clang 8.0.0

ParseCXXInlineMethods.cpp
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1 //===--- ParseCXXInlineMethods.cpp - C++ class inline methods parsing------===//
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 parsing for C++ class inline methods.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "clang/Parse/Parser.h"
15 #include "clang/AST/DeclTemplate.h"
16 #include "clang/Parse/ParseDiagnostic.h"
17 #include "clang/Parse/RAIIObjectsForParser.h"
18 #include "clang/Sema/DeclSpec.h"
19 #include "clang/Sema/Scope.h"
20 using namespace clang;
21
22 /// ParseCXXInlineMethodDef - We parsed and verified that the specified
23 /// Declarator is a well formed C++ inline method definition. Now lex its body
24 /// and store its tokens for parsing after the C++ class is complete.
25 NamedDecl *Parser::ParseCXXInlineMethodDef(
26 AccessSpecifier AS, ParsedAttributes &AccessAttrs, ParsingDeclarator &D,
27 const ParsedTemplateInfo &TemplateInfo, const VirtSpecifiers &VS,
28 SourceLocation PureSpecLoc) {
29 assert(D.isFunctionDeclarator() && "This isn't a function declarator!");
30 assert(Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try, tok::equal) &&
31 "Current token not a '{', ':', '=', or 'try'!");
32
33 MultiTemplateParamsArg TemplateParams(
34 TemplateInfo.TemplateParams ? TemplateInfo.TemplateParams->data()
35 : nullptr,
36 TemplateInfo.TemplateParams ? TemplateInfo.TemplateParams->size() : 0);
37
38 NamedDecl *FnD;
39 if (D.getDeclSpec().isFriendSpecified())
40 FnD = Actions.ActOnFriendFunctionDecl(getCurScope(), D,
41 TemplateParams);
42 else {
43 FnD = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS, D,
44 TemplateParams, nullptr,
45 VS, ICIS_NoInit);
46 if (FnD) {
47 Actions.ProcessDeclAttributeList(getCurScope(), FnD, AccessAttrs);
48 if (PureSpecLoc.isValid())
49 Actions.ActOnPureSpecifier(FnD, PureSpecLoc);
50 }
51 }
52
53 if (FnD)
54 HandleMemberFunctionDeclDelays(D, FnD);
55
56 D.complete(FnD);
57
58 if (TryConsumeToken(tok::equal)) {
59 if (!FnD) {
60 SkipUntil(tok::semi);
61 return nullptr;
62 }
63
64 bool Delete = false;
65 SourceLocation KWLoc;
66 SourceLocation KWEndLoc = Tok.getEndLoc().getLocWithOffset(-1);
67 if (TryConsumeToken(tok::kw_delete, KWLoc)) {
68 Diag(KWLoc, getLangOpts().CPlusPlus11
69 ? diag::warn_cxx98_compat_defaulted_deleted_function
70 : diag::ext_defaulted_deleted_function)
71 << 1 /* deleted */;
72 Actions.SetDeclDeleted(FnD, KWLoc);
73 Delete = true;
74 if (auto *DeclAsFunction = dyn_cast<FunctionDecl>(FnD)) {
75 DeclAsFunction->setRangeEnd(KWEndLoc);
76 }
77 } else if (TryConsumeToken(tok::kw_default, KWLoc)) {
78 Diag(KWLoc, getLangOpts().CPlusPlus11
79 ? diag::warn_cxx98_compat_defaulted_deleted_function
80 : diag::ext_defaulted_deleted_function)
81 << 0 /* defaulted */;
82 Actions.SetDeclDefaulted(FnD, KWLoc);
83 if (auto *DeclAsFunction = dyn_cast<FunctionDecl>(FnD)) {
84 DeclAsFunction->setRangeEnd(KWEndLoc);
85 }
86 } else {
87 llvm_unreachable("function definition after = not 'delete' or 'default'");
88 }
89
90 if (Tok.is(tok::comma)) {
91 Diag(KWLoc, diag::err_default_delete_in_multiple_declaration)
92 << Delete;
93 SkipUntil(tok::semi);
94 } else if (ExpectAndConsume(tok::semi, diag::err_expected_after,
95 Delete ? "delete" : "default")) {
96 SkipUntil(tok::semi);
97 }
98
99 return FnD;
100 }
101
102 if (SkipFunctionBodies && (!FnD || Actions.canSkipFunctionBody(FnD)) &&
103 trySkippingFunctionBody()) {
104 Actions.ActOnSkippedFunctionBody(FnD);
105 return FnD;
106 }
107
108 // In delayed template parsing mode, if we are within a class template
109 // or if we are about to parse function member template then consume
110 // the tokens and store them for parsing at the end of the translation unit.
111 if (getLangOpts().DelayedTemplateParsing &&
112 D.getFunctionDefinitionKind() == FDK_Definition &&
113 !D.getDeclSpec().isConstexprSpecified() &&
114 !(FnD && FnD->getAsFunction() &&
115 FnD->getAsFunction()->getReturnType()->getContainedAutoType()) &&
116 ((Actions.CurContext->isDependentContext() ||
117 (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
118 TemplateInfo.Kind != ParsedTemplateInfo::ExplicitSpecialization)) &&
119 !Actions.IsInsideALocalClassWithinATemplateFunction())) {
120
121 CachedTokens Toks;
122 LexTemplateFunctionForLateParsing(Toks);
123
124 if (FnD) {
125 FunctionDecl *FD = FnD->getAsFunction();
126 Actions.CheckForFunctionRedefinition(FD);
127 Actions.MarkAsLateParsedTemplate(FD, FnD, Toks);
128 }
129
130 return FnD;
131 }
132
133 // Consume the tokens and store them for later parsing.
134
135 LexedMethod* LM = new LexedMethod(this, FnD);
136 getCurrentClass().LateParsedDeclarations.push_back(LM);
137 LM->TemplateScope = getCurScope()->isTemplateParamScope();
138 CachedTokens &Toks = LM->Toks;
139
140 tok::TokenKind kind = Tok.getKind();
141 // Consume everything up to (and including) the left brace of the
142 // function body.
143 if (ConsumeAndStoreFunctionPrologue(Toks)) {
144 // We didn't find the left-brace we expected after the
145 // constructor initializer; we already printed an error, and it's likely
146 // impossible to recover, so don't try to parse this method later.
147 // Skip over the rest of the decl and back to somewhere that looks
148 // reasonable.
149 SkipMalformedDecl();
150 delete getCurrentClass().LateParsedDeclarations.back();
151 getCurrentClass().LateParsedDeclarations.pop_back();
152 return FnD;
153 } else {
154 // Consume everything up to (and including) the matching right brace.
155 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
156 }
157
158 // If we're in a function-try-block, we need to store all the catch blocks.
159 if (kind == tok::kw_try) {
160 while (Tok.is(tok::kw_catch)) {
161 ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false);
162 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
163 }
164 }
165
166 if (FnD) {
167 FunctionDecl *FD = FnD->getAsFunction();
168 // Track that this function will eventually have a body; Sema needs
169 // to know this.
170 Actions.CheckForFunctionRedefinition(FD);
171 FD->setWillHaveBody(true);
172 } else {
173 // If semantic analysis could not build a function declaration,
174 // just throw away the late-parsed declaration.
175 delete getCurrentClass().LateParsedDeclarations.back();
176 getCurrentClass().LateParsedDeclarations.pop_back();
177 }
178
179 return FnD;
180 }
181
182 /// ParseCXXNonStaticMemberInitializer - We parsed and verified that the
183 /// specified Declarator is a well formed C++ non-static data member
184 /// declaration. Now lex its initializer and store its tokens for parsing
185 /// after the class is complete.
186 void Parser::ParseCXXNonStaticMemberInitializer(Decl *VarD) {
187 assert(Tok.isOneOf(tok::l_brace, tok::equal) &&
188 "Current token not a '{' or '='!");
189
190 LateParsedMemberInitializer *MI =
191 new LateParsedMemberInitializer(this, VarD);
192 getCurrentClass().LateParsedDeclarations.push_back(MI);
193 CachedTokens &Toks = MI->Toks;
194
195 tok::TokenKind kind = Tok.getKind();
196 if (kind == tok::equal) {
197 Toks.push_back(Tok);
198 ConsumeToken();
199 }
200
201 if (kind == tok::l_brace) {
202 // Begin by storing the '{' token.
203 Toks.push_back(Tok);
204 ConsumeBrace();
205
206 // Consume everything up to (and including) the matching right brace.
207 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/true);
208 } else {
209 // Consume everything up to (but excluding) the comma or semicolon.
210 ConsumeAndStoreInitializer(Toks, CIK_DefaultInitializer);
211 }
212
213 // Store an artificial EOF token to ensure that we don't run off the end of
214 // the initializer when we come to parse it.
215 Token Eof;
216 Eof.startToken();
217 Eof.setKind(tok::eof);
218 Eof.setLocation(Tok.getLocation());
219 Eof.setEofData(VarD);
220 Toks.push_back(Eof);
221 }
222
223 Parser::LateParsedDeclaration::~LateParsedDeclaration() {}
224 void Parser::LateParsedDeclaration::ParseLexedMethodDeclarations() {}
225 void Parser::LateParsedDeclaration::ParseLexedMemberInitializers() {}
226 void Parser::LateParsedDeclaration::ParseLexedMethodDefs() {}
227
228 Parser::LateParsedClass::LateParsedClass(Parser *P, ParsingClass *C)
229 : Self(P), Class(C) {}
230
231 Parser::LateParsedClass::~LateParsedClass() {
232 Self->DeallocateParsedClasses(Class);
233 }
234
235 void Parser::LateParsedClass::ParseLexedMethodDeclarations() {
236 Self->ParseLexedMethodDeclarations(*Class);
237 }
238
239 void Parser::LateParsedClass::ParseLexedMemberInitializers() {
240 Self->ParseLexedMemberInitializers(*Class);
241 }
242
243 void Parser::LateParsedClass::ParseLexedMethodDefs() {
244 Self->ParseLexedMethodDefs(*Class);
245 }
246
247 void Parser::LateParsedMethodDeclaration::ParseLexedMethodDeclarations() {
248 Self->ParseLexedMethodDeclaration(*this);
249 }
250
251 void Parser::LexedMethod::ParseLexedMethodDefs() {
252 Self->ParseLexedMethodDef(*this);
253 }
254
255 void Parser::LateParsedMemberInitializer::ParseLexedMemberInitializers() {
256 Self->ParseLexedMemberInitializer(*this);
257 }
258
259 /// ParseLexedMethodDeclarations - We finished parsing the member
260 /// specification of a top (non-nested) C++ class. Now go over the
261 /// stack of method declarations with some parts for which parsing was
262 /// delayed (such as default arguments) and parse them.
263 void Parser::ParseLexedMethodDeclarations(ParsingClass &Class) {
264 bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
265 ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
266 HasTemplateScope);
267 TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
268 if (HasTemplateScope) {
269 Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
270 ++CurTemplateDepthTracker;
271 }
272
273 // The current scope is still active if we're the top-level class.
274 // Otherwise we'll need to push and enter a new scope.
275 bool HasClassScope = !Class.TopLevelClass;
276 ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope,
277 HasClassScope);
278 if (HasClassScope)
279 Actions.ActOnStartDelayedMemberDeclarations(getCurScope(),
280 Class.TagOrTemplate);
281
282 for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
283 Class.LateParsedDeclarations[i]->ParseLexedMethodDeclarations();
284 }
285
286 if (HasClassScope)
287 Actions.ActOnFinishDelayedMemberDeclarations(getCurScope(),
288 Class.TagOrTemplate);
289 }
290
291 void Parser::ParseLexedMethodDeclaration(LateParsedMethodDeclaration &LM) {
292 // If this is a member template, introduce the template parameter scope.
293 ParseScope TemplateScope(this, Scope::TemplateParamScope, LM.TemplateScope);
294 TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
295 if (LM.TemplateScope) {
296 Actions.ActOnReenterTemplateScope(getCurScope(), LM.Method);
297 ++CurTemplateDepthTracker;
298 }
299 // Start the delayed C++ method declaration
300 Actions.ActOnStartDelayedCXXMethodDeclaration(getCurScope(), LM.Method);
301
302 // Introduce the parameters into scope and parse their default
303 // arguments.
304 ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
305 Scope::FunctionDeclarationScope | Scope::DeclScope);
306 for (unsigned I = 0, N = LM.DefaultArgs.size(); I != N; ++I) {
307 auto Param = cast<ParmVarDecl>(LM.DefaultArgs[I].Param);
308 // Introduce the parameter into scope.
309 bool HasUnparsed = Param->hasUnparsedDefaultArg();
310 Actions.ActOnDelayedCXXMethodParameter(getCurScope(), Param);
311 std::unique_ptr<CachedTokens> Toks = std::move(LM.DefaultArgs[I].Toks);
312 if (Toks) {
313 ParenBraceBracketBalancer BalancerRAIIObj(*this);
314
315 // Mark the end of the default argument so that we know when to stop when
316 // we parse it later on.
317 Token LastDefaultArgToken = Toks->back();
318 Token DefArgEnd;
319 DefArgEnd.startToken();
320 DefArgEnd.setKind(tok::eof);
321 DefArgEnd.setLocation(LastDefaultArgToken.getEndLoc());
322 DefArgEnd.setEofData(Param);
323 Toks->push_back(DefArgEnd);
324
325 // Parse the default argument from its saved token stream.
326 Toks->push_back(Tok); // So that the current token doesn't get lost
327 PP.EnterTokenStream(*Toks, true);
328
329 // Consume the previously-pushed token.
330 ConsumeAnyToken();
331
332 // Consume the '='.
333 assert(Tok.is(tok::equal) && "Default argument not starting with '='");
334 SourceLocation EqualLoc = ConsumeToken();
335
336 // The argument isn't actually potentially evaluated unless it is
337 // used.
338 EnterExpressionEvaluationContext Eval(
339 Actions,
340 Sema::ExpressionEvaluationContext::PotentiallyEvaluatedIfUsed, Param);
341
342 ExprResult DefArgResult;
343 if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
344 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
345 DefArgResult = ParseBraceInitializer();
346 } else
347 DefArgResult = ParseAssignmentExpression();
348 DefArgResult = Actions.CorrectDelayedTyposInExpr(DefArgResult);
349 if (DefArgResult.isInvalid()) {
350 Actions.ActOnParamDefaultArgumentError(Param, EqualLoc);
351 } else {
352 if (Tok.isNot(tok::eof) || Tok.getEofData() != Param) {
353 // The last two tokens are the terminator and the saved value of
354 // Tok; the last token in the default argument is the one before
355 // those.
356 assert(Toks->size() >= 3 && "expected a token in default arg");
357 Diag(Tok.getLocation(), diag::err_default_arg_unparsed)
358 << SourceRange(Tok.getLocation(),
359 (*Toks)[Toks->size() - 3].getLocation());
360 }
361 Actions.ActOnParamDefaultArgument(Param, EqualLoc,
362 DefArgResult.get());
363 }
364
365 // There could be leftover tokens (e.g. because of an error).
366 // Skip through until we reach the 'end of default argument' token.
367 while (Tok.isNot(tok::eof))
368 ConsumeAnyToken();
369
370 if (Tok.is(tok::eof) && Tok.getEofData() == Param)
371 ConsumeAnyToken();
372 } else if (HasUnparsed) {
373 assert(Param->hasInheritedDefaultArg());
374 FunctionDecl *Old = cast<FunctionDecl>(LM.Method)->getPreviousDecl();
375 ParmVarDecl *OldParam = Old->getParamDecl(I);
376 assert (!OldParam->hasUnparsedDefaultArg());
377 if (OldParam->hasUninstantiatedDefaultArg())
378 Param->setUninstantiatedDefaultArg(
379 OldParam->getUninstantiatedDefaultArg());
380 else
381 Param->setDefaultArg(OldParam->getInit());
382 }
383 }
384
385 // Parse a delayed exception-specification, if there is one.
386 if (CachedTokens *Toks = LM.ExceptionSpecTokens) {
387 ParenBraceBracketBalancer BalancerRAIIObj(*this);
388
389 // Add the 'stop' token.
390 Token LastExceptionSpecToken = Toks->back();
391 Token ExceptionSpecEnd;
392 ExceptionSpecEnd.startToken();
393 ExceptionSpecEnd.setKind(tok::eof);
394 ExceptionSpecEnd.setLocation(LastExceptionSpecToken.getEndLoc());
395 ExceptionSpecEnd.setEofData(LM.Method);
396 Toks->push_back(ExceptionSpecEnd);
397
398 // Parse the default argument from its saved token stream.
399 Toks->push_back(Tok); // So that the current token doesn't get lost
400 PP.EnterTokenStream(*Toks, true);
401
402 // Consume the previously-pushed token.
403 ConsumeAnyToken();
404
405 // C++11 [expr.prim.general]p3:
406 // If a declaration declares a member function or member function
407 // template of a class X, the expression this is a prvalue of type
408 // "pointer to cv-qualifier-seq X" between the optional cv-qualifer-seq
409 // and the end of the function-definition, member-declarator, or
410 // declarator.
411 CXXMethodDecl *Method;
412 if (FunctionTemplateDecl *FunTmpl
413 = dyn_cast<FunctionTemplateDecl>(LM.Method))
414 Method = cast<CXXMethodDecl>(FunTmpl->getTemplatedDecl());
415 else
416 Method = cast<CXXMethodDecl>(LM.Method);
417
418 Sema::CXXThisScopeRAII ThisScope(Actions, Method->getParent(),
419 Method->getTypeQualifiers(),
420 getLangOpts().CPlusPlus11);
421
422 // Parse the exception-specification.
423 SourceRange SpecificationRange;
424 SmallVector<ParsedType, 4> DynamicExceptions;
425 SmallVector<SourceRange, 4> DynamicExceptionRanges;
426 ExprResult NoexceptExpr;
427 CachedTokens *ExceptionSpecTokens;
428
429 ExceptionSpecificationType EST
430 = tryParseExceptionSpecification(/*Delayed=*/false, SpecificationRange,
431 DynamicExceptions,
432 DynamicExceptionRanges, NoexceptExpr,
433 ExceptionSpecTokens);
434
435 if (Tok.isNot(tok::eof) || Tok.getEofData() != LM.Method)
436 Diag(Tok.getLocation(), diag::err_except_spec_unparsed);
437
438 // Attach the exception-specification to the method.
439 Actions.actOnDelayedExceptionSpecification(LM.Method, EST,
440 SpecificationRange,
441 DynamicExceptions,
442 DynamicExceptionRanges,
443 NoexceptExpr.isUsable()?
444 NoexceptExpr.get() : nullptr);
445
446 // There could be leftover tokens (e.g. because of an error).
447 // Skip through until we reach the original token position.
448 while (Tok.isNot(tok::eof))
449 ConsumeAnyToken();
450
451 // Clean up the remaining EOF token.
452 if (Tok.is(tok::eof) && Tok.getEofData() == LM.Method)
453 ConsumeAnyToken();
454
455 delete Toks;
456 LM.ExceptionSpecTokens = nullptr;
457 }
458
459 PrototypeScope.Exit();
460
461 // Finish the delayed C++ method declaration.
462 Actions.ActOnFinishDelayedCXXMethodDeclaration(getCurScope(), LM.Method);
463 }
464
465 /// ParseLexedMethodDefs - We finished parsing the member specification of a top
466 /// (non-nested) C++ class. Now go over the stack of lexed methods that were
467 /// collected during its parsing and parse them all.
468 void Parser::ParseLexedMethodDefs(ParsingClass &Class) {
469 bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
470 ParseScope ClassTemplateScope(this, Scope::TemplateParamScope, HasTemplateScope);
471 TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
472 if (HasTemplateScope) {
473 Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
474 ++CurTemplateDepthTracker;
475 }
476 bool HasClassScope = !Class.TopLevelClass;
477 ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope,
478 HasClassScope);
479
480 for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
481 Class.LateParsedDeclarations[i]->ParseLexedMethodDefs();
482 }
483 }
484
485 void Parser::ParseLexedMethodDef(LexedMethod &LM) {
486 // If this is a member template, introduce the template parameter scope.
487 ParseScope TemplateScope(this, Scope::TemplateParamScope, LM.TemplateScope);
488 TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
489 if (LM.TemplateScope) {
490 Actions.ActOnReenterTemplateScope(getCurScope(), LM.D);
491 ++CurTemplateDepthTracker;
492 }
493
494 ParenBraceBracketBalancer BalancerRAIIObj(*this);
495
496 assert(!LM.Toks.empty() && "Empty body!");
497 Token LastBodyToken = LM.Toks.back();
498 Token BodyEnd;
499 BodyEnd.startToken();
500 BodyEnd.setKind(tok::eof);
501 BodyEnd.setLocation(LastBodyToken.getEndLoc());
502 BodyEnd.setEofData(LM.D);
503 LM.Toks.push_back(BodyEnd);
504 // Append the current token at the end of the new token stream so that it
505 // doesn't get lost.
506 LM.Toks.push_back(Tok);
507 PP.EnterTokenStream(LM.Toks, true);
508
509 // Consume the previously pushed token.
510 ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
511 assert(Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try)
512 && "Inline method not starting with '{', ':' or 'try'");
513
514 // Parse the method body. Function body parsing code is similar enough
515 // to be re-used for method bodies as well.
516 ParseScope FnScope(this, Scope::FnScope | Scope::DeclScope |
517 Scope::CompoundStmtScope);
518 Actions.ActOnStartOfFunctionDef(getCurScope(), LM.D);
519
520 if (Tok.is(tok::kw_try)) {
521 ParseFunctionTryBlock(LM.D, FnScope);
522
523 while (Tok.isNot(tok::eof))
524 ConsumeAnyToken();
525
526 if (Tok.is(tok::eof) && Tok.getEofData() == LM.D)
527 ConsumeAnyToken();
528 return;
529 }
530 if (Tok.is(tok::colon)) {
531 ParseConstructorInitializer(LM.D);
532
533 // Error recovery.
534 if (!Tok.is(tok::l_brace)) {
535 FnScope.Exit();
536 Actions.ActOnFinishFunctionBody(LM.D, nullptr);
537
538 while (Tok.isNot(tok::eof))
539 ConsumeAnyToken();
540
541 if (Tok.is(tok::eof) && Tok.getEofData() == LM.D)
542 ConsumeAnyToken();
543 return;
544 }
545 } else
546 Actions.ActOnDefaultCtorInitializers(LM.D);
547
548 assert((Actions.getDiagnostics().hasErrorOccurred() ||
549 !isa<FunctionTemplateDecl>(LM.D) ||
550 cast<FunctionTemplateDecl>(LM.D)->getTemplateParameters()->getDepth()
551 < TemplateParameterDepth) &&
552 "TemplateParameterDepth should be greater than the depth of "
553 "current template being instantiated!");
554
555 ParseFunctionStatementBody(LM.D, FnScope);
556
557 while (Tok.isNot(tok::eof))
558 ConsumeAnyToken();
559
560 if (Tok.is(tok::eof) && Tok.getEofData() == LM.D)
561 ConsumeAnyToken();
562
563 if (auto *FD = dyn_cast_or_null<FunctionDecl>(LM.D))
564 if (isa<CXXMethodDecl>(FD) ||
565 FD->isInIdentifierNamespace(Decl::IDNS_OrdinaryFriend))
566 Actions.ActOnFinishInlineFunctionDef(FD);
567 }
568
569 /// ParseLexedMemberInitializers - We finished parsing the member specification
570 /// of a top (non-nested) C++ class. Now go over the stack of lexed data member
571 /// initializers that were collected during its parsing and parse them all.
572 void Parser::ParseLexedMemberInitializers(ParsingClass &Class) {
573 bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
574 ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
575 HasTemplateScope);
576 TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
577 if (HasTemplateScope) {
578 Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
579 ++CurTemplateDepthTracker;
580 }
581 // Set or update the scope flags.
582 bool AlreadyHasClassScope = Class.TopLevelClass;
583 unsigned ScopeFlags = Scope::ClassScope|Scope::DeclScope;
584 ParseScope ClassScope(this, ScopeFlags, !AlreadyHasClassScope);
585 ParseScopeFlags ClassScopeFlags(this, ScopeFlags, AlreadyHasClassScope);
586
587 if (!AlreadyHasClassScope)
588 Actions.ActOnStartDelayedMemberDeclarations(getCurScope(),
589 Class.TagOrTemplate);
590
591 if (!Class.LateParsedDeclarations.empty()) {
592 // C++11 [expr.prim.general]p4:
593 // Otherwise, if a member-declarator declares a non-static data member
594 // (9.2) of a class X, the expression this is a prvalue of type "pointer
595 // to X" within the optional brace-or-equal-initializer. It shall not
596 // appear elsewhere in the member-declarator.
597 Sema::CXXThisScopeRAII ThisScope(Actions, Class.TagOrTemplate,
598 Qualifiers());
599
600 for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
601 Class.LateParsedDeclarations[i]->ParseLexedMemberInitializers();
602 }
603 }
604
605 if (!AlreadyHasClassScope)
606 Actions.ActOnFinishDelayedMemberDeclarations(getCurScope(),
607 Class.TagOrTemplate);
608
609 Actions.ActOnFinishDelayedMemberInitializers(Class.TagOrTemplate);
610 }
611
612 void Parser::ParseLexedMemberInitializer(LateParsedMemberInitializer &MI) {
613 if (!MI.Field || MI.Field->isInvalidDecl())
614 return;
615
616 ParenBraceBracketBalancer BalancerRAIIObj(*this);
617
618 // Append the current token at the end of the new token stream so that it
619 // doesn't get lost.
620 MI.Toks.push_back(Tok);
621 PP.EnterTokenStream(MI.Toks, true);
622
623 // Consume the previously pushed token.
624 ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
625
626 SourceLocation EqualLoc;
627
628 Actions.ActOnStartCXXInClassMemberInitializer();
629
630 ExprResult Init = ParseCXXMemberInitializer(MI.Field, /*IsFunction=*/false,
631 EqualLoc);
632
633 Actions.ActOnFinishCXXInClassMemberInitializer(MI.Field, EqualLoc,
634 Init.get());
635
636 // The next token should be our artificial terminating EOF token.
637 if (Tok.isNot(tok::eof)) {
638 if (!Init.isInvalid()) {
639 SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation);
640 if (!EndLoc.isValid())
641 EndLoc = Tok.getLocation();
642 // No fixit; we can't recover as if there were a semicolon here.
643 Diag(EndLoc, diag::err_expected_semi_decl_list);
644 }
645
646 // Consume tokens until we hit the artificial EOF.
647 while (Tok.isNot(tok::eof))
648 ConsumeAnyToken();
649 }
650 // Make sure this is *our* artificial EOF token.
651 if (Tok.getEofData() == MI.Field)
652 ConsumeAnyToken();
653 }
654
655 /// ConsumeAndStoreUntil - Consume and store the token at the passed token
656 /// container until the token 'T' is reached (which gets
657 /// consumed/stored too, if ConsumeFinalToken).
658 /// If StopAtSemi is true, then we will stop early at a ';' character.
659 /// Returns true if token 'T1' or 'T2' was found.
660 /// NOTE: This is a specialized version of Parser::SkipUntil.
661 bool Parser::ConsumeAndStoreUntil(tok::TokenKind T1, tok::TokenKind T2,
662 CachedTokens &Toks,
663 bool StopAtSemi, bool ConsumeFinalToken) {
664 // We always want this function to consume at least one token if the first
665 // token isn't T and if not at EOF.
666 bool isFirstTokenConsumed = true;
667 while (1) {
668 // If we found one of the tokens, stop and return true.
669 if (Tok.is(T1) || Tok.is(T2)) {
670 if (ConsumeFinalToken) {
671 Toks.push_back(Tok);
672 ConsumeAnyToken();
673 }
674 return true;
675 }
676
677 switch (Tok.getKind()) {
678 case tok::eof:
679 case tok::annot_module_begin:
680 case tok::annot_module_end:
681 case tok::annot_module_include:
682 // Ran out of tokens.
683 return false;
684
685 case tok::l_paren:
686 // Recursively consume properly-nested parens.
687 Toks.push_back(Tok);
688 ConsumeParen();
689 ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false);
690 break;
691 case tok::l_square:
692 // Recursively consume properly-nested square brackets.
693 Toks.push_back(Tok);
694 ConsumeBracket();
695 ConsumeAndStoreUntil(tok::r_square, Toks, /*StopAtSemi=*/false);
696 break;
697 case tok::l_brace:
698 // Recursively consume properly-nested braces.
699 Toks.push_back(Tok);
700 ConsumeBrace();
701 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
702 break;
703
704 // Okay, we found a ']' or '}' or ')', which we think should be balanced.
705 // Since the user wasn't looking for this token (if they were, it would
706 // already be handled), this isn't balanced. If there is a LHS token at a
707 // higher level, we will assume that this matches the unbalanced token
708 // and return it. Otherwise, this is a spurious RHS token, which we skip.
709 case tok::r_paren:
710 if (ParenCount && !isFirstTokenConsumed)
711 return false; // Matches something.
712 Toks.push_back(Tok);
713 ConsumeParen();
714 break;
715 case tok::r_square:
716 if (BracketCount && !isFirstTokenConsumed)
717 return false; // Matches something.
718 Toks.push_back(Tok);
719 ConsumeBracket();
720 break;
721 case tok::r_brace:
722 if (BraceCount && !isFirstTokenConsumed)
723 return false; // Matches something.
724 Toks.push_back(Tok);
725 ConsumeBrace();
726 break;
727
728 case tok::semi:
729 if (StopAtSemi)
730 return false;
731 LLVM_FALLTHROUGH;
732 default:
733 // consume this token.
734 Toks.push_back(Tok);
735 ConsumeAnyToken(/*ConsumeCodeCompletionTok*/true);
736 break;
737 }
738 isFirstTokenConsumed = false;
739 }
740 }
741
742 /// Consume tokens and store them in the passed token container until
743 /// we've passed the try keyword and constructor initializers and have consumed
744 /// the opening brace of the function body. The opening brace will be consumed
745 /// if and only if there was no error.
746 ///
747 /// \return True on error.
748 bool Parser::ConsumeAndStoreFunctionPrologue(CachedTokens &Toks) {
749 if (Tok.is(tok::kw_try)) {
750 Toks.push_back(Tok);
751 ConsumeToken();
752 }
753
754 if (Tok.isNot(tok::colon)) {
755 // Easy case, just a function body.
756
757 // Grab any remaining garbage to be diagnosed later. We stop when we reach a
758 // brace: an opening one is the function body, while a closing one probably
759 // means we've reached the end of the class.
760 ConsumeAndStoreUntil(tok::l_brace, tok::r_brace, Toks,
761 /*StopAtSemi=*/true,
762 /*ConsumeFinalToken=*/false);
763 if (Tok.isNot(tok::l_brace))
764 return Diag(Tok.getLocation(), diag::err_expected) << tok::l_brace;
765
766 Toks.push_back(Tok);
767 ConsumeBrace();
768 return false;
769 }
770
771 Toks.push_back(Tok);
772 ConsumeToken();
773
774 // We can't reliably skip over a mem-initializer-id, because it could be
775 // a template-id involving not-yet-declared names. Given:
776 //
777 // S ( ) : a < b < c > ( e )
778 //
779 // 'e' might be an initializer or part of a template argument, depending
780 // on whether 'b' is a template.
781
782 // Track whether we might be inside a template argument. We can give
783 // significantly better diagnostics if we know that we're not.
784 bool MightBeTemplateArgument = false;
785
786 while (true) {
787 // Skip over the mem-initializer-id, if possible.
788 if (Tok.is(tok::kw_decltype)) {
789 Toks.push_back(Tok);
790 SourceLocation OpenLoc = ConsumeToken();
791 if (Tok.isNot(tok::l_paren))
792 return Diag(Tok.getLocation(), diag::err_expected_lparen_after)
793 << "decltype";
794 Toks.push_back(Tok);
795 ConsumeParen();
796 if (!ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/true)) {
797 Diag(Tok.getLocation(), diag::err_expected) << tok::r_paren;
798 Diag(OpenLoc, diag::note_matching) << tok::l_paren;
799 return true;
800 }
801 }
802 do {
803 // Walk over a component of a nested-name-specifier.
804 if (Tok.is(tok::coloncolon)) {
805 Toks.push_back(Tok);
806 ConsumeToken();
807
808 if (Tok.is(tok::kw_template)) {
809 Toks.push_back(Tok);
810 ConsumeToken();
811 }
812 }
813
814 if (Tok.is(tok::identifier)) {
815 Toks.push_back(Tok);
816 ConsumeToken();
817 } else {
818 break;
819 }
820 } while (Tok.is(tok::coloncolon));
821
822 if (Tok.is(tok::code_completion)) {
823 Toks.push_back(Tok);
824 ConsumeCodeCompletionToken();
825 if (Tok.isOneOf(tok::identifier, tok::coloncolon, tok::kw_decltype)) {
826 // Could be the start of another member initializer (the ',' has not
827 // been written yet)
828 continue;
829 }
830 }
831
832 if (Tok.is(tok::comma)) {
833 // The initialization is missing, we'll diagnose it later.
834 Toks.push_back(Tok);
835 ConsumeToken();
836 continue;
837 }
838 if (Tok.is(tok::less))
839 MightBeTemplateArgument = true;
840
841 if (MightBeTemplateArgument) {
842 // We may be inside a template argument list. Grab up to the start of the
843 // next parenthesized initializer or braced-init-list. This *might* be the
844 // initializer, or it might be a subexpression in the template argument
845 // list.
846 // FIXME: Count angle brackets, and clear MightBeTemplateArgument
847 // if all angles are closed.
848 if (!ConsumeAndStoreUntil(tok::l_paren, tok::l_brace, Toks,
849 /*StopAtSemi=*/true,
850 /*ConsumeFinalToken=*/false)) {
851 // We're not just missing the initializer, we're also missing the
852 // function body!
853 return Diag(Tok.getLocation(), diag::err_expected) << tok::l_brace;
854 }
855 } else if (Tok.isNot(tok::l_paren) && Tok.isNot(tok::l_brace)) {
856 // We found something weird in a mem-initializer-id.
857 if (getLangOpts().CPlusPlus11)
858 return Diag(Tok.getLocation(), diag::err_expected_either)
859 << tok::l_paren << tok::l_brace;
860 else
861 return Diag(Tok.getLocation(), diag::err_expected) << tok::l_paren;
862 }
863
864 tok::TokenKind kind = Tok.getKind();
865 Toks.push_back(Tok);
866 bool IsLParen = (kind == tok::l_paren);
867 SourceLocation OpenLoc = Tok.getLocation();
868
869 if (IsLParen) {
870 ConsumeParen();
871 } else {
872 assert(kind == tok::l_brace && "Must be left paren or brace here.");
873 ConsumeBrace();
874 // In C++03, this has to be the start of the function body, which
875 // means the initializer is malformed; we'll diagnose it later.
876 if (!getLangOpts().CPlusPlus11)
877 return false;
878
879 const Token &PreviousToken = Toks[Toks.size() - 2];
880 if (!MightBeTemplateArgument &&
881 !PreviousToken.isOneOf(tok::identifier, tok::greater,
882 tok::greatergreater)) {
883 // If the opening brace is not preceded by one of these tokens, we are
884 // missing the mem-initializer-id. In order to recover better, we need
885 // to use heuristics to determine if this '{' is most likely the
886 // beginning of a brace-init-list or the function body.
887 // Check the token after the corresponding '}'.
888 TentativeParsingAction PA(*this);
889 if (SkipUntil(tok::r_brace) &&
890 !Tok.isOneOf(tok::comma, tok::ellipsis, tok::l_brace)) {
891 // Consider there was a malformed initializer and this is the start
892 // of the function body. We'll diagnose it later.
893 PA.Revert();
894 return false;
895 }
896 PA.Revert();
897 }
898 }
899
900 // Grab the initializer (or the subexpression of the template argument).
901 // FIXME: If we support lambdas here, we'll need to set StopAtSemi to false
902 // if we might be inside the braces of a lambda-expression.
903 tok::TokenKind CloseKind = IsLParen ? tok::r_paren : tok::r_brace;
904 if (!ConsumeAndStoreUntil(CloseKind, Toks, /*StopAtSemi=*/true)) {
905 Diag(Tok, diag::err_expected) << CloseKind;
906 Diag(OpenLoc, diag::note_matching) << kind;
907 return true;
908 }
909
910 // Grab pack ellipsis, if present.
911 if (Tok.is(tok::ellipsis)) {
912 Toks.push_back(Tok);
913 ConsumeToken();
914 }
915
916 // If we know we just consumed a mem-initializer, we must have ',' or '{'
917 // next.
918 if (Tok.is(tok::comma)) {
919 Toks.push_back(Tok);
920 ConsumeToken();
921 } else if (Tok.is(tok::l_brace)) {
922 // This is the function body if the ')' or '}' is immediately followed by
923 // a '{'. That cannot happen within a template argument, apart from the
924 // case where a template argument contains a compound literal:
925 //
926 // S ( ) : a < b < c > ( d ) { }
927 // // End of declaration, or still inside the template argument?
928 //
929 // ... and the case where the template argument contains a lambda:
930 //
931 // S ( ) : a < 0 && b < c > ( d ) + [ ] ( ) { return 0; }
932 // ( ) > ( ) { }
933 //
934 // FIXME: Disambiguate these cases. Note that the latter case is probably
935 // going to be made ill-formed by core issue 1607.
936 Toks.push_back(Tok);
937 ConsumeBrace();
938 return false;
939 } else if (!MightBeTemplateArgument) {
940 return Diag(Tok.getLocation(), diag::err_expected_either) << tok::l_brace
941 << tok::comma;
942 }
943 }
944 }
945
946 /// Consume and store tokens from the '?' to the ':' in a conditional
947 /// expression.
948 bool Parser::ConsumeAndStoreConditional(CachedTokens &Toks) {
949 // Consume '?'.
950 assert(Tok.is(tok::question));
951 Toks.push_back(Tok);
952 ConsumeToken();
953
954 while (Tok.isNot(tok::colon)) {
955 if (!ConsumeAndStoreUntil(tok::question, tok::colon, Toks,
956 /*StopAtSemi=*/true,
957 /*ConsumeFinalToken=*/false))
958 return false;
959
960 // If we found a nested conditional, consume it.
961 if (Tok.is(tok::question) && !ConsumeAndStoreConditional(Toks))
962 return false;
963 }
964
965 // Consume ':'.
966 Toks.push_back(Tok);
967 ConsumeToken();
968 return true;
969 }
970
971 /// A tentative parsing action that can also revert token annotations.
972 class Parser::UnannotatedTentativeParsingAction : public TentativeParsingAction {
973 public:
974 explicit UnannotatedTentativeParsingAction(Parser &Self,
975 tok::TokenKind EndKind)
976 : TentativeParsingAction(Self), Self(Self), EndKind(EndKind) {
977 // Stash away the old token stream, so we can restore it once the
978 // tentative parse is complete.
979 TentativeParsingAction Inner(Self);
980 Self.ConsumeAndStoreUntil(EndKind, Toks, true, /*ConsumeFinalToken*/false);
981 Inner.Revert();
982 }
983
984 void RevertAnnotations() {
985 Revert();
986
987 // Put back the original tokens.
988 Self.SkipUntil(EndKind, StopAtSemi | StopBeforeMatch);
989 if (Toks.size()) {
990 auto Buffer = llvm::make_unique<Token[]>(Toks.size());
991 std::copy(Toks.begin() + 1, Toks.end(), Buffer.get());
992 Buffer[Toks.size() - 1] = Self.Tok;
993 Self.PP.EnterTokenStream(std::move(Buffer), Toks.size(), true);
994
995 Self.Tok = Toks.front();
996 }
997 }
998
999 private:
1000 Parser &Self;
1001 CachedTokens Toks;
1002 tok::TokenKind EndKind;
1003 };
1004
1005 /// ConsumeAndStoreInitializer - Consume and store the token at the passed token
1006 /// container until the end of the current initializer expression (either a
1007 /// default argument or an in-class initializer for a non-static data member).
1008 ///
1009 /// Returns \c true if we reached the end of something initializer-shaped,
1010 /// \c false if we bailed out.
1011 bool Parser::ConsumeAndStoreInitializer(CachedTokens &Toks,
1012 CachedInitKind CIK) {
1013 // We always want this function to consume at least one token if not at EOF.
1014 bool IsFirstToken = true;
1015
1016 // Number of possible unclosed <s we've seen so far. These might be templates,
1017 // and might not, but if there were none of them (or we know for sure that
1018 // we're within a template), we can avoid a tentative parse.
1019 unsigned AngleCount = 0;
1020 unsigned KnownTemplateCount = 0;
1021
1022 while (1) {
1023 switch (Tok.getKind()) {
1024 case tok::comma:
1025 // If we might be in a template, perform a tentative parse to check.
1026 if (!AngleCount)
1027 // Not a template argument: this is the end of the initializer.
1028 return true;
1029 if (KnownTemplateCount)
1030 goto consume_token;
1031
1032 // We hit a comma inside angle brackets. This is the hard case. The
1033 // rule we follow is:
1034 // * For a default argument, if the tokens after the comma form a
1035 // syntactically-valid parameter-declaration-clause, in which each
1036 // parameter has an initializer, then this comma ends the default
1037 // argument.
1038 // * For a default initializer, if the tokens after the comma form a
1039 // syntactically-valid init-declarator-list, then this comma ends
1040 // the default initializer.
1041 {
1042 UnannotatedTentativeParsingAction PA(*this,
1043 CIK == CIK_DefaultInitializer
1044 ? tok::semi : tok::r_paren);
1045 Sema::TentativeAnalysisScope Scope(Actions);
1046
1047 TPResult Result = TPResult::Error;
1048 ConsumeToken();
1049 switch (CIK) {
1050 case CIK_DefaultInitializer:
1051 Result = TryParseInitDeclaratorList();
1052 // If we parsed a complete, ambiguous init-declarator-list, this
1053 // is only syntactically-valid if it's followed by a semicolon.
1054 if (Result == TPResult::Ambiguous && Tok.isNot(tok::semi))
1055 Result = TPResult::False;
1056 break;
1057
1058 case CIK_DefaultArgument:
1059 bool InvalidAsDeclaration = false;
1060 Result = TryParseParameterDeclarationClause(
1061 &InvalidAsDeclaration, /*VersusTemplateArgument=*/true);
1062 // If this is an expression or a declaration with a missing
1063 // 'typename', assume it's not a declaration.
1064 if (Result == TPResult::Ambiguous && InvalidAsDeclaration)
1065 Result = TPResult::False;
1066 break;
1067 }
1068
1069 // If what follows could be a declaration, it is a declaration.
1070 if (Result != TPResult::False && Result != TPResult::Error) {
1071 PA.Revert();
1072 return true;
1073 }
1074
1075 // In the uncommon case that we decide the following tokens are part
1076 // of a template argument, revert any annotations we've performed in
1077 // those tokens. We're not going to look them up until we've parsed
1078 // the rest of the class, and that might add more declarations.
1079 PA.RevertAnnotations();
1080 }
1081
1082 // Keep going. We know we're inside a template argument list now.
1083 ++KnownTemplateCount;
1084 goto consume_token;
1085
1086 case tok::eof:
1087 case tok::annot_module_begin:
1088 case tok::annot_module_end:
1089 case tok::annot_module_include:
1090 // Ran out of tokens.
1091 return false;
1092
1093 case tok::less:
1094 // FIXME: A '<' can only start a template-id if it's preceded by an
1095 // identifier, an operator-function-id, or a literal-operator-id.
1096 ++AngleCount;
1097 goto consume_token;
1098
1099 case tok::question:
1100 // In 'a ? b : c', 'b' can contain an unparenthesized comma. If it does,
1101 // that is *never* the end of the initializer. Skip to the ':'.
1102 if (!ConsumeAndStoreConditional(Toks))
1103 return false;
1104 break;
1105
1106 case tok::greatergreatergreater:
1107 if (!getLangOpts().CPlusPlus11)
1108 goto consume_token;
1109 if (AngleCount) --AngleCount;
1110 if (KnownTemplateCount) --KnownTemplateCount;
1111 LLVM_FALLTHROUGH;
1112 case tok::greatergreater:
1113 if (!getLangOpts().CPlusPlus11)
1114 goto consume_token;
1115 if (AngleCount) --AngleCount;
1116 if (KnownTemplateCount) --KnownTemplateCount;
1117 LLVM_FALLTHROUGH;
1118 case tok::greater:
1119 if (AngleCount) --AngleCount;
1120 if (KnownTemplateCount) --KnownTemplateCount;
1121 goto consume_token;
1122
1123 case tok::kw_template:
1124 // 'template' identifier '<' is known to start a template argument list,
1125 // and can be used to disambiguate the parse.
1126 // FIXME: Support all forms of 'template' unqualified-id '<'.
1127 Toks.push_back(Tok);
1128 ConsumeToken();
1129 if (Tok.is(tok::identifier)) {
1130 Toks.push_back(Tok);
1131 ConsumeToken();
1132 if (Tok.is(tok::less)) {
1133 ++AngleCount;
1134 ++KnownTemplateCount;
1135 Toks.push_back(Tok);
1136 ConsumeToken();
1137 }
1138 }
1139 break;
1140
1141 case tok::kw_operator:
1142 // If 'operator' precedes other punctuation, that punctuation loses
1143 // its special behavior.
1144 Toks.push_back(Tok);
1145 ConsumeToken();
1146 switch (Tok.getKind()) {
1147 case tok::comma:
1148 case tok::greatergreatergreater:
1149 case tok::greatergreater:
1150 case tok::greater:
1151 case tok::less:
1152 Toks.push_back(Tok);
1153 ConsumeToken();
1154 break;
1155 default:
1156 break;
1157 }
1158 break;
1159
1160 case tok::l_paren:
1161 // Recursively consume properly-nested parens.
1162 Toks.push_back(Tok);
1163 ConsumeParen();
1164 ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false);
1165 break;
1166 case tok::l_square:
1167 // Recursively consume properly-nested square brackets.
1168 Toks.push_back(Tok);
1169 ConsumeBracket();
1170 ConsumeAndStoreUntil(tok::r_square, Toks, /*StopAtSemi=*/false);
1171 break;
1172 case tok::l_brace:
1173 // Recursively consume properly-nested braces.
1174 Toks.push_back(Tok);
1175 ConsumeBrace();
1176 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
1177 break;
1178
1179 // Okay, we found a ']' or '}' or ')', which we think should be balanced.
1180 // Since the user wasn't looking for this token (if they were, it would
1181 // already be handled), this isn't balanced. If there is a LHS token at a
1182 // higher level, we will assume that this matches the unbalanced token
1183 // and return it. Otherwise, this is a spurious RHS token, which we
1184 // consume and pass on to downstream code to diagnose.
1185 case tok::r_paren:
1186 if (CIK == CIK_DefaultArgument)
1187 return true; // End of the default argument.
1188 if (ParenCount && !IsFirstToken)
1189 return false;
1190 Toks.push_back(Tok);
1191 ConsumeParen();
1192 continue;
1193 case tok::r_square:
1194 if (BracketCount && !IsFirstToken)
1195 return false;
1196 Toks.push_back(Tok);
1197 ConsumeBracket();
1198 continue;
1199 case tok::r_brace:
1200 if (BraceCount && !IsFirstToken)
1201 return false;
1202 Toks.push_back(Tok);
1203 ConsumeBrace();
1204 continue;
1205
1206 case tok::code_completion:
1207 Toks.push_back(Tok);
1208 ConsumeCodeCompletionToken();
1209 break;
1210
1211 case tok::string_literal:
1212 case tok::wide_string_literal:
1213 case tok::utf8_string_literal:
1214 case tok::utf16_string_literal:
1215 case tok::utf32_string_literal:
1216 Toks.push_back(Tok);
1217 ConsumeStringToken();
1218 break;
1219 case tok::semi:
1220 if (CIK == CIK_DefaultInitializer)
1221 return true; // End of the default initializer.
1222 LLVM_FALLTHROUGH;
1223 default:
1224 consume_token:
1225 Toks.push_back(Tok);
1226 ConsumeToken();
1227 break;
1228 }
1229 IsFirstToken = false;
1230 }
1231 }
clang::Sema::ActOnFinishDelayedMemberInitializers
void ActOnFinishDelayedMemberInitializers(Decl *Record)
Definition: SemaDeclCXX.cpp:11036
clang::FunctionDecl
Represents a function declaration or definition.
Definition: Decl.h:1738
clang::DiagnosticsEngine::hasErrorOccurred
bool hasErrorOccurred() const
Definition: Diagnostic.h:747
clang::SourceLocation::getLocWithOffset
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
Definition: SourceLocation.h:134
clang::Scope::FunctionPrototypeScope
This is a scope that corresponds to the parameters within a function prototype.
Definition: Scope.h:82
Parser.h
clang::Token::is
bool is(tok::TokenKind K) const
is/isNot - Predicates to check if this token is a specific kind, as in "if (Tok.is(tok::l_brace)) {...
Definition: Token.h:95
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::Decl
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
clang::Sema::ProcessDeclAttributeList
void ProcessDeclAttributeList(Scope *S, Decl *D, const ParsedAttributesView &AL, bool IncludeCXX11Attributes=true)
DeclTemplate.h
Defines the C++ template declaration subclasses.
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::Scope::FnScope
This indicates that the scope corresponds to a function, which means that labels are set here...
Definition: Scope.h:48
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::isFunctionDeclarator
bool isFunctionDeclarator(unsigned &idx) const
isFunctionDeclarator - This method returns true if the declarator is a function declarator (looking t...
Definition: DeclSpec.h:2237
clang::AccessSpecifier
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:98
clang::Parser
Parser - This implements a parser for the C family of languages.
Definition: Parser.h:58
clang::Sema::ActOnDefaultCtorInitializers
void ActOnDefaultCtorInitializers(Decl *CDtorDecl)
Definition: SemaDeclCXX.cpp:5264
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::Sema::CXXThisScopeRAII
RAII object used to temporarily allow the C++ &#39;this&#39; expression to be used, with the given qualifiers...
Definition: Sema.h:5116
clang::ParenBraceBracketBalancer
RAII object that makes sure paren/bracket/brace count is correct after declaration/statement parsing...
Definition: RAIIObjectsForParser.h:325
clang::Sema::canSkipFunctionBody
bool canSkipFunctionBody(Decl *D)
Determine whether we can skip parsing the body of a function definition, assuming we don&#39;t care about...
Definition: SemaDecl.cpp:13048
clang::ParmVarDecl
Represents a parameter to a function.
Definition: Decl.h:1550
clang::index::SymbolKind::Class
clang::Sema::MarkAsLateParsedTemplate
void MarkAsLateParsedTemplate(FunctionDecl *FD, Decl *FnD, CachedTokens &Toks)
Definition: SemaTemplate.cpp:9985
clang::Token::getKind
tok::TokenKind getKind() const
Definition: Token.h:90
clang::Parser::SkipUntil
bool SkipUntil(tok::TokenKind T, SkipUntilFlags Flags=static_cast< SkipUntilFlags >(0))
SkipUntil - Read tokens until we get to the specified token, then consume it (unless StopBeforeMatch ...
Definition: Parser.h:1056
ParseDiagnostic.h
clang::Qualifiers
The collection of all-type qualifiers we support.
Definition: Type.h:141
clang::Sema::ActOnStartOfFunctionDef
Decl * ActOnStartOfFunctionDef(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParamLists, SkipBodyInfo *SkipBody=nullptr)
Definition: SemaDecl.cpp:12629
clang::Preprocessor::getLocForEndOfToken
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset=0)
Computes the source location just past the end of the token at this source location.
Definition: Preprocessor.h:1673
clang::Parser::TryConsumeToken
bool TryConsumeToken(tok::TokenKind Expected)
Definition: Parser.h:425
clang::ParmVarDecl::setUninstantiatedDefaultArg
void setUninstantiatedDefaultArg(Expr *arg)
Definition: Decl.cpp:2610
clang::ParsingDeclarator::complete
void complete(Decl *D)
Definition: RAIIObjectsForParser.h:222
clang::FDK_Definition
Definition: DeclSpec.h:1718
clang::Decl::IDNS_OrdinaryFriend
This declaration is a friend function.
Definition: DeclBase.h:153
clang::Token
Token - This structure provides full information about a lexed token.
Definition: Token.h:35
clang::Decl::isInIdentifierNamespace
bool isInIdentifierNamespace(unsigned NS) const
Definition: DeclBase.h:796
clang::Token::setKind
void setKind(tok::TokenKind K)
Definition: Token.h:91
clang::diff::Delete
Definition: ASTDiff.h:30
clang::ActionResult::get
PtrTy get() const
Definition: Ownership.h:174
clang::format::FormatToken::isNot
bool isNot(T Kind) const
Definition: FormatToken.h:323
clang::Sema::TentativeAnalysisScope
RAII class used to indicate that we are performing provisional semantic analysis to determine the val...
Definition: Sema.h:7598
clang::Sema::CorrectDelayedTyposInExpr
ExprResult CorrectDelayedTyposInExpr(Expr *E, VarDecl *InitDecl=nullptr, llvm::function_ref< ExprResult(Expr *)> Filter=[](Expr *E) -> ExprResult { return E;})
Process any TypoExprs in the given Expr and its children, generating diagnostics as appropriate and r...
Definition: SemaExprCXX.cpp:7771
clang::ParsingDeclarator::getDeclSpec
const ParsingDeclSpec & getDeclSpec() const
Definition: RAIIObjectsForParser.h:209
clang::Scope
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:41
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::Parser::ConsumeAnyToken
SourceLocation ConsumeAnyToken(bool ConsumeCodeCompletionTok=false)
ConsumeAnyToken - Dispatch to the right Consume* method based on the current token type...
Definition: Parser.h:445
clang::Sema::ActOnFinishFunctionBody
Decl * ActOnFinishFunctionBody(Decl *Decl, Stmt *Body)
Definition: SemaDecl.cpp:13076
clang::Sema::getDiagnostics
DiagnosticsEngine & getDiagnostics() const
Definition: Sema.h:1235
clang::ParsingDeclarator
A class for parsing a declarator.
Definition: RAIIObjectsForParser.h:201
clang::Parser::UnannotatedTentativeParsingAction::UnannotatedTentativeParsingAction
UnannotatedTentativeParsingAction(Parser &Self, tok::TokenKind EndKind)
Definition: ParseCXXInlineMethods.cpp:974
clang::Sema::ExpressionEvaluationContext::PotentiallyEvaluatedIfUsed
The current expression is potentially evaluated, but any declarations referenced inside that expressi...
llvm::MutableArrayRef
Definition: LLVM.h:33
DeclSpec.h
This file defines the classes used to store parsed information about declaration-specifiers and decla...
clang::Parser::SkipMalformedDecl
void SkipMalformedDecl()
SkipMalformedDecl - Read tokens until we get to some likely good stopping point for skipping past a s...
Definition: ParseDecl.cpp:1839
clang::Token::setEofData
void setEofData(const void *D)
Definition: Token.h:194
clang::Token::getLocation
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:124
clang::DeclSpec::isConstexprSpecified
bool isConstexprSpecified() const
Definition: DeclSpec.h:727
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
Scope.h
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::Scope::CompoundStmtScope
This is a compound statement scope.
Definition: Scope.h:131
clang::Sema::SetDeclDeleted
void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc)
Definition: SemaDeclCXX.cpp:14579
clang::ActionResult::isInvalid
bool isInvalid() const
Definition: Ownership.h:170
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::ActionResult::isUsable
bool isUsable() const
Definition: Ownership.h:171
clang::ObjCSubstitutionContext::Result
The result type of a method or function.
clang::Parser::getLangOpts
const LangOptions & getLangOpts() const
Definition: Parser.h:372
clang::Scope::FunctionDeclarationScope
This is a scope that corresponds to the parameters within a function prototype for a function declara...
Definition: Scope.h:88
clang::Sema::CheckForFunctionRedefinition
void CheckForFunctionRedefinition(FunctionDecl *FD, const FunctionDecl *EffectiveDefinition=nullptr, SkipBodyInfo *SkipBody=nullptr)
Definition: SemaDecl.cpp:12701
clang::Sema::ActOnSkippedFunctionBody
Decl * ActOnSkippedFunctionBody(Decl *Decl)
Definition: SemaDecl.cpp:13066
clang::Sema::ActOnStartCXXInClassMemberInitializer
void ActOnStartCXXInClassMemberInitializer()
Enter a new C++ default initializer scope.
Definition: SemaDeclCXX.cpp:3636
clang::Parser::StopAtSemi
Stop skipping at semicolon.
Definition: Parser.h:1036
clang::ActionResult
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:157
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::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::Declarator::getFunctionDefinitionKind
FunctionDefinitionKind getFunctionDefinitionKind() const
Definition: DeclSpec.h:2466
clang::format::FormatToken::is
bool is(tok::TokenKind Kind) const
Definition: FormatToken.h:307
clang::CXXMethodDecl
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2041
clang::Sema::SetDeclDefaulted
void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc)
Definition: SemaDeclCXX.cpp:14647
clang::Parser::UnannotatedTentativeParsingAction
A tentative parsing action that can also revert token annotations.
Definition: ParseCXXInlineMethods.cpp:972
clang::Token::getEofData
const void * getEofData() const
Definition: Token.h:190
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::tok::TokenKind
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:25
llvm::SmallVector
Definition: LLVM.h:36
clang::VirtSpecifiers
Represents a C++11 virt-specifier-seq.
Definition: DeclSpec.h:2499
clang::ParmVarDecl::hasUninstantiatedDefaultArg
bool hasUninstantiatedDefaultArg() const
Definition: Decl.h:1664
clang::Parser::getCurScope
Scope * getCurScope() const
Definition: Parser.h:379
clang::Sema::ActOnFinishInlineFunctionDef
void ActOnFinishInlineFunctionDef(FunctionDecl *D)
Definition: SemaDecl.cpp:12641
clang::Scope::ClassScope
The scope of a struct/union/class definition.
Definition: Scope.h:66
clang::Token::isNot
bool isNot(tok::TokenKind K) const
Definition: Token.h:96
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:22
clang::SourceLocation::isValid
bool isValid() const
Return true if this is a valid SourceLocation object.
Definition: SourceLocation.h:108
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::VarDecl::getInit
const Expr * getInit() const
Definition: Decl.h:1220
clang::Scope::TemplateParamScope
This is a scope that corresponds to the template parameters of a C++ template.
Definition: Scope.h:78
RAIIObjectsForParser.h
clang::FunctionDecl::setWillHaveBody
void setWillHaveBody(bool V=true)
Definition: Decl.h:2222
clang::Token::isOneOf
bool isOneOf(tok::TokenKind K1, tok::TokenKind K2) const
Definition: Token.h:97
clang::frontend::CPlusPlus11
Definition: LangStandard.h:27
clang::ParmVarDecl::getUninstantiatedDefaultArg
Expr * getUninstantiatedDefaultArg()
Definition: Decl.cpp:2615
clang::comments::tok::eof
Definition: CommentLexer.h:34
clang::Parser::Diag
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Definition: Parser.cpp:73
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
clang::Parser::ParseAssignmentExpression
ExprResult ParseAssignmentExpression(TypeCastState isTypeCast=NotTypeCast)
Parse an expr that doesn&#39;t include (top-level) commas.
Definition: ParseExpr.cpp:160
clang::ExceptionSpecificationType
ExceptionSpecificationType
The various types of exception specifications that exist in C++11.
Definition: ExceptionSpecificationType.h:21
clang::Scope::DeclScope
This is a scope that can contain a declaration.
Definition: Scope.h:60
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::Parser::ConsumeToken
SourceLocation ConsumeToken()
ConsumeToken - Consume the current &#39;peek token&#39; and lex the next one.
Definition: Parser.h:417
clang::Sema::ActOnPureSpecifier
void ActOnPureSpecifier(Decl *D, SourceLocation PureSpecLoc)
Definition: SemaDeclCXX.cpp:14889
clang::AttrSyntax::C
clang::Sema::CurContext
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:336
clang::diag::kind
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:61
clang::Token::setLocation
void setLocation(SourceLocation L)
Definition: Token.h:132
clang::SourceRange
A trivial tuple used to represent a source range.
Definition: SourceLocation.h:198
clang::NamedDecl
This represents a decl that may have a name.
Definition: Decl.h:249
clang::Parser::UnannotatedTentativeParsingAction::RevertAnnotations
void RevertAnnotations()
Definition: ParseCXXInlineMethods.cpp:984
clang::ParsedAttributes
ParsedAttributes - A collection of parsed attributes.
Definition: ParsedAttr.h:855
clang::ICIS_NoInit
No in-class initializer.
Definition: Specifiers.h:230
clang::FunctionTemplateDecl
Declaration of a template function.
Definition: DeclTemplate.h:969
clang::Sema::IsInsideALocalClassWithinATemplateFunction
bool IsInsideALocalClassWithinATemplateFunction()
Definition: SemaTemplate.cpp:10006
clang::Token::startToken
void startToken()
Reset all flags to cleared.
Definition: Token.h:169
clang::Parser::StopBeforeMatch
Stop skipping at specified token, but don&#39;t skip the token itself.
Definition: Parser.h:1038
clang::Sema::ActOnFriendFunctionDecl
NamedDecl * ActOnFriendFunctionDecl(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParams)
Definition: SemaDeclCXX.cpp:14262
clang::Sema::ActOnReenterTemplateScope
unsigned ActOnReenterTemplateScope(Scope *S, Decl *Template)
Definition: SemaDeclCXX.cpp:8010
clang::Token::getEndLoc
SourceLocation getEndLoc() const
Definition: Token.h:151