clang  6.0.0svn
ParseCXXInlineMethods.cpp
Go to the documentation of this file.
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(AccessSpecifier AS,
26  AttributeList *AccessAttrs,
28  const ParsedTemplateInfo &TemplateInfo,
29  const VirtSpecifiers& VS,
30  SourceLocation PureSpecLoc) {
31  assert(D.isFunctionDeclarator() && "This isn't a function declarator!");
32  assert(Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try, tok::equal) &&
33  "Current token not a '{', ':', '=', or 'try'!");
34 
35  MultiTemplateParamsArg TemplateParams(
36  TemplateInfo.TemplateParams ? TemplateInfo.TemplateParams->data()
37  : nullptr,
38  TemplateInfo.TemplateParams ? TemplateInfo.TemplateParams->size() : 0);
39 
40  NamedDecl *FnD;
42  FnD = Actions.ActOnFriendFunctionDecl(getCurScope(), D,
43  TemplateParams);
44  else {
45  FnD = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS, D,
46  TemplateParams, nullptr,
47  VS, ICIS_NoInit);
48  if (FnD) {
49  Actions.ProcessDeclAttributeList(getCurScope(), FnD, AccessAttrs);
50  if (PureSpecLoc.isValid())
51  Actions.ActOnPureSpecifier(FnD, PureSpecLoc);
52  }
53  }
54 
55  if (FnD)
56  HandleMemberFunctionDeclDelays(D, FnD);
57 
58  D.complete(FnD);
59 
60  if (TryConsumeToken(tok::equal)) {
61  if (!FnD) {
62  SkipUntil(tok::semi);
63  return nullptr;
64  }
65 
66  bool Delete = false;
67  SourceLocation KWLoc;
68  SourceLocation KWEndLoc = Tok.getEndLoc().getLocWithOffset(-1);
69  if (TryConsumeToken(tok::kw_delete, KWLoc)) {
71  ? diag::warn_cxx98_compat_defaulted_deleted_function
72  : diag::ext_defaulted_deleted_function)
73  << 1 /* deleted */;
74  Actions.SetDeclDeleted(FnD, KWLoc);
75  Delete = true;
76  if (auto *DeclAsFunction = dyn_cast<FunctionDecl>(FnD)) {
77  DeclAsFunction->setRangeEnd(KWEndLoc);
78  }
79  } else if (TryConsumeToken(tok::kw_default, KWLoc)) {
81  ? diag::warn_cxx98_compat_defaulted_deleted_function
82  : diag::ext_defaulted_deleted_function)
83  << 0 /* defaulted */;
84  Actions.SetDeclDefaulted(FnD, KWLoc);
85  if (auto *DeclAsFunction = dyn_cast<FunctionDecl>(FnD)) {
86  DeclAsFunction->setRangeEnd(KWEndLoc);
87  }
88  } else {
89  llvm_unreachable("function definition after = not 'delete' or 'default'");
90  }
91 
92  if (Tok.is(tok::comma)) {
93  Diag(KWLoc, diag::err_default_delete_in_multiple_declaration)
94  << Delete;
95  SkipUntil(tok::semi);
96  } else if (ExpectAndConsume(tok::semi, diag::err_expected_after,
97  Delete ? "delete" : "default")) {
98  SkipUntil(tok::semi);
99  }
100 
101  return FnD;
102  }
103 
104  if (SkipFunctionBodies && (!FnD || Actions.canSkipFunctionBody(FnD)) &&
105  trySkippingFunctionBody()) {
106  Actions.ActOnSkippedFunctionBody(FnD);
107  return FnD;
108  }
109 
110  // In delayed template parsing mode, if we are within a class template
111  // or if we are about to parse function member template then consume
112  // the tokens and store them for parsing at the end of the translation unit.
113  if (getLangOpts().DelayedTemplateParsing &&
116  !(FnD && FnD->getAsFunction() &&
117  FnD->getAsFunction()->getReturnType()->getContainedAutoType()) &&
118  ((Actions.CurContext->isDependentContext() ||
119  (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
120  TemplateInfo.Kind != ParsedTemplateInfo::ExplicitSpecialization)) &&
122 
123  CachedTokens Toks;
124  LexTemplateFunctionForLateParsing(Toks);
125 
126  if (FnD) {
127  FunctionDecl *FD = FnD->getAsFunction();
128  Actions.CheckForFunctionRedefinition(FD);
129  Actions.MarkAsLateParsedTemplate(FD, FnD, Toks);
130  }
131 
132  return FnD;
133  }
134 
135  // Consume the tokens and store them for later parsing.
136 
137  LexedMethod* LM = new LexedMethod(this, FnD);
138  getCurrentClass().LateParsedDeclarations.push_back(LM);
139  LM->TemplateScope = getCurScope()->isTemplateParamScope();
140  CachedTokens &Toks = LM->Toks;
141 
142  tok::TokenKind kind = Tok.getKind();
143  // Consume everything up to (and including) the left brace of the
144  // function body.
145  if (ConsumeAndStoreFunctionPrologue(Toks)) {
146  // We didn't find the left-brace we expected after the
147  // constructor initializer; we already printed an error, and it's likely
148  // impossible to recover, so don't try to parse this method later.
149  // Skip over the rest of the decl and back to somewhere that looks
150  // reasonable.
152  delete getCurrentClass().LateParsedDeclarations.back();
153  getCurrentClass().LateParsedDeclarations.pop_back();
154  return FnD;
155  } else {
156  // Consume everything up to (and including) the matching right brace.
157  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
158  }
159 
160  // If we're in a function-try-block, we need to store all the catch blocks.
161  if (kind == tok::kw_try) {
162  while (Tok.is(tok::kw_catch)) {
163  ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false);
164  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
165  }
166  }
167 
168  if (FnD) {
169  FunctionDecl *FD = FnD->getAsFunction();
170  // Track that this function will eventually have a body; Sema needs
171  // to know this.
172  Actions.CheckForFunctionRedefinition(FD);
173  FD->setWillHaveBody(true);
174  } else {
175  // If semantic analysis could not build a function declaration,
176  // just throw away the late-parsed declaration.
177  delete getCurrentClass().LateParsedDeclarations.back();
178  getCurrentClass().LateParsedDeclarations.pop_back();
179  }
180 
181  return FnD;
182 }
183 
184 /// ParseCXXNonStaticMemberInitializer - We parsed and verified that the
185 /// specified Declarator is a well formed C++ non-static data member
186 /// declaration. Now lex its initializer and store its tokens for parsing
187 /// after the class is complete.
188 void Parser::ParseCXXNonStaticMemberInitializer(Decl *VarD) {
189  assert(Tok.isOneOf(tok::l_brace, tok::equal) &&
190  "Current token not a '{' or '='!");
191 
192  LateParsedMemberInitializer *MI =
193  new LateParsedMemberInitializer(this, VarD);
194  getCurrentClass().LateParsedDeclarations.push_back(MI);
195  CachedTokens &Toks = MI->Toks;
196 
197  tok::TokenKind kind = Tok.getKind();
198  if (kind == tok::equal) {
199  Toks.push_back(Tok);
200  ConsumeToken();
201  }
202 
203  if (kind == tok::l_brace) {
204  // Begin by storing the '{' token.
205  Toks.push_back(Tok);
206  ConsumeBrace();
207 
208  // Consume everything up to (and including) the matching right brace.
209  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/true);
210  } else {
211  // Consume everything up to (but excluding) the comma or semicolon.
212  ConsumeAndStoreInitializer(Toks, CIK_DefaultInitializer);
213  }
214 
215  // Store an artificial EOF token to ensure that we don't run off the end of
216  // the initializer when we come to parse it.
217  Token Eof;
218  Eof.startToken();
219  Eof.setKind(tok::eof);
220  Eof.setLocation(Tok.getLocation());
221  Eof.setEofData(VarD);
222  Toks.push_back(Eof);
223 }
224 
225 Parser::LateParsedDeclaration::~LateParsedDeclaration() {}
226 void Parser::LateParsedDeclaration::ParseLexedMethodDeclarations() {}
227 void Parser::LateParsedDeclaration::ParseLexedMemberInitializers() {}
228 void Parser::LateParsedDeclaration::ParseLexedMethodDefs() {}
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::LateParsedMethodDeclaration::ParseLexedMethodDeclarations() {
250  Self->ParseLexedMethodDeclaration(*this);
251 }
252 
253 void Parser::LexedMethod::ParseLexedMethodDefs() {
254  Self->ParseLexedMethodDef(*this);
255 }
256 
257 void Parser::LateParsedMemberInitializer::ParseLexedMemberInitializers() {
258  Self->ParseLexedMemberInitializer(*this);
259 }
260 
261 /// ParseLexedMethodDeclarations - We finished parsing the member
262 /// specification of a top (non-nested) C++ class. Now go over the
263 /// stack of method declarations with some parts for which parsing was
264 /// delayed (such as default arguments) and parse them.
265 void Parser::ParseLexedMethodDeclarations(ParsingClass &Class) {
266  bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
267  ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
268  HasTemplateScope);
269  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
270  if (HasTemplateScope) {
271  Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
272  ++CurTemplateDepthTracker;
273  }
274 
275  // The current scope is still active if we're the top-level class.
276  // Otherwise we'll need to push and enter a new scope.
277  bool HasClassScope = !Class.TopLevelClass;
278  ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope,
279  HasClassScope);
280  if (HasClassScope)
282  Class.TagOrTemplate);
283 
284  for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
285  Class.LateParsedDeclarations[i]->ParseLexedMethodDeclarations();
286  }
287 
288  if (HasClassScope)
290  Class.TagOrTemplate);
291 }
292 
293 void Parser::ParseLexedMethodDeclaration(LateParsedMethodDeclaration &LM) {
294  // If this is a member template, introduce the template parameter scope.
295  ParseScope TemplateScope(this, Scope::TemplateParamScope, LM.TemplateScope);
296  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
297  if (LM.TemplateScope) {
298  Actions.ActOnReenterTemplateScope(getCurScope(), LM.Method);
299  ++CurTemplateDepthTracker;
300  }
301  // Start the delayed C++ method declaration
303 
304  // Introduce the parameters into scope and parse their default
305  // arguments.
306  ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
308  for (unsigned I = 0, N = LM.DefaultArgs.size(); I != N; ++I) {
309  auto Param = cast<ParmVarDecl>(LM.DefaultArgs[I].Param);
310  // Introduce the parameter into scope.
311  bool HasUnparsed = Param->hasUnparsedDefaultArg();
313  std::unique_ptr<CachedTokens> Toks = std::move(LM.DefaultArgs[I].Toks);
314  if (Toks) {
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  // Add the 'stop' token.
388  Token LastExceptionSpecToken = Toks->back();
389  Token ExceptionSpecEnd;
390  ExceptionSpecEnd.startToken();
391  ExceptionSpecEnd.setKind(tok::eof);
392  ExceptionSpecEnd.setLocation(LastExceptionSpecToken.getEndLoc());
393  ExceptionSpecEnd.setEofData(LM.Method);
394  Toks->push_back(ExceptionSpecEnd);
395 
396  // Parse the default argument from its saved token stream.
397  Toks->push_back(Tok); // So that the current token doesn't get lost
398  PP.EnterTokenStream(*Toks, true);
399 
400  // Consume the previously-pushed token.
401  ConsumeAnyToken();
402 
403  // C++11 [expr.prim.general]p3:
404  // If a declaration declares a member function or member function
405  // template of a class X, the expression this is a prvalue of type
406  // "pointer to cv-qualifier-seq X" between the optional cv-qualifer-seq
407  // and the end of the function-definition, member-declarator, or
408  // declarator.
409  CXXMethodDecl *Method;
410  if (FunctionTemplateDecl *FunTmpl
411  = dyn_cast<FunctionTemplateDecl>(LM.Method))
412  Method = cast<CXXMethodDecl>(FunTmpl->getTemplatedDecl());
413  else
414  Method = cast<CXXMethodDecl>(LM.Method);
415 
416  Sema::CXXThisScopeRAII ThisScope(Actions, Method->getParent(),
417  Method->getTypeQualifiers(),
418  getLangOpts().CPlusPlus11);
419 
420  // Parse the exception-specification.
421  SourceRange SpecificationRange;
422  SmallVector<ParsedType, 4> DynamicExceptions;
423  SmallVector<SourceRange, 4> DynamicExceptionRanges;
424  ExprResult NoexceptExpr;
425  CachedTokens *ExceptionSpecTokens;
426 
428  = tryParseExceptionSpecification(/*Delayed=*/false, SpecificationRange,
429  DynamicExceptions,
430  DynamicExceptionRanges, NoexceptExpr,
431  ExceptionSpecTokens);
432 
433  if (Tok.isNot(tok::eof) || Tok.getEofData() != LM.Method)
434  Diag(Tok.getLocation(), diag::err_except_spec_unparsed);
435 
436  // Attach the exception-specification to the method.
437  Actions.actOnDelayedExceptionSpecification(LM.Method, EST,
438  SpecificationRange,
439  DynamicExceptions,
440  DynamicExceptionRanges,
441  NoexceptExpr.isUsable()?
442  NoexceptExpr.get() : nullptr);
443 
444  // There could be leftover tokens (e.g. because of an error).
445  // Skip through until we reach the original token position.
446  while (Tok.isNot(tok::eof))
447  ConsumeAnyToken();
448 
449  // Clean up the remaining EOF token.
450  if (Tok.is(tok::eof) && Tok.getEofData() == LM.Method)
451  ConsumeAnyToken();
452 
453  delete Toks;
454  LM.ExceptionSpecTokens = nullptr;
455  }
456 
457  PrototypeScope.Exit();
458 
459  // Finish the delayed C++ method declaration.
461 }
462 
463 /// ParseLexedMethodDefs - We finished parsing the member specification of a top
464 /// (non-nested) C++ class. Now go over the stack of lexed methods that were
465 /// collected during its parsing and parse them all.
466 void Parser::ParseLexedMethodDefs(ParsingClass &Class) {
467  bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
468  ParseScope ClassTemplateScope(this, Scope::TemplateParamScope, HasTemplateScope);
469  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
470  if (HasTemplateScope) {
471  Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
472  ++CurTemplateDepthTracker;
473  }
474  bool HasClassScope = !Class.TopLevelClass;
475  ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope,
476  HasClassScope);
477 
478  for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
479  Class.LateParsedDeclarations[i]->ParseLexedMethodDefs();
480  }
481 }
482 
483 void Parser::ParseLexedMethodDef(LexedMethod &LM) {
484  // If this is a member template, introduce the template parameter scope.
485  ParseScope TemplateScope(this, Scope::TemplateParamScope, LM.TemplateScope);
486  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
487  if (LM.TemplateScope) {
488  Actions.ActOnReenterTemplateScope(getCurScope(), LM.D);
489  ++CurTemplateDepthTracker;
490  }
491 
492  assert(!LM.Toks.empty() && "Empty body!");
493  Token LastBodyToken = LM.Toks.back();
494  Token BodyEnd;
495  BodyEnd.startToken();
496  BodyEnd.setKind(tok::eof);
497  BodyEnd.setLocation(LastBodyToken.getEndLoc());
498  BodyEnd.setEofData(LM.D);
499  LM.Toks.push_back(BodyEnd);
500  // Append the current token at the end of the new token stream so that it
501  // doesn't get lost.
502  LM.Toks.push_back(Tok);
503  PP.EnterTokenStream(LM.Toks, true);
504 
505  // Consume the previously pushed token.
506  ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
507  assert(Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try)
508  && "Inline method not starting with '{', ':' or 'try'");
509 
510  // Parse the method body. Function body parsing code is similar enough
511  // to be re-used for method bodies as well.
512  ParseScope FnScope(this, Scope::FnScope | Scope::DeclScope |
514  Actions.ActOnStartOfFunctionDef(getCurScope(), LM.D);
515 
516  if (Tok.is(tok::kw_try)) {
517  ParseFunctionTryBlock(LM.D, FnScope);
518 
519  while (Tok.isNot(tok::eof))
520  ConsumeAnyToken();
521 
522  if (Tok.is(tok::eof) && Tok.getEofData() == LM.D)
523  ConsumeAnyToken();
524  return;
525  }
526  if (Tok.is(tok::colon)) {
527  ParseConstructorInitializer(LM.D);
528 
529  // Error recovery.
530  if (!Tok.is(tok::l_brace)) {
531  FnScope.Exit();
532  Actions.ActOnFinishFunctionBody(LM.D, nullptr);
533 
534  while (Tok.isNot(tok::eof))
535  ConsumeAnyToken();
536 
537  if (Tok.is(tok::eof) && Tok.getEofData() == LM.D)
538  ConsumeAnyToken();
539  return;
540  }
541  } else
542  Actions.ActOnDefaultCtorInitializers(LM.D);
543 
544  assert((Actions.getDiagnostics().hasErrorOccurred() ||
545  !isa<FunctionTemplateDecl>(LM.D) ||
546  cast<FunctionTemplateDecl>(LM.D)->getTemplateParameters()->getDepth()
547  < TemplateParameterDepth) &&
548  "TemplateParameterDepth should be greater than the depth of "
549  "current template being instantiated!");
550 
551  ParseFunctionStatementBody(LM.D, FnScope);
552 
553  while (Tok.isNot(tok::eof))
554  ConsumeAnyToken();
555 
556  if (Tok.is(tok::eof) && Tok.getEofData() == LM.D)
557  ConsumeAnyToken();
558 
559  if (auto *FD = dyn_cast_or_null<FunctionDecl>(LM.D))
560  if (isa<CXXMethodDecl>(FD) ||
562  Actions.ActOnFinishInlineFunctionDef(FD);
563 }
564 
565 /// ParseLexedMemberInitializers - We finished parsing the member specification
566 /// of a top (non-nested) C++ class. Now go over the stack of lexed data member
567 /// initializers that were collected during its parsing and parse them all.
568 void Parser::ParseLexedMemberInitializers(ParsingClass &Class) {
569  bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
570  ParseScope ClassTemplateScope(this, Scope::TemplateParamScope,
571  HasTemplateScope);
572  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
573  if (HasTemplateScope) {
574  Actions.ActOnReenterTemplateScope(getCurScope(), Class.TagOrTemplate);
575  ++CurTemplateDepthTracker;
576  }
577  // Set or update the scope flags.
578  bool AlreadyHasClassScope = Class.TopLevelClass;
579  unsigned ScopeFlags = Scope::ClassScope|Scope::DeclScope;
580  ParseScope ClassScope(this, ScopeFlags, !AlreadyHasClassScope);
581  ParseScopeFlags ClassScopeFlags(this, ScopeFlags, AlreadyHasClassScope);
582 
583  if (!AlreadyHasClassScope)
585  Class.TagOrTemplate);
586 
587  if (!Class.LateParsedDeclarations.empty()) {
588  // C++11 [expr.prim.general]p4:
589  // Otherwise, if a member-declarator declares a non-static data member
590  // (9.2) of a class X, the expression this is a prvalue of type "pointer
591  // to X" within the optional brace-or-equal-initializer. It shall not
592  // appear elsewhere in the member-declarator.
593  Sema::CXXThisScopeRAII ThisScope(Actions, Class.TagOrTemplate,
594  /*TypeQuals=*/(unsigned)0);
595 
596  for (size_t i = 0; i < Class.LateParsedDeclarations.size(); ++i) {
597  Class.LateParsedDeclarations[i]->ParseLexedMemberInitializers();
598  }
599  }
600 
601  if (!AlreadyHasClassScope)
603  Class.TagOrTemplate);
604 
605  Actions.ActOnFinishDelayedMemberInitializers(Class.TagOrTemplate);
606 }
607 
608 void Parser::ParseLexedMemberInitializer(LateParsedMemberInitializer &MI) {
609  if (!MI.Field || MI.Field->isInvalidDecl())
610  return;
611 
612  // Append the current token at the end of the new token stream so that it
613  // doesn't get lost.
614  MI.Toks.push_back(Tok);
615  PP.EnterTokenStream(MI.Toks, true);
616 
617  // Consume the previously pushed token.
618  ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
619 
620  SourceLocation EqualLoc;
621 
623 
624  ExprResult Init = ParseCXXMemberInitializer(MI.Field, /*IsFunction=*/false,
625  EqualLoc);
626 
627  Actions.ActOnFinishCXXInClassMemberInitializer(MI.Field, EqualLoc,
628  Init.get());
629 
630  // The next token should be our artificial terminating EOF token.
631  if (Tok.isNot(tok::eof)) {
632  if (!Init.isInvalid()) {
633  SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation);
634  if (!EndLoc.isValid())
635  EndLoc = Tok.getLocation();
636  // No fixit; we can't recover as if there were a semicolon here.
637  Diag(EndLoc, diag::err_expected_semi_decl_list);
638  }
639 
640  // Consume tokens until we hit the artificial EOF.
641  while (Tok.isNot(tok::eof))
642  ConsumeAnyToken();
643  }
644  // Make sure this is *our* artificial EOF token.
645  if (Tok.getEofData() == MI.Field)
646  ConsumeAnyToken();
647 }
648 
649 /// ConsumeAndStoreUntil - Consume and store the token at the passed token
650 /// container until the token 'T' is reached (which gets
651 /// consumed/stored too, if ConsumeFinalToken).
652 /// If StopAtSemi is true, then we will stop early at a ';' character.
653 /// Returns true if token 'T1' or 'T2' was found.
654 /// NOTE: This is a specialized version of Parser::SkipUntil.
655 bool Parser::ConsumeAndStoreUntil(tok::TokenKind T1, tok::TokenKind T2,
656  CachedTokens &Toks,
657  bool StopAtSemi, bool ConsumeFinalToken) {
658  // We always want this function to consume at least one token if the first
659  // token isn't T and if not at EOF.
660  bool isFirstTokenConsumed = true;
661  while (1) {
662  // If we found one of the tokens, stop and return true.
663  if (Tok.is(T1) || Tok.is(T2)) {
664  if (ConsumeFinalToken) {
665  Toks.push_back(Tok);
666  ConsumeAnyToken();
667  }
668  return true;
669  }
670 
671  switch (Tok.getKind()) {
672  case tok::eof:
673  case tok::annot_module_begin:
674  case tok::annot_module_end:
675  case tok::annot_module_include:
676  // Ran out of tokens.
677  return false;
678 
679  case tok::l_paren:
680  // Recursively consume properly-nested parens.
681  Toks.push_back(Tok);
682  ConsumeParen();
683  ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false);
684  break;
685  case tok::l_square:
686  // Recursively consume properly-nested square brackets.
687  Toks.push_back(Tok);
688  ConsumeBracket();
689  ConsumeAndStoreUntil(tok::r_square, Toks, /*StopAtSemi=*/false);
690  break;
691  case tok::l_brace:
692  // Recursively consume properly-nested braces.
693  Toks.push_back(Tok);
694  ConsumeBrace();
695  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
696  break;
697 
698  // Okay, we found a ']' or '}' or ')', which we think should be balanced.
699  // Since the user wasn't looking for this token (if they were, it would
700  // already be handled), this isn't balanced. If there is a LHS token at a
701  // higher level, we will assume that this matches the unbalanced token
702  // and return it. Otherwise, this is a spurious RHS token, which we skip.
703  case tok::r_paren:
704  if (ParenCount && !isFirstTokenConsumed)
705  return false; // Matches something.
706  Toks.push_back(Tok);
707  ConsumeParen();
708  break;
709  case tok::r_square:
710  if (BracketCount && !isFirstTokenConsumed)
711  return false; // Matches something.
712  Toks.push_back(Tok);
713  ConsumeBracket();
714  break;
715  case tok::r_brace:
716  if (BraceCount && !isFirstTokenConsumed)
717  return false; // Matches something.
718  Toks.push_back(Tok);
719  ConsumeBrace();
720  break;
721 
722  case tok::semi:
723  if (StopAtSemi)
724  return false;
725  // FALL THROUGH.
726  default:
727  // consume this token.
728  Toks.push_back(Tok);
729  ConsumeAnyToken(/*ConsumeCodeCompletionTok*/true);
730  break;
731  }
732  isFirstTokenConsumed = false;
733  }
734 }
735 
736 /// \brief Consume tokens and store them in the passed token container until
737 /// we've passed the try keyword and constructor initializers and have consumed
738 /// the opening brace of the function body. The opening brace will be consumed
739 /// if and only if there was no error.
740 ///
741 /// \return True on error.
742 bool Parser::ConsumeAndStoreFunctionPrologue(CachedTokens &Toks) {
743  if (Tok.is(tok::kw_try)) {
744  Toks.push_back(Tok);
745  ConsumeToken();
746  }
747 
748  if (Tok.isNot(tok::colon)) {
749  // Easy case, just a function body.
750 
751  // Grab any remaining garbage to be diagnosed later. We stop when we reach a
752  // brace: an opening one is the function body, while a closing one probably
753  // means we've reached the end of the class.
754  ConsumeAndStoreUntil(tok::l_brace, tok::r_brace, Toks,
755  /*StopAtSemi=*/true,
756  /*ConsumeFinalToken=*/false);
757  if (Tok.isNot(tok::l_brace))
758  return Diag(Tok.getLocation(), diag::err_expected) << tok::l_brace;
759 
760  Toks.push_back(Tok);
761  ConsumeBrace();
762  return false;
763  }
764 
765  Toks.push_back(Tok);
766  ConsumeToken();
767 
768  // We can't reliably skip over a mem-initializer-id, because it could be
769  // a template-id involving not-yet-declared names. Given:
770  //
771  // S ( ) : a < b < c > ( e )
772  //
773  // 'e' might be an initializer or part of a template argument, depending
774  // on whether 'b' is a template.
775 
776  // Track whether we might be inside a template argument. We can give
777  // significantly better diagnostics if we know that we're not.
778  bool MightBeTemplateArgument = false;
779 
780  while (true) {
781  // Skip over the mem-initializer-id, if possible.
782  if (Tok.is(tok::kw_decltype)) {
783  Toks.push_back(Tok);
784  SourceLocation OpenLoc = ConsumeToken();
785  if (Tok.isNot(tok::l_paren))
786  return Diag(Tok.getLocation(), diag::err_expected_lparen_after)
787  << "decltype";
788  Toks.push_back(Tok);
789  ConsumeParen();
790  if (!ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/true)) {
791  Diag(Tok.getLocation(), diag::err_expected) << tok::r_paren;
792  Diag(OpenLoc, diag::note_matching) << tok::l_paren;
793  return true;
794  }
795  }
796  do {
797  // Walk over a component of a nested-name-specifier.
798  if (Tok.is(tok::coloncolon)) {
799  Toks.push_back(Tok);
800  ConsumeToken();
801 
802  if (Tok.is(tok::kw_template)) {
803  Toks.push_back(Tok);
804  ConsumeToken();
805  }
806  }
807 
808  if (Tok.is(tok::identifier)) {
809  Toks.push_back(Tok);
810  ConsumeToken();
811  } else {
812  break;
813  }
814  } while (Tok.is(tok::coloncolon));
815 
816  if (Tok.is(tok::code_completion)) {
817  Toks.push_back(Tok);
818  ConsumeCodeCompletionToken();
819  if (Tok.isOneOf(tok::identifier, tok::coloncolon, tok::kw_decltype)) {
820  // Could be the start of another member initializer (the ',' has not
821  // been written yet)
822  continue;
823  }
824  }
825 
826  if (Tok.is(tok::comma)) {
827  // The initialization is missing, we'll diagnose it later.
828  Toks.push_back(Tok);
829  ConsumeToken();
830  continue;
831  }
832  if (Tok.is(tok::less))
833  MightBeTemplateArgument = true;
834 
835  if (MightBeTemplateArgument) {
836  // We may be inside a template argument list. Grab up to the start of the
837  // next parenthesized initializer or braced-init-list. This *might* be the
838  // initializer, or it might be a subexpression in the template argument
839  // list.
840  // FIXME: Count angle brackets, and clear MightBeTemplateArgument
841  // if all angles are closed.
842  if (!ConsumeAndStoreUntil(tok::l_paren, tok::l_brace, Toks,
843  /*StopAtSemi=*/true,
844  /*ConsumeFinalToken=*/false)) {
845  // We're not just missing the initializer, we're also missing the
846  // function body!
847  return Diag(Tok.getLocation(), diag::err_expected) << tok::l_brace;
848  }
849  } else if (Tok.isNot(tok::l_paren) && Tok.isNot(tok::l_brace)) {
850  // We found something weird in a mem-initializer-id.
851  if (getLangOpts().CPlusPlus11)
852  return Diag(Tok.getLocation(), diag::err_expected_either)
853  << tok::l_paren << tok::l_brace;
854  else
855  return Diag(Tok.getLocation(), diag::err_expected) << tok::l_paren;
856  }
857 
858  tok::TokenKind kind = Tok.getKind();
859  Toks.push_back(Tok);
860  bool IsLParen = (kind == tok::l_paren);
861  SourceLocation OpenLoc = Tok.getLocation();
862 
863  if (IsLParen) {
864  ConsumeParen();
865  } else {
866  assert(kind == tok::l_brace && "Must be left paren or brace here.");
867  ConsumeBrace();
868  // In C++03, this has to be the start of the function body, which
869  // means the initializer is malformed; we'll diagnose it later.
870  if (!getLangOpts().CPlusPlus11)
871  return false;
872 
873  const Token &PreviousToken = Toks[Toks.size() - 2];
874  if (!MightBeTemplateArgument &&
875  !PreviousToken.isOneOf(tok::identifier, tok::greater,
876  tok::greatergreater)) {
877  // If the opening brace is not preceded by one of these tokens, we are
878  // missing the mem-initializer-id. In order to recover better, we need
879  // to use heuristics to determine if this '{' is most likely the
880  // beginning of a brace-init-list or the function body.
881  // Check the token after the corresponding '}'.
882  TentativeParsingAction PA(*this);
883  if (SkipUntil(tok::r_brace) &&
884  !Tok.isOneOf(tok::comma, tok::ellipsis, tok::l_brace)) {
885  // Consider there was a malformed initializer and this is the start
886  // of the function body. We'll diagnose it later.
887  PA.Revert();
888  return false;
889  }
890  PA.Revert();
891  }
892  }
893 
894  // Grab the initializer (or the subexpression of the template argument).
895  // FIXME: If we support lambdas here, we'll need to set StopAtSemi to false
896  // if we might be inside the braces of a lambda-expression.
897  tok::TokenKind CloseKind = IsLParen ? tok::r_paren : tok::r_brace;
898  if (!ConsumeAndStoreUntil(CloseKind, Toks, /*StopAtSemi=*/true)) {
899  Diag(Tok, diag::err_expected) << CloseKind;
900  Diag(OpenLoc, diag::note_matching) << kind;
901  return true;
902  }
903 
904  // Grab pack ellipsis, if present.
905  if (Tok.is(tok::ellipsis)) {
906  Toks.push_back(Tok);
907  ConsumeToken();
908  }
909 
910  // If we know we just consumed a mem-initializer, we must have ',' or '{'
911  // next.
912  if (Tok.is(tok::comma)) {
913  Toks.push_back(Tok);
914  ConsumeToken();
915  } else if (Tok.is(tok::l_brace)) {
916  // This is the function body if the ')' or '}' is immediately followed by
917  // a '{'. That cannot happen within a template argument, apart from the
918  // case where a template argument contains a compound literal:
919  //
920  // S ( ) : a < b < c > ( d ) { }
921  // // End of declaration, or still inside the template argument?
922  //
923  // ... and the case where the template argument contains a lambda:
924  //
925  // S ( ) : a < 0 && b < c > ( d ) + [ ] ( ) { return 0; }
926  // ( ) > ( ) { }
927  //
928  // FIXME: Disambiguate these cases. Note that the latter case is probably
929  // going to be made ill-formed by core issue 1607.
930  Toks.push_back(Tok);
931  ConsumeBrace();
932  return false;
933  } else if (!MightBeTemplateArgument) {
934  return Diag(Tok.getLocation(), diag::err_expected_either) << tok::l_brace
935  << tok::comma;
936  }
937  }
938 }
939 
940 /// \brief Consume and store tokens from the '?' to the ':' in a conditional
941 /// expression.
942 bool Parser::ConsumeAndStoreConditional(CachedTokens &Toks) {
943  // Consume '?'.
944  assert(Tok.is(tok::question));
945  Toks.push_back(Tok);
946  ConsumeToken();
947 
948  while (Tok.isNot(tok::colon)) {
949  if (!ConsumeAndStoreUntil(tok::question, tok::colon, Toks,
950  /*StopAtSemi=*/true,
951  /*ConsumeFinalToken=*/false))
952  return false;
953 
954  // If we found a nested conditional, consume it.
955  if (Tok.is(tok::question) && !ConsumeAndStoreConditional(Toks))
956  return false;
957  }
958 
959  // Consume ':'.
960  Toks.push_back(Tok);
961  ConsumeToken();
962  return true;
963 }
964 
965 /// \brief A tentative parsing action that can also revert token annotations.
966 class Parser::UnannotatedTentativeParsingAction : public TentativeParsingAction {
967 public:
969  tok::TokenKind EndKind)
970  : TentativeParsingAction(Self), Self(Self), EndKind(EndKind) {
971  // Stash away the old token stream, so we can restore it once the
972  // tentative parse is complete.
973  TentativeParsingAction Inner(Self);
974  Self.ConsumeAndStoreUntil(EndKind, Toks, true, /*ConsumeFinalToken*/false);
975  Inner.Revert();
976  }
977 
979  Revert();
980 
981  // Put back the original tokens.
982  Self.SkipUntil(EndKind, StopAtSemi | StopBeforeMatch);
983  if (Toks.size()) {
984  auto Buffer = llvm::make_unique<Token[]>(Toks.size());
985  std::copy(Toks.begin() + 1, Toks.end(), Buffer.get());
986  Buffer[Toks.size() - 1] = Self.Tok;
987  Self.PP.EnterTokenStream(std::move(Buffer), Toks.size(), true);
988 
989  Self.Tok = Toks.front();
990  }
991  }
992 
993 private:
994  Parser &Self;
995  CachedTokens Toks;
996  tok::TokenKind EndKind;
997 };
998 
999 /// ConsumeAndStoreInitializer - Consume and store the token at the passed token
1000 /// container until the end of the current initializer expression (either a
1001 /// default argument or an in-class initializer for a non-static data member).
1002 ///
1003 /// Returns \c true if we reached the end of something initializer-shaped,
1004 /// \c false if we bailed out.
1005 bool Parser::ConsumeAndStoreInitializer(CachedTokens &Toks,
1006  CachedInitKind CIK) {
1007  // We always want this function to consume at least one token if not at EOF.
1008  bool IsFirstToken = true;
1009 
1010  // Number of possible unclosed <s we've seen so far. These might be templates,
1011  // and might not, but if there were none of them (or we know for sure that
1012  // we're within a template), we can avoid a tentative parse.
1013  unsigned AngleCount = 0;
1014  unsigned KnownTemplateCount = 0;
1015 
1016  while (1) {
1017  switch (Tok.getKind()) {
1018  case tok::comma:
1019  // If we might be in a template, perform a tentative parse to check.
1020  if (!AngleCount)
1021  // Not a template argument: this is the end of the initializer.
1022  return true;
1023  if (KnownTemplateCount)
1024  goto consume_token;
1025 
1026  // We hit a comma inside angle brackets. This is the hard case. The
1027  // rule we follow is:
1028  // * For a default argument, if the tokens after the comma form a
1029  // syntactically-valid parameter-declaration-clause, in which each
1030  // parameter has an initializer, then this comma ends the default
1031  // argument.
1032  // * For a default initializer, if the tokens after the comma form a
1033  // syntactically-valid init-declarator-list, then this comma ends
1034  // the default initializer.
1035  {
1037  CIK == CIK_DefaultInitializer
1038  ? tok::semi : tok::r_paren);
1040 
1041  TPResult Result = TPResult::Error;
1042  ConsumeToken();
1043  switch (CIK) {
1044  case CIK_DefaultInitializer:
1045  Result = TryParseInitDeclaratorList();
1046  // If we parsed a complete, ambiguous init-declarator-list, this
1047  // is only syntactically-valid if it's followed by a semicolon.
1048  if (Result == TPResult::Ambiguous && Tok.isNot(tok::semi))
1049  Result = TPResult::False;
1050  break;
1051 
1052  case CIK_DefaultArgument:
1053  bool InvalidAsDeclaration = false;
1054  Result = TryParseParameterDeclarationClause(
1055  &InvalidAsDeclaration, /*VersusTemplateArgument=*/true);
1056  // If this is an expression or a declaration with a missing
1057  // 'typename', assume it's not a declaration.
1058  if (Result == TPResult::Ambiguous && InvalidAsDeclaration)
1059  Result = TPResult::False;
1060  break;
1061  }
1062 
1063  // If what follows could be a declaration, it is a declaration.
1064  if (Result != TPResult::False && Result != TPResult::Error) {
1065  PA.Revert();
1066  return true;
1067  }
1068 
1069  // In the uncommon case that we decide the following tokens are part
1070  // of a template argument, revert any annotations we've performed in
1071  // those tokens. We're not going to look them up until we've parsed
1072  // the rest of the class, and that might add more declarations.
1073  PA.RevertAnnotations();
1074  }
1075 
1076  // Keep going. We know we're inside a template argument list now.
1077  ++KnownTemplateCount;
1078  goto consume_token;
1079 
1080  case tok::eof:
1081  case tok::annot_module_begin:
1082  case tok::annot_module_end:
1083  case tok::annot_module_include:
1084  // Ran out of tokens.
1085  return false;
1086 
1087  case tok::less:
1088  // FIXME: A '<' can only start a template-id if it's preceded by an
1089  // identifier, an operator-function-id, or a literal-operator-id.
1090  ++AngleCount;
1091  goto consume_token;
1092 
1093  case tok::question:
1094  // In 'a ? b : c', 'b' can contain an unparenthesized comma. If it does,
1095  // that is *never* the end of the initializer. Skip to the ':'.
1096  if (!ConsumeAndStoreConditional(Toks))
1097  return false;
1098  break;
1099 
1100  case tok::greatergreatergreater:
1101  if (!getLangOpts().CPlusPlus11)
1102  goto consume_token;
1103  if (AngleCount) --AngleCount;
1104  if (KnownTemplateCount) --KnownTemplateCount;
1105  // Fall through.
1106  case tok::greatergreater:
1107  if (!getLangOpts().CPlusPlus11)
1108  goto consume_token;
1109  if (AngleCount) --AngleCount;
1110  if (KnownTemplateCount) --KnownTemplateCount;
1111  // Fall through.
1112  case tok::greater:
1113  if (AngleCount) --AngleCount;
1114  if (KnownTemplateCount) --KnownTemplateCount;
1115  goto consume_token;
1116 
1117  case tok::kw_template:
1118  // 'template' identifier '<' is known to start a template argument list,
1119  // and can be used to disambiguate the parse.
1120  // FIXME: Support all forms of 'template' unqualified-id '<'.
1121  Toks.push_back(Tok);
1122  ConsumeToken();
1123  if (Tok.is(tok::identifier)) {
1124  Toks.push_back(Tok);
1125  ConsumeToken();
1126  if (Tok.is(tok::less)) {
1127  ++AngleCount;
1128  ++KnownTemplateCount;
1129  Toks.push_back(Tok);
1130  ConsumeToken();
1131  }
1132  }
1133  break;
1134 
1135  case tok::kw_operator:
1136  // If 'operator' precedes other punctuation, that punctuation loses
1137  // its special behavior.
1138  Toks.push_back(Tok);
1139  ConsumeToken();
1140  switch (Tok.getKind()) {
1141  case tok::comma:
1142  case tok::greatergreatergreater:
1143  case tok::greatergreater:
1144  case tok::greater:
1145  case tok::less:
1146  Toks.push_back(Tok);
1147  ConsumeToken();
1148  break;
1149  default:
1150  break;
1151  }
1152  break;
1153 
1154  case tok::l_paren:
1155  // Recursively consume properly-nested parens.
1156  Toks.push_back(Tok);
1157  ConsumeParen();
1158  ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false);
1159  break;
1160  case tok::l_square:
1161  // Recursively consume properly-nested square brackets.
1162  Toks.push_back(Tok);
1163  ConsumeBracket();
1164  ConsumeAndStoreUntil(tok::r_square, Toks, /*StopAtSemi=*/false);
1165  break;
1166  case tok::l_brace:
1167  // Recursively consume properly-nested braces.
1168  Toks.push_back(Tok);
1169  ConsumeBrace();
1170  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
1171  break;
1172 
1173  // Okay, we found a ']' or '}' or ')', which we think should be balanced.
1174  // Since the user wasn't looking for this token (if they were, it would
1175  // already be handled), this isn't balanced. If there is a LHS token at a
1176  // higher level, we will assume that this matches the unbalanced token
1177  // and return it. Otherwise, this is a spurious RHS token, which we
1178  // consume and pass on to downstream code to diagnose.
1179  case tok::r_paren:
1180  if (CIK == CIK_DefaultArgument)
1181  return true; // End of the default argument.
1182  if (ParenCount && !IsFirstToken)
1183  return false;
1184  Toks.push_back(Tok);
1185  ConsumeParen();
1186  continue;
1187  case tok::r_square:
1188  if (BracketCount && !IsFirstToken)
1189  return false;
1190  Toks.push_back(Tok);
1191  ConsumeBracket();
1192  continue;
1193  case tok::r_brace:
1194  if (BraceCount && !IsFirstToken)
1195  return false;
1196  Toks.push_back(Tok);
1197  ConsumeBrace();
1198  continue;
1199 
1200  case tok::code_completion:
1201  Toks.push_back(Tok);
1202  ConsumeCodeCompletionToken();
1203  break;
1204 
1205  case tok::string_literal:
1206  case tok::wide_string_literal:
1207  case tok::utf8_string_literal:
1208  case tok::utf16_string_literal:
1209  case tok::utf32_string_literal:
1210  Toks.push_back(Tok);
1211  ConsumeStringToken();
1212  break;
1213  case tok::semi:
1214  if (CIK == CIK_DefaultInitializer)
1215  return true; // End of the default initializer.
1216  // FALL THROUGH.
1217  default:
1218  consume_token:
1219  Toks.push_back(Tok);
1220  ConsumeToken();
1221  break;
1222  }
1223  IsFirstToken = false;
1224  }
1225 }
void ActOnFinishDelayedMemberInitializers(Decl *Record)
An instance of this class is created to represent a function declaration or definition.
Definition: Decl.h:1697
bool hasErrorOccurred() const
Definition: Diagnostic.h:662
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:80
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:371
This indicates that the scope corresponds to a function, which means that labels are set here...
Definition: Scope.h:46
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:2201
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:95
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:10632
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:5040
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:12171
ParmVarDecl - Represents a parameter to a function.
Definition: Decl.h:1513
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:945
Decl * ActOnStartOfFunctionDef(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParamLists, SkipBodyInfo *SkipBody=nullptr)
Definition: SemaDecl.cpp:11823
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:324
void setUninstantiatedDefaultArg(Expr *arg)
Definition: Decl.cpp:2526
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:795
void setKind(tok::TokenKind K)
Definition: Token.h:91
PtrTy get() const
Definition: Ownership.h:162
bool isNot(T Kind) const
Definition: FormatToken.h:313
RAII class used to indicate that we are performing provisional semantic analysis to determine the val...
Definition: Sema.h:7466
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:39
bool hasUnparsedDefaultArg() const
hasUnparsedDefaultArg - Determines whether this parameter has a default argument that has not yet bee...
Definition: Decl.h:1624
SourceLocation ConsumeAnyToken(bool ConsumeCodeCompletionTok=false)
ConsumeAnyToken - Dispatch to the right Consume* method based on the current token type...
Definition: Parser.h:344
Decl * ActOnFinishFunctionBody(Decl *Decl, Stmt *Body)
Definition: SemaDecl.cpp:12191
void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, bool IncludeCXX11Attributes=true)
ProcessDeclAttributeList - Apply all the decl attributes in the specified attribute list to the speci...
DiagnosticsEngine & getDiagnostics() const
Definition: Sema.h:1197
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:1817
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:703
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:129
void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc)
bool isInvalid() const
Definition: Ownership.h:158
bool isDependentContext() const
Determines whether this context is dependent on a template parameter.
Definition: DeclBase.cpp:1026
bool isFriendSpecified() const
Definition: DeclSpec.h:697
bool isUsable() const
Definition: Ownership.h:159
The result type of a method or function.
const LangOptions & getLangOpts() const
Definition: Parser.h:271
This is a scope that corresponds to the parameters within a function prototype for a function declara...
Definition: Scope.h:86
void CheckForFunctionRedefinition(FunctionDecl *FD, const FunctionDecl *EffectiveDefinition=nullptr, SkipBodyInfo *SkipBody=nullptr)
Definition: SemaDecl.cpp:11895
Decl * ActOnSkippedFunctionBody(Decl *Decl)
Definition: SemaDecl.cpp:12183
void ActOnStartCXXInClassMemberInitializer()
Enter a new C++ default initializer scope.
Stop skipping at semicolon.
Definition: Parser.h:925
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:144
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:220
Encodes a location in the source.
void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record)
FunctionDefinitionKind getFunctionDefinitionKind() const
Definition: DeclSpec.h:2427
bool is(tok::TokenKind Kind) const
Definition: FormatToken.h:297
Represents a static or instance method of a struct/union/class.
Definition: DeclCXX.h:1964
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:2458
bool hasUninstantiatedDefaultArg() const
Definition: Decl.h:1628
Scope * getCurScope() const
Definition: Parser.h:278
void ActOnFinishInlineFunctionDef(FunctionDecl *D)
Definition: SemaDecl.cpp:11835
The scope of a struct/union/class definition.
Definition: Scope.h:64
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:1212
This is a scope that corresponds to the template parameters of a C++ template.
Definition: Scope.h:76
void setWillHaveBody(bool V=true)
Definition: Decl.h:2149
bool isOneOf(tok::TokenKind K1, tok::TokenKind K2) const
Definition: Token.h:97
Expr * getUninstantiatedDefaultArg()
Definition: Decl.cpp:2531
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Definition: Parser.cpp:72
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:58
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:316
void ActOnPureSpecifier(Decl *D, SourceLocation PureSpecLoc)
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:328
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.
NamedDecl - This represents a decl with a name.
Definition: Decl.h:245
No in-class initializer.
Definition: Specifiers.h:227
Declaration of a template function.
Definition: DeclTemplate.h:967
bool IsInsideALocalClassWithinATemplateFunction()
void startToken()
Reset all flags to cleared.
Definition: Token.h:169
AttributeList - Represents a syntactic attribute.
Definition: AttributeList.h:95
Stop skipping at specified token, but don&#39;t skip the token itself.
Definition: Parser.h:927
NamedDecl * ActOnFriendFunctionDecl(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParams)
unsigned ActOnReenterTemplateScope(Scope *S, Decl *Template)
SourceLocation getEndLoc() const
Definition: Token.h:151