clang  3.7.0
Parse/Parser.cpp
Go to the documentation of this file.
1 //===--- Parser.cpp - C Language Family Parser ----------------------------===//
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 the Parser interfaces.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/Parse/Parser.h"
15 #include "RAIIObjectsForParser.h"
16 #include "clang/AST/ASTConsumer.h"
17 #include "clang/AST/ASTContext.h"
18 #include "clang/AST/DeclTemplate.h"
20 #include "clang/Sema/DeclSpec.h"
22 #include "clang/Sema/Scope.h"
23 #include "llvm/Support/raw_ostream.h"
24 using namespace clang;
25 
26 
27 namespace {
28 /// \brief A comment handler that passes comments found by the preprocessor
29 /// to the parser action.
30 class ActionCommentHandler : public CommentHandler {
31  Sema &S;
32 
33 public:
34  explicit ActionCommentHandler(Sema &S) : S(S) { }
35 
36  bool HandleComment(Preprocessor &PP, SourceRange Comment) override {
37  S.ActOnComment(Comment);
38  return false;
39  }
40 };
41 
42 /// \brief RAIIObject to destroy the contents of a SmallVector of
43 /// TemplateIdAnnotation pointers and clear the vector.
44 class DestroyTemplateIdAnnotationsRAIIObj {
46 
47 public:
48  DestroyTemplateIdAnnotationsRAIIObj(
50  : Container(Container) {}
51 
52  ~DestroyTemplateIdAnnotationsRAIIObj() {
54  Container.begin(),
55  E = Container.end();
56  I != E; ++I)
57  (*I)->Destroy();
58  Container.clear();
59  }
60 };
61 } // end anonymous namespace
62 
63 IdentifierInfo *Parser::getSEHExceptKeyword() {
64  // __except is accepted as a (contextual) keyword
65  if (!Ident__except && (getLangOpts().MicrosoftExt || getLangOpts().Borland))
66  Ident__except = PP.getIdentifierInfo("__except");
67 
68  return Ident__except;
69 }
70 
71 Parser::Parser(Preprocessor &pp, Sema &actions, bool skipFunctionBodies)
72  : PP(pp), Actions(actions), Diags(PP.getDiagnostics()),
73  GreaterThanIsOperator(true), ColonIsSacred(false),
74  InMessageExpression(false), TemplateParameterDepth(0),
75  ParsingInObjCContainer(false) {
76  SkipFunctionBodies = pp.isCodeCompletionEnabled() || skipFunctionBodies;
77  Tok.startToken();
78  Tok.setKind(tok::eof);
79  Actions.CurScope = nullptr;
80  NumCachedScopes = 0;
81  ParenCount = BracketCount = BraceCount = 0;
82  CurParsedObjCImpl = nullptr;
83 
84  // Add #pragma handlers. These are removed and destroyed in the
85  // destructor.
86  initializePragmaHandlers();
87 
88  CommentSemaHandler.reset(new ActionCommentHandler(actions));
89  PP.addCommentHandler(CommentSemaHandler.get());
90 
91  PP.setCodeCompletionHandler(*this);
92 }
93 
95  return Diags.Report(Loc, DiagID);
96 }
97 
98 DiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) {
99  return Diag(Tok.getLocation(), DiagID);
100 }
101 
102 /// \brief Emits a diagnostic suggesting parentheses surrounding a
103 /// given range.
104 ///
105 /// \param Loc The location where we'll emit the diagnostic.
106 /// \param DK The kind of diagnostic to emit.
107 /// \param ParenRange Source range enclosing code that should be parenthesized.
108 void Parser::SuggestParentheses(SourceLocation Loc, unsigned DK,
109  SourceRange ParenRange) {
110  SourceLocation EndLoc = PP.getLocForEndOfToken(ParenRange.getEnd());
111  if (!ParenRange.getEnd().isFileID() || EndLoc.isInvalid()) {
112  // We can't display the parentheses, so just dig the
113  // warning/error and return.
114  Diag(Loc, DK);
115  return;
116  }
117 
118  Diag(Loc, DK)
119  << FixItHint::CreateInsertion(ParenRange.getBegin(), "(")
120  << FixItHint::CreateInsertion(EndLoc, ")");
121 }
122 
123 static bool IsCommonTypo(tok::TokenKind ExpectedTok, const Token &Tok) {
124  switch (ExpectedTok) {
125  case tok::semi:
126  return Tok.is(tok::colon) || Tok.is(tok::comma); // : or , for ;
127  default: return false;
128  }
129 }
130 
131 bool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID,
132  StringRef Msg) {
133  if (Tok.is(ExpectedTok) || Tok.is(tok::code_completion)) {
134  ConsumeAnyToken();
135  return false;
136  }
137 
138  // Detect common single-character typos and resume.
139  if (IsCommonTypo(ExpectedTok, Tok)) {
140  SourceLocation Loc = Tok.getLocation();
141  {
142  DiagnosticBuilder DB = Diag(Loc, DiagID);
144  SourceRange(Loc), tok::getPunctuatorSpelling(ExpectedTok));
145  if (DiagID == diag::err_expected)
146  DB << ExpectedTok;
147  else if (DiagID == diag::err_expected_after)
148  DB << Msg << ExpectedTok;
149  else
150  DB << Msg;
151  }
152 
153  // Pretend there wasn't a problem.
154  ConsumeAnyToken();
155  return false;
156  }
157 
158  SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation);
159  const char *Spelling = nullptr;
160  if (EndLoc.isValid())
161  Spelling = tok::getPunctuatorSpelling(ExpectedTok);
162 
163  DiagnosticBuilder DB =
164  Spelling
165  ? Diag(EndLoc, DiagID) << FixItHint::CreateInsertion(EndLoc, Spelling)
166  : Diag(Tok, DiagID);
167  if (DiagID == diag::err_expected)
168  DB << ExpectedTok;
169  else if (DiagID == diag::err_expected_after)
170  DB << Msg << ExpectedTok;
171  else
172  DB << Msg;
173 
174  return true;
175 }
176 
177 bool Parser::ExpectAndConsumeSemi(unsigned DiagID) {
178  if (TryConsumeToken(tok::semi))
179  return false;
180 
181  if (Tok.is(tok::code_completion)) {
182  handleUnexpectedCodeCompletionToken();
183  return false;
184  }
185 
186  if ((Tok.is(tok::r_paren) || Tok.is(tok::r_square)) &&
187  NextToken().is(tok::semi)) {
188  Diag(Tok, diag::err_extraneous_token_before_semi)
189  << PP.getSpelling(Tok)
191  ConsumeAnyToken(); // The ')' or ']'.
192  ConsumeToken(); // The ';'.
193  return false;
194  }
195 
196  return ExpectAndConsume(tok::semi, DiagID);
197 }
198 
199 void Parser::ConsumeExtraSemi(ExtraSemiKind Kind, unsigned TST) {
200  if (!Tok.is(tok::semi)) return;
201 
202  bool HadMultipleSemis = false;
203  SourceLocation StartLoc = Tok.getLocation();
204  SourceLocation EndLoc = Tok.getLocation();
205  ConsumeToken();
206 
207  while ((Tok.is(tok::semi) && !Tok.isAtStartOfLine())) {
208  HadMultipleSemis = true;
209  EndLoc = Tok.getLocation();
210  ConsumeToken();
211  }
212 
213  // C++11 allows extra semicolons at namespace scope, but not in any of the
214  // other contexts.
215  if (Kind == OutsideFunction && getLangOpts().CPlusPlus) {
216  if (getLangOpts().CPlusPlus11)
217  Diag(StartLoc, diag::warn_cxx98_compat_top_level_semi)
218  << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
219  else
220  Diag(StartLoc, diag::ext_extra_semi_cxx11)
221  << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
222  return;
223  }
224 
225  if (Kind != AfterMemberFunctionDefinition || HadMultipleSemis)
226  Diag(StartLoc, diag::ext_extra_semi)
228  Actions.getASTContext().getPrintingPolicy())
229  << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
230  else
231  // A single semicolon is valid after a member function definition.
232  Diag(StartLoc, diag::warn_extra_semi_after_mem_fn_def)
233  << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
234 }
235 
236 //===----------------------------------------------------------------------===//
237 // Error recovery.
238 //===----------------------------------------------------------------------===//
239 
241  return (static_cast<unsigned>(L) & static_cast<unsigned>(R)) != 0;
242 }
243 
244 /// SkipUntil - Read tokens until we get to the specified token, then consume
245 /// it (unless no flag StopBeforeMatch). Because we cannot guarantee that the
246 /// token will ever occur, this skips to the next token, or to some likely
247 /// good stopping point. If StopAtSemi is true, skipping will stop at a ';'
248 /// character.
249 ///
250 /// If SkipUntil finds the specified token, it returns true, otherwise it
251 /// returns false.
253  // We always want this function to skip at least one token if the first token
254  // isn't T and if not at EOF.
255  bool isFirstTokenSkipped = true;
256  while (1) {
257  // If we found one of the tokens, stop and return true.
258  for (unsigned i = 0, NumToks = Toks.size(); i != NumToks; ++i) {
259  if (Tok.is(Toks[i])) {
260  if (HasFlagsSet(Flags, StopBeforeMatch)) {
261  // Noop, don't consume the token.
262  } else {
263  ConsumeAnyToken();
264  }
265  return true;
266  }
267  }
268 
269  // Important special case: The caller has given up and just wants us to
270  // skip the rest of the file. Do this without recursing, since we can
271  // get here precisely because the caller detected too much recursion.
272  if (Toks.size() == 1 && Toks[0] == tok::eof &&
273  !HasFlagsSet(Flags, StopAtSemi) &&
275  while (Tok.isNot(tok::eof))
276  ConsumeAnyToken();
277  return true;
278  }
279 
280  switch (Tok.getKind()) {
281  case tok::eof:
282  // Ran out of tokens.
283  return false;
284 
285  case tok::annot_pragma_openmp_end:
286  // Stop before an OpenMP pragma boundary.
287  case tok::annot_module_begin:
288  case tok::annot_module_end:
289  case tok::annot_module_include:
290  // Stop before we change submodules. They generally indicate a "good"
291  // place to pick up parsing again (except in the special case where
292  // we're trying to skip to EOF).
293  return false;
294 
295  case tok::code_completion:
296  if (!HasFlagsSet(Flags, StopAtCodeCompletion))
297  handleUnexpectedCodeCompletionToken();
298  return false;
299 
300  case tok::l_paren:
301  // Recursively skip properly-nested parens.
302  ConsumeParen();
303  if (HasFlagsSet(Flags, StopAtCodeCompletion))
304  SkipUntil(tok::r_paren, StopAtCodeCompletion);
305  else
306  SkipUntil(tok::r_paren);
307  break;
308  case tok::l_square:
309  // Recursively skip properly-nested square brackets.
310  ConsumeBracket();
311  if (HasFlagsSet(Flags, StopAtCodeCompletion))
312  SkipUntil(tok::r_square, StopAtCodeCompletion);
313  else
314  SkipUntil(tok::r_square);
315  break;
316  case tok::l_brace:
317  // Recursively skip properly-nested braces.
318  ConsumeBrace();
319  if (HasFlagsSet(Flags, StopAtCodeCompletion))
320  SkipUntil(tok::r_brace, StopAtCodeCompletion);
321  else
322  SkipUntil(tok::r_brace);
323  break;
324 
325  // Okay, we found a ']' or '}' or ')', which we think should be balanced.
326  // Since the user wasn't looking for this token (if they were, it would
327  // already be handled), this isn't balanced. If there is a LHS token at a
328  // higher level, we will assume that this matches the unbalanced token
329  // and return it. Otherwise, this is a spurious RHS token, which we skip.
330  case tok::r_paren:
331  if (ParenCount && !isFirstTokenSkipped)
332  return false; // Matches something.
333  ConsumeParen();
334  break;
335  case tok::r_square:
336  if (BracketCount && !isFirstTokenSkipped)
337  return false; // Matches something.
338  ConsumeBracket();
339  break;
340  case tok::r_brace:
341  if (BraceCount && !isFirstTokenSkipped)
342  return false; // Matches something.
343  ConsumeBrace();
344  break;
345 
346  case tok::string_literal:
347  case tok::wide_string_literal:
348  case tok::utf8_string_literal:
349  case tok::utf16_string_literal:
350  case tok::utf32_string_literal:
351  ConsumeStringToken();
352  break;
353 
354  case tok::semi:
355  if (HasFlagsSet(Flags, StopAtSemi))
356  return false;
357  // FALL THROUGH.
358  default:
359  // Skip this token.
360  ConsumeToken();
361  break;
362  }
363  isFirstTokenSkipped = false;
364  }
365 }
366 
367 //===----------------------------------------------------------------------===//
368 // Scope manipulation
369 //===----------------------------------------------------------------------===//
370 
371 /// EnterScope - Start a new scope.
372 void Parser::EnterScope(unsigned ScopeFlags) {
373  if (NumCachedScopes) {
374  Scope *N = ScopeCache[--NumCachedScopes];
375  N->Init(getCurScope(), ScopeFlags);
376  Actions.CurScope = N;
377  } else {
378  Actions.CurScope = new Scope(getCurScope(), ScopeFlags, Diags);
379  }
380 }
381 
382 /// ExitScope - Pop a scope off the scope stack.
384  assert(getCurScope() && "Scope imbalance!");
385 
386  // Inform the actions module that this scope is going away if there are any
387  // decls in it.
388  Actions.ActOnPopScope(Tok.getLocation(), getCurScope());
389 
390  Scope *OldScope = getCurScope();
391  Actions.CurScope = OldScope->getParent();
392 
393  if (NumCachedScopes == ScopeCacheSize)
394  delete OldScope;
395  else
396  ScopeCache[NumCachedScopes++] = OldScope;
397 }
398 
399 /// Set the flags for the current scope to ScopeFlags. If ManageFlags is false,
400 /// this object does nothing.
401 Parser::ParseScopeFlags::ParseScopeFlags(Parser *Self, unsigned ScopeFlags,
402  bool ManageFlags)
403  : CurScope(ManageFlags ? Self->getCurScope() : nullptr) {
404  if (CurScope) {
405  OldFlags = CurScope->getFlags();
406  CurScope->setFlags(ScopeFlags);
407  }
408 }
409 
410 /// Restore the flags for the current scope to what they were before this
411 /// object overrode them.
412 Parser::ParseScopeFlags::~ParseScopeFlags() {
413  if (CurScope)
414  CurScope->setFlags(OldFlags);
415 }
416 
417 
418 //===----------------------------------------------------------------------===//
419 // C99 6.9: External Definitions.
420 //===----------------------------------------------------------------------===//
421 
423  // If we still have scopes active, delete the scope tree.
424  delete getCurScope();
425  Actions.CurScope = nullptr;
426 
427  // Free the scope cache.
428  for (unsigned i = 0, e = NumCachedScopes; i != e; ++i)
429  delete ScopeCache[i];
430 
431  resetPragmaHandlers();
432 
433  PP.removeCommentHandler(CommentSemaHandler.get());
434 
436 
437  if (getLangOpts().DelayedTemplateParsing &&
438  !PP.isIncrementalProcessingEnabled() && !TemplateIds.empty()) {
439  // If an ASTConsumer parsed delay-parsed templates in their
440  // HandleTranslationUnit() method, TemplateIds created there were not
441  // guarded by a DestroyTemplateIdAnnotationsRAIIObj object in
442  // ParseTopLevelDecl(). Destroy them here.
443  DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
444  }
445 
446  assert(TemplateIds.empty() && "Still alive TemplateIdAnnotations around?");
447 }
448 
449 /// Initialize - Warm up the parser.
450 ///
452  // Create the translation unit scope. Install it as the current scope.
453  assert(getCurScope() == nullptr && "A scope is already active?");
456 
457  // Initialization for Objective-C context sensitive keywords recognition.
458  // Referenced in Parser::ParseObjCTypeQualifierList.
459  if (getLangOpts().ObjC1) {
460  ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in");
461  ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out");
462  ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout");
463  ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway");
464  ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy");
465  ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref");
466  ObjCTypeQuals[objc_nonnull] = &PP.getIdentifierTable().get("nonnull");
467  ObjCTypeQuals[objc_nullable] = &PP.getIdentifierTable().get("nullable");
468  ObjCTypeQuals[objc_null_unspecified]
469  = &PP.getIdentifierTable().get("null_unspecified");
470  }
471 
472  Ident_instancetype = nullptr;
473  Ident_final = nullptr;
474  Ident_sealed = nullptr;
475  Ident_override = nullptr;
476 
477  Ident_super = &PP.getIdentifierTable().get("super");
478 
479  Ident_vector = nullptr;
480  Ident_bool = nullptr;
481  Ident_pixel = nullptr;
482  if (getLangOpts().AltiVec || getLangOpts().ZVector) {
483  Ident_vector = &PP.getIdentifierTable().get("vector");
484  Ident_bool = &PP.getIdentifierTable().get("bool");
485  }
486  if (getLangOpts().AltiVec)
487  Ident_pixel = &PP.getIdentifierTable().get("pixel");
488 
489  Ident_introduced = nullptr;
490  Ident_deprecated = nullptr;
491  Ident_obsoleted = nullptr;
492  Ident_unavailable = nullptr;
493 
494  Ident__except = nullptr;
495 
496  Ident__exception_code = Ident__exception_info = nullptr;
497  Ident__abnormal_termination = Ident___exception_code = nullptr;
498  Ident___exception_info = Ident___abnormal_termination = nullptr;
499  Ident_GetExceptionCode = Ident_GetExceptionInfo = nullptr;
500  Ident_AbnormalTermination = nullptr;
501 
502  if(getLangOpts().Borland) {
503  Ident__exception_info = PP.getIdentifierInfo("_exception_info");
504  Ident___exception_info = PP.getIdentifierInfo("__exception_info");
505  Ident_GetExceptionInfo = PP.getIdentifierInfo("GetExceptionInformation");
506  Ident__exception_code = PP.getIdentifierInfo("_exception_code");
507  Ident___exception_code = PP.getIdentifierInfo("__exception_code");
508  Ident_GetExceptionCode = PP.getIdentifierInfo("GetExceptionCode");
509  Ident__abnormal_termination = PP.getIdentifierInfo("_abnormal_termination");
510  Ident___abnormal_termination = PP.getIdentifierInfo("__abnormal_termination");
511  Ident_AbnormalTermination = PP.getIdentifierInfo("AbnormalTermination");
512 
513  PP.SetPoisonReason(Ident__exception_code,diag::err_seh___except_block);
514  PP.SetPoisonReason(Ident___exception_code,diag::err_seh___except_block);
515  PP.SetPoisonReason(Ident_GetExceptionCode,diag::err_seh___except_block);
516  PP.SetPoisonReason(Ident__exception_info,diag::err_seh___except_filter);
517  PP.SetPoisonReason(Ident___exception_info,diag::err_seh___except_filter);
518  PP.SetPoisonReason(Ident_GetExceptionInfo,diag::err_seh___except_filter);
519  PP.SetPoisonReason(Ident__abnormal_termination,diag::err_seh___finally_block);
520  PP.SetPoisonReason(Ident___abnormal_termination,diag::err_seh___finally_block);
521  PP.SetPoisonReason(Ident_AbnormalTermination,diag::err_seh___finally_block);
522  }
523 
524  Actions.Initialize();
525 
526  // Prime the lexer look-ahead.
527  ConsumeToken();
528 }
529 
530 void Parser::LateTemplateParserCleanupCallback(void *P) {
531  // While this RAII helper doesn't bracket any actual work, the destructor will
532  // clean up annotations that were created during ActOnEndOfTranslationUnit
533  // when incremental processing is enabled.
534  DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(((Parser *)P)->TemplateIds);
535 }
536 
537 /// ParseTopLevelDecl - Parse one top-level declaration, return whatever the
538 /// action tells us to. This returns true if the EOF was encountered.
540  DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
541 
542  // Skip over the EOF token, flagging end of previous input for incremental
543  // processing
544  if (PP.isIncrementalProcessingEnabled() && Tok.is(tok::eof))
545  ConsumeToken();
546 
547  Result = DeclGroupPtrTy();
548  switch (Tok.getKind()) {
549  case tok::annot_pragma_unused:
550  HandlePragmaUnused();
551  return false;
552 
553  case tok::annot_module_include:
554  Actions.ActOnModuleInclude(Tok.getLocation(),
555  reinterpret_cast<Module *>(
556  Tok.getAnnotationValue()));
557  ConsumeToken();
558  return false;
559 
560  case tok::annot_module_begin:
561  Actions.ActOnModuleBegin(Tok.getLocation(), reinterpret_cast<Module *>(
562  Tok.getAnnotationValue()));
563  ConsumeToken();
564  return false;
565 
566  case tok::annot_module_end:
567  Actions.ActOnModuleEnd(Tok.getLocation(), reinterpret_cast<Module *>(
568  Tok.getAnnotationValue()));
569  ConsumeToken();
570  return false;
571 
572  case tok::eof:
573  // Late template parsing can begin.
574  if (getLangOpts().DelayedTemplateParsing)
575  Actions.SetLateTemplateParser(LateTemplateParserCallback,
577  LateTemplateParserCleanupCallback : nullptr,
578  this);
580  Actions.ActOnEndOfTranslationUnit();
581  //else don't tell Sema that we ended parsing: more input might come.
582  return true;
583 
584  default:
585  break;
586  }
587 
588  ParsedAttributesWithRange attrs(AttrFactory);
589  MaybeParseCXX11Attributes(attrs);
590  MaybeParseMicrosoftAttributes(attrs);
591 
592  Result = ParseExternalDeclaration(attrs);
593  return false;
594 }
595 
596 /// ParseExternalDeclaration:
597 ///
598 /// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl]
599 /// function-definition
600 /// declaration
601 /// [GNU] asm-definition
602 /// [GNU] __extension__ external-declaration
603 /// [OBJC] objc-class-definition
604 /// [OBJC] objc-class-declaration
605 /// [OBJC] objc-alias-declaration
606 /// [OBJC] objc-protocol-definition
607 /// [OBJC] objc-method-definition
608 /// [OBJC] @end
609 /// [C++] linkage-specification
610 /// [GNU] asm-definition:
611 /// simple-asm-expr ';'
612 /// [C++11] empty-declaration
613 /// [C++11] attribute-declaration
614 ///
615 /// [C++11] empty-declaration:
616 /// ';'
617 ///
618 /// [C++0x/GNU] 'extern' 'template' declaration
620 Parser::ParseExternalDeclaration(ParsedAttributesWithRange &attrs,
621  ParsingDeclSpec *DS) {
622  DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
623  ParenBraceBracketBalancer BalancerRAIIObj(*this);
624 
625  if (PP.isCodeCompletionReached()) {
626  cutOffParsing();
627  return DeclGroupPtrTy();
628  }
629 
630  Decl *SingleDecl = nullptr;
631  switch (Tok.getKind()) {
632  case tok::annot_pragma_vis:
633  HandlePragmaVisibility();
634  return DeclGroupPtrTy();
635  case tok::annot_pragma_pack:
636  HandlePragmaPack();
637  return DeclGroupPtrTy();
638  case tok::annot_pragma_msstruct:
639  HandlePragmaMSStruct();
640  return DeclGroupPtrTy();
641  case tok::annot_pragma_align:
642  HandlePragmaAlign();
643  return DeclGroupPtrTy();
644  case tok::annot_pragma_weak:
645  HandlePragmaWeak();
646  return DeclGroupPtrTy();
647  case tok::annot_pragma_weakalias:
648  HandlePragmaWeakAlias();
649  return DeclGroupPtrTy();
650  case tok::annot_pragma_redefine_extname:
651  HandlePragmaRedefineExtname();
652  return DeclGroupPtrTy();
653  case tok::annot_pragma_fp_contract:
654  HandlePragmaFPContract();
655  return DeclGroupPtrTy();
656  case tok::annot_pragma_opencl_extension:
657  HandlePragmaOpenCLExtension();
658  return DeclGroupPtrTy();
659  case tok::annot_pragma_openmp:
660  return ParseOpenMPDeclarativeDirective();
661  case tok::annot_pragma_ms_pointers_to_members:
662  HandlePragmaMSPointersToMembers();
663  return DeclGroupPtrTy();
664  case tok::annot_pragma_ms_vtordisp:
665  HandlePragmaMSVtorDisp();
666  return DeclGroupPtrTy();
667  case tok::annot_pragma_ms_pragma:
668  HandlePragmaMSPragma();
669  return DeclGroupPtrTy();
670  case tok::semi:
671  // Either a C++11 empty-declaration or attribute-declaration.
672  SingleDecl = Actions.ActOnEmptyDeclaration(getCurScope(),
673  attrs.getList(),
674  Tok.getLocation());
675  ConsumeExtraSemi(OutsideFunction);
676  break;
677  case tok::r_brace:
678  Diag(Tok, diag::err_extraneous_closing_brace);
679  ConsumeBrace();
680  return DeclGroupPtrTy();
681  case tok::eof:
682  Diag(Tok, diag::err_expected_external_declaration);
683  return DeclGroupPtrTy();
684  case tok::kw___extension__: {
685  // __extension__ silences extension warnings in the subexpression.
686  ExtensionRAIIObject O(Diags); // Use RAII to do this.
687  ConsumeToken();
688  return ParseExternalDeclaration(attrs);
689  }
690  case tok::kw_asm: {
691  ProhibitAttributes(attrs);
692 
693  SourceLocation StartLoc = Tok.getLocation();
694  SourceLocation EndLoc;
695 
696  ExprResult Result(ParseSimpleAsm(&EndLoc));
697 
698  // Check if GNU-style InlineAsm is disabled.
699  // Empty asm string is allowed because it will not introduce
700  // any assembly code.
701  if (!(getLangOpts().GNUAsm || Result.isInvalid())) {
702  const auto *SL = cast<StringLiteral>(Result.get());
703  if (!SL->getString().trim().empty())
704  Diag(StartLoc, diag::err_gnu_inline_asm_disabled);
705  }
706 
707  ExpectAndConsume(tok::semi, diag::err_expected_after,
708  "top-level asm block");
709 
710  if (Result.isInvalid())
711  return DeclGroupPtrTy();
712  SingleDecl = Actions.ActOnFileScopeAsmDecl(Result.get(), StartLoc, EndLoc);
713  break;
714  }
715  case tok::at:
716  return ParseObjCAtDirectives();
717  case tok::minus:
718  case tok::plus:
719  if (!getLangOpts().ObjC1) {
720  Diag(Tok, diag::err_expected_external_declaration);
721  ConsumeToken();
722  return DeclGroupPtrTy();
723  }
724  SingleDecl = ParseObjCMethodDefinition();
725  break;
726  case tok::code_completion:
728  CurParsedObjCImpl? Sema::PCC_ObjCImplementation
730  cutOffParsing();
731  return DeclGroupPtrTy();
732  case tok::kw_using:
733  case tok::kw_namespace:
734  case tok::kw_typedef:
735  case tok::kw_template:
736  case tok::kw_export: // As in 'export template'
737  case tok::kw_static_assert:
738  case tok::kw__Static_assert:
739  // A function definition cannot start with any of these keywords.
740  {
741  SourceLocation DeclEnd;
742  return ParseDeclaration(Declarator::FileContext, DeclEnd, attrs);
743  }
744 
745  case tok::kw_static:
746  // Parse (then ignore) 'static' prior to a template instantiation. This is
747  // a GCC extension that we intentionally do not support.
748  if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
749  Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
750  << 0;
751  SourceLocation DeclEnd;
752  return ParseDeclaration(Declarator::FileContext, DeclEnd, attrs);
753  }
754  goto dont_know;
755 
756  case tok::kw_inline:
757  if (getLangOpts().CPlusPlus) {
758  tok::TokenKind NextKind = NextToken().getKind();
759 
760  // Inline namespaces. Allowed as an extension even in C++03.
761  if (NextKind == tok::kw_namespace) {
762  SourceLocation DeclEnd;
763  return ParseDeclaration(Declarator::FileContext, DeclEnd, attrs);
764  }
765 
766  // Parse (then ignore) 'inline' prior to a template instantiation. This is
767  // a GCC extension that we intentionally do not support.
768  if (NextKind == tok::kw_template) {
769  Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
770  << 1;
771  SourceLocation DeclEnd;
772  return ParseDeclaration(Declarator::FileContext, DeclEnd, attrs);
773  }
774  }
775  goto dont_know;
776 
777  case tok::kw_extern:
778  if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
779  // Extern templates
780  SourceLocation ExternLoc = ConsumeToken();
781  SourceLocation TemplateLoc = ConsumeToken();
782  Diag(ExternLoc, getLangOpts().CPlusPlus11 ?
783  diag::warn_cxx98_compat_extern_template :
784  diag::ext_extern_template) << SourceRange(ExternLoc, TemplateLoc);
785  SourceLocation DeclEnd;
786  return Actions.ConvertDeclToDeclGroup(
787  ParseExplicitInstantiation(Declarator::FileContext,
788  ExternLoc, TemplateLoc, DeclEnd));
789  }
790  goto dont_know;
791 
792  case tok::kw___if_exists:
793  case tok::kw___if_not_exists:
794  ParseMicrosoftIfExistsExternalDeclaration();
795  return DeclGroupPtrTy();
796 
797  default:
798  dont_know:
799  // We can't tell whether this is a function-definition or declaration yet.
800  return ParseDeclarationOrFunctionDefinition(attrs, DS);
801  }
802 
803  // This routine returns a DeclGroup, if the thing we parsed only contains a
804  // single decl, convert it now.
805  return Actions.ConvertDeclToDeclGroup(SingleDecl);
806 }
807 
808 /// \brief Determine whether the current token, if it occurs after a
809 /// declarator, continues a declaration or declaration list.
810 bool Parser::isDeclarationAfterDeclarator() {
811  // Check for '= delete' or '= default'
812  if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
813  const Token &KW = NextToken();
814  if (KW.is(tok::kw_default) || KW.is(tok::kw_delete))
815  return false;
816  }
817 
818  return Tok.is(tok::equal) || // int X()= -> not a function def
819  Tok.is(tok::comma) || // int X(), -> not a function def
820  Tok.is(tok::semi) || // int X(); -> not a function def
821  Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def
822  Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def
823  (getLangOpts().CPlusPlus &&
824  Tok.is(tok::l_paren)); // int X(0) -> not a function def [C++]
825 }
826 
827 /// \brief Determine whether the current token, if it occurs after a
828 /// declarator, indicates the start of a function definition.
829 bool Parser::isStartOfFunctionDefinition(const ParsingDeclarator &Declarator) {
830  assert(Declarator.isFunctionDeclarator() && "Isn't a function declarator");
831  if (Tok.is(tok::l_brace)) // int X() {}
832  return true;
833 
834  // Handle K&R C argument lists: int X(f) int f; {}
835  if (!getLangOpts().CPlusPlus &&
836  Declarator.getFunctionTypeInfo().isKNRPrototype())
837  return isDeclarationSpecifier();
838 
839  if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
840  const Token &KW = NextToken();
841  return KW.is(tok::kw_default) || KW.is(tok::kw_delete);
842  }
843 
844  return Tok.is(tok::colon) || // X() : Base() {} (used for ctors)
845  Tok.is(tok::kw_try); // X() try { ... }
846 }
847 
848 /// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or
849 /// a declaration. We can't tell which we have until we read up to the
850 /// compound-statement in function-definition. TemplateParams, if
851 /// non-NULL, provides the template parameters when we're parsing a
852 /// C++ template-declaration.
853 ///
854 /// function-definition: [C99 6.9.1]
855 /// decl-specs declarator declaration-list[opt] compound-statement
856 /// [C90] function-definition: [C99 6.7.1] - implicit int result
857 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
858 ///
859 /// declaration: [C99 6.7]
860 /// declaration-specifiers init-declarator-list[opt] ';'
861 /// [!C99] init-declarator-list ';' [TODO: warn in c99 mode]
862 /// [OMP] threadprivate-directive [TODO]
863 ///
865 Parser::ParseDeclOrFunctionDefInternal(ParsedAttributesWithRange &attrs,
866  ParsingDeclSpec &DS,
867  AccessSpecifier AS) {
868  // Parse the common declaration-specifiers piece.
869  ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS, DSC_top_level);
870 
871  // If we had a free-standing type definition with a missing semicolon, we
872  // may get this far before the problem becomes obvious.
873  if (DS.hasTagDefinition() &&
874  DiagnoseMissingSemiAfterTagDefinition(DS, AS, DSC_top_level))
875  return DeclGroupPtrTy();
876 
877  // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
878  // declaration-specifiers init-declarator-list[opt] ';'
879  if (Tok.is(tok::semi)) {
880  ProhibitAttributes(attrs);
881  ConsumeToken();
882  Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS);
883  DS.complete(TheDecl);
884  return Actions.ConvertDeclToDeclGroup(TheDecl);
885  }
886 
887  DS.takeAttributesFrom(attrs);
888 
889  // ObjC2 allows prefix attributes on class interfaces and protocols.
890  // FIXME: This still needs better diagnostics. We should only accept
891  // attributes here, no types, etc.
892  if (getLangOpts().ObjC2 && Tok.is(tok::at)) {
893  SourceLocation AtLoc = ConsumeToken(); // the "@"
894  if (!Tok.isObjCAtKeyword(tok::objc_interface) &&
895  !Tok.isObjCAtKeyword(tok::objc_protocol)) {
896  Diag(Tok, diag::err_objc_unexpected_attr);
897  SkipUntil(tok::semi); // FIXME: better skip?
898  return DeclGroupPtrTy();
899  }
900 
901  DS.abort();
902 
903  const char *PrevSpec = nullptr;
904  unsigned DiagID;
905  if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec, DiagID,
906  Actions.getASTContext().getPrintingPolicy()))
907  Diag(AtLoc, DiagID) << PrevSpec;
908 
909  if (Tok.isObjCAtKeyword(tok::objc_protocol))
910  return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes());
911 
912  return Actions.ConvertDeclToDeclGroup(
913  ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()));
914  }
915 
916  // If the declspec consisted only of 'extern' and we have a string
917  // literal following it, this must be a C++ linkage specifier like
918  // 'extern "C"'.
919  if (getLangOpts().CPlusPlus && isTokenStringLiteral() &&
922  Decl *TheDecl = ParseLinkage(DS, Declarator::FileContext);
923  return Actions.ConvertDeclToDeclGroup(TheDecl);
924  }
925 
926  return ParseDeclGroup(DS, Declarator::FileContext);
927 }
928 
930 Parser::ParseDeclarationOrFunctionDefinition(ParsedAttributesWithRange &attrs,
931  ParsingDeclSpec *DS,
932  AccessSpecifier AS) {
933  if (DS) {
934  return ParseDeclOrFunctionDefInternal(attrs, *DS, AS);
935  } else {
936  ParsingDeclSpec PDS(*this);
937  // Must temporarily exit the objective-c container scope for
938  // parsing c constructs and re-enter objc container scope
939  // afterwards.
940  ObjCDeclContextSwitch ObjCDC(*this);
941 
942  return ParseDeclOrFunctionDefInternal(attrs, PDS, AS);
943  }
944 }
945 
946 /// ParseFunctionDefinition - We parsed and verified that the specified
947 /// Declarator is well formed. If this is a K&R-style function, read the
948 /// parameters declaration-list, then start the compound-statement.
949 ///
950 /// function-definition: [C99 6.9.1]
951 /// decl-specs declarator declaration-list[opt] compound-statement
952 /// [C90] function-definition: [C99 6.7.1] - implicit int result
953 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
954 /// [C++] function-definition: [C++ 8.4]
955 /// decl-specifier-seq[opt] declarator ctor-initializer[opt]
956 /// function-body
957 /// [C++] function-definition: [C++ 8.4]
958 /// decl-specifier-seq[opt] declarator function-try-block
959 ///
960 Decl *Parser::ParseFunctionDefinition(ParsingDeclarator &D,
961  const ParsedTemplateInfo &TemplateInfo,
962  LateParsedAttrList *LateParsedAttrs) {
963  // Poison SEH identifiers so they are flagged as illegal in function bodies.
964  PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true);
966 
967  // If this is C90 and the declspecs were completely missing, fudge in an
968  // implicit int. We do this here because this is the only place where
969  // declaration-specifiers are completely optional in the grammar.
970  if (getLangOpts().ImplicitInt && D.getDeclSpec().isEmpty()) {
971  const char *PrevSpec;
972  unsigned DiagID;
973  const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
975  D.getIdentifierLoc(),
976  PrevSpec, DiagID,
977  Policy);
979  }
980 
981  // If this declaration was formed with a K&R-style identifier list for the
982  // arguments, parse declarations for all of the args next.
983  // int foo(a,b) int a; float b; {}
984  if (FTI.isKNRPrototype())
985  ParseKNRParamDeclarations(D);
986 
987  // We should have either an opening brace or, in a C++ constructor,
988  // we may have a colon.
989  if (Tok.isNot(tok::l_brace) &&
990  (!getLangOpts().CPlusPlus ||
991  (Tok.isNot(tok::colon) && Tok.isNot(tok::kw_try) &&
992  Tok.isNot(tok::equal)))) {
993  Diag(Tok, diag::err_expected_fn_body);
994 
995  // Skip over garbage, until we get to '{'. Don't eat the '{'.
996  SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
997 
998  // If we didn't find the '{', bail out.
999  if (Tok.isNot(tok::l_brace))
1000  return nullptr;
1001  }
1002 
1003  // Check to make sure that any normal attributes are allowed to be on
1004  // a definition. Late parsed attributes are checked at the end.
1005  if (Tok.isNot(tok::equal)) {
1006  AttributeList *DtorAttrs = D.getAttributes();
1007  while (DtorAttrs) {
1008  if (DtorAttrs->isKnownToGCC() &&
1009  !DtorAttrs->isCXX11Attribute()) {
1010  Diag(DtorAttrs->getLoc(), diag::warn_attribute_on_function_definition)
1011  << DtorAttrs->getName();
1012  }
1013  DtorAttrs = DtorAttrs->getNext();
1014  }
1015  }
1016 
1017  // In delayed template parsing mode, for function template we consume the
1018  // tokens and store them for late parsing at the end of the translation unit.
1019  if (getLangOpts().DelayedTemplateParsing && Tok.isNot(tok::equal) &&
1020  TemplateInfo.Kind == ParsedTemplateInfo::Template &&
1021  Actions.canDelayFunctionBody(D)) {
1022  MultiTemplateParamsArg TemplateParameterLists(*TemplateInfo.TemplateParams);
1023 
1024  ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
1025  Scope *ParentScope = getCurScope()->getParent();
1026 
1028  Decl *DP = Actions.HandleDeclarator(ParentScope, D,
1030  D.complete(DP);
1031  D.getMutableDeclSpec().abort();
1032 
1033  CachedTokens Toks;
1034  LexTemplateFunctionForLateParsing(Toks);
1035 
1036  if (DP) {
1037  FunctionDecl *FnD = DP->getAsFunction();
1038  Actions.CheckForFunctionRedefinition(FnD);
1039  Actions.MarkAsLateParsedTemplate(FnD, DP, Toks);
1040  }
1041  return DP;
1042  }
1043  else if (CurParsedObjCImpl &&
1044  !TemplateInfo.TemplateParams &&
1045  (Tok.is(tok::l_brace) || Tok.is(tok::kw_try) ||
1046  Tok.is(tok::colon)) &&
1047  Actions.CurContext->isTranslationUnit()) {
1048  ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
1049  Scope *ParentScope = getCurScope()->getParent();
1050 
1052  Decl *FuncDecl = Actions.HandleDeclarator(ParentScope, D,
1054  D.complete(FuncDecl);
1055  D.getMutableDeclSpec().abort();
1056  if (FuncDecl) {
1057  // Consume the tokens and store them for later parsing.
1058  StashAwayMethodOrFunctionBodyTokens(FuncDecl);
1059  CurParsedObjCImpl->HasCFunction = true;
1060  return FuncDecl;
1061  }
1062  // FIXME: Should we really fall through here?
1063  }
1064 
1065  // Enter a scope for the function body.
1066  ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
1067 
1068  // Tell the actions module that we have entered a function definition with the
1069  // specified Declarator for the function.
1070  Decl *Res = TemplateInfo.TemplateParams?
1072  *TemplateInfo.TemplateParams, D)
1073  : Actions.ActOnStartOfFunctionDef(getCurScope(), D);
1074 
1075  // Break out of the ParsingDeclarator context before we parse the body.
1076  D.complete(Res);
1077 
1078  // Break out of the ParsingDeclSpec context, too. This const_cast is
1079  // safe because we're always the sole owner.
1080  D.getMutableDeclSpec().abort();
1081 
1082  if (TryConsumeToken(tok::equal)) {
1083  assert(getLangOpts().CPlusPlus && "Only C++ function definitions have '='");
1084 
1085  bool Delete = false;
1086  SourceLocation KWLoc;
1087  if (TryConsumeToken(tok::kw_delete, KWLoc)) {
1088  Diag(KWLoc, getLangOpts().CPlusPlus11
1089  ? diag::warn_cxx98_compat_deleted_function
1090  : diag::ext_deleted_function);
1091  Actions.SetDeclDeleted(Res, KWLoc);
1092  Delete = true;
1093  } else if (TryConsumeToken(tok::kw_default, KWLoc)) {
1094  Diag(KWLoc, getLangOpts().CPlusPlus11
1095  ? diag::warn_cxx98_compat_defaulted_function
1096  : diag::ext_defaulted_function);
1097  Actions.SetDeclDefaulted(Res, KWLoc);
1098  } else {
1099  llvm_unreachable("function definition after = not 'delete' or 'default'");
1100  }
1101 
1102  if (Tok.is(tok::comma)) {
1103  Diag(KWLoc, diag::err_default_delete_in_multiple_declaration)
1104  << Delete;
1105  SkipUntil(tok::semi);
1106  } else if (ExpectAndConsume(tok::semi, diag::err_expected_after,
1107  Delete ? "delete" : "default")) {
1108  SkipUntil(tok::semi);
1109  }
1110 
1111  Stmt *GeneratedBody = Res ? Res->getBody() : nullptr;
1112  Actions.ActOnFinishFunctionBody(Res, GeneratedBody, false);
1113  return Res;
1114  }
1115 
1116  if (Tok.is(tok::kw_try))
1117  return ParseFunctionTryBlock(Res, BodyScope);
1118 
1119  // If we have a colon, then we're probably parsing a C++
1120  // ctor-initializer.
1121  if (Tok.is(tok::colon)) {
1122  ParseConstructorInitializer(Res);
1123 
1124  // Recover from error.
1125  if (!Tok.is(tok::l_brace)) {
1126  BodyScope.Exit();
1127  Actions.ActOnFinishFunctionBody(Res, nullptr);
1128  return Res;
1129  }
1130  } else
1131  Actions.ActOnDefaultCtorInitializers(Res);
1132 
1133  // Late attributes are parsed in the same scope as the function body.
1134  if (LateParsedAttrs)
1135  ParseLexedAttributeList(*LateParsedAttrs, Res, false, true);
1136 
1137  return ParseFunctionStatementBody(Res, BodyScope);
1138 }
1139 
1140 /// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides
1141 /// types for a function with a K&R-style identifier list for arguments.
1142 void Parser::ParseKNRParamDeclarations(Declarator &D) {
1143  // We know that the top-level of this declarator is a function.
1145 
1146  // Enter function-declaration scope, limiting any declarators to the
1147  // function prototype scope, including parameter declarators.
1148  ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
1150 
1151  // Read all the argument declarations.
1152  while (isDeclarationSpecifier()) {
1153  SourceLocation DSStart = Tok.getLocation();
1154 
1155  // Parse the common declaration-specifiers piece.
1156  DeclSpec DS(AttrFactory);
1157  ParseDeclarationSpecifiers(DS);
1158 
1159  // C99 6.9.1p6: 'each declaration in the declaration list shall have at
1160  // least one declarator'.
1161  // NOTE: GCC just makes this an ext-warn. It's not clear what it does with
1162  // the declarations though. It's trivial to ignore them, really hard to do
1163  // anything else with them.
1164  if (TryConsumeToken(tok::semi)) {
1165  Diag(DSStart, diag::err_declaration_does_not_declare_param);
1166  continue;
1167  }
1168 
1169  // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other
1170  // than register.
1174  diag::err_invalid_storage_class_in_func_decl);
1176  }
1179  diag::err_invalid_storage_class_in_func_decl);
1181  }
1182 
1183  // Parse the first declarator attached to this declspec.
1184  Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext);
1185  ParseDeclarator(ParmDeclarator);
1186 
1187  // Handle the full declarator list.
1188  while (1) {
1189  // If attributes are present, parse them.
1190  MaybeParseGNUAttributes(ParmDeclarator);
1191 
1192  // Ask the actions module to compute the type for this declarator.
1193  Decl *Param =
1194  Actions.ActOnParamDeclarator(getCurScope(), ParmDeclarator);
1195 
1196  if (Param &&
1197  // A missing identifier has already been diagnosed.
1198  ParmDeclarator.getIdentifier()) {
1199 
1200  // Scan the argument list looking for the correct param to apply this
1201  // type.
1202  for (unsigned i = 0; ; ++i) {
1203  // C99 6.9.1p6: those declarators shall declare only identifiers from
1204  // the identifier list.
1205  if (i == FTI.NumParams) {
1206  Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param)
1207  << ParmDeclarator.getIdentifier();
1208  break;
1209  }
1210 
1211  if (FTI.Params[i].Ident == ParmDeclarator.getIdentifier()) {
1212  // Reject redefinitions of parameters.
1213  if (FTI.Params[i].Param) {
1214  Diag(ParmDeclarator.getIdentifierLoc(),
1215  diag::err_param_redefinition)
1216  << ParmDeclarator.getIdentifier();
1217  } else {
1218  FTI.Params[i].Param = Param;
1219  }
1220  break;
1221  }
1222  }
1223  }
1224 
1225  // If we don't have a comma, it is either the end of the list (a ';') or
1226  // an error, bail out.
1227  if (Tok.isNot(tok::comma))
1228  break;
1229 
1230  ParmDeclarator.clear();
1231 
1232  // Consume the comma.
1233  ParmDeclarator.setCommaLoc(ConsumeToken());
1234 
1235  // Parse the next declarator.
1236  ParseDeclarator(ParmDeclarator);
1237  }
1238 
1239  // Consume ';' and continue parsing.
1240  if (!ExpectAndConsumeSemi(diag::err_expected_semi_declaration))
1241  continue;
1242 
1243  // Otherwise recover by skipping to next semi or mandatory function body.
1244  if (SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch))
1245  break;
1246  TryConsumeToken(tok::semi);
1247  }
1248 
1249  // The actions module must verify that all arguments were declared.
1251 }
1252 
1253 
1254 /// ParseAsmStringLiteral - This is just a normal string-literal, but is not
1255 /// allowed to be a wide string, and is not subject to character translation.
1256 ///
1257 /// [GNU] asm-string-literal:
1258 /// string-literal
1259 ///
1260 ExprResult Parser::ParseAsmStringLiteral() {
1261  if (!isTokenStringLiteral()) {
1262  Diag(Tok, diag::err_expected_string_literal)
1263  << /*Source='in...'*/0 << "'asm'";
1264  return ExprError();
1265  }
1266 
1267  ExprResult AsmString(ParseStringLiteralExpression());
1268  if (!AsmString.isInvalid()) {
1269  const auto *SL = cast<StringLiteral>(AsmString.get());
1270  if (!SL->isAscii()) {
1271  Diag(Tok, diag::err_asm_operand_wide_string_literal)
1272  << SL->isWide()
1273  << SL->getSourceRange();
1274  return ExprError();
1275  }
1276  }
1277  return AsmString;
1278 }
1279 
1280 /// ParseSimpleAsm
1281 ///
1282 /// [GNU] simple-asm-expr:
1283 /// 'asm' '(' asm-string-literal ')'
1284 ///
1285 ExprResult Parser::ParseSimpleAsm(SourceLocation *EndLoc) {
1286  assert(Tok.is(tok::kw_asm) && "Not an asm!");
1287  SourceLocation Loc = ConsumeToken();
1288 
1289  if (Tok.is(tok::kw_volatile)) {
1290  // Remove from the end of 'asm' to the end of 'volatile'.
1291  SourceRange RemovalRange(PP.getLocForEndOfToken(Loc),
1292  PP.getLocForEndOfToken(Tok.getLocation()));
1293 
1294  Diag(Tok, diag::warn_file_asm_volatile)
1295  << FixItHint::CreateRemoval(RemovalRange);
1296  ConsumeToken();
1297  }
1298 
1299  BalancedDelimiterTracker T(*this, tok::l_paren);
1300  if (T.consumeOpen()) {
1301  Diag(Tok, diag::err_expected_lparen_after) << "asm";
1302  return ExprError();
1303  }
1304 
1305  ExprResult Result(ParseAsmStringLiteral());
1306 
1307  if (!Result.isInvalid()) {
1308  // Close the paren and get the location of the end bracket
1309  T.consumeClose();
1310  if (EndLoc)
1311  *EndLoc = T.getCloseLocation();
1312  } else if (SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch)) {
1313  if (EndLoc)
1314  *EndLoc = Tok.getLocation();
1315  ConsumeParen();
1316  }
1317 
1318  return Result;
1319 }
1320 
1321 /// \brief Get the TemplateIdAnnotation from the token and put it in the
1322 /// cleanup pool so that it gets destroyed when parsing the current top level
1323 /// declaration is finished.
1324 TemplateIdAnnotation *Parser::takeTemplateIdAnnotation(const Token &tok) {
1325  assert(tok.is(tok::annot_template_id) && "Expected template-id token");
1327  Id = static_cast<TemplateIdAnnotation *>(tok.getAnnotationValue());
1328  return Id;
1329 }
1330 
1331 void Parser::AnnotateScopeToken(CXXScopeSpec &SS, bool IsNewAnnotation) {
1332  // Push the current token back into the token stream (or revert it if it is
1333  // cached) and use an annotation scope token for current token.
1334  if (PP.isBacktrackEnabled())
1335  PP.RevertCachedTokens(1);
1336  else
1337  PP.EnterToken(Tok);
1338  Tok.setKind(tok::annot_cxxscope);
1340  Tok.setAnnotationRange(SS.getRange());
1341 
1342  // In case the tokens were cached, have Preprocessor replace them
1343  // with the annotation token. We don't need to do this if we've
1344  // just reverted back to a prior state.
1345  if (IsNewAnnotation)
1346  PP.AnnotateCachedTokens(Tok);
1347 }
1348 
1349 /// \brief Attempt to classify the name at the current token position. This may
1350 /// form a type, scope or primary expression annotation, or replace the token
1351 /// with a typo-corrected keyword. This is only appropriate when the current
1352 /// name must refer to an entity which has already been declared.
1353 ///
1354 /// \param IsAddressOfOperand Must be \c true if the name is preceded by an '&'
1355 /// and might possibly have a dependent nested name specifier.
1356 /// \param CCC Indicates how to perform typo-correction for this name. If NULL,
1357 /// no typo correction will be performed.
1358 Parser::AnnotatedNameKind
1359 Parser::TryAnnotateName(bool IsAddressOfOperand,
1360  std::unique_ptr<CorrectionCandidateCallback> CCC) {
1361  assert(Tok.is(tok::identifier) || Tok.is(tok::annot_cxxscope));
1362 
1363  const bool EnteringContext = false;
1364  const bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
1365 
1366  CXXScopeSpec SS;
1367  if (getLangOpts().CPlusPlus &&
1368  ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
1369  return ANK_Error;
1370 
1371  if (Tok.isNot(tok::identifier) || SS.isInvalid()) {
1372  if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, false, SS,
1373  !WasScopeAnnotation))
1374  return ANK_Error;
1375  return ANK_Unresolved;
1376  }
1377 
1378  IdentifierInfo *Name = Tok.getIdentifierInfo();
1379  SourceLocation NameLoc = Tok.getLocation();
1380 
1381  // FIXME: Move the tentative declaration logic into ClassifyName so we can
1382  // typo-correct to tentatively-declared identifiers.
1383  if (isTentativelyDeclared(Name)) {
1384  // Identifier has been tentatively declared, and thus cannot be resolved as
1385  // an expression. Fall back to annotating it as a type.
1386  if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, false, SS,
1387  !WasScopeAnnotation))
1388  return ANK_Error;
1389  return Tok.is(tok::annot_typename) ? ANK_Success : ANK_TentativeDecl;
1390  }
1391 
1392  Token Next = NextToken();
1393 
1394  // Look up and classify the identifier. We don't perform any typo-correction
1395  // after a scope specifier, because in general we can't recover from typos
1396  // there (eg, after correcting 'A::tempalte B<X>::C' [sic], we would need to
1397  // jump back into scope specifier parsing).
1398  Sema::NameClassification Classification = Actions.ClassifyName(
1399  getCurScope(), SS, Name, NameLoc, Next, IsAddressOfOperand,
1400  SS.isEmpty() ? std::move(CCC) : nullptr);
1401 
1402  switch (Classification.getKind()) {
1403  case Sema::NC_Error:
1404  return ANK_Error;
1405 
1406  case Sema::NC_Keyword:
1407  // The identifier was typo-corrected to a keyword.
1408  Tok.setIdentifierInfo(Name);
1409  Tok.setKind(Name->getTokenID());
1410  PP.TypoCorrectToken(Tok);
1411  if (SS.isNotEmpty())
1412  AnnotateScopeToken(SS, !WasScopeAnnotation);
1413  // We've "annotated" this as a keyword.
1414  return ANK_Success;
1415 
1416  case Sema::NC_Unknown:
1417  // It's not something we know about. Leave it unannotated.
1418  break;
1419 
1420  case Sema::NC_Type: {
1421  SourceLocation BeginLoc = NameLoc;
1422  if (SS.isNotEmpty())
1423  BeginLoc = SS.getBeginLoc();
1424 
1425  /// An Objective-C object type followed by '<' is a specialization of
1426  /// a parameterized class type or a protocol-qualified type.
1427  ParsedType Ty = Classification.getType();
1428  if (getLangOpts().ObjC1 && NextToken().is(tok::less) &&
1429  (Ty.get()->isObjCObjectType() ||
1430  Ty.get()->isObjCObjectPointerType())) {
1431  // Consume the name.
1433  SourceLocation NewEndLoc;
1434  TypeResult NewType
1435  = parseObjCTypeArgsAndProtocolQualifiers(IdentifierLoc, Ty,
1436  /*consumeLastToken=*/false,
1437  NewEndLoc);
1438  if (NewType.isUsable())
1439  Ty = NewType.get();
1440  }
1441 
1442  Tok.setKind(tok::annot_typename);
1443  setTypeAnnotation(Tok, Ty);
1444  Tok.setAnnotationEndLoc(Tok.getLocation());
1445  Tok.setLocation(BeginLoc);
1446  PP.AnnotateCachedTokens(Tok);
1447  return ANK_Success;
1448  }
1449 
1450  case Sema::NC_Expression:
1451  Tok.setKind(tok::annot_primary_expr);
1452  setExprAnnotation(Tok, Classification.getExpression());
1453  Tok.setAnnotationEndLoc(NameLoc);
1454  if (SS.isNotEmpty())
1455  Tok.setLocation(SS.getBeginLoc());
1456  PP.AnnotateCachedTokens(Tok);
1457  return ANK_Success;
1458 
1459  case Sema::NC_TypeTemplate:
1460  if (Next.isNot(tok::less)) {
1461  // This may be a type template being used as a template template argument.
1462  if (SS.isNotEmpty())
1463  AnnotateScopeToken(SS, !WasScopeAnnotation);
1464  return ANK_TemplateName;
1465  }
1466  // Fall through.
1467  case Sema::NC_VarTemplate:
1469  // We have a type, variable or function template followed by '<'.
1470  ConsumeToken();
1471  UnqualifiedId Id;
1472  Id.setIdentifier(Name, NameLoc);
1473  if (AnnotateTemplateIdToken(
1474  TemplateTy::make(Classification.getTemplateName()),
1475  Classification.getTemplateNameKind(), SS, SourceLocation(), Id))
1476  return ANK_Error;
1477  return ANK_Success;
1478  }
1479 
1481  llvm_unreachable("already parsed nested name specifier");
1482  }
1483 
1484  // Unable to classify the name, but maybe we can annotate a scope specifier.
1485  if (SS.isNotEmpty())
1486  AnnotateScopeToken(SS, !WasScopeAnnotation);
1487  return ANK_Unresolved;
1488 }
1489 
1490 bool Parser::TryKeywordIdentFallback(bool DisableKeyword) {
1491  assert(Tok.isNot(tok::identifier));
1492  Diag(Tok, diag::ext_keyword_as_ident)
1493  << PP.getSpelling(Tok)
1494  << DisableKeyword;
1495  if (DisableKeyword)
1497  Tok.setKind(tok::identifier);
1498  return true;
1499 }
1500 
1501 /// TryAnnotateTypeOrScopeToken - If the current token position is on a
1502 /// typename (possibly qualified in C++) or a C++ scope specifier not followed
1503 /// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens
1504 /// with a single annotation token representing the typename or C++ scope
1505 /// respectively.
1506 /// This simplifies handling of C++ scope specifiers and allows efficient
1507 /// backtracking without the need to re-parse and resolve nested-names and
1508 /// typenames.
1509 /// It will mainly be called when we expect to treat identifiers as typenames
1510 /// (if they are typenames). For example, in C we do not expect identifiers
1511 /// inside expressions to be treated as typenames so it will not be called
1512 /// for expressions in C.
1513 /// The benefit for C/ObjC is that a typename will be annotated and
1514 /// Actions.getTypeName will not be needed to be called again (e.g. getTypeName
1515 /// will not be called twice, once to check whether we have a declaration
1516 /// specifier, and another one to get the actual type inside
1517 /// ParseDeclarationSpecifiers).
1518 ///
1519 /// This returns true if an error occurred.
1520 ///
1521 /// Note that this routine emits an error if you call it with ::new or ::delete
1522 /// as the current tokens, so only call it in contexts where these are invalid.
1523 bool Parser::TryAnnotateTypeOrScopeToken(bool EnteringContext, bool NeedType) {
1524  assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
1525  Tok.is(tok::kw_typename) || Tok.is(tok::annot_cxxscope) ||
1526  Tok.is(tok::kw_decltype) || Tok.is(tok::annot_template_id) ||
1527  Tok.is(tok::kw___super)) &&
1528  "Cannot be a type or scope token!");
1529 
1530  if (Tok.is(tok::kw_typename)) {
1531  // MSVC lets you do stuff like:
1532  // typename typedef T_::D D;
1533  //
1534  // We will consume the typedef token here and put it back after we have
1535  // parsed the first identifier, transforming it into something more like:
1536  // typename T_::D typedef D;
1537  if (getLangOpts().MSVCCompat && NextToken().is(tok::kw_typedef)) {
1538  Token TypedefToken;
1539  PP.Lex(TypedefToken);
1540  bool Result = TryAnnotateTypeOrScopeToken(EnteringContext, NeedType);
1541  PP.EnterToken(Tok);
1542  Tok = TypedefToken;
1543  if (!Result)
1544  Diag(Tok.getLocation(), diag::warn_expected_qualified_after_typename);
1545  return Result;
1546  }
1547 
1548  // Parse a C++ typename-specifier, e.g., "typename T::type".
1549  //
1550  // typename-specifier:
1551  // 'typename' '::' [opt] nested-name-specifier identifier
1552  // 'typename' '::' [opt] nested-name-specifier template [opt]
1553  // simple-template-id
1554  SourceLocation TypenameLoc = ConsumeToken();
1555  CXXScopeSpec SS;
1556  if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/ParsedType(),
1557  /*EnteringContext=*/false,
1558  nullptr, /*IsTypename*/ true))
1559  return true;
1560  if (!SS.isSet()) {
1561  if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id) ||
1562  Tok.is(tok::annot_decltype)) {
1563  // Attempt to recover by skipping the invalid 'typename'
1564  if (Tok.is(tok::annot_decltype) ||
1565  (!TryAnnotateTypeOrScopeToken(EnteringContext, NeedType) &&
1566  Tok.isAnnotation())) {
1567  unsigned DiagID = diag::err_expected_qualified_after_typename;
1568  // MS compatibility: MSVC permits using known types with typename.
1569  // e.g. "typedef typename T* pointer_type"
1570  if (getLangOpts().MicrosoftExt)
1571  DiagID = diag::warn_expected_qualified_after_typename;
1572  Diag(Tok.getLocation(), DiagID);
1573  return false;
1574  }
1575  }
1576 
1577  Diag(Tok.getLocation(), diag::err_expected_qualified_after_typename);
1578  return true;
1579  }
1580 
1581  TypeResult Ty;
1582  if (Tok.is(tok::identifier)) {
1583  // FIXME: check whether the next token is '<', first!
1584  Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
1585  *Tok.getIdentifierInfo(),
1586  Tok.getLocation());
1587  } else if (Tok.is(tok::annot_template_id)) {
1588  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1589  if (TemplateId->Kind != TNK_Type_template &&
1590  TemplateId->Kind != TNK_Dependent_template_name) {
1591  Diag(Tok, diag::err_typename_refers_to_non_type_template)
1592  << Tok.getAnnotationRange();
1593  return true;
1594  }
1595 
1596  ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
1597  TemplateId->NumArgs);
1598 
1599  Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
1600  TemplateId->TemplateKWLoc,
1601  TemplateId->Template,
1602  TemplateId->TemplateNameLoc,
1603  TemplateId->LAngleLoc,
1604  TemplateArgsPtr,
1605  TemplateId->RAngleLoc);
1606  } else {
1607  Diag(Tok, diag::err_expected_type_name_after_typename)
1608  << SS.getRange();
1609  return true;
1610  }
1611 
1612  SourceLocation EndLoc = Tok.getLastLoc();
1613  Tok.setKind(tok::annot_typename);
1614  setTypeAnnotation(Tok, Ty.isInvalid() ? ParsedType() : Ty.get());
1615  Tok.setAnnotationEndLoc(EndLoc);
1616  Tok.setLocation(TypenameLoc);
1617  PP.AnnotateCachedTokens(Tok);
1618  return false;
1619  }
1620 
1621  // Remembers whether the token was originally a scope annotation.
1622  bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
1623 
1624  CXXScopeSpec SS;
1625  if (getLangOpts().CPlusPlus)
1626  if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
1627  return true;
1628 
1629  return TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, NeedType,
1630  SS, !WasScopeAnnotation);
1631 }
1632 
1633 /// \brief Try to annotate a type or scope token, having already parsed an
1634 /// optional scope specifier. \p IsNewScope should be \c true unless the scope
1635 /// specifier was extracted from an existing tok::annot_cxxscope annotation.
1637  bool NeedType,
1638  CXXScopeSpec &SS,
1639  bool IsNewScope) {
1640  if (Tok.is(tok::identifier)) {
1641  IdentifierInfo *CorrectedII = nullptr;
1642  // Determine whether the identifier is a type name.
1643  if (ParsedType Ty = Actions.getTypeName(*Tok.getIdentifierInfo(),
1644  Tok.getLocation(), getCurScope(),
1645  &SS, false,
1646  NextToken().is(tok::period),
1647  ParsedType(),
1648  /*IsCtorOrDtorName=*/false,
1649  /*NonTrivialTypeSourceInfo*/ true,
1650  NeedType ? &CorrectedII
1651  : nullptr)) {
1652  // A FixIt was applied as a result of typo correction
1653  if (CorrectedII)
1654  Tok.setIdentifierInfo(CorrectedII);
1655 
1656  SourceLocation BeginLoc = Tok.getLocation();
1657  if (SS.isNotEmpty()) // it was a C++ qualified type name.
1658  BeginLoc = SS.getBeginLoc();
1659 
1660  /// An Objective-C object type followed by '<' is a specialization of
1661  /// a parameterized class type or a protocol-qualified type.
1662  if (getLangOpts().ObjC1 && NextToken().is(tok::less) &&
1663  (Ty.get()->isObjCObjectType() ||
1664  Ty.get()->isObjCObjectPointerType())) {
1665  // Consume the name.
1666  SourceLocation IdentifierLoc = ConsumeToken();
1667  SourceLocation NewEndLoc;
1668  TypeResult NewType
1669  = parseObjCTypeArgsAndProtocolQualifiers(IdentifierLoc, Ty,
1670  /*consumeLastToken=*/false,
1671  NewEndLoc);
1672  if (NewType.isUsable())
1673  Ty = NewType.get();
1674  }
1675 
1676  // This is a typename. Replace the current token in-place with an
1677  // annotation type token.
1678  Tok.setKind(tok::annot_typename);
1679  setTypeAnnotation(Tok, Ty);
1680  Tok.setAnnotationEndLoc(Tok.getLocation());
1681  Tok.setLocation(BeginLoc);
1682 
1683  // In case the tokens were cached, have Preprocessor replace
1684  // them with the annotation token.
1685  PP.AnnotateCachedTokens(Tok);
1686  return false;
1687  }
1688 
1689  if (!getLangOpts().CPlusPlus) {
1690  // If we're in C, we can't have :: tokens at all (the lexer won't return
1691  // them). If the identifier is not a type, then it can't be scope either,
1692  // just early exit.
1693  return false;
1694  }
1695 
1696  // If this is a template-id, annotate with a template-id or type token.
1697  if (NextToken().is(tok::less)) {
1698  TemplateTy Template;
1700  TemplateName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
1701  bool MemberOfUnknownSpecialization;
1702  if (TemplateNameKind TNK
1703  = Actions.isTemplateName(getCurScope(), SS,
1704  /*hasTemplateKeyword=*/false, TemplateName,
1705  /*ObjectType=*/ ParsedType(),
1706  EnteringContext,
1707  Template, MemberOfUnknownSpecialization)) {
1708  // Consume the identifier.
1709  ConsumeToken();
1710  if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(),
1711  TemplateName)) {
1712  // If an unrecoverable error occurred, we need to return true here,
1713  // because the token stream is in a damaged state. We may not return
1714  // a valid identifier.
1715  return true;
1716  }
1717  }
1718  }
1719 
1720  // The current token, which is either an identifier or a
1721  // template-id, is not part of the annotation. Fall through to
1722  // push that token back into the stream and complete the C++ scope
1723  // specifier annotation.
1724  }
1725 
1726  if (Tok.is(tok::annot_template_id)) {
1727  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1728  if (TemplateId->Kind == TNK_Type_template) {
1729  // A template-id that refers to a type was parsed into a
1730  // template-id annotation in a context where we weren't allowed
1731  // to produce a type annotation token. Update the template-id
1732  // annotation token to a type annotation token now.
1733  AnnotateTemplateIdTokenAsType();
1734  return false;
1735  }
1736  }
1737 
1738  if (SS.isEmpty())
1739  return false;
1740 
1741  // A C++ scope specifier that isn't followed by a typename.
1742  AnnotateScopeToken(SS, IsNewScope);
1743  return false;
1744 }
1745 
1746 /// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only
1747 /// annotates C++ scope specifiers and template-ids. This returns
1748 /// true if there was an error that could not be recovered from.
1749 ///
1750 /// Note that this routine emits an error if you call it with ::new or ::delete
1751 /// as the current tokens, so only call it in contexts where these are invalid.
1752 bool Parser::TryAnnotateCXXScopeToken(bool EnteringContext) {
1753  assert(getLangOpts().CPlusPlus &&
1754  "Call sites of this function should be guarded by checking for C++");
1755  assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
1756  (Tok.is(tok::annot_template_id) && NextToken().is(tok::coloncolon)) ||
1757  Tok.is(tok::kw_decltype) || Tok.is(tok::kw___super)) &&
1758  "Cannot be a type or scope token!");
1759 
1760  CXXScopeSpec SS;
1761  if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
1762  return true;
1763  if (SS.isEmpty())
1764  return false;
1765 
1766  AnnotateScopeToken(SS, true);
1767  return false;
1768 }
1769 
1770 bool Parser::isTokenEqualOrEqualTypo() {
1771  tok::TokenKind Kind = Tok.getKind();
1772  switch (Kind) {
1773  default:
1774  return false;
1775  case tok::ampequal: // &=
1776  case tok::starequal: // *=
1777  case tok::plusequal: // +=
1778  case tok::minusequal: // -=
1779  case tok::exclaimequal: // !=
1780  case tok::slashequal: // /=
1781  case tok::percentequal: // %=
1782  case tok::lessequal: // <=
1783  case tok::lesslessequal: // <<=
1784  case tok::greaterequal: // >=
1785  case tok::greatergreaterequal: // >>=
1786  case tok::caretequal: // ^=
1787  case tok::pipeequal: // |=
1788  case tok::equalequal: // ==
1789  Diag(Tok, diag::err_invalid_token_after_declarator_suggest_equal)
1790  << Kind
1792  case tok::equal:
1793  return true;
1794  }
1795 }
1796 
1797 SourceLocation Parser::handleUnexpectedCodeCompletionToken() {
1798  assert(Tok.is(tok::code_completion));
1799  PrevTokLocation = Tok.getLocation();
1800 
1801  for (Scope *S = getCurScope(); S; S = S->getParent()) {
1802  if (S->getFlags() & Scope::FnScope) {
1805  cutOffParsing();
1806  return PrevTokLocation;
1807  }
1808 
1809  if (S->getFlags() & Scope::ClassScope) {
1811  cutOffParsing();
1812  return PrevTokLocation;
1813  }
1814  }
1815 
1816  Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Namespace);
1817  cutOffParsing();
1818  return PrevTokLocation;
1819 }
1820 
1821 // Code-completion pass-through functions
1822 
1823 void Parser::CodeCompleteDirective(bool InConditional) {
1824  Actions.CodeCompletePreprocessorDirective(InConditional);
1825 }
1826 
1827 void Parser::CodeCompleteInConditionalExclusion() {
1829 }
1830 
1831 void Parser::CodeCompleteMacroName(bool IsDefinition) {
1832  Actions.CodeCompletePreprocessorMacroName(IsDefinition);
1833 }
1834 
1835 void Parser::CodeCompletePreprocessorExpression() {
1837 }
1838 
1839 void Parser::CodeCompleteMacroArgument(IdentifierInfo *Macro,
1841  unsigned ArgumentIndex) {
1842  Actions.CodeCompletePreprocessorMacroArgument(getCurScope(), Macro, MacroInfo,
1843  ArgumentIndex);
1844 }
1845 
1846 void Parser::CodeCompleteNaturalLanguage() {
1847  Actions.CodeCompleteNaturalLanguage();
1848 }
1849 
1850 bool Parser::ParseMicrosoftIfExistsCondition(IfExistsCondition& Result) {
1851  assert((Tok.is(tok::kw___if_exists) || Tok.is(tok::kw___if_not_exists)) &&
1852  "Expected '__if_exists' or '__if_not_exists'");
1853  Result.IsIfExists = Tok.is(tok::kw___if_exists);
1854  Result.KeywordLoc = ConsumeToken();
1855 
1856  BalancedDelimiterTracker T(*this, tok::l_paren);
1857  if (T.consumeOpen()) {
1858  Diag(Tok, diag::err_expected_lparen_after)
1859  << (Result.IsIfExists? "__if_exists" : "__if_not_exists");
1860  return true;
1861  }
1862 
1863  // Parse nested-name-specifier.
1864  if (getLangOpts().CPlusPlus)
1865  ParseOptionalCXXScopeSpecifier(Result.SS, ParsedType(),
1866  /*EnteringContext=*/false);
1867 
1868  // Check nested-name specifier.
1869  if (Result.SS.isInvalid()) {
1870  T.skipToEnd();
1871  return true;
1872  }
1873 
1874  // Parse the unqualified-id.
1875  SourceLocation TemplateKWLoc; // FIXME: parsed, but unused.
1876  if (ParseUnqualifiedId(Result.SS, false, true, true, ParsedType(),
1877  TemplateKWLoc, Result.Name)) {
1878  T.skipToEnd();
1879  return true;
1880  }
1881 
1882  if (T.consumeClose())
1883  return true;
1884 
1885  // Check if the symbol exists.
1886  switch (Actions.CheckMicrosoftIfExistsSymbol(getCurScope(), Result.KeywordLoc,
1887  Result.IsIfExists, Result.SS,
1888  Result.Name)) {
1889  case Sema::IER_Exists:
1890  Result.Behavior = Result.IsIfExists ? IEB_Parse : IEB_Skip;
1891  break;
1892 
1894  Result.Behavior = !Result.IsIfExists ? IEB_Parse : IEB_Skip;
1895  break;
1896 
1897  case Sema::IER_Dependent:
1898  Result.Behavior = IEB_Dependent;
1899  break;
1900 
1901  case Sema::IER_Error:
1902  return true;
1903  }
1904 
1905  return false;
1906 }
1907 
1908 void Parser::ParseMicrosoftIfExistsExternalDeclaration() {
1909  IfExistsCondition Result;
1910  if (ParseMicrosoftIfExistsCondition(Result))
1911  return;
1912 
1913  BalancedDelimiterTracker Braces(*this, tok::l_brace);
1914  if (Braces.consumeOpen()) {
1915  Diag(Tok, diag::err_expected) << tok::l_brace;
1916  return;
1917  }
1918 
1919  switch (Result.Behavior) {
1920  case IEB_Parse:
1921  // Parse declarations below.
1922  break;
1923 
1924  case IEB_Dependent:
1925  llvm_unreachable("Cannot have a dependent external declaration");
1926 
1927  case IEB_Skip:
1928  Braces.skipToEnd();
1929  return;
1930  }
1931 
1932  // Parse the declarations.
1933  // FIXME: Support module import within __if_exists?
1934  while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
1935  ParsedAttributesWithRange attrs(AttrFactory);
1936  MaybeParseCXX11Attributes(attrs);
1937  MaybeParseMicrosoftAttributes(attrs);
1938  DeclGroupPtrTy Result = ParseExternalDeclaration(attrs);
1939  if (Result && !getCurScope()->getParent())
1940  Actions.getASTConsumer().HandleTopLevelDecl(Result.get());
1941  }
1942  Braces.consumeClose();
1943 }
1944 
1945 Parser::DeclGroupPtrTy Parser::ParseModuleImport(SourceLocation AtLoc) {
1946  assert(Tok.isObjCAtKeyword(tok::objc_import) &&
1947  "Improper start to module import");
1948  SourceLocation ImportLoc = ConsumeToken();
1949 
1951 
1952  // Parse the module path.
1953  do {
1954  if (!Tok.is(tok::identifier)) {
1955  if (Tok.is(tok::code_completion)) {
1956  Actions.CodeCompleteModuleImport(ImportLoc, Path);
1957  cutOffParsing();
1958  return DeclGroupPtrTy();
1959  }
1960 
1961  Diag(Tok, diag::err_module_expected_ident);
1962  SkipUntil(tok::semi);
1963  return DeclGroupPtrTy();
1964  }
1965 
1966  // Record this part of the module path.
1967  Path.push_back(std::make_pair(Tok.getIdentifierInfo(), Tok.getLocation()));
1968  ConsumeToken();
1969 
1970  if (Tok.is(tok::period)) {
1971  ConsumeToken();
1972  continue;
1973  }
1974 
1975  break;
1976  } while (true);
1977 
1978  if (PP.hadModuleLoaderFatalFailure()) {
1979  // With a fatal failure in the module loader, we abort parsing.
1980  cutOffParsing();
1981  return DeclGroupPtrTy();
1982  }
1983 
1984  DeclResult Import = Actions.ActOnModuleImport(AtLoc, ImportLoc, Path);
1985  ExpectAndConsumeSemi(diag::err_module_expected_semi);
1986  if (Import.isInvalid())
1987  return DeclGroupPtrTy();
1988 
1989  return Actions.ConvertDeclToDeclGroup(Import.get());
1990 }
1991 
1992 bool BalancedDelimiterTracker::diagnoseOverflow() {
1993  P.Diag(P.Tok, diag::err_bracket_depth_exceeded)
1994  << P.getLangOpts().BracketDepth;
1995  P.Diag(P.Tok, diag::note_bracket_depth);
1996  P.cutOffParsing();
1997  return true;
1998 }
1999 
2001  const char *Msg,
2002  tok::TokenKind SkipToTok) {
2003  LOpen = P.Tok.getLocation();
2004  if (P.ExpectAndConsume(Kind, DiagID, Msg)) {
2005  if (SkipToTok != tok::unknown)
2006  P.SkipUntil(SkipToTok, Parser::StopAtSemi);
2007  return true;
2008  }
2009 
2010  if (getDepth() < MaxDepth)
2011  return false;
2012 
2013  return diagnoseOverflow();
2014 }
2015 
2016 bool BalancedDelimiterTracker::diagnoseMissingClose() {
2017  assert(!P.Tok.is(Close) && "Should have consumed closing delimiter");
2018 
2019  P.Diag(P.Tok, diag::err_expected) << Close;
2020  P.Diag(LOpen, diag::note_matching) << Kind;
2021 
2022  // If we're not already at some kind of closing bracket, skip to our closing
2023  // token.
2024  if (P.Tok.isNot(tok::r_paren) && P.Tok.isNot(tok::r_brace) &&
2025  P.Tok.isNot(tok::r_square) &&
2026  P.SkipUntil(Close, FinalToken,
2028  P.Tok.is(Close))
2029  LClose = P.ConsumeAnyToken();
2030  return true;
2031 }
2032 
2034  P.SkipUntil(Close, Parser::StopBeforeMatch);
2035  consumeClose();
2036 }
MutableArrayRef< TemplateParameterList * > MultiTemplateParamsArg
Definition: Ownership.h:265
bool isAtStartOfLine() const
Definition: Token.h:261
SourceLocation getThreadStorageClassSpecLoc() const
Definition: DeclSpec.h:452
Defines the clang::ASTContext interface.
SourceLocation getEnd() const
DeclaratorChunk::FunctionTypeInfo & getFunctionTypeInfo()
Definition: DeclSpec.h:2039
This is a scope that corresponds to the parameters within a function prototype.
Definition: Scope.h:79
bool isInvalid() const
Definition: Ownership.h:159
void Initialize()
Perform initialization that occurs after the parser has been initialized but before it parses anythin...
Definition: Sema.cpp:141
Code completion occurs within a class, struct, or union.
Definition: Sema.h:8591
const LangOptions & getLangOpts() const
Definition: Parse/Parser.h:243
const Scope * getParent() const
Definition: Scope.h:215
IdentifierInfo * getIdentifierInfo(StringRef Name) const
Definition: Preprocessor.h:922
Defines the C++ template declaration subclasses.
SCS getStorageClassSpec() const
Definition: DeclSpec.h:442
void CodeCompleteNaturalLanguage()
PtrTy get() const
Definition: Ownership.h:163
bool TryAnnotateCXXScopeToken(bool EnteringContext=false)
This indicates that the scope corresponds to a function, which means that labels are set here...
Definition: Scope.h:45
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1118
static const char * getSpecifierName(DeclSpec::TST T, const PrintingPolicy &Policy)
Turn a type-specifier-type into a string like "_Bool" or "union".
Definition: DeclSpec.cpp:446
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:83
TemplateNameKind Kind
The kind of template that Template refers to.
Wrapper for void* pointer.
Definition: Ownership.h:45
void * SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS)
Given a C++ nested-name-specifier, produce an annotation value that the parser can use later to recon...
void ActOnDefaultCtorInitializers(Decl *CDtorDecl)
static const TSCS TSCS_unspecified
Definition: DeclSpec.h:251
void EnterToken(const Token &Tok)
Enters a token in the token stream to be lexed next.
Information about one declarator, including the parsed type information and the identifier.
Definition: DeclSpec.h:1572
TypeSpecifierType
Specifies the kind of type.
Definition: Specifiers.h:39
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:35
Code completion occurs within an Objective-C implementation or category implementation.
Definition: Sema.h:8597
RAII object that makes sure paren/bracket/brace count is correct after declaration/statement parsing...
Decl * ActOnParamDeclarator(Scope *S, Declarator &D)
Definition: SemaDecl.cpp:10097
const ParsingDeclSpec & getDeclSpec() const
friend class ObjCDeclContextSwitch
Definition: Parse/Parser.h:60
void MarkAsLateParsedTemplate(FunctionDecl *FD, Decl *FnD, CachedTokens &Toks)
StringRef getSpelling(SourceLocation loc, SmallVectorImpl< char > &buffer, bool *invalid=nullptr) const
bool isEmpty() const
No scope specifier.
Definition: DeclSpec.h:194
bool SkipUntil(tok::TokenKind T, SkipUntilFlags Flags=static_cast< SkipUntilFlags >(0))
Definition: Parse/Parser.h:861
Information about a template-id annotation token.
void CodeCompleteOrdinaryName(Scope *S, ParserCompletionContext CompletionContext)
const Token & NextToken()
Definition: Parse/Parser.h:546
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: Parse/Parser.h:292
void SetPoisonReason(IdentifierInfo *II, unsigned DiagID)
Specifies the reason for poisoning an identifier.
OpaquePtr< QualType > ParsedType
Definition: Ownership.h:233
DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType=nullptr)
Definition: SemaDecl.cpp:54
bool isFileID() const
bool isEmpty() const
Definition: DeclSpec.h:592
void ActOnEndOfTranslationUnit()
Definition: Sema.cpp:642
bool isTranslationUnit() const
Definition: DeclBase.h:1243
void CodeCompletePreprocessorMacroArgument(Scope *S, IdentifierInfo *Macro, MacroInfo *MacroInfo, unsigned Argument)
void setKind(tok::TokenKind K)
Definition: Token.h:91
RAII class that helps handle the parsing of an open/close delimiter pair, such as braces { ...
void removeCommentHandler(CommentHandler *Handler)
Remove the specified comment handler.
void ClearStorageClassSpecs()
Definition: DeclSpec.h:456
Describes a module or submodule.
Definition: Basic/Module.h:49
Code completion occurs at top-level or namespace context.
Definition: Sema.h:8589
static bool HasFlagsSet(Parser::SkipUntilFlags L, Parser::SkipUntilFlags R)
Code completion occurs within the body of a function on a recovery path, where we do not have a speci...
Definition: Sema.h:8621
Represents a C++ unqualified-id that has been parsed.
Definition: DeclSpec.h:869
ParsedType getTypeName(const IdentifierInfo &II, SourceLocation NameLoc, Scope *S, CXXScopeSpec *SS=nullptr, bool isClassName=false, bool HasTrailingDot=false, ParsedType ObjectType=ParsedType(), bool IsCtorOrDtorName=false, bool WantNontrivialTypeSourceInfo=false, IdentifierInfo **CorrectedII=nullptr)
If the identifier refers to a type name within this scope, return the declaration of that type...
Definition: SemaDecl.cpp:241
void SetRangeBegin(SourceLocation Loc)
Definition: DeclSpec.h:1714
tok::TokenKind getTokenID() const
void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path)
ParsedTemplateArgument * getTemplateArgs()
Retrieves a pointer to the template arguments.
bool hadModuleLoaderFatalFailure() const
Definition: Preprocessor.h:706
IfExistsResult CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, const DeclarationNameInfo &TargetNameInfo)
void ActOnModuleInclude(SourceLocation DirectiveLoc, Module *Mod)
The parser has processed a module import translated from a #include or similar preprocessing directiv...
Definition: SemaDecl.cpp:14320
Decl * ActOnFileScopeAsmDecl(Expr *expr, SourceLocation AsmLoc, SourceLocation RParenLoc)
Definition: SemaDecl.cpp:14235
Represents a C++ nested-name-specifier or a global scope specifier.
Definition: DeclSpec.h:68
tok::TokenKind getKind() const
Definition: Token.h:90
void setCodeCompletionHandler(CodeCompletionHandler &Handler)
Set the code completion handler to the given object.
Definition: Preprocessor.h:957
Decl * ActOnFinishFunctionBody(Decl *Decl, Stmt *Body)
Definition: SemaDecl.cpp:10726
const SourceRange & getSourceRange() const LLVM_READONLY
Definition: DeclSpec.h:496
bool isInvalid() const
AnnotatingParser & P
void * getAnnotationValue() const
Definition: Token.h:224
An error occurred.
Definition: Sema.h:3969
Decl * ActOnStartOfFunctionDef(Scope *S, Declarator &D)
Definition: SemaDecl.cpp:10373
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:258
Decl * ActOnEmptyDeclaration(Scope *S, AttributeList *AttrList, SourceLocation SemiLoc)
Handle a C++11 empty-declaration and attribute-declaration.
bool isFunctionDeclarator(unsigned &idx) const
Definition: DeclSpec.h:2009
A little helper class used to produce diagnostics.
Definition: Diagnostic.h:866
A class for parsing a declarator.
void clearCodeCompletionHandler()
Clear out the code completion handler.
Definition: Preprocessor.h:967
NameClassificationKind getKind() const
Definition: Sema.h:1532
Stop at code completion.
Definition: Parse/Parser.h:844
void setAnnotationRange(SourceRange R)
Definition: Token.h:161
SourceRange getAnnotationRange() const
SourceRange of the group of tokens that this annotation token represents.
Definition: Token.h:158
void setAnnotationValue(void *val)
Definition: Token.h:228
TemplateNameKind getTemplateNameKind() const
Definition: Sema.h:1550
void AnnotateCachedTokens(const Token &Tok)
This file defines the classes used to store parsed information about declaration-specifiers and decla...
void RevertCachedTokens(unsigned N)
When backtracking is enabled and tokens are cached, this allows to revert a specific number of tokens...
Represents a C++ template name within the type system.
Definition: TemplateName.h:175
void CodeCompletePreprocessorExpression()
const char * getPunctuatorSpelling(TokenKind Kind) LLVM_READNONE
Determines the spelling of simple punctuation tokens like '!' or '', and returns NULL for literal and...
Definition: TokenKinds.cpp:32
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:124
TemplateNameKind
Specifies the kind of template name that an identifier refers to. Be careful when changing this: this...
Definition: TemplateKinds.h:21
bool isNot(tok::TokenKind K) const
Definition: Token.h:96
const SourceRange & getRange() const
Definition: DeclSpec.h:73
static const TST TST_int
Definition: DeclSpec.h:283
void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc)
Wraps an identifier and optional source location for the identifier.
Definition: AttributeList.h:50
TemplateNameKind isTemplateName(Scope *S, CXXScopeSpec &SS, bool hasTemplateKeyword, UnqualifiedId &Name, ParsedType ObjectType, bool EnteringContext, TemplateTy &Template, bool &MemberOfUnknownSpecialization)
The symbol exists.
Definition: Sema.h:3959
The result type of a method or function.
SourceLocation getStorageClassSpecLoc() const
Definition: DeclSpec.h:451
OpaquePtr< DeclGroupRef > DeclGroupPtrTy
Definition: Parse/Parser.h:259
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:486
NameClassification ClassifyName(Scope *S, CXXScopeSpec &SS, IdentifierInfo *&Name, SourceLocation NameLoc, const Token &NextToken, bool IsAddressOfOperand, std::unique_ptr< CorrectionCandidateCallback > CCC=nullptr)
Perform name lookup on the given name, classifying it based on the results of name lookup and the fol...
Definition: SemaDecl.cpp:731
This is a scope that corresponds to the parameters within a function prototype for a function declara...
Definition: Scope.h:85
A class for parsing a DeclSpec.
void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, SourceLocation LocAfterDecls)
Definition: SemaDecl.cpp:10337
#define false
Definition: stdbool.h:33
Kind
void TypoCorrectToken(const Token &Tok)
SmallVectorImpl< AnnotatedLine * >::const_iterator Next
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:172
bool ParseTopLevelDecl()
Definition: Parse/Parser.h:275
Encodes a location in the source. The SourceManager can decode this to get at the full include stack...
bool isIncrementalProcessingEnabled() const
Returns true if incremental processing is enabled.
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
bool isValid() const
Return true if this is a valid SourceLocation object.
void ExitScope()
ExitScope - Pop a scope off the scope stack.
ASTContext & getASTContext() const
Definition: Sema.h:1026
bool isCodeCompletionReached() const
Returns true if code-completion is enabled and we have hit the code-completion point.
Parser(Preprocessor &PP, Sema &Actions, bool SkipFunctionBodies)
void setAnnotationEndLoc(SourceLocation L)
Definition: Token.h:142
IdentifierTable & getIdentifierTable()
Definition: Preprocessor.h:685
Scope * getCurScope() const
Definition: Parse/Parser.h:250
bool isObjCAtKeyword(tok::ObjCKeywordKind objcKey) const
Return true if we have an ObjC keyword identifier.
Definition: Lexer.cpp:36
void setIdentifierInfo(IdentifierInfo *II)
Definition: Token.h:186
void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc)
bool canDelayFunctionBody(const Declarator &D)
Determine whether we can delay parsing the body of a function or function template until it is used...
Definition: SemaDecl.cpp:10682
void CodeCompletePreprocessorDirective(bool InConditional)
void Lex(Token &Result)
Lex the next token for this preprocessor.
void EnterScope(unsigned ScopeFlags)
EnterScope - Start a new scope.
bool isInvalid() const
An error occurred during parsing of the scope specifier.
Definition: DeclSpec.h:199
bool TryAnnotateTypeOrScopeTokenAfterScopeSpec(bool EnteringContext, bool NeedType, CXXScopeSpec &SS, bool IsNewScope)
Try to annotate a type or scope token, having already parsed an optional scope specifier. IsNewScope should be true unless the scope specifier was extracted from an existing tok::annot_cxxscope annotation.
SourceLocation getLastLoc() const
Definition: Token.h:147
virtual Stmt * getBody() const
Definition: DeclBase.h:840
ASTConsumer & getASTConsumer() const
Definition: Sema.h:1027
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:25
static bool IsCommonTypo(tok::TokenKind ExpectedTok, const Token &Tok)
void SetLateTemplateParser(LateTemplateParserCB *LTP, LateTemplateParserCleanupCB *LTPCleanup, void *P)
Definition: Sema.h:530
SourceLocation getBegin() const
SourceLocation getBeginLoc() const
Definition: DeclSpec.h:77
PtrTy get() const
Definition: Ownership.h:74
bool is(tok::TokenKind K) const
Definition: Token.h:95
The name is a dependent name, so the results will differ from one instantiation to the next...
Definition: Sema.h:3966
void Init(Scope *parent, unsigned flags)
Definition: Scope.cpp:21
bool ParseUnqualifiedId(CXXScopeSpec &SS, bool EnteringContext, bool AllowDestructorName, bool AllowConstructorName, ParsedType ObjectType, SourceLocation &TemplateKWLoc, UnqualifiedId &Result)
Parse a C++ unqualified-id (or a C identifier), which describes the name of an entity.
void CodeCompletePreprocessorMacroName(bool IsDefinition)
void setFunctionDefinitionKind(FunctionDefinitionKind Val)
Definition: DeclSpec.h:2178
The scope of a struct/union/class definition.
Definition: Scope.h:63
void RevertTokenIDToIdentifier()
Revert TokenID to tok::identifier; used for GNU libstdc++ 4.2 compatibility.
TSCS getThreadStorageClassSpec() const
Definition: DeclSpec.h:443
bool expectAndConsume(unsigned DiagID=diag::err_expected, const char *Msg="", tok::TokenKind SkipToTok=tok::unknown)
void addCommentHandler(CommentHandler *Handler)
Add the specified comment handler to the preprocessor.
void ActOnModuleBegin(SourceLocation DirectiveLoc, Module *Mod)
The parsed has entered a submodule.
Definition: SemaDecl.cpp:14347
bool hasTagDefinition() const
Definition: DeclSpec.cpp:353
static FixItHint CreateRemoval(CharSourceRange RemoveRange)
Create a code modification hint that removes the given source range.
Definition: Diagnostic.h:104
ParsingDeclSpec & getMutableDeclSpec() const
SkipUntilFlags
Control flags for SkipUntil functions.
Definition: Parse/Parser.h:840
TypeResult ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, const CXXScopeSpec &SS, const IdentifierInfo &II, SourceLocation IdLoc)
Called when the parser has parsed a C++ typename specifier, e.g., "typename T::type".
static const TST TST_unspecified
Definition: DeclSpec.h:277
Encapsulates the data about a macro definition (e.g. its tokens).
Definition: MacroInfo.h:34
bool isObjCObjectType() const
Definition: Type.h:5307
bool isNotEmpty() const
A scope specifier is present, but may be valid or invalid.
Definition: DeclSpec.h:196
ExprResult getExpression() const
Definition: Sema.h:1539
~Parser() override
IdentifierInfo * getName() const
void takeAttributesFrom(ParsedAttributes &attrs)
Definition: DeclSpec.h:738
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
bool isKnownToGCC() const
void CheckForFunctionRedefinition(FunctionDecl *FD, const FunctionDecl *EffectiveDefinition=nullptr)
Definition: SemaDecl.cpp:10443
bool isCodeCompletionEnabled() const
Determine if we are performing code completion.
TemplateName getTemplateName() const
Definition: Sema.h:1544
SourceLocation getLoc() const
static FixItHint CreateInsertion(SourceLocation InsertionLoc, StringRef Code, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code string at a specific location.
Definition: Diagnostic.h:78
SmallVector< TemplateParameterList *, 4 > TemplateParameterLists
Definition: Parse/Parser.h:262
DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, ModuleIdPath Path)
The parser has processed a module import declaration.
Definition: SemaDecl.cpp:14277
bool isUsable() const
Definition: Ownership.h:160
This is a scope that can contain a declaration. Some scopes just contain loop constructs but don't co...
Definition: Scope.h:57
bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, unsigned &DiagID, const PrintingPolicy &Policy)
Definition: DeclSpec.cpp:683
NamedDecl * HandleDeclarator(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParameterLists)
Definition: SemaDecl.cpp:4710
void ActOnTranslationUnitScope(Scope *S)
Definition: Sema.cpp:69
Decl * ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS)
Definition: SemaDecl.cpp:3540
bool isCXX11Attribute() const
Captures information about "declaration specifiers".
Definition: DeclSpec.h:233
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:1921
SourceLocation ConsumeToken()
Definition: Parse/Parser.h:284
bool isObjCObjectPointerType() const
Definition: Type.h:5304
Decl * ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, MultiTemplateParamsArg TemplateParameterLists, Declarator &D)
bool TryAnnotateTypeOrScopeToken(bool EnteringContext=false, bool NeedType=false)
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:307
void ActOnPopScope(SourceLocation Loc, Scope *S)
Scope actions.
Definition: SemaDecl.cpp:1589
static FixItHint CreateReplacement(CharSourceRange RemoveRange, StringRef Code)
Create a code modification hint that replaces the given source range with the given code string...
Definition: Diagnostic.h:115
ExprResult ExprError()
Definition: Ownership.h:267
void ActOnComment(SourceRange Comment)
Definition: Sema.cpp:1204
Abstract base class that describes a handler that will receive source ranges for each of the comments...
static OpaquePtr make(TemplateNameP)
Definition: Ownership.h:54
unsigned getParsedSpecifiers() const
Return a bitmask of which flavors of specifiers this DeclSpec includes.
Definition: DeclSpec.cpp:362
bool isSet() const
Definition: DeclSpec.h:214
virtual bool HandleTopLevelDecl(DeclGroupRef D)
Definition: ASTConsumer.cpp:20
void setLocation(SourceLocation L)
Definition: Token.h:132
void ActOnModuleEnd(SourceLocation DirectiveLoc, Module *Mod)
The parser has left a submodule.
Definition: SemaDecl.cpp:14355
AttributeList * getNext() const
#define true
Definition: stdbool.h:32
A trivial tuple used to represent a source range.
void setIdentifier(const IdentifierInfo *Id, SourceLocation IdLoc)
Specify that this unqualified-id was parsed as an identifier.
Definition: DeclSpec.h:973
unsigned NumArgs
NumArgs - The number of template arguments.
bool isAnnotation() const
Return true if this is any of tok::annot_* kind tokens.
Definition: Token.h:118
ParsedType getType() const
Definition: Sema.h:1534
The symbol does not exist.
Definition: Sema.h:3962
void CodeCompleteInPreprocessorConditionalExclusion(Scope *S)
ParsedAttributes & getAttributes()
Definition: DeclSpec.h:735
void startToken()
Reset all flags to cleared.
Definition: Token.h:169
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Definition: Preprocessor.h:96
bool isBacktrackEnabled() const
True if EnableBacktrackAtThisPos() was called and caching of tokens is on.
Stop skipping at specified token, but don't skip the token itself.
Definition: Parse/Parser.h:843
IdentifierInfo * getIdentifierInfo() const
Definition: Token.h:177
const AttributeList * getAttributes() const
Definition: DeclSpec.h:2125