clang  7.0.0svn
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"
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(
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;
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)) {
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)) {
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 &&
114  !(FnD && FnD->getAsFunction() &&
115  FnD->getAsFunction()->getReturnType()->getContainedAutoType()) &&
116  ((Actions.CurContext->isDependentContext() ||
117  (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
118  TemplateInfo.Kind != ParsedTemplateInfo::ExplicitSpecialization)) &&
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.
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)
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)
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
301 
302  // Introduce the parameters into scope and parse their default
303  // arguments.
304  ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
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();
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.
339  Actions,
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())
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 
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.
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 |
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) ||
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)
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  /*TypeQuals=*/(unsigned)0);
599 
600  for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
601  Class.LateParsedDeclarations[i]->ParseLexedMemberInitializers();
602  }
603  }
604 
605  if (!AlreadyHasClassScope)
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 
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  // FALL THROUGH.
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:
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 
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  {
1043  CIK == CIK_DefaultInitializer
1044  ? tok::semi : tok::r_paren);
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  // Fall through.
1112  case tok::greatergreater:
1113  if (!getLangOpts().CPlusPlus11)
1114  goto consume_token;
1115  if (AngleCount) --AngleCount;
1116  if (KnownTemplateCount) --KnownTemplateCount;
1117  // Fall through.
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  // FALL THROUGH.
1223  default:
1224  consume_token:
1225  Toks.push_back(Tok);
1226  ConsumeToken();
1227  break;
1228  }
1229  IsFirstToken = false;
1230  }
1231 }
void ActOnFinishDelayedMemberInitializers(Decl *Record)
Represents a function declaration or definition.
Definition: Decl.h:1714
bool hasErrorOccurred() const
Definition: Diagnostic.h:746
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
This is a scope that corresponds to the parameters within a function prototype.
Definition: Scope.h:81
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
void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method)
ActOnStartDelayedCXXMethodDeclaration - We have completed parsing a top-level (non-nested) C++ class...
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:86
Defines the C++ template declaration subclasses.
StringRef P
bool isTemplateParamScope() const
isTemplateParamScope - Return true if this scope is a C++ template parameter scope.
Definition: Scope.h:375
This indicates that the scope corresponds to a function, which means that labels are set here...
Definition: Scope.h:47
void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method)
ActOnFinishDelayedCXXMethodDeclaration - We have finished processing the delayed method declaration f...
bool isFunctionDeclarator(unsigned &idx) const
isFunctionDeclarator - This method returns true if the declarator is a function declarator (looking t...
Definition: DeclSpec.h:2221
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:98
Parser - This implements a parser for the C family of languages.
Definition: Parser.h:57
void ActOnDefaultCtorInitializers(Decl *CDtorDecl)
RAII object that enters a new expression evaluation context.
Definition: Sema.h:10733
void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record)
RAII object used to temporarily allow the C++ &#39;this&#39; expression to be used, with the given qualifiers...
Definition: Sema.h:5092
RAII object that makes sure paren/bracket/brace count is correct after declaration/statement parsing...
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:12860
Represents a parameter to a function.
Definition: Decl.h:1533
void MarkAsLateParsedTemplate(FunctionDecl *FD, Decl *FnD, CachedTokens &Toks)
tok::TokenKind getKind() const
Definition: Token.h:90
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:1039
Decl * ActOnStartOfFunctionDef(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParamLists, SkipBodyInfo *SkipBody=nullptr)
Definition: SemaDecl.cpp:12471
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset=0)
Computes the source location just past the end of the token at this source location.
bool TryConsumeToken(tok::TokenKind Expected)
Definition: Parser.h:412
void setUninstantiatedDefaultArg(Expr *arg)
Definition: Decl.cpp:2576
This declaration is a friend function.
Definition: DeclBase.h:152
Token - This structure provides full information about a lexed token.
Definition: Token.h:35
bool isInIdentifierNamespace(unsigned NS) const
Definition: DeclBase.h:801
void setKind(tok::TokenKind K)
Definition: Token.h:91
PtrTy get() const
Definition: Ownership.h:174
bool isNot(T Kind) const
Definition: FormatToken.h:326
RAII class used to indicate that we are performing provisional semantic analysis to determine the val...
Definition: Sema.h:7555
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...
const ParsingDeclSpec & getDeclSpec() const
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:40
bool hasUnparsedDefaultArg() const
Determines whether this parameter has a default argument that has not yet been parsed.
Definition: Decl.h:1643
SourceLocation ConsumeAnyToken(bool ConsumeCodeCompletionTok=false)
ConsumeAnyToken - Dispatch to the right Consume* method based on the current token type...
Definition: Parser.h:432
Decl * ActOnFinishFunctionBody(Decl *Decl, Stmt *Body)
Definition: SemaDecl.cpp:12888
DiagnosticsEngine & getDiagnostics() const
Definition: Sema.h:1208
A class for parsing a declarator.
UnannotatedTentativeParsingAction(Parser &Self, tok::TokenKind EndKind)
The current expression is potentially evaluated, but any declarations referenced inside that expressi...
This file defines the classes used to store parsed information about declaration-specifiers and decla...
void SkipMalformedDecl()
SkipMalformedDecl - Read tokens until we get to some likely good stopping point for skipping past a s...
Definition: ParseDecl.cpp:1825
void setEofData(const void *D)
Definition: Token.h:194
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:124
bool isConstexprSpecified() const
Definition: DeclSpec.h:713
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.
void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param)
ActOnDelayedCXXMethodParameter - We&#39;ve already started a delayed C++ method declaration.
This is a compound statement scope.
Definition: Scope.h:130
void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc)
bool isInvalid() const
Definition: Ownership.h:170
bool isDependentContext() const
Determines whether this context is dependent on a template parameter.
Definition: DeclBase.cpp:1040
bool isFriendSpecified() const
Definition: DeclSpec.h:707
bool isUsable() const
Definition: Ownership.h:171
The result type of a method or function.
const LangOptions & getLangOpts() const
Definition: Parser.h:359
This is a scope that corresponds to the parameters within a function prototype for a function declara...
Definition: Scope.h:87
void CheckForFunctionRedefinition(FunctionDecl *FD, const FunctionDecl *EffectiveDefinition=nullptr, SkipBodyInfo *SkipBody=nullptr)
Definition: SemaDecl.cpp:12543
Decl * ActOnSkippedFunctionBody(Decl *Decl)
Definition: SemaDecl.cpp:12878
void ActOnStartCXXInClassMemberInitializer()
Enter a new C++ default initializer scope.
Stop skipping at semicolon.
Definition: Parser.h:1019
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:157
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:218
Encodes a location in the source.
void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record)
FunctionDefinitionKind getFunctionDefinitionKind() const
Definition: DeclSpec.h:2450
bool is(tok::TokenKind Kind) const
Definition: FormatToken.h:310
void ProcessDeclAttributeList(Scope *S, Decl *D, const ParsedAttributesView &AL, bool IncludeCXX11Attributes=true)
ProcessDeclAttributeList - Apply all the decl attributes in the specified attribute list to the speci...
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:2043
void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc)
A tentative parsing action that can also revert token annotations.
const void * getEofData() const
Definition: Token.h:190
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).
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:25
Represents a C++11 virt-specifier-seq.
Definition: DeclSpec.h:2483
bool hasUninstantiatedDefaultArg() const
Definition: Decl.h:1647
Scope * getCurScope() const
Definition: Parser.h:366
void ActOnFinishInlineFunctionDef(FunctionDecl *D)
Definition: SemaDecl.cpp:12483
The scope of a struct/union/class definition.
Definition: Scope.h:65
bool isNot(tok::TokenKind K) const
Definition: Token.h:96
Dataflow Directional Tag Classes.
bool isValid() const
Return true if this is a valid SourceLocation object.
void ActOnParamDefaultArgument(Decl *param, SourceLocation EqualLoc, Expr *defarg)
ActOnParamDefaultArgument - Check whether the default argument provided for a function parameter is w...
const Expr * getInit() const
Definition: Decl.h:1217
This is a scope that corresponds to the template parameters of a C++ template.
Definition: Scope.h:77
void setWillHaveBody(bool V=true)
Definition: Decl.h:2201
bool isOneOf(tok::TokenKind K1, tok::TokenKind K2) const
Definition: Token.h:97
Expr * getUninstantiatedDefaultArg()
Definition: Decl.cpp:2581
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Definition: Parser.cpp:73
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.
ExprResult ParseAssignmentExpression(TypeCastState isTypeCast=NotTypeCast)
Parse an expr that doesn&#39;t include (top-level) commas.
Definition: ParseExpr.cpp:160
ExceptionSpecificationType
The various types of exception specifications that exist in C++11.
This is a scope that can contain a declaration.
Definition: Scope.h:59
void ActOnParamDefaultArgumentError(Decl *param, SourceLocation EqualLoc)
ActOnParamDefaultArgumentError - Parsing or semantic analysis of the default argument for the paramet...
SourceLocation ConsumeToken()
ConsumeToken - Consume the current &#39;peek token&#39; and lex the next one.
Definition: Parser.h:404
void ActOnPureSpecifier(Decl *D, SourceLocation PureSpecLoc)
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:331
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:61
void setLocation(SourceLocation L)
Definition: Token.h:132
A trivial tuple used to represent a source range.
This represents a decl that may have a name.
Definition: Decl.h:248
ParsedAttributes - A collection of parsed attributes.
Definition: ParsedAttr.h:803
No in-class initializer.
Definition: Specifiers.h:230
Declaration of a template function.
Definition: DeclTemplate.h:968
bool IsInsideALocalClassWithinATemplateFunction()
void startToken()
Reset all flags to cleared.
Definition: Token.h:169
Stop skipping at specified token, but don&#39;t skip the token itself.
Definition: Parser.h:1021
NamedDecl * ActOnFriendFunctionDecl(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParams)
unsigned ActOnReenterTemplateScope(Scope *S, Decl *Template)
SourceLocation getEndLoc() const
Definition: Token.h:151