clang 10.0.0git

ParseCXXInlineMethods.cpp
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1 //===--- ParseCXXInlineMethods.cpp - C++ class inline methods parsing------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements parsing for C++ class inline methods.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #include "clang/Parse/Parser.h"
14 #include "clang/AST/DeclTemplate.h"
15 #include "clang/Parse/ParseDiagnostic.h"
16 #include "clang/Parse/RAIIObjectsForParser.h"
17 #include "clang/Sema/DeclSpec.h"
18 #include "clang/Sema/Scope.h"
19 using namespace clang;
20
21 /// ParseCXXInlineMethodDef - We parsed and verified that the specified
22 /// Declarator is a well formed C++ inline method definition. Now lex its body
23 /// and store its tokens for parsing after the C++ class is complete.
24 NamedDecl *Parser::ParseCXXInlineMethodDef(
25 AccessSpecifier AS, ParsedAttributes &AccessAttrs, ParsingDeclarator &D,
26 const ParsedTemplateInfo &TemplateInfo, const VirtSpecifiers &VS,
27 SourceLocation PureSpecLoc) {
28 assert(D.isFunctionDeclarator() && "This isn't a function declarator!");
29 assert(Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try, tok::equal) &&
30 "Current token not a '{', ':', '=', or 'try'!");
31
32 MultiTemplateParamsArg TemplateParams(
33 TemplateInfo.TemplateParams ? TemplateInfo.TemplateParams->data()
34 : nullptr,
35 TemplateInfo.TemplateParams ? TemplateInfo.TemplateParams->size() : 0);
36
37 NamedDecl *FnD;
38 if (D.getDeclSpec().isFriendSpecified())
39 FnD = Actions.ActOnFriendFunctionDecl(getCurScope(), D,
40 TemplateParams);
41 else {
42 FnD = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS, D,
43 TemplateParams, nullptr,
44 VS, ICIS_NoInit);
45 if (FnD) {
46 Actions.ProcessDeclAttributeList(getCurScope(), FnD, AccessAttrs);
47 if (PureSpecLoc.isValid())
48 Actions.ActOnPureSpecifier(FnD, PureSpecLoc);
49 }
50 }
51
52 if (FnD)
53 HandleMemberFunctionDeclDelays(D, FnD);
54
55 D.complete(FnD);
56
57 if (TryConsumeToken(tok::equal)) {
58 if (!FnD) {
59 SkipUntil(tok::semi);
60 return nullptr;
61 }
62
63 bool Delete = false;
64 SourceLocation KWLoc;
65 SourceLocation KWEndLoc = Tok.getEndLoc().getLocWithOffset(-1);
66 if (TryConsumeToken(tok::kw_delete, KWLoc)) {
67 Diag(KWLoc, getLangOpts().CPlusPlus11
68 ? diag::warn_cxx98_compat_defaulted_deleted_function
69 : diag::ext_defaulted_deleted_function)
70 << 1 /* deleted */;
71 Actions.SetDeclDeleted(FnD, KWLoc);
72 Delete = true;
73 if (auto *DeclAsFunction = dyn_cast<FunctionDecl>(FnD)) {
74 DeclAsFunction->setRangeEnd(KWEndLoc);
75 }
76 } else if (TryConsumeToken(tok::kw_default, KWLoc)) {
77 Diag(KWLoc, getLangOpts().CPlusPlus11
78 ? diag::warn_cxx98_compat_defaulted_deleted_function
79 : diag::ext_defaulted_deleted_function)
80 << 0 /* defaulted */;
81 Actions.SetDeclDefaulted(FnD, KWLoc);
82 if (auto *DeclAsFunction = dyn_cast<FunctionDecl>(FnD)) {
83 DeclAsFunction->setRangeEnd(KWEndLoc);
84 }
85 } else {
86 llvm_unreachable("function definition after = not 'delete' or 'default'");
87 }
88
89 if (Tok.is(tok::comma)) {
90 Diag(KWLoc, diag::err_default_delete_in_multiple_declaration)
91 << Delete;
92 SkipUntil(tok::semi);
93 } else if (ExpectAndConsume(tok::semi, diag::err_expected_after,
94 Delete ? "delete" : "default")) {
95 SkipUntil(tok::semi);
96 }
97
98 return FnD;
99 }
100
101 if (SkipFunctionBodies && (!FnD || Actions.canSkipFunctionBody(FnD)) &&
102 trySkippingFunctionBody()) {
103 Actions.ActOnSkippedFunctionBody(FnD);
104 return FnD;
105 }
106
107 // In delayed template parsing mode, if we are within a class template
108 // or if we are about to parse function member template then consume
109 // the tokens and store them for parsing at the end of the translation unit.
110 if (getLangOpts().DelayedTemplateParsing &&
111 D.getFunctionDefinitionKind() == FDK_Definition &&
112 !D.getDeclSpec().hasConstexprSpecifier() &&
113 !(FnD && FnD->getAsFunction() &&
114 FnD->getAsFunction()->getReturnType()->getContainedAutoType()) &&
115 ((Actions.CurContext->isDependentContext() ||
116 (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
117 TemplateInfo.Kind != ParsedTemplateInfo::ExplicitSpecialization)) &&
118 !Actions.IsInsideALocalClassWithinATemplateFunction())) {
119
120 CachedTokens Toks;
121 LexTemplateFunctionForLateParsing(Toks);
122
123 if (FnD) {
124 FunctionDecl *FD = FnD->getAsFunction();
125 Actions.CheckForFunctionRedefinition(FD);
126 Actions.MarkAsLateParsedTemplate(FD, FnD, Toks);
127 }
128
129 return FnD;
130 }
131
132 // Consume the tokens and store them for later parsing.
133
134 LexedMethod* LM = new LexedMethod(this, FnD);
135 getCurrentClass().LateParsedDeclarations.push_back(LM);
136 LM->TemplateScope = getCurScope()->isTemplateParamScope() ||
137 (FnD && isa<FunctionTemplateDecl>(FnD) &&
138 cast<FunctionTemplateDecl>(FnD)->isAbbreviated());
139 CachedTokens &Toks = LM->Toks;
140
141 tok::TokenKind kind = Tok.getKind();
142 // Consume everything up to (and including) the left brace of the
143 // function body.
144 if (ConsumeAndStoreFunctionPrologue(Toks)) {
145 // We didn't find the left-brace we expected after the
146 // constructor initializer; we already printed an error, and it's likely
147 // impossible to recover, so don't try to parse this method later.
148 // Skip over the rest of the decl and back to somewhere that looks
149 // reasonable.
150 SkipMalformedDecl();
151 delete getCurrentClass().LateParsedDeclarations.back();
152 getCurrentClass().LateParsedDeclarations.pop_back();
153 return FnD;
154 } else {
155 // Consume everything up to (and including) the matching right brace.
156 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
157 }
158
159 // If we're in a function-try-block, we need to store all the catch blocks.
160 if (kind == tok::kw_try) {
161 while (Tok.is(tok::kw_catch)) {
162 ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false);
163 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
164 }
165 }
166
167 if (FnD) {
168 FunctionDecl *FD = FnD->getAsFunction();
169 // Track that this function will eventually have a body; Sema needs
170 // to know this.
171 Actions.CheckForFunctionRedefinition(FD);
172 FD->setWillHaveBody(true);
173 } else {
174 // If semantic analysis could not build a function declaration,
175 // just throw away the late-parsed declaration.
176 delete getCurrentClass().LateParsedDeclarations.back();
177 getCurrentClass().LateParsedDeclarations.pop_back();
178 }
179
180 return FnD;
181 }
182
183 /// ParseCXXNonStaticMemberInitializer - We parsed and verified that the
184 /// specified Declarator is a well formed C++ non-static data member
185 /// declaration. Now lex its initializer and store its tokens for parsing
186 /// after the class is complete.
187 void Parser::ParseCXXNonStaticMemberInitializer(Decl *VarD) {
188 assert(Tok.isOneOf(tok::l_brace, tok::equal) &&
189 "Current token not a '{' or '='!");
190
191 LateParsedMemberInitializer *MI =
192 new LateParsedMemberInitializer(this, VarD);
193 getCurrentClass().LateParsedDeclarations.push_back(MI);
194 CachedTokens &Toks = MI->Toks;
195
196 tok::TokenKind kind = Tok.getKind();
197 if (kind == tok::equal) {
198 Toks.push_back(Tok);
199 ConsumeToken();
200 }
201
202 if (kind == tok::l_brace) {
203 // Begin by storing the '{' token.
204 Toks.push_back(Tok);
205 ConsumeBrace();
206
207 // Consume everything up to (and including) the matching right brace.
208 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/true);
209 } else {
210 // Consume everything up to (but excluding) the comma or semicolon.
211 ConsumeAndStoreInitializer(Toks, CIK_DefaultInitializer);
212 }
213
214 // Store an artificial EOF token to ensure that we don't run off the end of
215 // the initializer when we come to parse it.
216 Token Eof;
217 Eof.startToken();
218 Eof.setKind(tok::eof);
219 Eof.setLocation(Tok.getLocation());
220 Eof.setEofData(VarD);
221 Toks.push_back(Eof);
222 }
223
224 Parser::LateParsedDeclaration::~LateParsedDeclaration() {}
225 void Parser::LateParsedDeclaration::ParseLexedMethodDeclarations() {}
226 void Parser::LateParsedDeclaration::ParseLexedMemberInitializers() {}
227 void Parser::LateParsedDeclaration::ParseLexedMethodDefs() {}
228 void Parser::LateParsedDeclaration::ParseLexedPragmas() {}
229
230 Parser::LateParsedClass::LateParsedClass(Parser *P, ParsingClass *C)
231 : Self(P), Class(C) {}
232
233 Parser::LateParsedClass::~LateParsedClass() {
234 Self->DeallocateParsedClasses(Class);
235 }
236
237 void Parser::LateParsedClass::ParseLexedMethodDeclarations() {
238 Self->ParseLexedMethodDeclarations(*Class);
239 }
240
241 void Parser::LateParsedClass::ParseLexedMemberInitializers() {
242 Self->ParseLexedMemberInitializers(*Class);
243 }
244
245 void Parser::LateParsedClass::ParseLexedMethodDefs() {
246 Self->ParseLexedMethodDefs(*Class);
247 }
248
249 void Parser::LateParsedClass::ParseLexedPragmas() {
250 Self->ParseLexedPragmas(*Class);
251 }
252
253 void Parser::LateParsedMethodDeclaration::ParseLexedMethodDeclarations() {
254 Self->ParseLexedMethodDeclaration(*this);
255 }
256
257 void Parser::LexedMethod::ParseLexedMethodDefs() {
258 Self->ParseLexedMethodDef(*this);
259 }
260
261 void Parser::LateParsedMemberInitializer::ParseLexedMemberInitializers() {
262 Self->ParseLexedMemberInitializer(*this);
263 }
264
265 void Parser::LateParsedPragma::ParseLexedPragmas() {
266 Self->ParseLexedPragma(*this);
267 }
268
269 /// ParseLexedMethodDeclarations - We finished parsing the member
270 /// specification of a top (non-nested) C++ class. Now go over the
271 /// stack of method declarations with some parts for which parsing was
272 /// delayed (such as default arguments) and parse them.
273 void Parser::ParseLexedMethodDeclarations(ParsingClass &Class) {
274 bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
275 ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
276 HasTemplateScope);
277 TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
278 if (HasTemplateScope) {
279 Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
280 ++CurTemplateDepthTracker;
281 }
282
283 // The current scope is still active if we're the top-level class.
284 // Otherwise we'll need to push and enter a new scope.
285 bool HasClassScope = !Class.TopLevelClass;
286 ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope,
287 HasClassScope);
288 if (HasClassScope)
289 Actions.ActOnStartDelayedMemberDeclarations(getCurScope(),
290 Class.TagOrTemplate);
291
292 for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
293 Class.LateParsedDeclarations[i]->ParseLexedMethodDeclarations();
294 }
295
296 if (HasClassScope)
297 Actions.ActOnFinishDelayedMemberDeclarations(getCurScope(),
298 Class.TagOrTemplate);
299 }
300
301 void Parser::ParseLexedMethodDeclaration(LateParsedMethodDeclaration &LM) {
302 // If this is a member template, introduce the template parameter scope.
303 ParseScope TemplateScope(this, Scope::TemplateParamScope, LM.TemplateScope);
304 TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
305 if (LM.TemplateScope) {
306 Actions.ActOnReenterTemplateScope(getCurScope(), LM.Method);
307 ++CurTemplateDepthTracker;
308 }
309 // Start the delayed C++ method declaration
310 Actions.ActOnStartDelayedCXXMethodDeclaration(getCurScope(), LM.Method);
311
312 // Introduce the parameters into scope and parse their default
313 // arguments.
314 ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
315 Scope::FunctionDeclarationScope | Scope::DeclScope);
316 for (unsigned I = 0, N = LM.DefaultArgs.size(); I != N; ++I) {
317 auto Param = cast<ParmVarDecl>(LM.DefaultArgs[I].Param);
318 // Introduce the parameter into scope.
319 bool HasUnparsed = Param->hasUnparsedDefaultArg();
320 Actions.ActOnDelayedCXXMethodParameter(getCurScope(), Param);
321 std::unique_ptr<CachedTokens> Toks = std::move(LM.DefaultArgs[I].Toks);
322 if (Toks) {
323 ParenBraceBracketBalancer BalancerRAIIObj(*this);
324
325 // Mark the end of the default argument so that we know when to stop when
326 // we parse it later on.
327 Token LastDefaultArgToken = Toks->back();
328 Token DefArgEnd;
329 DefArgEnd.startToken();
330 DefArgEnd.setKind(tok::eof);
331 DefArgEnd.setLocation(LastDefaultArgToken.getEndLoc());
332 DefArgEnd.setEofData(Param);
333 Toks->push_back(DefArgEnd);
334
335 // Parse the default argument from its saved token stream.
336 Toks->push_back(Tok); // So that the current token doesn't get lost
337 PP.EnterTokenStream(*Toks, true, /*IsReinject*/ true);
338
339 // Consume the previously-pushed token.
340 ConsumeAnyToken();
341
342 // Consume the '='.
343 assert(Tok.is(tok::equal) && "Default argument not starting with '='");
344 SourceLocation EqualLoc = ConsumeToken();
345
346 // The argument isn't actually potentially evaluated unless it is
347 // used.
348 EnterExpressionEvaluationContext Eval(
349 Actions,
350 Sema::ExpressionEvaluationContext::PotentiallyEvaluatedIfUsed, Param);
351
352 ExprResult DefArgResult;
353 if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
354 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
355 DefArgResult = ParseBraceInitializer();
356 } else
357 DefArgResult = ParseAssignmentExpression();
358 DefArgResult = Actions.CorrectDelayedTyposInExpr(DefArgResult);
359 if (DefArgResult.isInvalid()) {
360 Actions.ActOnParamDefaultArgumentError(Param, EqualLoc);
361 } else {
362 if (Tok.isNot(tok::eof) || Tok.getEofData() != Param) {
363 // The last two tokens are the terminator and the saved value of
364 // Tok; the last token in the default argument is the one before
365 // those.
366 assert(Toks->size() >= 3 && "expected a token in default arg");
367 Diag(Tok.getLocation(), diag::err_default_arg_unparsed)
368 << SourceRange(Tok.getLocation(),
369 (*Toks)[Toks->size() - 3].getLocation());
370 }
371 Actions.ActOnParamDefaultArgument(Param, EqualLoc,
372 DefArgResult.get());
373 }
374
375 // There could be leftover tokens (e.g. because of an error).
376 // Skip through until we reach the 'end of default argument' token.
377 while (Tok.isNot(tok::eof))
378 ConsumeAnyToken();
379
380 if (Tok.is(tok::eof) && Tok.getEofData() == Param)
381 ConsumeAnyToken();
382 } else if (HasUnparsed) {
383 assert(Param->hasInheritedDefaultArg());
384 FunctionDecl *Old = cast<FunctionDecl>(LM.Method)->getPreviousDecl();
385 ParmVarDecl *OldParam = Old->getParamDecl(I);
386 assert (!OldParam->hasUnparsedDefaultArg());
387 if (OldParam->hasUninstantiatedDefaultArg())
388 Param->setUninstantiatedDefaultArg(
389 OldParam->getUninstantiatedDefaultArg());
390 else
391 Param->setDefaultArg(OldParam->getInit());
392 }
393 }
394
395 // Parse a delayed exception-specification, if there is one.
396 if (CachedTokens *Toks = LM.ExceptionSpecTokens) {
397 ParenBraceBracketBalancer BalancerRAIIObj(*this);
398
399 // Add the 'stop' token.
400 Token LastExceptionSpecToken = Toks->back();
401 Token ExceptionSpecEnd;
402 ExceptionSpecEnd.startToken();
403 ExceptionSpecEnd.setKind(tok::eof);
404 ExceptionSpecEnd.setLocation(LastExceptionSpecToken.getEndLoc());
405 ExceptionSpecEnd.setEofData(LM.Method);
406 Toks->push_back(ExceptionSpecEnd);
407
408 // Parse the default argument from its saved token stream.
409 Toks->push_back(Tok); // So that the current token doesn't get lost
410 PP.EnterTokenStream(*Toks, true, /*IsReinject*/true);
411
412 // Consume the previously-pushed token.
413 ConsumeAnyToken();
414
415 // C++11 [expr.prim.general]p3:
416 // If a declaration declares a member function or member function
417 // template of a class X, the expression this is a prvalue of type
418 // "pointer to cv-qualifier-seq X" between the optional cv-qualifer-seq
419 // and the end of the function-definition, member-declarator, or
420 // declarator.
421 CXXMethodDecl *Method;
422 if (FunctionTemplateDecl *FunTmpl
423 = dyn_cast<FunctionTemplateDecl>(LM.Method))
424 Method = cast<CXXMethodDecl>(FunTmpl->getTemplatedDecl());
425 else
426 Method = cast<CXXMethodDecl>(LM.Method);
427
428 Sema::CXXThisScopeRAII ThisScope(Actions, Method->getParent(),
429 Method->getMethodQualifiers(),
430 getLangOpts().CPlusPlus11);
431
432 // Parse the exception-specification.
433 SourceRange SpecificationRange;
434 SmallVector<ParsedType, 4> DynamicExceptions;
435 SmallVector<SourceRange, 4> DynamicExceptionRanges;
436 ExprResult NoexceptExpr;
437 CachedTokens *ExceptionSpecTokens;
438
439 ExceptionSpecificationType EST
440 = tryParseExceptionSpecification(/*Delayed=*/false, SpecificationRange,
441 DynamicExceptions,
442 DynamicExceptionRanges, NoexceptExpr,
443 ExceptionSpecTokens);
444
445 if (Tok.isNot(tok::eof) || Tok.getEofData() != LM.Method)
446 Diag(Tok.getLocation(), diag::err_except_spec_unparsed);
447
448 // Attach the exception-specification to the method.
449 Actions.actOnDelayedExceptionSpecification(LM.Method, EST,
450 SpecificationRange,
451 DynamicExceptions,
452 DynamicExceptionRanges,
453 NoexceptExpr.isUsable()?
454 NoexceptExpr.get() : nullptr);
455
456 // There could be leftover tokens (e.g. because of an error).
457 // Skip through until we reach the original token position.
458 while (Tok.isNot(tok::eof))
459 ConsumeAnyToken();
460
461 // Clean up the remaining EOF token.
462 if (Tok.is(tok::eof) && Tok.getEofData() == LM.Method)
463 ConsumeAnyToken();
464
465 delete Toks;
466 LM.ExceptionSpecTokens = nullptr;
467 }
468
469 PrototypeScope.Exit();
470
471 // Finish the delayed C++ method declaration.
472 Actions.ActOnFinishDelayedCXXMethodDeclaration(getCurScope(), LM.Method);
473 }
474
475 /// ParseLexedMethodDefs - We finished parsing the member specification of a top
476 /// (non-nested) C++ class. Now go over the stack of lexed methods that were
477 /// collected during its parsing and parse them all.
478 void Parser::ParseLexedMethodDefs(ParsingClass &Class) {
479 bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
480 ParseScope ClassTemplateScope(this, Scope::TemplateParamScope, HasTemplateScope);
481 TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
482 if (HasTemplateScope) {
483 Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
484 ++CurTemplateDepthTracker;
485 }
486 bool HasClassScope = !Class.TopLevelClass;
487 ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope,
488 HasClassScope);
489
490 for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
491 Class.LateParsedDeclarations[i]->ParseLexedMethodDefs();
492 }
493 }
494
495 void Parser::ParseLexedMethodDef(LexedMethod &LM) {
496 // If this is a member template, introduce the template parameter scope.
497 ParseScope TemplateScope(this, Scope::TemplateParamScope, LM.TemplateScope);
498 TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
499 if (LM.TemplateScope) {
500 Actions.ActOnReenterTemplateScope(getCurScope(), LM.D);
501 ++CurTemplateDepthTracker;
502 }
503
504 ParenBraceBracketBalancer BalancerRAIIObj(*this);
505
506 assert(!LM.Toks.empty() && "Empty body!");
507 Token LastBodyToken = LM.Toks.back();
508 Token BodyEnd;
509 BodyEnd.startToken();
510 BodyEnd.setKind(tok::eof);
511 BodyEnd.setLocation(LastBodyToken.getEndLoc());
512 BodyEnd.setEofData(LM.D);
513 LM.Toks.push_back(BodyEnd);
514 // Append the current token at the end of the new token stream so that it
515 // doesn't get lost.
516 LM.Toks.push_back(Tok);
517 PP.EnterTokenStream(LM.Toks, true, /*IsReinject*/true);
518
519 // Consume the previously pushed token.
520 ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
521 assert(Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try)
522 && "Inline method not starting with '{', ':' or 'try'");
523
524 // Parse the method body. Function body parsing code is similar enough
525 // to be re-used for method bodies as well.
526 ParseScope FnScope(this, Scope::FnScope | Scope::DeclScope |
527 Scope::CompoundStmtScope);
528 Actions.ActOnStartOfFunctionDef(getCurScope(), LM.D);
529
530 if (Tok.is(tok::kw_try)) {
531 ParseFunctionTryBlock(LM.D, FnScope);
532
533 while (Tok.isNot(tok::eof))
534 ConsumeAnyToken();
535
536 if (Tok.is(tok::eof) && Tok.getEofData() == LM.D)
537 ConsumeAnyToken();
538 return;
539 }
540 if (Tok.is(tok::colon)) {
541 ParseConstructorInitializer(LM.D);
542
543 // Error recovery.
544 if (!Tok.is(tok::l_brace)) {
545 FnScope.Exit();
546 Actions.ActOnFinishFunctionBody(LM.D, nullptr);
547
548 while (Tok.isNot(tok::eof))
549 ConsumeAnyToken();
550
551 if (Tok.is(tok::eof) && Tok.getEofData() == LM.D)
552 ConsumeAnyToken();
553 return;
554 }
555 } else
556 Actions.ActOnDefaultCtorInitializers(LM.D);
557
558 assert((Actions.getDiagnostics().hasErrorOccurred() ||
559 !isa<FunctionTemplateDecl>(LM.D) ||
560 cast<FunctionTemplateDecl>(LM.D)->getTemplateParameters()->getDepth()
561 < TemplateParameterDepth) &&
562 "TemplateParameterDepth should be greater than the depth of "
563 "current template being instantiated!");
564
565 ParseFunctionStatementBody(LM.D, FnScope);
566
567 while (Tok.isNot(tok::eof))
568 ConsumeAnyToken();
569
570 if (Tok.is(tok::eof) && Tok.getEofData() == LM.D)
571 ConsumeAnyToken();
572
573 if (auto *FD = dyn_cast_or_null<FunctionDecl>(LM.D))
574 if (isa<CXXMethodDecl>(FD) ||
575 FD->isInIdentifierNamespace(Decl::IDNS_OrdinaryFriend))
576 Actions.ActOnFinishInlineFunctionDef(FD);
577 }
578
579 /// ParseLexedMemberInitializers - We finished parsing the member specification
580 /// of a top (non-nested) C++ class. Now go over the stack of lexed data member
581 /// initializers that were collected during its parsing and parse them all.
582 void Parser::ParseLexedMemberInitializers(ParsingClass &Class) {
583 bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
584 ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
585 HasTemplateScope);
586 TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
587 if (HasTemplateScope) {
588 Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
589 ++CurTemplateDepthTracker;
590 }
591 // Set or update the scope flags.
592 bool AlreadyHasClassScope = Class.TopLevelClass;
593 unsigned ScopeFlags = Scope::ClassScope|Scope::DeclScope;
594 ParseScope ClassScope(this, ScopeFlags, !AlreadyHasClassScope);
595 ParseScopeFlags ClassScopeFlags(this, ScopeFlags, AlreadyHasClassScope);
596
597 if (!AlreadyHasClassScope)
598 Actions.ActOnStartDelayedMemberDeclarations(getCurScope(),
599 Class.TagOrTemplate);
600
601 if (!Class.LateParsedDeclarations.empty()) {
602 // C++11 [expr.prim.general]p4:
603 // Otherwise, if a member-declarator declares a non-static data member
604 // (9.2) of a class X, the expression this is a prvalue of type "pointer
605 // to X" within the optional brace-or-equal-initializer. It shall not
606 // appear elsewhere in the member-declarator.
607 Sema::CXXThisScopeRAII ThisScope(Actions, Class.TagOrTemplate,
608 Qualifiers());
609
610 for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
611 Class.LateParsedDeclarations[i]->ParseLexedMemberInitializers();
612 }
613 }
614
615 if (!AlreadyHasClassScope)
616 Actions.ActOnFinishDelayedMemberDeclarations(getCurScope(),
617 Class.TagOrTemplate);
618
619 Actions.ActOnFinishDelayedMemberInitializers(Class.TagOrTemplate);
620 }
621
622 void Parser::ParseLexedMemberInitializer(LateParsedMemberInitializer &MI) {
623 if (!MI.Field || MI.Field->isInvalidDecl())
624 return;
625
626 ParenBraceBracketBalancer BalancerRAIIObj(*this);
627
628 // Append the current token at the end of the new token stream so that it
629 // doesn't get lost.
630 MI.Toks.push_back(Tok);
631 PP.EnterTokenStream(MI.Toks, true, /*IsReinject*/true);
632
633 // Consume the previously pushed token.
634 ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
635
636 SourceLocation EqualLoc;
637
638 Actions.ActOnStartCXXInClassMemberInitializer();
639
640 ExprResult Init = ParseCXXMemberInitializer(MI.Field, /*IsFunction=*/false,
641 EqualLoc);
642
643 Actions.ActOnFinishCXXInClassMemberInitializer(MI.Field, EqualLoc,
644 Init.get());
645
646 // The next token should be our artificial terminating EOF token.
647 if (Tok.isNot(tok::eof)) {
648 if (!Init.isInvalid()) {
649 SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation);
650 if (!EndLoc.isValid())
651 EndLoc = Tok.getLocation();
652 // No fixit; we can't recover as if there were a semicolon here.
653 Diag(EndLoc, diag::err_expected_semi_decl_list);
654 }
655
656 // Consume tokens until we hit the artificial EOF.
657 while (Tok.isNot(tok::eof))
658 ConsumeAnyToken();
659 }
660 // Make sure this is *our* artificial EOF token.
661 if (Tok.getEofData() == MI.Field)
662 ConsumeAnyToken();
663 }
664
665 void Parser::ParseLexedPragmas(ParsingClass &Class) {
666 bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
667 ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
668 HasTemplateScope);
669 TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
670 if (HasTemplateScope) {
671 Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
672 ++CurTemplateDepthTracker;
673 }
674 bool HasClassScope = !Class.TopLevelClass;
675 ParseScope ClassScope(this, Scope::ClassScope | Scope::DeclScope,
676 HasClassScope);
677
678 for (LateParsedDeclaration *LPD : Class.LateParsedDeclarations)
679 LPD->ParseLexedPragmas();
680 }
681
682 void Parser::ParseLexedPragma(LateParsedPragma &LP) {
683 PP.EnterToken(Tok, /*IsReinject=*/true);
684 PP.EnterTokenStream(LP.toks(), /*DisableMacroExpansion=*/true,
685 /*IsReinject=*/true);
686
687 // Consume the previously pushed token.
688 ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
689 assert(Tok.isAnnotation() && "Expected annotation token.");
690 switch (Tok.getKind()) {
691 case tok::annot_pragma_openmp: {
692 AccessSpecifier AS = LP.getAccessSpecifier();
693 ParsedAttributesWithRange Attrs(AttrFactory);
694 (void)ParseOpenMPDeclarativeDirectiveWithExtDecl(AS, Attrs);
695 break;
696 }
697 default:
698 llvm_unreachable("Unexpected token.");
699 }
700 }
701
702 /// ConsumeAndStoreUntil - Consume and store the token at the passed token
703 /// container until the token 'T' is reached (which gets
704 /// consumed/stored too, if ConsumeFinalToken).
705 /// If StopAtSemi is true, then we will stop early at a ';' character.
706 /// Returns true if token 'T1' or 'T2' was found.
707 /// NOTE: This is a specialized version of Parser::SkipUntil.
708 bool Parser::ConsumeAndStoreUntil(tok::TokenKind T1, tok::TokenKind T2,
709 CachedTokens &Toks,
710 bool StopAtSemi, bool ConsumeFinalToken) {
711 // We always want this function to consume at least one token if the first
712 // token isn't T and if not at EOF.
713 bool isFirstTokenConsumed = true;
714 while (1) {
715 // If we found one of the tokens, stop and return true.
716 if (Tok.is(T1) || Tok.is(T2)) {
717 if (ConsumeFinalToken) {
718 Toks.push_back(Tok);
719 ConsumeAnyToken();
720 }
721 return true;
722 }
723
724 switch (Tok.getKind()) {
725 case tok::eof:
726 case tok::annot_module_begin:
727 case tok::annot_module_end:
728 case tok::annot_module_include:
729 // Ran out of tokens.
730 return false;
731
732 case tok::l_paren:
733 // Recursively consume properly-nested parens.
734 Toks.push_back(Tok);
735 ConsumeParen();
736 ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false);
737 break;
738 case tok::l_square:
739 // Recursively consume properly-nested square brackets.
740 Toks.push_back(Tok);
741 ConsumeBracket();
742 ConsumeAndStoreUntil(tok::r_square, Toks, /*StopAtSemi=*/false);
743 break;
744 case tok::l_brace:
745 // Recursively consume properly-nested braces.
746 Toks.push_back(Tok);
747 ConsumeBrace();
748 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
749 break;
750
751 // Okay, we found a ']' or '}' or ')', which we think should be balanced.
752 // Since the user wasn't looking for this token (if they were, it would
753 // already be handled), this isn't balanced. If there is a LHS token at a
754 // higher level, we will assume that this matches the unbalanced token
755 // and return it. Otherwise, this is a spurious RHS token, which we skip.
756 case tok::r_paren:
757 if (ParenCount && !isFirstTokenConsumed)
758 return false; // Matches something.
759 Toks.push_back(Tok);
760 ConsumeParen();
761 break;
762 case tok::r_square:
763 if (BracketCount && !isFirstTokenConsumed)
764 return false; // Matches something.
765 Toks.push_back(Tok);
766 ConsumeBracket();
767 break;
768 case tok::r_brace:
769 if (BraceCount && !isFirstTokenConsumed)
770 return false; // Matches something.
771 Toks.push_back(Tok);
772 ConsumeBrace();
773 break;
774
775 case tok::semi:
776 if (StopAtSemi)
777 return false;
778 LLVM_FALLTHROUGH;
779 default:
780 // consume this token.
781 Toks.push_back(Tok);
782 ConsumeAnyToken(/*ConsumeCodeCompletionTok*/true);
783 break;
784 }
785 isFirstTokenConsumed = false;
786 }
787 }
788
789 /// Consume tokens and store them in the passed token container until
790 /// we've passed the try keyword and constructor initializers and have consumed
791 /// the opening brace of the function body. The opening brace will be consumed
792 /// if and only if there was no error.
793 ///
794 /// \return True on error.
795 bool Parser::ConsumeAndStoreFunctionPrologue(CachedTokens &Toks) {
796 if (Tok.is(tok::kw_try)) {
797 Toks.push_back(Tok);
798 ConsumeToken();
799 }
800
801 if (Tok.isNot(tok::colon)) {
802 // Easy case, just a function body.
803
804 // Grab any remaining garbage to be diagnosed later. We stop when we reach a
805 // brace: an opening one is the function body, while a closing one probably
806 // means we've reached the end of the class.
807 ConsumeAndStoreUntil(tok::l_brace, tok::r_brace, Toks,
808 /*StopAtSemi=*/true,
809 /*ConsumeFinalToken=*/false);
810 if (Tok.isNot(tok::l_brace))
811 return Diag(Tok.getLocation(), diag::err_expected) << tok::l_brace;
812
813 Toks.push_back(Tok);
814 ConsumeBrace();
815 return false;
816 }
817
818 Toks.push_back(Tok);
819 ConsumeToken();
820
821 // We can't reliably skip over a mem-initializer-id, because it could be
822 // a template-id involving not-yet-declared names. Given:
823 //
824 // S ( ) : a < b < c > ( e )
825 //
826 // 'e' might be an initializer or part of a template argument, depending
827 // on whether 'b' is a template.
828
829 // Track whether we might be inside a template argument. We can give
830 // significantly better diagnostics if we know that we're not.
831 bool MightBeTemplateArgument = false;
832
833 while (true) {
834 // Skip over the mem-initializer-id, if possible.
835 if (Tok.is(tok::kw_decltype)) {
836 Toks.push_back(Tok);
837 SourceLocation OpenLoc = ConsumeToken();
838 if (Tok.isNot(tok::l_paren))
839 return Diag(Tok.getLocation(), diag::err_expected_lparen_after)
840 << "decltype";
841 Toks.push_back(Tok);
842 ConsumeParen();
843 if (!ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/true)) {
844 Diag(Tok.getLocation(), diag::err_expected) << tok::r_paren;
845 Diag(OpenLoc, diag::note_matching) << tok::l_paren;
846 return true;
847 }
848 }
849 do {
850 // Walk over a component of a nested-name-specifier.
851 if (Tok.is(tok::coloncolon)) {
852 Toks.push_back(Tok);
853 ConsumeToken();
854
855 if (Tok.is(tok::kw_template)) {
856 Toks.push_back(Tok);
857 ConsumeToken();
858 }
859 }
860
861 if (Tok.is(tok::identifier)) {
862 Toks.push_back(Tok);
863 ConsumeToken();
864 } else {
865 break;
866 }
867 } while (Tok.is(tok::coloncolon));
868
869 if (Tok.is(tok::code_completion)) {
870 Toks.push_back(Tok);
871 ConsumeCodeCompletionToken();
872 if (Tok.isOneOf(tok::identifier, tok::coloncolon, tok::kw_decltype)) {
873 // Could be the start of another member initializer (the ',' has not
874 // been written yet)
875 continue;
876 }
877 }
878
879 if (Tok.is(tok::comma)) {
880 // The initialization is missing, we'll diagnose it later.
881 Toks.push_back(Tok);
882 ConsumeToken();
883 continue;
884 }
885 if (Tok.is(tok::less))
886 MightBeTemplateArgument = true;
887
888 if (MightBeTemplateArgument) {
889 // We may be inside a template argument list. Grab up to the start of the
890 // next parenthesized initializer or braced-init-list. This *might* be the
891 // initializer, or it might be a subexpression in the template argument
892 // list.
893 // FIXME: Count angle brackets, and clear MightBeTemplateArgument
894 // if all angles are closed.
895 if (!ConsumeAndStoreUntil(tok::l_paren, tok::l_brace, Toks,
896 /*StopAtSemi=*/true,
897 /*ConsumeFinalToken=*/false)) {
898 // We're not just missing the initializer, we're also missing the
899 // function body!
900 return Diag(Tok.getLocation(), diag::err_expected) << tok::l_brace;
901 }
902 } else if (Tok.isNot(tok::l_paren) && Tok.isNot(tok::l_brace)) {
903 // We found something weird in a mem-initializer-id.
904 if (getLangOpts().CPlusPlus11)
905 return Diag(Tok.getLocation(), diag::err_expected_either)
906 << tok::l_paren << tok::l_brace;
907 else
908 return Diag(Tok.getLocation(), diag::err_expected) << tok::l_paren;
909 }
910
911 tok::TokenKind kind = Tok.getKind();
912 Toks.push_back(Tok);
913 bool IsLParen = (kind == tok::l_paren);
914 SourceLocation OpenLoc = Tok.getLocation();
915
916 if (IsLParen) {
917 ConsumeParen();
918 } else {
919 assert(kind == tok::l_brace && "Must be left paren or brace here.");
920 ConsumeBrace();
921 // In C++03, this has to be the start of the function body, which
922 // means the initializer is malformed; we'll diagnose it later.
923 if (!getLangOpts().CPlusPlus11)
924 return false;
925
926 const Token &PreviousToken = Toks[Toks.size() - 2];
927 if (!MightBeTemplateArgument &&
928 !PreviousToken.isOneOf(tok::identifier, tok::greater,
929 tok::greatergreater)) {
930 // If the opening brace is not preceded by one of these tokens, we are
931 // missing the mem-initializer-id. In order to recover better, we need
932 // to use heuristics to determine if this '{' is most likely the
933 // beginning of a brace-init-list or the function body.
934 // Check the token after the corresponding '}'.
935 TentativeParsingAction PA(*this);
936 if (SkipUntil(tok::r_brace) &&
937 !Tok.isOneOf(tok::comma, tok::ellipsis, tok::l_brace)) {
938 // Consider there was a malformed initializer and this is the start
939 // of the function body. We'll diagnose it later.
940 PA.Revert();
941 return false;
942 }
943 PA.Revert();
944 }
945 }
946
947 // Grab the initializer (or the subexpression of the template argument).
948 // FIXME: If we support lambdas here, we'll need to set StopAtSemi to false
949 // if we might be inside the braces of a lambda-expression.
950 tok::TokenKind CloseKind = IsLParen ? tok::r_paren : tok::r_brace;
951 if (!ConsumeAndStoreUntil(CloseKind, Toks, /*StopAtSemi=*/true)) {
952 Diag(Tok, diag::err_expected) << CloseKind;
953 Diag(OpenLoc, diag::note_matching) << kind;
954 return true;
955 }
956
957 // Grab pack ellipsis, if present.
958 if (Tok.is(tok::ellipsis)) {
959 Toks.push_back(Tok);
960 ConsumeToken();
961 }
962
963 // If we know we just consumed a mem-initializer, we must have ',' or '{'
964 // next.
965 if (Tok.is(tok::comma)) {
966 Toks.push_back(Tok);
967 ConsumeToken();
968 } else if (Tok.is(tok::l_brace)) {
969 // This is the function body if the ')' or '}' is immediately followed by
970 // a '{'. That cannot happen within a template argument, apart from the
971 // case where a template argument contains a compound literal:
972 //
973 // S ( ) : a < b < c > ( d ) { }
974 // // End of declaration, or still inside the template argument?
975 //
976 // ... and the case where the template argument contains a lambda:
977 //
978 // S ( ) : a < 0 && b < c > ( d ) + [ ] ( ) { return 0; }
979 // ( ) > ( ) { }
980 //
981 // FIXME: Disambiguate these cases. Note that the latter case is probably
982 // going to be made ill-formed by core issue 1607.
983 Toks.push_back(Tok);
984 ConsumeBrace();
985 return false;
986 } else if (!MightBeTemplateArgument) {
987 return Diag(Tok.getLocation(), diag::err_expected_either) << tok::l_brace
988 << tok::comma;
989 }
990 }
991 }
992
993 /// Consume and store tokens from the '?' to the ':' in a conditional
994 /// expression.
995 bool Parser::ConsumeAndStoreConditional(CachedTokens &Toks) {
996 // Consume '?'.
997 assert(Tok.is(tok::question));
998 Toks.push_back(Tok);
999 ConsumeToken();
1000
1001 while (Tok.isNot(tok::colon)) {
1002 if (!ConsumeAndStoreUntil(tok::question, tok::colon, Toks,
1003 /*StopAtSemi=*/true,
1004 /*ConsumeFinalToken=*/false))
1005 return false;
1006
1007 // If we found a nested conditional, consume it.
1008 if (Tok.is(tok::question) && !ConsumeAndStoreConditional(Toks))
1009 return false;
1010 }
1011
1012 // Consume ':'.
1013 Toks.push_back(Tok);
1014 ConsumeToken();
1015 return true;
1016 }
1017
1018 /// A tentative parsing action that can also revert token annotations.
1019 class Parser::UnannotatedTentativeParsingAction : public TentativeParsingAction {
1020 public:
1021 explicit UnannotatedTentativeParsingAction(Parser &Self,
1022 tok::TokenKind EndKind)
1023 : TentativeParsingAction(Self), Self(Self), EndKind(EndKind) {
1024 // Stash away the old token stream, so we can restore it once the
1025 // tentative parse is complete.
1026 TentativeParsingAction Inner(Self);
1027 Self.ConsumeAndStoreUntil(EndKind, Toks, true, /*ConsumeFinalToken*/false);
1028 Inner.Revert();
1029 }
1030
1031 void RevertAnnotations() {
1032 Revert();
1033
1034 // Put back the original tokens.
1035 Self.SkipUntil(EndKind, StopAtSemi | StopBeforeMatch);
1036 if (Toks.size()) {
1037 auto Buffer = std::make_unique<Token[]>(Toks.size());
1038 std::copy(Toks.begin() + 1, Toks.end(), Buffer.get());
1039 Buffer[Toks.size() - 1] = Self.Tok;
1040 Self.PP.EnterTokenStream(std::move(Buffer), Toks.size(), true,
1041 /*IsReinject*/ true);
1042
1043 Self.Tok = Toks.front();
1044 }
1045 }
1046
1047 private:
1048 Parser &Self;
1049 CachedTokens Toks;
1050 tok::TokenKind EndKind;
1051 };
1052
1053 /// ConsumeAndStoreInitializer - Consume and store the token at the passed token
1054 /// container until the end of the current initializer expression (either a
1055 /// default argument or an in-class initializer for a non-static data member).
1056 ///
1057 /// Returns \c true if we reached the end of something initializer-shaped,
1058 /// \c false if we bailed out.
1059 bool Parser::ConsumeAndStoreInitializer(CachedTokens &Toks,
1060 CachedInitKind CIK) {
1061 // We always want this function to consume at least one token if not at EOF.
1062 bool IsFirstToken = true;
1063
1064 // Number of possible unclosed <s we've seen so far. These might be templates,
1065 // and might not, but if there were none of them (or we know for sure that
1066 // we're within a template), we can avoid a tentative parse.
1067 unsigned AngleCount = 0;
1068 unsigned KnownTemplateCount = 0;
1069
1070 while (1) {
1071 switch (Tok.getKind()) {
1072 case tok::comma:
1073 // If we might be in a template, perform a tentative parse to check.
1074 if (!AngleCount)
1075 // Not a template argument: this is the end of the initializer.
1076 return true;
1077 if (KnownTemplateCount)
1078 goto consume_token;
1079
1080 // We hit a comma inside angle brackets. This is the hard case. The
1081 // rule we follow is:
1082 // * For a default argument, if the tokens after the comma form a
1083 // syntactically-valid parameter-declaration-clause, in which each
1084 // parameter has an initializer, then this comma ends the default
1085 // argument.
1086 // * For a default initializer, if the tokens after the comma form a
1087 // syntactically-valid init-declarator-list, then this comma ends
1088 // the default initializer.
1089 {
1090 UnannotatedTentativeParsingAction PA(*this,
1091 CIK == CIK_DefaultInitializer
1092 ? tok::semi : tok::r_paren);
1093 Sema::TentativeAnalysisScope Scope(Actions);
1094
1095 TPResult Result = TPResult::Error;
1096 ConsumeToken();
1097 switch (CIK) {
1098 case CIK_DefaultInitializer:
1099 Result = TryParseInitDeclaratorList();
1100 // If we parsed a complete, ambiguous init-declarator-list, this
1101 // is only syntactically-valid if it's followed by a semicolon.
1102 if (Result == TPResult::Ambiguous && Tok.isNot(tok::semi))
1103 Result = TPResult::False;
1104 break;
1105
1106 case CIK_DefaultArgument:
1107 bool InvalidAsDeclaration = false;
1108 Result = TryParseParameterDeclarationClause(
1109 &InvalidAsDeclaration, /*VersusTemplateArg=*/true);
1110 // If this is an expression or a declaration with a missing
1111 // 'typename', assume it's not a declaration.
1112 if (Result == TPResult::Ambiguous && InvalidAsDeclaration)
1113 Result = TPResult::False;
1114 break;
1115 }
1116
1117 // If what follows could be a declaration, it is a declaration.
1118 if (Result != TPResult::False && Result != TPResult::Error) {
1119 PA.Revert();
1120 return true;
1121 }
1122
1123 // In the uncommon case that we decide the following tokens are part
1124 // of a template argument, revert any annotations we've performed in
1125 // those tokens. We're not going to look them up until we've parsed
1126 // the rest of the class, and that might add more declarations.
1127 PA.RevertAnnotations();
1128 }
1129
1130 // Keep going. We know we're inside a template argument list now.
1131 ++KnownTemplateCount;
1132 goto consume_token;
1133
1134 case tok::eof:
1135 case tok::annot_module_begin:
1136 case tok::annot_module_end:
1137 case tok::annot_module_include:
1138 // Ran out of tokens.
1139 return false;
1140
1141 case tok::less:
1142 // FIXME: A '<' can only start a template-id if it's preceded by an
1143 // identifier, an operator-function-id, or a literal-operator-id.
1144 ++AngleCount;
1145 goto consume_token;
1146
1147 case tok::question:
1148 // In 'a ? b : c', 'b' can contain an unparenthesized comma. If it does,
1149 // that is *never* the end of the initializer. Skip to the ':'.
1150 if (!ConsumeAndStoreConditional(Toks))
1151 return false;
1152 break;
1153
1154 case tok::greatergreatergreater:
1155 if (!getLangOpts().CPlusPlus11)
1156 goto consume_token;
1157 if (AngleCount) --AngleCount;
1158 if (KnownTemplateCount) --KnownTemplateCount;
1159 LLVM_FALLTHROUGH;
1160 case tok::greatergreater:
1161 if (!getLangOpts().CPlusPlus11)
1162 goto consume_token;
1163 if (AngleCount) --AngleCount;
1164 if (KnownTemplateCount) --KnownTemplateCount;
1165 LLVM_FALLTHROUGH;
1166 case tok::greater:
1167 if (AngleCount) --AngleCount;
1168 if (KnownTemplateCount) --KnownTemplateCount;
1169 goto consume_token;
1170
1171 case tok::kw_template:
1172 // 'template' identifier '<' is known to start a template argument list,
1173 // and can be used to disambiguate the parse.
1174 // FIXME: Support all forms of 'template' unqualified-id '<'.
1175 Toks.push_back(Tok);
1176 ConsumeToken();
1177 if (Tok.is(tok::identifier)) {
1178 Toks.push_back(Tok);
1179 ConsumeToken();
1180 if (Tok.is(tok::less)) {
1181 ++AngleCount;
1182 ++KnownTemplateCount;
1183 Toks.push_back(Tok);
1184 ConsumeToken();
1185 }
1186 }
1187 break;
1188
1189 case tok::kw_operator:
1190 // If 'operator' precedes other punctuation, that punctuation loses
1191 // its special behavior.
1192 Toks.push_back(Tok);
1193 ConsumeToken();
1194 switch (Tok.getKind()) {
1195 case tok::comma:
1196 case tok::greatergreatergreater:
1197 case tok::greatergreater:
1198 case tok::greater:
1199 case tok::less:
1200 Toks.push_back(Tok);
1201 ConsumeToken();
1202 break;
1203 default:
1204 break;
1205 }
1206 break;
1207
1208 case tok::l_paren:
1209 // Recursively consume properly-nested parens.
1210 Toks.push_back(Tok);
1211 ConsumeParen();
1212 ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false);
1213 break;
1214 case tok::l_square:
1215 // Recursively consume properly-nested square brackets.
1216 Toks.push_back(Tok);
1217 ConsumeBracket();
1218 ConsumeAndStoreUntil(tok::r_square, Toks, /*StopAtSemi=*/false);
1219 break;
1220 case tok::l_brace:
1221 // Recursively consume properly-nested braces.
1222 Toks.push_back(Tok);
1223 ConsumeBrace();
1224 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
1225 break;
1226
1227 // Okay, we found a ']' or '}' or ')', which we think should be balanced.
1228 // Since the user wasn't looking for this token (if they were, it would
1229 // already be handled), this isn't balanced. If there is a LHS token at a
1230 // higher level, we will assume that this matches the unbalanced token
1231 // and return it. Otherwise, this is a spurious RHS token, which we
1232 // consume and pass on to downstream code to diagnose.
1233 case tok::r_paren:
1234 if (CIK == CIK_DefaultArgument)
1235 return true; // End of the default argument.
1236 if (ParenCount && !IsFirstToken)
1237 return false;
1238 Toks.push_back(Tok);
1239 ConsumeParen();
1240 continue;
1241 case tok::r_square:
1242 if (BracketCount && !IsFirstToken)
1243 return false;
1244 Toks.push_back(Tok);
1245 ConsumeBracket();
1246 continue;
1247 case tok::r_brace:
1248 if (BraceCount && !IsFirstToken)
1249 return false;
1250 Toks.push_back(Tok);
1251 ConsumeBrace();
1252 continue;
1253
1254 case tok::code_completion:
1255 Toks.push_back(Tok);
1256 ConsumeCodeCompletionToken();
1257 break;
1258
1259 case tok::string_literal:
1260 case tok::wide_string_literal:
1261 case tok::utf8_string_literal:
1262 case tok::utf16_string_literal:
1263 case tok::utf32_string_literal:
1264 Toks.push_back(Tok);
1265 ConsumeStringToken();
1266 break;
1267 case tok::semi:
1268 if (CIK == CIK_DefaultInitializer)
1269 return true; // End of the default initializer.
1270 LLVM_FALLTHROUGH;
1271 default:
1272 consume_token:
1273 Toks.push_back(Tok);
1274 ConsumeToken();
1275 break;
1276 }
1277 IsFirstToken = false;
1278 }
1279 }
clang::Sema::ActOnFinishDelayedMemberInitializers
void ActOnFinishDelayedMemberInitializers(Decl *Record)
Definition: SemaDeclCXX.cpp:12677
clang::FunctionDecl
Represents a function declaration or definition.
Definition: Decl.h:1783
clang::DiagnosticsEngine::hasErrorOccurred
bool hasErrorOccurred() const
Definition: Diagnostic.h:753
clang::SourceLocation::getLocWithOffset
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
Definition: SourceLocation.h:132
clang::Scope::FunctionPrototypeScope
This is a scope that corresponds to the parameters within a function prototype.
Definition: Scope.h:81
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:97
clang::Sema::ActOnStartDelayedCXXMethodDeclaration
void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method)
ActOnStartDelayedCXXMethodDeclaration - We have completed parsing a top-level (non-nested) C++ class...
Definition: SemaDeclCXX.cpp:9706
clang::Decl
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:88
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:485
clang::Scope::isTemplateParamScope
bool isTemplateParamScope() const
isTemplateParamScope - Return true if this scope is a C++ template parameter scope.
Definition: Scope.h:378
clang::Scope::FnScope
This indicates that the scope corresponds to a function, which means that labels are set here...
Definition: Scope.h:47
clang::Sema::ActOnFinishDelayedCXXMethodDeclaration
void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method)
ActOnFinishDelayedCXXMethodDeclaration - We have finished processing the delayed method declaration f...
Definition: SemaDeclCXX.cpp:9736
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:2282
clang::AccessSpecifier
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:113
clang::Parser
Parser - This implements a parser for the C family of languages.
Definition: Parser.h:57
clang::Sema::ActOnDefaultCtorInitializers
void ActOnDefaultCtorInitializers(Decl *CDtorDecl)
Definition: SemaDeclCXX.cpp:5518
clang::EnterExpressionEvaluationContext
RAII object that enters a new expression evaluation context.
Definition: Sema.h:12029
clang::Sema::ActOnStartDelayedMemberDeclarations
void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record)
Definition: SemaDeclCXX.cpp:9674
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:5616
clang::ParenBraceBracketBalancer
RAII object that makes sure paren/bracket/brace count is correct after declaration/statement parsing...
Definition: RAIIObjectsForParser.h:343
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:13832
clang::CPlusPlus11
Definition: LangStandard.h:48
clang::Token::isAnnotation
bool isAnnotation() const
Return true if this is any of tok::annot_* kind tokens.
Definition: Token.h:120
clang::ParmVarDecl
Represents a parameter to a function.
Definition: Decl.h:1595
clang::index::SymbolKind::Class
clang::Sema::MarkAsLateParsedTemplate
void MarkAsLateParsedTemplate(FunctionDecl *FD, Decl *FnD, CachedTokens &Toks)
Definition: SemaTemplate.cpp:10633
clang::Token::getKind
tok::TokenKind getKind() const
Definition: Token.h:92
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:1118
ParseDiagnostic.h
clang::Qualifiers
The collection of all-type qualifiers we support.
Definition: Type.h:143
clang::Sema::ActOnStartOfFunctionDef
Decl * ActOnStartOfFunctionDef(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParamLists, SkipBodyInfo *SkipBody=nullptr)
Definition: SemaDecl.cpp:13413
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:1784
clang::Parser::TryConsumeToken
bool TryConsumeToken(tok::TokenKind Expected)
Definition: Parser.h:460
clang::ParmVarDecl::setUninstantiatedDefaultArg
void setUninstantiatedDefaultArg(Expr *arg)
Definition: Decl.cpp:2747
clang::ParsingDeclarator::complete
void complete(Decl *D)
Definition: RAIIObjectsForParser.h:221
clang::FDK_Definition
Definition: DeclSpec.h:1744
clang::Decl::IDNS_OrdinaryFriend
This declaration is a friend function.
Definition: DeclBase.h:154
clang::Token
Token - This structure provides full information about a lexed token.
Definition: Token.h:34
clang::Decl::isInIdentifierNamespace
bool isInIdentifierNamespace(unsigned NS) const
Definition: DeclBase.h:803
clang::Token::setKind
void setKind(tok::TokenKind K)
Definition: Token.h:93
clang::diff::Delete
Definition: ASTDiff.h:29
clang::ActionResult::get
PtrTy get() const
Definition: Ownership.h:170
clang::format::FormatToken::isNot
bool isNot(T Kind) const
Definition: FormatToken.h:330
clang::Sema::TentativeAnalysisScope
RAII class used to indicate that we are performing provisional semantic analysis to determine the val...
Definition: Sema.h:8490
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:8166
clang::ParsingDeclarator::getDeclSpec
const ParsingDeclSpec & getDeclSpec() const
Definition: RAIIObjectsForParser.h:208
clang::Scope
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:40
clang::ParmVarDecl::hasUnparsedDefaultArg
bool hasUnparsedDefaultArg() const
Determines whether this parameter has a default argument that has not yet been parsed.
Definition: Decl.h:1709
clang::Parser::ConsumeAnyToken
SourceLocation ConsumeAnyToken(bool ConsumeCodeCompletionTok=false)
ConsumeAnyToken - Dispatch to the right Consume* method based on the current token type...
Definition: Parser.h:480
clang::Sema::ActOnFinishFunctionBody
Decl * ActOnFinishFunctionBody(Decl *Decl, Stmt *Body)
Definition: SemaDecl.cpp:13860
clang::Sema::getDiagnostics
DiagnosticsEngine & getDiagnostics() const
Definition: Sema.h:1328
clang::DeclSpec::hasConstexprSpecifier
bool hasConstexprSpecifier() const
Definition: DeclSpec.h:751
clang::ParsingDeclarator
A class for parsing a declarator.
Definition: RAIIObjectsForParser.h:200
clang::Parser::UnannotatedTentativeParsingAction::UnannotatedTentativeParsingAction
UnannotatedTentativeParsingAction(Parser &Self, tok::TokenKind EndKind)
Definition: ParseCXXInlineMethods.cpp:1021
clang::Sema::ExpressionEvaluationContext::PotentiallyEvaluatedIfUsed
The current expression is potentially evaluated, but any declarations referenced inside that expressi...
llvm::MutableArrayRef
Definition: LLVM.h:32
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:1922
clang::Token::setEofData
void setEofData(const void *D)
Definition: Token.h:196
clang::Token::getLocation
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:126
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:3894
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:9714
clang::Scope::CompoundStmtScope
This is a compound statement scope.
Definition: Scope.h:130
clang::Sema::SetDeclDeleted
void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc)
Definition: SemaDeclCXX.cpp:16285
clang::ActionResult::isInvalid
bool isInvalid() const
Definition: Ownership.h:166
clang::DeclContext::isDependentContext
bool isDependentContext() const
Determines whether this context is dependent on a template parameter.
Definition: DeclBase.cpp:1091
clang::DeclSpec::isFriendSpecified
bool isFriendSpecified() const
Definition: DeclSpec.h:740
clang::ActionResult::isUsable
bool isUsable() const
Definition: Ownership.h:167
clang::ObjCSubstitutionContext::Result
The result type of a method or function.
clang::Parser::getLangOpts
const LangOptions & getLangOpts() const
Definition: Parser.h:407
clang::Scope::FunctionDeclarationScope
This is a scope that corresponds to the parameters within a function prototype for a function declara...
Definition: Scope.h:87
clang::Sema::CheckForFunctionRedefinition
void CheckForFunctionRedefinition(FunctionDecl *FD, const FunctionDecl *EffectiveDefinition=nullptr, SkipBodyInfo *SkipBody=nullptr)
Definition: SemaDecl.cpp:13485
clang::Sema::ActOnSkippedFunctionBody
Decl * ActOnSkippedFunctionBody(Decl *Decl)
Definition: SemaDecl.cpp:13850
clang::Sema::ActOnStartCXXInClassMemberInitializer
void ActOnStartCXXInClassMemberInitializer()
Enter a new C++ default initializer scope.
Definition: SemaDeclCXX.cpp:3865
clang::Parser::StopAtSemi
Stop skipping at semicolon.
Definition: Parser.h:1098
clang::ActionResult
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:153
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:86
clang::Sema::ActOnFinishDelayedMemberDeclarations
void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record)
Definition: SemaDeclCXX.cpp:9681
clang::Declarator::getFunctionDefinitionKind
FunctionDefinitionKind getFunctionDefinitionKind() const
Definition: DeclSpec.h:2553
clang::format::FormatToken::is
bool is(tok::TokenKind Kind) const
Definition: FormatToken.h:314
clang::CXXMethodDecl
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:1931
clang::Sema::SetDeclDefaulted
void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc)
Definition: SemaDeclCXX.cpp:16352
clang::Parser::UnannotatedTentativeParsingAction
A tentative parsing action that can also revert token annotations.
Definition: ParseCXXInlineMethods.cpp:1019
clang::Token::getEofData
const void * getEofData() const
Definition: Token.h:192
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:17259
clang::tok::TokenKind
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:24
llvm::SmallVector< Token, 4 >
clang::VirtSpecifiers
Represents a C++11 virt-specifier-seq.
Definition: DeclSpec.h:2586
clang::Preprocessor::EnterToken
void EnterToken(const Token &Tok, bool IsReinject)
Enters a token in the token stream to be lexed next.
Definition: Preprocessor.h:1480
clang::ParmVarDecl::hasUninstantiatedDefaultArg
bool hasUninstantiatedDefaultArg() const
Definition: Decl.h:1713
clang::Parser::getCurScope
Scope * getCurScope() const
Definition: Parser.h:414
clang::Sema::ActOnFinishInlineFunctionDef
void ActOnFinishInlineFunctionDef(FunctionDecl *D)
Definition: SemaDecl.cpp:13425
clang::Scope::ClassScope
The scope of a struct/union/class definition.
Definition: Scope.h:65
clang::Token::isNot
bool isNot(tok::TokenKind K) const
Definition: Token.h:98
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:21
clang::SourceLocation::isValid
bool isValid() const
Return true if this is a valid SourceLocation object.
Definition: SourceLocation.h:106
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:299
clang::VarDecl::getInit
const Expr * getInit() const
Definition: Decl.h:1229
clang::Scope::TemplateParamScope
This is a scope that corresponds to the template parameters of a C++ template.
Definition: Scope.h:77
RAIIObjectsForParser.h
clang::FunctionDecl::setWillHaveBody
void setWillHaveBody(bool V=true)
Definition: Decl.h:2348
clang::Token::isOneOf
bool isOneOf(tok::TokenKind K1, tok::TokenKind K2) const
Definition: Token.h:99
clang::ParmVarDecl::getUninstantiatedDefaultArg
Expr * getUninstantiatedDefaultArg()
Definition: Decl.cpp:2752
clang::comments::tok::eof
Definition: CommentLexer.h:33
clang::Parser::Diag
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Definition: Parser.cpp:72
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:3154
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:20
clang::Scope::DeclScope
This is a scope that can contain a declaration.
Definition: Scope.h:59
clang::Sema::ActOnParamDefaultArgumentError
void ActOnParamDefaultArgumentError(Decl *param, SourceLocation EqualLoc)
ActOnParamDefaultArgumentError - Parsing or semantic analysis of the default argument for the paramet...
Definition: SemaDeclCXX.cpp:357
clang::Parser::ConsumeToken
SourceLocation ConsumeToken()
ConsumeToken - Consume the current &#39;peek token&#39; and lex the next one.
Definition: Parser.h:452
clang::Sema::ActOnPureSpecifier
void ActOnPureSpecifier(Decl *D, SourceLocation PureSpecLoc)
Definition: SemaDeclCXX.cpp:16631
clang::AttrSyntax::C
clang::Sema::CurContext
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:397
clang::diag::kind
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:60
clang::Token::setLocation
void setLocation(SourceLocation L)
Definition: Token.h:134
clang::SourceRange
A trivial tuple used to represent a source range.
Definition: SourceLocation.h:207
clang::NamedDecl
This represents a decl that may have a name.
Definition: Decl.h:223
clang::Parser::UnannotatedTentativeParsingAction::RevertAnnotations
void RevertAnnotations()
Definition: ParseCXXInlineMethods.cpp:1031
clang::ParsedAttributes
ParsedAttributes - A collection of parsed attributes.
Definition: ParsedAttr.h:824
clang::ICIS_NoInit
No in-class initializer.
Definition: Specifiers.h:259
clang::FunctionTemplateDecl
Declaration of a template function.
Definition: DeclTemplate.h:977
clang::Sema::IsInsideALocalClassWithinATemplateFunction
bool IsInsideALocalClassWithinATemplateFunction()
Definition: SemaTemplate.cpp:10654
clang::Token::startToken
void startToken()
Reset all flags to cleared.
Definition: Token.h:171
clang::Parser::StopBeforeMatch
Stop skipping at specified token, but don&#39;t skip the token itself.
Definition: Parser.h:1100
clang::Sema::ActOnFriendFunctionDecl
NamedDecl * ActOnFriendFunctionDecl(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParams)
Definition: SemaDeclCXX.cpp:15968
clang::Sema::ActOnReenterTemplateScope
unsigned ActOnReenterTemplateScope(Scope *S, Decl *Template)
Definition: SemaDeclCXX.cpp:9623
clang::Token::getEndLoc
SourceLocation getEndLoc() const
Definition: Token.h:153