly one
12871 /// "real" (non-default) argument.
12872 static bool hasOneRealArgument(MultiExprArg Args) {
12873 switch (Args.size()) {
12874 case 0:
12875 return false;
12876
12877 default:
12878 if (!Args[1]->isDefaultArgument())
12879 return false;
12880
12881 LLVM_FALLTHROUGH;
12882 case 1:
12883 return !Args[0]->isDefaultArgument();
12884 }
12885
12886 return false;
12887 }
12888
12889 ExprResult
12890 Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
12891 NamedDecl *FoundDecl,
12892 CXXConstructorDecl *Constructor,
12893 MultiExprArg ExprArgs,
12894 bool HadMultipleCandidates,
12895 bool IsListInitialization,
12896 bool IsStdInitListInitialization,
12897 bool RequiresZeroInit,
12898 unsigned ConstructKind,
12899 SourceRange ParenRange) {
12900 bool Elidable = false;
12901
12902 // C++0x [class.copy]p34:
12903 // When certain criteria are met, an implementation is allowed to
12904 // omit the copy/move construction of a class object, even if the
12905 // copy/move constructor and/or destructor for the object have
12906 // side effects. [...]
12907 // - when a temporary class object that has not been bound to a
12908 // reference (12.2) would be copied/moved to a class object
12909 // with the same cv-unqualified type, the copy/move operation
12910 // can be omitted by constructing the temporary object
12911 // directly into the target of the omitted copy/move
12912 if (ConstructKind == CXXConstructExpr::CK_Complete && Constructor &&
12913 Constructor->isCopyOrMoveConstructor() && hasOneRealArgument(ExprArgs)) {
12914 Expr *SubExpr = ExprArgs[0];
12915 Elidable = SubExpr->isTemporaryObject(
12916 Context, cast<CXXRecordDecl>(FoundDecl->getDeclContext()));
12917 }
12918
12919 return BuildCXXConstructExpr(ConstructLoc, DeclInitType,
12920 FoundDecl, Constructor,
12921 Elidable, ExprArgs, HadMultipleCandidates,
12922 IsListInitialization,
12923 IsStdInitListInitialization, RequiresZeroInit,
12924 ConstructKind, ParenRange);
12925 }
12926
12927 ExprResult
12928 Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
12929 NamedDecl *FoundDecl,
12930 CXXConstructorDecl *Constructor,
12931 bool Elidable,
12932 MultiExprArg ExprArgs,
12933 bool HadMultipleCandidates,
12934 bool IsListInitialization,
12935 bool IsStdInitListInitialization,
12936 bool RequiresZeroInit,
12937 unsigned ConstructKind,
12938 SourceRange ParenRange) {
12939 if (auto *Shadow = dyn_cast<ConstructorUsingShadowDecl>(FoundDecl)) {
12940 Constructor = findInheritingConstructor(ConstructLoc, Constructor, Shadow);
12941 if (DiagnoseUseOfDecl(Constructor, ConstructLoc))
12942 return ExprError();
12943 }
12944
12945 return BuildCXXConstructExpr(
12946 ConstructLoc, DeclInitType, Constructor, Elidable, ExprArgs,
12947 HadMultipleCandidates, IsListInitialization, IsStdInitListInitialization,
12948 RequiresZeroInit, ConstructKind, ParenRange);
12949 }
12950
12951 /// BuildCXXConstructExpr - Creates a complete call to a constructor,
12952 /// including handling of its default argument expressions.
12953 ExprResult
12954 Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
12955 CXXConstructorDecl *Constructor,
12956 bool Elidable,
12957 MultiExprArg ExprArgs,
12958 bool HadMultipleCandidates,
12959 bool IsListInitialization,
12960 bool IsStdInitListInitialization,
12961 bool RequiresZeroInit,
12962 unsigned ConstructKind,
12963 SourceRange ParenRange) {
12964 assert(declaresSameEntity(
12965 Constructor->getParent(),
12966 DeclInitType->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) &&
12967 "given constructor for wrong type");
12968 MarkFunctionReferenced(ConstructLoc, Constructor);
12969 if (getLangOpts().CUDA && !CheckCUDACall(ConstructLoc, Constructor))
12970 return ExprError();
12971
12972 return CXXConstructExpr::Create(
12973 Context, DeclInitType, ConstructLoc, Constructor, Elidable,
12974 ExprArgs, HadMultipleCandidates, IsListInitialization,
12975 IsStdInitListInitialization, RequiresZeroInit,
12976 static_cast<CXXConstructExpr::ConstructionKind>(ConstructKind),
12977 ParenRange);
12978 }
12979
12980 ExprResult Sema::BuildCXXDefaultInitExpr(SourceLocation Loc, FieldDecl *Field) {
12981 assert(Field->hasInClassInitializer());
12982
12983 // If we already have the in-class initializer nothing needs to be done.
12984 if (Field->getInClassInitializer())
12985 return CXXDefaultInitExpr::Create(Context, Loc, Field);
12986
12987 // If we might have already tried and failed to instantiate, don't try again.
12988 if (Field->isInvalidDecl())
12989 return ExprError();
12990
12991 // Maybe we haven't instantiated the in-class initializer. Go check the
12992 // pattern FieldDecl to see if it has one.
12993 CXXRecordDecl *ParentRD = cast<CXXRecordDecl>(Field->getParent());
12994
12995 if (isTemplateInstantiation(ParentRD->getTemplateSpecializationKind())) {
12996 CXXRecordDecl *ClassPattern = ParentRD->getTemplateInstantiationPattern();
12997 DeclContext::lookup_result Lookup =
12998 ClassPattern->lookup(Field->getDeclName());
12999
13000 // Lookup can return at most two results: the pattern for the field, or the
13001 // injected class name of the parent record. No other member can have the
13002 // same name as the field.
13003 // In modules mode, lookup can return multiple results (coming from
13004 // different modules).
13005 assert((getLangOpts().Modules || (!Lookup.empty() && Lookup.size() <= 2)) &&
13006 "more than two lookup results for field name");
13007 FieldDecl *Pattern = dyn_cast<FieldDecl>(Lookup[0]);
13008 if (!Pattern) {
13009 assert(isa<CXXRecordDecl>(Lookup[0]) &&
13010 "cannot have other non-field member with same name");
13011 for (auto L : Lookup)
13012 if (isa<FieldDecl>(L)) {
13013 Pattern = cast<FieldDecl>(L);
13014 break;
13015 }
13016 assert(Pattern && "We must have set the Pattern!");
13017 }
13018
13019 if (!Pattern->hasInClassInitializer() ||
13020 InstantiateInClassInitializer(Loc, Field, Pattern,
13021 getTemplateInstantiationArgs(Field))) {
13022 // Don't diagnose this again.
13023 Field->setInvalidDecl();
13024 return ExprError();
13025 }
13026 return CXXDefaultInitExpr::Create(Context, Loc, Field);
13027 }
13028
13029 // DR1351:
13030 // If the brace-or-equal-initializer of a non-static data member
13031 // invokes a defaulted default constructor of its class or of an
13032 // enclosing class in a potentially evaluated subexpression, the
13033 // program is ill-formed.
13034 //
13035 // This resolution is unworkable: the exception specification of the
13036 // default constructor can be needed in an unevaluated context, in
13037 // particular, in the operand of a noexcept-expression, and we can be
13038 // unable to compute an exception specification for an enclosed class.
13039 //
13040 // Any attempt to resolve the exception specification of a defaulted default
13041 // constructor before the initializer is lexically complete will ultimately
13042 // come here at which point we can diagnose it.
13043 RecordDecl *OutermostClass = ParentRD->getOuterLexicalRecordContext();
13044 Diag(Loc, diag::err_in_class_initializer_not_yet_parsed)
13045 << OutermostClass << Field;
13046 Diag(Field->getEndLoc(), diag::note_in_class_initializer_not_yet_parsed);
13047 // Recover by marking the field invalid, unless we're in a SFINAE context.
13048 if (!isSFINAEContext())
13049 Field->setInvalidDecl();
13050 return ExprError();
13051 }
13052
13053 void Sema::FinalizeVarWithDestructor(VarDecl *VD, const RecordType *Record) {
13054 if (VD->isInvalidDecl()) return;
13055
13056 CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(Record->getDecl());
13057 if (ClassDecl->isInvalidDecl()) return;
13058 if (ClassDecl->hasIrrelevantDestructor()) return;
13059 if (ClassDecl->isDependentContext()) return;
13060
13061 if (VD->isNoDestroy(getASTContext()))
13062 return;
13063
13064 CXXDestructorDecl *Destructor = LookupDestructor(ClassDecl);
13065 MarkFunctionReferenced(VD->getLocation(), Destructor);
13066 CheckDestructorAccess(VD->getLocation(), Destructor,
13067 PDiag(diag::err_access_dtor_var)
13068 << VD->getDeclName()
13069 << VD->getType());
13070 DiagnoseUseOfDecl(Destructor, VD->getLocation());
13071
13072 if (Destructor->isTrivial()) return;
13073 if (!VD->hasGlobalStorage()) return;
13074
13075 // Emit warning for non-trivial dtor in global scope (a real global,
13076 // class-static, function-static).
13077 Diag(VD->getLocation(), diag::warn_exit_time_destructor);
13078
13079 // TODO: this should be re-enabled for static locals by !CXAAtExit
13080 if (!VD->isStaticLocal())
13081 Diag(VD->getLocation(), diag::warn_global_destructor);
13082 }
13083
13084 /// Given a constructor and the set of arguments provided for the
13085 /// constructor, convert the arguments and add any required default arguments
13086 /// to form a proper call to this constructor.
13087 ///
13088 /// \returns true if an error occurred, false otherwise.
13089 bool
13090 Sema::CompleteConstructorCall(CXXConstructorDecl *Constructor,
13091 MultiExprArg ArgsPtr,
13092 SourceLocation Loc,
13093 SmallVectorImpl<Expr*> &ConvertedArgs,
13094 bool AllowExplicit,
13095 bool IsListInitialization) {
13096 // FIXME: This duplicates a lot of code from Sema::ConvertArgumentsForCall.
13097 unsigned NumArgs = ArgsPtr.size();
13098 Expr **Args = ArgsPtr.data();
13099
13100 const FunctionProtoType *Proto
13101 = Constructor->getType()->getAs<FunctionProtoType>();
13102 assert(Proto && "Constructor without a prototype?");
13103 unsigned NumParams = Proto->getNumParams();
13104
13105 // If too few arguments are available, we'll fill in the rest with defaults.
13106 if (NumArgs < NumParams)
13107 ConvertedArgs.reserve(NumParams);
13108 else
13109 ConvertedArgs.reserve(NumArgs);
13110
13111 VariadicCallType CallType =
13112 Proto->isVariadic() ? VariadicConstructor : VariadicDoesNotApply;
13113 SmallVector<Expr *, 8> AllArgs;
13114 bool Invalid = GatherArgumentsForCall(Loc, Constructor,
13115 Proto, 0,
13116 llvm::makeArrayRef(Args, NumArgs),
13117 AllArgs,
13118 CallType, AllowExplicit,
13119 IsListInitialization);
13120 ConvertedArgs.append(AllArgs.begin(), AllArgs.end());
13121
13122 DiagnoseSentinelCalls(Constructor, Loc, AllArgs);
13123
13124 CheckConstructorCall(Constructor,
13125 llvm::makeArrayRef(AllArgs.data(), AllArgs.size()),
13126 Proto, Loc);
13127
13128 return Invalid;
13129 }
13130
13131 static inline bool
13132 CheckOperatorNewDeleteDeclarationScope(Sema &SemaRef,
13133 const FunctionDecl *FnDecl) {
13134 const DeclContext *DC = FnDecl->getDeclContext()->getRedeclContext();
13135 if (isa<NamespaceDecl>(DC)) {
13136 return SemaRef.Diag(FnDecl->getLocation(),
13137 diag::err_operator_new_delete_declared_in_namespace)
13138 << FnDecl->getDeclName();
13139 }
13140
13141 if (isa<TranslationUnitDecl>(DC) &&
13142 FnDecl->getStorageClass() == SC_Static) {
13143 return SemaRef.Diag(FnDecl->getLocation(),
13144 diag::err_operator_new_delete_declared_static)
13145 << FnDecl->getDeclName();
13146 }
13147
13148 return false;
13149 }
13150
13151 static QualType
13152 RemoveAddressSpaceFromPtr(Sema &SemaRef, const PointerType *PtrTy) {
13153 QualType QTy = PtrTy->getPointeeType();
13154 QTy = SemaRef.Context.removeAddrSpaceQualType(QTy);
13155 return SemaRef.Context.getPointerType(QTy);
13156 }
13157
13158 static inline bool
13159 CheckOperatorNewDeleteTypes(Sema &SemaRef, const FunctionDecl *FnDecl,
13160 CanQualType ExpectedResultType,
13161 CanQualType ExpectedFirstParamType,
13162 unsigned DependentParamTypeDiag,
13163 unsigned InvalidParamTypeDiag) {
13164 QualType ResultType =
13165 FnDecl->getType()->getAs<FunctionType>()->getReturnType();
13166
13167 // Check that the result type is not dependent.
13168 if (ResultType->isDependentType())
13169 return SemaRef.Diag(FnDecl->getLocation(),
13170 diag::err_operator_new_delete_dependent_result_type)
13171 << FnDecl->getDeclName() << ExpectedResultType;
13172
13173 // OpenCL C++: the operator is valid on any address space.
13174 if (SemaRef.getLangOpts().OpenCLCPlusPlus) {
13175 if (auto *PtrTy = ResultType->getAs<PointerType>()) {
13176 ResultType = RemoveAddressSpaceFromPtr(SemaRef, PtrTy);
13177 }
13178 }
13179
13180 // Check that the result type is what we expect.
13181 if (SemaRef.Context.getCanonicalType(ResultType) != ExpectedResultType)
13182 return SemaRef.Diag(FnDecl->getLocation(),
13183 diag::err_operator_new_delete_invalid_result_type)
13184 << FnDecl->getDeclName() << ExpectedResultType;
13185
13186 // A function template must have at least 2 parameters.
13187 if (FnDecl->getDescribedFunctionTemplate() && FnDecl->getNumParams() < 2)
13188 return SemaRef.Diag(FnDecl->getLocation(),
13189 diag::err_operator_new_delete_template_too_few_parameters)
13190 << FnDecl->getDeclName();
13191
13192 // The function decl must have at least 1 parameter.
13193 if (FnDecl->getNumParams() == 0)
13194 return SemaRef.Diag(FnDecl->getLocation(),
13195 diag::err_operator_new_delete_too_few_parameters)
13196 << FnDecl->getDeclName();
13197
13198 // Check the first parameter type is not dependent.
13199 QualType FirstParamType = FnDecl->getParamDecl(0)->getType();
13200 if (FirstParamType->isDependentType())
13201 return SemaRef.Diag(FnDecl->getLocation(), DependentParamTypeDiag)
13202 << FnDecl->getDeclName() << ExpectedFirstParamType;
13203
13204 // Check that the first parameter type is what we expect.
13205 if (SemaRef.getLangOpts().OpenCLCPlusPlus) {
13206 // OpenCL C++: the operator is valid on any address space.
13207 if (auto *PtrTy =
13208 FnDecl->getParamDecl(0)->getType()->getAs<PointerType>()) {
13209 FirstParamType = RemoveAddressSpaceFromPtr(SemaRef, PtrTy);
13210 }
13211 }
13212 if (SemaRef.Context.getCanonicalType(FirstParamType).getUnqualifiedType() !=
13213 ExpectedFirstParamType)
13214 return SemaRef.Diag(FnDecl->getLocation(), InvalidParamTypeDiag)
13215 << FnDecl->getDeclName() << ExpectedFirstParamType;
13216
13217 return false;
13218 }
13219
13220 static bool
13221 CheckOperatorNewDeclaration(Sema &SemaRef, const FunctionDecl *FnDecl) {
13222 // C++ [basic.stc.dynamic.allocation]p1:
13223 // A program is ill-formed if an allocation function is declared in a
13224 // namespace scope other than global scope or declared static in global
13225 // scope.
13226 if (CheckOperatorNewDeleteDeclarationScope(SemaRef, FnDecl))
13227 return true;
13228
13229 CanQualType SizeTy =
13230 SemaRef.Context.getCanonicalType(SemaRef.Context.getSizeType());
13231
13232 // C++ [basic.stc.dynamic.allocation]p1:
13233 // The return type shall be void*. The first parameter shall have type
13234 // std::size_t.
13235 if (CheckOperatorNewDeleteTypes(SemaRef, FnDecl, SemaRef.Context.VoidPtrTy,
13236 SizeTy,
13237 diag::err_operator_new_dependent_param_type,
13238 diag::err_operator_new_param_type))
13239 return true;
13240
13241 // C++ [basic.stc.dynamic.allocation]p1:
13242 // The first parameter shall not have an associated default argument.
13243 if (FnDecl->getParamDecl(0)->hasDefaultArg())
13244 return SemaRef.Diag(FnDecl->getLocation(),
13245 diag::err_operator_new_default_arg)
13246 << FnDecl->getDeclName() << FnDecl->getParamDecl(0)->getDefaultArgRange();
13247
13248 return false;
13249 }
13250
13251 static bool
13252 CheckOperatorDeleteDeclaration(Sema &SemaRef, FunctionDecl *FnDecl) {
13253 // C++ [basic.stc.dynamic.deallocation]p1:
13254 // A program is ill-formed if deallocation functions are declared in a
13255 // namespace scope other than global scope or declared static in global
13256 // scope.
13257 if (CheckOperatorNewDeleteDeclarationScope(SemaRef, FnDecl))
13258 return true;
13259
13260 auto *MD = dyn_cast<CXXMethodDecl>(FnDecl);
13261
13262 // C++ P0722:
13263 // Within a class C, the first parameter of a destroying operator delete
13264 // shall be of type C *. The first parameter of any other deallocation
13265 // function shall be of type void *.
13266 CanQualType ExpectedFirstParamType =
13267 MD && MD->isDestroyingOperatorDelete()
13268 ? SemaRef.Context.getCanonicalType(SemaRef.Context.getPointerType(
13269 SemaRef.Context.getRecordType(MD->getParent())))
13270 : SemaRef.Context.VoidPtrTy;
13271
13272 // C++ [basic.stc.dynamic.deallocation]p2:
13273 // Each deallocation function shall return void
13274 if (CheckOperatorNewDeleteTypes(
13275 SemaRef, FnDecl, SemaRef.Context.VoidTy, ExpectedFirstParamType,
13276 diag::err_operator_delete_dependent_param_type,
13277 diag::err_operator_delete_param_type))
13278 return true;
13279
13280 // C++ P0722:
13281 // A destroying operator delete shall be a usual deallocation function.
13282 if (MD && !MD->getParent()->isDependentContext() &&
13283 MD->isDestroyingOperatorDelete() &&
13284 !SemaRef.isUsualDeallocationFunction(MD)) {
13285 SemaRef.Diag(MD->getLocation(),
13286 diag::err_destroying_operator_delete_not_usual);
13287 return true;
13288 }
13289
13290 return false;
13291 }
13292
13293 /// CheckOverloadedOperatorDeclaration - Check whether the declaration
13294 /// of this overloaded operator is well-formed. If so, returns false;
13295 /// otherwise, emits appropriate diagnostics and returns true.
13296 bool Sema::CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl) {
13297 assert(FnDecl && FnDecl->isOverloadedOperator() &&
13298 "Expected an overloaded operator declaration");
13299
13300 OverloadedOperatorKind Op = FnDecl->getOverloadedOperator();
13301
13302 // C++ [over.oper]p5:
13303 // The allocation and deallocation functions, operator new,
13304 // operator new[], operator delete and operator delete[], are
13305 // described completely in 3.7.3. The attributes and restrictions
13306 // found in the rest of this subclause do not apply to them unless
13307 // explicitly stated in 3.7.3.
13308 if (Op == OO_Delete || Op == OO_Array_Delete)
13309 return CheckOperatorDeleteDeclaration(*this, FnDecl);
13310
13311 if (Op == OO_New || Op == OO_Array_New)
13312 return CheckOperatorNewDeclaration(*this, FnDecl);
13313
13314 // C++ [over.oper]p6:
13315 // An operator function shall either be a non-static member
13316 // function or be a non-member function and have at least one
13317 // parameter whose type is a class, a reference to a class, an
13318 // enumeration, or a reference to an enumeration.
13319 if (CXXMethodDecl *MethodDecl = dyn_cast<CXXMethodDecl>(FnDecl)) {
13320 if (MethodDecl->isStatic())
13321 return Diag(FnDecl->getLocation(),
13322 diag::err_operator_overload_static) << FnDecl->getDeclName();
13323 } else {
13324 bool ClassOrEnumParam = false;
13325 for (auto Param : FnDecl->parameters()) {
13326 QualType ParamType = Param->getType().getNonReferenceType();
13327 if (ParamType->isDependentType() || ParamType->isRecordType() ||
13328 ParamType->isEnumeralType()) {
13329 ClassOrEnumParam = true;
13330 break;
13331 }
13332 }
13333
13334 if (!ClassOrEnumParam)
13335 return Diag(FnDecl->getLocation(),
13336 diag::err_operator_overload_needs_class_or_enum)
13337 << FnDecl->getDeclName();
13338 }
13339
13340 // C++ [over.oper]p8:
13341 // An operator function cannot have default arguments (8.3.6),
13342 // except where explicitly stated below.
13343 //
13344 // Only the function-call operator allows default arguments
13345 // (C++ [over.call]p1).
13346 if (Op != OO_Call) {
13347 for (auto Param : FnDecl->parameters()) {
13348 if (Param->hasDefaultArg())
13349 return Diag(Param->getLocation(),
13350 diag::err_operator_overload_default_arg)
13351 << FnDecl->getDeclName() << Param->getDefaultArgRange();
13352 }
13353 }
13354
13355 static const bool OperatorUses[NUM_OVERLOADED_OPERATORS][3] = {
13356 { false, false, false }
13357 #define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
13358 , { Unary, Binary, MemberOnly }
13359 #include "clang/Basic/OperatorKinds.def"
13360 };
13361
13362 bool CanBeUnaryOperator = OperatorUses[Op][0];
13363 bool CanBeBinaryOperator = OperatorUses[Op][1];
13364 bool MustBeMemberOperator = OperatorUses[Op][2];
13365
13366 // C++ [over.oper]p8:
13367 // [...] Operator functions cannot have more or fewer parameters
13368 // than the number required for the corresponding operator, as
13369 // described in the rest of this subclause.
13370 unsigned NumParams = FnDecl->getNumParams()
13371 + (isa<CXXMethodDecl>(FnDecl)? 1 : 0);
13372 if (Op != OO_Call &&
13373 ((NumParams == 1 && !CanBeUnaryOperator) ||
13374 (NumParams == 2 && !CanBeBinaryOperator) ||
13375 (NumParams < 1) || (NumParams > 2))) {
13376 // We have the wrong number of parameters.
13377 unsigned ErrorKind;
13378 if (CanBeUnaryOperator && CanBeBinaryOperator) {
13379 ErrorKind = 2; // 2 -> unary or binary.
13380 } else if (CanBeUnaryOperator) {
13381 ErrorKind = 0; // 0 -> unary
13382 } else {
13383 assert(CanBeBinaryOperator &&
13384 "All non-call overloaded operators are unary or binary!");
13385 ErrorKind = 1; // 1 -> binary
13386 }
13387
13388 return Diag(FnDecl->getLocation(), diag::err_operator_overload_must_be)
13389 << FnDecl->getDeclName() << NumParams << ErrorKind;
13390 }
13391
13392 // Overloaded operators other than operator() cannot be variadic.
13393 if (Op != OO_Call &&
13394 FnDecl->getType()->getAs<FunctionProtoType>()->isVariadic()) {
13395 return Diag(FnDecl->getLocation(), diag::err_operator_overload_variadic)
13396 << FnDecl->getDeclName();
13397 }
13398
13399 // Some operators must be non-static member functions.
13400 if (MustBeMemberOperator && !isa<CXXMethodDecl>(FnDecl)) {
13401 return Diag(FnDecl->getLocation(),
13402 diag::err_operator_overload_must_be_member)
13403 << FnDecl->getDeclName();
13404 }
13405
13406 // C++ [over.inc]p1:
13407 // The user-defined function called operator++ implements the
13408 // prefix and postfix ++ operator. If this function is a member
13409 // function with no parameters, or a non-member function with one
13410 // parameter of class or enumeration type, it defines the prefix
13411 // increment operator ++ for objects of that type. If the function
13412 // is a member function with one parameter (which shall be of type
13413 // int) or a non-member function with two parameters (the second
13414 // of which shall be of type int), it defines the postfix
13415 // increment operator ++ for objects of that type.
13416 if ((Op == OO_PlusPlus || Op == OO_MinusMinus) && NumParams == 2) {
13417 ParmVarDecl *LastParam = FnDecl->getParamDecl(FnDecl->getNumParams() - 1);
13418 QualType ParamType = LastParam->getType();
13419
13420 if (!ParamType->isSpecificBuiltinType(BuiltinType::Int) &&
13421 !ParamType->isDependentType())
13422 return Diag(LastParam->getLocation(),
13423 diag::err_operator_overload_post_incdec_must_be_int)
13424 << LastParam->getType() << (Op == OO_MinusMinus);
13425 }
13426
13427 return false;
13428 }
13429
13430 static bool
13431 checkLiteralOperatorTemplateParameterList(Sema &SemaRef,
13432 FunctionTemplateDecl *TpDecl) {
13433 TemplateParameterList *TemplateParams = TpDecl->getTemplateParameters();
13434
13435 // Must have one or two template parameters.
13436 if (TemplateParams->size() == 1) {
13437 NonTypeTemplateParmDecl *PmDecl =
13438 dyn_cast<NonTypeTemplateParmDecl>(TemplateParams->getParam(0));
13439
13440 // The template parameter must be a char parameter pack.
13441 if (PmDecl && PmDecl->isTemplateParameterPack() &&
13442 SemaRef.Context.hasSameType(PmDecl->getType(), SemaRef.Context.CharTy))
13443 return false;
13444
13445 } else if (TemplateParams->size() == 2) {
13446 TemplateTypeParmDecl *PmType =
13447 dyn_cast<TemplateTypeParmDecl>(TemplateParams->getParam(0));
13448 NonTypeTemplateParmDecl *PmArgs =
13449 dyn_cast<NonTypeTemplateParmDecl>(TemplateParams->getParam(1));
13450
13451 // The second template parameter must be a parameter pack with the
13452 // first template parameter as its type.
13453 if (PmType && PmArgs && !PmType->isTemplateParameterPack() &&
13454 PmArgs->isTemplateParameterPack()) {
13455 const TemplateTypeParmType *TArgs =
13456 PmArgs->getType()->getAs<TemplateTypeParmType>();
13457 if (TArgs && TArgs->getDepth() == PmType->getDepth() &&
13458 TArgs->getIndex() == PmType->getIndex()) {
13459 if (!SemaRef.inTemplateInstantiation())
13460 SemaRef.Diag(TpDecl->getLocation(),
13461 diag::ext_string_literal_operator_template);
13462 return false;
13463 }
13464 }
13465 }
13466
13467 SemaRef.Diag(TpDecl->getTemplateParameters()->getSourceRange().getBegin(),
13468 diag::err_literal_operator_template)
13469 << TpDecl->getTemplateParameters()->getSourceRange();
13470 return true;
13471 }
13472
13473 /// CheckLiteralOperatorDeclaration - Check whether the declaration
13474 /// of this literal operator function is well-formed. If so, returns
13475 /// false; otherwise, emits appropriate diagnostics and returns true.
13476 bool Sema::CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl) {
13477 if (isa<CXXMethodDecl>(FnDecl)) {
13478 Diag(FnDecl->getLocation(), diag::err_literal_operator_outside_namespace)
13479 << FnDecl->getDeclName();
13480 return true;
13481 }
13482
13483 if (FnDecl->isExternC()) {
13484 Diag(FnDecl->getLocation(), diag::err_literal_operator_extern_c);
13485 if (const LinkageSpecDecl *LSD =
13486 FnDecl->getDeclContext()->getExternCContext())
13487 Diag(LSD->getExternLoc(), diag::note_extern_c_begins_here);
13488 return true;
13489 }
13490
13491 // This might be the definition of a literal operator template.
13492 FunctionTemplateDecl *TpDecl = FnDecl->getDescribedFunctionTemplate();
13493
13494 // This might be a specialization of a literal operator template.
13495 if (!TpDecl)
13496 TpDecl = FnDecl->getPrimaryTemplate();
13497
13498 // template <char...> type operator "" name() and
13499 // template <class T, T...> type operator "" name() are the only valid
13500 // template signatures, and the only valid signatures with no parameters.
13501 if (TpDecl) {
13502 if (FnDecl->param_size() != 0) {
13503 Diag(FnDecl->getLocation(),
13504 diag::err_literal_operator_template_with_params);
13505 return true;
13506 }
13507
13508 if (checkLiteralOperatorTemplateParameterList(*this, TpDecl))
13509 return true;
13510
13511 } else if (FnDecl->param_size() == 1) {
13512 const ParmVarDecl *Param = FnDecl->getParamDecl(0);
13513
13514 QualType ParamType = Param->getType().getUnqualifiedType();
13515
13516 // Only unsigned long long int, long double, any character type, and const
13517 // char * are allowed as the only parameters.
13518 if (ParamType->isSpecificBuiltinType(BuiltinType::ULongLong) ||
13519 ParamType->isSpecificBuiltinType(BuiltinType::LongDouble) ||
13520 Context.hasSameType(ParamType, Context.CharTy) ||
13521 Context.hasSameType(ParamType, Context.WideCharTy) ||
13522 Context.hasSameType(ParamType, Context.Char8Ty) ||
13523 Context.hasSameType(ParamType, Context.Char16Ty) ||
13524 Context.hasSameType(ParamType, Context.Char32Ty)) {
13525 } else if (const PointerType *Ptr = ParamType->getAs<PointerType>()) {
13526 QualType InnerType = Ptr->getPointeeType();
13527
13528 // Pointer parameter must be a const char *.
13529 if (!(Context.hasSameType(InnerType.getUnqualifiedType(),
13530 Context.CharTy) &&
13531 InnerType.isConstQualified() && !InnerType.isVolatileQualified())) {
13532 Diag(Param->getSourceRange().getBegin(),
13533 diag::err_literal_operator_param)
13534 << ParamType << "'const char *'" << Param->getSourceRange();
13535 return true;
13536 }
13537
13538 } else if (ParamType->isRealFloatingType()) {
13539 Diag(Param->getSourceRange().getBegin(), diag::err_literal_operator_param)
13540 << ParamType << Context.LongDoubleTy << Param->getSourceRange();
13541 return true;
13542
13543 } else if (ParamType->isIntegerType()) {
13544 Diag(Param->getSourceRange().getBegin(), diag::err_literal_operator_param)
13545 << ParamType << Context.UnsignedLongLongTy << Param->getSourceRange();
13546 return true;
13547
13548 } else {
13549 Diag(Param->getSourceRange().getBegin(),
13550 diag::err_literal_operator_invalid_param)
13551 << ParamType << Param->getSourceRange();
13552 return true;
13553 }
13554
13555 } else if (FnDecl->param_size() == 2) {
13556 FunctionDecl::param_iterator Param = FnDecl->param_begin();
13557
13558 // First, verify that the first parameter is correct.
13559
13560 QualType FirstParamType = (*Param)->getType().getUnqualifiedType();
13561
13562 // Two parameter function must have a pointer to const as a
13563 // first parameter; let's strip those qualifiers.
13564 const PointerType *PT = FirstParamType->getAs<PointerType>();
13565
13566 if (!PT) {
13567 Diag((*Param)->getSourceRange().getBegin(),
13568 diag::err_literal_operator_param)
13569 << FirstParamType << "'const char *'" << (*Param)->getSourceRange();
13570 return true;
13571 }
13572
13573 QualType PointeeType = PT->getPointeeType();
13574 // First parameter must be const
13575 if (!PointeeType.isConstQualified() || PointeeType.isVolatileQualified()) {
13576 Diag((*Param)->getSourceRange().getBegin(),
13577 diag::err_literal_operator_param)
13578 << FirstParamType << "'const char *'" << (*Param)->getSourceRange();
13579 return true;
13580 }
13581
13582 QualType InnerType = PointeeType.getUnqualifiedType();
13583 // Only const char *, const wchar_t*, const char8_t*, const char16_t*, and
13584 // const char32_t* are allowed as the first parameter to a two-parameter
13585 // function
13586 if (!(Context.hasSameType(InnerType, Context.CharTy) ||
13587 Context.hasSameType(InnerType, Context.WideCharTy) ||
13588 Context.hasSameType(InnerType, Context.Char8Ty) ||
13589 Context.hasSameType(InnerType, Context.Char16Ty) ||
13590 Context.hasSameType(InnerType, Context.Char32Ty))) {
13591 Diag((*Param)->getSourceRange().getBegin(),
13592 diag::err_literal_operator_param)
13593 << FirstParamType << "'const char *'" << (*Param)->getSourceRange();
13594 return true;
13595 }
13596
13597 // Move on to the second and final parameter.
13598 ++Param;
13599
13600 // The second parameter must be a std::size_t.
13601 QualType SecondParamType = (*Param)->getType().getUnqualifiedType();
13602 if (!Context.hasSameType(SecondParamType, Context.getSizeType())) {
13603 Diag((*Param)->getSourceRange().getBegin(),
13604 diag::err_literal_operator_param)
13605 << SecondParamType << Context.getSizeType()
13606 << (*Param)->getSourceRange();
13607 return true;
13608 }
13609 } else {
13610 Diag(FnDecl->getLocation(), diag::err_literal_operator_bad_param_count);
13611 return true;
13612 }
13613
13614 // Parameters are good.
13615
13616 // A parameter-declaration-clause containing a default argument is not
13617 // equivalent to any of the permitted forms.
13618 for (auto Param : FnDecl->parameters()) {
13619 if (Param->hasDefaultArg()) {
13620 Diag(Param->getDefaultArgRange().getBegin(),
13621 diag::err_literal_operator_default_argument)
13622 << Param->getDefaultArgRange();
13623 break;
13624 }
13625 }
13626
13627 StringRef LiteralName
13628 = FnDecl->getDeclName().getCXXLiteralIdentifier()->getName();
13629 if (LiteralName[0] != '_' &&
13630 !getSourceManager().isInSystemHeader(FnDecl->getLocation())) {
13631 // C++11 [usrlit.suffix]p1:
13632 // Literal suffix identifiers that do not start with an underscore
13633 // are reserved for future standardization.
13634 Diag(FnDecl->getLocation(), diag::warn_user_literal_reserved)
13635 << StringLiteralParser::isValidUDSuffix(getLangOpts(), LiteralName);
13636 }
13637
13638 return false;
13639 }
13640
13641 /// ActOnStartLinkageSpecification - Parsed the beginning of a C++
13642 /// linkage specification, including the language and (if present)
13643 /// the '{'. ExternLoc is the location of the 'extern', Lang is the
13644 /// language string literal. LBraceLoc, if valid, provides the location of
13645 /// the '{' brace. Otherwise, this linkage specification does not
13646 /// have any braces.
13647 Decl *Sema::ActOnStartLinkageSpecification(Scope *S, SourceLocation ExternLoc,
13648 Expr *LangStr,
13649 SourceLocation LBraceLoc) {
13650 StringLiteral *Lit = cast<StringLiteral>(LangStr);
13651 if (!Lit->isAscii()) {
13652 Diag(LangStr->getExprLoc(), diag::err_language_linkage_spec_not_ascii)
13653 << LangStr->getSourceRange();
13654 return nullptr;
13655 }
13656
13657 StringRef Lang = Lit->getString();
13658 LinkageSpecDecl::LanguageIDs Language;
13659 if (Lang == "C")
13660 Language = LinkageSpecDecl::lang_c;
13661 else if (Lang == "C++")
13662 Language = LinkageSpecDecl::lang_cxx;
13663 else {
13664 Diag(LangStr->getExprLoc(), diag::err_language_linkage_spec_unknown)
13665 << LangStr->getSourceRange();
13666 return nullptr;
13667 }
13668
13669 // FIXME: Add all the various semantics of linkage specifications
13670
13671 LinkageSpecDecl *D = LinkageSpecDecl::Create(Context, CurContext, ExternLoc,
13672 LangStr->getExprLoc(), Language,
13673 LBraceLoc.isValid());
13674 CurContext->addDecl(D);
13675 PushDeclContext(S, D);
13676 return D;
13677 }
13678
13679 /// ActOnFinishLinkageSpecification - Complete the definition of
13680 /// the C++ linkage specification LinkageSpec. If RBraceLoc is
13681 /// valid, it's the position of the closing '}' brace in a linkage
13682 /// specification that uses braces.
13683 Decl *Sema::ActOnFinishLinkageSpecification(Scope *S,
13684 Decl *LinkageSpec,
13685 SourceLocation RBraceLoc) {
13686 if (RBraceLoc.isValid()) {
13687 LinkageSpecDecl* LSDecl = cast<LinkageSpecDecl>(LinkageSpec);
13688 LSDecl->setRBraceLoc(RBraceLoc);
13689 }
13690 PopDeclContext();
13691 return LinkageSpec;
13692 }
13693
13694 Decl *Sema::ActOnEmptyDeclaration(Scope *S,
13695 const ParsedAttributesView &AttrList,
13696 SourceLocation SemiLoc) {
13697 Decl *ED = EmptyDecl::Create(Context, CurContext, SemiLoc);
13698 // Attribute declarations appertain to empty declaration so we handle
13699 // them here.
13700 ProcessDeclAttributeList(S, ED, AttrList);
13701
13702 CurContext->addDecl(ED);
13703 return ED;
13704 }
13705
13706 /// Perform semantic analysis for the variable declaration that
13707 /// occurs within a C++ catch clause, returning the newly-created
13708 /// variable.
13709 VarDecl *Sema::BuildExceptionDeclaration(Scope *S,
13710 TypeSourceInfo *TInfo,
13711 SourceLocation StartLoc,
13712 SourceLocation Loc,
13713 IdentifierInfo *Name) {
13714 bool Invalid = false;
13715 QualType ExDeclType = TInfo->getType();
13716
13717 // Arrays and functions decay.
13718 if (ExDeclType->isArrayType())
13719 ExDeclType = Context.getArrayDecayedType(ExDeclType);
13720 else if (ExDeclType->isFunctionType())
13721 ExDeclType = Context.getPointerType(ExDeclType);
13722
13723 // C++ 15.3p1: The exception-declaration shall not denote an incomplete type.
13724 // The exception-declaration shall not denote a pointer or reference to an
13725 // incomplete type, other than [cv] void*.
13726 // N2844 forbids rvalue references.
13727 if (!ExDeclType->isDependentType() && ExDeclType->isRValueReferenceType()) {
13728 Diag(Loc, diag::err_catch_rvalue_ref);
13729 Invalid = true;
13730 }
13731
13732 if (ExDeclType->isVariablyModifiedType()) {
13733 Diag(Loc, diag::err_catch_variably_modified) << ExDeclType;
13734 Invalid = true;
13735 }
13736
13737 QualType BaseType = ExDeclType;
13738 int Mode = 0; // 0 for direct type, 1 for pointer, 2 for reference
13739 unsigned DK = diag::err_catch_incomplete;
13740 if (const PointerType *Ptr = BaseType->getAs<PointerType>()) {
13741 BaseType = Ptr->getPointeeType();
13742 Mode = 1;
13743 DK = diag::err_catch_incomplete_ptr;
13744 } else if (const ReferenceType *Ref = BaseType->getAs<ReferenceType>()) {
13745 // For the purpose of error recovery, we treat rvalue refs like lvalue refs.
13746 BaseType = Ref->getPointeeType();
13747 Mode = 2;
13748 DK = diag::err_catch_incomplete_ref;
13749 }
13750 if (!Invalid && (Mode == 0 || !BaseType->isVoidType()) &&
13751 !BaseType->isDependentType() && RequireCompleteType(Loc, BaseType, DK))
13752 Invalid = true;
13753
13754 if (!Invalid && !ExDeclType->isDependentType() &&
13755 RequireNonAbstractType(Loc, ExDeclType,
13756 diag::err_abstract_type_in_decl,
13757 AbstractVariableType))
13758 Invalid = true;
13759
13760 // Only the non-fragile NeXT runtime currently supports C++ catches
13761 // of ObjC types, and no runtime supports catching ObjC types by value.
13762 if (!Invalid && getLangOpts().ObjC) {
13763 QualType T = ExDeclType;
13764 if (const ReferenceType *RT = T->getAs<ReferenceType>())
13765 T = RT->getPointeeType();
13766
13767 if (T->isObjCObjectType()) {
13768 Diag(Loc, diag::err_objc_object_catch);
13769 Invalid = true;
13770 } else if (T->isObjCObjectPointerType()) {
13771 // FIXME: should this be a test for macosx-fragile specifically?
13772 if (getLangOpts().ObjCRuntime.isFragile())
13773 Diag(Loc, diag::warn_objc_pointer_cxx_catch_fragile);
13774 }
13775 }
13776
13777 VarDecl *ExDecl = VarDecl::Create(Context, CurContext, StartLoc, Loc, Name,
13778 ExDeclType, TInfo, SC_None);
13779 ExDecl->setExceptionVariable(true);
13780
13781 // In ARC, infer 'retaining' for variables of retainable type.
13782 if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(ExDecl))
13783 Invalid = true;
13784
13785 if (!Invalid && !ExDeclType->isDependentType()) {
13786 if (const RecordType *recordType = ExDeclType->getAs<RecordType>()) {
13787 // Insulate this from anything else we might currently be parsing.
13788 EnterExpressionEvaluationContext scope(
13789 *this, ExpressionEvaluationContext::PotentiallyEvaluated);
13790
13791 // C++ [except.handle]p16:
13792 // The object declared in an exception-declaration or, if the
13793 // exception-declaration does not specify a name, a temporary (12.2) is
13794 // copy-initialized (8.5) from the exception object. [...]
13795 // The object is destroyed when the handler exits, after the destruction
13796 // of any automatic objects initialized within the handler.
13797 //
13798 // We just pretend to initialize the object with itself, then make sure
13799 // it can be destroyed later.
13800 QualType initType = Context.getExceptionObjectType(ExDeclType);
13801
13802 InitializedEntity entity =
13803 InitializedEntity::InitializeVariable(ExDecl);
13804 InitializationKind initKind =
13805 InitializationKind::CreateCopy(Loc, SourceLocation());
13806
13807 Expr *opaqueValue =
13808 new (Context) OpaqueValueExpr(Loc, initType, VK_LValue, OK_Ordinary);
13809 InitializationSequence sequence(*this, entity, initKind, opaqueValue);
13810 ExprResult result = sequence.Perform(*this, entity, initKind, opaqueValue);
13811 if (result.isInvalid())
13812 Invalid = true;
13813 else {
13814 // If the constructor used was non-trivial, set this as the
13815 // "initializer".
13816 CXXConstructExpr *construct = result.getAs<CXXConstructExpr>();
13817 if (!construct->getConstructor()->isTrivial()) {
13818 Expr *init = MaybeCreateExprWithCleanups(construct);
13819 ExDecl->setInit(init);
13820 }
13821
13822 // And make sure it's destructable.
13823 FinalizeVarWithDestructor(ExDecl, recordType);
13824 }
13825 }
13826 }
13827
13828 if (Invalid)
13829 ExDecl->setInvalidDecl();
13830
13831 return ExDecl;
13832 }
13833
13834 /// ActOnExceptionDeclarator - Parsed the exception-declarator in a C++ catch
13835 /// handler.
13836 Decl *Sema::ActOnExceptionDeclarator(Scope *S, Declarator &D) {
13837 TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S);
13838 bool Invalid = D.isInvalidType();
13839
13840 // Check for unexpanded parameter packs.
13841 if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo,
13842 UPPC_ExceptionType)) {
13843 TInfo = Context.getTrivialTypeSourceInfo(Context.IntTy,
13844 D.getIdentifierLoc());
13845 Invalid = true;
13846 }
13847
13848 IdentifierInfo *II = D.getIdentifier();
13849 if (NamedDecl *PrevDecl = LookupSingleName(S, II, D.getIdentifierLoc(),
13850 LookupOrdinaryName,
13851 ForVisibleRedeclaration)) {
13852 // The scope should be freshly made just for us. There is just no way
13853 // it contains any previous declaration, except for function parameters in
13854 // a function-try-block's catch statement.
13855 assert(!S->isDeclScope(PrevDecl));
13856 if (isDeclInScope(PrevDecl, CurContext, S)) {
13857 Diag(D.getIdentifierLoc(), diag::err_redefinition)
13858 << D.getIdentifier();
13859 Diag(PrevDecl->getLocation(), diag::note_previous_definition);
13860 Invalid = true;
13861 } else if (PrevDecl->isTemplateParameter())
13862 // Maybe we will complain about the shadowed template parameter.
13863 DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl);
13864 }
13865
13866 if (D.getCXXScopeSpec().isSet() && !Invalid) {
13867 Diag(D.getIdentifierLoc(), diag::err_qualified_catch_declarator)
13868 << D.getCXXScopeSpec().getRange();
13869 Invalid = true;
13870 }
13871
13872 VarDecl *ExDecl = BuildExceptionDeclaration(
13873 S, TInfo, D.getBeginLoc(), D.getIdentifierLoc(), D.getIdentifier());
13874 if (Invalid)
13875 ExDecl->setInvalidDecl();
13876
13877 // Add the exception declaration into this scope.
13878 if (II)
13879 PushOnScopeChains(ExDecl, S);
13880 else
13881 CurContext->addDecl(ExDecl);
13882
13883 ProcessDeclAttributes(S, ExDecl, D);
13884 return ExDecl;
13885 }
13886
13887 Decl *Sema::ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc,
13888 Expr *AssertExpr,
13889 Expr *AssertMessageExpr,
13890 SourceLocation RParenLoc) {
13891 StringLiteral *AssertMessage =
13892 AssertMessageExpr ? cast<StringLiteral>(AssertMessageExpr) : nullptr;
13893
13894 if (DiagnoseUnexpandedParameterPack(AssertExpr, UPPC_StaticAssertExpression))
13895 return nullptr;
13896
13897 return BuildStaticAssertDeclaration(StaticAssertLoc, AssertExpr,
13898 AssertMessage, RParenLoc, false);
13899 }
13900
13901 Decl *Sema::BuildStaticAssertDeclaration(SourceLocation StaticAssertLoc,
13902 Expr *AssertExpr,
13903 StringLiteral *AssertMessage,
13904 SourceLocation RParenLoc,
13905 bool Failed) {
13906 assert(AssertExpr != nullptr && "Expected non-null condition");
13907 if (!AssertExpr->isTypeDependent() && !AssertExpr->isValueDependent() &&
13908 !Failed) {
13909 // In a static_assert-declaration, the constant-expression shall be a
13910 // constant expression that can be contextually converted to bool.
13911 ExprResult Converted = PerformContextuallyConvertToBool(AssertExpr);
13912 if (Converted.isInvalid())
13913 Failed = true;
13914 else
13915 Converted = ConstantExpr::Create(Context, Converted.get());
13916
13917 llvm::APSInt Cond;
13918 if (!Failed && VerifyIntegerConstantExpression(Converted.get(), &Cond,
13919 diag::err_static_assert_expression_is_not_constant,
13920 /*AllowFold=*/false).isInvalid())
13921 Failed = true;
13922
13923 if (!Failed && !Cond) {
13924 SmallString<256> MsgBuffer;
13925 llvm::raw_svector_ostream Msg(MsgBuffer);
13926 if (AssertMessage)
13927 AssertMessage->printPretty(Msg, nullptr, getPrintingPolicy());
13928
13929 Expr *InnerCond = nullptr;
13930 std::string InnerCondDescription;
13931 std::tie(InnerCond, InnerCondDescription) =
13932 findFailedBooleanCondition(Converted.get());
13933 if (InnerCond && !isa<CXXBoolLiteralExpr>(InnerCond)
13934 && !isa<IntegerLiteral>(InnerCond)) {
13935 Diag(StaticAssertLoc, diag::err_static_assert_requirement_failed)
13936 << InnerCondDescription << !AssertMessage
13937 << Msg.str() << InnerCond->getSourceRange();
13938 } else {
13939 Diag(StaticAssertLoc, diag::err_static_assert_failed)
13940 << !AssertMessage << Msg.str() << AssertExpr->getSourceRange();
13941 }
13942 Failed = true;
13943 }
13944 }
13945
13946 ExprResult FullAssertExpr = ActOnFinishFullExpr(AssertExpr, StaticAssertLoc,
13947 /*DiscardedValue*/false,
13948 /*IsConstexpr*/true);
13949 if (FullAssertExpr.isInvalid())
13950 Failed = true;
13951 else
13952 AssertExpr = FullAssertExpr.get();
13953
13954 Decl *Decl = StaticAssertDecl::Create(Context, CurContext, StaticAssertLoc,
13955 AssertExpr, AssertMessage, RParenLoc,
13956 Failed);
13957
13958 CurContext->addDecl(Decl);
13959 return Decl;
13960 }
13961
13962 /// Perform semantic analysis of the given friend type declaration.
13963 ///
13964 /// \returns A friend declaration that.
13965 FriendDecl *Sema::CheckFriendTypeDecl(SourceLocation LocStart,
13966 SourceLocation FriendLoc,
13967 TypeSourceInfo *TSInfo) {
13968 assert(TSInfo && "NULL TypeSourceInfo for friend type declaration");
13969
13970 QualType T = TSInfo->getType();
13971 SourceRange TypeRange = TSInfo->getTypeLoc().getLocalSourceRange();
13972
13973 // C++03 [class.friend]p2:
13974 // An elaborated-type-specifier shall be used in a friend declaration
13975 // for a class.*
13976 //
13977 // * The class-key of the elaborated-type-specifier is required.
13978 if (!CodeSynthesisContexts.empty()) {
13979 // Do not complain about the form of friend template types during any kind
13980 // of code synthesis. For template instantiation, we will have complained
13981 // when the template was defined.
13982 } else {
13983 if (!T->isElaboratedTypeSpecifier()) {
13984 // If we evaluated the type to a record type, suggest putting
13985 // a tag in front.
13986 if (const RecordType *RT = T->getAs<RecordType>()) {
13987 RecordDecl *RD = RT->getDecl();
13988
13989 SmallString<16> InsertionText(" ");
13990 InsertionText += RD->getKindName();
13991
13992 Diag(TypeRange.getBegin(),
13993 getLangOpts().CPlusPlus11 ?
13994 diag::warn_cxx98_compat_unelaborated_friend_type :
13995 diag::ext_unelaborated_friend_type)
13996 << (unsigned) RD->getTagKind()
13997 << T
13998 << FixItHint::CreateInsertion(getLocForEndOfToken(FriendLoc),
13999 InsertionText);
14000 } else {
14001 Diag(FriendLoc,
14002 getLangOpts().CPlusPlus11 ?
14003 diag::warn_cxx98_compat_nonclass_type_friend :
14004 diag::ext_nonclass_type_friend)
14005 << T
14006 << TypeRange;
14007 }
14008 } else if (T->getAs<EnumType>()) {
14009 Diag(FriendLoc,
14010 getLangOpts().CPlusPlus11 ?
14011 diag::warn_cxx98_compat_enum_friend :
14012 diag::ext_enum_friend)
14013 << T
14014 << TypeRange;
14015 }
14016
14017 // C++11 [class.friend]p3:
14018 // A friend declaration that does not declare a function shall have one
14019 // of the following forms:
14020 // friend elaborated-type-specifier ;
14021 // friend simple-type-specifier ;
14022 // friend typename-specifier ;
14023 if (getLangOpts().CPlusPlus11 && LocStart != FriendLoc)
14024 Diag(FriendLoc, diag::err_friend_not_first_in_declaration) << T;
14025 }
14026
14027 // If the type specifier in a friend declaration designates a (possibly
14028 // cv-qualified) class type, that class is declared as a friend; otherwise,
14029 // the friend declaration is ignored.
14030 return FriendDecl::Create(Context, CurContext,
14031 TSInfo->getTypeLoc().getBeginLoc(), TSInfo,
14032 FriendLoc);
14033 }
14034
14035 /// Handle a friend tag declaration where the scope specifier was
14036 /// templated.
14037 Decl *Sema::ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc,
14038 unsigned TagSpec, SourceLocation TagLoc,
14039 CXXScopeSpec &SS, IdentifierInfo *Name,
14040 SourceLocation NameLoc,
14041 const ParsedAttributesView &Attr,
14042 MultiTemplateParamsArg TempParamLists) {
14043 TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec);
14044
14045 bool IsMemberSpecialization = false;
14046 bool Invalid = false;
14047
14048 if (TemplateParameterList *TemplateParams =
14049 MatchTemplateParametersToScopeSpecifier(
14050 TagLoc, NameLoc, SS, nullptr, TempParamLists, /*friend*/ true,
14051 IsMemberSpecialization, Invalid)) {
14052 if (TemplateParams->size() > 0) {
14053 // This is a declaration of a class template.
14054 if (Invalid)
14055 return nullptr;
14056
14057 return CheckClassTemplate(S, TagSpec, TUK_Friend, TagLoc, SS, Name,
14058 NameLoc, Attr, TemplateParams, AS_public,
14059 /*ModulePrivateLoc=*/SourceLocation(),
14060 FriendLoc, TempParamLists.size() - 1,
14061 TempParamLists.data()).get();
14062 } else {
14063 // The "template<>" header is extraneous.
14064 Diag(TemplateParams->getTemplateLoc(), diag::err_template_tag_noparams)
14065 << TypeWithKeyword::getTagTypeKindName(Kind) << Name;
14066 IsMemberSpecialization = true;
14067 }
14068 }
14069
14070 if (Invalid) return nullptr;
14071
14072 bool isAllExplicitSpecializations = true;
14073 for (unsigned I = TempParamLists.size(); I-- > 0; ) {
14074 if (TempParamLists[I]->size()) {
14075 isAllExplicitSpecializations = false;
14076 break;
14077 }
14078 }
14079
14080 // FIXME: don't ignore attributes.
14081
14082 // If it's explicit specializations all the way down, just forget
14083 // about the template header and build an appropriate non-templated
14084 // friend. TODO: for source fidelity, remember the headers.
14085 if (isAllExplicitSpecializations) {
14086 if (SS.isEmpty()) {
14087 bool Owned = false;
14088 bool IsDependent = false;
14089 return ActOnTag(S, TagSpec, TUK_Friend, TagLoc, SS, Name, NameLoc,
14090 Attr, AS_public,
14091 /*ModulePrivateLoc=*/SourceLocation(),
14092 MultiTemplateParamsArg(), Owned, IsDependent,
14093 /*ScopedEnumKWLoc=*/SourceLocation(),
14094 /*ScopedEnumUsesClassTag=*/false,
14095 /*UnderlyingType=*/TypeResult(),
14096 /*IsTypeSpecifier=*/false,
14097 /*IsTemplateParamOrArg=*/false);
14098 }
14099
14100 NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context);
14101 ElaboratedTypeKeyword Keyword
14102 = TypeWithKeyword::getKeywordForTagTypeKind(Kind);
14103 QualType T = CheckTypenameType(Keyword, TagLoc, QualifierLoc,
14104 *Name, NameLoc);
14105 if (T.isNull())
14106 return nullptr;
14107
14108 TypeSourceInfo *TSI = Context.CreateTypeSourceInfo(T);
14109 if (isa<DependentNameType>(T)) {
14110 DependentNameTypeLoc TL =
14111 TSI->getTypeLoc().castAs<DependentNameTypeLoc>();
14112 TL.setElaboratedKeywordLoc(TagLoc);
14113 TL.setQualifierLoc(QualifierLoc);
14114 TL.setNameLoc(NameLoc);
14115 } else {
14116 ElaboratedTypeLoc TL = TSI->getTypeLoc().castAs<ElaboratedTypeLoc>();
14117 TL.setElaboratedKeywordLoc(TagLoc);
14118 TL.setQualifierLoc(QualifierLoc);
14119 TL.getNamedTypeLoc().castAs<TypeSpecTypeLoc>().setNameLoc(NameLoc);
14120 }
14121
14122 FriendDecl *Friend = FriendDecl::Create(Context, CurContext, NameLoc,
14123 TSI, FriendLoc, TempParamLists);
14124 Friend->setAccess(AS_public);
14125 CurContext->addDecl(Friend);
14126 return Friend;
14127 }
14128
14129 assert(SS.isNotEmpty() && "valid templated tag with no SS and no direct?");
14130
14131
14132
14133 // Handle the case of a templated-scope friend class. e.g.
14134 // template <class T> class A<T>::B;
14135 // FIXME: we don't support these right now.
14136 Diag(NameLoc, diag::warn_template_qualified_friend_unsupported)
14137 << SS.getScopeRep() << SS.getRange() << cast<CXXRecordDecl>(CurContext);
14138 ElaboratedTypeKeyword ETK = TypeWithKeyword::getKeywordForTagTypeKind(Kind);
14139 QualType T = Context.getDependentNameType(ETK, SS.getScopeRep(), Name);
14140 TypeSourceInfo *TSI = Context.CreateTypeSourceInfo(T);
14141 DependentNameTypeLoc TL = TSI->getTypeLoc().castAs<DependentNameTypeLoc>();
14142 TL.setElaboratedKeywordLoc(TagLoc);
14143 TL.setQualifierLoc(SS.getWithLocInContext(Context));
14144 TL.setNameLoc(NameLoc);
14145
14146 FriendDecl *Friend = FriendDecl::Create(Context, CurContext, NameLoc,
14147 TSI, FriendLoc, TempParamLists);
14148 Friend->setAccess(AS_public);
14149 Friend->setUnsupportedFriend(true);
14150 CurContext->addDecl(Friend);
14151 return Friend;
14152 }
14153
14154 /// Handle a friend type declaration. This works in tandem with
14155 /// ActOnTag.
14156 ///
14157 /// Notes on friend class templates:
14158 ///
14159 /// We generally treat friend class declarations as if they were
14160 /// declaring a class. So, for example, the elaborated type specifier
14161 /// in a friend declaration is required to obey the restrictions of a
14162 /// class-head (i.e. no typedefs in the scope chain), template
14163 /// parameters are required to match up with simple template-ids, &c.
14164 /// However, unlike when declaring a template specialization, it's
14165 /// okay to refer to a template specialization without an empty
14166 /// template parameter declaration, e.g.
14167 /// friend class A<T>::B<unsigned>;
14168 /// We permit this as a special case; if there are any template
14169 /// parameters present at all, require proper matching, i.e.
14170 /// template <> template <class T> friend class A<int>::B;
14171 Decl *Sema::ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS,
14172 MultiTemplateParamsArg TempParams) {
14173 SourceLocation Loc = DS.getBeginLoc();
14174
14175 assert(DS.isFriendSpecified());
14176 assert(DS.getStorageClassSpec() == DeclSpec::SCS_unspecified);
14177
14178 // C++ [class.friend]p3:
14179 // A friend declaration that does not declare a function shall have one of
14180 // the following forms:
14181 // friend elaborated-type-specifier ;
14182 // friend simple-type-specifier ;
14183 // friend typename-specifier ;
14184 //
14185 // Any declaration with a type qualifier does not have that form. (It's
14186 // legal to specify a qualified type as a friend, you just can't write the
14187 // keywords.)
14188 if (DS.getTypeQualifiers()) {
14189 if (DS.getTypeQualifiers() & DeclSpec::TQ_const)
14190 Diag(DS.getConstSpecLoc(), diag::err_friend_decl_spec) << "const";
14191 if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile)
14192 Diag(DS.getVolatileSpecLoc(), diag::err_friend_decl_spec) << "volatile";
14193 if (DS.getTypeQualifiers() & DeclSpec::TQ_restrict)
14194 Diag(DS.getRestrictSpecLoc(), diag::err_friend_decl_spec) << "restrict";
14195 if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic)
14196 Diag(DS.getAtomicSpecLoc(), diag::err_friend_decl_spec) << "_Atomic";
14197 if (DS.getTypeQualifiers() & DeclSpec::TQ_unaligned)
14198 Diag(DS.getUnalignedSpecLoc(), diag::err_friend_decl_spec) << "__unaligned";
14199 }
14200
14201 // Try to convert the decl specifier to a type. This works for
14202 // friend templates because ActOnTag never produces a ClassTemplateDecl
14203 // for a TUK_Friend.
14204 Declarator TheDeclarator(DS, DeclaratorContext::MemberContext);
14205 TypeSourceInfo *TSI = GetTypeForDeclarator(TheDeclarator, S);
14206 QualType T = TSI->getType();
14207 if (TheDeclarator.isInvalidType())
14208 return nullptr;
14209
14210 if (DiagnoseUnexpandedParameterPack(Loc, TSI, UPPC_FriendDeclaration))
14211 return nullptr;
14212
14213 // This is definitely an error in C++98. It's probably meant to
14214 // be forbidden in C++0x, too, but the specification is just
14215 // poorly written.
14216 //
14217 // The problem is with declarations like the following:
14218 // template <T> friend A<T>::foo;
14219 // where deciding whether a class C is a friend or not now hinges
14220 // on whether there exists an instantiation of A that causes
14221 // 'foo' to equal C. There are restrictions on class-heads
14222 // (which we declare (by fiat) elaborated friend declarations to
14223 // be) that makes this tractable.
14224 //
14225 // FIXME: handle "template <> friend class A<T>;", which
14226 // is possibly well-formed? Who even knows?
14227 if (TempParams.size() && !T->isElaboratedTypeSpecifier()) {
14228 Diag(Loc, diag::err_tagless_friend_type_template)
14229 << DS.getSourceRange();
14230 return nullptr;
14231 }
14232
14233 // C++98 [class.friend]p1: A friend of a class is a function
14234 // or class that is not a member of the class . . .
14235 // This is fixed in DR77, which just barely didn't make the C++03
14236 // deadline. It's also a very silly restriction that seriously
14237 // affects inner classes and which nobody else seems to implement;
14238 // thus we never diagnose it, not even in -pedantic.
14239 //
14240 // But note that we could warn about it: it's always useless to
14241 // friend one of your own members (it's not, however, worthless to
14242 // friend a member of an arbitrary specialization of your template).
14243
14244 Decl *D;
14245 if (!TempParams.empty())
14246 D = FriendTemplateDecl::Create(Context, CurContext, Loc,
14247 TempParams,
14248 TSI,
14249 DS.getFriendSpecLoc());
14250 else
14251 D = CheckFriendTypeDecl(Loc, DS.getFriendSpecLoc(), TSI);
14252
14253 if (!D)
14254 return nullptr;
14255
14256 D->setAccess(AS_public);
14257 CurContext->addDecl(D);
14258
14259 return D;
14260 }
14261
14262 NamedDecl *Sema::ActOnFriendFunctionDecl(Scope *S, Declarator &D,
14263 MultiTemplateParamsArg TemplateParams) {
14264 const DeclSpec &DS = D.getDeclSpec();
14265
14266 assert(DS.isFriendSpecified());
14267 assert(DS.getStorageClassSpec() == DeclSpec::SCS_unspecified);
14268
14269 SourceLocation Loc = D.getIdentifierLoc();
14270 TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S);
14271
14272 // C++ [class.friend]p1
14273 // A friend of a class is a function or class....
14274 // Note that this sees through typedefs, which is intended.
14275 // It *doesn't* see through dependent types, which is correct
14276 // according to [temp.arg.type]p3:
14277 // If a declaration acquires a function type through a
14278 // type dependent on a template-parameter and this causes
14279 // a declaration that does not use the syntactic form of a
14280 // function declarator to have a function type, the program
14281 // is ill-formed.
14282 if (!TInfo->getType()->isFunctionType()) {
14283 Diag(Loc, diag::err_unexpected_friend);
14284
14285 // It might be worthwhile to try to recover by creating an
14286 // appropriate declaration.
14287 return nullptr;
14288 }
14289
14290 // C++ [namespace.memdef]p3
14291 // - If a friend declaration in a non-local class first declares a
14292 // class or function, the friend class or function is a member
14293 // of the innermost enclosing namespace.
14294 // - The name of the friend is not found by simple name lookup
14295 // until a matching declaration is provided in that namespace
14296 // scope (either before or after the class declaration granting
14297 // friendship).
14298 // - If a friend function is called, its name may be found by the
14299 // name lookup that considers functions from namespaces and
14300 // classes associated with the types of the function arguments.
14301 // - When looking for a prior declaration of a class or a function
14302 // declared as a friend, scopes outside the innermost enclosing
14303 // namespace scope are not considered.
14304
14305 CXXScopeSpec &SS = D.getCXXScopeSpec();
14306 DeclarationNameInfo NameInfo = GetNameForDeclarator(D);
14307 assert(NameInfo.getName());
14308
14309 // Check for unexpanded parameter packs.
14310 if (DiagnoseUnexpandedParameterPack(Loc, TInfo, UPPC_FriendDeclaration) ||
14311 DiagnoseUnexpandedParameterPack(NameInfo, UPPC_FriendDeclaration) ||
14312 DiagnoseUnexpandedParameterPack(SS, UPPC_FriendDeclaration))
14313 return nullptr;
14314
14315 // The context we found the declaration in, or in which we should
14316 // create the declaration.
14317 DeclContext *DC;
14318 Scope *DCScope = S;
14319 LookupResult Previous(*this, NameInfo, LookupOrdinaryName,
14320 ForExternalRedeclaration);
14321
14322 // There are five cases here.
14323 // - There's no scope specifier and we're in a local class. Only look
14324 // for functions declared in the immediately-enclosing block scope.
14325 // We recover from invalid scope qualifiers as if they just weren't there.
14326 FunctionDecl *FunctionContainingLocalClass = nullptr;
14327 if ((SS.isInvalid() || !SS.isSet()) &&
14328 (FunctionContainingLocalClass =
14329 cast<CXXRecordDecl>(CurContext)->isLocalClass())) {
14330 // C++11 [class.friend]p11:
14331 // If a friend declaration appears in a local class and the name
14332 // specified is an unqualified name, a prior declaration is
14333 // looked up without considering scopes that are outside the
14334 // innermost enclosing non-class scope. For a friend function
14335 // declaration, if there is no prior declaration, the program is
14336 // ill-formed.
14337
14338 // Find the innermost enclosing non-class scope. This is the block
14339 // scope containing the local class definition (or for a nested class,
14340 // the outer local class).
14341 DCScope = S->getFnParent();
14342
14343 // Look up the function name in the scope.
14344 Previous.clear(LookupLocalFriendName);
14345 LookupName(Previous, S, /*AllowBuiltinCreation*/false);
14346
14347 if (!Previous.empty()) {
14348 // All possible previous declarations must have the same context:
14349 // either they were declared at block scope or they are members of
14350 // one of the enclosing local classes.
14351 DC = Previous.getRepresentativeDecl()->getDeclContext();
14352 } else {
14353 // This is ill-formed, but provide the context that we would have
14354 // declared the function in, if we were permitted to, for error recovery.
14355 DC = FunctionContainingLocalClass;
14356 }
14357 adjustContextForLocalExternDecl(DC);
14358
14359 // C++ [class.friend]p6:
14360 // A function can be defined in a friend declaration of a class if and
14361 // only if the class is a non-local class (9.8), the function name is
14362 // unqualified, and the function has namespace scope.
14363 if (D.isFunctionDefinition()) {
14364 Diag(NameInfo.getBeginLoc(), diag::err_friend_def_in_local_class);
14365 }
14366
14367 // - There's no scope specifier, in which case we just go to the
14368 // appropriate scope and look for a function or function template
14369 // there as appropriate.
14370 } else if (SS.isInvalid() || !SS.isSet()) {
14371 // C++11 [namespace.memdef]p3:
14372 // If the name in a friend declaration is neither qualified nor
14373 // a template-id and the declaration is a function or an
14374 // elaborated-type-specifier, the lookup to determine whether
14375 // the entity has been previously declared shall not consider
14376 // any scopes outside the innermost enclosing namespace.
14377 bool isTemplateId =
14378 D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId;
14379
14380 // Find the appropriate context according to the above.
14381 DC = CurContext;
14382
14383 // Skip class contexts. If someone can cite chapter and verse
14384 // for this behavior, that would be nice --- it's what GCC and
14385 // EDG do, and it seems like a reasonable intent, but the spec
14386 // really only says that checks for unqualified existing
14387 // declarations should stop at the nearest enclosing namespace,
14388 // not that they should only consider the nearest enclosing
14389 // namespace.
14390 while (DC->isRecord())
14391 DC = DC->getParent();
14392
14393 DeclContext *LookupDC = DC;
14394 while (LookupDC->isTransparentContext())
14395 LookupDC = LookupDC->getParent();
14396
14397 while (true) {
14398 LookupQualifiedName(Previous, LookupDC);
14399
14400 if (!Previous.empty()) {
14401 DC = LookupDC;
14402 break;
14403 }
14404
14405 if (isTemplateId) {
14406 if (isa<TranslationUnitDecl>(LookupDC)) break;
14407 } else {
14408 if (LookupDC->isFileContext()) break;
14409 }
14410 LookupDC = LookupDC->getParent();
14411 }
14412
14413 DCScope = getScopeForDeclContext(S, DC);
14414
14415 // - There's a non-dependent scope specifier, in which case we
14416 // compute it and do a previous lookup there for a function
14417 // or function template.
14418 } else if (!SS.getScopeRep()->isDependent()) {
14419 DC = computeDeclContext(SS);
14420 if (!DC) return nullptr;
14421
14422 if (RequireCompleteDeclContext(SS, DC)) return nullptr;
14423
14424 LookupQualifiedName(Previous, DC);
14425
14426 // C++ [class.friend]p1: A friend of a class is a function or
14427 // class that is not a member of the class . . .
14428 if (DC->Equals(CurContext))
14429 Diag(DS.getFriendSpecLoc(),
14430 getLangOpts().CPlusPlus11 ?
14431 diag::warn_cxx98_compat_friend_is_member :
14432 diag::err_friend_is_member);
14433
14434 if (D.isFunctionDefinition()) {
14435 // C++ [class.friend]p6:
14436 // A function can be defined in a friend declaration of a class if and
14437 // only if the class is a non-local class (9.8), the function name is
14438 // unqualified, and the function has namespace scope.
14439 //
14440 // FIXME: We should only do this if the scope specifier names the
14441 // innermost enclosing namespace; otherwise the fixit changes the
14442 // meaning of the code.
14443 SemaDiagnosticBuilder DB
14444 = Diag(SS.getRange().getBegin(), diag::err_qualified_friend_def);
14445
14446 DB << SS.getScopeRep();
14447 if (DC->isFileContext())
14448 DB << FixItHint::CreateRemoval(SS.getRange());
14449 SS.clear();
14450 }
14451
14452 // - There's a scope specifier that does not match any template
14453 // parameter lists, in which case we use some arbitrary context,
14454 // create a method or method template, and wait for instantiation.
14455 // - There's a scope specifier that does match some template
14456 // parameter lists, which we don't handle right now.
14457 } else {
14458 if (D.isFunctionDefinition()) {
14459 // C++ [class.friend]p6:
14460 // A function can be defined in a friend declaration of a class if and
14461 // only if the class is a non-local class (9.8), the function name is
14462 // unqualified, and the function has namespace scope.
14463 Diag(SS.getRange().getBegin(), diag::err_qualified_friend_def)
14464 << SS.getScopeRep();
14465 }
14466
14467 DC = CurContext;
14468 assert(isa<CXXRecordDecl>(DC) && "friend declaration not in class?");
14469 }
14470
14471 if (!DC->isRecord()) {
14472 int DiagArg = -1;
14473 switch (D.getName().getKind()) {
14474 case UnqualifiedIdKind::IK_ConstructorTemplateId:
14475 case UnqualifiedIdKind::IK_ConstructorName:
14476 DiagArg = 0;
14477 break;
14478 case UnqualifiedIdKind::IK_DestructorName:
14479 DiagArg = 1;
14480 break;
14481 case UnqualifiedIdKind::IK_ConversionFunctionId:
14482 DiagArg = 2;
14483 break;
14484 case UnqualifiedIdKind::IK_DeductionGuideName:
14485 DiagArg = 3;
14486 break;
14487 case UnqualifiedIdKind::IK_Identifier:
14488 case UnqualifiedIdKind::IK_ImplicitSelfParam:
14489 case UnqualifiedIdKind::IK_LiteralOperatorId:
14490 case UnqualifiedIdKind::IK_OperatorFunctionId:
14491 case UnqualifiedIdKind::IK_TemplateId:
14492 break;
14493 }
14494 // This implies that it has to be an operator or function.
14495 if (DiagArg >= 0) {
14496 Diag(Loc, diag::err_introducing_special_friend) << DiagArg;
14497 return nullptr;
14498 }
14499 }
14500
14501 // FIXME: This is an egregious hack to cope with cases where the scope stack
14502 // does not contain the declaration context, i.e., in an out-of-line
14503 // definition of a class.
14504 Scope FakeDCScope(S, Scope::DeclScope, Diags);
14505 if (!DCScope) {
14506 FakeDCScope.setEntity(DC);
14507 DCScope = &FakeDCScope;
14508 }
14509
14510 bool AddToScope = true;
14511 NamedDecl *ND = ActOnFunctionDeclarator(DCScope, D, DC, TInfo, Previous,
14512 TemplateParams, AddToScope);
14513 if (!ND) return nullptr;
14514
14515 assert(ND->getLexicalDeclContext() == CurContext);
14516
14517 // If we performed typo correction, we might have added a scope specifier
14518 // and changed the decl context.
14519 DC = ND->getDeclContext();
14520
14521 // Add the function declaration to the appropriate lookup tables,
14522 // adjusting the redeclarations list as necessary. We don't
14523 // want to do this yet if the friending class is dependent.
14524 //
14525 // Also update the scope-based lookup if the target context's
14526 // lookup context is in lexical scope.
14527 if (!CurContext->isDependentContext()) {
14528 DC = DC->getRedeclContext();
14529 DC->makeDeclVisibleInContext(ND);
14530 if (Scope *EnclosingScope = getScopeForDeclContext(S, DC))
14531 PushOnScopeChains(ND, EnclosingScope, /*AddToContext=*/ false);
14532 }
14533
14534 FriendDecl *FrD = FriendDecl::Create(Context, CurContext,
14535 D.getIdentifierLoc(), ND,
14536 DS.getFriendSpecLoc());
14537 FrD->setAccess(AS_public);
14538 CurContext->addDecl(FrD);
14539
14540 if (ND->isInvalidDecl()) {
14541 FrD->setInvalidDecl();
14542 } else {
14543 if (DC->isRecord()) CheckFriendAccess(ND);
14544
14545 FunctionDecl *FD;
14546 if (FunctionTemplateDecl *FTD = dyn_cast<FunctionTemplateDecl>(ND))
14547 FD = FTD->getTemplatedDecl();
14548 else
14549 FD = cast<FunctionDecl>(ND);
14550
14551 // C++11 [dcl.fct.default]p4: If a friend declaration specifies a
14552 // default argument expression, that declaration shall be a definition
14553 // and shall be the only declaration of the function or function
14554 // template in the translation unit.
14555 if (functionDeclHasDefaultArgument(FD)) {
14556 // We can't look at FD->getPreviousDecl() because it may not have been set
14557 // if we're in a dependent context. If the function is known to be a
14558 // redeclaration, we will have narrowed Previous down to the right decl.
14559 if (D.isRedeclaration()) {
14560 Diag(FD->getLocation(), diag::err_friend_decl_with_def_arg_redeclared);
14561 Diag(Previous.getRepresentativeDecl()->getLocation(),
14562 diag::note_previous_declaration);
14563 } else if (!D.isFunctionDefinition())
14564 Diag(FD->getLocation(), diag::err_friend_decl_with_def_arg_must_be_def);
14565 }
14566
14567 // Mark templated-scope function declarations as unsupported.
14568 if (FD->getNumTemplateParameterLists() && SS.isValid()) {
14569 Diag(FD->getLocation(), diag::warn_template_qualified_friend_unsupported)
14570 << SS.getScopeRep() << SS.getRange()
14571 << cast<CXXRecordDecl>(CurContext);
14572 FrD->setUnsupportedFriend(true);
14573 }
14574 }
14575
14576 return ND;
14577 }
14578
14579 void Sema::SetDeclDeleted(Decl *Dcl, SourceLocation DelLoc) {
14580 AdjustDeclIfTemplate(Dcl);
14581
14582 FunctionDecl *Fn = dyn_cast_or_null<FunctionDecl>(Dcl);
14583 if (!Fn) {
14584 Diag(DelLoc, diag::err_deleted_non_function);
14585 return;
14586 }
14587
14588 // Deleted function does not have a body.
14589 Fn->setWillHaveBody(false);
14590
14591 if (const FunctionDecl *Prev = Fn->getPreviousDecl()) {
14592 // Don't consider the implicit declaration we generate for explicit
14593 // specializations. FIXME: Do not generate these implicit declarations.
14594 if ((Prev->getTemplateSpecializationKind() != TSK_ExplicitSpecialization ||
14595 Prev->getPreviousDecl()) &&
14596 !Prev->isDefined()) {
14597 Diag(DelLoc, diag::err_deleted_decl_not_first);
14598 Diag(Prev->getLocation().isInvalid() ? DelLoc : Prev->getLocation(),
14599 Prev->isImplicit() ? diag::note_previous_implicit_declaration
14600 : diag::note_previous_declaration);
14601 }
14602 // If the declaration wasn't the first, we delete the function anyway for
14603 // recovery.
14604 Fn = Fn->getCanonicalDecl();
14605 }
14606
14607 // dllimport/dllexport cannot be deleted.
14608 if (const InheritableAttr *DLLAttr = getDLLAttr(Fn)) {
14609 Diag(Fn->getLocation(), diag::err_attribute_dll_deleted) << DLLAttr;
14610 Fn->setInvalidDecl();
14611 }
14612
14613 if (Fn->isDeleted())
14614 return;
14615
14616 // See if we're deleting a function which is already known to override a
14617 // non-deleted virtual function.
14618 if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Fn)) {
14619 bool IssuedDiagnostic = false;
14620 for (const CXXMethodDecl *O : MD->overridden_methods()) {
14621 if (!(*MD->begin_overridden_methods())->isDeleted()) {
14622 if (!IssuedDiagnostic) {
14623 Diag(DelLoc, diag::err_deleted_override) << MD->getDeclName();
14624 IssuedDiagnostic = true;
14625 }
14626 Diag(O->getLocation(), diag::note_overridden_virtual_function);
14627 }
14628 }
14629 // If this function was implicitly deleted because it was defaulted,
14630 // explain why it was deleted.
14631 if (IssuedDiagnostic && MD->isDefaulted())
14632 ShouldDeleteSpecialMember(MD, getSpecialMember(MD), nullptr,
14633 /*Diagnose*/true);
14634 }
14635
14636 // C++11 [basic.start.main]p3:
14637 // A program that defines main as deleted [...] is ill-formed.
14638 if (Fn->isMain())
14639 Diag(DelLoc, diag::err_deleted_main);
14640
14641 // C++11 [dcl.fct.def.delete]p4:
14642 // A deleted function is implicitly inline.
14643 Fn->setImplicitlyInline();
14644 Fn->setDeletedAsWritten();
14645 }
14646
14647 void Sema::SetDeclDefaulted(Decl *Dcl, SourceLocation DefaultLoc) {
14648 CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(Dcl);
14649
14650 if (MD) {
14651 if (MD->getParent()->isDependentType()) {
14652 MD->setDefaulted();
14653 MD->setExplicitlyDefaulted();
14654 return;
14655 }
14656
14657 CXXSpecialMember Member = getSpecialMember(MD);
14658 if (Member == CXXInvalid) {
14659 if (!MD->isInvalidDecl())
14660 Diag(DefaultLoc, diag::err_default_special_members);
14661 return;
14662 }
14663
14664 MD->setDefaulted();
14665 MD->setExplicitlyDefaulted();
14666
14667 // Unset that we will have a body for this function. We might not,
14668 // if it turns out to be trivial, and we don't need this marking now
14669 // that we've marked it as defaulted.
14670 MD->setWillHaveBody(false);
14671
14672 // If this definition appears within the record, do the checking when
14673 // the record is complete.
14674 const FunctionDecl *Primary = MD;
14675 if (const FunctionDecl *Pattern = MD->getTemplateInstantiationPattern())
14676 // Ask the template instantiation pattern that actually had the
14677 // '= default' on it.
14678 Primary = Pattern;
14679
14680 // If the method was defaulted on its first declaration, we will have
14681 // already performed the checking in CheckCompletedCXXClass. Such a
14682 // declaration doesn't trigger an implicit definition.
14683 if (Primary->getCanonicalDecl()->isDefaulted())
14684 return;
14685
14686 CheckExplicitlyDefaultedSpecialMember(MD);
14687
14688 if (!MD->isInvalidDecl())
14689 DefineImplicitSpecialMember(*this, MD, DefaultLoc);
14690 } else {
14691 Diag(DefaultLoc, diag::err_default_special_members);
14692 }
14693 }
14694
14695 static void SearchForReturnInStmt(Sema &Self, Stmt *S) {
14696 for (Stmt *SubStmt : S->children()) {
14697 if (!SubStmt)
14698 continue;
14699 if (isa<ReturnStmt>(SubStmt))
14700 Self.Diag(SubStmt->getBeginLoc(),
14701 diag::err_return_in_constructor_handler);
14702 if (!isa<Expr>(SubStmt))
14703 SearchForReturnInStmt(Self, SubStmt);
14704 }
14705 }
14706
14707 void Sema::DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock) {
14708 for (unsigned I = 0, E = TryBlock->getNumHandlers(); I != E; ++I) {
14709 CXXCatchStmt *Handler = TryBlock->getHandler(I);
14710 SearchForReturnInStmt(*this, Handler);
14711 }
14712 }
14713
14714 bool Sema::CheckOverridingFunctionAttributes(const CXXMethodDecl *New,
14715 const CXXMethodDecl *Old) {
14716 const auto *NewFT = New->getType()->getAs<FunctionProtoType>();
14717 const auto *OldFT = Old->getType()->getAs<FunctionProtoType>();
14718
14719 if (OldFT->hasExtParameterInfos()) {
14720 for (unsigned I = 0, E = OldFT->getNumParams(); I != E; ++I)
14721 // A parameter of the overriding method should be annotated with noescape
14722 // if the corresponding parameter of the overridden method is annotated.
14723 if (OldFT->getExtParameterInfo(I).isNoEscape() &&
14724 !NewFT->getExtParameterInfo(I).isNoEscape()) {
14725 Diag(New->getParamDecl(I)->getLocation(),
14726 diag::warn_overriding_method_missing_noescape);
14727 Diag(Old->getParamDecl(I)->getLocation(),
14728 diag::note_overridden_marked_noescape);
14729 }
14730 }
14731
14732 // Virtual overrides must have the same code_seg.
14733 const auto *OldCSA = Old->getAttr<CodeSegAttr>();
14734 const auto *NewCSA = New->getAttr<CodeSegAttr>();
14735 if ((NewCSA || OldCSA) &&
14736 (!OldCSA || !NewCSA || NewCSA->getName() != OldCSA->getName())) {
14737 Diag(New->getLocation(), diag::err_mismatched_code_seg_override);
14738 Diag(Old->getLocation(), diag::note_previous_declaration);
14739 return true;
14740 }
14741
14742 CallingConv NewCC = NewFT->getCallConv(), OldCC = OldFT->getCallConv();
14743
14744 // If the calling conventions match, everything is fine
14745 if (NewCC == OldCC)
14746 return false;
14747
14748 // If the calling conventions mismatch because the new function is static,
14749 // suppress the calling convention mismatch error; the error about static
14750 // function override (err_static_overrides_virtual from
14751 // Sema::CheckFunctionDeclaration) is more clear.
14752 if (New->getStorageClass() == SC_Static)
14753 return false;
14754
14755 Diag(New->getLocation(),
14756 diag::err_conflicting_overriding_cc_attributes)
14757 << New->getDeclName() << New->getType() << Old->getType();
14758 Diag(Old->getLocation(), diag::note_overridden_virtual_function);
14759 return true;
14760 }
14761
14762 bool Sema::CheckOverridingFunctionReturnType(const CXXMethodDecl *New,
14763 const CXXMethodDecl *Old) {
14764 QualType NewTy = New->getType()->getAs<FunctionType>()->getReturnType();
14765 QualType OldTy = Old->getType()->getAs<FunctionType>()->getReturnType();
14766
14767 if (Context.hasSameType(NewTy, OldTy) ||
14768 NewTy->isDependentType() || OldTy->isDependentType())
14769 return false;
14770
14771 // Check if the return types are covariant
14772 QualType NewClassTy, OldClassTy;
14773
14774 /// Both types must be pointers or references to classes.
14775 if (const PointerType *NewPT = NewTy->getAs<PointerType>()) {
14776 if (const PointerType *OldPT = OldTy->getAs<PointerType>()) {
14777 NewClassTy = NewPT->getPointeeType();
14778 OldClassTy = OldPT->getPointeeType();
14779 }
14780 } else if (const ReferenceType *NewRT = NewTy->getAs<ReferenceType>()) {
14781 if (const ReferenceType *OldRT = OldTy->getAs<ReferenceType>()) {
14782 if (NewRT->getTypeClass() == OldRT->getTypeClass()) {
14783 NewClassTy = NewRT->getPointeeType();
14784 OldClassTy = OldRT->getPointeeType();
14785 }
14786 }
14787 }
14788
14789 // The return types aren't either both pointers or references to a class type.
14790 if (NewClassTy.isNull()) {
14791 Diag(New->getLocation(),
14792 diag::err_different_return_type_for_overriding_virtual_function)
14793 << New->getDeclName() << NewTy << OldTy
14794 << New->getReturnTypeSourceRange();
14795 Diag(Old->getLocation(), diag::note_overridden_virtual_function)
14796 << Old->getReturnTypeSourceRange();
14797
14798 return true;
14799 }
14800
14801 if (!Context.hasSameUnqualifiedType(NewClassTy, OldClassTy)) {
14802 // C++14 [class.virtual]p8:
14803 // If the class type in the covariant return type of D::f differs from
14804 // that of B::f, the class type in the return type of D::f shall be
14805 // complete at the point of declaration of D::f or shall be the class
14806 // type D.
14807 if (const RecordType *RT = NewClassTy->getAs<RecordType>()) {
14808 if (!RT->isBeingDefined() &&
14809 RequireCompleteType(New->getLocation(), NewClassTy,
14810 diag::err_covariant_return_incomplete,
14811 New->getDeclName()))
14812 return true;
14813 }
14814
14815 // Check if the new class derives from the old class.
14816 if (!IsDerivedFrom(New->getLocation(), NewClassTy, OldClassTy)) {
14817 Diag(New->getLocation(), diag::err_covariant_return_not_derived)
14818 << New->getDeclName() << NewTy << OldTy
14819 << New->getReturnTypeSourceRange();
14820 Diag(Old->getLocation(), diag::note_overridden_virtual_function)
14821 << Old->getReturnTypeSourceRange();
14822 return true;
14823 }
14824
14825 // Check if we the conversion from derived to base is valid.
14826 if (CheckDerivedToBaseConversion(
14827 NewClassTy, OldClassTy,
14828 diag::err_covariant_return_inaccessible_base,
14829 diag::err_covariant_return_ambiguous_derived_to_base_conv,
14830 New->getLocation(), New->getReturnTypeSourceRange(),
14831 New->getDeclName(), nullptr)) {
14832 // FIXME: this note won't trigger for delayed access control
14833 // diagnostics, and it's impossible to get an undelayed error
14834 // here from access control during the original parse because
14835 // the ParsingDeclSpec/ParsingDeclarator are still in scope.
14836 Diag(Old->getLocation(), diag::note_overridden_virtual_function)
14837 << Old->getReturnTypeSourceRange();
14838 return true;
14839 }
14840 }
14841
14842 // The qualifiers of the return types must be the same.
14843 if (NewTy.getLocalCVRQualifiers() != OldTy.getLocalCVRQualifiers()) {
14844 Diag(New->getLocation(),
14845 diag::err_covariant_return_type_different_qualifications)
14846 << New->getDeclName() << NewTy << OldTy
14847 << New->getReturnTypeSourceRange();
14848 Diag(Old->getLocation(), diag::note_overridden_virtual_function)
14849 << Old->getReturnTypeSourceRange();
14850 return true;
14851 }
14852
14853
14854 // The new class type must have the same or less qualifiers as the old type.
14855 if (NewClassTy.isMoreQualifiedThan(OldClassTy)) {
14856 Diag(New->getLocation(),
14857 diag::err_covariant_return_type_class_type_more_qualified)
14858 << New->getDeclName() << NewTy << OldTy
14859 << New->getReturnTypeSourceRange();
14860 Diag(Old->getLocation(), diag::note_overridden_virtual_function)
14861 << Old->getReturnTypeSourceRange();
14862 return true;
14863 }
14864
14865 return false;
14866 }
14867
14868 /// Mark the given method pure.
14869 ///
14870 /// \param Method the method to be marked pure.
14871 ///
14872 /// \param InitRange the source range that covers the "0" initializer.
14873 bool Sema::CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange) {
14874 SourceLocation EndLoc = InitRange.getEnd();
14875 if (EndLoc.isValid())
14876 Method->setRangeEnd(EndLoc);
14877
14878 if (Method->isVirtual() || Method->getParent()->isDependentContext()) {
14879 Method->setPure();
14880 return false;
14881 }
14882
14883 if (!Method->isInvalidDecl())
14884 Diag(Method->getLocation(), diag::err_non_virtual_pure)
14885 << Method->getDeclName() << InitRange;
14886 return true;
14887 }
14888
14889 void Sema::ActOnPureSpecifier(Decl *D, SourceLocation ZeroLoc) {
14890 if (D->getFriendObjectKind())
14891 Diag(D->getLocation(), diag::err_pure_friend);
14892 else if (auto *M = dyn_cast<CXXMethodDecl>(D))
14893 CheckPureMethod(M, ZeroLoc);
14894 else
14895 Diag(D->getLocation(), diag::err_illegal_initializer);
14896 }
14897
14898 /// Determine whether the given declaration is a global variable or
14899 /// static data member.
14900 static bool isNonlocalVariable(const Decl *D) {
14901 if (const VarDecl *Var = dyn_cast_or_null<VarDecl>(D))
14902 return Var->hasGlobalStorage();
14903
14904 return false;
14905 }
14906
14907 /// Invoked when we are about to parse an initializer for the declaration
14908 /// 'Dcl'.
14909 ///
14910 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a
14911 /// static data member of class X, names should be looked up in the scope of
14912 /// class X. If the declaration had a scope specifier, a scope will have
14913 /// been created and passed in for this purpose. Otherwise, S will be null.
14914 void Sema::ActOnCXXEnterDeclInitializer(Scope *S, Decl *D) {
14915 // If there is no declaration, there was an error parsing it.
14916 if (!D || D->isInvalidDecl())
14917 return;
14918
14919 // We will always have a nested name specifier here, but this declaration
14920 // might not be out of line if the specifier names the current namespace:
14921 // extern int n;
14922 // int ::n = 0;
14923 if (S && D->isOutOfLine())
14924 EnterDeclaratorContext(S, D->getDeclContext());
14925
14926 // If we are parsing the initializer for a static data member, push a
14927 // new expression evaluation context that is associated with this static
14928 // data member.
14929 if (isNonlocalVariable(D))
14930 PushExpressionEvaluationContext(
14931 ExpressionEvaluationContext::PotentiallyEvaluated, D);
14932 }
14933
14934 /// Invoked after we are finished parsing an initializer for the declaration D.
14935 void Sema::ActOnCXXExitDeclInitializer(Scope *S, Decl *D) {
14936 // If there is no declaration, there was an error parsing it.
14937 if (!D || D->isInvalidDecl())
14938 return;
14939
14940 if (isNonlocalVariable(D))
14941 PopExpressionEvaluationContext();
14942
14943 if (S && D->isOutOfLine())
14944 ExitDeclaratorContext(S);
14945 }
14946
14947 /// ActOnCXXConditionDeclarationExpr - Parsed a condition declaration of a
14948 /// C++ if/switch/while/for statement.
14949 /// e.g: "if (int x = f()) {...}"
14950 DeclResult Sema::ActOnCXXConditionDeclaration(Scope *S, Declarator &D) {
14951 // C++ 6.4p2:
14952 // The declarator shall not specify a function or an array.
14953 // The type-specifier-seq shall not contain typedef and shall not declare a
14954 // new class or enumeration.
14955 assert(D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef &&
14956 "Parser allowed 'typedef' as storage class of condition decl.");
14957
14958 Decl *Dcl = ActOnDeclarator(S, D);
14959 if (!Dcl)
14960 return true;
14961
14962 if (isa<FunctionDecl>(Dcl)) { // The declarator shall not specify a function.
14963 Diag(Dcl->getLocation(), diag::err_invalid_use_of_function_type)
14964 << D.getSourceRange();
14965 return true;
14966 }
14967
14968 return Dcl;
14969 }
14970
14971 void Sema::LoadExternalVTableUses() {
14972 if (!ExternalSource)
14973 return;
14974
14975 SmallVector<ExternalVTableUse, 4> VTables;
14976 ExternalSource->ReadUsedVTables(VTables);
14977 SmallVector<VTableUse, 4> NewUses;
14978 for (unsigned I = 0, N = VTables.size(); I != N; ++I) {
14979 llvm::DenseMap<CXXRecordDecl *, bool>::iterator Pos
14980 = VTablesUsed.find(VTables[I].Record);
14981 // Even if a definition wasn't required before, it may be required now.
14982 if (Pos != VTablesUsed.end()) {
14983 if (!Pos->second && VTables[I].DefinitionRequired)
14984 Pos->second = true;
14985 continue;
14986 }
14987
14988 VTablesUsed[VTables[I].Record] = VTables[I].DefinitionRequired;
14989 NewUses.push_back(VTableUse(VTables[I].Record, VTables[I].Location));
14990 }
14991
14992 VTableUses.insert(VTableUses.begin(), NewUses.begin(), NewUses.end());
14993 }
14994
14995 void Sema::MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class,
14996 bool DefinitionRequired) {
14997 // Ignore any vtable uses in unevaluated operands or for classes that do
14998 // not have a vtable.
14999 if (!Class->isDynamicClass() || Class->isDependentContext() ||
15000 CurContext->isDependentContext() || isUnevaluatedContext())
15001 return;
15002 // Do not mark as used if compiling for the device outside of the target
15003 // region.
15004 if (LangOpts.OpenMP && LangOpts.OpenMPIsDevice &&
15005 !isInOpenMPDeclareTargetContext() &&
15006 !isInOpenMPTargetExecutionDirective()) {
15007 if (!DefinitionRequired)
15008 MarkVirtualMembersReferenced(Loc, Class);
15009 return;
15010 }
15011
15012 // Try to insert this class into the map.
15013 LoadExternalVTableUses();
15014 Class = Class->getCanonicalDecl();
15015 std::pair<llvm::DenseMap<CXXRecordDecl *, bool>::iterator, bool>
15016 Pos = VTablesUsed.insert(std::make_pair(Class, DefinitionRequired));
15017 if (!Pos.second) {
15018 // If we already had an entry, check to see if we are promoting this vtable
15019 // to require a definition. If so, we need to reappend to the VTableUses
15020 // list, since we may have already processed the first entry.
15021 if (DefinitionRequired && !Pos.first->second) {
15022 Pos.first->second = true;
15023 } else {
15024 // Otherwise, we can early exit.
15025 return;
15026 }
15027 } else {
15028 // The Microsoft ABI requires that we perform the destructor body
15029 // checks (i.e. operator delete() lookup) when the vtable is marked used, as
15030 // the deleting destructor is emitted with the vtable, not with the
15031 // destructor definition as in the Itanium ABI.
15032 if (Context.getTargetInfo().getCXXABI().isMicrosoft()) {
15033 CXXDestructorDecl *DD = Class->getDestructor();
15034 if (DD && DD->isVirtual() && !DD->isDeleted()) {
15035 if (Class->hasUserDeclaredDestructor() && !DD->isDefined()) {
15036 // If this is an out-of-line declaration, marking it referenced will
15037 // not do anything. Manually call CheckDestructor to look up operator
15038 // delete().
15039 ContextRAII SavedContext(*this, DD);
15040 CheckDestructor(DD);
15041 } else {
15042 MarkFunctionReferenced(Loc, Class->getDestructor());
15043 }
15044 }
15045 }
15046 }
15047
15048 // Local classes need to have their virtual members marked
15049 // immediately. For all other classes, we mark their virtual members
15050 // at the end of the translation unit.
15051 if (Class->isLocalClass())
15052 MarkVirtualMembersReferenced(Loc, Class);
15053 else
15054 VTableUses.push_back(std::make_pair(Class, Loc));
15055 }
15056
15057 bool Sema::DefineUsedVTables() {
15058 LoadExternalVTableUses();
15059 if (VTableUses.empty())
15060 return false;
15061
15062 // Note: The VTableUses vector could grow as a result of marking
15063 // the members of a class as "used", so we check the size each
15064 // time through the loop and prefer indices (which are stable) to
15065 // iterators (which are not).
15066 bool DefinedAnything = false;
15067 for (unsigned I = 0; I != VTableUses.size(); ++I) {
15068 CXXRecordDecl *Class = VTableUses[I].first->getDefinition();
15069 if (!Class)
15070 continue;
15071 TemplateSpecializationKind ClassTSK =
15072 Class->getTemplateSpecializationKind();
15073
15074 SourceLocation Loc = VTableUses[I].second;
15075
15076 bool DefineVTable = true;
15077
15078 // If this class has a key function, but that key function is
15079 // defined in another translation unit, we don't need to emit the
15080 // vtable even though we're using it.
15081 const CXXMethodDecl *KeyFunction = Context.getCurrentKeyFunction(Class);
15082 if (KeyFunction && !KeyFunction->hasBody()) {
15083 // The key function is in another translation unit.
15084 DefineVTable = false;
15085 TemplateSpecializationKind TSK =
15086 KeyFunction->getTemplateSpecializationKind();
15087 assert(TSK != TSK_ExplicitInstantiationDefinition &&
15088 TSK != TSK_ImplicitInstantiation &&
15089 "Instantiations don't have key functions");
15090 (void)TSK;
15091 } else if (!KeyFunction) {
15092 // If we have a class with no key function that is the subject
15093 // of an explicit instantiation declaration, suppress the
15094 // vtable; it will live with the explicit instantiation
15095 // definition.
15096 bool IsExplicitInstantiationDeclaration =
15097 ClassTSK == TSK_ExplicitInstantiationDeclaration;
15098 for (auto R : Class->redecls()) {
15099 TemplateSpecializationKind TSK
15100 = cast<CXXRecordDecl>(R)->getTemplateSpecializationKind();
15101 if (TSK == TSK_ExplicitInstantiationDeclaration)
15102 IsExplicitInstantiationDeclaration = true;
15103 else if (TSK == TSK_ExplicitInstantiationDefinition) {
15104 IsExplicitInstantiationDeclaration = false;
15105 break;
15106 }
15107 }
15108
15109 if (IsExplicitInstantiationDeclaration)
15110 DefineVTable = false;
15111 }
15112
15113 // The exception specifications for all virtual members may be needed even
15114 // if we are not providing an authoritative form of the vtable in this TU.
15115 // We may choose to emit it available_externally anyway.
15116 if (!DefineVTable) {
15117 MarkVirtualMemberExceptionSpecsNeeded(Loc, Class);
15118 continue;
15119 }
15120
15121 // Mark all of the virtual members of this class as referenced, so
15122 // that we can build a vtable. Then, tell the AST consumer that a
15123 // vtable for this class is required.
15124 DefinedAnything = true;
15125 MarkVirtualMembersReferenced(Loc, Class);
15126 CXXRecordDecl *Canonical = Class->getCanonicalDecl();
15127 if (VTablesUsed[Canonical])
15128 Consumer.HandleVTable(Class);
15129
15130 // Warn if we're emitting a weak vtable. The vtable will be weak if there is
15131 // no key function or the key function is inlined. Don't warn in C++ ABIs
15132 // that lack key functions, since the user won't be able to make one.
15133 if (Context.getTargetInfo().getCXXABI().hasKeyFunctions() &&
15134 Class->isExternallyVisible() && ClassTSK != TSK_ImplicitInstantiation) {
15135 const FunctionDecl *KeyFunctionDef = nullptr;
15136 if (!KeyFunction || (KeyFunction->hasBody(KeyFunctionDef) &&
15137 KeyFunctionDef->isInlined())) {
15138 Diag(Class->getLocation(),
15139 ClassTSK == TSK_ExplicitInstantiationDefinition
15140 ? diag::warn_weak_template_vtable
15141 : diag::warn_weak_vtable)
15142 << Class;
15143 }
15144 }
15145 }
15146 VTableUses.clear();
15147
15148 return DefinedAnything;
15149 }
15150
15151 void Sema::MarkVirtualMemberExceptionSpecsNeeded(SourceLocation Loc,
15152 const CXXRecordDecl *RD) {
15153 for (const auto *I : RD->methods())
15154 if (I->isVirtual() && !I->isPure())
15155 ResolveExceptionSpec(Loc, I->getType()->castAs<FunctionProtoType>());
15156 }
15157
15158 void Sema::MarkVirtualMembersReferenced(SourceLocation Loc,
15159 const CXXRecordDecl *RD) {
15160 // Mark all functions which will appear in RD's vtable as used.
15161 CXXFinalOverriderMap FinalOverriders;
15162 RD->getFinalOverriders(FinalOverriders);
15163 for (CXXFinalOverriderMap::const_iterator I = FinalOverriders.begin(),
15164 E = FinalOverriders.end();
15165 I != E; ++I) {
15166 for (OverridingMethods::const_iterator OI = I->second.begin(),
15167 OE = I->second.end();
15168 OI != OE; ++OI) {
15169 assert(OI->second.size() > 0 && "no final overrider");
15170 CXXMethodDecl *Overrider = OI->second.front().Method;
15171
15172 // C++ [basic.def.odr]p2:
15173 // [...] A virtual member function is used if it is not pure. [...]
15174 if (!Overrider->isPure())
15175 MarkFunctionReferenced(Loc, Overrider);
15176 }
15177 }
15178
15179 // Only classes that have virtual bases need a VTT.
15180 if (RD->getNumVBases() == 0)
15181 return;
15182
15183 for (const auto &I : RD->bases()) {
15184 const CXXRecordDecl *Base =
15185 cast<CXXRecordDecl>(I.getType()->getAs<RecordType>()->getDecl());
15186 if (Base->getNumVBases() == 0)
15187 continue;
15188 MarkVirtualMembersReferenced(Loc, Base);
15189 }
15190 }
15191
15192 /// SetIvarInitializers - This routine builds initialization ASTs for the
15193 /// Objective-C implementation whose ivars need be initialized.
15194 void Sema::SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation) {
15195 if (!getLangOpts().CPlusPlus)
15196 return;
15197 if (ObjCInterfaceDecl *OID = ObjCImplementation->getClassInterface()) {
15198 SmallVector<ObjCIvarDecl*, 8> ivars;
15199 CollectIvarsToConstructOrDestruct(OID, ivars);
15200 if (ivars.empty())
15201 return;
15202 SmallVector<CXXCtorInitializer*, 32> AllToInit;
15203 for (unsigned i = 0; i < ivars.size(); i++) {
15204 FieldDecl *Field = ivars[i];
15205 if (Field->isInvalidDecl())
15206 continue;
15207
15208 CXXCtorInitializer *Member;
15209 InitializedEntity InitEntity = InitializedEntity::InitializeMember(Field);
15210 InitializationKind InitKind =
15211 InitializationKind::CreateDefault(ObjCImplementation->getLocation());
15212
15213 InitializationSequence InitSeq(*this, InitEntity, InitKind, None);
15214 ExprResult MemberInit =
15215 InitSeq.Perform(*this, InitEntity, InitKind, None);
15216 MemberInit = MaybeCreateExprWithCleanups(MemberInit);
15217 // Note, MemberInit could actually come back empty if no initialization
15218 // is required (e.g., because it would call a trivial default constructor)
15219 if (!MemberInit.get() || MemberInit.isInvalid())
15220 continue;
15221
15222 Member =
15223 new (Context) CXXCtorInitializer(Context, Field, SourceLocation(),
15224 SourceLocation(),
15225 MemberInit.getAs<Expr>(),
15226 SourceLocation());
15227 AllToInit.push_back(Member);
15228
15229 // Be sure that the destructor is accessible and is marked as referenced.
15230 if (const RecordType *RecordTy =
15231 Context.getBaseElementType(Field->getType())
15232 ->getAs<RecordType>()) {
15233 CXXRecordDecl *RD = cast<CXXRecordDecl>(RecordTy->getDecl());
15234 if (CXXDestructorDecl *Destructor = LookupDestructor(RD)) {
15235 MarkFunctionReferenced(Field->getLocation(), Destructor);
15236 CheckDestructorAccess(Field->getLocation(), Destructor,
15237 PDiag(diag::err_access_dtor_ivar)
15238 << Context.getBaseElementType(Field->getType()));
15239 }
15240 }
15241 }
15242 ObjCImplementation->setIvarInitializers(Context,
15243 AllToInit.data(), AllToInit.size());
15244 }
15245 }
15246
15247 static
15248 void DelegatingCycleHelper(CXXConstructorDecl* Ctor,
15249 llvm::SmallPtrSet<CXXConstructorDecl*, 4> &Valid,
15250 llvm::SmallPtrSet<CXXConstructorDecl*, 4> &Invalid,
15251 llvm::SmallPtrSet<CXXConstructorDecl*, 4> &Current,
15252 Sema &S) {
15253 if (Ctor->isInvalidDecl())
15254 return;
15255
15256 CXXConstructorDecl *Target = Ctor->getTargetConstructor();
15257
15258 // Target may not be determinable yet, for instance if this is a dependent
15259 // call in an uninstantiated template.
15260 if (Target) {
15261 const FunctionDecl *FNTarget = nullptr;
15262 (void)Target->hasBody(FNTarget);
15263 Target = const_cast<CXXConstructorDecl*>(
15264 cast_or_null<CXXConstructorDecl>(FNTarget));
15265 }
15266
15267 CXXConstructorDecl *Canonical = Ctor->getCanonicalDecl(),
15268 // Avoid dereferencing a null pointer here.
15269 *TCanonical = Target? Target->getCanonicalDecl() : nullptr;
15270
15271 if (!Current.insert(Canonical).second)
15272 return;
15273
15274 // We know that beyond here, we aren't chaining into a cycle.
15275 if (!Target || !Target->isDelegatingConstructor() ||
15276 Target->isInvalidDecl() || Valid.count(TCanonical)) {
15277 Valid.insert(Current.begin(), Current.end());
15278 Current.clear();
15279 // We've hit a cycle.
15280 } else if (TCanonical == Canonical || Invalid.count(TCanonical) ||
15281 Current.count(TCanonical)) {
15282 // If we haven't diagnosed this cycle yet, do so now.
15283 if (!Invalid.count(TCanonical)) {
15284 S.Diag((*Ctor->init_begin())->getSourceLocation(),
15285 diag::warn_delegating_ctor_cycle)
15286 << Ctor;
15287
15288 // Don't add a note for a function delegating directly to itself.
15289 if (TCanonical != Canonical)
15290 S.Diag(Target->getLocation(), diag::note_it_delegates_to);
15291
15292 CXXConstructorDecl *C = Target;
15293 while (C->getCanonicalDecl() != Canonical) {
15294 const FunctionDecl *FNTarget = nullptr;
15295 (void)C->getTargetConstructor()->hasBody(FNTarget);
15296 assert(FNTarget && "Ctor cycle through bodiless function");
15297
15298 C = const_cast<CXXConstructorDecl*>(
15299 cast<CXXConstructorDecl>(FNTarget));
15300 S.Diag(C->getLocation(), diag::note_which_delegates_to);
15301 }
15302 }
15303
15304 Invalid.insert(Current.begin(), Current.end());
15305 Current.clear();
15306 } else {
15307 DelegatingCycleHelper(Target, Valid, Invalid, Current, S);
15308 }
15309 }
15310
15311
15312 void Sema::CheckDelegatingCtorCycles() {
15313 llvm::SmallPtrSet<CXXConstructorDecl*, 4> Valid, Invalid, Current;
15314
15315 for (DelegatingCtorDeclsType::iterator
15316 I = DelegatingCtorDecls.begin(ExternalSource),
15317 E = DelegatingCtorDecls.end();
15318 I != E; ++I)
15319 DelegatingCycleHelper(*I, Valid, Invalid, Current, *this);
15320
15321 for (auto CI = Invalid.begin(), CE = Invalid.end(); CI != CE; ++CI)
15322 (*CI)->setInvalidDecl();
15323 }
15324
15325 namespace {
15326 /// AST visitor that finds references to the 'this' expression.
15327 class FindCXXThisExpr : public RecursiveASTVisitor<FindCXXThisExpr> {
15328 Sema &S;
15329
15330 public:
15331 explicit FindCXXThisExpr(Sema &S) : S(S) { }
15332
15333 bool VisitCXXThisExpr(CXXThisExpr *E) {
15334 S.Diag(E->getLocation(), diag::err_this_static_member_func)
15335 << E->isImplicit();
15336 return false;
15337 }
15338 };
15339 }
15340
15341 bool Sema::checkThisInStaticMemberFunctionType(CXXMethodDecl *Method) {
15342 TypeSourceInfo *TSInfo = Method->getTypeSourceInfo();
15343 if (!TSInfo)
15344 return false;
15345
15346 TypeLoc TL = TSInfo->getTypeLoc();
15347 FunctionProtoTypeLoc ProtoTL = TL.getAs<FunctionProtoTypeLoc>();
15348 if (!ProtoTL)
15349 return false;
15350
15351 // C++11 [expr.prim.general]p3:
15352 // [The expression this] shall not appear before the optional
15353 // cv-qualifier-seq and it shall not appear within the declaration of a
15354 // static member function (although its type and value category are defined
15355 // within a static member function as they are within a non-static member
15356 // function). [ Note: this is because declaration matching does not occur
15357 // until the complete declarator is known. - end note ]
15358 const FunctionProtoType *Proto = ProtoTL.getTypePtr();
15359 FindCXXThisExpr Finder(*this);
15360
15361 // If the return type came after the cv-qualifier-seq, check it now.
15362 if (Proto->hasTrailingReturn() &&
15363 !Finder.TraverseTypeLoc(ProtoTL.getReturnLoc()))
15364 return true;
15365
15366 // Check the exception specification.
15367 if (checkThisInStaticMemberFunctionExceptionSpec(Method))
15368 return true;
15369
15370 return checkThisInStaticMemberFunctionAttributes(Method);
15371 }
15372
15373 bool Sema::checkThisInStaticMemberFunctionExceptionSpec(CXXMethodDecl *Method) {
15374 TypeSourceInfo *TSInfo = Method->getTypeSourceInfo();
15375 if (!TSInfo)
15376 return false;
15377
15378 TypeLoc TL = TSInfo->getTypeLoc();
15379 FunctionProtoTypeLoc ProtoTL = TL.getAs<FunctionProtoTypeLoc>();
15380 if (!ProtoTL)
15381 return false;
15382
15383 const FunctionProtoType *Proto = ProtoTL.getTypePtr();
15384 FindCXXThisExpr Finder(*this);
15385
15386 switch (Proto->getExceptionSpecType()) {
15387 case EST_Unparsed:
15388 case EST_Uninstantiated:
15389 case EST_Unevaluated:
15390 case EST_BasicNoexcept:
15391 case EST_DynamicNone:
15392 case EST_MSAny:
15393 case EST_None:
15394 break;
15395
15396 case EST_DependentNoexcept:
15397 case EST_NoexceptFalse:
15398 case EST_NoexceptTrue:
15399 if (!Finder.TraverseStmt(Proto->getNoexceptExpr()))
15400 return true;
15401 LLVM_FALLTHROUGH;
15402
15403 case EST_Dynamic:
15404 for (const auto &E : Proto->exceptions()) {
15405 if (!Finder.TraverseType(E))
15406 return true;
15407 }
15408 break;
15409 }
15410
15411 return false;
15412 }
15413
15414 bool Sema::checkThisInStaticMemberFunctionAttributes(CXXMethodDecl *Method) {
15415 FindCXXThisExpr Finder(*this);
15416
15417 // Check attributes.
15418 for (const auto *A : Method->attrs()) {
15419 // FIXME: This should be emitted by tblgen.
15420 Expr *Arg = nullptr;
15421 ArrayRef<Expr *> Args;
15422 if (const auto *G = dyn_cast<GuardedByAttr>(A))
15423 Arg = G->getArg();
15424 else if (const auto *G = dyn_cast<PtGuardedByAttr>(A))
15425 Arg = G->getArg();
15426 else if (const auto *AA = dyn_cast<AcquiredAfterAttr>(A))
15427 Args = llvm::makeArrayRef(AA->args_begin(), AA->args_size());
15428 else if (const auto *AB = dyn_cast<AcquiredBeforeAttr>(A))
15429 Args = llvm::makeArrayRef(AB->args_begin(), AB->args_size());
15430 else if (const auto *ETLF = dyn_cast<ExclusiveTrylockFunctionAttr>(A)) {
15431 Arg = ETLF->getSuccessValue();
15432 Args = llvm::makeArrayRef(ETLF->args_begin(), ETLF->args_size());
15433 } else if (const auto *STLF = dyn_cast<SharedTrylockFunctionAttr>(A)) {
15434 Arg = STLF->getSuccessValue();
15435 Args = llvm::makeArrayRef(STLF->args_begin(), STLF->args_size());
15436 } else if (const auto *LR = dyn_cast<LockReturnedAttr>(A))
15437 Arg = LR->getArg();
15438 else if (const auto *LE = dyn_cast<LocksExcludedAttr>(A))
15439 Args = llvm::makeArrayRef(LE->args_begin(), LE->args_size());
15440 else if (const auto *RC = dyn_cast<RequiresCapabilityAttr>(A))
15441 Args = llvm::makeArrayRef(RC->args_begin(), RC->args_size());
15442 else if (const auto *AC = dyn_cast<AcquireCapabilityAttr>(A))
15443 Args = llvm::makeArrayRef(AC->args_begin(), AC->args_size());
15444 else if (const auto *AC = dyn_cast<TryAcquireCapabilityAttr>(A))
15445 Args = llvm::makeArrayRef(AC->args_begin(), AC->args_size());
15446 else if (const auto *RC = dyn_cast<ReleaseCapabilityAttr>(A))
15447 Args = llvm::makeArrayRef(RC->args_begin(), RC->args_size());
15448
15449 if (Arg && !Finder.TraverseStmt(Arg))
15450 return true;
15451
15452 for (unsigned I = 0, N = Args.size(); I != N; ++I) {
15453 if (!Finder.TraverseStmt(Args[I]))
15454 return true;
15455 }
15456 }
15457
15458 return false;
15459 }
15460
15461 void Sema::checkExceptionSpecification(
15462 bool IsTopLevel, ExceptionSpecificationType EST,
15463 ArrayRef<ParsedType> DynamicExceptions,
15464 ArrayRef<SourceRange> DynamicExceptionRanges, Expr *NoexceptExpr,
15465 SmallVectorImpl<QualType> &Exceptions,
15466 FunctionProtoType::ExceptionSpecInfo &ESI) {
15467 Exceptions.clear();
15468 ESI.Type = EST;
15469 if (EST == EST_Dynamic) {
15470 Exceptions.reserve(DynamicExceptions.size());
15471 for (unsigned ei = 0, ee = DynamicExceptions.size(); ei != ee; ++ei) {
15472 // FIXME: Preserve type source info.
15473 QualType ET = GetTypeFromParser(DynamicExceptions[ei]);
15474
15475 if (IsTopLevel) {
15476 SmallVector<UnexpandedParameterPack, 2> Unexpanded;
15477 collectUnexpandedParameterPacks(ET, Unexpanded);
15478 if (!Unexpanded.empty()) {
15479 DiagnoseUnexpandedParameterPacks(
15480 DynamicExceptionRanges[ei].getBegin(), UPPC_ExceptionType,
15481 Unexpanded);
15482 continue;
15483 }
15484 }
15485
15486 // Check that the type is valid for an exception spec, and
15487 // drop it if not.
15488 if (!CheckSpecifiedExceptionType(ET, DynamicExceptionRanges[ei]))
15489 Exceptions.push_back(ET);
15490 }
15491 ESI.Exceptions = Exceptions;
15492 return;
15493 }
15494
15495 if (isComputedNoexcept(EST)) {
15496 assert((NoexceptExpr->isTypeDependent() ||
15497 NoexceptExpr->getType()->getCanonicalTypeUnqualified() ==
15498 Context.BoolTy) &&
15499 "Parser should have made sure that the expression is boolean");
15500 if (IsTopLevel && DiagnoseUnexpandedParameterPack(NoexceptExpr)) {
15501 ESI.Type = EST_BasicNoexcept;
15502 return;
15503 }
15504
15505 ESI.NoexceptExpr = NoexceptExpr;
15506 return;
15507 }
15508 }
15509
15510 void Sema::actOnDelayedExceptionSpecification(Decl *MethodD,
15511 ExceptionSpecificationType EST,
15512 SourceRange SpecificationRange,
15513 ArrayRef<ParsedType> DynamicExceptions,
15514 ArrayRef<SourceRange> DynamicExceptionRanges,
15515 Expr *NoexceptExpr) {
15516 if (!MethodD)
15517 return;
15518
15519 // Dig out the method we're referring to.
15520 if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(MethodD))
15521 MethodD = FunTmpl->getTemplatedDecl();
15522
15523 CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(MethodD);
15524 if (!Method)
15525 return;
15526
15527 // Check the exception specification.
15528 llvm::SmallVector<QualType, 4> Exceptions;
15529 FunctionProtoType::ExceptionSpecInfo ESI;
15530 checkExceptionSpecification(/*IsTopLevel*/true, EST, DynamicExceptions,
15531 DynamicExceptionRanges, NoexceptExpr, Exceptions,
15532 ESI);
15533
15534 // Update the exception specification on the function type.
15535 Context.adjustExceptionSpec(Method, ESI, /*AsWritten*/true);
15536
15537 if (Method->isStatic())
15538 checkThisInStaticMemberFunctionExceptionSpec(Method);
15539
15540 if (Method->isVirtual()) {
15541 // Check overrides, which we previously had to delay.
15542 for (const CXXMethodDecl *O : Method->overridden_methods())
15543 CheckOverridingFunctionExceptionSpec(Method, O);
15544 }
15545 }
15546
15547 /// HandleMSProperty - Analyze a __delcspec(property) field of a C++ class.
15548 ///
15549 MSPropertyDecl *Sema::HandleMSProperty(Scope *S, RecordDecl *Record,
15550 SourceLocation DeclStart, Declarator &D,
15551 Expr *BitWidth,
15552 InClassInitStyle InitStyle,
15553 AccessSpecifier AS,
15554 const ParsedAttr &MSPropertyAttr) {
15555 IdentifierInfo *II = D.getIdentifier();
15556 if (!II) {
15557 Diag(DeclStart, diag::err_anonymous_property);
15558 return nullptr;
15559 }
15560 SourceLocation Loc = D.getIdentifierLoc();
15561
15562 TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S);
15563 QualType T = TInfo->getType();
15564 if (getLangOpts().CPlusPlus) {
15565 CheckExtraCXXDefaultArguments(D);
15566
15567 if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo,
15568 UPPC_DataMemberType)) {
15569 D.setInvalidType();
15570 T = Context.IntTy;
15571 TInfo = Context.getTrivialTypeSourceInfo(T, Loc);
15572 }
15573 }
15574
15575 DiagnoseFunctionSpecifiers(D.getDeclSpec());
15576
15577 if (D.getDeclSpec().isInlineSpecified())
15578 Diag(D.getDeclSpec().getInlineSpecLoc(), diag::err_inline_non_function)
15579 << getLangOpts().CPlusPlus17;
15580 if (DeclSpec::TSCS TSCS = D.getDeclSpec().getThreadStorageClassSpec())
15581 Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(),
15582 diag::err_invalid_thread)
15583 << DeclSpec::getSpecifierName(TSCS);
15584
15585 // Check to see if this name was declared as a member previously
15586 NamedDecl *PrevDecl = nullptr;
15587 LookupResult Previous(*this, II, Loc, LookupMemberName,
15588 ForVisibleRedeclaration);
15589 LookupName(Previous, S);
15590 switch (Previous.getResultKind()) {
15591 case LookupResult::Found:
15592 case LookupResult::FoundUnresolvedValue:
15593 PrevDecl = Previous.getAsSingle<NamedDecl>();
15594 break;
15595
15596 case LookupResult::FoundOverloaded:
15597 PrevDecl = Previous.getRepresentativeDecl();
15598 break;
15599
15600 case LookupResult::NotFound:
15601 case LookupResult::NotFoundInCurrentInstantiation:
15602 case LookupResult::Ambiguous:
15603 break;
15604 }
15605
15606 if (PrevDecl && PrevDecl->isTemplateParameter()) {
15607 // Maybe we will complain about the shadowed template parameter.
15608 DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl);
15609 // Just pretend that we didn't see the previous declaration.
15610 PrevDecl = nullptr;
15611 }
15612
15613 if (PrevDecl && !isDeclInScope(PrevDecl, Record, S))
15614 PrevDecl = nullptr;
15615
15616 SourceLocation TSSL = D.getBeginLoc();
15617 MSPropertyDecl *NewPD =
15618 MSPropertyDecl::Create(Context, Record, Loc, II, T, TInfo, TSSL,
15619 MSPropertyAttr.getPropertyDataGetter(),
15620 MSPropertyAttr.getPropertyDataSetter());
15621 ProcessDeclAttributes(TUScope, NewPD, D);
15622 NewPD->setAccess(AS);
15623
15624 if (NewPD->isInvalidDecl())
15625 Record->setInvalidDecl();
15626
15627 if (D.getDeclSpec().isModulePrivateSpecified())
15628 NewPD->setModulePrivate();
15629
15630 if (NewPD->isInvalidDecl() && PrevDecl) {
15631 // Don't introduce NewFD into scope; there's already something
15632 // with the same name in the same scope.
15633 } else if (II) {
15634 PushOnScopeChains(NewPD, S);
15635 } else
15636 Record->addDecl(NewPD);
15637
15638 return NewPD;
15639 }
clang::Sema::BuildStdInitializerList
QualType BuildStdInitializerList(QualType Element, SourceLocation Loc)
Looks for the std::initializer_list template and instantiates it with Element, or emits an error if i...
Definition: SemaDeclCXX.cpp:9272
clang::Sema::TypeDiagnoser
Abstract class used to diagnose incomplete types.
Definition: Sema.h:1510
clang::TST_decltype
Definition: Specifiers.h:74
clang::ComparisonCategoryInfo
Definition: ComparisonCategories.h:68
clang::CXXOperatorCallExpr
A call to an overloaded operator written using operator syntax.
Definition: ExprCXX.h:78
clang::CXXCtorInitializer::isBaseInitializer
bool isBaseInitializer() const
Determine whether this initializer is initializing a base class.
Definition: DeclCXX.h:2325
clang::DeclarationNameInfo::getLoc
SourceLocation getLoc() const
getLoc - Returns the main location of the declaration name.
Definition: DeclarationName.h:720
clang::NamespaceDecl::Create
static NamespaceDecl * Create(ASTContext &C, DeclContext *DC, bool Inline, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, NamespaceDecl *PrevDecl)
Definition: DeclCXX.cpp:2584
ParsedTemplate.h
clang::Sema::lookupStdExperimentalNamespace
NamespaceDecl * lookupStdExperimentalNamespace()
Definition: SemaDeclCXX.cpp:9017
clang::CXXCtorInitializer::setSourceOrder
void setSourceOrder(int Pos)
Set the source order of this initializer.
Definition: DeclCXX.h:2439
clang::Builtin::ID
ID
Definition: Builtins.h:49
ASTContext.h
Defines the clang::ASTContext interface.
clang::ASTContext::getAddrSpaceQualType
QualType getAddrSpaceQualType(QualType T, LangAS AddressSpace) const
Return the uniqued reference to the type for an address space qualified type with the specified type ...
Definition: ASTContext.cpp:2652
clang::Sema::ActOnFinishDelayedMemberInitializers
void ActOnFinishDelayedMemberInitializers(Decl *Record)
Definition: SemaDeclCXX.cpp:11036
clang::CXXDefaultInitExpr::Create
static CXXDefaultInitExpr * Create(const ASTContext &Ctx, SourceLocation Loc, FieldDecl *Field)
Field is the non-static data member whose default initializer is used by this expression.
Definition: ExprCXX.h:1152
clang::Sema::VariadicCallType
VariadicCallType
Definition: Sema.h:9462
clang::DeclRefExpr::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Expr.cpp:465
clang::CallExpr::isCallToStdMove
bool isCallToStdMove() const
Definition: Expr.h:2645
clang::ParmVarDecl::setScopeInfo
void setScopeInfo(unsigned scopeDepth, unsigned parameterIndex)
Definition: Decl.h:1583
AR_dependent
Definition: SemaAccess.cpp:34
collectUnexpandedParameterPacks
static void collectUnexpandedParameterPacks(Sema &S, TemplateParameterList *Params, SmallVectorImpl< UnexpandedParameterPack > &Unexpanded)
Definition: SemaTemplateInstantiateDecl.cpp:2372
clang::Sema::ActOnCondition
ConditionResult ActOnCondition(Scope *S, SourceLocation Loc, Expr *SubExpr, ConditionKind CK)
Definition: SemaExpr.cpp:16131
clang::UsingShadowDecl::getTargetDecl
NamedDecl * getTargetDecl() const
Gets the underlying declaration which has been brought into the local scope.
Definition: DeclCXX.h:3201
clang::CXXThisExpr::getBeginLoc
SourceLocation getBeginLoc() const
Definition: ExprCXX.h:994
clang::Sema::RequireNonAbstractType
bool RequireNonAbstractType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Definition: SemaDeclCXX.cpp:5296
clang::Decl::setImplicit
void setImplicit(bool I=true)
Definition: DeclBase.h:548
clang::FunctionDecl
Represents a function declaration or definition.
Definition: Decl.h:1738
buildSingleCopyAssignRecursively
static StmtResult buildSingleCopyAssignRecursively(Sema &S, SourceLocation Loc, QualType T, const ExprBuilder &To, const ExprBuilder &From, bool CopyingBaseSubobject, bool Copying, unsigned Depth=0)
Builds a statement that copies/moves the given entity from From to To.
Definition: SemaDeclCXX.cpp:11590
clang::TargetInfo::CCK_ClangABI4OrPS4
Definition: TargetInfo.h:1256
clang::LookupResult::FoundOverloaded
Name lookup found a set of overloaded functions that met the criteria.
Definition: Lookup.h:64
clang::Sema::getStdNamespace
NamespaceDecl * getStdNamespace() const
Definition: SemaDeclCXX.cpp:9012
clang::Declarator::getFunctionTypeInfo
DeclaratorChunk::FunctionTypeInfo & getFunctionTypeInfo()
getFunctionTypeInfo - Retrieves the function type info object (looking through parentheses).
Definition: DeclSpec.h:2268
Diag
static DiagnosticBuilder Diag(DiagnosticsEngine *Diags, const LangOptions &Features, FullSourceLoc TokLoc, const char *TokBegin, const char *TokRangeBegin, const char *TokRangeEnd, unsigned DiagID)
Produce a diagnostic highlighting some portion of a literal.
Definition: LiteralSupport.cpp:78
clang::CXXCtorInitializer::getInit
Expr * getInit() const
Get the initializer.
Definition: DeclCXX.h:2454
clang::DeclaratorChunk::FunctionTypeInfo::RefQualifierIsLValueRef
unsigned RefQualifierIsLValueRef
Whether the ref-qualifier (if any) is an lvalue reference.
Definition: DeclSpec.h:1265
clang::Sema::CheckConstructor
void CheckConstructor(CXXConstructorDecl *Constructor)
CheckConstructor - Checks a fully-formed constructor for well-formedness, issuing any diagnostics req...
Definition: SemaDeclCXX.cpp:8219
clang::CXXBasePaths::setOrigin
void setOrigin(CXXRecordDecl *Rec)
Definition: CXXInheritance.h:230
clang::Sema::SpecialMemberOverloadResult::getMethod
CXXMethodDecl * getMethod() const
Definition: Sema.h:1079
clang::EST_None
no exception specification
Definition: ExceptionSpecificationType.h:22
checkMemberDecomposition
static bool checkMemberDecomposition(Sema &S, ArrayRef< BindingDecl *> Bindings, ValueDecl *Src, QualType DecompType, const CXXRecordDecl *OrigRD)
Definition: SemaDeclCXX.cpp:1301
clang::InheritingConcreteTypeLoc::getTypePtr
const TypeClass * getTypePtr() const
Definition: TypeLoc.h:496
clang::OpaquePtr::get
PtrTy get() const
Definition: Ownership.h:81
clang::if
if(T->getSizeExpr()) TRY_TO(TraverseStmt(T -> getSizeExpr()))
clang::PointerType
PointerType - C99 6.7.5.1 - Pointer Declarators.
Definition: Type.h:2537
clang::EvaluatedExprVisitor
EvaluatedExprVisitor - This class visits &#39;Expr *&#39;s.
Definition: EvaluatedExprVisitor.h:112
clang::ASTContext::VoidPtrTy
CanQualType VoidPtrTy
Definition: ASTContext.h:1044
clang::PointerType::getPointeeType
QualType getPointeeType() const
Definition: Type.h:2550
clang::ComparisonCategoryInfo::ValueInfo
Definition: ComparisonCategories.h:77
clang::Sema::CXXInvalid
Definition: Sema.h:1174
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:638
clang::Sema::Consumer
ASTConsumer & Consumer
Definition: Sema.h:325
clang::TypoCorrection
Simple class containing the result of Sema::CorrectTypo.
Definition: TypoCorrection.h:43
clang::QualType::isPODType
bool isPODType(const ASTContext &Context) const
Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10).
Definition: Type.cpp:2101
clang::CXXRecordDecl::bases
base_class_range bases()
Definition: DeclCXX.h:823
clang::Type::isArrayType
bool isArrayType() const
Definition: Type.h:6345
clang::NestedNameSpecifierLocBuilder::MakeTrivial
void MakeTrivial(ASTContext &Context, NestedNameSpecifier *Qualifier, SourceRange R)
Make a new nested-name-specifier from incomplete source-location information.
Definition: NestedNameSpecifier.cpp:640
clang::MemberExpr::getMemberDecl
ValueDecl * getMemberDecl() const
Retrieve the member declaration to which this expression refers.
Definition: Expr.h:2773
clang::AtomicTypeLoc
Definition: TypeLoc.h:2205
clang::FunctionDecl::isOverloadedOperator
bool isOverloadedOperator() const
Whether this function declaration represents an C++ overloaded operator, e.g., "operator+".
Definition: Decl.h:2376
clang::CallExpr::getArg
Expr * getArg(unsigned Arg)
getArg - Return the specified argument.
Definition: Expr.h:2553
clang::CXXRecordDecl::getNumBases
unsigned getNumBases() const
Retrieves the number of base classes of this class.
Definition: DeclCXX.h:817
clang::Preprocessor::getIdentifierInfo
IdentifierInfo * getIdentifierInfo(StringRef Name) const
Return information about the specified preprocessor identifier token.
Definition: Preprocessor.h:1066
clang::UnqualifiedId::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
Return the source range that covers this unqualified-id.
Definition: DeclSpec.h:1134
clang::FunctionDecl::isExternC
bool isExternC() const
Determines whether this function is a function with external, C linkage.
Definition: Decl.cpp:2902
clang::Sema::ActOnFinishNamespaceDef
void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace)
ActOnFinishNamespaceDef - This callback is called after a namespace is exited.
Definition: SemaDeclCXX.cpp:8994
clang::LambdaExpr::capture_end
capture_iterator capture_end() const
Retrieve an iterator pointing past the end of the sequence of lambda captures.
Definition: ExprCXX.cpp:1162
clang::EST_Unparsed
not parsed yet
Definition: ExceptionSpecificationType.h:32
clang::Sema::ActOnIntegerConstant
ExprResult ActOnIntegerConstant(SourceLocation Loc, uint64_t Val)
Definition: SemaExpr.cpp:3197
clang::UnqualifiedId::StartLocation
SourceLocation StartLocation
The location of the first token that describes this unqualified-id, which will be the location of the...
Definition: DeclSpec.h:992
clang::ASTContext::NumImplicitMoveAssignmentOperatorsDeclared
static unsigned NumImplicitMoveAssignmentOperatorsDeclared
The number of implicitly-declared move assignment operators for which declarations were built...
Definition: ASTContext.h:2820
clang::NestedNameSpecifierLoc::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
Retrieve the source range covering the entirety of this nested-name-specifier.
Definition: NestedNameSpecifier.cpp:422
clang::Declarator::getTypeObject
const DeclaratorChunk & getTypeObject(unsigned i) const
Return the specified TypeInfo from this declarator.
Definition: DeclSpec.h:2179
clang::TypeAliasTemplateDecl::Create
static TypeAliasTemplateDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation L, DeclarationName Name, TemplateParameterList *Params, NamedDecl *Decl)
Create a function template node.
Definition: DeclTemplate.cpp:906
clang::DeclSpec::SetTypeQual
bool SetTypeQual(TQ T, SourceLocation Loc)
Definition: DeclSpec.cpp:891
clang::Sema::LookupOrdinaryName
Ordinary name lookup, which finds ordinary names (functions, variables, typedefs, etc...
Definition: Sema.h:3055
clang::FunctionDecl::willHaveBody
bool willHaveBody() const
True if this function will eventually have a body, once it&#39;s fully parsed.
Definition: Decl.h:2221
clang::DeclarationNameTable::getCXXConstructorName
DeclarationName getCXXConstructorName(CanQualType Ty)
Returns the name of a C++ constructor for the given Type.
Definition: DeclarationName.cpp:304
findTrivialSpecialMember
static bool findTrivialSpecialMember(Sema &S, CXXRecordDecl *RD, Sema::CXXSpecialMember CSM, unsigned Quals, bool ConstRHS, Sema::TrivialABIHandling TAH, CXXMethodDecl **Selected)
Perform lookup for a special member of the specified kind, and determine whether it is trivial...
Definition: SemaDeclCXX.cpp:7319
findDecomposableBaseClass
static DeclAccessPair findDecomposableBaseClass(Sema &S, SourceLocation Loc, const CXXRecordDecl *RD, CXXCastPath &BasePath)
Find the base class to decompose in a built-in decomposition of a class type.
Definition: SemaDeclCXX.cpp:1230
clang::FieldDecl::getInClassInitStyle
InClassInitStyle getInClassInitStyle() const
Get the kind of (C++11) default member initializer that this field has.
Definition: Decl.h:2707
clang::InitListExpr::getInit
const Expr * getInit(unsigned Init) const
Definition: Expr.h:4233
clang::ASTContext::Char32Ty
CanQualType Char32Ty
Definition: ASTContext.h:1024
TSK_BaseClass
The subobject is a base class.
Definition: SemaDeclCXX.cpp:7466
clang::LookupResult::setLookupName
void setLookupName(DeclarationName Name)
Sets the name to look up.
Definition: Lookup.h:246
clang::Sema::LookupName
bool LookupName(LookupResult &R, Scope *S, bool AllowBuiltinCreation=false)
Perform unqualified name lookup starting from a given scope.
Definition: SemaLookup.cpp:1734
clang::UsingPackDecl::Create
static UsingPackDecl * Create(ASTContext &C, DeclContext *DC, NamedDecl *InstantiatedFrom, ArrayRef< NamedDecl *> UsingDecls)
Definition: DeclCXX.cpp:2763
clang::ASTContext::NumImplicitDefaultConstructors
static unsigned NumImplicitDefaultConstructors
The number of implicitly-declared default constructors.
Definition: ASTContext.h:2788
clang::TypeLoc::getNextTypeLoc
TypeLoc getNextTypeLoc() const
Get the next TypeLoc pointed by this TypeLoc, e.g for "int*" the TypeLoc is a PointerLoc and next Typ...
Definition: TypeLoc.h:168
clang::Sema::CodeSynthesisContext::Entity
Decl * Entity
The entity that is being synthesized.
Definition: Sema.h:7238
clang::PseudoObjectExpr::semantics_iterator
Expr *const * semantics_iterator
Definition: Expr.h:5365
LookupStdInitializerList
static ClassTemplateDecl * LookupStdInitializerList(Sema &S, SourceLocation Loc)
Definition: SemaDeclCXX.cpp:9238
clang::Stmt
Stmt - This represents one statement.
Definition: Stmt.h:66
clang::UnqualifiedId::Identifier
IdentifierInfo * Identifier
When Kind == IK_Identifier, the parsed identifier, or when Kind == IK_UserLiteralId, the identifier suffix.
Definition: DeclSpec.h:962
clang::Sema::getCurrentClass
CXXRecordDecl * getCurrentClass(Scope *S, const CXXScopeSpec *SS)
Get the class that is directly named by the current context.
Definition: SemaDeclCXX.cpp:2104
clang::LookupResult::makeFilter
Filter makeFilter()
Create a filter for this result set.
Definition: Lookup.h:671
clang::Sema::CXXDestructor
Definition: Sema.h:1173
ErrorKind
ErrorKind
Definition: NullabilityChecker.cpp:71
clang::Redeclarable::setPreviousDecl
void setPreviousDecl(decl_type *PrevDecl)
Set the previous declaration.
Definition: Decl.h:4289
clang::FunctionType
FunctionType - C99 6.7.5.3 - Function Declarators.
Definition: Type.h:3355
clang::CXXTryStmt::getHandler
CXXCatchStmt * getHandler(unsigned i)
Definition: StmtCXX.h:104
clang::IfStmt
IfStmt - This represents an if/then/else.
Definition: Stmt.h:1687
EvaluatedExprVisitor.h
clang::Type::getPointeeType
QualType getPointeeType() const
If this is a pointer, ObjC object pointer, or block pointer, this returns the respective pointee...
Definition: Type.cpp:505
clang::FunctionDecl::isMain
bool isMain() const
Determines whether this function is "main", which is the entry point into an executable program...
Definition: Decl.cpp:2760
clang::TargetInfo::getTriple
const llvm::Triple & getTriple() const
Returns the target triple of the primary target.
Definition: TargetInfo.h:953
clang::FunctionProtoType::hasExtParameterInfos
bool hasExtParameterInfos() const
Is there any interesting extra information for any of the parameters of this function type...
Definition: Type.h:4059
clang::Sema::CheckImplicitSpecialMemberDeclaration
void CheckImplicitSpecialMemberDeclaration(Scope *S, FunctionDecl *FD)
Check a completed declaration of an implicit special member.
Definition: SemaDeclCXX.cpp:10902
clang::Type::isElaboratedTypeSpecifier
bool isElaboratedTypeSpecifier() const
Determine wither this type is a C++ elaborated-type-specifier.
Definition: Type.cpp:2631
clang::EnumConstantDecl
An instance of this object exists for each enum constant that is defined.
Definition: Decl.h:2786
clang::Type::isRealFloatingType
bool isRealFloatingType() const
Floating point categories.
Definition: Type.cpp:1937
clang::DeclSpec::SCS_unspecified
Definition: DeclSpec.h:233
clang::CXXRecordDecl::getNumVBases
unsigned getNumVBases() const
Retrieves the number of virtual base classes of this class.
Definition: DeclCXX.h:838
clang::VarDecl::getStorageClass
StorageClass getStorageClass() const
Returns the storage class as written in the source.
Definition: Decl.h:1020
clang::ElaboratedTypeLoc
Definition: TypeLoc.h:1934
Base
clang::Sema::ActOnStartDelayedCXXMethodDeclaration
void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method)
ActOnStartDelayedCXXMethodDeclaration - We have completed parsing a top-level (non-nested) C++ class...
Definition: SemaDeclCXX.cpp:8093
clang::CharSourceRange::getTokenRange
static CharSourceRange getTokenRange(SourceRange R)
Definition: SourceLocation.h:244
clang::QualType::addConst
void addConst()
Add the const type qualifier to this QualType.
Definition: Type.h:807
clang::FunctionDecl::isConstexpr
bool isConstexpr() const
Whether this is a (C++11) constexpr function or constexpr constructor.
Definition: Decl.h:2094
clang::ASTContext::NumImplicitMoveAssignmentOperators
static unsigned NumImplicitMoveAssignmentOperators
The number of implicitly-declared move assignment operators.
Definition: ASTContext.h:2816
clang::Sema::ActOnUsingDirective
Decl * ActOnUsingDirective(Scope *CurScope, SourceLocation UsingLoc, SourceLocation NamespcLoc, CXXScopeSpec &SS, SourceLocation IdentLoc, IdentifierInfo *NamespcName, const ParsedAttributesView &AttrList)
Definition: SemaDeclCXX.cpp:9359
clang::StringLiteral::isAscii
bool isAscii() const
Definition: Expr.h:1685
clang::Type::isRecordType
bool isRecordType() const
Definition: Type.h:6369
getTrivialTypeTemplateArgument
static TemplateArgumentLoc getTrivialTypeTemplateArgument(Sema &S, SourceLocation Loc, QualType T)
Definition: SemaDeclCXX.cpp:995
clang::MemberExpr::getBase
Expr * getBase() const
Definition: Expr.h:2767
clang::CXXScopeSpec::isEmpty
bool isEmpty() const
No scope specifier.
Definition: DeclSpec.h:189
clang::Sema::ActOnCXXConditionDeclaration
DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D)
ActOnCXXConditionDeclarationExpr - Parsed a condition declaration of a C++ if/switch/while/for statem...
Definition: SemaDeclCXX.cpp:14950
clang::LookupResult::Filter::erase
void erase()
Erase the last element returned from this iterator.
Definition: Lookup.h:643
clang::InitializedEntity::InitializeMember
static InitializedEntity InitializeMember(FieldDecl *Member, const InitializedEntity *Parent=nullptr, bool Implicit=false)
Create the initialization entity for a member subobject.
Definition: Initialization.h:357
getTemplateSpecializationKind
static TemplateSpecializationKind getTemplateSpecializationKind(Decl *D)
Determine what kind of template specialization the given declaration is.
Definition: SemaTemplate.cpp:7190
clang::Sema::BuildUsingDeclaration
NamedDecl * BuildUsingDeclaration(Scope *S, AccessSpecifier AS, SourceLocation UsingLoc, bool HasTypenameKeyword, SourceLocation TypenameLoc, CXXScopeSpec &SS, DeclarationNameInfo NameInfo, SourceLocation EllipsisLoc, const ParsedAttributesView &AttrList, bool IsInstantiation)
Builds a using declaration.
Definition: SemaDeclCXX.cpp:9916
clang::InitializedEntity::InitializeParameter
static InitializedEntity InitializeParameter(ASTContext &Context, const ParmVarDecl *Parm)
Create the initialization entity for a parameter.
Definition: Initialization.h:249
clang::Sema::MarkVirtualMemberExceptionSpecsNeeded
void MarkVirtualMemberExceptionSpecsNeeded(SourceLocation Loc, const CXXRecordDecl *RD)
Mark the exception specifications of all virtual member functions in the given class as needed...
Definition: SemaDeclCXX.cpp:15151
clang::ASTContext::getQualifiedType
QualType getQualifiedType(SplitQualType split) const
Un-split a SplitQualType.
Definition: ASTContext.h:1933
clang::ASTContext::getLValueReferenceType
QualType getLValueReferenceType(QualType T, bool SpelledAsLValue=true) const
Return the uniqued reference to the type for an lvalue reference to the specified type...
Definition: ASTContext.cpp:2967
clang::TypeDecl::getTypeForDecl
const Type * getTypeForDecl() const
Definition: Decl.h:2898
clang::CXXRecordDecl::hasIrrelevantDestructor
bool hasIrrelevantDestructor() const
Determine whether this class has a destructor which has no semantic effect.
Definition: DeclCXX.h:1514
clang::Sema::Diag
SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Emit a diagnostic.
Definition: Sema.h:1308
clang::Decl
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
clang::FunctionDecl::setRangeEnd
void setRangeEnd(SourceLocation E)
Definition: Decl.h:1908
clang::DeclaratorContext::MemberContext
clang::FunctionProtoType::isVariadic
bool isVariadic() const
Whether this function prototype is variadic.
Definition: Type.h:4002
clang::CXXRecordDecl::needsOverloadResolutionForDestructor
bool needsOverloadResolutionForDestructor() const
Determine whether we need to eagerly declare a destructor for this class.
Definition: DeclCXX.h:1191
clang::Sema::BuildCallToMemberFunction
ExprResult BuildCallToMemberFunction(Scope *S, Expr *MemExpr, SourceLocation LParenLoc, MultiExprArg Args, SourceLocation RParenLoc)
BuildCallToMemberFunction - Build a call to a member function.
Definition: SemaOverload.cpp:12848
clang::Decl::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclBase.h:410
clang::DeclSpec::SCS_mutable
Definition: DeclSpec.h:240
clang::PartialDiagnostic
Definition: PartialDiagnostic.h:35
clang::CXXMethodDecl::isVirtual
bool isVirtual() const
Definition: DeclCXX.h:2086
FindBaseInitializer
static bool FindBaseInitializer(Sema &SemaRef, CXXRecordDecl *ClassDecl, QualType BaseType, const CXXBaseSpecifier *&DirectBaseSpec, const CXXBaseSpecifier *&VirtualBaseSpec)
Find the direct and/or virtual base specifiers that correspond to the given base type, for use in base initialization within a constructor.
Definition: SemaDeclCXX.cpp:3703
clang::RecordDecl::setArgPassingRestrictions
void setArgPassingRestrictions(ArgPassingKind Kind)
Definition: Decl.h:3727
clang::ComparisonCategoryInfo::Kind
ComparisonCategoryType Kind
The Kind of the comparison category type.
Definition: ComparisonCategories.h:115
clang::CXXBaseSpecifier::isVirtual
bool isVirtual() const
Determines whether the base class is a virtual base class (or not).
Definition: DeclCXX.h:245
clang::VarDecl::getTSCSpec
ThreadStorageClassSpecifier getTSCSpec() const
Definition: Decl.h:1029
clang::Sema::IsOverload
bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl, bool ConsiderCudaAttrs=true)
Definition: SemaOverload.cpp:1077
clang::BinaryOperator::getOpcode
Opcode getOpcode() const
Definition: Expr.h:3322
P
StringRef P
Definition: ASTMatchersInternal.cpp:439
clang::Scope::isTemplateParamScope
bool isTemplateParamScope() const
isTemplateParamScope - Return true if this scope is a C++ template parameter scope.
Definition: Scope.h:376
clang::Sema::TUScope
Scope * TUScope
Translation Unit Scope - useful to Objective-C actions that need to lookup file scope declarations in...
Definition: Sema.h:828
clang::FunctionDecl::setPure
void setPure(bool P=true)
Definition: Decl.cpp:2747
RemoveAddressSpaceFromPtr
static QualType RemoveAddressSpaceFromPtr(Sema &SemaRef, const PointerType *PtrTy)
Definition: SemaDeclCXX.cpp:13152
clang::Sema::MarkVirtualMembersReferenced
void MarkVirtualMembersReferenced(SourceLocation Loc, const CXXRecordDecl *RD)
MarkVirtualMembersReferenced - Will mark all members of the given CXXRecordDecl referenced.
Definition: SemaDeclCXX.cpp:15158
clang::VirtSpecifiers::isOverrideSpecified
bool isOverrideSpecified() const
Definition: DeclSpec.h:2517
clang::Decl::FOK_None
Not a friend object.
Definition: DeclBase.h:1095
clang::Decl::getPreviousDecl
Decl * getPreviousDecl()
Retrieve the previous declaration that declares the same entity as this declaration, or NULL if there is no previous declaration.
Definition: DeclBase.h:953
clang::DeclAccessPair::getDecl
NamedDecl * getDecl() const
Definition: DeclAccessPair.h:42
clang::QualType::getNonReferenceType
QualType getNonReferenceType() const
If Type is a reference type (e.g., const int&), returns the type that the reference refers to ("const...
Definition: Type.h:6245
clang::Scope::AddDecl
void AddDecl(Decl *D)
Definition: Scope.h:287
isVirtualDirectBase
static bool isVirtualDirectBase(CXXRecordDecl *Derived, CXXRecordDecl *Base)
Determine whether a direct base class is a virtual base class.
Definition: SemaDeclCXX.cpp:9715
clang::Sema::EvaluateImplicitExceptionSpec
void EvaluateImplicitExceptionSpec(SourceLocation Loc, CXXMethodDecl *MD)
Evaluate the implicit exception specification for a defaulted special member function.
Definition: SemaDeclCXX.cpp:6477
clang::UnqualifiedIdKind::IK_ConstructorTemplateId
A constructor named via a template-id.
clang::ClassTemplateSpecializationDecl::isExplicitSpecialization
bool isExplicitSpecialization() const
Definition: DeclTemplate.h:1746
clang::InitializationKind::CreateDirect
static InitializationKind CreateDirect(SourceLocation InitLoc, SourceLocation LParenLoc, SourceLocation RParenLoc)
Create a direct initialization.
Definition: Initialization.h:601
clang::Sema::CreateBuiltinArraySubscriptExpr
ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, Expr *Idx, SourceLocation RLoc)
Definition: SemaExpr.cpp:4487
clang::FieldDecl::getParent
const RecordDecl * getParent() const
Returns the parent of this field declaration, which is the struct in which this field is defined...
Definition: Decl.h:2763
lookupStdTypeTraitMember
static bool lookupStdTypeTraitMember(Sema &S, LookupResult &TraitMemberLookup, SourceLocation Loc, StringRef Trait, TemplateArgumentListInfo &Args, unsigned DiagID)
Definition: SemaDeclCXX.cpp:930
clang::TypeWithKeyword::getKeywordForTagTypeKind
static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag)
Converts a TagTypeKind into an elaborated type keyword.
Definition: Type.cpp:2540
clang::Type
The base class of the type hierarchy.
Definition: Type.h:1407
checkTrivialSubobjectCall
static bool checkTrivialSubobjectCall(Sema &S, SourceLocation SubobjLoc, QualType SubType, bool ConstRHS, Sema::CXXSpecialMember CSM, TrivialSubobjectKind Kind, Sema::TrivialABIHandling TAH, bool Diagnose)
Check whether the special member selected for a given type would be trivial.
Definition: SemaDeclCXX.cpp:7474
clang::DeclarationNameInfo::getBeginLoc
SourceLocation getBeginLoc() const
getBeginLoc - Retrieve the location of the first token.
Definition: DeclarationName.h:799
clang::CanQual::getUnqualifiedType
CanQual< T > getUnqualifiedType() const
Retrieve the unqualified form of this type.
Definition: CanonicalType.h:619
clang::Sema::ActOnFinishDelayedCXXMethodDeclaration
void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method)
ActOnFinishDelayedCXXMethodDeclaration - We have finished processing the delayed method declaration f...
Definition: SemaDeclCXX.cpp:8123
clang::Declarator::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclSpec.h:1890
clang::CXXRecordDecl::isDerivedFrom
bool isDerivedFrom(const CXXRecordDecl *Base) const
Determine whether this class is derived from the class Base.
Definition: CXXInheritance.cpp:92
clang::DeclaratorChunk
One instance of this struct is used for each type in a declarator that is parsed. ...
Definition: DeclSpec.h:1148
CXXInheritance.h
clang::VarTemplateDecl
Declaration of a variable template.
Definition: DeclTemplate.h:2862
clang::InitializationKind::CreateDefault
static InitializationKind CreateDefault(SourceLocation InitLoc)
Create a default initialization.
Definition: Initialization.h:656
clang::NamespaceDecl
Represent a C++ namespace.
Definition: Decl.h:515
isNonlocalVariable
static bool isNonlocalVariable(const Decl *D)
Determine whether the given declaration is a global variable or static data member.
Definition: SemaDeclCXX.cpp:14900
clang::CXXConstructExpr
Represents a call to a C++ constructor.
Definition: ExprCXX.h:1262
clang::FixItHint::CreateInsertionFromRange
static FixItHint CreateInsertionFromRange(SourceLocation InsertionLoc, CharSourceRange FromRange, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code from FromRange at a specific location...
Definition: Diagnostic.h:105
clang::DeclStmt::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Stmt.h:1169
clang::DeclarationNameInfo::getEndLoc
SourceLocation getEndLoc() const LLVM_READONLY
Definition: DeclarationName.h:806
clang::DeclSpec::getSpecifierName
static const char * getSpecifierName(DeclSpec::TST T, const PrintingPolicy &Policy)
Turn a type-specifier-type into a string like "_Bool" or "union".
Definition: DeclSpec.cpp:521
clang::Decl::getEndLoc
SourceLocation getEndLoc() const LLVM_READONLY
Definition: DeclBase.h:414
clang::TemplateParameterList::getParam
NamedDecl * getParam(unsigned Idx)
Definition: DeclTemplate.h:133
clang::CXXRecordDecl::hasTrivialMoveConstructor
bool hasTrivialMoveConstructor() const
Determine whether this class has a trivial move constructor (C++11 [class.copy]p12) ...
Definition: DeclCXX.h:1423
clang::QualType::withConst
QualType withConst() const
Definition: Type.h:810
clang::DeclaratorChunk::ParamInfo::DefaultArgTokens
std::unique_ptr< CachedTokens > DefaultArgTokens
DefaultArgTokens - When the parameter&#39;s default argument cannot be parsed immediately (because it occ...
Definition: DeclSpec.h:1234
clang::ASTContext::getTargetInfo
const TargetInfo & getTargetInfo() const
Definition: ASTContext.h:690
clang::AccessSpecifier
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:98
Specifier
const NestedNameSpecifier * Specifier
Definition: USRLocFinder.cpp:173
clang::FunctionProtoType::ExtProtoInfo::RefQualifier
RefQualifierKind RefQualifier
Definition: Type.h:3772
clang::TypeSourceInfo
A container of type source information.
Definition: Decl.h:87
clang::OpaquePtr< QualType >
LiteralSupport.h
clang::FPOptions
Floating point control options.
Definition: LangOptions.h:307
clang::XRayInstrKind::Function
constexpr XRayInstrMask Function
Definition: XRayInstr.h:39
printTemplateArgs
static std::string printTemplateArgs(const PrintingPolicy &PrintingPolicy, TemplateArgumentListInfo &Args)
Definition: SemaDeclCXX.cpp:916
clang::UnqualifiedIdKind::IK_OperatorFunctionId
An overloaded operator name, e.g., operator+.
clang::FunctionDecl::isDefined
bool isDefined(const FunctionDecl *&Definition) const
Returns true if the function has a definition that does not need to be instantiated.
Definition: Decl.cpp:2720
clang::DeclSpec::getThreadStorageClassSpec
TSCS getThreadStorageClassSpec() const
Definition: DeclSpec.h:452
clang::CXXRecordDecl::needsImplicitMoveAssignment
bool needsImplicitMoveAssignment() const
Determine whether this class should get an implicit move assignment operator or if any existing speci...
Definition: DeclCXX.h:1161
clang::CXXConversionDecl::getConversionType
QualType getConversionType() const
Returns the type that this conversion function is converting to.
Definition: DeclCXX.h:2800
clang::InitializedEntity::InitializeMemberFromDefaultMemberInitializer
static InitializedEntity InitializeMemberFromDefaultMemberInitializer(FieldDecl *Member)
Create the initialization entity for a default member initializer.
Definition: Initialization.h:373
clang::LookupResult::Filter::hasNext
bool hasNext() const
Definition: Lookup.h:628
clang::Sema::VerifyICEDiagnoser
Abstract base class used for diagnosing integer constant expression violations.
Definition: Sema.h:9977
clang::CXXBasePath
Represents a path from a specific derived class (which is not represented as part of the path) to a p...
Definition: CXXInheritance.h:71
clang::Decl::getIdentifierNamespace
unsigned getIdentifierNamespace() const
Definition: DeclBase.h:792
clang::CXXConstructorDecl
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2484
clang::LookupResult::clear
LLVM_ATTRIBUTE_REINITIALIZES void clear()
Clears out any current state.
Definition: Lookup.h:543
clang::ParsedAttr::getPropertyDataGetter
IdentifierInfo * getPropertyDataGetter() const
Definition: ParsedAttr.h:530
clang::ASTContext::WideCharTy
CanQualType WideCharTy
Definition: ASTContext.h:1020
clang::CXXRecordDecl::implicitCopyAssignmentHasConstParam
bool implicitCopyAssignmentHasConstParam() const
Determine whether an implicit copy assignment operator for this type would have a parameter with a co...
Definition: DeclCXX.h:1124
clang::Sema::CheckCXXDefaultArgExpr
bool CheckCXXDefaultArgExpr(SourceLocation CallLoc, FunctionDecl *FD, ParmVarDecl *Param)
Instantiate or parse a C++ default argument expression as necessary.
Definition: SemaExpr.cpp:4652
distance
float __ovld __cnfn distance(float p0, float p1)
Returns the distance between p0 and p1.
clang::Sema::MarkFunctionReferenced
void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func, bool MightBeOdrUse=true)
Mark a function referenced, and check whether it is odr-used (C++ [basic.def.odr]p2, C99 6.9p3)
Definition: SemaExpr.cpp:14615
clang::CXXRecordDecl::needsOverloadResolutionForCopyConstructor
bool needsOverloadResolutionForCopyConstructor() const
Determine whether we need to eagerly declare a defaulted copy constructor for this class...
Definition: DeclCXX.h:1008
clang::FunctionDecl::param_size
size_t param_size() const
Definition: Decl.h:2278
clang::FieldDecl::hasInClassInitializer
bool hasInClassInitializer() const
Determine whether this member has a C++11 default member initializer.
Definition: Decl.h:2714
clang::TypeLoc::getEndLoc
SourceLocation getEndLoc() const
Get the end source location.
Definition: TypeLoc.cpp:227
clang::Sema::MergeCXXFunctionDecl
bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, Scope *S)
MergeCXXFunctionDecl - Merge two declarations of the same C++ function, once we already know that the...
Definition: SemaDeclCXX.cpp:435
clang::VirtSpecifiers::getOverrideLoc
SourceLocation getOverrideLoc() const
Definition: DeclSpec.h:2518
clang::Sema::InheritedConstructorInfo
Definition: SemaDeclCXX.cpp:6225
clang::ArrayType::getElementType
QualType getElementType() const
Definition: Type.h:2847
clang::TagDecl::isCompleteDefinition
bool isCompleteDefinition() const
Return true if this decl has its body fully specified.
Definition: Decl.h:3169
clang::Sema::CheckCXXDefaultArguments
void CheckCXXDefaultArguments(FunctionDecl *FD)
CheckCXXDefaultArguments - Verify that the default arguments for a function declaration are well-form...
Definition: SemaDeclCXX.cpp:1504
Value
Value
Definition: UninitializedValues.cpp:102
clang::CXXConstructorDecl::isDefaultConstructor
bool isDefaultConstructor() const
Whether this constructor is a default constructor (C++ [class.ctor]p5), which can be used to default-...
Definition: DeclCXX.cpp:2356
clang::Sema::SynthesizedFunctionScope
RAII object to handle the state changes required to synthesize a function body.
Definition: Sema.h:762
clang::ParsedAttr::getPropertyDataSetter
IdentifierInfo * getPropertyDataSetter() const
Definition: ParsedAttr.h:536
clang::Sema::BuildUsingPackDecl
NamedDecl * BuildUsingPackDecl(NamedDecl *InstantiatedFrom, ArrayRef< NamedDecl *> Expansions)
Definition: SemaDeclCXX.cpp:10175
clang::InitializedEntity::InitializeBase
static InitializedEntity InitializeBase(ASTContext &Context, const CXXBaseSpecifier *Base, bool IsInheritedVirtualBase, const InitializedEntity *Parent=nullptr)
Create the initialization entity for a base class subobject.
Definition: SemaInit.cpp:3066
clang::Sema::DeclareImplicitMoveAssignment
CXXMethodDecl * DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl)
Declare the implicit move assignment operator for the given class.
Definition: SemaDeclCXX.cpp:12128
clang::ParsedAttributesView::end
iterator end()
Definition: ParsedAttr.h:820
clang::Sema::ActOnFinishCXXNonNestedClass
void ActOnFinishCXXNonNestedClass(Decl *D)
Definition: SemaDeclCXX.cpp:11330
ASTLambda.h
This file provides some common utility functions for processing Lambda related AST Constructs...
clang::CXXBasePaths::paths_iterator
std::list< CXXBasePath >::iterator paths_iterator
Definition: CXXInheritance.h:181
clang::ComparisonCategories::getPossibleResultsForType
static std::vector< ComparisonCategoryResult > getPossibleResultsForType(ComparisonCategoryType Type)
Return the list of results which are valid for the specified comparison category type.
Definition: ComparisonCategories.cpp:190
clang::Sema::ActOnDefaultCtorInitializers
void ActOnDefaultCtorInitializers(Decl *CDtorDecl)
Definition: SemaDeclCXX.cpp:5264
clang::CXXBasePath::Decls
DeclContext::lookup_result Decls
The set of declarations found inside this base class subobject.
Definition: CXXInheritance.h:82
clang::Declarator::isFunctionDeclarationContext
bool isFunctionDeclarationContext() const
Return true if this declaration appears in a context where a function declarator would be a function ...
Definition: DeclSpec.h:2291
clang::FriendDecl
FriendDecl - Represents the declaration of a friend entity, which can be a function, a type, or a templated function or type.
Definition: DeclFriend.h:54
clang::TagDecl::isInterface
bool isInterface() const
Definition: Decl.h:3250
clang::CXXConstructExpr::Create
static CXXConstructExpr * Create(const ASTContext &Ctx, QualType Ty, SourceLocation Loc, CXXConstructorDecl *Ctor, bool Elidable, ArrayRef< Expr *> Args, bool HadMultipleCandidates, bool ListInitialization, bool StdInitListInitialization, bool ZeroInitialization, ConstructionKind ConstructKind, SourceRange ParenOrBraceRange)
Create a C++ construction expression.
Definition: ExprCXX.cpp:984
clang::EnterExpressionEvaluationContext
RAII object that enters a new expression evaluation context.
Definition: Sema.h:10853
clang::Sema::ActOnStartDelayedMemberDeclarations
void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record)
Definition: SemaDeclCXX.cpp:8061
clang::VarDecl
Represents a variable declaration or definition.
Definition: Decl.h:813
clang::StmtResult
ActionResult< Stmt * > StmtResult
Definition: Ownership.h:268
clang::Sema::PDiag
PartialDiagnostic PDiag(unsigned DiagID=0)
Build a partial diagnostic.
Definition: SemaInternal.h:25
clang::NestedNameSpecifier::Create
static NestedNameSpecifier * Create(const ASTContext &Context, NestedNameSpecifier *Prefix, IdentifierInfo *II)
Builds a specifier combining a prefix and an identifier.
Definition: NestedNameSpecifier.cpp:59
clang::Declarator
Information about one declarator, including the parsed type information and the identifier.
Definition: DeclSpec.h:1765
clang::FunctionDecl::getReturnType
QualType getReturnType() const
Definition: Decl.h:2302
clang::Sema::Diags
DiagnosticsEngine & Diags
Definition: Sema.h:326
clang::MemberPointerTypeLoc
Wrapper for source info for member pointers.
Definition: TypeLoc.h:1232
clang::SC_Static
Definition: Specifiers.h:210
clang::FunctionProtoType::getNumParams
unsigned getNumParams() const
Definition: Type.h:3888
clang::Type::isEnumeralType
bool isEnumeralType() const
Definition: Type.h:6373
clang::SC_None
Definition: Specifiers.h:208
clang::CXXRecordDecl::finishedDefaultedOrDeletedMember
void finishedDefaultedOrDeletedMember(CXXMethodDecl *MD)
Indicates that the declaration of a defaulted or deleted special member function is now complete...
Definition: DeclCXX.cpp:1285
clang::UnqualifiedIdKind::IK_DestructorName
A destructor name.
clang::Type::getAs
const T * getAs() const
Member-template getAs<specific type>&#39;.
Definition: Type.h:6748
clang::ParmVarDecl::hasDefaultArg
bool hasDefaultArg() const
Determines whether this parameter has a default argument, either parsed or not.
Definition: Decl.cpp:2621
clang::Sema::getPrintingPolicy
PrintingPolicy getPrintingPolicy() const
Retrieve a suitable printing policy for diagnostics.
Definition: Sema.h:2178
clang::Sema::computeDeclContext
DeclContext * computeDeclContext(QualType T)
Compute the DeclContext that is associated with the given type.
Definition: SemaCXXScopeSpec.cpp:54
clang::FunctionProtoType::ExtProtoInfo
Extra information about a function prototype.
Definition: Type.h:3767
clang::EST_Dynamic
throw(T1, T2)
Definition: ExceptionSpecificationType.h:24
clang::ParmVarDecl::hasInheritedDefaultArg
bool hasInheritedDefaultArg() const
Definition: Decl.h:1676
clang::CXXBasePaths::clear
void clear()
Clear the base-paths results.
Definition: CXXInheritance.cpp:71
clang::DeclContext::decls
decl_range decls() const
decls_begin/decls_end - Iterate over the declarations stored in this context.
Definition: DeclBase.h:1997
clang::TypeSpecifierType
TypeSpecifierType
Specifies the kind of type.
Definition: Specifiers.h:45
IIK_Default
Definition: SemaDeclCXX.cpp:4272
clang::ComparisonCategoryResult::Equivalent
clang::CXXRecordDecl::needsImplicitCopyAssignment
bool needsImplicitCopyAssignment() const
Determine whether this class needs an implicit copy assignment operator to be lazily declared...
Definition: DeclCXX.h:1112
clang::MSPropertyDecl::Create
static MSPropertyDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation L, DeclarationName N, QualType T, TypeSourceInfo *TInfo, SourceLocation StartL, IdentifierInfo *Getter, IdentifierInfo *Setter)
Definition: DeclCXX.cpp:2915
clang::TTK_Interface
The "__interface" keyword.
Definition: Type.h:5036
clang::Sema::checkIllFormedTrivialABIStruct
void checkIllFormedTrivialABIStruct(CXXRecordDecl &RD)
Check that the C++ class annoated with "trivial_abi" satisfies all the conditions that are needed for...
Definition: SemaDeclCXX.cpp:7863
clang::TemplateSpecializationTypeLoc
Definition: TypeLoc.h:1550
clang::DiagnosticErrorTrap
RAII class that determines when any errors have occurred between the time the instance was created an...
Definition: Diagnostic.h:999
clang::NamedDecl::getUnderlyingDecl
NamedDecl * getUnderlyingDecl()
Looks through UsingDecls and ObjCCompatibleAliasDecls for the underlying named decl.
Definition: Decl.h:432
clang::Sema::ActOnFinishFullExpr
ExprResult ActOnFinishFullExpr(Expr *Expr, bool DiscardedValue)
Definition: Sema.h:5349
clang::VirtSpecifiers::getFinalLoc
SourceLocation getFinalLoc() const
Definition: DeclSpec.h:2522
clang::RecordDecl::field_empty
bool field_empty() const
Definition: Decl.h:3792
clang::FieldDecl::isZeroLengthBitField
bool isZeroLengthBitField(const ASTContext &Ctx) const
Is this a zero-length bit-field? Such bit-fields aren&#39;t really bit-fields at all and instead act as a...
Definition: Decl.cpp:3792
clang::LookupResult::isAmbiguous
bool isAmbiguous() const
Definition: Lookup.h:290
clang::TypoCorrection::getCorrectionSpecifier
NestedNameSpecifier * getCorrectionSpecifier() const
Gets the NestedNameSpecifier needed to use the typo correction.
Definition: TypoCorrection.h:92
clang::Sema::SpecialMemberOverloadResult::Ambiguous
Definition: Sema.h:1067
clang::TypoCorrection::getCorrectionDeclAs
DeclClass * getCorrectionDeclAs() const
Definition: TypoCorrection.h:157
clang::DeclContextLookupResult::front
reference front() const
Definition: DeclBase.h:1234
clang::CXXRecordDecl::hasTrivialDefaultConstructor
bool hasTrivialDefaultConstructor() const
Determine whether this class has a trivial default constructor (C++11 [class.ctor]p5).
Definition: DeclCXX.h:1363
clang::ElaboratedTypeLoc::getNamedTypeLoc
TypeLoc getNamedTypeLoc() const
Definition: TypeLoc.h:1972
clang::Decl::isInvalidDecl
bool isInvalidDecl() const
Definition: DeclBase.h:542
clang::IfStmt::getThen
Stmt * getThen()
Definition: Stmt.h:1774
clang::frontend::After
Like System, but searched after the system directories.
Definition: HeaderSearchOptions.h:60
buildMemcpyForAssignmentOp
static StmtResult buildMemcpyForAssignmentOp(Sema &S, SourceLocation Loc, QualType T, const ExprBuilder &ToB, const ExprBuilder &FromB)
When generating a defaulted copy or move assignment operator, if a field should be copied with __buil...
Definition: SemaDeclCXX.cpp:11511
clang::TemplateParameterList
Stores a list of template parameters for a TemplateDecl and its derived classes.
Definition: DeclTemplate.h:68
clang::SourceRange::setBegin
void setBegin(SourceLocation b)
Definition: SourceLocation.h:210
clang::TypeWithKeyword::getTagTypeKindName
static StringRef getTagTypeKindName(TagTypeKind Kind)
Definition: Type.h:5113
clang::DeclSpec::hasTypeSpecifier
bool hasTypeSpecifier() const
Return true if any type-specifier has been found.
Definition: DeclSpec.h:609
clang::InitializationKind::CreateDirectList
static InitializationKind CreateDirectList(SourceLocation InitLoc)
Definition: Initialization.h:608
clang::CXXRecordDecl::isInterfaceLike
bool isInterfaceLike() const
Definition: DeclCXX.cpp:1742
clang::PrintingPolicy
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:38
clang::Sema::CodeSynthesisContext
A context in which code is being synthesized (where a source location alone is not sufficient to iden...
Definition: Sema.h:7170
clang::Sema::DefineImplicitLambdaToFunctionPointerConversion
void DefineImplicitLambdaToFunctionPointerConversion(SourceLocation CurrentLoc, CXXConversionDecl *Conv)
Define the "body" of the conversion from a lambda object to a function pointer.
Definition: SemaDeclCXX.cpp:12760
SemaInternal.h
clang::NestedNameSpecifier::getKind
SpecifierKind getKind() const
Determine what kind of nested name specifier is stored.
Definition: NestedNameSpecifier.cpp:143
clang::DeclaratorChunk::FunctionTypeInfo::hasMethodTypeQualifiers
bool hasMethodTypeQualifiers() const
Determine whether this method has qualifiers.
Definition: DeclSpec.h:1452
clang::CXXMethodDecl::isStatic
bool isStatic() const
Definition: DeclCXX.cpp:1872
clang::CXXRecordDecl::hasDefinition
bool hasDefinition() const
Definition: DeclCXX.h:776
clang::ComparisonCategories::getResultString
static StringRef getResultString(ComparisonCategoryResult Kind)
Definition: ComparisonCategories.cpp:168
clang::Sema::ActOnFriendTypeDecl
Decl * ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, MultiTemplateParamsArg TemplateParams)
Handle a friend type declaration.
Definition: SemaDeclCXX.cpp:14171
clang::MultiVersionKind::Target
clang::AccessSpecDecl::Create
static AccessSpecDecl * Create(ASTContext &C, AccessSpecifier AS, DeclContext *DC, SourceLocation ASLoc, SourceLocation ColonLoc)
Definition: DeclCXX.h:163
clang::ParmVarDecl
Represents a parameter to a function.
Definition: Decl.h:1550
clang::Sema::CheckComparisonCategoryType
QualType CheckComparisonCategoryType(ComparisonCategoryType Kind, SourceLocation Loc)
Lookup the specified comparison category types in the standard library, an check the VarDecls possibl...
Definition: SemaDeclCXX.cpp:9064
clang::QualType::getLocalUnqualifiedType
QualType getLocalUnqualifiedType() const
Return this type with all of the instance-specific qualifiers removed, but without removing any quali...
Definition: Type.h:877
clang::FunctionDecl::param_iterator
MutableArrayRef< ParmVarDecl * >::iterator param_iterator
Definition: Decl.h:2270
ExprCXX.h
Defines the clang::Expr interface and subclasses for C++ expressions.
clang::frontend::FixIt
Parse and apply any fixits to the source.
Definition: FrontendOptions.h:77
clang::DeclContext::removeDecl
void removeDecl(Decl *D)
Removes a declaration from this context.
Definition: DeclBase.cpp:1427
clang::EST_DependentNoexcept
noexcept(expression), value-dependent
Definition: ExceptionSpecificationType.h:27
clang::ElaboratedTypeLoc::setQualifierLoc
void setQualifierLoc(NestedNameSpecifierLoc QualifierLoc)
Definition: TypeLoc.h:1952
clang::Sema::MergeVarDeclExceptionSpecs
void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old)
Merge the exception specifications of two variable declarations.
Definition: SemaDeclCXX.cpp:1464
clang::TypeSpecTypeLoc
A reasonable base class for TypeLocs that correspond to types that are written as a type-specifier...
Definition: TypeLoc.h:507
clang::CXXConstructorDecl::getTargetConstructor
CXXConstructorDecl * getTargetConstructor() const
When this constructor delegates to another, retrieve the target.
Definition: DeclCXX.cpp:2347
clang::Qualifiers
The collection of all-type qualifiers we support.
Definition: Type.h:141
clang::FieldDecl::isAnonymousStructOrUnion
bool isAnonymousStructOrUnion() const
Determines whether this field is a representative for an anonymous struct or union.
Definition: Decl.cpp:3777
clang::CXXBasePaths::isRecordingPaths
bool isRecordingPaths() const
Whether we are recording paths.
Definition: CXXInheritance.h:213
clang::Sema::ActOnCallExpr
ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, MultiExprArg ArgExprs, SourceLocation RParenLoc, Expr *ExecConfig=nullptr, bool IsExecConfig=false)
ActOnCallExpr - Handle a call to Fn with the specified array of arguments.
Definition: SemaExpr.cpp:5408
clang::CXXRecordDecl::isLocalClass
const FunctionDecl * isLocalClass() const
If the class is a local class [class.local], returns the enclosing function declaration.
Definition: DeclCXX.h:1647
clang::DeclSpec::TQ_restrict
Definition: DeclSpec.h:316
clang::Sema::DefineImplicitMoveConstructor
void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, CXXConstructorDecl *Constructor)
DefineImplicitMoveConstructor - Checks for feasibility of defining this constructor as the move const...
Definition: SemaDeclCXX.cpp:12715
clang::FunctionDecl::getReturnTypeSourceRange
SourceRange getReturnTypeSourceRange() const
Attempt to compute an informative source range covering the function return type. ...
Definition: Decl.cpp:3202
clang::FTIHasNonVoidParameters
bool FTIHasNonVoidParameters(const DeclaratorChunk::FunctionTypeInfo &FTI)
Definition: SemaInternal.h:37
clang::Sema::CheckConstructorDeclarator
QualType CheckConstructorDeclarator(Declarator &D, QualType R, StorageClass &SC)
CheckConstructorDeclarator - Called by ActOnDeclarator to check the well-formedness of the constructo...
Definition: SemaDeclCXX.cpp:8149
isIncompleteOrZeroLengthArrayType
static bool isIncompleteOrZeroLengthArrayType(ASTContext &Context, QualType T)
Determine whether the given type is an incomplete or zero-lenfgth array type.
Definition: SemaDeclCXX.cpp:4612
clang::Sema::CheckDelayedMemberExceptionSpecs
void CheckDelayedMemberExceptionSpecs()
Definition: SemaDeclCXX.cpp:6731
clang::NamedDecl::getIdentifier
IdentifierInfo * getIdentifier() const
Get the identifier that names this declaration, if there is one.
Definition: Decl.h:270
clang::TypeLoc
Base wrapper for a particular "section" of type source info.
Definition: TypeLoc.h:57
clang::CXXMethodDecl::isMoveAssignmentOperator
bool isMoveAssignmentOperator() const
Determine whether this is a move assignment operator.
Definition: DeclCXX.cpp:2124
clang::DeclSpec::getFriendSpecLoc
SourceLocation getFriendSpecLoc() const
Definition: DeclSpec.h:722
clang::ast_matchers::recordType
const AstTypeMatcher< RecordType > recordType
Matches record types (e.g.
Definition: ASTMatchersInternal.cpp:831
clang::Declarator::isRedeclaration
bool isRedeclaration() const
Definition: DeclSpec.h:2485
clang::Sema::ActOnMemInitializers
void ActOnMemInitializers(Decl *ConstructorDecl, SourceLocation ColonLoc, ArrayRef< CXXCtorInitializer *> MemInits, bool AnyErrors)
ActOnMemInitializers - Handle the member initializers for a constructor.
Definition: SemaDeclCXX.cpp:5074
clang::RecordDecl
Represents a struct/union/class.
Definition: Decl.h:3593
clang::CXXRecordDecl::hasTrivialCopyConstructorForCall
bool hasTrivialCopyConstructorForCall() const
Definition: DeclCXX.h:1404
clang::Sema::ShouldDeleteSpecialMember
bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM, InheritedConstructorInfo *ICI=nullptr, bool Diagnose=false)
Determine if a special member function should have a deleted definition when it is defaulted...
Definition: SemaDeclCXX.cpp:7177
clang::Sema::CodeSynthesisContext::Kind
enum clang::Sema::CodeSynthesisContext::SynthesisKind Kind
clang::Sema::LoadExternalVTableUses
void LoadExternalVTableUses()
Load any externally-stored vtable uses.
Definition: SemaDeclCXX.cpp:14971
clang::Sema::CheckUsingDeclQualifier
bool CheckUsingDeclQualifier(SourceLocation UsingLoc, bool HasTypename, const CXXScopeSpec &SS, const DeclarationNameInfo &NameInfo, SourceLocation NameLoc)
Checks that the given nested-name qualifier used in a using decl in the current context is appropriat...
Definition: SemaDeclCXX.cpp:10297
getTupleLikeElementType
static QualType getTupleLikeElementType(Sema &S, SourceLocation Loc, unsigned I, QualType T)
Definition: SemaDeclCXX.cpp:1049
clang::CXXRecordDecl::isEmpty
bool isEmpty() const
Determine whether this is an empty class in the sense of (C++11 [meta.unary.prop]).
Definition: DeclCXX.h:1327
clang::ClassTemplateSpecializationDecl::getTemplateArgs
const TemplateArgumentList & getTemplateArgs() const
Retrieve the template arguments of the class template specialization.
Definition: DeclTemplate.h:1736
clang::InheritedConstructor
Description of a constructor that was inherited from a base class.
Definition: DeclCXX.h:2458
IsEquivalentForUsingDecl
static bool IsEquivalentForUsingDecl(ASTContext &Context, NamedDecl *D1, NamedDecl *D2)
Determine whether a using declaration considers the given declarations as "equivalent", e.g., if they are redeclarations of the same entity or are both typedefs of the same type.
Definition: SemaDeclCXX.cpp:9542
clang::UnqualifiedId::TemplateId
TemplateIdAnnotation * TemplateId
When Kind == IK_TemplateId or IK_ConstructorTemplateId, the template-id annotation that contains the ...
Definition: DeclSpec.h:986
clang::NamedDecl::getDeclName
DeclarationName getDeclName() const
Get the actual, stored name of the declaration, which may be a special name.
Definition: Decl.h:298
clang::DeclSpec::SCS_static
Definition: DeclSpec.h:236
clang::DeclContext::Encloses
bool Encloses(const DeclContext *DC) const
Determine whether this declaration context encloses the declaration context DC.
Definition: DeclBase.cpp:1148
clang::FunctionProtoType::ExtProtoInfo::ExtInfo
FunctionType::ExtInfo ExtInfo
Definition: Type.h:3768
clang::ClassTemplateSpecializationDecl
Represents a class template specialization, which refers to a class template with a given set of temp...
Definition: DeclTemplate.h:1648
clang::IdentifierInfo
One of these records is kept for each identifier that is lexed.
Definition: IdentifierTable.h:58
clang::TargetInfo::getCXXABI
TargetCXXABI getCXXABI() const
Get the C++ ABI currently in use.
Definition: TargetInfo.h:1022
clang::LookupResult::Ambiguous
Name lookup results in an ambiguity; use getAmbiguityKind to figure out what kind of ambiguity we hav...
Definition: Lookup.h:74
clang::TemplateTypeParmDecl::getDepth
unsigned getDepth() const
Retrieve the depth of the template parameter.
Definition: DeclTemplate.cpp:518
clang::Sema::ActOnStartNamespaceDef
Decl * ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, SourceLocation NamespaceLoc, SourceLocation IdentLoc, IdentifierInfo *Ident, SourceLocation LBrace, const ParsedAttributesView &AttrList, UsingDirectiveDecl *&UsingDecl)
ActOnStartNamespaceDef - This is called at the start of a namespace definition.
Definition: SemaDeclCXX.cpp:8841
IsUsingDirectiveInToplevelContext
static bool IsUsingDirectiveInToplevelContext(DeclContext *CurContext)
Determine whether a using statement is in a context where it will be apply in all contexts...
Definition: SemaDeclCXX.cpp:9306
clang::Sema::ActOnNamespaceAliasDef
Decl * ActOnNamespaceAliasDef(Scope *CurScope, SourceLocation NamespaceLoc, SourceLocation AliasLoc, IdentifierInfo *Alias, CXXScopeSpec &SS, SourceLocation IdentLoc, IdentifierInfo *Ident)
Definition: SemaDeclCXX.cpp:10641
clang::CXXBasePaths::setRecordingPaths
void setRecordingPaths(bool RP)
Specify whether we should be recording paths or not.
Definition: CXXInheritance.h:216
clang::FieldDecl::getCanonicalDecl
FieldDecl * getCanonicalDecl() override
Retrieves the canonical declaration of this field.
Definition: Decl.h:2774
clang::IdentifierInfo::isStr
bool isStr(const char(&Str)[StrLen]) const
Return true if this is the identifier for the specified string.
Definition: IdentifierTable.h:137
clang::Sema::ActOnExprStmt
StmtResult ActOnExprStmt(ExprResult Arg, bool DiscardedValue=true)
Definition: SemaStmt.cpp:45
clang::UnqualifiedId::ConversionFunctionId
UnionParsedType ConversionFunctionId
When Kind == IK_ConversionFunctionId, the type that the conversion function names.
Definition: DeclSpec.h:970
clang::ParmVarDecl::setUninstantiatedDefaultArg
void setUninstantiatedDefaultArg(Expr *arg)
Definition: Decl.cpp:2610
clang::ASTContext
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:155
clang::ASTContext::NumImplicitMoveConstructorsDeclared
static unsigned NumImplicitMoveConstructorsDeclared
The number of implicitly-declared move constructors for which declarations were built.
Definition: ASTContext.h:2806
clang::NestedNameSpecifierLoc
A C++ nested-name-specifier augmented with source location information.
Definition: NestedNameSpecifier.h:237
clang::NamespaceDecl::isInline
bool isInline() const
Returns true if this is an inline namespace declaration.
Definition: Decl.h:576
IIK_Move
Definition: SemaDeclCXX.cpp:4274
clang::Sema::inTemplateInstantiation
bool inTemplateInstantiation() const
Determine whether we are currently performing template instantiation.
Definition: Sema.h:7520
clang::ClassTemplateSpecializationDecl::getSpecializationKind
TemplateSpecializationKind getSpecializationKind() const
Determine the kind of specialization that this declaration represents.
Definition: DeclTemplate.h:1742
clang::FunctionProtoType::getParamTypes
ArrayRef< QualType > getParamTypes() const
Definition: Type.h:3895
clang::DeclContextLookupResult
The results of name lookup within a DeclContext.
Definition: DeclBase.h:1187
clang::DeclSpec::getTypeSpecTypeLoc
SourceLocation getTypeSpecTypeLoc() const
Definition: DeclSpec.h:515
AR_inaccessible
Definition: SemaAccess.cpp:33
clang::TemplateArgumentLoc::getTypeSourceInfo
TypeSourceInfo * getTypeSourceInfo() const
Definition: TemplateBase.h:507
clang::ComparisonCategoryInfo::ValueInfo::VD
VarDecl * VD
Definition: ComparisonCategories.h:79
ImplicitInitializerKind
ImplicitInitializerKind
ImplicitInitializerKind - How an implicit base or member initializer should initialize its base or me...
Definition: SemaDeclCXX.cpp:4271
clang::TemplateName::getAsTemplateDecl
TemplateDecl * getAsTemplateDecl() const
Retrieve the underlying template declaration that this template name refers to, if known...
Definition: TemplateName.cpp:96
clang::CXXRecordDecl::defaultedDefaultConstructorIsConstexpr
bool defaultedDefaultConstructorIsConstexpr() const
Determine whether a defaulted default constructor for this class would be constexpr.
Definition: DeclCXX.h:1386
clang::RecordDecl::getDefinition
RecordDecl * getDefinition() const
Returns the RecordDecl that actually defines this struct/union/class.
Definition: Decl.h:3774
clang::CorrectionCandidateCallback
Base class for callback objects used by Sema::CorrectTypo to check the validity of a potential typo c...
Definition: TypoCorrection.h:282
clang::Sema::IsDerivedFrom
bool IsDerivedFrom(SourceLocation Loc, QualType Derived, QualType Base)
Determine whether the type Derived is a C++ class that is derived from the type Base.
Definition: SemaDeclCXX.cpp:2521
clang::RecordDecl::fields
field_range fields() const
Definition: Decl.h:3784
clang::Sema::ActOnBaseSpecifier
BaseResult ActOnBaseSpecifier(Decl *classdecl, SourceRange SpecifierRange, ParsedAttributes &Attrs, bool Virtual, AccessSpecifier Access, ParsedType basetype, SourceLocation BaseLoc, SourceLocation EllipsisLoc)
ActOnBaseSpecifier - Parsed a base specifier.
Definition: SemaDeclCXX.cpp:2332
CollectFieldInitializer
static bool CollectFieldInitializer(Sema &SemaRef, BaseAndFieldInfo &Info, FieldDecl *Field, IndirectFieldDecl *Indirect=nullptr)
Definition: SemaDeclCXX.cpp:4626
clang::ASTContext::getDependentNameType
QualType getDependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, const IdentifierInfo *Name, QualType Canon=QualType()) const
Definition: ASTContext.cpp:4222
clang::Stmt::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Stmt.cpp:288
clang::DeclarationName::getNameKind
NameKind getNameKind() const
Determine what kind of name this is.
Definition: DeclarationName.h:385
clang::Sema::checkExceptionSpecification
void checkExceptionSpecification(bool IsTopLevel, ExceptionSpecificationType EST, ArrayRef< ParsedType > DynamicExceptions, ArrayRef< SourceRange > DynamicExceptionRanges, Expr *NoexceptExpr, SmallVectorImpl< QualType > &Exceptions, FunctionProtoType::ExceptionSpecInfo &ESI)
Check the given exception-specification and update the exception specification information with the r...
Definition: SemaDeclCXX.cpp:15461
clang::UnqualifiedId::TemplateName
UnionParsedTemplateTy TemplateName
When Kind == IK_DeductionGuideName, the parsed template-name.
Definition: DeclSpec.h:981
clang::Sema::BuildExceptionDeclaration
VarDecl * BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id)
Perform semantic analysis for the variable declaration that occurs within a C++ catch clause...
Definition: SemaDeclCXX.cpp:13709
clang::FieldDecl
Represents a member of a struct/union/class.
Definition: Decl.h:2579
clang::NestedNameSpecifier::getAsType
const Type * getAsType() const
Retrieve the type stored in this nested name specifier.
Definition: NestedNameSpecifier.h:195
clang::CXXCtorInitializer::getTypeSourceInfo
TypeSourceInfo * getTypeSourceInfo() const
Returns the declarator information for a base class or delegating initializer.
Definition: DeclCXX.h:2386
clang::Qualifiers::removeConst
void removeConst()
Definition: Type.h:260
clang::Sema::isAbstractType
bool isAbstractType(SourceLocation Loc, QualType T)
Definition: SemaDeclCXX.cpp:5275
clang::UnaryOperator::isIncrementDecrementOp
static bool isIncrementDecrementOp(Opcode Op)
Definition: Expr.h:1969
clang::LookupResult::getLookupNameInfo
const DeclarationNameInfo & getLookupNameInfo() const
Gets the name info to look up.
Definition: Lookup.h:231
clang::Declarator::isFunctionDefinition
bool isFunctionDefinition() const
Definition: DeclSpec.h:2462
clang::FunctionProtoType::ExtProtoInfo::TypeQuals
Qualifiers TypeQuals
Definition: Type.h:3771
clang::CXXMethodDecl::getCanonicalDecl
CXXMethodDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:2127
clang::MemberExpr::getExprLoc
SourceLocation getExprLoc() const LLVM_READONLY
Definition: Expr.h:2885
clang::DeclarationNameInfo::setName
void setName(DeclarationName N)
setName - Sets the embedded declaration name.
Definition: DeclarationName.h:717
clang::Type::isReferenceType
bool isReferenceType() const
Definition: Type.h:6308
clang::DeclContextLookupResult::end
iterator end() const
Definition: DeclBase.h:1229
clang::Sema::getStdBadAlloc
CXXRecordDecl * getStdBadAlloc() const
Definition: SemaDeclCXX.cpp:9003
clang::CXXRecordDecl::hasTrivialMoveAssignment
bool hasTrivialMoveAssignment() const
Determine whether this class has a trivial move assignment operator (C++11 [class.copy]p25)
Definition: DeclCXX.h:1463
clang::DependentNameTypeLoc::setElaboratedKeywordLoc
void setElaboratedKeywordLoc(SourceLocation Loc)
Definition: TypeLoc.h:2002
clang::CXXConstructorDecl::getInheritedConstructor
InheritedConstructor getInheritedConstructor() const
Get the constructor that this inheriting constructor is based on.
Definition: DeclCXX.h:2679
clang::UnresolvedSetIterator
The iterator over UnresolvedSets.
Definition: UnresolvedSet.h:32
clang::UnresolvedUsingTypenameDecl::Create
static UnresolvedUsingTypenameDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc, SourceLocation TypenameLoc, NestedNameSpecifierLoc QualifierLoc, SourceLocation TargetNameLoc, DeclarationName TargetName, SourceLocation EllipsisLoc)
Definition: DeclCXX.cpp:2812
extendLeft
static void extendLeft(SourceRange &R, SourceRange Before)
Definition: SemaDeclCXX.cpp:8418
clang::CXXRecordDecl::hasUserDeclaredDestructor
bool hasUserDeclaredDestructor() const
Determine whether this class has a user-declared destructor.
Definition: DeclCXX.h:1179
clang::DeclarationNameTable::getCXXDestructorName
DeclarationName getCXXDestructorName(CanQualType Ty)
Returns the name of a C++ destructor for the given Type.
Definition: DeclarationName.cpp:320
clang::DeclRefExpr::Create
static DeclRefExpr * Create(const ASTContext &Context, NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc, ValueDecl *D, bool RefersToEnclosingVariableOrCapture, SourceLocation NameLoc, QualType T, ExprValueKind VK, NamedDecl *FoundD=nullptr, const TemplateArgumentListInfo *TemplateArgs=nullptr)
Definition: Expr.cpp:406
clang::FunctionTypeLoc::getParam
ParmVarDecl * getParam(unsigned i) const
Definition: TypeLoc.h:1408
ScopeInfo.h
clang::Type::isSpecificBuiltinType
bool isSpecificBuiltinType(unsigned K) const
Test for a particular builtin type.
Definition: Type.h:6511
clang::DeclContext::Equals
bool Equals(const DeclContext *DC) const
Determine whether this declaration context is equivalent to the declaration context DC...
Definition: DeclBase.h:1872
clang::ASTContext::MakeIntValue
llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const
Make an APSInt of the appropriate width and signedness for the given Value and integer Type...
Definition: ASTContext.h:2633
clang::LookupResult::getResultKind
LookupResultKind getResultKind() const
Definition: Lookup.h:310
clang::Sema::DefineUsedVTables
bool DefineUsedVTables()
Define all of the vtables that have been used in this translation unit and reference any virtual memb...
Definition: SemaDeclCXX.cpp:15057
clang::FunctionDecl::setParams
void setParams(ArrayRef< ParmVarDecl *> NewParamInfo)
Definition: Decl.h:2293
clang::CastExpr::getSubExpr
Expr * getSubExpr()
Definition: Expr.h:3050
clang::AccessSpecDecl
Represents an access specifier followed by colon &#39;:&#39;.
Definition: DeclCXX.h:132
clang::DeclSpec::ClearStorageClassSpecs
void ClearStorageClassSpecs()
Definition: DeclSpec.h:465
clang::DeclaratorDecl::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Decl.h:739
clang::UsingDecl::addShadowDecl
void addShadowDecl(UsingShadowDecl *S)
Definition: DeclCXX.cpp:2711
clang::ComparisonCategoryResult
ComparisonCategoryResult
An enumeration representing the possible results of a three-way comparison.
Definition: ComparisonCategories.h:57
clang::Sema::CheckDeductionGuideDeclarator
void CheckDeductionGuideDeclarator(Declarator &D, QualType &R, StorageClass &SC)
Check the validity of a declarator that we parsed for a deduction-guide.
Definition: SemaDeclCXX.cpp:8683
clang::TemplateParameterList::getTemplateLoc
SourceLocation getTemplateLoc() const
Definition: DeclTemplate.h:172
clang::Sema::FinalizeVarWithDestructor
void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType)
FinalizeVarWithDestructor - Prepare for calling destructor on the constructed variable.
Definition: SemaDeclCXX.cpp:13053
clang::Sema::CheckExtraCXXDefaultArguments
void CheckExtraCXXDefaultArguments(Declarator &D)
CheckExtraCXXDefaultArguments - Check for any extra default arguments in the declarator, which is not a function declaration or definition and therefore is not permitted to have default arguments.
Definition: SemaDeclCXX.cpp:375
clang::LookupResult::NotFoundInCurrentInstantiation
No entity found met the criteria within the current instantiation,, but there were dependent base cla...
Definition: Lookup.h:56
clang::UnqualifiedIdKind::IK_LiteralOperatorId
A user-defined literal name, e.g., operator "" _i.
llvm::SmallVectorImpl
Definition: LLVM.h:37
clang::ASTContext::Idents
IdentifierTable & Idents
Definition: ASTContext.h:566
clang::Sema::SpecialMemberOverloadResult
SpecialMemberOverloadResult - The overloading result for a special member function.
Definition: Sema.h:1063
clang::Sema::NoteDeletedFunction
void NoteDeletedFunction(FunctionDecl *FD)
Emit a note explaining that this function is deleted.
Definition: SemaExpr.cpp:100
clang::CXXRecordDecl::setImplicitCopyConstructorIsDeleted
void setImplicitCopyConstructorIsDeleted()
Set that we attempted to declare an implicit copy constructor, but overload resolution failed so we d...
Definition: DeclCXX.h:1061
clang::VK_RValue
An r-value expression (a pr-value in the C++11 taxonomy) produces a temporary value.
Definition: Specifiers.h:110
clang::Declarator::isInvalidType
bool isInvalidType() const
Definition: DeclSpec.h:2443
clang::FunctionDecl::parameters
ArrayRef< ParmVarDecl * > parameters() const
Definition: Decl.h:2262
UnsupportedSTLSelect
UnsupportedSTLSelect
Definition: SemaDeclCXX.cpp:9033
clang::LookupResult::getAsSingle
DeclClass * getAsSingle() const
Definition: Lookup.h:496
clang::Sema::FindHiddenVirtualMethods
void FindHiddenVirtualMethods(CXXMethodDecl *MD, SmallVectorImpl< CXXMethodDecl *> &OverloadedMethods)
Check if a method overloads virtual methods in a base class without overriding any.
Definition: SemaDeclCXX.cpp:7805
clang::VirtSpecifiers::isFinalSpelledSealed
bool isFinalSpelledSealed() const
Definition: DeclSpec.h:2521
clang::TypeAliasTemplateDecl::getTemplatedDecl
TypeAliasDecl * getTemplatedDecl() const
Get the underlying function declaration of the template.
Definition: DeclTemplate.h:2350
clang::ParenListExpr::Create
static ParenListExpr * Create(const ASTContext &Ctx, SourceLocation LParenLoc, ArrayRef< Expr *> Exprs, SourceLocation RParenLoc)
Create a paren list.
Definition: Expr.cpp:4051
CheckConstexprDeclStmt
static bool CheckConstexprDeclStmt(Sema &SemaRef, const FunctionDecl *Dcl, DeclStmt *DS, SourceLocation &Cxx1yLoc)
Check the given declaration statement is legal within a constexpr function body.
Definition: SemaDeclCXX.cpp:1655
clang::UnqualifiedId::DestructorName
UnionParsedType DestructorName
When Kind == IK_DestructorName, the type referred to by the class-name.
Definition: DeclSpec.h:978
clang::InitListExpr
Describes an C or C++ initializer list.
Definition: Expr.h:4185
CharUnits.h
clang::UsingDecl
Represents a C++ using-declaration.
Definition: DeclCXX.h:3352
clang::RecordDecl::APK_CanPassInRegs
The argument of this type can be passed directly in registers.
Definition: Decl.h:3604
clang::DecompositionDecl::bindings
ArrayRef< BindingDecl * > bindings() const
Definition: DeclCXX.h:3875
clang::UnqualifiedId
Represents a C++ unqualified-id that has been parsed.
Definition: DeclSpec.h:934
clang::RValueReferenceType
An rvalue reference type, per C++11 [dcl.ref].
Definition: Type.h:2738
clang::Sema::isCompleteType
bool isCompleteType(SourceLocation Loc, QualType T)
Definition: Sema.h:1655
clang::NestedNameSpecifier::getAsRecordDecl
CXXRecordDecl * getAsRecordDecl() const
Retrieve the record declaration stored in this nested name specifier.
Definition: NestedNameSpecifier.cpp:185
clang::Sema::CXXCopyConstructor
Definition: Sema.h:1169
clang::TemplateParameterList::getMinRequiredArguments
unsigned getMinRequiredArguments() const
Returns the minimum number of arguments needed to form a template specialization. ...
Definition: DeclTemplate.cpp:89
clang::DeclSpec::TQ_unaligned
Definition: DeclSpec.h:318
clang::LookupResult::resolveKind
void resolveKind()
Resolves the result kind of the lookup, possibly hiding decls.
Definition: SemaLookup.cpp:469
clang::Sema::getOrCreateStdNamespace
NamespaceDecl * getOrCreateStdNamespace()
Retrieve the special "std" namespace, which may require us to implicitly define the namespace...
Definition: SemaDeclCXX.cpp:9163
ReferenceDllExportedMembers
static void ReferenceDllExportedMembers(Sema &S, CXXRecordDecl *Class)
Definition: SemaDeclCXX.cpp:5523
clang::LookupResult
Represents the results of name lookup.
Definition: Lookup.h:47
clang::ActionResult::get
PtrTy get() const
Definition: Ownership.h:174
clang::CXXConstructorDecl::isDelegatingConstructor
bool isDelegatingConstructor() const
Determine whether this constructor is a delegating constructor.
Definition: DeclCXX.h:2594
clang::LinkageSpecDecl::lang_c
Definition: DeclCXX.h:2838
clang::DeclAccessPair::make
static DeclAccessPair make(NamedDecl *D, AccessSpecifier AS)
Definition: DeclAccessPair.h:36
clang::Sema::ImplicitExceptionSpecification::CalledExpr
void CalledExpr(Expr *E)
Integrate an invoked expression into the collected data.
Definition: SemaDeclCXX.cpp:219
clang::AS_private
Definition: Specifiers.h:101
clang::InitializedEntity::InitializeDelegation
static InitializedEntity InitializeDelegation(QualType Type)
Create the initialization entity for a delegated constructor.
Definition: Initialization.h:351
clang::TagDecl::getTagKind
TagKind getTagKind() const
Definition: Decl.h:3243
clang::EST_MSAny
Microsoft throw(...) extension.
Definition: ExceptionSpecificationType.h:25
clang::TemplateArgumentListInfo
A convenient class for passing around template argument information.
Definition: TemplateBase.h:555
clang::diff::Move
Definition: ASTDiff.h:33
clang::RecordDecl::setParamDestroyedInCallee
void setParamDestroyedInCallee(bool V)
Definition: Decl.h:3735
clang::CXXBaseSpecifier::getAccessSpecifier
AccessSpecifier getAccessSpecifier() const
Returns the access specifier for this base specifier.
Definition: DeclCXX.h:272
clang::QualType::isTriviallyCopyableType
bool isTriviallyCopyableType(const ASTContext &Context) const
Return true if this is a trivially copyable type (C++0x [basic.types]p9)
Definition: Type.cpp:2205
clang::Sema::DeclareImplicitMoveConstructor
CXXConstructorDecl * DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl)
Declare the implicit move constructor for the given class.
Definition: SemaDeclCXX.cpp:12633
clang::Sema::isSpecialMemberAccessibleForDeletion
bool isSpecialMemberAccessibleForDeletion(CXXMethodDecl *decl, AccessSpecifier access, QualType objectType)
Is the given special member function accessible for the purposes of deciding whether to define a spec...
Definition: SemaAccess.cpp:1567
clang::Sema::checkThisInStaticMemberFunctionType
bool checkThisInStaticMemberFunctionType(CXXMethodDecl *Method)
Check whether &#39;this&#39; shows up in the type of a static member function after the (naturally empty) cv-...
Definition: SemaDeclCXX.cpp:15341
clang::Sema::CheckUsingShadowDecl
bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, const LookupResult &PreviousDecls, UsingShadowDecl *&PrevShadow)
Determines whether to create a using shadow decl for a particular decl, given the set of decls existi...
Definition: SemaDeclCXX.cpp:9557
clang::CXXRecordDecl::needsOverloadResolutionForCopyAssignment
bool needsOverloadResolutionForCopyAssignment() const
Determine whether we need to eagerly declare a defaulted copy assignment operator for this class...
Definition: DeclCXX.h:1118
clang::Sema::FilterAcceptableTemplateNames
void FilterAcceptableTemplateNames(LookupResult &R, bool AllowFunctionTemplates=true)
Definition: SemaTemplate.cpp:117
clang::Sema::isCurrentClassNameTypo
bool isCurrentClassNameTypo(IdentifierInfo *&II, const CXXScopeSpec *SS)
Determine whether the identifier II is a typo for the name of the class type currently being defined...
Definition: SemaDeclCXX.cpp:2131
clang::FunctionDecl::getDescribedFunctionTemplate
FunctionTemplateDecl * getDescribedFunctionTemplate() const
Retrieves the function template that is described by this function declaration.
Definition: Decl.cpp:3354
clang::Sema::CheckConstexprFunctionDecl
bool CheckConstexprFunctionDecl(const FunctionDecl *FD)
Definition: SemaDeclCXX.cpp:1595
clang::Sema::DefineInheritingConstructor
void DefineInheritingConstructor(SourceLocation UseLoc, CXXConstructorDecl *Constructor)
Define the specified inheriting constructor.
Definition: SemaDeclCXX.cpp:11131
clang::IndirectFieldDecl::chain
ArrayRef< NamedDecl * > chain() const
Definition: Decl.h:2847
clang::VK_XValue
An x-value expression is a reference to an object with independent storage but which can be "moved"...
Definition: Specifiers.h:119
clang::ComparisonCategoryType::First
clang::ParsedAttr::IgnoredAttribute
Definition: ParsedAttr.h:374
clang::Decl::FOK_Undeclared
A friend of a previously-undeclared entity.
Definition: DeclBase.h:1097
clang::CXXRecordDecl::hasNonTrivialDestructorForCall
bool hasNonTrivialDestructorForCall() const
Definition: DeclCXX.h:1492
clang::Stmt::children
child_range children()
Definition: Stmt.cpp:237
clang::Declarator::getNumTypeObjects
unsigned getNumTypeObjects() const
Return the number of types applied to this declarator.
Definition: DeclSpec.h:2175
BuildImplicitMemberInitializer
static bool BuildImplicitMemberInitializer(Sema &SemaRef, CXXConstructorDecl *Constructor, ImplicitInitializerKind ImplicitInitKind, FieldDecl *Field, IndirectFieldDecl *Indirect, CXXCtorInitializer *&CXXMemberInit)
Definition: SemaDeclCXX.cpp:4362
clang::Sema::MarkDeclRefReferenced
void MarkDeclRefReferenced(DeclRefExpr *E, const Expr *Base=nullptr)
Perform reference-marking and odr-use handling for a DeclRefExpr.
Definition: SemaExpr.cpp:15736
clang::StmtError
StmtResult StmtError()
Definition: Ownership.h:284
clang::ASTContext::getPrintingPolicy
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:654
clang::Type::containsUnexpandedParameterPack
bool containsUnexpandedParameterPack() const
Whether this type is or contains an unexpanded parameter pack, used to support C++0x variadic templat...
Definition: Type.h:1831
NoteIndirectBases
static void NoteIndirectBases(ASTContext &Context, IndirectBaseSet &Set, const QualType &Type)
Recursively add the bases of Type. Don&#39;t add Type itself.
Definition: SemaDeclCXX.cpp:2383
clang::PseudoObjectExpr::semantics_end
semantics_iterator semantics_end()
Definition: Expr.h:5373
clang::Sema::ActOnBaseSpecifiers
void ActOnBaseSpecifiers(Decl *ClassDecl, MutableArrayRef< CXXBaseSpecifier *> Bases)
ActOnBaseSpecifiers - Attach the given base specifiers to the class, after checking whether there are...
Definition: SemaDeclCXX.cpp:2510
clang::TypeDecl
Represents a declaration of a type.
Definition: Decl.h:2874
clang::BinaryOperator
A builtin binary operation expression such as "x + y" or "x <= y".
Definition: Expr.h:3287
clang::QualType::isVolatileQualified
bool isVolatileQualified() const
Determine whether this type is volatile-qualified.
Definition: Type.h:6142
clang::LookupResult::Filter::done
void done()
Definition: Lookup.h:661
AR_accessible
Definition: SemaAccess.cpp:32
clang::Qualifiers::getAddressSpace
LangAS getAddressSpace() const
Definition: Type.h:352
clang::Sema::CodeSynthesisContext::PointOfInstantiation
SourceLocation PointOfInstantiation
The point of instantiation or synthesis within the source code.
Definition: Sema.h:7235
clang::CompoundStmt::Create
static CompoundStmt * Create(const ASTContext &C, ArrayRef< Stmt *> Stmts, SourceLocation LB, SourceLocation RB)
Definition: Stmt.cpp:332
clang::Sema::CheckDelegatingCtorCycles
void CheckDelegatingCtorCycles()
Definition: SemaDeclCXX.cpp:15312
clang::ASTContext::getExceptionObjectType
QualType getExceptionObjectType(QualType T) const
Definition: ASTContext.cpp:5478
clang::Sema::CheckDestructorDeclarator
QualType CheckDestructorDeclarator(Declarator &D, QualType R, StorageClass &SC)
CheckDestructorDeclarator - Called by ActOnDeclarator to check the well-formednes of the destructor d...
Definition: SemaDeclCXX.cpp:8311
clang::MultiTemplateParamsArg
MutableArrayRef< TemplateParameterList * > MultiTemplateParamsArg
Definition: Ownership.h:281
clang::CXXScopeSpec::clear
void clear()
Definition: DeclSpec.h:211
clang::Type::isRValueReferenceType
bool isRValueReferenceType() const
Definition: Type.h:6316
checkMoveAssignmentForRepeatedMove
static void checkMoveAssignmentForRepeatedMove(Sema &S, CXXRecordDecl *Class, SourceLocation CurrentLocation)
Check if we&#39;re implicitly defining a move assignment operator for a class with virtual bases...
Definition: SemaDeclCXX.cpp:12205
clang::TypeLoc::isNull
bool isNull() const
Definition: TypeLoc.h:119
clang::InitListExpr::children
child_range children()
Definition: Expr.h:4368
clang::CXXConstructorDecl::inits
init_range inits()
Definition: DeclCXX.h:2527
clang::VarDecl::setExceptionVariable
void setExceptionVariable(bool EV)
Definition: Decl.h:1310
clang::RecordDecl::APK_CanNeverPassInRegs
The argument of this type cannot be passed directly in registers.
Definition: Decl.h:3618
clang::TargetInfo::CallingConvKind
CallingConvKind
Definition: TargetInfo.h:1254
clang::VarDecl::isConstexpr
bool isConstexpr() const
Whether this variable is (C++11) constexpr.
Definition: Decl.h:1382
clang::TypeResult
ActionResult< ParsedType > TypeResult
Definition: Ownership.h:269
clang::DeclContextLookupResult::slice
DeclContextLookupResult slice(size_t N) const
Definition: DeclBase.h:1239
clang::CXXRecordDecl::isLambda
bool isLambda() const
Determine whether this class describes a lambda function object.
Definition: DeclCXX.h:1196
clang::ASTContext::LongDoubleTy
CanQualType LongDoubleTy
Definition: ASTContext.h:1028
clang::Scope
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:41
clang::InitializationSequence::Perform
ExprResult Perform(Sema &S, const InitializedEntity &Entity, const InitializationKind &Kind, MultiExprArg Args, QualType *ResultType=nullptr)
Perform the actual initialization of the given entity based on the computed initialization sequence...
Definition: SemaInit.cpp:7284
clang::Sema::SetParamDefaultArgument
bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, SourceLocation EqualLoc)
Definition: SemaDeclCXX.cpp:249
clang::QualType::getTypePtr
const Type * getTypePtr() const
Retrieves a pointer to the underlying (unqualified) type.
Definition: Type.h:6072
clang::CXXRecordDecl::getCanonicalDecl
CXXRecordDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:728
clang::RecordDecl::field_begin
field_iterator field_begin() const
Definition: Decl.cpp:4145
clang::FunctionProtoType::param_type_begin
param_type_iterator param_type_begin() const
Definition: Type.h:4034
clang::declaresSameEntity
bool declaresSameEntity(const Decl *D1, const Decl *D2)
Determine whether two declarations declare the same entity.
Definition: DeclBase.h:1158
clang::ParmVarDecl::hasUnparsedDefaultArg
bool hasUnparsedDefaultArg() const
Determines whether this parameter has a default argument that has not yet been parsed.
Definition: Decl.h:1660
clang::Sema::CheckBaseSpecifier
CXXBaseSpecifier * CheckBaseSpecifier(CXXRecordDecl *Class, SourceRange SpecifierRange, bool Virtual, AccessSpecifier Access, TypeSourceInfo *TInfo, SourceLocation EllipsisLoc)
ActOnBaseSpecifier - Parsed a base specifier.
Definition: SemaDeclCXX.cpp:2191
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void setTrivial(bool IT)
Definition: Decl.h:2027
clang::frontend::CPlusPlus
Definition: LangStandard.h:26
clang::Sema::ActOnCXXThis
ExprResult ActOnCXXThis(SourceLocation loc)
Definition: SemaExprCXX.cpp:1283
clang::ParenListExpr
Definition: Expr.h:4919
clang::CXXCtorInitializer::isAnyMemberInitializer
bool isAnyMemberInitializer() const
Definition: DeclCXX.h:2333
clang::CXXScopeSpec
Represents a C++ nested-name-specifier or a global scope specifier.
Definition: DeclSpec.h:63
clang::ASTContext::NumImplicitDefaultConstructorsDeclared
static unsigned NumImplicitDefaultConstructorsDeclared
The number of implicitly-declared default constructors for which declarations were built...
Definition: ASTContext.h:2792
clang::CXXConstructorDecl::setNumCtorInitializers
void setNumCtorInitializers(unsigned numCtorInitializers)
Definition: DeclCXX.h:2575
clang::Decl::getLexicalDeclContext
DeclContext * getLexicalDeclContext()
getLexicalDeclContext - The declaration context where this Decl was lexically declared (LexicalDC)...
Definition: DeclBase.h:821
clang::CXXCtorInitializer::getAnyMember
FieldDecl * getAnyMember() const
Definition: DeclCXX.h:2398
clang::LambdaExpr
A C++ lambda expression, which produces a function object (of unspecified type) that can be invoked l...
Definition: ExprCXX.h:1649
clang::Sema::PP
Preprocessor & PP
Definition: Sema.h:323
clang::CXXRecordDecl::hasTrivialDestructor
bool hasTrivialDestructor() const
Determine whether this class has a trivial destructor (C++ [class.dtor]p3)
Definition: DeclCXX.h:1478
clang::VarDecl::Create
static VarDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, StorageClass S)
Definition: Decl.cpp:1918
clang::Sema::getLangOpts
const LangOptions & getLangOpts() const
Definition: Sema.h:1231
clang::NamespaceAliasDecl::Create
static NamespaceAliasDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation NamespaceLoc, SourceLocation AliasLoc, IdentifierInfo *Alias, NestedNameSpecifierLoc QualifierLoc, SourceLocation IdentLoc, NamedDecl *Namespace)
Definition: DeclCXX.cpp:2639
clang::IntegerLiteral::Create
static IntegerLiteral * Create(const ASTContext &C, const llvm::APInt &V, QualType type, SourceLocation l)
Returns a new integer literal with value &#39;V&#39; and type &#39;type&#39;.
Definition: Expr.cpp:792
clang::TemplateSpecializationTypeLoc::getArgLoc
TemplateArgumentLoc getArgLoc(unsigned i) const
Definition: TypeLoc.h:1592
clang::Sema::AdjustDestructorExceptionSpec
void AdjustDestructorExceptionSpec(CXXDestructorDecl *Destructor)
Build an exception spec for destructors that don&#39;t have one.
Definition: SemaDeclCXX.cpp:11345
clang::CXXMethodDecl::isInstance
bool isInstance() const
Definition: DeclCXX.h:2069
clang::DeclSpec::getConstSpecLoc
SourceLocation getConstSpecLoc() const
Definition: DeclSpec.h:548
clang::Expr::isTypeDependent
bool isTypeDependent() const
isTypeDependent - Determines whether this expression is type-dependent (C++ [temp.dep.expr]), which means that its type could change from one template instantiation to the next.
Definition: Expr.h:167
clang::Declarator::getCXXScopeSpec
const CXXScopeSpec & getCXXScopeSpec() const
getCXXScopeSpec - Return the C++ scope specifier (global scope or nested-name-specifier) that is part...
Definition: DeclSpec.h:1869
findCircularInheritance
static bool findCircularInheritance(const CXXRecordDecl *Class, const CXXRecordDecl *Current)
Determine whether the given class is a base class of the given class, including looking at dependent ...
Definition: SemaDeclCXX.cpp:2156
clang::TemplateArgumentList::data
const TemplateArgument * data() const
Retrieve a pointer to the template argument list.
Definition: DeclTemplate.h:273
clang::OK_Ordinary
An ordinary object is located at an address in memory.
Definition: Specifiers.h:126
clang::RecursiveASTVisitor
A class that does preorder or postorder depth-first traversal on the entire Clang AST and visits each...
Definition: RecursiveASTVisitor.h:151
clang::CXXRecordDecl::getDestructor
CXXDestructorDecl * getDestructor() const
Returns the destructor decl for this class.
Definition: DeclCXX.cpp:1697
clang::Sema::ActOnStartLinkageSpecification
Decl * ActOnStartLinkageSpecification(Scope *S, SourceLocation ExternLoc, Expr *LangStr, SourceLocation LBraceLoc)
ActOnStartLinkageSpecification - Parsed the beginning of a C++ linkage specification, including the language and (if present) the &#39;{&#39;.
Definition: SemaDeclCXX.cpp:13647
clang::EST_BasicNoexcept
noexcept
Definition: ExceptionSpecificationType.h:26
clang::DeclaratorChunk::FunctionTypeInfo
Definition: DeclSpec.h:1249
clang::ObjCInterfaceDecl
Represents an ObjC class declaration.
Definition: DeclObjC.h:1172
clang::CXXCtorInitializer::getMember
FieldDecl * getMember() const
If this is a member initializer, returns the declaration of the non-static data member being initiali...
Definition: DeclCXX.h:2392
clang::LinkageSpecDecl
Represents a linkage specification.
Definition: DeclCXX.h:2826
clang::Sema::BuildMemberReferenceExpr
ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, SourceLocation OpLoc, bool IsArrow, CXXScopeSpec &SS, SourceLocation TemplateKWLoc, NamedDecl *FirstQualifierInScope, const DeclarationNameInfo &NameInfo, const TemplateArgumentListInfo *TemplateArgs, const Scope *S, ActOnMemberAccessExtraArgs *ExtraArgs=nullptr)
Definition: SemaExprMember.cpp:741
clang::LookupResult::addDecl
void addDecl(NamedDecl *D)
Add a declaration to these results with its natural access.
Definition: Lookup.h:415
llvm::ArrayRef
Definition: LLVM.h:32
clang::Sema::LookupMemberName
Member name lookup, which finds the names of class/struct/union members.
Definition: Sema.h:3063
clang::DeclarationNameInfo::containsUnexpandedParameterPack
bool containsUnexpandedParameterPack() const
Determine whether this name contains an unexpanded parameter pack.
Definition: DeclarationName.cpp:408
clang::CXXRecordDecl::hasConstexprDefaultConstructor
bool hasConstexprDefaultConstructor() const
Determine whether this class has a constexpr default constructor.
Definition: DeclCXX.h:1392
clang::ClassTemplateDecl::getTemplatedDecl
CXXRecordDecl * getTemplatedDecl() const
Get the underlying class declarations of the template.
Definition: DeclTemplate.h:2103
clang::DeclSpec::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
Definition: DeclSpec.h:507
clang::CXXRecordDecl::isAbstract
bool isAbstract() const
Determine whether this class has a pure virtual function.
Definition: DeclCXX.h:1344
clang::Sema::ActOnFinishCXXMemberSpecification
void ActOnFinishCXXMemberSpecification(Scope *S, SourceLocation RLoc, Decl *TagDecl, SourceLocation LBrac, SourceLocation RBrac, const ParsedAttributesView &AttrList)
Definition: SemaDeclCXX.cpp:7907
llvm::SmallString
Definition: LLVM.h:35
clang::Sema::BuildDeclarationNameExpr
ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, LookupResult &R, bool NeedsADL, bool AcceptInvalidDecl=false)
Definition: SemaExpr.cpp:2784
clang::CanQual::getTypePtr
const T * getTypePtr() const
Retrieve the underlying type pointer, which refers to a canonical type.
Definition: CanonicalType.h:84
clang::UnresolvedLookupExpr::Create
static UnresolvedLookupExpr * Create(const ASTContext &Context, CXXRecordDecl *NamingClass, NestedNameSpecifierLoc QualifierLoc, const DeclarationNameInfo &NameInfo, bool RequiresADL, bool Overloaded, UnresolvedSetIterator Begin, UnresolvedSetIterator End)
Definition: ExprCXX.cpp:325
clang::FunctionProtoType::ExceptionSpecInfo::SourceDecl
FunctionDecl * SourceDecl
The function whose exception specification this is, for EST_Unevaluated and EST_Uninstantiated.
Definition: Type.h:3753
clang::Sema::checkInitializerLifetime
void checkInitializerLifetime(const InitializedEntity &Entity, Expr *Init)
Check that the lifetime of the initializer (and its subobjects) is sufficient for initializing the en...
Definition: SemaInit.cpp:6918
clang::TemplateSpecializationTypeLoc::getNumArgs
unsigned getNumArgs() const
Definition: TypeLoc.h:1580
clang::BindingDecl
A binding in a decomposition declaration.
Definition: DeclCXX.h:3795
ASTMutationListener.h
clang::Sema::ExpressionEvaluationContext::ConstantEvaluated
The current context is "potentially evaluated" in C++11 terms, but the expression is evaluated at com...
clang::FunctionProtoType::getTypeQuals
Qualifiers getTypeQuals() const
Definition: Type.h:4015
clang::CXXScopeSpec::getWithLocInContext
NestedNameSpecifierLoc getWithLocInContext(ASTContext &Context) const
Retrieve a nested-name-specifier with location information, copied into the given AST context...
Definition: DeclSpec.cpp:143
clang::Qualifiers::hasConst
bool hasConst() const
Definition: Type.h:258
clang::CXXConstructorDecl::init_begin
init_iterator init_begin()
Retrieve an iterator to the first initializer.
Definition: DeclCXX.h:2533
clang::Declarator::getIdentifier
IdentifierInfo * getIdentifier() const
Definition: DeclSpec.h:2127
clang::Sema::MarkVariableReferenced
void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var)
Mark a variable referenced, and check whether it is odr-used (C++ [basic.def.odr]p2, C99 6.9p3).
Definition: SemaExpr.cpp:15697
clang::Decl::IDNS_Ordinary
Ordinary names.
Definition: DeclBase.h:145
clang::IdentifierInfo::getLength
unsigned getLength() const
Efficiently return the length of this identifier info.
Definition: IdentifierTable.h:153
Template.h
clang::Decl::getCanonicalDecl
virtual Decl * getCanonicalDecl()
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclBase.h:870
clang::UnqualifiedIdKind::IK_Identifier
An identifier.
clang::Sema::getTrivialTemplateArgumentLoc
TemplateArgumentLoc getTrivialTemplateArgumentLoc(const TemplateArgument &Arg, QualType NTTPType, SourceLocation Loc)
Allocate a TemplateArgumentLoc where all locations have been initialized to the given location...
Definition: SemaTemplateDeduction.cpp:2444
CXXFieldCollector.h
clang::CXXConstructExpr::CK_Complete
Definition: ExprCXX.h:1267
clang::prec::Assignment
Definition: OperatorPrecedence.h:30
getTrivialIntegralTemplateArgument
static TemplateArgumentLoc getTrivialIntegralTemplateArgument(Sema &S, SourceLocation Loc, QualType T, uint64_t I)
Definition: SemaDeclCXX.cpp:988
clang::RecordDecl::getArgPassingRestrictions
ArgPassingKind getArgPassingRestrictions() const
Definition: Decl.h:3723
clang::Sema::SpecialMemberIsTrivial
bool SpecialMemberIsTrivial(CXXMethodDecl *MD, CXXSpecialMember CSM, TrivialABIHandling TAH=TAH_IgnoreTrivialABI, bool Diagnose=false)
Determine whether a defaulted or deleted special member function is trivial, as specified in C++11 [c...
Definition: SemaDeclCXX.cpp:7588
clang::RecordDecl::isAnonymousStructOrUnion
bool isAnonymousStructOrUnion() const
Whether this is an anonymous struct or union.
Definition: Decl.h:3666
clang::FunctionDecl::param_begin
param_iterator param_begin()
Definition: Decl.h:2274
clang::CXXThisExpr
Represents the this expression in C++.
Definition: ExprCXX.h:976
clang::Sema::BuildUsingShadowDecl
UsingShadowDecl * BuildUsingShadowDecl(Scope *S, UsingDecl *UD, NamedDecl *Target, UsingShadowDecl *PrevDecl)
Builds a shadow declaration corresponding to a &#39;using&#39; declaration.
Definition: SemaDeclCXX.cpp:9725
clang::LambdaExpr::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: ExprCXX.h:1857
clang::StringLiteralParser::isValidUDSuffix
static bool isValidUDSuffix(const LangOptions &LangOpts, StringRef Suffix)
Determine whether a suffix is a valid ud-suffix.
Definition: LiteralSupport.cpp:1890
clang::AS_none
Definition: Specifiers.h:102
clang::DeclContext::lookup
lookup_result lookup(DeclarationName Name) const
lookup - Find the declarations (if any) with the given Name in this context.
Definition: DeclBase.cpp:1595
clang::NestedNameSpecifierLocBuilder
Class that aids in the construction of nested-name-specifiers along with source-location information ...
Definition: NestedNameSpecifier.h:350
clang::FunctionType::ExtInfo::withCallingConv
ExtInfo withCallingConv(CallingConv cc) const
Definition: Type.h:3571
buildSingleCopyAssign
static StmtResult buildSingleCopyAssign(Sema &S, SourceLocation Loc, QualType T, const ExprBuilder &To, const ExprBuilder &From, bool CopyingBaseSubobject, bool Copying)
Definition: SemaDeclCXX.cpp:11782
clang::TemplateIdAnnotation::LAngleLoc
SourceLocation LAngleLoc
The location of the &#39;<&#39; before the template argument list.
Definition: ParsedTemplate.h:178
clang::FieldDecl::removeInClassInitializer
void removeInClassInitializer()
Remove the C++11 in-class initializer from this member.
Definition: Decl.h:2740
clang::FunctionDecl::getPrimaryTemplate
FunctionTemplateDecl * getPrimaryTemplate() const
Retrieve the primary template that this function template specialization either specializes or was in...
Definition: Decl.cpp:3455
canPassInRegisters
static bool canPassInRegisters(Sema &S, CXXRecordDecl *D, TargetInfo::CallingConvKind CCK)
Determine whether a type is permitted to be passed or returned in registers, per C++ [class...
Definition: SemaDeclCXX.cpp:5888
clang::Sema::getDiagnostics
DiagnosticsEngine & getDiagnostics() const
Definition: Sema.h:1235
checkArrayDecomposition
static bool checkArrayDecomposition(Sema &S, ArrayRef< BindingDecl *> Bindings, ValueDecl *Src, QualType DecompType, const ConstantArrayType *CAT)
Definition: SemaDeclCXX.cpp:886
clang::VirtSpecifiers::isFinalSpecified
bool isFinalSpecified() const
Definition: DeclSpec.h:2520
clang::Sema::ActOnCXXExitDeclInitializer
void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl)
ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an initializer for the declaratio...
Definition: SemaDeclCXX.cpp:14935
clang::Sema::CXXSpecialMember
CXXSpecialMember
Kinds of C++ special members.
Definition: Sema.h:1167
Parent
NodeId Parent
Definition: ASTDiff.cpp:192
clang::Scope::getFlags
unsigned getFlags() const
getFlags - Return the flags for this scope.
Definition: Scope.h:218
clang::Sema::CheckTemplateIdType
QualType CheckTemplateIdType(TemplateName Template, SourceLocation TemplateLoc, TemplateArgumentListInfo &TemplateArgs)
Definition: SemaTemplate.cpp:3134
clang::Sema::BuildMemInitializer
MemInitResult BuildMemInitializer(Decl *ConstructorD, Scope *S, CXXScopeSpec &SS, IdentifierInfo *MemberOrBase, ParsedType TemplateTypeTy, const DeclSpec &DS, SourceLocation IdLoc, Expr *Init, SourceLocation EllipsisLoc)
Handle a C++ member initializer.
Definition: SemaDeclCXX.cpp:3820
clang::Sema::findInheritingConstructor
CXXConstructorDecl * findInheritingConstructor(SourceLocation Loc, CXXConstructorDecl *BaseCtor, ConstructorUsingShadowDecl *DerivedShadow)
Given a derived-class using shadow declaration for a constructor and the correspnding base class cons...
Definition: SemaDeclCXX.cpp:11044
clang::DeclaratorChunk::Reference
Definition: DeclSpec.h:1150
clang::driver::tools::arm::ReadTPMode::Invalid
clang::CXXRecordDecl::setBases
void setBases(CXXBaseSpecifier const *const *Bases, unsigned NumBases)
Sets the base classes of this struct or class.
Definition: DeclCXX.cpp:185
clang::ParsedAttr::isDeclspecPropertyAttribute
bool isDeclspecPropertyAttribute() const
Is this the Microsoft __declspec(property) attribute?
Definition: ParsedAttr.h:394
clang::Decl::hasAttr
bool hasAttr() const
Definition: DeclBase.h:531
clang::CXXConstructorDecl::getCanonicalDecl
CXXConstructorDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: DeclCXX.h:2684
clang::CXXRecordDecl::hasUserProvidedDefaultConstructor
bool hasUserProvidedDefaultConstructor() const
Whether this class has a user-provided default constructor per C++11.
Definition: DeclCXX.h:989
clang::ConditionalOperator
ConditionalOperator - The ?: ternary operator.
Definition: Expr.h:3582
clang::Declarator::getMutableDeclSpec
DeclSpec & getMutableDeclSpec()
getMutableDeclSpec - Return a non-const version of the DeclSpec.
Definition: DeclSpec.h:1861
clang::CXXRecordDecl::isTriviallyCopyable
bool isTriviallyCopyable() const
Determine whether this class is considered trivially copyable per (C++11 [class]p6).
Definition: DeclCXX.cpp:533
clang::Sema
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:278
clang::StringLiteral::getString
StringRef getString() const
Definition: Expr.h:1649
clang::DeclaratorChunk::Kind
enum clang::DeclaratorChunk::@215 Kind
clang::TypeAliasDecl
Represents the declaration of a typedef-name via a C++11 alias-declaration.
Definition: Decl.h:3038
clang::CompoundStmt
CompoundStmt - This represents a group of statements like { stmt stmt }.
Definition: Stmt.h:1241
clang::Type::getAsCXXRecordDecl
CXXRecordDecl * getAsCXXRecordDecl() const
Retrieves the CXXRecordDecl that this type refers to, either because the type is a RecordType or beca...
Definition: Type.cpp:1613
clang::DeclSpec::getUnalignedSpecLoc
SourceLocation getUnalignedSpecLoc() const
Definition: DeclSpec.h:552
clang::FunctionProtoType
Represents a prototype with parameter type info, e.g.
Definition: Type.h:3687
clang::TargetInfo::getCallingConvKind
virtual CallingConvKind getCallingConvKind(bool ClangABICompat4) const
Definition: TargetInfo.cpp:399
clang::CXXScopeSpec::MakeTrivial
void MakeTrivial(ASTContext &Context, NestedNameSpecifier *Qualifier, SourceRange R)
Make a new nested-name-specifier from incomplete source-location information.
Definition: DeclSpec.cpp:119
clang::CXXRecordDecl::isDynamicClass
bool isDynamicClass() const
Definition: DeclCXX.h:789
clang::DeclSpec::ClearConstexprSpec
void ClearConstexprSpec()
Definition: DeclSpec.h:730
clang::FunctionDecl::setImplicitlyInline
void setImplicitlyInline(bool I=true)
Flag that this function is implicitly inline.
Definition: Decl.h:2351
clang::Sema::CreateBuiltinBinOp
ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr)
CreateBuiltinBinOp - Creates a new built-in binary operation with operator Opc at location TokLoc...
Definition: SemaExpr.cpp:12242
clang::UnqualifiedId::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclSpec.h:1137
clang::Sema::ActOnFinishCXXMemberDecls
void ActOnFinishCXXMemberDecls()
Perform any semantic analysis which needs to be delayed until all pending class member declarations h...
Definition: SemaDeclCXX.cpp:11317
clang::FunctionDecl::getOverloadedOperator
OverloadedOperatorKind getOverloadedOperator() const
getOverloadedOperator - Which C++ overloaded operator this function represents, if any...
Definition: Decl.cpp:3300
clang::CXXConstructExpr::getConstructor
CXXConstructorDecl * getConstructor() const
Get the constructor that this expression will (ultimately) call.
Definition: ExprCXX.h:1334
clang::Sema::DefineImplicitCopyAssignment
void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, CXXMethodDecl *MethodDecl)
Defines an implicitly-declared copy assignment operator.
Definition: SemaDeclCXX.cpp:11924
clang::ASTContext::NumImplicitCopyConstructors
static unsigned NumImplicitCopyConstructors
The number of implicitly-declared copy constructors.
Definition: ASTContext.h:2795
clang::Declarator::isDeclarationOfFunction
bool isDeclarationOfFunction() const
Determine whether the declaration that will be produced from this declaration will be a function...
Definition: DeclSpec.cpp:313
clang::Sema::CompoundScopeRAII
A RAII object to enter scope of a compound statement.
Definition: Sema.h:3715
clang::QualType::isMoreQualifiedThan
bool isMoreQualifiedThan(QualType Other) const
Determine whether this type is more qualified than the other given type, requiring exact equality for...
Definition: Type.h:6216
clang::Sema::isStdInitializerList
bool isStdInitializerList(QualType Ty, QualType *Element)
Tests whether Ty is an instance of std::initializer_list and, if it is and Element is not NULL...
Definition: SemaDeclCXX.cpp:9178
clang::CXXRecordDecl::getTemplateSpecializationKind
TemplateSpecializationKind getTemplateSpecializationKind() const
Determine whether this particular class is a specialization or instantiation of a class template or m...
Definition: DeclCXX.cpp:1627
clang::DeclaratorDecl
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:689
clang::TypeLoc::getLocalSourceRange
SourceRange getLocalSourceRange() const
Get the local source range.
Definition: TypeLoc.h:157
clang::ComparisonCategories::getCategoryString
static StringRef getCategoryString(ComparisonCategoryType Kind)
Definition: ComparisonCategories.cpp:151
ComputeDefaultedSpecialMemberExceptionSpec
static Sema::ImplicitExceptionSpecification ComputeDefaultedSpecialMemberExceptionSpec(Sema &S, SourceLocation Loc, CXXMethodDecl *MD, Sema::CXXSpecialMember CSM, Sema::InheritedConstructorInfo *ICI)
Definition: SemaDeclCXX.cpp:10813
clang::CXXCtorInitializer::isDelegatingInitializer
bool isDelegatingInitializer() const
Determine whether this initializer is creating a delegating constructor.
Definition: DeclCXX.h:2353
clang::ImplicitCastExpr::Create
static ImplicitCastExpr * Create(const ASTContext &Context, QualType T, CastKind Kind, Expr *Operand, const CXXCastPath *BasePath, ExprValueKind Cat)
Definition: Expr.cpp:1844
clang::Sema::AbstractReturnType
Definition: Sema.h:6115
clang::DeclaratorChunk::FunctionTypeInfo::MethodQualifiers
DeclSpec * MethodQualifiers
DeclSpec for the function with the qualifier related info.
Definition: DeclSpec.h:1316
clang::ASTContext::DeclarationNames
DeclarationNameTable DeclarationNames
Definition: ASTContext.h:569
clang::DeclaratorChunk::FunctionTypeInfo::NumParams
unsigned NumParams
NumParams - This is the number of formal parameters specified by the declarator.
Definition: DeclSpec.h:1288
clang::Sema::SpecialMemberCache
llvm::FoldingSet< SpecialMemberOverloadResultEntry > SpecialMemberCache
A cache of special member function overload resolution results for C++ records.
Definition: Sema.h:1097
clang::CXXRecordDecl::hasTrivialMoveConstructorForCall
bool hasTrivialMoveConstructorForCall() const
Definition: DeclCXX.h:1428
clang::QualType::hasQualifiers
bool hasQualifiers() const
Determine whether this type has any qualifiers.
Definition: Type.h:6147
clang::Sema::NoteHiddenVirtualMethods
void NoteHiddenVirtualMethods(CXXMethodDecl *MD, SmallVectorImpl< CXXMethodDecl *> &OverloadedMethods)
Definition: SemaDeclCXX.cpp:7833
clang::Declarator::mayHaveDecompositionDeclarator
bool mayHaveDecompositionDeclarator() const
Return true if the context permits a C++17 decomposition declarator.
Definition: DeclSpec.h:2012
clang::EmptyDecl::Create
static EmptyDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation L)
Definition: Decl.cpp:4616
clang::UnqualifiedIdKind::IK_ConversionFunctionId
A conversion function name, e.g., operator int.
clang::CXXScopeSpec::getRange
SourceRange getRange() const
Definition: DeclSpec.h:68
clang::CharUnits::getQuantity
QuantityType getQuantity() const
getQuantity - Get the raw integer representation of this quantity.
Definition: CharUnits.h:179
clang::VarDecl::isInlineSpecified
bool isInlineSpecified() const
Definition: Decl.h:1367
clang::ASTContext::getTrivialTypeSourceInfo
TypeSourceInfo * getTrivialTypeSourceInfo(QualType T, SourceLocation Loc=SourceLocation()) const
Allocate a TypeSourceInfo where all locations have been initialized to a given location, which defaults to the empty location.
Definition: ASTContext.cpp:2600
clang::Sema::CTK_ErrorRecovery
Definition: Sema.h:3273
clang::StaticAssertDecl::Create
static StaticAssertDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StaticAssertLoc, Expr *AssertExpr, StringLiteral *Message, SourceLocation RParenLoc, bool Failed)
Definition: DeclCXX.cpp:2833
clang::CXXRecordDecl::isLiteral
bool isLiteral() const
Determine whether this class is a literal type.
Definition: DeclCXX.h:1566
clang::FieldDecl::setInClassInitializer
void setInClassInitializer(Expr *Init)
Set the C++11 in-class initializer for this member.
Definition: Decl.h:2731
clang::ConstructorUsingShadowDecl::getParent
const CXXRecordDecl * getParent() const
Returns the parent of this using shadow declaration, which is the class in which this is declared...
Definition: DeclCXX.h:3296
clang::Sema::ActOnReenterCXXMethodParameter
void ActOnReenterCXXMethodParameter(Scope *S, ParmVarDecl *Param)
This is used to implement the constant expression evaluation part of the attribute enable_if extensio...
Definition: SemaDeclCXX.cpp:8076
clang::Sema::BuildMemberInitializer
MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr *Init, SourceLocation IdLoc)
Definition: SemaDeclCXX.cpp:3991
clang::DeclSpec::getTypeSpecType
TST getTypeSpecType() const
Definition: DeclSpec.h:483
clang::CXXBaseSpecifier::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclCXX.h:236
diagnoseDeprecatedCopyOperation
static void diagnoseDeprecatedCopyOperation(Sema &S, CXXMethodDecl *CopyOp)
Diagnose an implicit copy operation for a class which is odr-used, but which is deprecated because th...
Definition: SemaDeclCXX.cpp:11882
clang::TargetCXXABI::hasKeyFunctions
bool hasKeyFunctions() const
Does this ABI use key functions? If so, class data such as the vtable is emitted with strong linkage ...
Definition: TargetCXXABI.h:227
clang::CXXRecordDecl::hasInheritedConstructor
bool hasInheritedConstructor() const
Determine whether this class has a using-declaration that names a user-declared base class constructo...
Definition: DeclCXX.h:1526
lookupCallFromSpecialMember
static Sema::SpecialMemberOverloadResult lookupCallFromSpecialMember(Sema &S, CXXRecordDecl *Class, Sema::CXXSpecialMember CSM, unsigned FieldQuals, bool ConstRHS)
Look up the special member function that would be called by a special member function for a subobject...
Definition: SemaDeclCXX.cpp:6204
clang::Expr::HasSideEffects
bool HasSideEffects(const ASTContext &Ctx, bool IncludePossibleEffects=true) const
HasSideEffects - This routine returns true for all those expressions which have any effect other than...
Definition: Expr.cpp:3101
clang::CXXDestructorDecl::Create
static CXXDestructorDecl * Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo, bool isInline, bool isImplicitlyDeclared)
Definition: DeclCXX.cpp:2465
clang::Sema::SpecialMemberDecl
llvm::PointerIntPair< CXXRecordDecl *, 3, CXXSpecialMember > SpecialMemberDecl
Definition: Sema.h:1178
clang::RecordDecl::isMsStruct
bool isMsStruct(const ASTContext &C) const
Get whether or not this is an ms_struct which can be turned on with an attribute, pragma...
Definition: Decl.cpp:4162
clang::Sema::isUsualDeallocationFunction
bool isUsualDeallocationFunction(const CXXMethodDecl *FD)
Definition: SemaExprCXX.cpp:1450
clang::FunctionDecl::setTrivialForCall
void setTrivialForCall(bool IT)
Definition: Decl.h:2030
clang::DeclaratorChunk::Paren
Definition: DeclSpec.h:1150
checkComplexDecomposition
static bool checkComplexDecomposition(Sema &S, ArrayRef< BindingDecl *> Bindings, ValueDecl *Src, QualType DecompType, const ComplexType *CT)
Definition: SemaDeclCXX.cpp:903
clang::TypeLoc::getBeginLoc
SourceLocation getBeginLoc() const
Get the begin source location.
Definition: TypeLoc.cpp:190
checkArrayLikeDecomposition
static bool checkArrayLikeDecomposition(Sema &S, ArrayRef< BindingDecl *> Bindings, ValueDecl *Src, QualType DecompType, const llvm::APSInt &NumElems, QualType ElemType)
Definition: SemaDeclCXX.cpp:871
TypeOrdering.h
Allows QualTypes to be sorted and hence used in maps and sets.
clang::Sema::ActOnStaticAssertDeclaration
Decl * ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, Expr *AssertExpr, Expr *AssertMessageExpr, SourceLocation RParenLoc)
Definition: SemaDeclCXX.cpp:13887
clang::TemplateDecl::getTemplateParameters
TemplateParameterList * getTemplateParameters() const
Get the list of template parameters.
Definition: DeclTemplate.h:432
clang::ComplexType::getElementType
QualType getElementType() const
Definition: Type.h:2490
clang::Sema::checkThisInStaticMemberFunctionExceptionSpec
bool checkThisInStaticMemberFunctionExceptionSpec(CXXMethodDecl *Method)
Whether this&#39; shows up in the exception specification of a static member function.
Definition: SemaDeclCXX.cpp:15373
clang::FunctionDecl::isInlineSpecified
bool isInlineSpecified() const
Determine whether the "inline" keyword was specified for this function.
Definition: Decl.h:2342
clang::ConstructorUsingShadowDecl
Represents a shadow constructor declaration introduced into a class by a C++11 using-declaration that...
Definition: DeclCXX.h:3240
clang::TagDecl::isDependentType
bool isDependentType() const
Whether this declaration declares a type that is dependent, i.e., a type that somehow depends on temp...
Definition: Decl.h:3220
clang::ValueDecl
Represent the declaration of a variable (in which case it is an lvalue) a function (in which case it ...
Definition: Decl.h:637
clang::Expr
This represents one expression.
Definition: Expr.h:106
clang::CXXConstructorDecl::isCopyOrMoveConstructor
bool isCopyOrMoveConstructor(unsigned &TypeQuals) const
Determine whether this is a copy or move constructor.
Definition: DeclCXX.cpp:2376
clang::UsingDecl::getQualifierLoc
NestedNameSpecifierLoc getQualifierLoc() const
Retrieve the nested-name-specifier that qualifies the name, with source-location information.
Definition: DeclCXX.h:3392
clang::TagDecl::getKindName
StringRef getKindName() const
Definition: Decl.h:3239
clang::ReferenceType::getPointeeType
QualType getPointeeType() const
Definition: Type.h:2694
clang::Sema::DefineImplicitCopyConstructor
void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, CXXConstructorDecl *Constructor)
DefineImplicitCopyConstructor - Checks for feasibility of defining this constructor as the copy const...
Definition: SemaDeclCXX.cpp:12585
clang::ExprValueKind
ExprValueKind
The categorization of expression values, currently following the C++11 scheme.
Definition: Specifiers.h:107
clang::FunctionDecl::isVariadic
bool isVariadic() const
Whether this function is variadic.
Definition: Decl.cpp:2689
clang::FunctionDecl::isDefaulted
bool isDefaulted() const
Whether this function is defaulted per C++0x.
Definition: Decl.h:2034
clang::getAsString
llvm::StringRef getAsString(SyncScope S)
Definition: SyncScope.h:51
llvm::MutableArrayRef
Definition: LLVM.h:33
clang::Scope::isDeclScope
bool isDeclScope(Decl *D)
isDeclScope - Return true if this is the scope that the specified decl is declared in...
Definition: Scope.h:321
clang::Sema::ImplicitExceptionSpecification
Helper class that collects exception specifications for implicitly-declared special member functions...
Definition: Sema.h:4751
clang::SourceManager::isInSystemHeader
bool isInSystemHeader(SourceLocation Loc) const
Returns if a SourceLocation is in a system header.
Definition: SourceManager.h:1445
DiagnoseBaseOrMemInitializerOrder
static void DiagnoseBaseOrMemInitializerOrder(Sema &SemaRef, const CXXConstructorDecl *Constructor, ArrayRef< CXXCtorInitializer *> Inits)
Definition: SemaDeclCXX.cpp:4916
clang::Declarator::isDecompositionDeclarator
bool isDecompositionDeclarator() const
Return whether this declarator is a decomposition declarator.
Definition: DeclSpec.h:2123
clang::Sema::BuildBasePathArray
void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath)
Definition: SemaDeclCXX.cpp:2586
Previous
StateNode * Previous
Definition: UnwrappedLineFormatter.cpp:879
clang::TemplateTypeParmDecl
Declaration of a template type parameter.
Definition: DeclTemplate.h:1158
clang::TemplateTypeParmType::getIndex
unsigned getIndex() const
Definition: Type.h:4566
clang::Scope::getEntity
DeclContext * getEntity() const
Definition: Scope.h:325
clang::CXXRecordDecl::defaultedMoveConstructorIsDeleted
bool defaultedMoveConstructorIsDeleted() const
true if a defaulted move constructor for this class would be deleted.
Definition: DeclCXX.h:921
clang::UsingDecl::getNameInfo
DeclarationNameInfo getNameInfo() const
Definition: DeclCXX.h:3399
clang::LookupResult::setHideTags
void setHideTags(bool Hide)
Sets whether tag declarations should be hidden by non-tag declarations during resolution.
Definition: Lookup.h:286
DeclSpec.h
This file defines the classes used to store parsed information about declaration-specifiers and decla...
IsTupleLike
IsTupleLike
Definition: SemaDeclCXX.cpp:999
clang::Type::castAs
const T * castAs() const
Member-template castAs<specific type>.
Definition: Type.h:6811
clang::ElaboratedTypeKeyword
ElaboratedTypeKeyword
The elaboration keyword that precedes a qualified type name or introduces an elaborated-type-specifie...
Definition: Type.h:5050
clang::CXXRecordDecl::getFinalOverriders
void getFinalOverriders(CXXFinalOverriderMap &FinaOverriders) const
Retrieve the final overriders for each virtual member function in the class hierarchy where this clas...
Definition: CXXInheritance.cpp:718
clang::NestedNameSpecifierLoc::getBeginLoc
SourceLocation getBeginLoc() const
Retrieve the location of the beginning of this nested-name-specifier.
Definition: NestedNameSpecifier.h:293
clang::DeclaratorChunk::ParamInfo::Param
Decl * Param
Definition: DeclSpec.h:1227
clang::NamespaceDecl::setRBraceLoc
void setRBraceLoc(SourceLocation L)
Definition: Decl.h:621
Inits
Inits[]
Definition: OpenMPClause.h:151
checkVectorDecomposition
static bool checkVectorDecomposition(Sema &S, ArrayRef< BindingDecl *> Bindings, ValueDecl *Src, QualType DecompType, const VectorType *VT)
Definition: SemaDeclCXX.cpp:894
clang::InitializedEntity::InitializeVariable
static InitializedEntity InitializeVariable(VarDecl *Var)
Create the initialization entity for a variable.
Definition: Initialization.h:244
clang::UnionOpaquePtr::get
OpaquePtr< T > get() const
Definition: Ownership.h:105
clang::UnresolvedUsingValueDecl::Create
static UnresolvedUsingValueDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc, NestedNameSpecifierLoc QualifierLoc, const DeclarationNameInfo &NameInfo, SourceLocation EllipsisLoc)
Definition: DeclCXX.cpp:2784
clang::CXXThisExpr::getLocation
SourceLocation getLocation() const
Definition: ExprCXX.h:991
clang::TypeLoc::getAs
T getAs() const
Convert to the specified TypeLoc type, returning a null TypeLoc if this TypeLoc is not of the desired...
Definition: TypeLoc.h:87
clang::CXXDestructorDecl
Represents a C++ destructor within a class.
Definition: DeclCXX.h:2706
clang::DeclaratorChunk::FunctionTypeInfo::freeParams
void freeParams()
Reset the parameter list to having zero parameters.
Definition: DeclSpec.h:1348
clang::VarDecl::setInit
void setInit(Expr *I)
Definition: Decl.cpp:2205
clang::CallExpr::getCallee
Expr * getCallee()
Definition: Expr.h:2514
clang::Decl::setInvalidDecl
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:132
clang::DeclarationName::getAsString
std::string getAsString() const
Retrieve the human-readable string for this name.
Definition: DeclarationName.cpp:229
clang::InitListExpr::getNumInits
unsigned getNumInits() const
Definition: Expr.h:4215
clang::ASTContext::NumImplicitMoveConstructors
static unsigned NumImplicitMoveConstructors
The number of implicitly-declared move constructors.
Definition: ASTContext.h:2802
clang::Sema::CheckStructuredBindingMemberAccess
AccessResult CheckStructuredBindingMemberAccess(SourceLocation UseLoc, CXXRecordDecl *DecomposedClass, DeclAccessPair Field)
Checks implicit access to a member in a structured binding.
Definition: SemaAccess.cpp:1733
clang::DeclSpec::getVolatileSpecLoc
SourceLocation getVolatileSpecLoc() const
Definition: DeclSpec.h:550
Lookup.h
clang::DeclSpec::getThreadStorageClassSpecLoc
SourceLocation getThreadStorageClassSpecLoc() const
Definition: DeclSpec.h:461
clang::Decl::isImplicit
bool isImplicit() const
isImplicit - Indicates whether the declaration was implicitly generated by the implementation.
Definition: DeclBase.h:547
clang::CXXRecordDecl::getTemplateInstantiationPattern
const CXXRecordDecl * getTemplateInstantiationPattern() const
Retrieve the record declaration from which this record could be instantiated.
Definition: DeclCXX.cpp:1652
clang::FunctionDecl::getTemplateSpecializationArgs
const TemplateArgumentList * getTemplateSpecializationArgs() const
Retrieve the template arguments used to produce this function template specialization from the primar...
Definition: Decl.cpp:3475
clang::DeclContextLookupResult::size
size_t size() const
Definition: DeclBase.h:1233
clang::ASTContext::getTagDeclType
QualType getTagDeclType(const TagDecl *Decl) const
Return the unique reference to the type for the specified TagDecl (struct/union/class/enum) decl...
Definition: ASTContext.cpp:4948
clang::Sema::PushUsingDirective
void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir)
Definition: SemaDeclCXX.cpp:9442
clang::LinkageSpecDecl::setRBraceLoc
void setRBraceLoc(SourceLocation L)
Definition: DeclCXX.h:2877
Preprocessor.h
Defines the clang::Preprocessor interface.
clang::Sema::CheckInheritingConstructorUsingDecl
bool CheckInheritingConstructorUsingDecl(UsingDecl *UD)
Additional checks for a using declaration referring to a constructor name.
Definition: SemaDeclCXX.cpp:10189
clang::CXXRecordDecl::hasUserDeclaredMoveAssignment
bool hasUserDeclaredMoveAssignment() const
Determine whether this class has had a move assignment declared by the user.
Definition: DeclCXX.h:1139
clang::Sema::VerifyIntegerConstantExpression
ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, VerifyICEDiagnoser &Diagnoser, bool AllowFold=true)
VerifyIntegerConstantExpression - Verifies that an expression is an ICE, and reports the appropriate ...
Definition: SemaExpr.cpp:14220
clang::RecordDecl::field_end
field_iterator field_end() const
Definition: Decl.h:3787
clang::ClassTemplateSpecializationDecl::getSpecializedTemplate
ClassTemplateDecl * getSpecializedTemplate() const
Retrieve the template that this specialization specializes.
Definition: DeclTemplate.cpp:781
clang::Sema::NoteDeletedInheritingConstructor
void NoteDeletedInheritingConstructor(CXXConstructorDecl *CD)
Definition: SemaDeclCXX.cpp:11124
clang::CXXMethodDecl::overridden_methods
overridden_method_range overridden_methods() const
Definition: DeclCXX.cpp:2170
clang::Decl::isLocalExternDecl
bool isLocalExternDecl()
Determine whether this is a block-scope declaration with linkage.
Definition: DeclBase.h:1053
clang::DeclContext::isFileContext
bool isFileContext() const
Definition: DeclBase.h:1818
clang::CXXScopeSpec::getBeginLoc
SourceLocation getBeginLoc() const
Definition: DeclSpec.h:72
clang::Decl::getDeclContext
DeclContext * getDeclContext()
Definition: DeclBase.h:427
clang::CXXRecordDecl::getDefinition
CXXRecordDecl * getDefinition() const
Definition: DeclCXX.h:769
clang::DeclSpec::isConstexprSpecified
bool isConstexprSpecified() const
Definition: DeclSpec.h:727
clang::DecompositionDeclarator
A parsed C++17 decomposition declarator of the form &#39;[&#39; identifier-list &#39;]&#39;.
Definition: DeclSpec.h:1664
clang::Sema::BuildCXXNamedCast
ExprResult BuildCXXNamedCast(SourceLocation OpLoc, tok::TokenKind Kind, TypeSourceInfo *Ty, Expr *E, SourceRange AngleBrackets, SourceRange Parens)
Definition: SemaCast.cpp:258
clang::TypeWithKeyword::getTagTypeKindForTypeSpec
static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec)
Converts a type specifier (DeclSpec::TST) into a tag type kind.
Definition: Type.cpp:2527
clang::Sema::ActOnFinishCXXInClassMemberInitializer
void ActOnFinishCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, Expr *Init)
This is invoked after parsing an in-class initializer for a non-static C++ class member, and after instantiating an in-class initializer in a class template.
Definition: SemaDeclCXX.cpp:3645
clang::CXXRecordDecl::hasAnyDependentBases
bool hasAnyDependentBases() const
Determine whether this class has any dependent base classes which are not the current instantiation...
Definition: DeclCXX.cpp:526
clang::ASTMutationListener
An abstract interface that should be implemented by listeners that want to be notified when an AST en...
Definition: ASTMutationListener.h:47
clang::Sema::ActOnEmptyDeclaration
Decl * ActOnEmptyDeclaration(Scope *S, const ParsedAttributesView &AttrList, SourceLocation SemiLoc)
Handle a C++11 empty-declaration and attribute-declaration.
Definition: SemaDeclCXX.cpp:13694
clang::CXXTryStmt
CXXTryStmt - A C++ try block, including all handlers.
Definition: StmtCXX.h:65
clang::FunctionDecl::getStorageClass
StorageClass getStorageClass() const
Returns the storage class as written in the source.
Definition: Decl.h:2331
Scope.h
DefineImplicitSpecialMember
static void DefineImplicitSpecialMember(Sema &S, CXXMethodDecl *MD, SourceLocation DefaultLoc)
Definition: SemaDeclCXX.cpp:5859
clang::NonTypeTemplateParmDecl
NonTypeTemplateParmDecl - Declares a non-type template parameter, e.g., "Size" in.
Definition: DeclTemplate.h:1261
clang::Decl::isTemplateParameter
bool isTemplateParameter() const
isTemplateParameter - Determines whether this declaration is a template parameter.
Definition: DeclBase.h:2422
clang::Decl::isTemplateParameterPack
bool isTemplateParameterPack() const
isTemplateParameter - Determines whether this declaration is a template parameter pack...
Definition: DeclBase.cpp:201
clang::Sema::ActOnDelayedCXXMethodParameter
void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param)
ActOnDelayedCXXMethodParameter - We&#39;ve already started a delayed C++ method declaration.
Definition: SemaDeclCXX.cpp:8101
clang::TemplateName
Represents a C++ template name within the type system.
Definition: TemplateName.h:179
clang::Sema::ActOnAccessSpecifier
bool ActOnAccessSpecifier(AccessSpecifier Access, SourceLocation ASLoc, SourceLocation ColonLoc, const ParsedAttributesView &Attrs)
ActOnAccessSpecifier - Parsed an access specifier followed by a colon.
Definition: SemaDeclCXX.cpp:2734
clang::CXXRecordDecl::needsImplicitDestructor
bool needsImplicitDestructor() const
Determine whether this class needs an implicit destructor to be lazily declared.
Definition: DeclCXX.h:1185
clang::DeclaratorChunk::Array
Definition: DeclSpec.h:1150
clang::Sema::RequireCompleteType
bool RequireCompleteType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Ensure that the type T is a complete type.
Definition: SemaType.cpp:7603
clang::DeclSpec::getStorageClassSpecLoc
SourceLocation getStorageClassSpecLoc() const
Definition: DeclSpec.h:460
TypeLoc.h
Defines the clang::TypeLoc interface and its subclasses.
Depth
int Depth
Definition: ASTDiff.cpp:191
clang::UnqualifiedId::getKind
UnqualifiedIdKind getKind() const
Determine what kind of name we have.
Definition: DeclSpec.h:1016
clang::Sema::DiscardCleanupsInEvaluationContext
void DiscardCleanupsInEvaluationContext()
Definition: SemaExpr.cpp:14538
clang::RecordDecl::APK_CannotPassInRegs
The argument of this type cannot be passed directly in registers.
Definition: Decl.h:3613
clang::DeclarationName::getAsIdentifierInfo
IdentifierInfo * getAsIdentifierInfo() const
Retrieve the IdentifierInfo * stored in this declaration name, or null if this declaration name isn&#39;t...
Definition: DeclarationName.h:411
clang::Decl::setModulePrivate
void setModulePrivate()
Specify that this declaration was marked as being private to the module in which it was defined...
Definition: DeclBase.h:614
clang::Sema::propagateDLLAttrToBaseClassTemplate
void propagateDLLAttrToBaseClassTemplate(CXXRecordDecl *Class, Attr *ClassAttr, ClassTemplateSpecializationDecl *BaseTemplateSpec, SourceLocation BaseLoc)
Perform propagation of DLL attributes from a derived class to a templated base class for MS compatibi...
Definition: SemaDeclCXX.cpp:5801
clang::CXXRecordDecl::isPolymorphic
bool isPolymorphic() const
Whether this class is polymorphic (C++ [class.virtual]), which means that the class contains or inher...
Definition: DeclCXX.h:1337
clang::Expr::isTemporaryObject
bool isTemporaryObject(ASTContext &Ctx, const CXXRecordDecl *TempTy) const
Determine whether the result of this expression is a temporary object of the given class type...
Definition: Expr.cpp:2800
clang::FunctionDecl::hasBody
bool hasBody(const FunctionDecl *&Definition) const
Returns true if the function has a body.
Definition: Decl.cpp:2695
clang::CXXBaseSpecifier::setInheritConstructors
void setInheritConstructors(bool Inherit=true)
Set that this base class&#39;s constructors should be inherited.
Definition: DeclCXX.h:258
clang::SourceRange::isInvalid
bool isInvalid() const
Definition: SourceLocation.h:214
clang::Expr::getType
QualType getType() const
Definition: Expr.h:128
clang::DeclContext::isFunctionOrMethod
bool isFunctionOrMethod() const
Definition: DeclBase.h:1800
clang::Expr::isPotentialConstantExpr
static bool isPotentialConstantExpr(const FunctionDecl *FD, SmallVectorImpl< PartialDiagnosticAt > &Diags)
isPotentialConstantExpr - Return true if this function&#39;s definition might be usable in a constant exp...
Definition: ExprConstant.cpp:11661
clang::StorageClass
StorageClass
Storage classes.
Definition: Specifiers.h:206
clang::Sema::CXXCopyAssignment
Definition: Sema.h:1171
clang::CXXRecordDecl::hasNonTrivialDestructor
bool hasNonTrivialDestructor() const
Determine whether this class has a non-trivial destructor (C++ [class.dtor]p3)
Definition: DeclCXX.h:1488
clang::Sema::DefineImplicitMoveAssignment
void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, CXXMethodDecl *MethodDecl)
Defines an implicitly-declared move assignment operator.
Definition: SemaDeclCXX.cpp:12286
clang::Sema::CheckCompletedCXXClass
void CheckCompletedCXXClass(CXXRecordDecl *Record)
Perform semantic checks on a class definition that has been completing, introducing implicitly-declar...
Definition: SemaDeclCXX.cpp:6000
clang::DeclSpec::TQ_const
Definition: DeclSpec.h:315
clang::CXXMethodDecl::getTypeQualifiers
Qualifiers getTypeQualifiers() const
Definition: DeclCXX.h:2188
clang::DiagnosticLevelMask::Error
StmtVisitor.h
clang::DeclarationName::isIdentifier
bool isIdentifier() const
Predicate functions for querying what type of name this is.
Definition: DeclarationName.h:376
clang::LookupResult::isSingleResult
bool isSingleResult() const
Determines if this names a single result which is not an unresolved value using decl.
Definition: Lookup.h:297
clang::DeclaratorContext::ConditionContext
clang::InClassInitStyle
InClassInitStyle
In-class initialization styles for non-static data members.
Definition: Specifiers.h:229
clang::DeclarationNameTable::getCXXOperatorName
DeclarationName getCXXOperatorName(OverloadedOperatorKind Op)
Get the name of the overloadable C++ operator corresponding to Op.
Definition: DeclarationName.h:640
clang::TypeAliasTemplateDecl
Declaration of an alias template.
Definition: DeclTemplate.h:2329
getRecordDiagFromTagKind
static unsigned getRecordDiagFromTagKind(TagTypeKind Tag)
Get diagnostic select index for tag kind for record diagnostic message.
Definition: SemaDeclCXX.cpp:1580
clang::DeclContext::getParent
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1752
checkTrivialClassMembers
static bool checkTrivialClassMembers(Sema &S, CXXRecordDecl *RD, Sema::CXXSpecialMember CSM, bool ConstArg, Sema::TrivialABIHandling TAH, bool Diagnose)
Check whether the members of a class type allow a special member to be trivial.
Definition: SemaDeclCXX.cpp:7525
clang::Sema::ConditionKind::Boolean
A boolean condition, from &#39;if&#39;, &#39;while&#39;, &#39;for&#39;, or &#39;do&#39;.
clang::Sema::SetDeclDeleted
void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc)
Definition: SemaDeclCXX.cpp:14579
specialMemberIsConstexpr
static bool specialMemberIsConstexpr(Sema &S, CXXRecordDecl *ClassDecl, Sema::CXXSpecialMember CSM, unsigned Quals, bool ConstRHS, CXXConstructorDecl *InheritedCtor=nullptr, Sema::InheritedConstructorInfo *Inherited=nullptr)
Is the special member function which would be selected to perform the specified operation on the spec...
Definition: SemaDeclCXX.cpp:6309
clang::ASTContext::getRecordType
QualType getRecordType(const RecordDecl *Decl) const
Definition: ASTContext.cpp:3903
clang::ActionResult::isInvalid
bool isInvalid() const
Definition: Ownership.h:170
clang::NUM_OVERLOADED_OPERATORS
Definition: OperatorKinds.h:27
clang::SourceRange::getEnd
SourceLocation getEnd() const
Definition: SourceLocation.h:208
clang::UnaryOperator
UnaryOperator - This represents the unary-expression&#39;s (except sizeof and alignof), the postinc/postdec operators from postfix-expression, and various extensions.
Definition: Expr.h:1896
clang::Sema::ImplicitExceptionSpecification::CalledDecl
void CalledDecl(SourceLocation CallLoc, const CXXMethodDecl *Method)
Integrate another called method into the collected data.
Definition: SemaDeclCXX.cpp:152
clang::CXXMemberCallExpr::getMethodDecl
CXXMethodDecl * getMethodDecl() const
Retrieves the declaration of the called method.
Definition: ExprCXX.cpp:652
clang::CXXRecordDecl::setHasTrivialSpecialMemberForCall
void setHasTrivialSpecialMemberForCall()
Definition: DeclCXX.h:1496
clang::ASTContext::getFunctionType
QualType getFunctionType(QualType ResultTy, ArrayRef< QualType > Args, const FunctionProtoType::ExtProtoInfo &EPI) const
Return a normal function type with a typed argument list.
Definition: ASTContext.h:1380
clang::Sema::RequireLiteralType
bool RequireLiteralType(SourceLocation Loc, QualType T, TypeDiagnoser &Diagnoser)
Ensure that the type T is a literal type.
Definition: SemaType.cpp:7953
clang::VectorType
Represents a GCC generic vector type.
Definition: Type.h:3168
clang::LValueReferenceType
An lvalue reference type, per C++11 [dcl.ref].
Definition: Type.h:2720
clang::DeclContext::isDependentContext
bool isDependentContext() const
Determines whether this context is dependent on a template parameter.
Definition: DeclBase.cpp:1078
clang::DeclSpec::isFriendSpecified
bool isFriendSpecified() const
Definition: DeclSpec.h:721
clang::Type::getBaseElementTypeUnsafe
const Type * getBaseElementTypeUnsafe() const
Get the base element type of this type, potentially discarding type qualifiers.
Definition: Type.h:6688
clang::Sema::SynthesizedFunctionScope::addContextNote
void addContextNote(SourceLocation UseLoc)
Definition: Sema.h:779
ASTConsumer.h
clang::CXXRecordDecl::hasTrivialCopyConstructor
bool hasTrivialCopyConstructor() const
Determine whether this class has a trivial copy constructor (C++ [class.copy]p6, C++11 [class...
Definition: DeclCXX.h:1400
clang::Sema::ActOnCXXEnterDeclInitializer
void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl)
ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an initializer for the declaration ...
Definition: SemaDeclCXX.cpp:14914
clang::CXXDestructorDecl::setOperatorDelete
void setOperatorDelete(FunctionDecl *OD, Expr *ThisArg)
Definition: DeclCXX.cpp:2477
clang::DeclRefExpr::getDecl
ValueDecl * getDecl()
Definition: Expr.h:1114
clang::CXXDeductionGuideDecl
Represents a C++ deduction guide declaration.
Definition: DeclCXX.h:1988
clang::CXXRecordDecl::needsImplicitDefaultConstructor
bool needsImplicitDefaultConstructor() const
Determine if we need to declare a default constructor for this class.
Definition: DeclCXX.h:974
clang::ActionResult::isUsable
bool isUsable() const
Definition: Ownership.h:171
clang::CXXConversionDecl
Represents a C++ conversion function within a class.
Definition: DeclCXX.h:2768
RecursiveASTVisitor.h
clang::ASTContext::getTypeDeclType
QualType getTypeDeclType(const TypeDecl *Decl, const TypeDecl *PrevDecl=nullptr) const
Return the unique reference to the type for the specified type declaration.
Definition: ASTContext.h:1396
clang::ObjCSubstitutionContext::Result
The result type of a method or function.
clang::TSK_ImplicitInstantiation
This template specialization was implicitly instantiated from a template.
Definition: Specifiers.h:152
clang::FunctionDecl::isTrivial
bool isTrivial() const
Whether this function is "trivial" in some specialized C++ senses.
Definition: Decl.h:2026
clang::Type::isUnionType
bool isUnionType() const
Definition: Type.cpp:475
clang::DependentNameTypeLoc::setQualifierLoc
void setQualifierLoc(NestedNameSpecifierLoc QualifierLoc)
Definition: TypeLoc.h:2011
PopulateKeysForFields
static void PopulateKeysForFields(FieldDecl *Field, SmallVectorImpl< const void *> &IdealInits)
Definition: SemaDeclCXX.cpp:4892
clang::QualType::isNull
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:703
clang::CXXRecordDecl::hasNonTrivialMoveAssignment
bool hasNonTrivialMoveAssignment() const
Determine whether this class has a non-trivial move assignment operator (C++11 [class.copy]p25)
Definition: DeclCXX.h:1470
clang::CXXRecordDecl::isProvablyNotDerivedFrom
bool isProvablyNotDerivedFrom(const CXXRecordDecl *Base) const
Determine whether this class is provably not derived from the type Base.
Definition: CXXInheritance.cpp:133
clang::Sema::DiagnoseNontrivial
void DiagnoseNontrivial(const CXXRecordDecl *Record, CXXSpecialMember CSM)
Diagnose why the specified class does not have a trivial special member of the given kind...
Definition: SemaDeclCXX.cpp:7576
clang::isTemplateInstantiation
bool isTemplateInstantiation(TemplateSpecializationKind Kind)
Determine whether this template specialization kind refers to an instantiation of an entity (as oppos...
Definition: Specifiers.h:170
clang::Sema::CheckOverridingFunctionAttributes
bool CheckOverridingFunctionAttributes(const CXXMethodDecl *New, const CXXMethodDecl *Old)
Definition: SemaDeclCXX.cpp:14714
clang::Sema::TAH_ConsiderTrivialABI
The triviality of a method affected by "trivial_abi".
Definition: Sema.h:2294
CheckConstexprFunctionStmt
static bool CheckConstexprFunctionStmt(Sema &SemaRef, const FunctionDecl *Dcl, Stmt *S, SmallVectorImpl< SourceLocation > &ReturnStmts, SourceLocation &Cxx1yLoc, SourceLocation &Cxx2aLoc)
Check the provided statement is allowed in a constexpr function definition.
Definition: SemaDeclCXX.cpp:1808
clang::Sema::DefineImplicitDefaultConstructor
void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, CXXConstructorDecl *Constructor)
DefineImplicitDefaultConstructor - Checks for feasibility of defining this constructor as the default...
Definition: SemaDeclCXX.cpp:10995
clang::CallingConv
CallingConv
CallingConv - Specifies the calling convention that a function uses.
Definition: Specifiers.h:236
clang::FunctionTypeLoc::getReturnLoc
TypeLoc getReturnLoc() const
Definition: TypeLoc.h:1411
RefersToRValueRef
static bool RefersToRValueRef(Expr *MemRef)
Definition: SemaDeclCXX.cpp:4356
clang::ComparisonCategoryInfo::ValueInfo::hasValidIntValue
bool hasValidIntValue() const
True iff we&#39;ve successfully evaluated the variable as a constant expression and extracted its integer...
Definition: ComparisonCategories.cpp:23
clang::Decl::getFriendObjectKind
FriendObjectKind getFriendObjectKind() const
Determines whether this declaration is the object of a friend declaration and, if so...
Definition: DeclBase.h:1104
clang::Stmt::getEndLoc
SourceLocation getEndLoc() const LLVM_READONLY
Definition: Stmt.cpp:301
clang::QualType::getCVRQualifiers
unsigned getCVRQualifiers() const
Retrieve the set of CVR (const-volatile-restrict) qualifiers applied to this type.
Definition: Type.h:6105
clang::InitializationKind::CreateCopy
static InitializationKind CreateCopy(SourceLocation InitLoc, SourceLocation EqualLoc, bool AllowExplicitConvs=false)
Create a copy initialization.
Definition: Initialization.h:647
clang::Sema::CheckConstexprFunctionBody
bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body)
Check the body for the given constexpr function declaration only contains the permitted types of stat...
Definition: SemaDeclCXX.cpp:1946
CheckPolymorphic
#define CheckPolymorphic(Type)
Definition: SemaDeclCXX.cpp:5424
clang::Type::getCanonicalTypeUnqualified
CanQualType getCanonicalTypeUnqualified() const
Definition: CanonicalType.h:215
clang::DeclaratorChunk::FunctionTypeInfo::getRefQualifierLoc
SourceLocation getRefQualifierLoc() const
Retrieve the location of the ref-qualifier, if any.
Definition: DeclSpec.h:1416
clang::QualType::isConstQualified
bool isConstQualified() const
Determine whether this type is const-qualified.
Definition: Type.h:6131
clang::TST_decltype_auto
Definition: Specifiers.h:77
clang::Declarator::hasGroupingParens
bool hasGroupingParens() const
Definition: DeclSpec.h:2448
clang::DeclaratorChunk::Pointer
Definition: DeclSpec.h:1150
clang::FunctionDecl::TK_NonTemplate
Definition: Decl.h:1746
clang::Sema::HideUsingShadowDecl
void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow)
Hides a using shadow declaration.
Definition: SemaDeclCXX.cpp:9795
clang::FunctionProtoType::hasTrailingReturn
bool hasTrailingReturn() const
Whether this function prototype has a trailing return type.
Definition: Type.h:4013
clang::RecordType::getDecl
RecordDecl * getDecl() const
Definition: Type.h:4380
clang::CXXRecordDecl::hasVariantMembers
bool hasVariantMembers() const
Determine whether this class has any variant members.
Definition: DeclCXX.h:1359
clang::EST_NoexceptFalse
noexcept(expression), evals to &#39;false&#39;
Definition: ExceptionSpecificationType.h:28
clang::CXXScopeSpec::getScopeRep
NestedNameSpecifier * getScopeRep() const
Retrieve the representation of the nested-name-specifier.
Definition: DeclSpec.h:76
clang::AS_protected
Definition: Specifiers.h:100
clang::RecordDecl::isInjectedClassName
bool isInjectedClassName() const
Determines whether this declaration represents the injected class name.
Definition: Decl.cpp:4126
clang::CXXMethodDecl::size_overridden_methods
unsigned size_overridden_methods() const
Definition: DeclCXX.cpp:2164
SearchForReturnInStmt
static void SearchForReturnInStmt(Sema &Self, Stmt *S)
Definition: SemaDeclCXX.cpp:14695
clang::DeclSpec::TQ_atomic
Definition: DeclSpec.h:321
clang::ArrayTypeLoc
Wrapper for source info for arrays.
Definition: TypeLoc.h:1460
clang::isComputedNoexcept
bool isComputedNoexcept(ExceptionSpecificationType ESpecType)
Definition: ExceptionSpecificationType.h:39
DiagnoseUnexpandedParameterPacks
static bool DiagnoseUnexpandedParameterPacks(Sema &S, TemplateTemplateParmDecl *TTP)
Check for unexpanded parameter packs within the template parameters of a template template parameter...
Definition: SemaTemplate.cpp:2108
clang::Sema::checkClassLevelCodeSegAttribute
void checkClassLevelCodeSegAttribute(CXXRecordDecl *Class)
Definition: SemaDeclCXX.cpp:5626
clang::Sema::BuildCXXConstructExpr
ExprResult BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, NamedDecl *FoundDecl, CXXConstructorDecl *Constructor, MultiExprArg Exprs, bool HadMultipleCandidates, bool IsListInitialization, bool IsStdInitListInitialization, bool RequiresZeroInit, unsigned ConstructKind, SourceRange ParenRange)
BuildCXXConstructExpr - Creates a complete call to a constructor, including handling of its default a...
Definition: SemaDeclCXX.cpp:12890
clang::LangAS::opencl_generic
clang::NestedNameSpecifier::containsUnexpandedParameterPack
bool containsUnexpandedParameterPack() const
Whether this nested-name-specifier contains an unexpanded parameter pack (for C++11 variadic template...
Definition: NestedNameSpecifier.cpp:253
clang::DeclContext::getDeclKind
Decl::Kind getDeclKind() const
Definition: DeclBase.h:1745
clang::Sema::ActOnStartCXXInClassMemberInitializer
void ActOnStartCXXInClassMemberInitializer()
Enter a new C++ default initializer scope.
Definition: SemaDeclCXX.cpp:3636
CheckOperatorNewDeleteDeclarationScope
static bool CheckOperatorNewDeleteDeclarationScope(Sema &SemaRef, const FunctionDecl *FnDecl)
Definition: SemaDeclCXX.cpp:13132
clang::UnqualifiedId::Kind
UnqualifiedIdKind Kind
Describes the kind of unqualified-id parsed.
Definition: DeclSpec.h:941
clang::OpaqueValueExpr
OpaqueValueExpr - An expression referring to an opaque object of a fixed type and value class...
Definition: Expr.h:945
clang::ASTContext::NumImplicitDestructorsDeclared
static unsigned NumImplicitDestructorsDeclared
The number of implicitly-declared destructors for which declarations were built.
Definition: ASTContext.h:2827
clang::DeclContext::makeDeclVisibleInContext
void makeDeclVisibleInContext(NamedDecl *D)
Makes a declaration visible within this context.
Definition: DeclBase.cpp:1785
clang::Sema::pushCodeSynthesisContext
void pushCodeSynthesisContext(CodeSynthesisContext Ctx)
Definition: SemaTemplateInstantiate.cpp:357
clang::Qualifiers::Const
Definition: Type.h:144
clang::Sema::CodeSynthesisContext::DeclaringSpecialMember
We are declaring an implicit special member function.
Definition: Sema.h:7218
clang::Sema::CodeSynthesisContext::SpecialMember
CXXSpecialMember SpecialMember
The special member being declared or defined.
Definition: Sema.h:7256
clang::ASTContext::BuiltinFnTy
CanQualType BuiltinFnTy
Definition: ASTContext.h:1046
clang::TTK_Struct
The "struct" keyword.
Definition: Type.h:5033
Kind
Kind
Definition: ChrootChecker.cpp:29
findUserDeclaredCtor
static CXXConstructorDecl * findUserDeclaredCtor(CXXRecordDecl *RD)
Definition: SemaDeclCXX.cpp:7446
clang::CXXInheritedCtorInitExpr
Represents a call to an inherited base class constructor from an inheriting constructor.
Definition: ExprCXX.h:1448
clang::ActionResult
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:157
clang::FunctionProtoType::ExceptionSpecInfo::Type
ExceptionSpecificationType Type
The kind of exception specification this is.
Definition: Type.h:3743
clang::PseudoObjectExpr
PseudoObjectExpr - An expression which accesses a pseudo-object l-value.
Definition: Expr.h:5299
clang::ASTContext::getElaboratedType
QualType getElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, QualType NamedType, TagDecl *OwnedTagDecl=nullptr) const
Definition: ASTContext.cpp:4169
clang::TypeLoc::IgnoreParens
TypeLoc IgnoreParens() const
Definition: TypeLoc.h:1127
clang::ParmVarDecl::getSourceRange
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
Definition: Decl.cpp:2558
clang::Redeclarable::getPreviousDecl
decl_type * getPreviousDecl()
Return the previous declaration of this declaration or NULL if this is the first declaration.
Definition: Redeclarable.h:204
clang::FunctionProtoType::getExtParameterInfo
ExtParameterInfo getExtParameterInfo(unsigned I) const
Definition: Type.h:4078
clang::FunctionProtoType::getExtProtoInfo
ExtProtoInfo getExtProtoInfo() const
Definition: Type.h:3899
clang::Decl::getAsFunction
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:218
clang::DeclSpec::getStorageClassSpec
SCS getStorageClassSpec() const
Definition: DeclSpec.h:451
clang::Sema::getASTContext
ASTContext & getASTContext() const
Definition: Sema.h:1238
clang::CXXCtorInitializer::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
Determine the source range covering the entire initializer.
Definition: DeclCXX.cpp:2286
clang::FriendDecl::Create
static FriendDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation L, FriendUnion Friend_, SourceLocation FriendL, ArrayRef< TemplateParameterList *> FriendTypeTPLists=None)
Definition: DeclFriend.cpp:35
clang::Redeclarable::redecls
redecl_range redecls() const
Returns an iterator range for all the redeclarations of the same decl.
Definition: Redeclarable.h:295
clang::LinkageSpecDecl::lang_cxx
Definition: DeclCXX.h:2839
clang::Sema::AbstractArrayType
Definition: Sema.h:6121
IndirectBaseSet
llvm::SmallPtrSet< QualType, 4 > IndirectBaseSet
Use small set to collect indirect bases.
Definition: SemaDeclCXX.cpp:2379
clang::CXXRecordDecl::hasTrivialCopyAssignment
bool hasTrivialCopyAssignment() const
Determine whether this class has a trivial copy assignment operator (C++ [class.copy]p11, C++11 [class.copy]p25)
Definition: DeclCXX.h:1450
clang::ParsedAttributesView::const_iterator
Definition: ParsedAttr.h:791
clang::SourceLocation
Encodes a location in the source.
Definition: SourceLocation.h:88
clang::Sema::ActOnFinishDelayedMemberDeclarations
void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record)
Definition: SemaDeclCXX.cpp:8068
clang::CompoundStmt::body
body_range body()
Definition: Stmt.h:1274
clang::FunctionType::getReturnType
QualType getReturnType() const
Definition: Type.h:3613
clang::DeclarationName::CXXConstructorName
Definition: DeclarationName.h:207
clang::IdentifierTable::get
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
Definition: IdentifierTable.h:519
clang::Sema::CodeSynthesisContext::ExceptionSpecEvaluation
We are computing the exception specification for a defaulted special member function.
Definition: Sema.h:7211
clang::DeclSpec::SCS_extern
Definition: DeclSpec.h:235
clang::EnumType
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of enums...
Definition: Type.h:4396
clang::DeclarationName::Identifier
Definition: DeclarationName.h:204
clang::Sema::CheckPureMethod
bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange)
Mark the given method pure.
Definition: SemaDeclCXX.cpp:14873
clang::ASTContext::hasSameTemplateName
bool hasSameTemplateName(TemplateName X, TemplateName Y)
Determine whether the given template names refer to the same template.
Definition: ASTContext.cpp:5296
clang::Sema::ActOnFinishLinkageSpecification
Decl * ActOnFinishLinkageSpecification(Scope *S, Decl *LinkageSpec, SourceLocation RBraceLoc)
ActOnFinishLinkageSpecification - Complete the definition of the C++ linkage specification LinkageSpe...
Definition: SemaDeclCXX.cpp:13683
clang::CXXTryStmt::getNumHandlers
unsigned getNumHandlers() const
Definition: StmtCXX.h:103
clang::DeclContext::decls_begin
decl_iterator decls_begin() const
Definition: DeclBase.cpp:1371
clang::UnaryOperator::getSubExpr
Expr * getSubExpr() const
Definition: Expr.h:1926
clang::DiagnosticErrorTrap::hasErrorOccurred
bool hasErrorOccurred() const
Determine whether any errors have occurred since this object instance was created.
Definition: Diagnostic.h:1010
clang::Sema::BuildStaticAssertDeclaration
Decl * BuildStaticAssertDeclaration(SourceLocation StaticAssertLoc, Expr *AssertExpr, StringLiteral *AssertMessageExpr, SourceLocation RParenLoc, bool Failed)
Definition: SemaDeclCXX.cpp:13901
clang::Type::isVariablyModifiedType
bool isVariablyModifiedType() const
Whether this type is a variably-modified type (C99 6.7.5).
Definition: Type.h:2095
clang::FunctionType::ExtParameterInfo::isNoEscape
bool isNoEscape() const
Definition: Type.h:3420
clang::CXXRecordDecl::setTrivialForCallFlags
void setTrivialForCallFlags(CXXMethodDecl *MD)
Definition: DeclCXX.cpp:1321
clang::Attr::clone
Attr * clone(ASTContext &C) const
clang::Declarator::getName
UnqualifiedId & getName()
Retrieve the name specified by this declarator.
Definition: DeclSpec.h:1873
clang::CastExpr::getCastKind
CastKind getCastKind() const
Definition: Expr.h:3044
CheckConstexprCtorInitializer
static void CheckConstexprCtorInitializer(Sema &SemaRef, const FunctionDecl *Dcl, FieldDecl *Field, llvm::SmallSet< Decl *, 16 > &Inits, bool &Diagnosed)
Check that the given field is initialized within a constexpr constructor.
Definition: SemaDeclCXX.cpp:1769
clang::FieldDecl::isUnnamedBitfield
bool isUnnamedBitfield() const
Determines whether this is an unnamed bitfield.
Definition: Decl.h:2660
clang::ASTContext::NumImplicitCopyAssignmentOperatorsDeclared
static unsigned NumImplicitCopyAssignmentOperatorsDeclared
The number of implicitly-declared copy assignment operators for which declarations were built...
Definition: ASTContext.h:2813
clang::Sema::checkThisInStaticMemberFunctionAttributes
bool checkThisInStaticMemberFunctionAttributes(CXXMethodDecl *Method)
Check whether &#39;this&#39; shows up in the attributes of the given static member function.
Definition: SemaDeclCXX.cpp:15414
clang::DeclarationNameInfo::getName
DeclarationName getName() const
getName - Returns the embedded declaration name.
Definition: DeclarationName.h:714
clang::ConstantExpr::Create
static ConstantExpr * Create(const ASTContext &Context, Expr *E)
Definition: Expr.h:909
clang::TagDecl
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3064
clang::UsingDecl::getUsingLoc
SourceLocation getUsingLoc() const
Return the source location of the &#39;using&#39; keyword.
Definition: DeclCXX.h:3385
clang::Sema::referenceDLLExportedClassMethods
void referenceDLLExportedClassMethods()
Definition: SemaDeclCXX.cpp:11334
clang::MultiExprArg
MutableArrayRef< Expr * > MultiExprArg
Definition: Ownership.h:277
clang::Sema::SpecialMemberOverloadResult::getKind
Kind getKind() const
Definition: Sema.h:1082
clang::ASTContext::CreateTypeSourceInfo
TypeSourceInfo * CreateTypeSourceInfo(QualType T, unsigned Size=0) const
Allocate an uninitialized TypeSourceInfo.
Definition: ASTContext.cpp:2586
clang::CXXMemberCallExpr
Represents a call to a member function that may be written either with member call syntax (e...
Definition: ExprCXX.h:171
clang::Decl::getASTContext
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:376
clang::DeclaratorChunk::Fun
FunctionTypeInfo Fun
Definition: DeclSpec.h:1520
clang::DeclSpec::isModulePrivateSpecified
bool isModulePrivateSpecified() const
Definition: DeclSpec.h:724
clang::Sema::InheritedConstructorInfo::InheritedConstructorInfo
InheritedConstructorInfo(Sema &S, SourceLocation UseLoc, ConstructorUsingShadowDecl *Shadow)
Definition: SemaDeclCXX.cpp:6236
clang::LangOptions::ClangABI::Ver4
Attempt to be ABI-compatible with code generated by Clang 4.0.x (SVN r291814).
CheckOperatorNewDeleteTypes
static bool CheckOperatorNewDeleteTypes(Sema &SemaRef, const FunctionDecl *FnDecl, CanQualType ExpectedResultType, CanQualType ExpectedFirstParamType, unsigned DependentParamTypeDiag, unsigned InvalidParamTypeDiag)
Definition: SemaDeclCXX.cpp:13159
clang::IfStmt::getElse
Stmt * getElse()
Definition: Stmt.h:1783
clang::VectorType::getElementType
QualType getElementType() const
Definition: Type.h:3203
clang::getDLLAttr
InheritableAttr * getDLLAttr(Decl *D)
Return a DLL attribute from the declaration.
Definition: SemaInternal.h:94
clang::DeclStmt
DeclStmt - Adaptor class for mixing declarations with statements and expressions. ...
Definition: Stmt.h:1143
clang::Decl::setReferenced
void setReferenced(bool R=true)
Definition: DeclBase.h:577
clang::Attr::getSpellingListIndex
unsigned getSpellingListIndex() const
Definition: Attr.h:91
clang::Preprocessor::getIdentifierTable
IdentifierTable & getIdentifierTable()
Definition: Preprocessor.h:823
clang::ParsedAttr
ParsedAttr - Represents a syntactic attribute.
Definition: ParsedAttr.h:117
clang::DeclSpec::SetStorageClassSpec
bool SetStorageClassSpec(Sema &S, SCS SC, SourceLocation Loc, const char *&PrevSpec, unsigned &DiagID, const PrintingPolicy &Policy)
These methods set the specified attribute of the DeclSpec and return false if there was no error...
Definition: DeclSpec.cpp:580
clang::Sema::DefineImplicitDestructor
void DefineImplicitDestructor(SourceLocation CurrentLocation, CXXDestructorDecl *Destructor)
DefineImplicitDestructor - Checks for feasibility of defining this destructor as the default destruct...
Definition: SemaDeclCXX.cpp:11273
clang::UnresolvedUsingValueDecl
Represents a dependent using declaration which was not marked with typename.
Definition: DeclCXX.h:3571
clang::TagDecl::getCanonicalDecl
TagDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.cpp:3866
clang::FieldDecl::getInClassInitializer
Expr * getInClassInitializer() const
Get the C++11 default member initializer for this member, or null if one has not been set...
Definition: Decl.h:2721
clang::DeclaratorChunk::Function
Definition: DeclSpec.h:1150
clang::QualType::getLocalCVRQualifiers
unsigned getLocalCVRQualifiers() const
Retrieve the set of CVR (const-volatile-restrict) qualifiers local to this particular QualType instan...
Definition: Type.h:765
clang::Sema::AbstractNone
Definition: Sema.h:6114
clang::Declarator::getDecompositionDeclarator
const DecompositionDeclarator & getDecompositionDeclarator() const
Definition: DeclSpec.h:1875
clang::UsingDecl::removeShadowDecl
void removeShadowDecl(UsingShadowDecl *S)
Definition: DeclCXX.cpp:2721
clang::CXXConstructorDecl::setCtorInitializers
void setCtorInitializers(CXXCtorInitializer **Initializers)
Definition: DeclCXX.h:2584
clang::ASTContext::getBaseElementType
QualType getBaseElementType(const ArrayType *VAT) const
Return the innermost element type of an array type.
Definition: ASTContext.cpp:5519
clang::CXXMethodDecl
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2041
clang::AS_public
Definition: Specifiers.h:99
clang::FunctionDecl::setDefaulted
void setDefaulted(bool D=true)
Definition: Decl.h:2035
Initialization.h
clang::ASTContext::getAsConstantArrayType
const ConstantArrayType * getAsConstantArrayType(QualType T) const
Definition: ASTContext.h:2413
clang::FunctionProtoType::hasExceptionSpec
bool hasExceptionSpec() const
Return whether this function has any kind of exception spec.
Definition: Type.h:3928
clang::CXXBasePaths::begin
paths_iterator begin()
Definition: CXXInheritance.h:192
clang::StmtVisitor
StmtVisitor - This class implements a simple visitor for Stmt subclasses.
Definition: StmtVisitor.h:183
clang::Sema::SetDeclDefaulted
void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc)
Definition: SemaDeclCXX.cpp:14647
clang::DeclSpec::SCS_typedef
Definition: DeclSpec.h:234
clang::EST_Uninstantiated
not instantiated yet
Definition: ExceptionSpecificationType.h:31
clang::VarDecl::hasGlobalStorage
bool hasGlobalStorage() const
Returns true for all variables that do not have local storage.
Definition: Decl.h:1078
clang::Sema::DefaultLvalueConversion
ExprResult DefaultLvalueConversion(Expr *E)
Definition: SemaExpr.cpp:553
clang::NestedNameSpecifier
Represents a C++ nested name specifier, such as "\::std::vector<int>::".
Definition: NestedNameSpecifier.h:49
clang::RQ_None
No ref-qualifier was provided.
Definition: Type.h:1360
clang::Scope::setEntity
void setEntity(DeclContext *E)
Definition: Scope.h:326
clang::Sema::CheckIfOverriddenFunctionIsMarkedFinal
bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, const CXXMethodDecl *Old)
CheckForFunctionMarkedFinal - Checks whether a virtual member function overrides a virtual member fun...
Definition: SemaDeclCXX.cpp:2841
clang::Sema::RecordDeclSetTy
llvm::SmallPtrSet< const CXXRecordDecl *, 8 > RecordDeclSetTy
Definition: Sema.h:584
clang::FunctionDecl::getParamDecl
const ParmVarDecl * getParamDecl(unsigned i) const
Definition: Decl.h:2285
clang::Sema::getAmbiguousPathsDisplayString
std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths)
Builds a string representing ambiguous paths from a specific derived class to different subobjects of...
Definition: SemaDeclCXX.cpp:2710
clang::CXXRecordDecl::setImplicitMoveConstructorIsDeleted
void setImplicitMoveConstructorIsDeleted()
Set that we attempted to declare an implicit move constructor, but overload resolution failed so we d...
Definition: DeclCXX.h:1070
clang::Attr::getLocation
SourceLocation getLocation() const
Definition: Attr.h:94
clang::TagDecl::getSourceRange
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
Definition: Decl.cpp:3860
clang::LookupResult::FoundUnresolvedValue
Name lookup found an unresolvable value declaration and cannot yet complete.
Definition: Lookup.h:69
clang::CanQual< Type >
clang::FunctionProtoType::getNoexceptExpr
Expr * getNoexceptExpr() const
Return the expression inside noexcept(expression), or a null pointer if there is none (because the ex...
Definition: Type.h:3963
findDirectBaseWithType
static CXXBaseSpecifier * findDirectBaseWithType(CXXRecordDecl *Derived, QualType DesiredBase, bool &AnyDependentBases)
Find the base specifier for a base class with the given type.
Definition: SemaDeclCXX.cpp:9817
clang::ASTContext::VoidTy
CanQualType VoidTy
Definition: ASTContext.h:1016
clang::Sema::actOnDelayedExceptionSpecification
void actOnDelayedExceptionSpecification(Decl *Method, ExceptionSpecificationType EST, SourceRange SpecificationRange, ArrayRef< ParsedType > DynamicExceptions, ArrayRef< SourceRange > DynamicExceptionRanges, Expr *NoexceptExpr)
Add an exception-specification to the given member function (or member function template).
Definition: SemaDeclCXX.cpp:15510
clang::CXXRecordDecl::isGenericLambda
bool isGenericLambda() const
Determine whether this class describes a generic lambda function object (i.e.
Definition: DeclCXX.cpp:1348
clang::InitializationKind
Describes the kind of initialization being performed, along with location information for tokens rela...
Definition: Initialization.h:540
clang::Expr::isValueDependent
bool isValueDependent() const
isValueDependent - Determines whether this expression is value-dependent (C++ [temp.dep.constexpr]).
Definition: Expr.h:149
TryNamespaceTypoCorrection
static bool TryNamespaceTypoCorrection(Sema &S, LookupResult &R, Scope *Sc, CXXScopeSpec &SS, SourceLocation IdentLoc, IdentifierInfo *Ident)
Definition: SemaDeclCXX.cpp:9331
clang::Sema::AbstractDiagSelID
AbstractDiagSelID
Definition: Sema.h:6113
clang::CallExpr::arguments
arg_range arguments()
Definition: Expr.h:2585
clang::DeclAccessPair::getAccess
AccessSpecifier getAccess() const
Definition: DeclAccessPair.h:45
llvm::SmallVector
Definition: LLVM.h:36
clang::Sema::BuildQualifiedType
QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs, const DeclSpec *DS=nullptr)
Definition: SemaType.cpp:1727
clang::Type::isObjCObjectPointerType
bool isObjCObjectPointerType() const
Definition: Type.h:6393
clang::LookupResult::Filter
A class for iterating through a result set and possibly filtering out results.
Definition: Lookup.h:606
clang::TemplateParameterList::size
unsigned size() const
Definition: DeclTemplate.h:124
clang::ICIS_ListInit
Direct list-initialization.
Definition: Specifiers.h:232
clang::VirtSpecifiers
Represents a C++11 virt-specifier-seq.
Definition: DeclSpec.h:2499
clang::ConstructorUsingShadowDecl::Create
static ConstructorUsingShadowDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation Loc, UsingDecl *Using, NamedDecl *Target, bool IsVirtual)
Definition: DeclCXX.cpp:2693
clang::ImplicitCastExpr
ImplicitCastExpr - Allows us to explicitly represent implicit type conversions, which have no direct ...
Definition: Expr.h:3115
clang::Type::isFunctionProtoType
bool isFunctionProtoType() const
Definition: Type.h:1947
clang::FunctionProtoTypeLoc
Definition: TypeLoc.h:1442
clang::Sema::CheckExplicitlyDefaultedMemberExceptionSpec
void CheckExplicitlyDefaultedMemberExceptionSpec(CXXMethodDecl *MD, const FunctionProtoType *T)
Check whether the exception specification provided for an explicitly-defaulted special member matches...
Definition: SemaDeclCXX.cpp:6706
checkSimpleDecomposition
static bool checkSimpleDecomposition(Sema &S, ArrayRef< BindingDecl *> Bindings, ValueDecl *Src, QualType DecompType, const llvm::APSInt &NumElems, QualType ElemType, llvm::function_ref< ExprResult(SourceLocation, Expr *, unsigned)> GetInit)
Definition: SemaDeclCXX.cpp:845
clang::CXXRecordDecl::setIsParsingBaseSpecifiers
void setIsParsingBaseSpecifiers()
Definition: DeclCXX.h:805
clang::ParmVarDecl::hasUninstantiatedDefaultArg
bool hasUninstantiatedDefaultArg() const
Definition: Decl.h:1664
clang::FriendTemplateDecl::Create
static FriendTemplateDecl * Create(ASTContext &Context, DeclContext *DC, SourceLocation Loc, MutableArrayRef< TemplateParameterList *> Params, FriendUnion Friend, SourceLocation FriendLoc)
Definition: DeclTemplate.cpp:890
clang::CXXBasePaths::getOrigin
CXXRecordDecl * getOrigin() const
Retrieve the type from which this base-paths search began.
Definition: CXXInheritance.h:229
BuildImplicitBaseInitializer
static bool BuildImplicitBaseInitializer(Sema &SemaRef, CXXConstructorDecl *Constructor, ImplicitInitializerKind ImplicitInitKind, CXXBaseSpecifier *BaseSpec, bool IsInheritedVirtualBase, CXXCtorInitializer *&CXXBaseInit)
Definition: SemaDeclCXX.cpp:4279
clang::LookupResult::NotFound
No entity found met the criteria.
Definition: Lookup.h:51
CheckOperatorDeleteDeclaration
static bool CheckOperatorDeleteDeclaration(Sema &SemaRef, FunctionDecl *FnDecl)
Definition: SemaDeclCXX.cpp:13252
clang::Sema::MarkVTableUsed
void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, bool DefinitionRequired=false)
Note that the vtable for the given class was used at the given location.
Definition: SemaDeclCXX.cpp:14995
clang::FunctionDecl::getMinRequiredArguments
unsigned getMinRequiredArguments() const
Returns the minimum number of arguments needed to call this function.
Definition: Decl.cpp:3076
clang::TSK_ExplicitInstantiationDefinition
This template specialization was instantiated from a template due to an explicit instantiation defini...
Definition: Specifiers.h:164
clang::TSK_Undeclared
This template specialization was formed from a template-id but has not yet been declared, defined, or instantiated.
Definition: Specifiers.h:149
clang::Sema::CheckUsingDeclRedeclaration
bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, bool HasTypenameKeyword, const CXXScopeSpec &SS, SourceLocation NameLoc, const LookupResult &Previous)
Checks that the given using declaration is not an invalid redeclaration.
Definition: SemaDeclCXX.cpp:10219
clang::Sema::BuildReferenceType
QualType BuildReferenceType(QualType T, bool LValueRef, SourceLocation Loc, DeclarationName Entity)
Build a reference type.
Definition: SemaType.cpp:1980
clang::TemplateParameterList::getRAngleLoc
SourceLocation getRAngleLoc() const
Definition: DeclTemplate.h:174
clang::FunctionDecl::isExplicitlyDefaulted
bool isExplicitlyDefaulted() const
Whether this function is explicitly defaulted per C++0x.
Definition: Decl.h:2039
memcpy
__DEVICE__ void * memcpy(void *__a, const void *__b, size_t __c)
Definition: __clang_cuda_device_functions.h:1612
clang::DeclSpec::getInlineSpecLoc
SourceLocation getInlineSpecLoc() const
Definition: DeclSpec.h:570
clang::LookupResult::Filter::next
NamedDecl * next()
Definition: Lookup.h:632
clang::FunctionDecl::setExplicitlyDefaulted
void setExplicitlyDefaulted(bool ED=true)
State that this function is explicitly defaulted per C++0x.
Definition: Decl.h:2045
clang::ParmVarDecl::setHasInheritedDefaultArg
void setHasInheritedDefaultArg(bool I=true)
Definition: Decl.h:1680
clang::RecordDecl::hasFlexibleArrayMember
bool hasFlexibleArrayMember() const
Definition: Decl.h:3647
clang::CXXRecordDecl::defaultedCopyConstructorIsDeleted
bool defaultedCopyConstructorIsDeleted() const
true if a defaulted copy constructor for this class would be deleted.
Definition: DeclCXX.h:912
clang::CXXScopeSpec::isInvalid
bool isInvalid() const
An error occurred during parsing of the scope specifier.
Definition: DeclSpec.h:194
checkTupleLikeDecomposition
static bool checkTupleLikeDecomposition(Sema &S, ArrayRef< BindingDecl *> Bindings, VarDecl *Src, QualType DecompType, const llvm::APSInt &TupleSize)
Definition: SemaDeclCXX.cpp:1092
computeImplicitExceptionSpec
static Sema::ImplicitExceptionSpecification computeImplicitExceptionSpec(Sema &S, SourceLocation Loc, CXXMethodDecl *MD)
Definition: SemaDeclCXX.cpp:6448
clang::EST_DynamicNone
throw()
Definition: ExceptionSpecificationType.h:23
clang::FunctionDecl::isTrivialForCall
bool isTrivialForCall() const
Definition: Decl.h:2029
clang::ASTContext::hasSameUnqualifiedType
bool hasSameUnqualifiedType(QualType T1, QualType T2) const
Determine whether the given types are equivalent after cvr-qualifiers have been removed.
Definition: ASTContext.h:2293
clang::TemplateArgumentListInfo::addArgument
void addArgument(const TemplateArgumentLoc &Loc)
Definition: TemplateBase.h:595
clang::Decl::isOutOfLine
virtual bool isOutOfLine() const
Determine whether this declaration is declared out of line (outside its semantic context).
Definition: Decl.cpp:99
clang::MultiVersionKind::None
clang::FunctionProtoType::getExceptionSpecType
ExceptionSpecificationType getExceptionSpecType() const
Get the kind of exception specification on this function.
Definition: Type.h:3922
clang::Expr::getExprLoc
SourceLocation getExprLoc() const LLVM_READONLY
getExprLoc - Return the preferred location for the arrow when diagnosing a problem with a generic exp...
Definition: Expr.cpp:215
clang::ASTContext::getArrayDecayedType
QualType getArrayDecayedType(QualType T) const
Return the properly qualified result of decaying the specified array type to a pointer.
Definition: ASTContext.cpp:5497
clang::ArrayTypeLoc::getElementLoc
TypeLoc getElementLoc() const
Definition: TypeLoc.h:1493
clang::CXXRecordDecl::hasInClassInitializer
bool hasInClassInitializer() const
Whether this class has any in-class initializers for non-static data members (including those in anon...
Definition: DeclCXX.h:1289
clang::Sema::getSpecialMember
CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD)
getSpecialMember - get the special member enum for a method.
Definition: SemaDecl.cpp:2807
clang::VirtSpecifiers::getLastLocation
SourceLocation getLastLocation() const
Definition: DeclSpec.h:2529
clang::Sema::DeclareImplicitDestructor
CXXDestructorDecl * DeclareImplicitDestructor(CXXRecordDecl *ClassDecl)
Declare the implicit destructor for the given class.
Definition: SemaDeclCXX.cpp:11212
clang::BinaryOperator::getLHS
Expr * getLHS() const
Definition: Expr.h:3327
clang::TypeAliasDecl::Create
static TypeAliasDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, TypeSourceInfo *TInfo)
Definition: Decl.cpp:4571
clang::DeclAccessPair
A POD class for pairing a NamedDecl* with an access specifier.
Definition: DeclAccessPair.h:30
clang::InheritedConstructor::getConstructor
CXXConstructorDecl * getConstructor() const
Definition: DeclCXX.h:2471
clang::IdentifierInfo::getName
StringRef getName() const
Return the actual identifier string.
Definition: IdentifierTable.h:156
clang::Sema::BuildDelegatingInitializer
MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, Expr *Init, CXXRecordDecl *ClassDecl)
Definition: SemaDeclCXX.cpp:4067
clang::Attr::getRange
SourceRange getRange() const
Definition: Attr.h:95
clang::Declarator::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
Get the source range that spans this declarator.
Definition: DeclSpec.h:1889
clang::DeclSpec::TQ
TQ
Definition: DeclSpec.h:313
checkForMultipleExportedDefaultConstructors
static void checkForMultipleExportedDefaultConstructors(Sema &S, CXXRecordDecl *Class)
Definition: SemaDeclCXX.cpp:5588
clang::Sema::ActOnExceptionDeclarator
Decl * ActOnExceptionDeclarator(Scope *S, Declarator &D)
ActOnExceptionDeclarator - Parsed the exception-declarator in a C++ catch handler.
Definition: SemaDeclCXX.cpp:13836
clang::Sema::diagnoseTypo
void diagnoseTypo(const TypoCorrection &Correction, const PartialDiagnostic &TypoDiag, bool ErrorRecovery=true)
Definition: SemaLookup.cpp:5014
clang::ASTContext::getDefaultCallingConvention
CallingConv getDefaultCallingConvention(bool IsVariadic, bool IsCXXMethod) const
Retrieves the default calling convention for the current target.
Definition: ASTContext.cpp:9933
clang::TypedefNameDecl
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:2916
clang::ComparisonCategories::lookupInfo
const ComparisonCategoryInfo * lookupInfo(ComparisonCategoryType Kind) const
Return the cached comparison category information for the specified &#39;Kind&#39;.
Definition: ComparisonCategories.cpp:92
Node
ast_type_traits::DynTypedNode Node
Definition: ASTMatchFinder.cpp:61
clang::ASTContext::CharTy
CanQualType CharTy
Definition: ASTContext.h:1018
clang::VarDecl::TLS_Dynamic
TLS with a dynamic initializer.
Definition: Decl.h:836
clang::TemplateArgument
Represents a template argument.
Definition: TemplateBase.h:51
clang::FunctionDecl::setBody
void setBody(Stmt *B)
Definition: Decl.cpp:2741
clang::TagTypeKind
TagTypeKind
The kind of a tag type.
Definition: Type.h:5031
isInvalid
static bool isInvalid(LocType Loc, bool *Invalid)
Definition: SourceManager.cpp:1166
clang::ObjCImplDecl::getClassInterface
const ObjCInterfaceDecl * getClassInterface() const
Definition: DeclObjC.h:2440
clang::CXXRecordDecl::hasNonTrivialCopyConstructorForCall
bool hasNonTrivialCopyConstructorForCall() const
Definition: DeclCXX.h:1415
clang::ParmVarDecl::Create
static ParmVarDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, SourceLocation IdLoc, IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, StorageClass S, Expr *DefArg)
Definition: Decl.cpp:2535
clang::LinkageSpecDecl::Create
static LinkageSpecDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation ExternLoc, SourceLocation LangLoc, LanguageIDs Lang, bool HasBraces)
Definition: DeclCXX.cpp:2528
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:22
clang::TypeAliasDecl::setDescribedAliasTemplate
void setDescribedAliasTemplate(TypeAliasTemplateDecl *TAT)
Definition: Decl.h:3056
clang::CXXConstructorDecl::isExplicit
bool isExplicit() const
Whether this function is explicit.
Definition: DeclCXX.h:2589
DelegatingCycleHelper
static void DelegatingCycleHelper(CXXConstructorDecl *Ctor, llvm::SmallPtrSet< CXXConstructorDecl *, 4 > &Valid, llvm::SmallPtrSet< CXXConstructorDecl *, 4 > &Invalid, llvm::SmallPtrSet< CXXConstructorDecl *, 4 > &Current, Sema &S)
Definition: SemaDeclCXX.cpp:15248
clang::SourceLocation::isValid
bool isValid() const
Return true if this is a valid SourceLocation object.
Definition: SourceLocation.h:108
clang::Sema::DeclareImplicitCopyConstructor
CXXConstructorDecl * DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl)
Declare the implicit copy constructor for the given class.
Definition: SemaDeclCXX.cpp:12497
clang::Sema::HandleMSProperty
MSPropertyDecl * HandleMSProperty(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, Declarator &D, Expr *BitfieldWidth, InClassInitStyle InitStyle, AccessSpecifier AS, const ParsedAttr &MSPropertyAttr)
HandleMSProperty - Analyze a __delcspec(property) field of a C++ class.
Definition: SemaDeclCXX.cpp:15549
clang::TemplateArgumentLoc::getArgument
const TemplateArgument & getArgument() const
Definition: TemplateBase.h:499
clang::EST_Unevaluated
not evaluated yet, for special member function
Definition: ExceptionSpecificationType.h:30
clang::DeclContext
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1262
clang::StructuralEquivalenceKind::Default
clang::TemplateDecl
The base class of all kinds of template declarations (e.g., class, function, etc.).
Definition: DeclTemplate.h:399
clang::OverloadedOperatorKind
OverloadedOperatorKind
Enumeration specifying the different kinds of C++ overloaded operators.
Definition: OperatorKinds.h:22
clang::DeclSpec::TST_auto
static const TST TST_auto
Definition: DeclSpec.h:303
clang::CXXMethodDecl::begin_overridden_methods
method_iterator begin_overridden_methods() const
Definition: DeclCXX.cpp:2154
clang::Scope::getParent
const Scope * getParent() const
getParent - Return the scope that this is nested in.
Definition: Scope.h:226
clang::Sema::ImpCastExprToType
ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, ExprValueKind VK=VK_RValue, const CXXCastPath *BasePath=nullptr, CheckedConversionKind CCK=CCK_ImplicitConversion)
ImpCastExprToType - If Expr is not of type &#39;Type&#39;, insert an implicit cast.
Definition: Sema.cpp:474
AddMostOverridenMethods
static void AddMostOverridenMethods(const CXXMethodDecl *MD, llvm::SmallPtrSetImpl< const CXXMethodDecl *> &Methods)
Add the most overriden methods from MD to Methods.
Definition: SemaDeclCXX.cpp:7794
clang::TypeLoc::getType
QualType getType() const
Get the type for which this source info wrapper provides information.
Definition: TypeLoc.h:131
clang::Sema::ActOnForStmt
StmtResult ActOnForStmt(SourceLocation ForLoc, SourceLocation LParenLoc, Stmt *First, ConditionResult Second, FullExprArg Third, SourceLocation RParenLoc, Stmt *Body)
Definition: SemaStmt.cpp:1728
clang::DeclaratorChunk::FunctionTypeInfo::isVariadic
unsigned isVariadic
isVariadic - If this function has a prototype, and if that proto ends with &#39;,...)&#39;, this is true.
Definition: DeclSpec.h:1258
clang::FunctionDecl::getTemplateSpecializationKind
TemplateSpecializationKind getTemplateSpecializationKind() const
Determine what kind of template instantiation this function represents.
Definition: Decl.cpp:3558
clang::CXXThisExpr::isImplicit
bool isImplicit() const
Definition: ExprCXX.h:997
clang::tooling::fixit::internal::getSourceRange
SourceRange getSourceRange(const SourceRange &Range)
Returns the SourceRange of a SourceRange.
Definition: FixIt.h:34
clang::DeclContext::isRecord
bool isRecord() const
Definition: DeclBase.h:1827
clang::Decl::attrs
attr_range attrs() const
Definition: DeclBase.h:490
clang::Sema::CXXMoveConstructor
Definition: Sema.h:1170
clang::TemplateIdAnnotation::RAngleLoc
SourceLocation RAngleLoc
The location of the &#39;>&#39; after the template argument list.
Definition: ParsedTemplate.h:182
InitializationHasSideEffects
static bool InitializationHasSideEffects(const FieldDecl &FD)
Definition: SemaDeclCXX.cpp:2854
clang::CXXRecordDecl::hasTrivialDestructorForCall
bool hasTrivialDestructorForCall() const
Definition: DeclCXX.h:1482
clang::IndirectFieldDecl
Represents a field injected from an anonymous union/struct into the parent scope. ...
Definition: Decl.h:2825
clang::Sema::ActOnParamDefaultArgument
void ActOnParamDefaultArgument(Decl *param, SourceLocation EqualLoc, Expr *defarg)
ActOnParamDefaultArgument - Check whether the default argument provided for a function parameter is w...
Definition: SemaDeclCXX.cpp:298
clang::CXXConstructorDecl::isCopyConstructor
bool isCopyConstructor(unsigned &TypeQuals) const
Whether this constructor is a copy constructor (C++ [class.copy]p2, which can be used to copy the cla...
Definition: DeclCXX.cpp:2365
clang::CXXCtorInitializer::getSourceLocation
SourceLocation getSourceLocation() const
Determine the source location of the initializer.
Definition: DeclCXX.cpp:2273
clang::TypedefNameDecl::getUnderlyingType
QualType getUnderlyingType() const
Definition: Decl.h:2971
clang::ASTContext::UnsignedLongLongTy
CanQualType UnsignedLongLongTy
Definition: ASTContext.h:1027
clang::NestedNameSpecifier::isDependent
bool isDependent() const
Whether this nested name specifier refers to a dependent type or not.
Definition: NestedNameSpecifier.cpp:203
clang::FixItHint::CreateRemoval
static FixItHint CreateRemoval(CharSourceRange RemoveRange)
Create a code modification hint that removes the given source range.
Definition: Diagnostic.h:118
clang::Decl::getAccess
AccessSpecifier getAccess() const
Definition: DeclBase.h:462
clang::VarDecl::getInit
const Expr * getInit() const
Definition: Decl.h:1220
clang::DecompositionDecl
A decomposition declaration.
Definition: DeclCXX.h:3843
clang::OverridingMethods::iterator
MapType::iterator iterator
Definition: CXXInheritance.h:289
clang::DeclContext::getOuterLexicalRecordContext
RecordDecl * getOuterLexicalRecordContext()
Retrieve the outermost lexically enclosing record context.
Definition: DeclBase.cpp:1756
clang::TSK_ExplicitInstantiationDeclaration
This template specialization was instantiated from a template due to an explicit instantiation declar...
Definition: Specifiers.h:160
getNamespaceDecl
static NamespaceDecl * getNamespaceDecl(NamedDecl *D)
getNamespaceDecl - Returns the namespace a decl represents.
Definition: SemaDeclCXX.cpp:8986
clang::CXXRecordDecl::hasUserDeclaredConstructor
bool hasUserDeclaredConstructor() const
Determine whether this class has any user-declared constructors.
Definition: DeclCXX.h:983
clang::TemplateTypeParmDecl::getIndex
unsigned getIndex() const
Retrieve the index of the template parameter.
Definition: DeclTemplate.cpp:522
clang::Sema::CheckCompleteDecompositionDeclaration
void CheckCompleteDecompositionDeclaration(DecompositionDecl *DD)
Definition: SemaDeclCXX.cpp:1390
clang::UnresolvedUsingTypenameDecl
Represents a dependent using declaration which was marked with typename.
Definition: DeclCXX.h:3667
clang::FunctionDecl::getTemplateInstantiationPattern
FunctionDecl * getTemplateInstantiationPattern() const
Retrieve the function declaration from which this function could be instantiated, if it is an instant...
Definition: Decl.cpp:3414
clang::UsingDirectiveDecl::Create
static UsingDirectiveDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc, SourceLocation NamespaceLoc, NestedNameSpecifierLoc QualifierLoc, SourceLocation IdentLoc, NamedDecl *Nominated, DeclContext *CommonAncestor)
Definition: DeclCXX.cpp:2545
clang::TargetCXXABI::areArgsDestroyedLeftToRightInCallee
bool areArgsDestroyedLeftToRightInCallee() const
Are arguments to a call destroyed left to right in the callee? This is a fundamental language change...
Definition: TargetCXXABI.h:209
clang::FunctionDecl::setWillHaveBody
void setWillHaveBody(bool V=true)
Definition: Decl.h:2222
clang::TypoCorrection::getCorrectionDecl
NamedDecl * getCorrectionDecl() const
Gets the pointer to the declaration of the typo correction.
Definition: TypoCorrection.h:152
clang::DeclarationName
The name of a declaration.
Definition: DeclarationName.h:146
clang::Stmt::getStmtClass
StmtClass getStmtClass() const
Definition: Stmt.h:1029
clang::FunctionProtoType::exceptions
ArrayRef< QualType > exceptions() const
Definition: Type.h:4044
clang::ParsedAttributesView
Definition: ParsedAttr.h:760
clang::LookupResult::getFoundDecl
NamedDecl * getFoundDecl() const
Fetch the unique decl found by this lookup.
Definition: Lookup.h:506
clang::DeclGroupRef
Definition: DeclGroup.h:52
clang::ParmVarDecl::getDefaultArg
Expr * getDefaultArg()
Definition: Decl.cpp:2573
clang::NamedDecl::isCXXClassMember
bool isCXXClassMember() const
Determine whether this declaration is a C++ class member.
Definition: Decl.h:346
clang::CXXMethodDecl::getParent
const CXXRecordDecl * getParent() const
Returns the parent of this method declaration, which is the class in which this method is defined...
Definition: DeclCXX.h:2166
clang::CXXConstructorDecl::isMoveConstructor
bool isMoveConstructor(unsigned &TypeQuals) const
Determine whether this constructor is a move constructor (C++11 [class.copy]p3), which can be used to...
Definition: DeclCXX.cpp:2370
clang::Sema::SpecialMembersBeingDeclared
llvm::SmallPtrSet< SpecialMemberDecl, 4 > SpecialMembersBeingDeclared
The C++ special members which we are currently in the process of declaring.
Definition: Sema.h:1183
clang::CXXCtorInitializer::getBaseClass
const Type * getBaseClass() const
If this is a base class initializer, returns the type of the base class.
Definition: DeclCXX.cpp:2266
clang::Sema::VTableUse
std::pair< CXXRecordDecl *, SourceLocation > VTableUse
The list of classes whose vtables have been used within this translation unit, and the source locatio...
Definition: Sema.h:5844
clang::frontend::CPlusPlus11
Definition: LangStandard.h:27
clang::CXXFinalOverriderMap
A mapping from each virtual member function to its set of final overriders.
Definition: CXXInheritance.h:369
clang::Qualifiers::Volatile
Definition: Type.h:146
clang::DeclaratorDecl::getNumTemplateParameterLists
unsigned getNumTemplateParameterLists() const
Definition: Decl.h:760
clang::EnumDecl
Represents an enum.
Definition: Decl.h:3326
clang::ComparisonCategoryInfo::Record
CXXRecordDecl * Record
The declaration for the comparison category type from the standard library.
Definition: ComparisonCategories.h:112
clang::CXXBasePaths::isAmbiguous
bool isAmbiguous(CanQualType BaseType)
Determine whether the path from the most-derived type to the given base type is ambiguous (i...
Definition: CXXInheritance.cpp:64
clang::MemberPointerType
A pointer to member type per C++ 8.3.3 - Pointers to members.
Definition: Type.h:2756
clang::Sema::CheckOverloadedOperatorDeclaration
bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl)
CheckOverloadedOperatorDeclaration - Check whether the declaration of this overloaded operator is wel...
Definition: SemaDeclCXX.cpp:13296
clang::TemplateSpecializationKind
TemplateSpecializationKind
Describes the kind of template specialization that a particular template specialization declaration r...
Definition: Specifiers.h:146
clang::PseudoObjectExpr::semantics_begin
semantics_iterator semantics_begin()
Definition: Expr.h:5367
clang::DeclarationName::CXXDestructorName
Definition: DeclarationName.h:208
clang::FunctionDecl::isDestroyingOperatorDelete
bool isDestroyingOperatorDelete() const
Determine whether this is a destroying operator delete.
Definition: Decl.cpp:2884
clang::Sema::FullExprArg::get
Expr * get() const
Definition: Sema.h:3673
clang::CXXMethodDecl::isUserProvided
bool isUserProvided() const
True if this method is user-declared and was not deleted or defaulted on its first declaration...
Definition: DeclCXX.h:2144
clang::DeclarationName::CXXConversionFunctionName
Definition: DeclarationName.h:209
clang::TemplateArgumentListInfo::arguments
llvm::ArrayRef< TemplateArgumentLoc > arguments() const
Definition: TemplateBase.h:583
clang::DeclarationNameInfo
DeclarationNameInfo - A collector data type for bundling together a DeclarationName and the correspnd...
Definition: DeclarationName.h:691
clang::Sema::BuildBaseInitializer
MemInitResult BuildBaseInitializer(QualType BaseType, TypeSourceInfo *BaseTInfo, Expr *Init, CXXRecordDecl *ClassDecl, SourceLocation EllipsisLoc)
Definition: SemaDeclCXX.cpp:4124
clang::ASTContext::getExternalSource
ExternalASTSource * getExternalSource() const
Retrieve a pointer to the external AST source associated with this AST context, if any...
Definition: ASTContext.h:1083
clang::DeclSpec::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclSpec.h:508
clang::DeclContext::specific_decl_iterator
specific_decl_iterator - Iterates over a subrange of declarations stored in a DeclContext, providing only those that are of type SpecificDecl (or a class derived from it).
Definition: DeclBase.h:2017
clang::Type::isUndeducedType
bool isUndeducedType() const
Determine whether this type is an undeduced type, meaning that it somehow involves a C++11 &#39;auto&#39; typ...
Definition: Type.h:6663
clang::ASTContext::NumImplicitCopyAssignmentOperators
static unsigned NumImplicitCopyAssignmentOperators
The number of implicitly-declared copy assignment operators.
Definition: ASTContext.h:2809
clang::CXXScopeSpec::isValid
bool isValid() const
A scope specifier is present, and it refers to a real scope.
Definition: DeclSpec.h:196
clang::Expr::IgnoreParenImpCasts
Expr * IgnoreParenImpCasts() LLVM_READONLY
IgnoreParenImpCasts - Ignore parentheses and implicit casts.
Definition: Expr.cpp:2693
clang::Scope::PushUsingDirective
void PushUsingDirective(UsingDirectiveDecl *UDir)
Definition: Scope.h:458
clang::Sema::DeclareImplicitDefaultConstructor
CXXConstructorDecl * DeclareImplicitDefaultConstructor(CXXRecordDecl *ClassDecl)
Declare the implicit default constructor for the given class.
Definition: SemaDeclCXX.cpp:10933
clang::Sema::InheritedConstructorInfo::findConstructorForBase
std::pair< CXXConstructorDecl *, bool > findConstructorForBase(CXXRecordDecl *Base, CXXConstructorDecl *Ctor) const
Find the constructor to use for inherited construction of a base class, and whether that base class c...
Definition: SemaDeclCXX.cpp:6290
clang::DeclSpec::forEachQualifier
void forEachQualifier(llvm::function_ref< void(TQ, StringRef, SourceLocation)> Handle)
This method calls the passed in handler on each qual being set.
Definition: DeclSpec.cpp:422
clang::FunctionTypeLoc::getNumParams
unsigned getNumParams() const
Definition: TypeLoc.h:1402
clang::TargetInfo::CCK_MicrosoftWin64
Definition: TargetInfo.h:1257
clang::DependentNameTypeLoc::setNameLoc
void setNameLoc(SourceLocation Loc)
Definition: TypeLoc.h:2022
clang::Sema::LookupSpecialMember
SpecialMemberOverloadResult LookupSpecialMember(CXXRecordDecl *D, CXXSpecialMember SM, bool ConstArg, bool VolatileArg, bool RValueThis, bool ConstThis, bool VolatileThis)
Definition: SemaLookup.cpp:2850
clang::CXXDestructorDecl::getOperatorDelete
const FunctionDecl * getOperatorDelete() const
Definition: DeclCXX.h:2738
clang::TypeLoc::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
Get the full source range.
Definition: TypeLoc.h:151
getImplicitMethodEPI
static FunctionProtoType::ExtProtoInfo getImplicitMethodEPI(Sema &S, CXXMethodDecl *MD)
Definition: SemaDeclCXX.cpp:6462
clang::UsingShadowDecl::getUsingDecl
UsingDecl * getUsingDecl() const
Gets the using declaration to which this declaration is tied.
Definition: DeclCXX.cpp:2682
clang::Scope::RemoveDecl
void RemoveDecl(Decl *D)
Definition: Scope.h:291
clang::LookupResult::Found
Name lookup found a single declaration that met the criteria.
Definition: Lookup.h:60
clang::CXXRecordDecl::needsOverloadResolutionForMoveConstructor
bool needsOverloadResolutionForMoveConstructor() const
Determine whether we need to eagerly declare a defaulted move constructor for this class...
Definition: DeclCXX.h:1098
clang::Sema::isCurrentClassName
bool isCurrentClassName(const IdentifierInfo &II, Scope *S, const CXXScopeSpec *SS=nullptr)
isCurrentClassName - Determine whether the identifier II is the name of the class type currently bein...
Definition: SemaDeclCXX.cpp:2122
clang::ObjCImplementationDecl
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2552
clang::CXXRecordDecl::MergeAccess
static AccessSpecifier MergeAccess(AccessSpecifier PathAccess, AccessSpecifier DeclAccess)
Calculates the access of a decl that is reached along a path.
Definition: DeclCXX.h:1864
clang::Type::isIncompleteArrayType
bool isIncompleteArrayType() const
Definition: Type.h:6353
clang::CXXRecordDecl::lookupInBases
bool lookupInBases(BaseMatchesCallback BaseMatches, CXXBasePaths &Paths, bool LookupInDependent=false) const
Look for entities within the base classes of this C++ class, transitively searching all base class su...
Definition: CXXInheritance.cpp:341
clang::RecordType
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4370
clang::ComplexType
Complex values, per C99 6.2.5p11.
Definition: Type.h:2477
clang::TemplateArgumentLoc
Location wrapper for a TemplateArgument.
Definition: TemplateBase.h:450
CheckOperatorNewDeclaration
static bool CheckOperatorNewDeclaration(Sema &SemaRef, const FunctionDecl *FnDecl)
Definition: SemaDeclCXX.cpp:13221
clang::OverridingMethods::const_iterator
MapType::const_iterator const_iterator
Definition: CXXInheritance.h:290
clang::ParsedAttr::UnknownAttribute
Definition: ParsedAttr.h:375
clang::ParmVarDecl::setUnparsedDefaultArg
void setUnparsedDefaultArg()
Specify that this parameter has an unparsed default argument.
Definition: Decl.h:1672
clang::ParmVarDecl::getUninstantiatedDefaultArg
Expr * getUninstantiatedDefaultArg()
Definition: Decl.cpp:2615
clang::Sema::CheckLiteralOperatorDeclaration
bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl)
CheckLiteralOperatorDeclaration - Check whether the declaration of this literal operator function is ...
Definition: SemaDeclCXX.cpp:13476
clang::ReferenceTypeLoc
Definition: TypeLoc.h:1283
clang::VarDecl::checkInitIsICE
bool checkInitIsICE() const
Determine whether the value of the initializer attached to this declaration is an integral constant e...
Definition: Decl.cpp:2330
clang::DeclSpec::getTypeQualifiers
unsigned getTypeQualifiers() const
getTypeQualifiers - Return a set of TQs.
Definition: DeclSpec.h:547
extendRight
static void extendRight(SourceRange &R, SourceRange After)
Definition: SemaDeclCXX.cpp:8426
clang::Type::getCanonicalTypeInternal
QualType getCanonicalTypeInternal() const
Definition: Type.h:2355
clang::DeclSpec::getVirtualSpecLoc
SourceLocation getVirtualSpecLoc() const
Definition: DeclSpec.h:575
clang::CXXCtorInitializer
Represents a C++ base or member initializer.
Definition: DeclCXX.h:2256
clang::LinkageSpecDecl::LanguageIDs
LanguageIDs
Represents the language in a linkage specification.
Definition: DeclCXX.h:2837
clang::Type::isIntegerType
bool isIntegerType() const
isIntegerType() does not include complex integers (a GCC extension).
Definition: Type.h:6578
clang::DependentNameTypeLoc
Definition: TypeLoc.h:1993
clang::TSK_ExplicitSpecialization
This template specialization was declared or defined by an explicit specialization (C++ [temp...
Definition: Specifiers.h:156
clang::DeclarationNameInfo::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
getSourceRange - The range of the declaration name.
Definition: DeclarationName.h:802
clang::CXXRecordDecl::needsOverloadResolutionForMoveAssignment
bool needsOverloadResolutionForMoveAssignment() const
Determine whether we need to eagerly declare a move assignment operator for this class.
Definition: DeclCXX.h:1172
clang::QualType::hasNonTrivialObjCLifetime
bool hasNonTrivialObjCLifetime() const
Definition: Type.h:1062
clang::CXXCtorInitializer::getIndirectMember
IndirectFieldDecl * getIndirectMember() const
Definition: DeclCXX.h:2406
clang::Decl::getAttr
T * getAttr() const
Definition: DeclBase.h:527
clang::Declarator::type_objects
type_object_range type_objects() const
Returns the range of type objects, from the identifier outwards.
Definition: DeclSpec.h:2192
clang::Sema::CheckDerivedToBaseConversion
bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, SourceLocation Loc, SourceRange Range, CXXCastPath *BasePath=nullptr, bool IgnoreAccess=false)
Definition: SemaDeclCXX.cpp:2687
clang::ConstantArrayType::getSize
const llvm::APInt & getSize() const
Definition: Type.h:2890
clang::ASTContext::DependentTy
CanQualType DependentTy
Definition: ASTContext.h:1045
clang::Type::isFunctionType
bool isFunctionType() const
Definition: Type.h:6292
TrivialSubobjectKind
TrivialSubobjectKind
The kind of subobject we are checking for triviality.
Definition: SemaDeclCXX.cpp:7464
clang::VarDecl::isStaticLocal
bool isStaticLocal() const
Returns true if a variable with function scope is a static local variable.
Definition: Decl.h:1060
clang::Sema::ActOnCXXMemberDeclarator
NamedDecl * ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, Declarator &D, MultiTemplateParamsArg TemplateParameterLists, Expr *BitfieldWidth, const VirtSpecifiers &VS, InClassInitStyle InitStyle)
ActOnCXXMemberDeclarator - This is invoked when a C++ class member declarator is parsed.
Definition: SemaDeclCXX.cpp:2931
GetKeyForBase
static const void * GetKeyForBase(ASTContext &Context, QualType BaseType)
Definition: SemaDeclCXX.cpp:4904
clang::DeclaratorDecl::getTypeSourceInfo
TypeSourceInfo * getTypeSourceInfo() const
Definition: Decl.h:716
clang::DeclaratorChunk::Pipe
Definition: DeclSpec.h:1150
clang::ClassTemplateDecl::getCanonicalDecl
ClassTemplateDecl * getCanonicalDecl() override
Retrieves the canonical declaration of this template.
Definition: DeclTemplate.h:2134
clang::CXXBasePaths::front
CXXBasePath & front()
Definition: CXXInheritance.h:197
clang::UnaryOperator::getOpcode
Opcode getOpcode() const
Definition: Expr.h:1921
clang::CXXConstructExpr::getArg
Expr * getArg(unsigned Arg)
Return the specified argument.
Definition: ExprCXX.h:1413
clang::Sema::isImplicitlyDeleted
bool isImplicitlyDeleted(FunctionDecl *FD)
Determine whether the given function is an implicitly-deleted special member function.
Definition: SemaDeclCXX.cpp:12756
clang::ReferenceType
Base for LValueReferenceType and RValueReferenceType.
Definition: Type.h:2673
clang::DeclContext::getRedeclContext
DeclContext * getRedeclContext()
getRedeclContext - Retrieve the context in which an entity conflicts with other entities of the same ...
Definition: DeclBase.cpp:1730
clang::ASTContext::hasSameType
bool hasSameType(QualType T1, QualType T2) const
Determine whether the given types T1 and T2 are equivalent.
Definition: ASTContext.h:2269
clang::DeclStmt::decls
decl_range decls()
Definition: Stmt.h:1186
clang::UsingShadowDecl::Create
static UsingShadowDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation Loc, UsingDecl *Using, NamedDecl *Target)
Definition: DeclCXX.h:3174
clang::TypeLoc::getTypeLocClass
TypeLocClass getTypeLocClass() const
Definition: TypeLoc.h:114
clang::Sema::BuildFieldReferenceExpr
ExprResult BuildFieldReferenceExpr(Expr *BaseExpr, bool IsArrow, SourceLocation OpLoc, const CXXScopeSpec &SS, FieldDecl *Field, DeclAccessPair FoundDecl, const DeclarationNameInfo &MemberNameInfo)
Definition: SemaExprMember.cpp:1739
clang::Sema::CreateBuiltinUnaryOp
ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, Expr *InputExpr)
Definition: SemaExpr.cpp:12854
clang::CXXMethodDecl::Create
static CXXMethodDecl * Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo, StorageClass SC, bool isInline, bool isConstexpr, SourceLocation EndLocation)
Definition: DeclCXX.cpp:1935
clang::TemplateArgument::Type
The template argument is a type.
Definition: TemplateBase.h:60
clang::ExceptionSpecificationType
ExceptionSpecificationType
The various types of exception specifications that exist in C++11.
Definition: ExceptionSpecificationType.h:21
clang::FunctionProtoType::ExceptionSpecInfo
Holds information about the various types of exception specification.
Definition: Type.h:3741
clang::FixItHint::CreateInsertion
static FixItHint CreateInsertion(SourceLocation InsertionLoc, StringRef Code, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code string at a specific location.
Definition: Diagnostic.h:92
clang::DeclContext::getExternCContext
const LinkageSpecDecl * getExternCContext() const
Retrieve the nearest enclosing C linkage specification context.
Definition: DeclBase.cpp:1133
clang::DeclContext::addDecl
void addDecl(Decl *D)
Add the declaration D into this context.
Definition: DeclBase.cpp:1507
PartialDiagnostic.h
Implements a partial diagnostic that can be emitted anwyhere in a DiagnosticBuilder stream...
clang::InheritableAttr::setInherited
void setInherited(bool I)
Definition: Attr.h:152
clang::Sema::AbstractFieldType
Definition: Sema.h:6118
clang::LookupResult::getLookupKind
Sema::LookupNameKind getLookupKind() const
Gets the kind of lookup to perform.
Definition: Lookup.h:251
clang::TTK_Class
The "class" keyword.
Definition: Type.h:5042
clang::CXXBaseSpecifier
Represents a base class of a C++ class.
Definition: DeclCXX.h:192
clang::UsingDecl::hasTypename
bool hasTypename() const
Return true if the using declaration has &#39;typename&#39;.
Definition: DeclCXX.h:3407
clang::Sema::isInitListConstructor
bool isInitListConstructor(const FunctionDecl *Ctor)
Determine whether Ctor is an initializer-list constructor, as defined in [dcl.init.list]p2.
Definition: SemaDeclCXX.cpp:9287
clang::Sema::checkClassLevelDLLAttribute
void checkClassLevelDLLAttribute(CXXRecordDecl *Class)
Check class-level dllimport/dllexport attribute.
Definition: SemaDeclCXX.cpp:5637
clang::Decl::markUsed
void markUsed(ASTContext &C)
Mark the declaration used, in the sense of odr-use.
Definition: DeclBase.cpp:412
clang::ASTContext::getTypeSize
uint64_t getTypeSize(QualType T) const
Return the size of the specified (complete) type T, in bits.
Definition: ASTContext.h:2070
clang::FunctionProtoType::ExceptionSpecInfo::Exceptions
ArrayRef< QualType > Exceptions
Explicitly-specified list of exception types.
Definition: Type.h:3746
clang::Scope::DeclScope
This is a scope that can contain a declaration.
Definition: Scope.h:60
clang::Type::isObjCObjectType
bool isObjCObjectType() const
Definition: Type.h:6397
clang::BindingDecl::Create
static BindingDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation IdLoc, IdentifierInfo *Id)
Definition: DeclCXX.cpp:2851
clang::ASTContext::Char8Ty
CanQualType Char8Ty
Definition: ASTContext.h:1022
clang::FunctionDecl::isInlined
bool isInlined() const
Determine whether this function should be inlined, because it is either marked "inline" or "constexpr...
Definition: Decl.h:2356
clang::Sema::LookupQualifiedName
bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, bool InUnqualifiedLookup=false)
Perform qualified name lookup into a given context.
Definition: SemaLookup.cpp:2013
clang::Declarator::getIdentifierLoc
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:2133
clang::ASTContext::getCanonicalType
CanQualType getCanonicalType(QualType T) const
Return the canonical (structural) type corresponding to the specified potentially non-canonical type ...
Definition: ASTContext.h:2253
clang::Sema::TrivialABIHandling
TrivialABIHandling
Definition: Sema.h:2289
GetKeyForMember
static const void * GetKeyForMember(ASTContext &Context, CXXCtorInitializer *Member)
Definition: SemaDeclCXX.cpp:4908
clang::CXXDefaultInitExpr
A use of a default initializer in a constructor or in aggregate initialization.
Definition: ExprCXX.h:1137
clang::Sema::getStdAlignValT
EnumDecl * getStdAlignValT() const
Definition: SemaDeclCXX.cpp:9008
clang::CXXScopeSpec::isSet
bool isSet() const
Deprecated.
Definition: DeclSpec.h:209
clang::Type::isLValueReferenceType
bool isLValueReferenceType() const
Definition: Type.h:6312
clang::CXXRecordDecl::needsImplicitCopyConstructor
bool needsImplicitCopyConstructor() const
Determine whether this class needs an implicit copy constructor to be lazily declared.
Definition: DeclCXX.h:1002
clang::TypeSourceInfo::getTypeLoc
TypeLoc getTypeLoc() const
Return the TypeLoc wrapper for the type source info.
Definition: TypeLoc.h:238
clang::CXXRecordDecl::getDescribedClassTemplate
ClassTemplateDecl * getDescribedClassTemplate() const
Retrieves the class template that is described by this class declaration.
Definition: DeclCXX.cpp:1619
clang::Declarator::setInvalidType
void setInvalidType(bool Val=true)
Definition: DeclSpec.h:2442
clang::Qualifiers::OCL_Weak
Reading or writing from this object requires a barrier call.
Definition: Type.h:172
IIK_Copy
Definition: SemaDeclCXX.cpp:4273
clang::FunctionProtoType::ExceptionSpecInfo::NoexceptExpr
Expr * NoexceptExpr
Noexcept expression, if this is a computed noexcept specification.
Definition: Type.h:3749
clang::Sema::ActOnParamDefaultArgumentError
void ActOnParamDefaultArgumentError(Decl *param, SourceLocation EqualLoc)
ActOnParamDefaultArgumentError - Parsing or semantic analysis of the default argument for the paramet...
Definition: SemaDeclCXX.cpp:356
clang::Sema::DefineImplicitLambdaToBlockPointerConversion
void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc, CXXConversionDecl *Conv)
Define the "body" of the conversion from a lambda object to a block pointer.
Definition: SemaDeclCXX.cpp:12818
clang::TemplateArgument::getKind
ArgKind getKind() const
Return the kind of stored template argument.
Definition: TemplateBase.h:235
clang::TemplateTypeParmType::getDepth
unsigned getDepth() const
Definition: Type.h:4565
BuildBasePathArray
static void BuildBasePathArray(const CXXBasePath &Path, CXXCastPath &BasePathArray)
Definition: SemaDeclCXX.cpp:2567
clang::FunctionProtoType::getParamType
QualType getParamType(unsigned i) const
Definition: Type.h:3890
clang::Sema::MaybeCreateExprWithCleanups
Expr * MaybeCreateExprWithCleanups(Expr *SubExpr)
MaybeCreateExprWithCleanups - If the current full-expression requires any cleanups, surround it with a ExprWithCleanups node.
Definition: SemaExprCXX.cpp:6503
clang::Sema::BuildDeclRefExpr
ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, ExprValueKind VK, SourceLocation Loc, const CXXScopeSpec *SS=nullptr)
Definition: SemaExpr.cpp:1687
clang::DeclaratorChunk::BlockPointer
Definition: DeclSpec.h:1150
clang::Stmt::printPretty
void printPretty(raw_ostream &OS, PrinterHelper *Helper, const PrintingPolicy &Policy, unsigned Indentation=0, StringRef NewlineSymbol="\, const ASTContext *Context=nullptr) const
Definition: StmtPrinter.cpp:2383
clang::ASTContext::getTranslationUnitDecl
TranslationUnitDecl * getTranslationUnitDecl() const
Definition: ASTContext.h:1009
clang::Sema::MarkBaseAndMemberDestructorsReferenced
void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, CXXRecordDecl *Record)
MarkBaseAndMemberDestructorsReferenced - Given a record decl, mark all the non-trivial destructors of...
Definition: SemaDeclCXX.cpp:5141
clang::ASTContext::Deallocate
void Deallocate(void *Ptr) const
Definition: ASTContext.h:675
clang::MemberExpr
MemberExpr - [C99 6.5.2.3] Structure and Union Members.
Definition: Expr.h:2682
functionDeclHasDefaultArgument
static bool functionDeclHasDefaultArgument(const FunctionDecl *FD)
Definition: SemaDeclCXX.cpp:420
clang::Sema::CheckOverrideControl
void CheckOverrideControl(NamedDecl *D)
CheckOverrideControl - Check C++11 override control semantics.
Definition: SemaDeclCXX.cpp:2745
clang::FunctionType::getCallConv
CallingConv getCallConv() const
Definition: Type.h:3623
clang::ThreadStorageClassSpecifier
ThreadStorageClassSpecifier
Thread storage-class-specifier.
Definition: Specifiers.h:193
clang::CXXRecordDecl::setImplicitMoveAssignmentIsDeleted
void setImplicitMoveAssignmentIsDeleted()
Set that we attempted to declare an implicit move assignment operator, but overload resolution failed...
Definition: DeclCXX.h:1151
clang::InitializationSequence
Describes the sequence of initializations required to initialize a given object or reference with a s...
Definition: Initialization.h:759
clang::NestedNameSpecifierLocBuilder::getWithLocInContext
NestedNameSpecifierLoc getWithLocInContext(ASTContext &Context) const
Retrieve a nested-name-specifier with location information, copied into the given AST context...
Definition: NestedNameSpecifier.cpp:701
clang::DeclSpec
Captures information about "declaration specifiers".
Definition: DeclSpec.h:228
clang::ExprResult
ActionResult< Expr * > ExprResult
Definition: Ownership.h:267
clang::QualType::getUnqualifiedType
QualType getUnqualifiedType() const
Retrieve the unqualified variant of the given type, removing as little sugar as possible.
Definition: Type.h:6152
clang::DeclSpec::getRestrictSpecLoc
SourceLocation getRestrictSpecLoc() const
Definition: DeclSpec.h:549
CheckConstexprParameterTypes
static bool CheckConstexprParameterTypes(Sema &SemaRef, const FunctionDecl *FD)
Definition: SemaDeclCXX.cpp:1556
clang::ParmVarDecl::setDefaultArg
void setDefaultArg(Expr *defarg)
Definition: Decl.cpp:2585
clang::FieldDecl::isMutable
bool isMutable() const
Determines whether this field is mutable (C++ only).
Definition: Decl.h:2654
clang::SourceRange::setEnd
void setEnd(SourceLocation e)
Definition: SourceLocation.h:211
clang::ASTContext::getCurrentKeyFunction
const CXXMethodDecl * getCurrentKeyFunction(const CXXRecordDecl *RD)
Get our current best idea for the key function of the given record decl, or nullptr if there isn&#39;t on...
Definition: RecordLayoutBuilder.cpp:3055
clang::CXXRecordDecl
Represents a C++ struct/union/class.
Definition: DeclCXX.h:300
clang::BinaryOperator::isCompoundAssignmentOp
static bool isCompoundAssignmentOp(Opcode Opc)
Definition: Expr.h:3415
clang::ObjCImplementationDecl::setIvarInitializers
void setIvarInitializers(ASTContext &C, CXXCtorInitializer **initializers, unsigned numInitializers)
Definition: DeclObjC.cpp:2170
clang::SourceRange::isValid
bool isValid() const
Definition: SourceLocation.h:213
clang::CXXRecordDecl::hasUserDeclaredMoveConstructor
bool hasUserDeclaredMoveConstructor() const
Determine whether this class has had a move constructor declared by the user.
Definition: DeclCXX.h:1049
clang::Sema::CompleteConstructorCall
bool CompleteConstructorCall(CXXConstructorDecl *Constructor, MultiExprArg ArgsPtr, SourceLocation Loc, SmallVectorImpl< Expr *> &ConvertedArgs, bool AllowExplicit=false, bool IsListInitialization=false)
Given a constructor and the set of arguments provided for the constructor, convert the arguments and ...
Definition: SemaDeclCXX.cpp:13090
clang::Sema::ActOnPureSpecifier
void ActOnPureSpecifier(Decl *D, SourceLocation PureSpecLoc)
Definition: SemaDeclCXX.cpp:14889
clang::Sema::SetCtorInitializers
bool SetCtorInitializers(CXXConstructorDecl *Constructor, bool AnyErrors, ArrayRef< CXXCtorInitializer *> Initializers=None)
Definition: SemaDeclCXX.cpp:4716
clang::ASTContext::getRValueReferenceType
QualType getRValueReferenceType(QualType T) const
Return the uniqued reference to the type for an rvalue reference to the specified type...
Definition: ASTContext.cpp:3006
IIK_Inherit
Definition: SemaDeclCXX.cpp:4275
clang::Type::isVoidType
bool isVoidType() const
Definition: Type.h:6544
clang::Sema::AttachBaseSpecifiers
bool AttachBaseSpecifiers(CXXRecordDecl *Class, MutableArrayRef< CXXBaseSpecifier *> Bases)
Performs the actual work of attaching the given base class specifiers to a C++ class.
Definition: SemaDeclCXX.cpp:2404
clang::Sema::AbstractVariableType
Definition: Sema.h:6117
clang::BinaryConditionalOperator
BinaryConditionalOperator - The GNU extension to the conditional operator which allows the middle ope...
Definition: Expr.h:3655
clang::CXXCatchStmt
CXXCatchStmt - This represents a C++ catch block.
Definition: StmtCXX.h:29
clang::Sema::CheckExplicitlyDefaultedSpecialMember
void CheckExplicitlyDefaultedSpecialMember(CXXMethodDecl *MD)
Definition: SemaDeclCXX.cpp:6498
clang::FunctionDecl::setConstexpr
void setConstexpr(bool IC)
Definition: Decl.h:2095
RecordLayout.h
clang::Sema::DiagnoseReturnInConstructorExceptionHandler
void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock)
Definition: SemaDeclCXX.cpp:14707
clang::frontend::CPlusPlus14
Definition: LangStandard.h:28
clang::SourceLocation::isInvalid
bool isInvalid() const
Definition: SourceLocation.h:109
clang::QualType::getQualifiers
Qualifiers getQualifiers() const
Retrieve the set of qualifiers applied to this type.
Definition: Type.h:6099
clang::Sema::ActOnParamUnparsedDefaultArgument
void ActOnParamUnparsedDefaultArgument(Decl *param, SourceLocation EqualLoc, SourceLocation ArgLoc)
ActOnParamUnparsedDefaultArgument - We&#39;ve seen a default argument for a function parameter, but we can&#39;t parse it yet because we&#39;re inside a class definition.
Definition: SemaDeclCXX.cpp:343
isTupleLike
static IsTupleLike isTupleLike(Sema &S, SourceLocation Loc, QualType T, llvm::APSInt &Size)
Definition: SemaDeclCXX.cpp:1001
clang::Sema::popCodeSynthesisContext
void popCodeSynthesisContext()
Definition: SemaTemplateInstantiate.cpp:367
clang::FunctionTypeLoc::setParam
void setParam(unsigned i, ParmVarDecl *VD)
Definition: TypeLoc.h:1409
clang::CXXScopeSpec::isNotEmpty
bool isNotEmpty() const
A scope specifier is present, but may be valid or invalid.
Definition: DeclSpec.h:191
clang::ASTContext::Char16Ty
CanQualType Char16Ty
Definition: ASTContext.h:1023
clang::ASTContext::removeAddrSpaceQualType
QualType removeAddrSpaceQualType(QualType T) const
Remove any existing address space on the type and returns the type with qualifiers intact (or that&#39;s ...
Definition: ASTContext.cpp:2672
clang::AttrSyntax::C
clang::Attr::isInherited
bool isInherited() const
Definition: Attr.h:98
hasOneRealArgument
static bool hasOneRealArgument(MultiExprArg Args)
Determine whether the given list arguments contains exactly one "real" (non-default) argument...
Definition: SemaDeclCXX.cpp:12872
clang::Sema::CheckBaseClassAccess
AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, QualType Base, QualType Derived, const CXXBasePath &Path, unsigned DiagID, bool ForceCheck=false, bool ForceUnprivileged=false)
Checks access for a hierarchy conversion.
Definition: SemaAccess.cpp:1825
clang::Declarator::getDeclSpec
const DeclSpec & getDeclSpec() const
getDeclSpec - Return the declaration-specifier that this declarator was declared with.
Definition: DeclSpec.h:1854
clang::ASTContext::NumImplicitCopyConstructorsDeclared
static unsigned NumImplicitCopyConstructorsDeclared
The number of implicitly-declared copy constructors for which declarations were built.
Definition: ASTContext.h:2799
clang::Sema::CurContext
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:336
clang::DeclSpec::TQ_volatile
Definition: DeclSpec.h:317
clang::FriendDecl::setUnsupportedFriend
void setUnsupportedFriend(bool Unsupported)
Definition: DeclFriend.h:178
clang::UsingDecl::Create
static UsingDecl * Create(ASTContext &C, DeclContext *DC, SourceLocation UsingL, NestedNameSpecifierLoc QualifierLoc, const DeclarationNameInfo &NameInfo, bool HasTypenameKeyword)
Definition: DeclCXX.cpp:2742
clang::ClassTemplateDecl
Declaration of a class template.
Definition: DeclTemplate.h:2049
clang::ASTContext::getPointerType
QualType getPointerType(QualType T) const
Return the uniqued reference to the type for a pointer to the specified type.
Definition: ASTContext.cpp:2847
clang::DeclSpec::isVirtualSpecified
bool isVirtualSpecified() const
Definition: DeclSpec.h:574
clang::FixItHint::CreateReplacement
static FixItHint CreateReplacement(CharSourceRange RemoveRange, StringRef Code)
Create a code modification hint that replaces the given source range with the given code string...
Definition: Diagnostic.h:129
clang::Decl::addAttr
void addAttr(Attr *A)
Definition: DeclBase.cpp:840
clang::CXXRecordDecl::lambdaIsDefaultConstructibleAndAssignable
bool lambdaIsDefaultConstructibleAndAssignable() const
Determine whether this lambda should have an implicit default constructor and copy and move assignmen...
Definition: DeclCXX.cpp:631
clang::LookupResult::getAcceptableDecl
NamedDecl * getAcceptableDecl(NamedDecl *D) const
Retrieve the accepted (re)declaration of the given declaration, if there is one.
Definition: Lookup.h:350
clang::Sema::getSourceManager
SourceManager & getSourceManager() const
Definition: Sema.h:1236
clang::ParmVarDecl::getDefaultArgRange
SourceRange getDefaultArgRange() const
Retrieve the source range that covers the entire default argument.
Definition: Decl.cpp:2590
clang::LookupResult::end
iterator end() const
Definition: Lookup.h:325
clang::UnqualifiedIdKind::IK_TemplateId
A template-id, e.g., f<int>.
clang::Sema::CheckOverridingFunctionReturnType
bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, const CXXMethodDecl *Old)
CheckOverridingFunctionReturnType - Checks whether the return types are covariant, according to C++ [class.virtual]p5.
Definition: SemaDeclCXX.cpp:14762
clang::DeclContextLookupResult::begin
iterator begin() const
Definition: DeclBase.h:1228
clang::CXXRecordDecl::hasInheritedAssignment
bool hasInheritedAssignment() const
Determine whether this class has a using-declaration that names a base class assignment operator...
Definition: DeclCXX.h:1532
clang::Stmt::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
SourceLocation tokens are not useful in isolation - they are low level value objects created/interpre...
Definition: Stmt.cpp:276
clang::Diagnostic
A little helper class (which is basically a smart pointer that forwards info from DiagnosticsEngine) ...
Definition: Diagnostic.h:1316
clang::StringLiteral
StringLiteral - This represents a string literal expression, e.g.
Definition: Expr.h:1566
TargetInfo.h
Defines the clang::TargetInfo interface.
clang::CallExpr
CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]).
Definition: Expr.h:2396
clang::CXXBasePath::Access
AccessSpecifier Access
The access along this inheritance path.
Definition: CXXInheritance.h:76
clang::TargetCXXABI::isMicrosoft
bool isMicrosoft() const
Is this ABI an MSVC-compatible ABI?
Definition: TargetCXXABI.h:154
clang::DeclSpec::isInlineSpecified
bool isInlineSpecified() const
Definition: DeclSpec.h:567
defaultedSpecialMemberIsConstexpr
static bool defaultedSpecialMemberIsConstexpr(Sema &S, CXXRecordDecl *ClassDecl, Sema::CXXSpecialMember CSM, bool ConstArg, CXXConstructorDecl *InheritedCtor=nullptr, Sema::InheritedConstructorInfo *Inherited=nullptr)
Determine whether the specified special member function would be constexpr if it were implicitly defi...
Definition: SemaDeclCXX.cpp:6338
clang::FunctionDecl::getSourceRange
SourceRange getSourceRange() const override LLVM_READONLY
Source range that this declaration covers.
Definition: Decl.cpp:3637
clang::FunctionDecl::doesThisDeclarationHaveABody
bool doesThisDeclarationHaveABody() const
Returns whether this specific declaration of the function has a body.
Definition: Decl.h:1989
clang::DeclSpec::getAtomicSpecLoc
SourceLocation getAtomicSpecLoc() const
Definition: DeclSpec.h:551
clang::ExprError
ExprResult ExprError()
Definition: Ownership.h:283
clang::Qualifiers::hasVolatile
bool hasVolatile() const
Definition: Type.h:263
clang::UnqualifiedIdKind::IK_ConstructorName
A constructor name.
clang::DeclaratorChunk::MemberPointer
Definition: DeclSpec.h:1150
clang::ASTContext::adjustExceptionSpec
void adjustExceptionSpec(FunctionDecl *FD, const FunctionProtoType::ExceptionSpecInfo &ESI, bool AsWritten=false)
Change the exception specification on a function once it is delay-parsed, instantiated, or computed.
Definition: ASTContext.cpp:2789
clang::Sema::AbstractParamType
Definition: Sema.h:6116
clang::Sema::CheckFriendTypeDecl
FriendDecl * CheckFriendTypeDecl(SourceLocation LocStart, SourceLocation FriendLoc, TypeSourceInfo *TSInfo)
Perform semantic analysis of the given friend type declaration.
Definition: SemaDeclCXX.cpp:13965
clang::LambdaExpr::capture_begin
capture_iterator capture_begin() const
Retrieve an iterator pointing to the first lambda capture.
Definition: ExprCXX.cpp:1158
CheckAbstractClassUsage
static void CheckAbstractClassUsage(AbstractUsageInfo &Info, CXXMethodDecl *MD)
Check for invalid uses of an abstract type in a method declaration.
Definition: SemaDeclCXX.cpp:5476
clang::UsingDecl::getQualifier
NestedNameSpecifier * getQualifier() const
Retrieve the nested-name-specifier that qualifies the name.
Definition: DeclCXX.h:3395
clang::TemplateName::getKind
NameKind getKind() const
Definition: TemplateName.cpp:79
clang::ASTContext::IntTy
CanQualType IntTy
Definition: ASTContext.h:1025
clang::VectorType::getNumElements
unsigned getNumElements() const
Definition: Type.h:3204
clang::Redeclarable::getMostRecentDecl
decl_type * getMostRecentDecl()
Returns the most recent (re)declaration of this declaration.
Definition: Redeclarable.h:226
clang::TranslationUnitDecl
The top declaration context.
Definition: Decl.h:108
clang::Type::isDependentType
bool isDependentType() const
Whether this type is a dependent type, meaning that its definition somehow depends on a template para...
Definition: Type.h:2079
clang::DeclSpec::getConstexprSpecLoc
SourceLocation getConstexprSpecLoc() const
Definition: DeclSpec.h:728
clang::TemplateArgument::getAsType
QualType getAsType() const
Retrieve the type for a type template argument.
Definition: TemplateBase.h:257
clang::DeclRefExpr
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:1041
clang::Sema::CheckConversionDeclarator
void CheckConversionDeclarator(Declarator &D, QualType &R, StorageClass &SC)
CheckConversionDeclarator - Called by ActOnDeclarator to check the well-formednes of the conversion f...
Definition: SemaDeclCXX.cpp:8440
clang::Scope::getFnParent
const Scope * getFnParent() const
getFnParent - Return the closest scope that is a function body.
Definition: Scope.h:230
clang::DeclaratorChunk::FunctionTypeInfo::hasRefQualifier
bool hasRefQualifier() const
Determine whether this function declaration contains a ref-qualifier.
Definition: DeclSpec.h:1445
clang::DiagnosticsEngine::isIgnored
bool isIgnored(unsigned DiagID, SourceLocation Loc) const
Determine whether the diagnostic is known to be ignored.
Definition: Diagnostic.h:819
clang::TagDecl::isUnion
bool isUnion() const
Definition: Decl.h:3252
clang::TemplateSpecializationType
Represents a type template specialization; the template must be a class template, a type alias templa...
Definition: Type.h:4841
clang::NamedDecl::getMostRecentDecl
NamedDecl * getMostRecentDecl()
Definition: Decl.h:446
clang::BinaryOperator::getRHS
Expr * getRHS() const
Definition: Expr.h:3329
clang::LangOptions::MSVC2015
Definition: LangOptions.h:111
clang::Sema::DiagnoseHiddenVirtualMethods
void DiagnoseHiddenVirtualMethods(CXXMethodDecl *MD)
Diagnose methods which overload virtual methods in a base class without overriding any...
Definition: SemaDeclCXX.cpp:7846
clang::Sema::DeclareImplicitCopyAssignment
CXXMethodDecl * DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl)
Declare the implicit copy assignment operator for the given class.
Definition: SemaDeclCXX.cpp:11802
clang::FunctionDecl::isDeleted
bool isDeleted() const
Whether this function has been deleted.
Definition: Decl.h:2136
clang::Type::isPointerType
bool isPointerType() const
Definition: Type.h:6296
clang::Sema::SpecialMemberOverloadResult::NoMemberOrDeleted
Definition: Sema.h:1066
clang::Sema::BuildCXXDefaultInitExpr
ExprResult BuildCXXDefaultInitExpr(SourceLocation Loc, FieldDecl *Field)
Definition: SemaDeclCXX.cpp:12980
clang::FunctionDecl::getTemplatedKind
TemplatedKind getTemplatedKind() const
What kind of templated function this is.
Definition: Decl.cpp:3316
clang::TypedefType
Definition: Type.h:4151
clang::CXXRecordDecl::implicitCopyConstructorHasConstParam
bool implicitCopyConstructorHasConstParam() const
Determine whether an implicit copy constructor for this type would have a parameter with a const-qual...
Definition: DeclCXX.h:1023
clang::CXXBasePaths
BasePaths - Represents the set of paths from a derived class to one of its (direct or indirect) bases...
Definition: CXXInheritance.h:119
clang::ASTConsumer::HandleTopLevelDecl
virtual bool HandleTopLevelDecl(DeclGroupRef D)
HandleTopLevelDecl - Handle the specified top-level declaration.
Definition: ASTConsumer.cpp:19
clang::Qualifiers::addAddressSpace
void addAddressSpace(LangAS space)
Definition: Type.h:378
clang::LookupResult::setBaseObjectType
void setBaseObjectType(QualType T)
Sets the base object type for this lookup.
Definition: Lookup.h:409
clang::ASTContext::getTypeSizeInChars
CharUnits getTypeSizeInChars(QualType T) const
Return the size of the specified (complete) type T, in characters.
Definition: ASTContext.cpp:2167
clang::FixItHint
Annotates a diagnostic with some code that should be inserted, removed, or replaced to fix the proble...
Definition: Diagnostic.h:66
clang::CXXRecordDecl::needsImplicitMoveConstructor
bool needsImplicitMoveConstructor() const
Determine whether this class should get an implicit move constructor or if any existing special membe...
Definition: DeclCXX.h:1088
clang::DecompositionDeclarator::bindings
ArrayRef< Binding > bindings() const
Definition: DeclSpec.h:1701
clang::Sema::CheckDestructor
bool CheckDestructor(CXXDestructorDecl *Destructor)
CheckDestructor - Checks a fully-formed destructor definition for well-formedness, issuing any diagnostics required.
Definition: SemaDeclCXX.cpp:8256
clang::Declarator::getContext
DeclaratorContext getContext() const
Definition: DeclSpec.h:1879
clang::VarDecl::isStaticDataMember
bool isStaticDataMember() const
Determines whether this is a static data member.
Definition: Decl.h:1135
clang::TagDecl::getInnerLocStart
SourceLocation getInnerLocStart() const
Return SourceLocation representing start of source range ignoring outer template declarations.
Definition: Decl.h:3150
clang::LookupResult::suppressDiagnostics
void suppressDiagnostics()
Suppress the diagnostics that would normally fire because of this lookup.
Definition: Lookup.h:572
clang::Sema::CXXMoveAssignment
Definition: Sema.h:1172
clang::NamespaceDecl::getAnonymousNamespace
NamespaceDecl * getAnonymousNamespace() const
Retrieve the anonymous namespace nested inside this namespace, if any.
Definition: Decl.h:598
clang::CXXRecordDecl::hasDirectFields
bool hasDirectFields() const
Determine whether this class has direct non-static data members.
Definition: DeclCXX.h:1330
clang::MSPropertyDecl
An instance of this class represents the declaration of a property member.
Definition: DeclCXX.h:3912
clang::ActionResult::getAs
T * getAs()
Definition: Ownership.h:175
clang::DeclarationName::getCXXLiteralIdentifier
IdentifierInfo * getCXXLiteralIdentifier() const
If this name is the name of a literal operator, retrieve the identifier associated with it...
Definition: DeclarationName.h:473
clang::ValueDecl::getType
QualType getType() const
Definition: Decl.h:648
clang::VK_LValue
An l-value expression is a reference to an object with independent storage.
Definition: Specifiers.h:114
clang::LookupResult::empty
bool empty() const
Return true if no decls were found.
Definition: Lookup.h:328
clang::ComparisonCategoryInfo::getType
QualType getType() const
Definition: ComparisonCategories.cpp:146
clang::Sema::CXXDefaultConstructor
Definition: Sema.h:1168
clang::SourceRange
A trivial tuple used to represent a source range.
Definition: SourceLocation.h:198
clang::FunctionProtoType::ExtProtoInfo::Variadic
bool Variadic
Definition: Type.h:3769
clang::DeclContextLookupResult::iterator
Definition: DeclBase.h:1212
clang::Decl::setLexicalDeclContext
void setLexicalDeclContext(DeclContext *DC)
Definition: DeclBase.cpp:299
clang::Sema::Context
ASTContext & Context
Definition: Sema.h:324
clang::Sema::CorrectTypo
TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, Sema::LookupNameKind LookupKind, Scope *S, CXXScopeSpec *SS, std::unique_ptr< CorrectionCandidateCallback > CCC, CorrectTypoKind Mode, DeclContext *MemberContext=nullptr, bool EnteringContext=false, const ObjCObjectPointerType *OPT=nullptr, bool RecordFailure=true)
Try to "correct" a typo in the source code by finding visible declarations whose names are similar to...
Definition: SemaLookup.cpp:4722
clang::FunctionDecl::getCanonicalDecl
FunctionDecl * getCanonicalDecl() override
Retrieves the "canonical" declaration of the given declaration.
Definition: Decl.cpp:2983
clang::CXXBasePaths::end
paths_iterator end()
Definition: CXXInheritance.h:193
clang::DeclarationName::CXXOperatorName
Definition: DeclarationName.h:210
clang::NamedDecl
This represents a decl that may have a name.
Definition: Decl.h:249
clang::Sema::TypeDiagnoser::diagnose
virtual void diagnose(Sema &S, SourceLocation Loc, QualType T)=0
clang::Decl::dropAttr
void dropAttr()
Definition: DeclBase.h:502
clang::DeclContext::isTranslationUnit
bool isTranslationUnit() const
Definition: DeclBase.h:1823
clang::DeclSpec::getRepAsExpr
Expr * getRepAsExpr() const
Definition: DeclSpec.h:500
clang::TemplateTypeParmType
Definition: Type.h:4522
clang::TypeLoc::castAs
T castAs() const
Convert to the specified TypeLoc type, asserting that this TypeLoc is of the desired type...
Definition: TypeLoc.h:76
clang::Decl::setAccess
void setAccess(AccessSpecifier AS)
Definition: DeclBase.h:457
clang::ASTContext::BoolTy
CanQualType BoolTy
Definition: ASTContext.h:1017
clang::NamespaceAliasDecl
Represents a C++ namespace alias.
Definition: DeclCXX.h:3020
clang::Sema::ActOnTemplatedFriendTag
Decl * ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, unsigned TagSpec, SourceLocation TagLoc, CXXScopeSpec &SS, IdentifierInfo *Name, SourceLocation NameLoc, const ParsedAttributesView &Attr, MultiTemplateParamsArg TempParamLists)
Handle a friend tag declaration where the scope specifier was templated.
Definition: SemaDeclCXX.cpp:14037
clang::ETK_None
No keyword precedes the qualified type name.
Definition: Type.h:5071
clang::CXXBaseSpecifier::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
Retrieves the source range that contains the entire base specifier.
Definition: DeclCXX.h:235
clang::Sema::MakeFullDiscardedValueExpr
FullExprArg MakeFullDiscardedValueExpr(Expr *Arg)
Definition: Sema.h:3696
clang::LookupResult::begin
iterator begin() const
Definition: Lookup.h:324
clang::UsingDirectiveDecl
Represents C++ using-directive.
Definition: DeclCXX.h:2916
clang::Sema::DiagnoseAbstractType
void DiagnoseAbstractType(const CXXRecordDecl *RD)
Definition: SemaDeclCXX.cpp:5307
CastForMoving
static Expr * CastForMoving(Sema &SemaRef, Expr *E, QualType T=QualType())
Definition: SemaDeclCXX.cpp:4256
clang::CXXRecordDecl::isAggregate
bool isAggregate() const
Determine whether this class is an aggregate (C++ [dcl.init.aggr]), which is a class with no user-dec...
Definition: DeclCXX.h:1284
clang::InitializedEntity
Describes an entity that is being initialized.
Definition: Initialization.h:49
ComparisonCategories.h
clang::ClassTemplateSpecializationDecl::getPointOfInstantiation
SourceLocation getPointOfInstantiation() const
Get the point of instantiation (if any), or null if none.
Definition: DeclTemplate.h:1763
clang::Attr::getKind
attr::Kind getKind() const
Definition: Attr.h:87
clang::Sema::ActOnMemInitializer
MemInitResult ActOnMemInitializer(Decl *ConstructorD, Scope *S, CXXScopeSpec &SS, IdentifierInfo *MemberOrBase, ParsedType TemplateTypeTy, const DeclSpec &DS, SourceLocation IdLoc, SourceLocation LParenLoc, ArrayRef< Expr *> Args, SourceLocation RParenLoc, SourceLocation EllipsisLoc)
Handle a C++ member initializer using parentheses syntax.
Definition: SemaDeclCXX.cpp:3762
clang::LookupResult::getRepresentativeDecl
NamedDecl * getRepresentativeDecl() const
Fetches a representative decl. Useful for lazy diagnostics.
Definition: Lookup.h:513
clang::ComparisonCategoryType
ComparisonCategoryType
An enumeration representing the different comparison categories types.
Definition: ComparisonCategories.h:44
clang::DeclContextLookupResult::empty
bool empty() const
Definition: DeclBase.h:1231
clang::NestedNameSpecifier::Global
The global specifier &#39;::&#39;. There is no stored value.
Definition: NestedNameSpecifier.h:96
clang::ASTContext::getCanonicalNestedNameSpecifier
NestedNameSpecifier * getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const
Retrieves the "canonical" nested name specifier for a given nested name specifier.
Definition: ASTContext.cpp:5354
clang::Sema::ActOnDecompositionDeclarator
NamedDecl * ActOnDecompositionDeclarator(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParamLists)
Definition: SemaDeclCXX.cpp:687
TSK_CompleteObject
The object is actually the complete object.
Definition: SemaDeclCXX.cpp:7470
clang::FunctionDecl::getNumParams
unsigned getNumParams() const
Return the number of parameters this function must have based on its FunctionType.
Definition: Decl.cpp:3055
clang::ValueDecl::setType
void setType(QualType newType)
Definition: Decl.h:649
clang::CXXConstructorDecl::Create
static CXXConstructorDecl * Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo, bool isExplicit, bool isInline, bool isImplicitlyDeclared, bool isConstexpr, InheritedConstructor Inherited=InheritedConstructor())
Definition: DeclCXX.cpp:2326
clang::CXXRecordDecl::ctors
ctor_range ctors() const
Definition: DeclCXX.h:885
clang::Sema::ActOnAliasDeclaration
Decl * ActOnAliasDeclaration(Scope *CurScope, AccessSpecifier AS, MultiTemplateParamsArg TemplateParams, SourceLocation UsingLoc, UnqualifiedId &Name, const ParsedAttributesView &AttrList, TypeResult Type, Decl *DeclFromDeclSpec)
Definition: SemaDeclCXX.cpp:10485
clang::VarDecl::hasInit
bool hasInit() const
Definition: Decl.cpp:2164
clang::PointerTypeLoc
Wrapper for source info for pointers.
Definition: TypeLoc.h:1202
clang::SourceRange::getBegin
SourceLocation getBegin() const
Definition: SourceLocation.h:207
clang::ParsedAttributes
ParsedAttributes - A collection of parsed attributes.
Definition: ParsedAttr.h:855
ColonLoc
SourceLocation ColonLoc
Location of &#39;:&#39;.
Definition: OpenMPClause.h:108
clang::TemplateParameterList::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
Definition: DeclTemplate.h:176
clang::ASTContext::getLangOpts
const LangOptions & getLangOpts() const
Definition: ASTContext.h:707
clang::TypoCorrection::WillReplaceSpecifier
void WillReplaceSpecifier(bool ForceReplacement)
Definition: TypoCorrection.h:101
clang::ParmVarDecl::isParameterPack
bool isParameterPack() const
Determine whether this parameter is actually a function parameter pack.
Definition: Decl.cpp:2629
clang::BlockPointerTypeLoc
Wrapper for source info for block pointers.
Definition: TypeLoc.h:1215
clang::FunctionDecl::setDeletedAsWritten
void setDeletedAsWritten(bool D=true)
Definition: Decl.h:2144
clang::Sema::AddImplicitlyDeclaredMembersToClass
void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl)
AddImplicitlyDeclaredMembersToClass - Adds any implicitly-declared special functions, such as the default constructor, copy constructor, or destructor, to the given C++ class (C++ [special]p1).
Definition: SemaDeclCXX.cpp:7936
clang::UnqualifiedIdKind::IK_ImplicitSelfParam
An implicit &#39;self&#39; parameter.
clang::InheritableAttr
Definition: Attr.h:143
clang::Sema::SetIvarInitializers
void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation)
SetIvarInitializers - This routine builds initialization ASTs for the Objective-C implementation whos...
Definition: SemaDeclCXX.cpp:15194
clang::ICIS_NoInit
No in-class initializer.
Definition: Specifiers.h:230
clang::CXXRecordDecl::vbases
base_class_range vbases()
Definition: DeclCXX.h:840
clang::ConstantArrayType
Represents the canonical version of C arrays with a specified constant size.
Definition: Type.h:2872
clang::FunctionProtoType::ExtProtoInfo::ExceptionSpec
ExceptionSpecInfo ExceptionSpec
Definition: Type.h:3773
clang::InitializedEntity::InitializeBinding
static InitializedEntity InitializeBinding(VarDecl *Binding)
Create the initialization entity for a structured binding.
Definition: Initialization.h:385
clang::UnqualifiedIdKind::IK_DeductionGuideName
A deduction-guide name (a template-name)
clang::FunctionTemplateDecl
Declaration of a template function.
Definition: DeclTemplate.h:969
clang::Sema::ActOnUsingDeclaration
Decl * ActOnUsingDeclaration(Scope *CurScope, AccessSpecifier AS, SourceLocation UsingLoc, SourceLocation TypenameLoc, CXXScopeSpec &SS, UnqualifiedId &Name, SourceLocation EllipsisLoc, const ParsedAttributesView &AttrList)
Definition: SemaDeclCXX.cpp:9455
clang::ImplicitValueInitExpr
Represents an implicitly-generated value initialization of an object of a given type.
Definition: Expr.h:4893
clang::Sema::SetDelegatingInitializer
bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, CXXCtorInitializer *Initializer)
Definition: SemaDeclCXX.cpp:4695
clang::Sema::DiagnoseAbsenceOfOverrideControl
void DiagnoseAbsenceOfOverrideControl(NamedDecl *D)
DiagnoseAbsenceOfOverrideControl - Diagnose if &#39;override&#39; keyword was not used in the declaration of ...
Definition: SemaDeclCXX.cpp:2813
clang::DeclaratorChunk::FunctionTypeInfo::Params
ParamInfo * Params
Params - This is a pointer to a new[]&#39;d array of ParamInfo objects that describe the parameters speci...
Definition: DeclSpec.h:1313
clang::ElaboratedTypeLoc::setElaboratedKeywordLoc
void setElaboratedKeywordLoc(SourceLocation Loc)
Definition: TypeLoc.h:1943
Comparison
Comparison
Definition: SemaOverload.cpp:8998
clang::Sema::UnusedPrivateFields
NamedDeclSetType UnusedPrivateFields
Set containing all declared private fields that are not used.
Definition: Sema.h:569
checkLiteralOperatorTemplateParameterList
static bool checkLiteralOperatorTemplateParameterList(Sema &SemaRef, FunctionTemplateDecl *TpDecl)
Definition: SemaDeclCXX.cpp:13431
getMSPropertyAttr
static const ParsedAttr * getMSPropertyAttr(const ParsedAttributesView &list)
Definition: SemaDeclCXX.cpp:2864
clang::Attr
Attr - This represents one attribute.
Definition: Attr.h:44
clang::DeclSpec::getAttributes
ParsedAttributes & getAttributes()
Definition: DeclSpec.h:762
clang::Decl::getLocation
SourceLocation getLocation() const
Definition: DeclBase.h:418
clang::UsingShadowDecl
Represents a shadow declaration introduced into a scope by a (resolved) using declaration.
Definition: DeclCXX.h:3139
clang::NamedDecl::isExternallyVisible
bool isExternallyVisible() const
Definition: Decl.h:380
Std
LangStandard::Kind Std
Definition: InterpolatingCompilationDatabase.cpp:130
clang::TypeSourceInfo::getType
QualType getType() const
Return the type wrapped by this type source info.
Definition: Decl.h:98
clang::TemplateName::Template
A single template declaration.
Definition: TemplateName.h:192
clang::TagDecl::isBeingDefined
bool isBeingDefined() const
Return true if this decl is currently being defined.
Definition: Decl.h:3189
clang::InheritedConstructor::getShadowDecl
ConstructorUsingShadowDecl * getShadowDecl() const
Definition: DeclCXX.h:2470
clang::EST_NoexceptTrue
noexcept(expression), evals to &#39;true&#39;
Definition: ExceptionSpecificationType.h:29
clang::Sema::SemaDiagnosticBuilder
Helper class that creates diagnostics with optional template instantiation stacks.
Definition: Sema.h:1261
clang::Expr::IgnoreParens
Expr * IgnoreParens() LLVM_READONLY
IgnoreParens - Ignore parentheses.
Definition: Expr.cpp:2560
clang::Sema::ActOnConversionDeclarator
Decl * ActOnConversionDeclarator(CXXConversionDecl *Conversion)
ActOnConversionDeclarator - Called by ActOnDeclarator to complete the declaration of the given C++ co...
Definition: SemaDeclCXX.cpp:8606
clang::DeclContext::decls_end
decl_iterator decls_end() const
Definition: DeclBase.h:1999
clang::Sema::TAH_IgnoreTrivialABI
The triviality of a method unaffected by "trivial_abi".
Definition: Sema.h:2291
clang::ASTContext::getSizeType
CanQualType getSizeType() const
Return the unique type for "size_t" (C99 7.17), defined in <stddef.h>.
Definition: ASTContext.cpp:4958
clang::QualType::getObjCLifetime
Qualifiers::ObjCLifetime getObjCLifetime() const
Returns lifetime attribute of this type.
Definition: Type.h:1058
clang::ASTContext::NumImplicitDestructors
static unsigned NumImplicitDestructors
The number of implicitly-declared destructors.
Definition: ASTContext.h:2823
clang::LookupResult::isVisible
static bool isVisible(Sema &SemaRef, NamedDecl *D)
Determine whether the given declaration is visible to the program.
Definition: Lookup.h:338
clang::Sema::ActOnFriendFunctionDecl
NamedDecl * ActOnFriendFunctionDecl(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParams)
Definition: SemaDeclCXX.cpp:14262
clang::DeclContext::isTransparentContext
bool isTransparentContext() const
isTransparentContext - Determines whether this context is a "transparent" context, meaning that the members declared in this context are semantically declared in the nearest enclosing non-transparent (opaque) context but are lexically declared in this context.
Definition: DeclBase.cpp:1110
clang::FunctionProtoType::param_type_end
param_type_iterator param_type_end() const
Definition: Type.h:4038
clang::Sema::ActOnReenterTemplateScope
unsigned ActOnReenterTemplateScope(Scope *S, Decl *Template)
Definition: SemaDeclCXX.cpp:8010
DiagnoseNamespaceInlineMismatch
static void DiagnoseNamespaceInlineMismatch(Sema &S, SourceLocation KeywordLoc, SourceLocation Loc, IdentifierInfo *II, bool *IsInline, NamespaceDecl *PrevNS)
Diagnose a mismatch in &#39;inline&#39; qualifiers when a namespace is reopened.
Definition: SemaDeclCXX.cpp:8801
clang::Sema::ContextRAII
A RAII object to temporarily push a declaration context.
Definition: Sema.h:728
clang::CXXRecordDecl::methods
method_range methods() const
Definition: DeclCXX.h:865
TSK_Field
The subobject is a non-static data member.
Definition: SemaDeclCXX.cpp:7468
clang::VarDecl::isNoDestroy
bool isNoDestroy(const ASTContext &) const
Do we need to emit an exit-time destructor for this variable?
Definition: Decl.cpp:2480
clang::CXXBaseSpecifier::getType
QualType getType() const
Retrieves the type of the base class.
Definition: DeclCXX.h:291
clang::ASTContext::CompCategories
ComparisonCategories CompCategories
Types and expressions required to build C++2a three-way comparisons using operator<=>, including the values return by builtin <=> operators.
Definition: ASTContext.h:2026
clang::CXXRecordDecl::defaultedDestructorIsDeleted
bool defaultedDestructorIsDeleted() const
true if a defaulted destructor for this class would be deleted.
Definition: DeclCXX.h:929