clang  10.0.0svn
Parser.cpp
Go to the documentation of this file.
1 //===--- Parser.cpp - C Language Family Parser ----------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the Parser interfaces.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "clang/Parse/Parser.h"
14 #include "clang/AST/ASTConsumer.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/DeclTemplate.h"
19 #include "clang/Sema/DeclSpec.h"
21 #include "clang/Sema/Scope.h"
22 #include "llvm/Support/Path.h"
23 using namespace clang;
24 
25 
26 namespace {
27 /// A comment handler that passes comments found by the preprocessor
28 /// to the parser action.
29 class ActionCommentHandler : public CommentHandler {
30  Sema &S;
31 
32 public:
33  explicit ActionCommentHandler(Sema &S) : S(S) { }
34 
35  bool HandleComment(Preprocessor &PP, SourceRange Comment) override {
36  S.ActOnComment(Comment);
37  return false;
38  }
39 };
40 } // end anonymous namespace
41 
42 IdentifierInfo *Parser::getSEHExceptKeyword() {
43  // __except is accepted as a (contextual) keyword
44  if (!Ident__except && (getLangOpts().MicrosoftExt || getLangOpts().Borland))
45  Ident__except = PP.getIdentifierInfo("__except");
46 
47  return Ident__except;
48 }
49 
50 Parser::Parser(Preprocessor &pp, Sema &actions, bool skipFunctionBodies)
51  : PP(pp), Actions(actions), Diags(PP.getDiagnostics()),
52  GreaterThanIsOperator(true), ColonIsSacred(false),
53  InMessageExpression(false), TemplateParameterDepth(0),
54  ParsingInObjCContainer(false) {
55  SkipFunctionBodies = pp.isCodeCompletionEnabled() || skipFunctionBodies;
56  Tok.startToken();
57  Tok.setKind(tok::eof);
58  Actions.CurScope = nullptr;
59  NumCachedScopes = 0;
60  CurParsedObjCImpl = nullptr;
61 
62  // Add #pragma handlers. These are removed and destroyed in the
63  // destructor.
64  initializePragmaHandlers();
65 
66  CommentSemaHandler.reset(new ActionCommentHandler(actions));
67  PP.addCommentHandler(CommentSemaHandler.get());
68 
69  PP.setCodeCompletionHandler(*this);
70 }
71 
73  return Diags.Report(Loc, DiagID);
74 }
75 
76 DiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) {
77  return Diag(Tok.getLocation(), DiagID);
78 }
79 
80 /// Emits a diagnostic suggesting parentheses surrounding a
81 /// given range.
82 ///
83 /// \param Loc The location where we'll emit the diagnostic.
84 /// \param DK The kind of diagnostic to emit.
85 /// \param ParenRange Source range enclosing code that should be parenthesized.
86 void Parser::SuggestParentheses(SourceLocation Loc, unsigned DK,
87  SourceRange ParenRange) {
88  SourceLocation EndLoc = PP.getLocForEndOfToken(ParenRange.getEnd());
89  if (!ParenRange.getEnd().isFileID() || EndLoc.isInvalid()) {
90  // We can't display the parentheses, so just dig the
91  // warning/error and return.
92  Diag(Loc, DK);
93  return;
94  }
95 
96  Diag(Loc, DK)
97  << FixItHint::CreateInsertion(ParenRange.getBegin(), "(")
98  << FixItHint::CreateInsertion(EndLoc, ")");
99 }
100 
101 static bool IsCommonTypo(tok::TokenKind ExpectedTok, const Token &Tok) {
102  switch (ExpectedTok) {
103  case tok::semi:
104  return Tok.is(tok::colon) || Tok.is(tok::comma); // : or , for ;
105  default: return false;
106  }
107 }
108 
109 bool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID,
110  StringRef Msg) {
111  if (Tok.is(ExpectedTok) || Tok.is(tok::code_completion)) {
112  ConsumeAnyToken();
113  return false;
114  }
115 
116  // Detect common single-character typos and resume.
117  if (IsCommonTypo(ExpectedTok, Tok)) {
118  SourceLocation Loc = Tok.getLocation();
119  {
120  DiagnosticBuilder DB = Diag(Loc, DiagID);
122  SourceRange(Loc), tok::getPunctuatorSpelling(ExpectedTok));
123  if (DiagID == diag::err_expected)
124  DB << ExpectedTok;
125  else if (DiagID == diag::err_expected_after)
126  DB << Msg << ExpectedTok;
127  else
128  DB << Msg;
129  }
130 
131  // Pretend there wasn't a problem.
132  ConsumeAnyToken();
133  return false;
134  }
135 
136  SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation);
137  const char *Spelling = nullptr;
138  if (EndLoc.isValid())
139  Spelling = tok::getPunctuatorSpelling(ExpectedTok);
140 
141  DiagnosticBuilder DB =
142  Spelling
143  ? Diag(EndLoc, DiagID) << FixItHint::CreateInsertion(EndLoc, Spelling)
144  : Diag(Tok, DiagID);
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  return true;
153 }
154 
155 bool Parser::ExpectAndConsumeSemi(unsigned DiagID) {
156  if (TryConsumeToken(tok::semi))
157  return false;
158 
159  if (Tok.is(tok::code_completion)) {
160  handleUnexpectedCodeCompletionToken();
161  return false;
162  }
163 
164  if ((Tok.is(tok::r_paren) || Tok.is(tok::r_square)) &&
165  NextToken().is(tok::semi)) {
166  Diag(Tok, diag::err_extraneous_token_before_semi)
167  << PP.getSpelling(Tok)
169  ConsumeAnyToken(); // The ')' or ']'.
170  ConsumeToken(); // The ';'.
171  return false;
172  }
173 
174  return ExpectAndConsume(tok::semi, DiagID);
175 }
176 
177 void Parser::ConsumeExtraSemi(ExtraSemiKind Kind, DeclSpec::TST TST) {
178  if (!Tok.is(tok::semi)) return;
179 
180  bool HadMultipleSemis = false;
181  SourceLocation StartLoc = Tok.getLocation();
182  SourceLocation EndLoc = Tok.getLocation();
183  ConsumeToken();
184 
185  while ((Tok.is(tok::semi) && !Tok.isAtStartOfLine())) {
186  HadMultipleSemis = true;
187  EndLoc = Tok.getLocation();
188  ConsumeToken();
189  }
190 
191  // C++11 allows extra semicolons at namespace scope, but not in any of the
192  // other contexts.
193  if (Kind == OutsideFunction && getLangOpts().CPlusPlus) {
194  if (getLangOpts().CPlusPlus11)
195  Diag(StartLoc, diag::warn_cxx98_compat_top_level_semi)
196  << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
197  else
198  Diag(StartLoc, diag::ext_extra_semi_cxx11)
199  << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
200  return;
201  }
202 
203  if (Kind != AfterMemberFunctionDefinition || HadMultipleSemis)
204  Diag(StartLoc, diag::ext_extra_semi)
205  << Kind << DeclSpec::getSpecifierName(TST,
206  Actions.getASTContext().getPrintingPolicy())
207  << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
208  else
209  // A single semicolon is valid after a member function definition.
210  Diag(StartLoc, diag::warn_extra_semi_after_mem_fn_def)
211  << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
212 }
213 
214 bool Parser::expectIdentifier() {
215  if (Tok.is(tok::identifier))
216  return false;
217  if (const auto *II = Tok.getIdentifierInfo()) {
218  if (II->isCPlusPlusKeyword(getLangOpts())) {
219  Diag(Tok, diag::err_expected_token_instead_of_objcxx_keyword)
220  << tok::identifier << Tok.getIdentifierInfo();
221  // Objective-C++: Recover by treating this keyword as a valid identifier.
222  return false;
223  }
224  }
225  Diag(Tok, diag::err_expected) << tok::identifier;
226  return true;
227 }
228 
229 //===----------------------------------------------------------------------===//
230 // Error recovery.
231 //===----------------------------------------------------------------------===//
232 
234  return (static_cast<unsigned>(L) & static_cast<unsigned>(R)) != 0;
235 }
236 
237 /// SkipUntil - Read tokens until we get to the specified token, then consume
238 /// it (unless no flag StopBeforeMatch). Because we cannot guarantee that the
239 /// token will ever occur, this skips to the next token, or to some likely
240 /// good stopping point. If StopAtSemi is true, skipping will stop at a ';'
241 /// character.
242 ///
243 /// If SkipUntil finds the specified token, it returns true, otherwise it
244 /// returns false.
246  // We always want this function to skip at least one token if the first token
247  // isn't T and if not at EOF.
248  bool isFirstTokenSkipped = true;
249  while (1) {
250  // If we found one of the tokens, stop and return true.
251  for (unsigned i = 0, NumToks = Toks.size(); i != NumToks; ++i) {
252  if (Tok.is(Toks[i])) {
253  if (HasFlagsSet(Flags, StopBeforeMatch)) {
254  // Noop, don't consume the token.
255  } else {
256  ConsumeAnyToken();
257  }
258  return true;
259  }
260  }
261 
262  // Important special case: The caller has given up and just wants us to
263  // skip the rest of the file. Do this without recursing, since we can
264  // get here precisely because the caller detected too much recursion.
265  if (Toks.size() == 1 && Toks[0] == tok::eof &&
266  !HasFlagsSet(Flags, StopAtSemi) &&
268  while (Tok.isNot(tok::eof))
269  ConsumeAnyToken();
270  return true;
271  }
272 
273  switch (Tok.getKind()) {
274  case tok::eof:
275  // Ran out of tokens.
276  return false;
277 
278  case tok::annot_pragma_openmp:
279  case tok::annot_pragma_openmp_end:
280  // Stop before an OpenMP pragma boundary.
281  case tok::annot_module_begin:
282  case tok::annot_module_end:
283  case tok::annot_module_include:
284  // Stop before we change submodules. They generally indicate a "good"
285  // place to pick up parsing again (except in the special case where
286  // we're trying to skip to EOF).
287  return false;
288 
289  case tok::code_completion:
290  if (!HasFlagsSet(Flags, StopAtCodeCompletion))
291  handleUnexpectedCodeCompletionToken();
292  return false;
293 
294  case tok::l_paren:
295  // Recursively skip properly-nested parens.
296  ConsumeParen();
297  if (HasFlagsSet(Flags, StopAtCodeCompletion))
298  SkipUntil(tok::r_paren, StopAtCodeCompletion);
299  else
300  SkipUntil(tok::r_paren);
301  break;
302  case tok::l_square:
303  // Recursively skip properly-nested square brackets.
304  ConsumeBracket();
305  if (HasFlagsSet(Flags, StopAtCodeCompletion))
306  SkipUntil(tok::r_square, StopAtCodeCompletion);
307  else
308  SkipUntil(tok::r_square);
309  break;
310  case tok::l_brace:
311  // Recursively skip properly-nested braces.
312  ConsumeBrace();
313  if (HasFlagsSet(Flags, StopAtCodeCompletion))
314  SkipUntil(tok::r_brace, StopAtCodeCompletion);
315  else
316  SkipUntil(tok::r_brace);
317  break;
318  case tok::question:
319  // Recursively skip ? ... : pairs; these function as brackets. But
320  // still stop at a semicolon if requested.
321  ConsumeToken();
322  SkipUntil(tok::colon,
323  SkipUntilFlags(unsigned(Flags) &
324  unsigned(StopAtCodeCompletion | StopAtSemi)));
325  break;
326 
327  // Okay, we found a ']' or '}' or ')', which we think should be balanced.
328  // Since the user wasn't looking for this token (if they were, it would
329  // already be handled), this isn't balanced. If there is a LHS token at a
330  // higher level, we will assume that this matches the unbalanced token
331  // and return it. Otherwise, this is a spurious RHS token, which we skip.
332  case tok::r_paren:
333  if (ParenCount && !isFirstTokenSkipped)
334  return false; // Matches something.
335  ConsumeParen();
336  break;
337  case tok::r_square:
338  if (BracketCount && !isFirstTokenSkipped)
339  return false; // Matches something.
340  ConsumeBracket();
341  break;
342  case tok::r_brace:
343  if (BraceCount && !isFirstTokenSkipped)
344  return false; // Matches something.
345  ConsumeBrace();
346  break;
347 
348  case tok::semi:
349  if (HasFlagsSet(Flags, StopAtSemi))
350  return false;
351  LLVM_FALLTHROUGH;
352  default:
353  // Skip this token.
354  ConsumeAnyToken();
355  break;
356  }
357  isFirstTokenSkipped = false;
358  }
359 }
360 
361 //===----------------------------------------------------------------------===//
362 // Scope manipulation
363 //===----------------------------------------------------------------------===//
364 
365 /// EnterScope - Start a new scope.
366 void Parser::EnterScope(unsigned ScopeFlags) {
367  if (NumCachedScopes) {
368  Scope *N = ScopeCache[--NumCachedScopes];
369  N->Init(getCurScope(), ScopeFlags);
370  Actions.CurScope = N;
371  } else {
372  Actions.CurScope = new Scope(getCurScope(), ScopeFlags, Diags);
373  }
374 }
375 
376 /// ExitScope - Pop a scope off the scope stack.
378  assert(getCurScope() && "Scope imbalance!");
379 
380  // Inform the actions module that this scope is going away if there are any
381  // decls in it.
382  Actions.ActOnPopScope(Tok.getLocation(), getCurScope());
383 
384  Scope *OldScope = getCurScope();
385  Actions.CurScope = OldScope->getParent();
386 
387  if (NumCachedScopes == ScopeCacheSize)
388  delete OldScope;
389  else
390  ScopeCache[NumCachedScopes++] = OldScope;
391 }
392 
393 /// Set the flags for the current scope to ScopeFlags. If ManageFlags is false,
394 /// this object does nothing.
395 Parser::ParseScopeFlags::ParseScopeFlags(Parser *Self, unsigned ScopeFlags,
396  bool ManageFlags)
397  : CurScope(ManageFlags ? Self->getCurScope() : nullptr) {
398  if (CurScope) {
399  OldFlags = CurScope->getFlags();
400  CurScope->setFlags(ScopeFlags);
401  }
402 }
403 
404 /// Restore the flags for the current scope to what they were before this
405 /// object overrode them.
406 Parser::ParseScopeFlags::~ParseScopeFlags() {
407  if (CurScope)
408  CurScope->setFlags(OldFlags);
409 }
410 
411 
412 //===----------------------------------------------------------------------===//
413 // C99 6.9: External Definitions.
414 //===----------------------------------------------------------------------===//
415 
417  // If we still have scopes active, delete the scope tree.
418  delete getCurScope();
419  Actions.CurScope = nullptr;
420 
421  // Free the scope cache.
422  for (unsigned i = 0, e = NumCachedScopes; i != e; ++i)
423  delete ScopeCache[i];
424 
425  resetPragmaHandlers();
426 
427  PP.removeCommentHandler(CommentSemaHandler.get());
428 
430 
431  if (getLangOpts().DelayedTemplateParsing &&
432  !PP.isIncrementalProcessingEnabled() && !TemplateIds.empty()) {
433  // If an ASTConsumer parsed delay-parsed templates in their
434  // HandleTranslationUnit() method, TemplateIds created there were not
435  // guarded by a DestroyTemplateIdAnnotationsRAIIObj object in
436  // ParseTopLevelDecl(). Destroy them here.
437  DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
438  }
439 
440  assert(TemplateIds.empty() && "Still alive TemplateIdAnnotations around?");
441 }
442 
443 /// Initialize - Warm up the parser.
444 ///
446  // Create the translation unit scope. Install it as the current scope.
447  assert(getCurScope() == nullptr && "A scope is already active?");
450 
451  // Initialization for Objective-C context sensitive keywords recognition.
452  // Referenced in Parser::ParseObjCTypeQualifierList.
453  if (getLangOpts().ObjC) {
454  ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in");
455  ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out");
456  ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout");
457  ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway");
458  ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy");
459  ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref");
460  ObjCTypeQuals[objc_nonnull] = &PP.getIdentifierTable().get("nonnull");
461  ObjCTypeQuals[objc_nullable] = &PP.getIdentifierTable().get("nullable");
462  ObjCTypeQuals[objc_null_unspecified]
463  = &PP.getIdentifierTable().get("null_unspecified");
464  }
465 
466  Ident_instancetype = nullptr;
467  Ident_final = nullptr;
468  Ident_sealed = nullptr;
469  Ident_override = nullptr;
470  Ident_GNU_final = nullptr;
471  Ident_import = nullptr;
472  Ident_module = nullptr;
473 
474  Ident_super = &PP.getIdentifierTable().get("super");
475 
476  Ident_vector = nullptr;
477  Ident_bool = nullptr;
478  Ident_pixel = nullptr;
479  if (getLangOpts().AltiVec || getLangOpts().ZVector) {
480  Ident_vector = &PP.getIdentifierTable().get("vector");
481  Ident_bool = &PP.getIdentifierTable().get("bool");
482  }
483  if (getLangOpts().AltiVec)
484  Ident_pixel = &PP.getIdentifierTable().get("pixel");
485 
486  Ident_introduced = nullptr;
487  Ident_deprecated = nullptr;
488  Ident_obsoleted = nullptr;
489  Ident_unavailable = nullptr;
490  Ident_strict = nullptr;
491  Ident_replacement = nullptr;
492 
493  Ident_language = Ident_defined_in = Ident_generated_declaration = nullptr;
494 
495  Ident__except = nullptr;
496 
497  Ident__exception_code = Ident__exception_info = nullptr;
498  Ident__abnormal_termination = Ident___exception_code = nullptr;
499  Ident___exception_info = Ident___abnormal_termination = nullptr;
500  Ident_GetExceptionCode = Ident_GetExceptionInfo = nullptr;
501  Ident_AbnormalTermination = nullptr;
502 
503  if(getLangOpts().Borland) {
504  Ident__exception_info = PP.getIdentifierInfo("_exception_info");
505  Ident___exception_info = PP.getIdentifierInfo("__exception_info");
506  Ident_GetExceptionInfo = PP.getIdentifierInfo("GetExceptionInformation");
507  Ident__exception_code = PP.getIdentifierInfo("_exception_code");
508  Ident___exception_code = PP.getIdentifierInfo("__exception_code");
509  Ident_GetExceptionCode = PP.getIdentifierInfo("GetExceptionCode");
510  Ident__abnormal_termination = PP.getIdentifierInfo("_abnormal_termination");
511  Ident___abnormal_termination = PP.getIdentifierInfo("__abnormal_termination");
512  Ident_AbnormalTermination = PP.getIdentifierInfo("AbnormalTermination");
513 
514  PP.SetPoisonReason(Ident__exception_code,diag::err_seh___except_block);
515  PP.SetPoisonReason(Ident___exception_code,diag::err_seh___except_block);
516  PP.SetPoisonReason(Ident_GetExceptionCode,diag::err_seh___except_block);
517  PP.SetPoisonReason(Ident__exception_info,diag::err_seh___except_filter);
518  PP.SetPoisonReason(Ident___exception_info,diag::err_seh___except_filter);
519  PP.SetPoisonReason(Ident_GetExceptionInfo,diag::err_seh___except_filter);
520  PP.SetPoisonReason(Ident__abnormal_termination,diag::err_seh___finally_block);
521  PP.SetPoisonReason(Ident___abnormal_termination,diag::err_seh___finally_block);
522  PP.SetPoisonReason(Ident_AbnormalTermination,diag::err_seh___finally_block);
523  }
524 
525  if (getLangOpts().CPlusPlusModules) {
526  Ident_import = PP.getIdentifierInfo("import");
527  Ident_module = PP.getIdentifierInfo("module");
528  }
529 
530  Actions.Initialize();
531 
532  // Prime the lexer look-ahead.
533  ConsumeToken();
534 }
535 
536 void Parser::LateTemplateParserCleanupCallback(void *P) {
537  // While this RAII helper doesn't bracket any actual work, the destructor will
538  // clean up annotations that were created during ActOnEndOfTranslationUnit
539  // when incremental processing is enabled.
540  DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(((Parser *)P)->TemplateIds);
541 }
542 
543 /// Parse the first top-level declaration in a translation unit.
544 ///
545 /// translation-unit:
546 /// [C] external-declaration
547 /// [C] translation-unit external-declaration
548 /// [C++] top-level-declaration-seq[opt]
549 /// [C++20] global-module-fragment[opt] module-declaration
550 /// top-level-declaration-seq[opt] private-module-fragment[opt]
551 ///
552 /// Note that in C, it is an error if there is no first declaration.
554  Actions.ActOnStartOfTranslationUnit();
555 
556  // C11 6.9p1 says translation units must have at least one top-level
557  // declaration. C++ doesn't have this restriction. We also don't want to
558  // complain if we have a precompiled header, although technically if the PCH
559  // is empty we should still emit the (pedantic) diagnostic.
560  bool NoTopLevelDecls = ParseTopLevelDecl(Result, true);
561  if (NoTopLevelDecls && !Actions.getASTContext().getExternalSource() &&
562  !getLangOpts().CPlusPlus)
563  Diag(diag::ext_empty_translation_unit);
564 
565  return NoTopLevelDecls;
566 }
567 
568 /// ParseTopLevelDecl - Parse one top-level declaration, return whatever the
569 /// action tells us to. This returns true if the EOF was encountered.
570 ///
571 /// top-level-declaration:
572 /// declaration
573 /// [C++20] module-import-declaration
575  DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
576 
577  // Skip over the EOF token, flagging end of previous input for incremental
578  // processing
579  if (PP.isIncrementalProcessingEnabled() && Tok.is(tok::eof))
580  ConsumeToken();
581 
582  Result = nullptr;
583  switch (Tok.getKind()) {
584  case tok::annot_pragma_unused:
585  HandlePragmaUnused();
586  return false;
587 
588  case tok::kw_export:
589  switch (NextToken().getKind()) {
590  case tok::kw_module:
591  goto module_decl;
592 
593  // Note: no need to handle kw_import here. We only form kw_import under
594  // the Modules TS, and in that case 'export import' is parsed as an
595  // export-declaration containing an import-declaration.
596 
597  // Recognize context-sensitive C++20 'export module' and 'export import'
598  // declarations.
599  case tok::identifier: {
601  if ((II == Ident_module || II == Ident_import) &&
602  GetLookAheadToken(2).isNot(tok::coloncolon)) {
603  if (II == Ident_module)
604  goto module_decl;
605  else
606  goto import_decl;
607  }
608  break;
609  }
610 
611  default:
612  break;
613  }
614  break;
615 
616  case tok::kw_module:
617  module_decl:
618  Result = ParseModuleDecl(IsFirstDecl);
619  return false;
620 
621  // tok::kw_import is handled by ParseExternalDeclaration. (Under the Modules
622  // TS, an import can occur within an export block.)
623  import_decl: {
624  Decl *ImportDecl = ParseModuleImport(SourceLocation());
625  Result = Actions.ConvertDeclToDeclGroup(ImportDecl);
626  return false;
627  }
628 
629  case tok::annot_module_include:
630  Actions.ActOnModuleInclude(Tok.getLocation(),
631  reinterpret_cast<Module *>(
632  Tok.getAnnotationValue()));
633  ConsumeAnnotationToken();
634  return false;
635 
636  case tok::annot_module_begin:
637  Actions.ActOnModuleBegin(Tok.getLocation(), reinterpret_cast<Module *>(
638  Tok.getAnnotationValue()));
639  ConsumeAnnotationToken();
640  return false;
641 
642  case tok::annot_module_end:
643  Actions.ActOnModuleEnd(Tok.getLocation(), reinterpret_cast<Module *>(
644  Tok.getAnnotationValue()));
645  ConsumeAnnotationToken();
646  return false;
647 
648  case tok::eof:
649  // Late template parsing can begin.
650  if (getLangOpts().DelayedTemplateParsing)
651  Actions.SetLateTemplateParser(LateTemplateParserCallback,
653  LateTemplateParserCleanupCallback : nullptr,
654  this);
656  Actions.ActOnEndOfTranslationUnit();
657  //else don't tell Sema that we ended parsing: more input might come.
658  return true;
659 
660  case tok::identifier:
661  // C++2a [basic.link]p3:
662  // A token sequence beginning with 'export[opt] module' or
663  // 'export[opt] import' and not immediately followed by '::'
664  // is never interpreted as the declaration of a top-level-declaration.
665  if ((Tok.getIdentifierInfo() == Ident_module ||
666  Tok.getIdentifierInfo() == Ident_import) &&
667  NextToken().isNot(tok::coloncolon)) {
668  if (Tok.getIdentifierInfo() == Ident_module)
669  goto module_decl;
670  else
671  goto import_decl;
672  }
673  break;
674 
675  default:
676  break;
677  }
678 
679  ParsedAttributesWithRange attrs(AttrFactory);
680  MaybeParseCXX11Attributes(attrs);
681 
682  Result = ParseExternalDeclaration(attrs);
683  return false;
684 }
685 
686 /// ParseExternalDeclaration:
687 ///
688 /// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl]
689 /// function-definition
690 /// declaration
691 /// [GNU] asm-definition
692 /// [GNU] __extension__ external-declaration
693 /// [OBJC] objc-class-definition
694 /// [OBJC] objc-class-declaration
695 /// [OBJC] objc-alias-declaration
696 /// [OBJC] objc-protocol-definition
697 /// [OBJC] objc-method-definition
698 /// [OBJC] @end
699 /// [C++] linkage-specification
700 /// [GNU] asm-definition:
701 /// simple-asm-expr ';'
702 /// [C++11] empty-declaration
703 /// [C++11] attribute-declaration
704 ///
705 /// [C++11] empty-declaration:
706 /// ';'
707 ///
708 /// [C++0x/GNU] 'extern' 'template' declaration
709 ///
710 /// [Modules-TS] module-import-declaration
711 ///
713 Parser::ParseExternalDeclaration(ParsedAttributesWithRange &attrs,
714  ParsingDeclSpec *DS) {
715  DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
716  ParenBraceBracketBalancer BalancerRAIIObj(*this);
717 
718  if (PP.isCodeCompletionReached()) {
719  cutOffParsing();
720  return nullptr;
721  }
722 
723  Decl *SingleDecl = nullptr;
724  switch (Tok.getKind()) {
725  case tok::annot_pragma_vis:
726  HandlePragmaVisibility();
727  return nullptr;
728  case tok::annot_pragma_pack:
729  HandlePragmaPack();
730  return nullptr;
731  case tok::annot_pragma_msstruct:
732  HandlePragmaMSStruct();
733  return nullptr;
734  case tok::annot_pragma_align:
735  HandlePragmaAlign();
736  return nullptr;
737  case tok::annot_pragma_weak:
738  HandlePragmaWeak();
739  return nullptr;
740  case tok::annot_pragma_weakalias:
741  HandlePragmaWeakAlias();
742  return nullptr;
743  case tok::annot_pragma_redefine_extname:
744  HandlePragmaRedefineExtname();
745  return nullptr;
746  case tok::annot_pragma_fp_contract:
747  HandlePragmaFPContract();
748  return nullptr;
749  case tok::annot_pragma_fenv_access:
750  HandlePragmaFEnvAccess();
751  return nullptr;
752  case tok::annot_pragma_fp:
753  HandlePragmaFP();
754  break;
755  case tok::annot_pragma_opencl_extension:
756  HandlePragmaOpenCLExtension();
757  return nullptr;
758  case tok::annot_pragma_openmp: {
760  return ParseOpenMPDeclarativeDirectiveWithExtDecl(AS, attrs);
761  }
762  case tok::annot_pragma_ms_pointers_to_members:
763  HandlePragmaMSPointersToMembers();
764  return nullptr;
765  case tok::annot_pragma_ms_vtordisp:
766  HandlePragmaMSVtorDisp();
767  return nullptr;
768  case tok::annot_pragma_ms_pragma:
769  HandlePragmaMSPragma();
770  return nullptr;
771  case tok::annot_pragma_dump:
772  HandlePragmaDump();
773  return nullptr;
774  case tok::annot_pragma_attribute:
775  HandlePragmaAttribute();
776  return nullptr;
777  case tok::semi:
778  // Either a C++11 empty-declaration or attribute-declaration.
779  SingleDecl =
780  Actions.ActOnEmptyDeclaration(getCurScope(), attrs, Tok.getLocation());
781  ConsumeExtraSemi(OutsideFunction);
782  break;
783  case tok::r_brace:
784  Diag(Tok, diag::err_extraneous_closing_brace);
785  ConsumeBrace();
786  return nullptr;
787  case tok::eof:
788  Diag(Tok, diag::err_expected_external_declaration);
789  return nullptr;
790  case tok::kw___extension__: {
791  // __extension__ silences extension warnings in the subexpression.
792  ExtensionRAIIObject O(Diags); // Use RAII to do this.
793  ConsumeToken();
794  return ParseExternalDeclaration(attrs);
795  }
796  case tok::kw_asm: {
797  ProhibitAttributes(attrs);
798 
799  SourceLocation StartLoc = Tok.getLocation();
800  SourceLocation EndLoc;
801 
802  ExprResult Result(ParseSimpleAsm(&EndLoc));
803 
804  // Check if GNU-style InlineAsm is disabled.
805  // Empty asm string is allowed because it will not introduce
806  // any assembly code.
807  if (!(getLangOpts().GNUAsm || Result.isInvalid())) {
808  const auto *SL = cast<StringLiteral>(Result.get());
809  if (!SL->getString().trim().empty())
810  Diag(StartLoc, diag::err_gnu_inline_asm_disabled);
811  }
812 
813  ExpectAndConsume(tok::semi, diag::err_expected_after,
814  "top-level asm block");
815 
816  if (Result.isInvalid())
817  return nullptr;
818  SingleDecl = Actions.ActOnFileScopeAsmDecl(Result.get(), StartLoc, EndLoc);
819  break;
820  }
821  case tok::at:
822  return ParseObjCAtDirectives(attrs);
823  case tok::minus:
824  case tok::plus:
825  if (!getLangOpts().ObjC) {
826  Diag(Tok, diag::err_expected_external_declaration);
827  ConsumeToken();
828  return nullptr;
829  }
830  SingleDecl = ParseObjCMethodDefinition();
831  break;
832  case tok::code_completion:
833  if (CurParsedObjCImpl) {
834  // Code-complete Objective-C methods even without leading '-'/'+' prefix.
836  /*IsInstanceMethod=*/None,
837  /*ReturnType=*/nullptr);
838  }
839  Actions.CodeCompleteOrdinaryName(
840  getCurScope(),
841  CurParsedObjCImpl ? Sema::PCC_ObjCImplementation : Sema::PCC_Namespace);
842  cutOffParsing();
843  return nullptr;
844  case tok::kw_import:
845  SingleDecl = ParseModuleImport(SourceLocation());
846  break;
847  case tok::kw_export:
848  if (getLangOpts().CPlusPlusModules || getLangOpts().ModulesTS) {
849  SingleDecl = ParseExportDeclaration();
850  break;
851  }
852  // This must be 'export template'. Parse it so we can diagnose our lack
853  // of support.
854  LLVM_FALLTHROUGH;
855  case tok::kw_using:
856  case tok::kw_namespace:
857  case tok::kw_typedef:
858  case tok::kw_template:
859  case tok::kw_static_assert:
860  case tok::kw__Static_assert:
861  // A function definition cannot start with any of these keywords.
862  {
863  SourceLocation DeclEnd;
864  return ParseDeclaration(DeclaratorContext::FileContext, DeclEnd, attrs);
865  }
866 
867  case tok::kw_static:
868  // Parse (then ignore) 'static' prior to a template instantiation. This is
869  // a GCC extension that we intentionally do not support.
870  if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
871  Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
872  << 0;
873  SourceLocation DeclEnd;
874  return ParseDeclaration(DeclaratorContext::FileContext, DeclEnd, attrs);
875  }
876  goto dont_know;
877 
878  case tok::kw_inline:
879  if (getLangOpts().CPlusPlus) {
880  tok::TokenKind NextKind = NextToken().getKind();
881 
882  // Inline namespaces. Allowed as an extension even in C++03.
883  if (NextKind == tok::kw_namespace) {
884  SourceLocation DeclEnd;
885  return ParseDeclaration(DeclaratorContext::FileContext, DeclEnd, attrs);
886  }
887 
888  // Parse (then ignore) 'inline' prior to a template instantiation. This is
889  // a GCC extension that we intentionally do not support.
890  if (NextKind == tok::kw_template) {
891  Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
892  << 1;
893  SourceLocation DeclEnd;
894  return ParseDeclaration(DeclaratorContext::FileContext, DeclEnd, attrs);
895  }
896  }
897  goto dont_know;
898 
899  case tok::kw_extern:
900  if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
901  // Extern templates
902  SourceLocation ExternLoc = ConsumeToken();
903  SourceLocation TemplateLoc = ConsumeToken();
904  Diag(ExternLoc, getLangOpts().CPlusPlus11 ?
905  diag::warn_cxx98_compat_extern_template :
906  diag::ext_extern_template) << SourceRange(ExternLoc, TemplateLoc);
907  SourceLocation DeclEnd;
908  return Actions.ConvertDeclToDeclGroup(
909  ParseExplicitInstantiation(DeclaratorContext::FileContext, ExternLoc,
910  TemplateLoc, DeclEnd, attrs));
911  }
912  goto dont_know;
913 
914  case tok::kw___if_exists:
915  case tok::kw___if_not_exists:
916  ParseMicrosoftIfExistsExternalDeclaration();
917  return nullptr;
918 
919  case tok::kw_module:
920  Diag(Tok, diag::err_unexpected_module_decl);
921  SkipUntil(tok::semi);
922  return nullptr;
923 
924  default:
925  dont_know:
926  if (Tok.isEditorPlaceholder()) {
927  ConsumeToken();
928  return nullptr;
929  }
930  // We can't tell whether this is a function-definition or declaration yet.
931  return ParseDeclarationOrFunctionDefinition(attrs, DS);
932  }
933 
934  // This routine returns a DeclGroup, if the thing we parsed only contains a
935  // single decl, convert it now.
936  return Actions.ConvertDeclToDeclGroup(SingleDecl);
937 }
938 
939 /// Determine whether the current token, if it occurs after a
940 /// declarator, continues a declaration or declaration list.
941 bool Parser::isDeclarationAfterDeclarator() {
942  // Check for '= delete' or '= default'
943  if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
944  const Token &KW = NextToken();
945  if (KW.is(tok::kw_default) || KW.is(tok::kw_delete))
946  return false;
947  }
948 
949  return Tok.is(tok::equal) || // int X()= -> not a function def
950  Tok.is(tok::comma) || // int X(), -> not a function def
951  Tok.is(tok::semi) || // int X(); -> not a function def
952  Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def
953  Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def
954  (getLangOpts().CPlusPlus &&
955  Tok.is(tok::l_paren)); // int X(0) -> not a function def [C++]
956 }
957 
958 /// Determine whether the current token, if it occurs after a
959 /// declarator, indicates the start of a function definition.
960 bool Parser::isStartOfFunctionDefinition(const ParsingDeclarator &Declarator) {
961  assert(Declarator.isFunctionDeclarator() && "Isn't a function declarator");
962  if (Tok.is(tok::l_brace)) // int X() {}
963  return true;
964 
965  // Handle K&R C argument lists: int X(f) int f; {}
966  if (!getLangOpts().CPlusPlus &&
967  Declarator.getFunctionTypeInfo().isKNRPrototype())
968  return isDeclarationSpecifier();
969 
970  if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
971  const Token &KW = NextToken();
972  return KW.is(tok::kw_default) || KW.is(tok::kw_delete);
973  }
974 
975  return Tok.is(tok::colon) || // X() : Base() {} (used for ctors)
976  Tok.is(tok::kw_try); // X() try { ... }
977 }
978 
979 /// Parse either a function-definition or a declaration. We can't tell which
980 /// we have until we read up to the compound-statement in function-definition.
981 /// TemplateParams, if non-NULL, provides the template parameters when we're
982 /// parsing a C++ template-declaration.
983 ///
984 /// function-definition: [C99 6.9.1]
985 /// decl-specs declarator declaration-list[opt] compound-statement
986 /// [C90] function-definition: [C99 6.7.1] - implicit int result
987 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
988 ///
989 /// declaration: [C99 6.7]
990 /// declaration-specifiers init-declarator-list[opt] ';'
991 /// [!C99] init-declarator-list ';' [TODO: warn in c99 mode]
992 /// [OMP] threadprivate-directive
993 /// [OMP] allocate-directive [TODO]
994 ///
996 Parser::ParseDeclOrFunctionDefInternal(ParsedAttributesWithRange &attrs,
997  ParsingDeclSpec &DS,
998  AccessSpecifier AS) {
999  MaybeParseMicrosoftAttributes(DS.getAttributes());
1000  // Parse the common declaration-specifiers piece.
1001  ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS,
1002  DeclSpecContext::DSC_top_level);
1003 
1004  // If we had a free-standing type definition with a missing semicolon, we
1005  // may get this far before the problem becomes obvious.
1006  if (DS.hasTagDefinition() && DiagnoseMissingSemiAfterTagDefinition(
1007  DS, AS, DeclSpecContext::DSC_top_level))
1008  return nullptr;
1009 
1010  // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
1011  // declaration-specifiers init-declarator-list[opt] ';'
1012  if (Tok.is(tok::semi)) {
1013  auto LengthOfTSTToken = [](DeclSpec::TST TKind) {
1014  assert(DeclSpec::isDeclRep(TKind));
1015  switch(TKind) {
1016  case DeclSpec::TST_class:
1017  return 5;
1018  case DeclSpec::TST_struct:
1019  return 6;
1020  case DeclSpec::TST_union:
1021  return 5;
1022  case DeclSpec::TST_enum:
1023  return 4;
1025  return 9;
1026  default:
1027  llvm_unreachable("we only expect to get the length of the class/struct/union/enum");
1028  }
1029 
1030  };
1031  // Suggest correct location to fix '[[attrib]] struct' to 'struct [[attrib]]'
1032  SourceLocation CorrectLocationForAttributes =
1035  LengthOfTSTToken(DS.getTypeSpecType()))
1036  : SourceLocation();
1037  ProhibitAttributes(attrs, CorrectLocationForAttributes);
1038  ConsumeToken();
1039  RecordDecl *AnonRecord = nullptr;
1040  Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none,
1041  DS, AnonRecord);
1042  DS.complete(TheDecl);
1043  if (getLangOpts().OpenCL)
1044  Actions.setCurrentOpenCLExtensionForDecl(TheDecl);
1045  if (AnonRecord) {
1046  Decl* decls[] = {AnonRecord, TheDecl};
1047  return Actions.BuildDeclaratorGroup(decls);
1048  }
1049  return Actions.ConvertDeclToDeclGroup(TheDecl);
1050  }
1051 
1052  DS.takeAttributesFrom(attrs);
1053 
1054  // ObjC2 allows prefix attributes on class interfaces and protocols.
1055  // FIXME: This still needs better diagnostics. We should only accept
1056  // attributes here, no types, etc.
1057  if (getLangOpts().ObjC && Tok.is(tok::at)) {
1058  SourceLocation AtLoc = ConsumeToken(); // the "@"
1059  if (!Tok.isObjCAtKeyword(tok::objc_interface) &&
1060  !Tok.isObjCAtKeyword(tok::objc_protocol) &&
1061  !Tok.isObjCAtKeyword(tok::objc_implementation)) {
1062  Diag(Tok, diag::err_objc_unexpected_attr);
1063  SkipUntil(tok::semi);
1064  return nullptr;
1065  }
1066 
1067  DS.abort();
1068 
1069  const char *PrevSpec = nullptr;
1070  unsigned DiagID;
1071  if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec, DiagID,
1072  Actions.getASTContext().getPrintingPolicy()))
1073  Diag(AtLoc, DiagID) << PrevSpec;
1074 
1075  if (Tok.isObjCAtKeyword(tok::objc_protocol))
1076  return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes());
1077 
1078  if (Tok.isObjCAtKeyword(tok::objc_implementation))
1079  return ParseObjCAtImplementationDeclaration(AtLoc, DS.getAttributes());
1080 
1081  return Actions.ConvertDeclToDeclGroup(
1082  ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()));
1083  }
1084 
1085  // If the declspec consisted only of 'extern' and we have a string
1086  // literal following it, this must be a C++ linkage specifier like
1087  // 'extern "C"'.
1088  if (getLangOpts().CPlusPlus && isTokenStringLiteral() &&
1091  Decl *TheDecl = ParseLinkage(DS, DeclaratorContext::FileContext);
1092  return Actions.ConvertDeclToDeclGroup(TheDecl);
1093  }
1094 
1095  return ParseDeclGroup(DS, DeclaratorContext::FileContext);
1096 }
1097 
1099 Parser::ParseDeclarationOrFunctionDefinition(ParsedAttributesWithRange &attrs,
1100  ParsingDeclSpec *DS,
1101  AccessSpecifier AS) {
1102  if (DS) {
1103  return ParseDeclOrFunctionDefInternal(attrs, *DS, AS);
1104  } else {
1105  ParsingDeclSpec PDS(*this);
1106  // Must temporarily exit the objective-c container scope for
1107  // parsing c constructs and re-enter objc container scope
1108  // afterwards.
1109  ObjCDeclContextSwitch ObjCDC(*this);
1110 
1111  return ParseDeclOrFunctionDefInternal(attrs, PDS, AS);
1112  }
1113 }
1114 
1115 /// ParseFunctionDefinition - We parsed and verified that the specified
1116 /// Declarator is well formed. If this is a K&R-style function, read the
1117 /// parameters declaration-list, then start the compound-statement.
1118 ///
1119 /// function-definition: [C99 6.9.1]
1120 /// decl-specs declarator declaration-list[opt] compound-statement
1121 /// [C90] function-definition: [C99 6.7.1] - implicit int result
1122 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
1123 /// [C++] function-definition: [C++ 8.4]
1124 /// decl-specifier-seq[opt] declarator ctor-initializer[opt]
1125 /// function-body
1126 /// [C++] function-definition: [C++ 8.4]
1127 /// decl-specifier-seq[opt] declarator function-try-block
1128 ///
1129 Decl *Parser::ParseFunctionDefinition(ParsingDeclarator &D,
1130  const ParsedTemplateInfo &TemplateInfo,
1131  LateParsedAttrList *LateParsedAttrs) {
1132  // Poison SEH identifiers so they are flagged as illegal in function bodies.
1133  PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true);
1135 
1136  // If this is C90 and the declspecs were completely missing, fudge in an
1137  // implicit int. We do this here because this is the only place where
1138  // declaration-specifiers are completely optional in the grammar.
1139  if (getLangOpts().ImplicitInt && D.getDeclSpec().isEmpty()) {
1140  const char *PrevSpec;
1141  unsigned DiagID;
1142  const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
1144  D.getIdentifierLoc(),
1145  PrevSpec, DiagID,
1146  Policy);
1148  }
1149 
1150  // If this declaration was formed with a K&R-style identifier list for the
1151  // arguments, parse declarations for all of the args next.
1152  // int foo(a,b) int a; float b; {}
1153  if (FTI.isKNRPrototype())
1154  ParseKNRParamDeclarations(D);
1155 
1156  // We should have either an opening brace or, in a C++ constructor,
1157  // we may have a colon.
1158  if (Tok.isNot(tok::l_brace) &&
1159  (!getLangOpts().CPlusPlus ||
1160  (Tok.isNot(tok::colon) && Tok.isNot(tok::kw_try) &&
1161  Tok.isNot(tok::equal)))) {
1162  Diag(Tok, diag::err_expected_fn_body);
1163 
1164  // Skip over garbage, until we get to '{'. Don't eat the '{'.
1165  SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
1166 
1167  // If we didn't find the '{', bail out.
1168  if (Tok.isNot(tok::l_brace))
1169  return nullptr;
1170  }
1171 
1172  // Check to make sure that any normal attributes are allowed to be on
1173  // a definition. Late parsed attributes are checked at the end.
1174  if (Tok.isNot(tok::equal)) {
1175  for (const ParsedAttr &AL : D.getAttributes())
1176  if (AL.isKnownToGCC() && !AL.isCXX11Attribute())
1177  Diag(AL.getLoc(), diag::warn_attribute_on_function_definition) << AL;
1178  }
1179 
1180  // In delayed template parsing mode, for function template we consume the
1181  // tokens and store them for late parsing at the end of the translation unit.
1182  if (getLangOpts().DelayedTemplateParsing && Tok.isNot(tok::equal) &&
1183  TemplateInfo.Kind == ParsedTemplateInfo::Template &&
1184  Actions.canDelayFunctionBody(D)) {
1185  MultiTemplateParamsArg TemplateParameterLists(*TemplateInfo.TemplateParams);
1186 
1187  ParseScope BodyScope(this, Scope::FnScope | Scope::DeclScope |
1189  Scope *ParentScope = getCurScope()->getParent();
1190 
1192  Decl *DP = Actions.HandleDeclarator(ParentScope, D,
1193  TemplateParameterLists);
1194  D.complete(DP);
1195  D.getMutableDeclSpec().abort();
1196 
1197  if (SkipFunctionBodies && (!DP || Actions.canSkipFunctionBody(DP)) &&
1198  trySkippingFunctionBody()) {
1199  BodyScope.Exit();
1200  return Actions.ActOnSkippedFunctionBody(DP);
1201  }
1202 
1203  CachedTokens Toks;
1204  LexTemplateFunctionForLateParsing(Toks);
1205 
1206  if (DP) {
1207  FunctionDecl *FnD = DP->getAsFunction();
1208  Actions.CheckForFunctionRedefinition(FnD);
1209  Actions.MarkAsLateParsedTemplate(FnD, DP, Toks);
1210  }
1211  return DP;
1212  }
1213  else if (CurParsedObjCImpl &&
1214  !TemplateInfo.TemplateParams &&
1215  (Tok.is(tok::l_brace) || Tok.is(tok::kw_try) ||
1216  Tok.is(tok::colon)) &&
1217  Actions.CurContext->isTranslationUnit()) {
1218  ParseScope BodyScope(this, Scope::FnScope | Scope::DeclScope |
1220  Scope *ParentScope = getCurScope()->getParent();
1221 
1223  Decl *FuncDecl = Actions.HandleDeclarator(ParentScope, D,
1225  D.complete(FuncDecl);
1226  D.getMutableDeclSpec().abort();
1227  if (FuncDecl) {
1228  // Consume the tokens and store them for later parsing.
1229  StashAwayMethodOrFunctionBodyTokens(FuncDecl);
1230  CurParsedObjCImpl->HasCFunction = true;
1231  return FuncDecl;
1232  }
1233  // FIXME: Should we really fall through here?
1234  }
1235 
1236  // Enter a scope for the function body.
1237  ParseScope BodyScope(this, Scope::FnScope | Scope::DeclScope |
1239 
1240  // Tell the actions module that we have entered a function definition with the
1241  // specified Declarator for the function.
1242  Sema::SkipBodyInfo SkipBody;
1243  Decl *Res = Actions.ActOnStartOfFunctionDef(getCurScope(), D,
1244  TemplateInfo.TemplateParams
1245  ? *TemplateInfo.TemplateParams
1247  &SkipBody);
1248 
1249  if (SkipBody.ShouldSkip) {
1250  SkipFunctionBody();
1251  return Res;
1252  }
1253 
1254  // Break out of the ParsingDeclarator context before we parse the body.
1255  D.complete(Res);
1256 
1257  // Break out of the ParsingDeclSpec context, too. This const_cast is
1258  // safe because we're always the sole owner.
1259  D.getMutableDeclSpec().abort();
1260 
1261  if (TryConsumeToken(tok::equal)) {
1262  assert(getLangOpts().CPlusPlus && "Only C++ function definitions have '='");
1263 
1264  bool Delete = false;
1265  SourceLocation KWLoc;
1266  if (TryConsumeToken(tok::kw_delete, KWLoc)) {
1267  Diag(KWLoc, getLangOpts().CPlusPlus11
1268  ? diag::warn_cxx98_compat_defaulted_deleted_function
1269  : diag::ext_defaulted_deleted_function)
1270  << 1 /* deleted */;
1271  Actions.SetDeclDeleted(Res, KWLoc);
1272  Delete = true;
1273  } else if (TryConsumeToken(tok::kw_default, KWLoc)) {
1274  Diag(KWLoc, getLangOpts().CPlusPlus11
1275  ? diag::warn_cxx98_compat_defaulted_deleted_function
1276  : diag::ext_defaulted_deleted_function)
1277  << 0 /* defaulted */;
1278  Actions.SetDeclDefaulted(Res, KWLoc);
1279  } else {
1280  llvm_unreachable("function definition after = not 'delete' or 'default'");
1281  }
1282 
1283  if (Tok.is(tok::comma)) {
1284  Diag(KWLoc, diag::err_default_delete_in_multiple_declaration)
1285  << Delete;
1286  SkipUntil(tok::semi);
1287  } else if (ExpectAndConsume(tok::semi, diag::err_expected_after,
1288  Delete ? "delete" : "default")) {
1289  SkipUntil(tok::semi);
1290  }
1291 
1292  Stmt *GeneratedBody = Res ? Res->getBody() : nullptr;
1293  Actions.ActOnFinishFunctionBody(Res, GeneratedBody, false);
1294  return Res;
1295  }
1296 
1297  if (SkipFunctionBodies && (!Res || Actions.canSkipFunctionBody(Res)) &&
1298  trySkippingFunctionBody()) {
1299  BodyScope.Exit();
1300  Actions.ActOnSkippedFunctionBody(Res);
1301  return Actions.ActOnFinishFunctionBody(Res, nullptr, false);
1302  }
1303 
1304  if (Tok.is(tok::kw_try))
1305  return ParseFunctionTryBlock(Res, BodyScope);
1306 
1307  // If we have a colon, then we're probably parsing a C++
1308  // ctor-initializer.
1309  if (Tok.is(tok::colon)) {
1310  ParseConstructorInitializer(Res);
1311 
1312  // Recover from error.
1313  if (!Tok.is(tok::l_brace)) {
1314  BodyScope.Exit();
1315  Actions.ActOnFinishFunctionBody(Res, nullptr);
1316  return Res;
1317  }
1318  } else
1319  Actions.ActOnDefaultCtorInitializers(Res);
1320 
1321  // Late attributes are parsed in the same scope as the function body.
1322  if (LateParsedAttrs)
1323  ParseLexedAttributeList(*LateParsedAttrs, Res, false, true);
1324 
1325  return ParseFunctionStatementBody(Res, BodyScope);
1326 }
1327 
1328 void Parser::SkipFunctionBody() {
1329  if (Tok.is(tok::equal)) {
1330  SkipUntil(tok::semi);
1331  return;
1332  }
1333 
1334  bool IsFunctionTryBlock = Tok.is(tok::kw_try);
1335  if (IsFunctionTryBlock)
1336  ConsumeToken();
1337 
1338  CachedTokens Skipped;
1339  if (ConsumeAndStoreFunctionPrologue(Skipped))
1341  else {
1342  SkipUntil(tok::r_brace);
1343  while (IsFunctionTryBlock && Tok.is(tok::kw_catch)) {
1344  SkipUntil(tok::l_brace);
1345  SkipUntil(tok::r_brace);
1346  }
1347  }
1348 }
1349 
1350 /// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides
1351 /// types for a function with a K&R-style identifier list for arguments.
1352 void Parser::ParseKNRParamDeclarations(Declarator &D) {
1353  // We know that the top-level of this declarator is a function.
1355 
1356  // Enter function-declaration scope, limiting any declarators to the
1357  // function prototype scope, including parameter declarators.
1358  ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
1360 
1361  // Read all the argument declarations.
1362  while (isDeclarationSpecifier()) {
1363  SourceLocation DSStart = Tok.getLocation();
1364 
1365  // Parse the common declaration-specifiers piece.
1366  DeclSpec DS(AttrFactory);
1367  ParseDeclarationSpecifiers(DS);
1368 
1369  // C99 6.9.1p6: 'each declaration in the declaration list shall have at
1370  // least one declarator'.
1371  // NOTE: GCC just makes this an ext-warn. It's not clear what it does with
1372  // the declarations though. It's trivial to ignore them, really hard to do
1373  // anything else with them.
1374  if (TryConsumeToken(tok::semi)) {
1375  Diag(DSStart, diag::err_declaration_does_not_declare_param);
1376  continue;
1377  }
1378 
1379  // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other
1380  // than register.
1384  diag::err_invalid_storage_class_in_func_decl);
1386  }
1389  diag::err_invalid_storage_class_in_func_decl);
1391  }
1392 
1393  // Parse the first declarator attached to this declspec.
1394  Declarator ParmDeclarator(DS, DeclaratorContext::KNRTypeListContext);
1395  ParseDeclarator(ParmDeclarator);
1396 
1397  // Handle the full declarator list.
1398  while (1) {
1399  // If attributes are present, parse them.
1400  MaybeParseGNUAttributes(ParmDeclarator);
1401 
1402  // Ask the actions module to compute the type for this declarator.
1403  Decl *Param =
1404  Actions.ActOnParamDeclarator(getCurScope(), ParmDeclarator);
1405 
1406  if (Param &&
1407  // A missing identifier has already been diagnosed.
1408  ParmDeclarator.getIdentifier()) {
1409 
1410  // Scan the argument list looking for the correct param to apply this
1411  // type.
1412  for (unsigned i = 0; ; ++i) {
1413  // C99 6.9.1p6: those declarators shall declare only identifiers from
1414  // the identifier list.
1415  if (i == FTI.NumParams) {
1416  Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param)
1417  << ParmDeclarator.getIdentifier();
1418  break;
1419  }
1420 
1421  if (FTI.Params[i].Ident == ParmDeclarator.getIdentifier()) {
1422  // Reject redefinitions of parameters.
1423  if (FTI.Params[i].Param) {
1424  Diag(ParmDeclarator.getIdentifierLoc(),
1425  diag::err_param_redefinition)
1426  << ParmDeclarator.getIdentifier();
1427  } else {
1428  FTI.Params[i].Param = Param;
1429  }
1430  break;
1431  }
1432  }
1433  }
1434 
1435  // If we don't have a comma, it is either the end of the list (a ';') or
1436  // an error, bail out.
1437  if (Tok.isNot(tok::comma))
1438  break;
1439 
1440  ParmDeclarator.clear();
1441 
1442  // Consume the comma.
1443  ParmDeclarator.setCommaLoc(ConsumeToken());
1444 
1445  // Parse the next declarator.
1446  ParseDeclarator(ParmDeclarator);
1447  }
1448 
1449  // Consume ';' and continue parsing.
1450  if (!ExpectAndConsumeSemi(diag::err_expected_semi_declaration))
1451  continue;
1452 
1453  // Otherwise recover by skipping to next semi or mandatory function body.
1454  if (SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch))
1455  break;
1456  TryConsumeToken(tok::semi);
1457  }
1458 
1459  // The actions module must verify that all arguments were declared.
1461 }
1462 
1463 
1464 /// ParseAsmStringLiteral - This is just a normal string-literal, but is not
1465 /// allowed to be a wide string, and is not subject to character translation.
1466 ///
1467 /// [GNU] asm-string-literal:
1468 /// string-literal
1469 ///
1470 ExprResult Parser::ParseAsmStringLiteral() {
1471  if (!isTokenStringLiteral()) {
1472  Diag(Tok, diag::err_expected_string_literal)
1473  << /*Source='in...'*/0 << "'asm'";
1474  return ExprError();
1475  }
1476 
1477  ExprResult AsmString(ParseStringLiteralExpression());
1478  if (!AsmString.isInvalid()) {
1479  const auto *SL = cast<StringLiteral>(AsmString.get());
1480  if (!SL->isAscii()) {
1481  Diag(Tok, diag::err_asm_operand_wide_string_literal)
1482  << SL->isWide()
1483  << SL->getSourceRange();
1484  return ExprError();
1485  }
1486  }
1487  return AsmString;
1488 }
1489 
1490 /// ParseSimpleAsm
1491 ///
1492 /// [GNU] simple-asm-expr:
1493 /// 'asm' '(' asm-string-literal ')'
1494 ///
1495 ExprResult Parser::ParseSimpleAsm(SourceLocation *EndLoc) {
1496  assert(Tok.is(tok::kw_asm) && "Not an asm!");
1497  SourceLocation Loc = ConsumeToken();
1498 
1499  if (Tok.is(tok::kw_volatile)) {
1500  // Remove from the end of 'asm' to the end of 'volatile'.
1501  SourceRange RemovalRange(PP.getLocForEndOfToken(Loc),
1502  PP.getLocForEndOfToken(Tok.getLocation()));
1503 
1504  Diag(Tok, diag::warn_file_asm_volatile)
1505  << FixItHint::CreateRemoval(RemovalRange);
1506  ConsumeToken();
1507  }
1508 
1509  BalancedDelimiterTracker T(*this, tok::l_paren);
1510  if (T.consumeOpen()) {
1511  Diag(Tok, diag::err_expected_lparen_after) << "asm";
1512  return ExprError();
1513  }
1514 
1515  ExprResult Result(ParseAsmStringLiteral());
1516 
1517  if (!Result.isInvalid()) {
1518  // Close the paren and get the location of the end bracket
1519  T.consumeClose();
1520  if (EndLoc)
1521  *EndLoc = T.getCloseLocation();
1522  } else if (SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch)) {
1523  if (EndLoc)
1524  *EndLoc = Tok.getLocation();
1525  ConsumeParen();
1526  }
1527 
1528  return Result;
1529 }
1530 
1531 /// Get the TemplateIdAnnotation from the token and put it in the
1532 /// cleanup pool so that it gets destroyed when parsing the current top level
1533 /// declaration is finished.
1534 TemplateIdAnnotation *Parser::takeTemplateIdAnnotation(const Token &tok) {
1535  assert(tok.is(tok::annot_template_id) && "Expected template-id token");
1537  Id = static_cast<TemplateIdAnnotation *>(tok.getAnnotationValue());
1538  return Id;
1539 }
1540 
1541 void Parser::AnnotateScopeToken(CXXScopeSpec &SS, bool IsNewAnnotation) {
1542  // Push the current token back into the token stream (or revert it if it is
1543  // cached) and use an annotation scope token for current token.
1544  if (PP.isBacktrackEnabled())
1545  PP.RevertCachedTokens(1);
1546  else
1547  PP.EnterToken(Tok, /*IsReinject=*/true);
1548  Tok.setKind(tok::annot_cxxscope);
1550  Tok.setAnnotationRange(SS.getRange());
1551 
1552  // In case the tokens were cached, have Preprocessor replace them
1553  // with the annotation token. We don't need to do this if we've
1554  // just reverted back to a prior state.
1555  if (IsNewAnnotation)
1556  PP.AnnotateCachedTokens(Tok);
1557 }
1558 
1559 /// Attempt to classify the name at the current token position. This may
1560 /// form a type, scope or primary expression annotation, or replace the token
1561 /// with a typo-corrected keyword. This is only appropriate when the current
1562 /// name must refer to an entity which has already been declared.
1563 ///
1564 /// \param CCC Indicates how to perform typo-correction for this name. If NULL,
1565 /// no typo correction will be performed.
1566 Parser::AnnotatedNameKind
1567 Parser::TryAnnotateName(CorrectionCandidateCallback *CCC) {
1568  assert(Tok.is(tok::identifier) || Tok.is(tok::annot_cxxscope));
1569 
1570  const bool EnteringContext = false;
1571  const bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
1572 
1573  CXXScopeSpec SS;
1574  if (getLangOpts().CPlusPlus &&
1575  ParseOptionalCXXScopeSpecifier(SS, nullptr, EnteringContext))
1576  return ANK_Error;
1577 
1578  if (Tok.isNot(tok::identifier) || SS.isInvalid()) {
1579  if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(SS, !WasScopeAnnotation))
1580  return ANK_Error;
1581  return ANK_Unresolved;
1582  }
1583 
1584  IdentifierInfo *Name = Tok.getIdentifierInfo();
1585  SourceLocation NameLoc = Tok.getLocation();
1586 
1587  // FIXME: Move the tentative declaration logic into ClassifyName so we can
1588  // typo-correct to tentatively-declared identifiers.
1589  if (isTentativelyDeclared(Name)) {
1590  // Identifier has been tentatively declared, and thus cannot be resolved as
1591  // an expression. Fall back to annotating it as a type.
1592  if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(SS, !WasScopeAnnotation))
1593  return ANK_Error;
1594  return Tok.is(tok::annot_typename) ? ANK_Success : ANK_TentativeDecl;
1595  }
1596 
1597  Token Next = NextToken();
1598 
1599  // Look up and classify the identifier. We don't perform any typo-correction
1600  // after a scope specifier, because in general we can't recover from typos
1601  // there (eg, after correcting 'A::template B<X>::C' [sic], we would need to
1602  // jump back into scope specifier parsing).
1603  Sema::NameClassification Classification = Actions.ClassifyName(
1604  getCurScope(), SS, Name, NameLoc, Next, SS.isEmpty() ? CCC : nullptr);
1605 
1606  // If name lookup found nothing and we guessed that this was a template name,
1607  // double-check before committing to that interpretation. C++20 requires that
1608  // we interpret this as a template-id if it can be, but if it can't be, then
1609  // this is an error recovery case.
1610  if (Classification.getKind() == Sema::NC_UndeclaredTemplate &&
1611  isTemplateArgumentList(1) == TPResult::False) {
1612  // It's not a template-id; re-classify without the '<' as a hint.
1613  Token FakeNext = Next;
1614  FakeNext.setKind(tok::unknown);
1615  Classification =
1616  Actions.ClassifyName(getCurScope(), SS, Name, NameLoc, FakeNext,
1617  SS.isEmpty() ? CCC : nullptr);
1618  }
1619 
1620  switch (Classification.getKind()) {
1621  case Sema::NC_Error:
1622  return ANK_Error;
1623 
1624  case Sema::NC_Keyword:
1625  // The identifier was typo-corrected to a keyword.
1626  Tok.setIdentifierInfo(Name);
1627  Tok.setKind(Name->getTokenID());
1628  PP.TypoCorrectToken(Tok);
1629  if (SS.isNotEmpty())
1630  AnnotateScopeToken(SS, !WasScopeAnnotation);
1631  // We've "annotated" this as a keyword.
1632  return ANK_Success;
1633 
1634  case Sema::NC_Unknown:
1635  // It's not something we know about. Leave it unannotated.
1636  break;
1637 
1638  case Sema::NC_Type: {
1639  SourceLocation BeginLoc = NameLoc;
1640  if (SS.isNotEmpty())
1641  BeginLoc = SS.getBeginLoc();
1642 
1643  /// An Objective-C object type followed by '<' is a specialization of
1644  /// a parameterized class type or a protocol-qualified type.
1645  ParsedType Ty = Classification.getType();
1646  if (getLangOpts().ObjC && NextToken().is(tok::less) &&
1647  (Ty.get()->isObjCObjectType() ||
1648  Ty.get()->isObjCObjectPointerType())) {
1649  // Consume the name.
1651  SourceLocation NewEndLoc;
1652  TypeResult NewType
1653  = parseObjCTypeArgsAndProtocolQualifiers(IdentifierLoc, Ty,
1654  /*consumeLastToken=*/false,
1655  NewEndLoc);
1656  if (NewType.isUsable())
1657  Ty = NewType.get();
1658  else if (Tok.is(tok::eof)) // Nothing to do here, bail out...
1659  return ANK_Error;
1660  }
1661 
1662  Tok.setKind(tok::annot_typename);
1663  setTypeAnnotation(Tok, Ty);
1664  Tok.setAnnotationEndLoc(Tok.getLocation());
1665  Tok.setLocation(BeginLoc);
1666  PP.AnnotateCachedTokens(Tok);
1667  return ANK_Success;
1668  }
1669 
1671  Tok.setKind(tok::annot_primary_expr);
1672  setExprAnnotation(Tok, Classification.getExpression());
1673  Tok.setAnnotationEndLoc(NameLoc);
1674  if (SS.isNotEmpty())
1675  Tok.setLocation(SS.getBeginLoc());
1676  PP.AnnotateCachedTokens(Tok);
1677  return ANK_Success;
1678 
1679  case Sema::NC_NonType:
1680  Tok.setKind(tok::annot_non_type);
1681  setNonTypeAnnotation(Tok, Classification.getNonTypeDecl());
1682  Tok.setLocation(NameLoc);
1683  Tok.setAnnotationEndLoc(NameLoc);
1684  PP.AnnotateCachedTokens(Tok);
1685  if (SS.isNotEmpty())
1686  AnnotateScopeToken(SS, !WasScopeAnnotation);
1687  return ANK_Success;
1688 
1691  Tok.setKind(Classification.getKind() == Sema::NC_UndeclaredNonType
1692  ? tok::annot_non_type_undeclared
1693  : tok::annot_non_type_dependent);
1694  setIdentifierAnnotation(Tok, Name);
1695  Tok.setLocation(NameLoc);
1696  Tok.setAnnotationEndLoc(NameLoc);
1697  PP.AnnotateCachedTokens(Tok);
1698  if (SS.isNotEmpty())
1699  AnnotateScopeToken(SS, !WasScopeAnnotation);
1700  return ANK_Success;
1701 
1702  case Sema::NC_TypeTemplate:
1703  if (Next.isNot(tok::less)) {
1704  // This may be a type template being used as a template template argument.
1705  if (SS.isNotEmpty())
1706  AnnotateScopeToken(SS, !WasScopeAnnotation);
1707  return ANK_TemplateName;
1708  }
1709  LLVM_FALLTHROUGH;
1710  case Sema::NC_VarTemplate:
1713  // We have a type, variable or function template followed by '<'.
1714  ConsumeToken();
1715  UnqualifiedId Id;
1716  Id.setIdentifier(Name, NameLoc);
1717  if (AnnotateTemplateIdToken(
1718  TemplateTy::make(Classification.getTemplateName()),
1719  Classification.getTemplateNameKind(), SS, SourceLocation(), Id))
1720  return ANK_Error;
1721  return ANK_Success;
1722  }
1723  }
1724 
1725  // Unable to classify the name, but maybe we can annotate a scope specifier.
1726  if (SS.isNotEmpty())
1727  AnnotateScopeToken(SS, !WasScopeAnnotation);
1728  return ANK_Unresolved;
1729 }
1730 
1731 bool Parser::TryKeywordIdentFallback(bool DisableKeyword) {
1732  assert(Tok.isNot(tok::identifier));
1733  Diag(Tok, diag::ext_keyword_as_ident)
1734  << PP.getSpelling(Tok)
1735  << DisableKeyword;
1736  if (DisableKeyword)
1738  Tok.setKind(tok::identifier);
1739  return true;
1740 }
1741 
1742 /// TryAnnotateTypeOrScopeToken - If the current token position is on a
1743 /// typename (possibly qualified in C++) or a C++ scope specifier not followed
1744 /// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens
1745 /// with a single annotation token representing the typename or C++ scope
1746 /// respectively.
1747 /// This simplifies handling of C++ scope specifiers and allows efficient
1748 /// backtracking without the need to re-parse and resolve nested-names and
1749 /// typenames.
1750 /// It will mainly be called when we expect to treat identifiers as typenames
1751 /// (if they are typenames). For example, in C we do not expect identifiers
1752 /// inside expressions to be treated as typenames so it will not be called
1753 /// for expressions in C.
1754 /// The benefit for C/ObjC is that a typename will be annotated and
1755 /// Actions.getTypeName will not be needed to be called again (e.g. getTypeName
1756 /// will not be called twice, once to check whether we have a declaration
1757 /// specifier, and another one to get the actual type inside
1758 /// ParseDeclarationSpecifiers).
1759 ///
1760 /// This returns true if an error occurred.
1761 ///
1762 /// Note that this routine emits an error if you call it with ::new or ::delete
1763 /// as the current tokens, so only call it in contexts where these are invalid.
1765  assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
1766  Tok.is(tok::kw_typename) || Tok.is(tok::annot_cxxscope) ||
1767  Tok.is(tok::kw_decltype) || Tok.is(tok::annot_template_id) ||
1768  Tok.is(tok::kw___super)) &&
1769  "Cannot be a type or scope token!");
1770 
1771  if (Tok.is(tok::kw_typename)) {
1772  // MSVC lets you do stuff like:
1773  // typename typedef T_::D D;
1774  //
1775  // We will consume the typedef token here and put it back after we have
1776  // parsed the first identifier, transforming it into something more like:
1777  // typename T_::D typedef D;
1778  if (getLangOpts().MSVCCompat && NextToken().is(tok::kw_typedef)) {
1779  Token TypedefToken;
1780  PP.Lex(TypedefToken);
1782  PP.EnterToken(Tok, /*IsReinject=*/true);
1783  Tok = TypedefToken;
1784  if (!Result)
1785  Diag(Tok.getLocation(), diag::warn_expected_qualified_after_typename);
1786  return Result;
1787  }
1788 
1789  // Parse a C++ typename-specifier, e.g., "typename T::type".
1790  //
1791  // typename-specifier:
1792  // 'typename' '::' [opt] nested-name-specifier identifier
1793  // 'typename' '::' [opt] nested-name-specifier template [opt]
1794  // simple-template-id
1795  SourceLocation TypenameLoc = ConsumeToken();
1796  CXXScopeSpec SS;
1797  if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
1798  /*EnteringContext=*/false, nullptr,
1799  /*IsTypename*/ true))
1800  return true;
1801  if (!SS.isSet()) {
1802  if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id) ||
1803  Tok.is(tok::annot_decltype)) {
1804  // Attempt to recover by skipping the invalid 'typename'
1805  if (Tok.is(tok::annot_decltype) ||
1806  (!TryAnnotateTypeOrScopeToken() && Tok.isAnnotation())) {
1807  unsigned DiagID = diag::err_expected_qualified_after_typename;
1808  // MS compatibility: MSVC permits using known types with typename.
1809  // e.g. "typedef typename T* pointer_type"
1810  if (getLangOpts().MicrosoftExt)
1811  DiagID = diag::warn_expected_qualified_after_typename;
1812  Diag(Tok.getLocation(), DiagID);
1813  return false;
1814  }
1815  }
1816  if (Tok.isEditorPlaceholder())
1817  return true;
1818 
1819  Diag(Tok.getLocation(), diag::err_expected_qualified_after_typename);
1820  return true;
1821  }
1822 
1823  TypeResult Ty;
1824  if (Tok.is(tok::identifier)) {
1825  // FIXME: check whether the next token is '<', first!
1826  Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
1827  *Tok.getIdentifierInfo(),
1828  Tok.getLocation());
1829  } else if (Tok.is(tok::annot_template_id)) {
1830  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1831  if (TemplateId->Kind != TNK_Type_template &&
1832  TemplateId->Kind != TNK_Dependent_template_name &&
1833  TemplateId->Kind != TNK_Undeclared_template) {
1834  Diag(Tok, diag::err_typename_refers_to_non_type_template)
1835  << Tok.getAnnotationRange();
1836  return true;
1837  }
1838 
1839  ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
1840  TemplateId->NumArgs);
1841 
1842  Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
1843  TemplateId->TemplateKWLoc,
1844  TemplateId->Template,
1845  TemplateId->Name,
1846  TemplateId->TemplateNameLoc,
1847  TemplateId->LAngleLoc,
1848  TemplateArgsPtr,
1849  TemplateId->RAngleLoc);
1850  } else {
1851  Diag(Tok, diag::err_expected_type_name_after_typename)
1852  << SS.getRange();
1853  return true;
1854  }
1855 
1856  SourceLocation EndLoc = Tok.getLastLoc();
1857  Tok.setKind(tok::annot_typename);
1858  setTypeAnnotation(Tok, Ty.isInvalid() ? nullptr : Ty.get());
1859  Tok.setAnnotationEndLoc(EndLoc);
1860  Tok.setLocation(TypenameLoc);
1861  PP.AnnotateCachedTokens(Tok);
1862  return false;
1863  }
1864 
1865  // Remembers whether the token was originally a scope annotation.
1866  bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
1867 
1868  CXXScopeSpec SS;
1869  if (getLangOpts().CPlusPlus)
1870  if (ParseOptionalCXXScopeSpecifier(SS, nullptr, /*EnteringContext*/false))
1871  return true;
1872 
1873  return TryAnnotateTypeOrScopeTokenAfterScopeSpec(SS, !WasScopeAnnotation);
1874 }
1875 
1876 /// Try to annotate a type or scope token, having already parsed an
1877 /// optional scope specifier. \p IsNewScope should be \c true unless the scope
1878 /// specifier was extracted from an existing tok::annot_cxxscope annotation.
1880  bool IsNewScope) {
1881  if (Tok.is(tok::identifier)) {
1882  // Determine whether the identifier is a type name.
1883  if (ParsedType Ty = Actions.getTypeName(
1884  *Tok.getIdentifierInfo(), Tok.getLocation(), getCurScope(), &SS,
1885  false, NextToken().is(tok::period), nullptr,
1886  /*IsCtorOrDtorName=*/false,
1887  /*NonTrivialTypeSourceInfo*/true,
1888  /*IsClassTemplateDeductionContext*/true)) {
1889  SourceLocation BeginLoc = Tok.getLocation();
1890  if (SS.isNotEmpty()) // it was a C++ qualified type name.
1891  BeginLoc = SS.getBeginLoc();
1892 
1893  /// An Objective-C object type followed by '<' is a specialization of
1894  /// a parameterized class type or a protocol-qualified type.
1895  if (getLangOpts().ObjC && NextToken().is(tok::less) &&
1896  (Ty.get()->isObjCObjectType() ||
1897  Ty.get()->isObjCObjectPointerType())) {
1898  // Consume the name.
1900  SourceLocation NewEndLoc;
1901  TypeResult NewType
1902  = parseObjCTypeArgsAndProtocolQualifiers(IdentifierLoc, Ty,
1903  /*consumeLastToken=*/false,
1904  NewEndLoc);
1905  if (NewType.isUsable())
1906  Ty = NewType.get();
1907  else if (Tok.is(tok::eof)) // Nothing to do here, bail out...
1908  return false;
1909  }
1910 
1911  // This is a typename. Replace the current token in-place with an
1912  // annotation type token.
1913  Tok.setKind(tok::annot_typename);
1914  setTypeAnnotation(Tok, Ty);
1915  Tok.setAnnotationEndLoc(Tok.getLocation());
1916  Tok.setLocation(BeginLoc);
1917 
1918  // In case the tokens were cached, have Preprocessor replace
1919  // them with the annotation token.
1920  PP.AnnotateCachedTokens(Tok);
1921  return false;
1922  }
1923 
1924  if (!getLangOpts().CPlusPlus) {
1925  // If we're in C, we can't have :: tokens at all (the lexer won't return
1926  // them). If the identifier is not a type, then it can't be scope either,
1927  // just early exit.
1928  return false;
1929  }
1930 
1931  // If this is a template-id, annotate with a template-id or type token.
1932  // FIXME: This appears to be dead code. We already have formed template-id
1933  // tokens when parsing the scope specifier; this can never form a new one.
1934  if (NextToken().is(tok::less)) {
1935  TemplateTy Template;
1937  TemplateName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
1938  bool MemberOfUnknownSpecialization;
1939  if (TemplateNameKind TNK = Actions.isTemplateName(
1940  getCurScope(), SS,
1941  /*hasTemplateKeyword=*/false, TemplateName,
1942  /*ObjectType=*/nullptr, /*EnteringContext*/false, Template,
1943  MemberOfUnknownSpecialization)) {
1944  // Only annotate an undeclared template name as a template-id if the
1945  // following tokens have the form of a template argument list.
1946  if (TNK != TNK_Undeclared_template ||
1947  isTemplateArgumentList(1) != TPResult::False) {
1948  // Consume the identifier.
1949  ConsumeToken();
1950  if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(),
1951  TemplateName)) {
1952  // If an unrecoverable error occurred, we need to return true here,
1953  // because the token stream is in a damaged state. We may not
1954  // return a valid identifier.
1955  return true;
1956  }
1957  }
1958  }
1959  }
1960 
1961  // The current token, which is either an identifier or a
1962  // template-id, is not part of the annotation. Fall through to
1963  // push that token back into the stream and complete the C++ scope
1964  // specifier annotation.
1965  }
1966 
1967  if (Tok.is(tok::annot_template_id)) {
1968  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1969  if (TemplateId->Kind == TNK_Type_template) {
1970  // A template-id that refers to a type was parsed into a
1971  // template-id annotation in a context where we weren't allowed
1972  // to produce a type annotation token. Update the template-id
1973  // annotation token to a type annotation token now.
1974  AnnotateTemplateIdTokenAsType();
1975  return false;
1976  }
1977  }
1978 
1979  if (SS.isEmpty())
1980  return false;
1981 
1982  // A C++ scope specifier that isn't followed by a typename.
1983  AnnotateScopeToken(SS, IsNewScope);
1984  return false;
1985 }
1986 
1987 /// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only
1988 /// annotates C++ scope specifiers and template-ids. This returns
1989 /// true if there was an error that could not be recovered from.
1990 ///
1991 /// Note that this routine emits an error if you call it with ::new or ::delete
1992 /// as the current tokens, so only call it in contexts where these are invalid.
1993 bool Parser::TryAnnotateCXXScopeToken(bool EnteringContext) {
1994  assert(getLangOpts().CPlusPlus &&
1995  "Call sites of this function should be guarded by checking for C++");
1996  assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
1997  (Tok.is(tok::annot_template_id) && NextToken().is(tok::coloncolon)) ||
1998  Tok.is(tok::kw_decltype) || Tok.is(tok::kw___super)) &&
1999  "Cannot be a type or scope token!");
2000 
2001  CXXScopeSpec SS;
2002  if (ParseOptionalCXXScopeSpecifier(SS, nullptr, EnteringContext))
2003  return true;
2004  if (SS.isEmpty())
2005  return false;
2006 
2007  AnnotateScopeToken(SS, true);
2008  return false;
2009 }
2010 
2011 bool Parser::isTokenEqualOrEqualTypo() {
2012  tok::TokenKind Kind = Tok.getKind();
2013  switch (Kind) {
2014  default:
2015  return false;
2016  case tok::ampequal: // &=
2017  case tok::starequal: // *=
2018  case tok::plusequal: // +=
2019  case tok::minusequal: // -=
2020  case tok::exclaimequal: // !=
2021  case tok::slashequal: // /=
2022  case tok::percentequal: // %=
2023  case tok::lessequal: // <=
2024  case tok::lesslessequal: // <<=
2025  case tok::greaterequal: // >=
2026  case tok::greatergreaterequal: // >>=
2027  case tok::caretequal: // ^=
2028  case tok::pipeequal: // |=
2029  case tok::equalequal: // ==
2030  Diag(Tok, diag::err_invalid_token_after_declarator_suggest_equal)
2031  << Kind
2033  LLVM_FALLTHROUGH;
2034  case tok::equal:
2035  return true;
2036  }
2037 }
2038 
2039 SourceLocation Parser::handleUnexpectedCodeCompletionToken() {
2040  assert(Tok.is(tok::code_completion));
2041  PrevTokLocation = Tok.getLocation();
2042 
2043  for (Scope *S = getCurScope(); S; S = S->getParent()) {
2044  if (S->getFlags() & Scope::FnScope) {
2047  cutOffParsing();
2048  return PrevTokLocation;
2049  }
2050 
2051  if (S->getFlags() & Scope::ClassScope) {
2053  cutOffParsing();
2054  return PrevTokLocation;
2055  }
2056  }
2057 
2059  cutOffParsing();
2060  return PrevTokLocation;
2061 }
2062 
2063 // Code-completion pass-through functions
2064 
2065 void Parser::CodeCompleteDirective(bool InConditional) {
2066  Actions.CodeCompletePreprocessorDirective(InConditional);
2067 }
2068 
2069 void Parser::CodeCompleteInConditionalExclusion() {
2071 }
2072 
2073 void Parser::CodeCompleteMacroName(bool IsDefinition) {
2074  Actions.CodeCompletePreprocessorMacroName(IsDefinition);
2075 }
2076 
2077 void Parser::CodeCompletePreprocessorExpression() {
2079 }
2080 
2081 void Parser::CodeCompleteMacroArgument(IdentifierInfo *Macro,
2083  unsigned ArgumentIndex) {
2084  Actions.CodeCompletePreprocessorMacroArgument(getCurScope(), Macro, MacroInfo,
2085  ArgumentIndex);
2086 }
2087 
2088 void Parser::CodeCompleteIncludedFile(llvm::StringRef Dir, bool IsAngled) {
2089  Actions.CodeCompleteIncludedFile(Dir, IsAngled);
2090 }
2091 
2092 void Parser::CodeCompleteNaturalLanguage() {
2093  Actions.CodeCompleteNaturalLanguage();
2094 }
2095 
2096 bool Parser::ParseMicrosoftIfExistsCondition(IfExistsCondition& Result) {
2097  assert((Tok.is(tok::kw___if_exists) || Tok.is(tok::kw___if_not_exists)) &&
2098  "Expected '__if_exists' or '__if_not_exists'");
2099  Result.IsIfExists = Tok.is(tok::kw___if_exists);
2100  Result.KeywordLoc = ConsumeToken();
2101 
2102  BalancedDelimiterTracker T(*this, tok::l_paren);
2103  if (T.consumeOpen()) {
2104  Diag(Tok, diag::err_expected_lparen_after)
2105  << (Result.IsIfExists? "__if_exists" : "__if_not_exists");
2106  return true;
2107  }
2108 
2109  // Parse nested-name-specifier.
2110  if (getLangOpts().CPlusPlus)
2111  ParseOptionalCXXScopeSpecifier(Result.SS, nullptr,
2112  /*EnteringContext=*/false);
2113 
2114  // Check nested-name specifier.
2115  if (Result.SS.isInvalid()) {
2116  T.skipToEnd();
2117  return true;
2118  }
2119 
2120  // Parse the unqualified-id.
2121  SourceLocation TemplateKWLoc; // FIXME: parsed, but unused.
2122  if (ParseUnqualifiedId(
2123  Result.SS, /*EnteringContext*/false, /*AllowDestructorName*/true,
2124  /*AllowConstructorName*/true, /*AllowDeductionGuide*/false, nullptr,
2125  &TemplateKWLoc, Result.Name)) {
2126  T.skipToEnd();
2127  return true;
2128  }
2129 
2130  if (T.consumeClose())
2131  return true;
2132 
2133  // Check if the symbol exists.
2134  switch (Actions.CheckMicrosoftIfExistsSymbol(getCurScope(), Result.KeywordLoc,
2135  Result.IsIfExists, Result.SS,
2136  Result.Name)) {
2137  case Sema::IER_Exists:
2138  Result.Behavior = Result.IsIfExists ? IEB_Parse : IEB_Skip;
2139  break;
2140 
2142  Result.Behavior = !Result.IsIfExists ? IEB_Parse : IEB_Skip;
2143  break;
2144 
2145  case Sema::IER_Dependent:
2146  Result.Behavior = IEB_Dependent;
2147  break;
2148 
2149  case Sema::IER_Error:
2150  return true;
2151  }
2152 
2153  return false;
2154 }
2155 
2156 void Parser::ParseMicrosoftIfExistsExternalDeclaration() {
2157  IfExistsCondition Result;
2158  if (ParseMicrosoftIfExistsCondition(Result))
2159  return;
2160 
2161  BalancedDelimiterTracker Braces(*this, tok::l_brace);
2162  if (Braces.consumeOpen()) {
2163  Diag(Tok, diag::err_expected) << tok::l_brace;
2164  return;
2165  }
2166 
2167  switch (Result.Behavior) {
2168  case IEB_Parse:
2169  // Parse declarations below.
2170  break;
2171 
2172  case IEB_Dependent:
2173  llvm_unreachable("Cannot have a dependent external declaration");
2174 
2175  case IEB_Skip:
2176  Braces.skipToEnd();
2177  return;
2178  }
2179 
2180  // Parse the declarations.
2181  // FIXME: Support module import within __if_exists?
2182  while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
2183  ParsedAttributesWithRange attrs(AttrFactory);
2184  MaybeParseCXX11Attributes(attrs);
2185  DeclGroupPtrTy Result = ParseExternalDeclaration(attrs);
2186  if (Result && !getCurScope()->getParent())
2187  Actions.getASTConsumer().HandleTopLevelDecl(Result.get());
2188  }
2189  Braces.consumeClose();
2190 }
2191 
2192 /// Parse a declaration beginning with the 'module' keyword or C++20
2193 /// context-sensitive keyword (optionally preceded by 'export').
2194 ///
2195 /// module-declaration: [Modules TS + P0629R0]
2196 /// 'export'[opt] 'module' module-name attribute-specifier-seq[opt] ';'
2197 ///
2198 /// global-module-fragment: [C++2a]
2199 /// 'module' ';' top-level-declaration-seq[opt]
2200 /// module-declaration: [C++2a]
2201 /// 'export'[opt] 'module' module-name module-partition[opt]
2202 /// attribute-specifier-seq[opt] ';'
2203 /// private-module-fragment: [C++2a]
2204 /// 'module' ':' 'private' ';' top-level-declaration-seq[opt]
2205 Parser::DeclGroupPtrTy Parser::ParseModuleDecl(bool IsFirstDecl) {
2206  SourceLocation StartLoc = Tok.getLocation();
2207 
2208  Sema::ModuleDeclKind MDK = TryConsumeToken(tok::kw_export)
2211 
2212  assert(
2213  (Tok.is(tok::kw_module) ||
2214  (Tok.is(tok::identifier) && Tok.getIdentifierInfo() == Ident_module)) &&
2215  "not a module declaration");
2216  SourceLocation ModuleLoc = ConsumeToken();
2217 
2218  // Attributes appear after the module name, not before.
2219  // FIXME: Suggest moving the attributes later with a fixit.
2220  DiagnoseAndSkipCXX11Attributes();
2221 
2222  // Parse a global-module-fragment, if present.
2223  if (getLangOpts().CPlusPlusModules && Tok.is(tok::semi)) {
2224  SourceLocation SemiLoc = ConsumeToken();
2225  if (!IsFirstDecl) {
2226  Diag(StartLoc, diag::err_global_module_introducer_not_at_start)
2227  << SourceRange(StartLoc, SemiLoc);
2228  return nullptr;
2229  }
2230  if (MDK == Sema::ModuleDeclKind::Interface) {
2231  Diag(StartLoc, diag::err_module_fragment_exported)
2232  << /*global*/0 << FixItHint::CreateRemoval(StartLoc);
2233  }
2234  return Actions.ActOnGlobalModuleFragmentDecl(ModuleLoc);
2235  }
2236 
2237  // Parse a private-module-fragment, if present.
2238  if (getLangOpts().CPlusPlusModules && Tok.is(tok::colon) &&
2239  NextToken().is(tok::kw_private)) {
2240  if (MDK == Sema::ModuleDeclKind::Interface) {
2241  Diag(StartLoc, diag::err_module_fragment_exported)
2242  << /*private*/1 << FixItHint::CreateRemoval(StartLoc);
2243  }
2244  ConsumeToken();
2245  SourceLocation PrivateLoc = ConsumeToken();
2246  DiagnoseAndSkipCXX11Attributes();
2247  ExpectAndConsumeSemi(diag::err_private_module_fragment_expected_semi);
2248  return Actions.ActOnPrivateModuleFragmentDecl(ModuleLoc, PrivateLoc);
2249  }
2250 
2252  if (ParseModuleName(ModuleLoc, Path, /*IsImport*/false))
2253  return nullptr;
2254 
2255  // Parse the optional module-partition.
2256  if (Tok.is(tok::colon)) {
2259  if (ParseModuleName(ModuleLoc, Partition, /*IsImport*/false))
2260  return nullptr;
2261 
2262  // FIXME: Support module partition declarations.
2263  Diag(ColonLoc, diag::err_unsupported_module_partition)
2264  << SourceRange(ColonLoc, Partition.back().second);
2265  // Recover by parsing as a non-partition.
2266  }
2267 
2268  // We don't support any module attributes yet; just parse them and diagnose.
2269  ParsedAttributesWithRange Attrs(AttrFactory);
2270  MaybeParseCXX11Attributes(Attrs);
2271  ProhibitCXX11Attributes(Attrs, diag::err_attribute_not_module_attr);
2272 
2273  ExpectAndConsumeSemi(diag::err_module_expected_semi);
2274 
2275  return Actions.ActOnModuleDecl(StartLoc, ModuleLoc, MDK, Path, IsFirstDecl);
2276 }
2277 
2278 /// Parse a module import declaration. This is essentially the same for
2279 /// Objective-C and the C++ Modules TS, except for the leading '@' (in ObjC)
2280 /// and the trailing optional attributes (in C++).
2281 ///
2282 /// [ObjC] @import declaration:
2283 /// '@' 'import' module-name ';'
2284 /// [ModTS] module-import-declaration:
2285 /// 'import' module-name attribute-specifier-seq[opt] ';'
2286 /// [C++2a] module-import-declaration:
2287 /// 'export'[opt] 'import' module-name
2288 /// attribute-specifier-seq[opt] ';'
2289 /// 'export'[opt] 'import' module-partition
2290 /// attribute-specifier-seq[opt] ';'
2291 /// 'export'[opt] 'import' header-name
2292 /// attribute-specifier-seq[opt] ';'
2293 Decl *Parser::ParseModuleImport(SourceLocation AtLoc) {
2294  SourceLocation StartLoc = AtLoc.isInvalid() ? Tok.getLocation() : AtLoc;
2295 
2296  SourceLocation ExportLoc;
2297  TryConsumeToken(tok::kw_export, ExportLoc);
2298 
2299  assert((AtLoc.isInvalid() ? Tok.isOneOf(tok::kw_import, tok::identifier)
2300  : Tok.isObjCAtKeyword(tok::objc_import)) &&
2301  "Improper start to module import");
2302  bool IsObjCAtImport = Tok.isObjCAtKeyword(tok::objc_import);
2303  SourceLocation ImportLoc = ConsumeToken();
2304 
2306  Module *HeaderUnit = nullptr;
2307 
2308  if (Tok.is(tok::header_name)) {
2309  // This is a header import that the preprocessor decided we should skip
2310  // because it was malformed in some way. Parse and ignore it; it's already
2311  // been diagnosed.
2312  ConsumeToken();
2313  } else if (Tok.is(tok::annot_header_unit)) {
2314  // This is a header import that the preprocessor mapped to a module import.
2315  HeaderUnit = reinterpret_cast<Module *>(Tok.getAnnotationValue());
2316  ConsumeAnnotationToken();
2317  } else if (getLangOpts().CPlusPlusModules && Tok.is(tok::colon)) {
2319  if (ParseModuleName(ImportLoc, Path, /*IsImport*/true))
2320  return nullptr;
2321 
2322  // FIXME: Support module partition import.
2323  Diag(ColonLoc, diag::err_unsupported_module_partition)
2324  << SourceRange(ColonLoc, Path.back().second);
2325  return nullptr;
2326  } else {
2327  if (ParseModuleName(ImportLoc, Path, /*IsImport*/true))
2328  return nullptr;
2329  }
2330 
2331  ParsedAttributesWithRange Attrs(AttrFactory);
2332  MaybeParseCXX11Attributes(Attrs);
2333  // We don't support any module import attributes yet.
2334  ProhibitCXX11Attributes(Attrs, diag::err_attribute_not_import_attr);
2335 
2336  if (PP.hadModuleLoaderFatalFailure()) {
2337  // With a fatal failure in the module loader, we abort parsing.
2338  cutOffParsing();
2339  return nullptr;
2340  }
2341 
2342  DeclResult Import;
2343  if (HeaderUnit)
2344  Import =
2345  Actions.ActOnModuleImport(StartLoc, ExportLoc, ImportLoc, HeaderUnit);
2346  else if (!Path.empty())
2347  Import = Actions.ActOnModuleImport(StartLoc, ExportLoc, ImportLoc, Path);
2348  ExpectAndConsumeSemi(diag::err_module_expected_semi);
2349  if (Import.isInvalid())
2350  return nullptr;
2351 
2352  // Using '@import' in framework headers requires modules to be enabled so that
2353  // the header is parseable. Emit a warning to make the user aware.
2354  if (IsObjCAtImport && AtLoc.isValid()) {
2355  auto &SrcMgr = PP.getSourceManager();
2356  auto *FE = SrcMgr.getFileEntryForID(SrcMgr.getFileID(AtLoc));
2357  if (FE && llvm::sys::path::parent_path(FE->getDir()->getName())
2358  .endswith(".framework"))
2359  Diags.Report(AtLoc, diag::warn_atimport_in_framework_header);
2360  }
2361 
2362  return Import.get();
2363 }
2364 
2365 /// Parse a C++ Modules TS / Objective-C module name (both forms use the same
2366 /// grammar).
2367 ///
2368 /// module-name:
2369 /// module-name-qualifier[opt] identifier
2370 /// module-name-qualifier:
2371 /// module-name-qualifier[opt] identifier '.'
2372 bool Parser::ParseModuleName(
2373  SourceLocation UseLoc,
2374  SmallVectorImpl<std::pair<IdentifierInfo *, SourceLocation>> &Path,
2375  bool IsImport) {
2376  // Parse the module path.
2377  while (true) {
2378  if (!Tok.is(tok::identifier)) {
2379  if (Tok.is(tok::code_completion)) {
2380  Actions.CodeCompleteModuleImport(UseLoc, Path);
2381  cutOffParsing();
2382  return true;
2383  }
2384 
2385  Diag(Tok, diag::err_module_expected_ident) << IsImport;
2386  SkipUntil(tok::semi);
2387  return true;
2388  }
2389 
2390  // Record this part of the module path.
2391  Path.push_back(std::make_pair(Tok.getIdentifierInfo(), Tok.getLocation()));
2392  ConsumeToken();
2393 
2394  if (Tok.isNot(tok::period))
2395  return false;
2396 
2397  ConsumeToken();
2398  }
2399 }
2400 
2401 /// Try recover parser when module annotation appears where it must not
2402 /// be found.
2403 /// \returns false if the recover was successful and parsing may be continued, or
2404 /// true if parser must bail out to top level and handle the token there.
2405 bool Parser::parseMisplacedModuleImport() {
2406  while (true) {
2407  switch (Tok.getKind()) {
2408  case tok::annot_module_end:
2409  // If we recovered from a misplaced module begin, we expect to hit a
2410  // misplaced module end too. Stay in the current context when this
2411  // happens.
2412  if (MisplacedModuleBeginCount) {
2413  --MisplacedModuleBeginCount;
2414  Actions.ActOnModuleEnd(Tok.getLocation(),
2415  reinterpret_cast<Module *>(
2416  Tok.getAnnotationValue()));
2417  ConsumeAnnotationToken();
2418  continue;
2419  }
2420  // Inform caller that recovery failed, the error must be handled at upper
2421  // level. This will generate the desired "missing '}' at end of module"
2422  // diagnostics on the way out.
2423  return true;
2424  case tok::annot_module_begin:
2425  // Recover by entering the module (Sema will diagnose).
2426  Actions.ActOnModuleBegin(Tok.getLocation(),
2427  reinterpret_cast<Module *>(
2428  Tok.getAnnotationValue()));
2429  ConsumeAnnotationToken();
2430  ++MisplacedModuleBeginCount;
2431  continue;
2432  case tok::annot_module_include:
2433  // Module import found where it should not be, for instance, inside a
2434  // namespace. Recover by importing the module.
2435  Actions.ActOnModuleInclude(Tok.getLocation(),
2436  reinterpret_cast<Module *>(
2437  Tok.getAnnotationValue()));
2438  ConsumeAnnotationToken();
2439  // If there is another module import, process it.
2440  continue;
2441  default:
2442  return false;
2443  }
2444  }
2445  return false;
2446 }
2447 
2448 bool BalancedDelimiterTracker::diagnoseOverflow() {
2449  P.Diag(P.Tok, diag::err_bracket_depth_exceeded)
2450  << P.getLangOpts().BracketDepth;
2451  P.Diag(P.Tok, diag::note_bracket_depth);
2452  P.cutOffParsing();
2453  return true;
2454 }
2455 
2457  const char *Msg,
2458  tok::TokenKind SkipToTok) {
2459  LOpen = P.Tok.getLocation();
2460  if (P.ExpectAndConsume(Kind, DiagID, Msg)) {
2461  if (SkipToTok != tok::unknown)
2462  P.SkipUntil(SkipToTok, Parser::StopAtSemi);
2463  return true;
2464  }
2465 
2466  if (getDepth() < P.getLangOpts().BracketDepth)
2467  return false;
2468 
2469  return diagnoseOverflow();
2470 }
2471 
2472 bool BalancedDelimiterTracker::diagnoseMissingClose() {
2473  assert(!P.Tok.is(Close) && "Should have consumed closing delimiter");
2474 
2475  if (P.Tok.is(tok::annot_module_end))
2476  P.Diag(P.Tok, diag::err_missing_before_module_end) << Close;
2477  else
2478  P.Diag(P.Tok, diag::err_expected) << Close;
2479  P.Diag(LOpen, diag::note_matching) << Kind;
2480 
2481  // If we're not already at some kind of closing bracket, skip to our closing
2482  // token.
2483  if (P.Tok.isNot(tok::r_paren) && P.Tok.isNot(tok::r_brace) &&
2484  P.Tok.isNot(tok::r_square) &&
2485  P.SkipUntil(Close, FinalToken,
2487  P.Tok.is(Close))
2488  LClose = P.ConsumeAnyToken();
2489  return true;
2490 }
2491 
2493  P.SkipUntil(Close, Parser::StopBeforeMatch);
2494  consumeClose();
2495 }
The name denotes a member of a dependent type that could not be resolved.
Definition: Sema.h:1882
Defines the clang::ASTContext interface.
The name was classified as a variable template name.
Definition: Sema.h:1889
Represents a function declaration or definition.
Definition: Decl.h:1784
DeclaratorChunk::FunctionTypeInfo & getFunctionTypeInfo()
getFunctionTypeInfo - Retrieves the function type info object (looking through parentheses).
Definition: DeclSpec.h:2278
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
PtrTy get() const
Definition: Ownership.h:80
ParseScope - Introduces a new scope for parsing.
Definition: Parser.h:1010
This is a scope that corresponds to the parameters within a function prototype.
Definition: Scope.h:81
void clear()
Reset the contents of this Declarator.
Definition: DeclSpec.h:1927
DeclResult ActOnModuleImport(SourceLocation StartLoc, SourceLocation ExportLoc, SourceLocation ImportLoc, ModuleIdPath Path)
The parser has processed a module import declaration.
Definition: SemaModule.cpp:309
void Initialize()
Perform initialization that occurs after the parser has been initialized but before it parses anythin...
Definition: Sema.cpp:198
void Initialize()
Initialize - Warm up the parser.
Definition: Parser.cpp:445
IdentifierInfo * getIdentifierInfo(StringRef Name) const
Return information about the specified preprocessor identifier token.
Code completion occurs within a class, struct, or union.
Definition: Sema.h:10991
IdentifierInfo * Name
FIXME: Temporarily stores the name of a specialization.
DeclGroupPtrTy ActOnPrivateModuleFragmentDecl(SourceLocation ModuleLoc, SourceLocation PrivateLoc)
The parser has processed a private-module-fragment declaration that begins the definition of the priv...
Definition: SemaModule.cpp:248
virtual Stmt * getBody() const
getBody - If this Decl represents a declaration for a body of code, such as a function or method defi...
Definition: DeclBase.h:986
The name was classified as an ADL-only function template name.
Definition: Sema.h:1893
SourceLocation TemplateNameLoc
TemplateNameLoc - The location of the template name within the source.
Stmt - This represents one statement.
Definition: Stmt.h:66
TemplateNameKind isTemplateName(Scope *S, CXXScopeSpec &SS, bool hasTemplateKeyword, const UnqualifiedId &Name, ParsedType ObjectType, bool EnteringContext, TemplateTy &Template, bool &MemberOfUnknownSpecialization)
bool is(tok::TokenKind K) const
is/isNot - Predicates to check if this token is a specific kind, as in "if (Tok.is(tok::l_brace)) {...
Definition: Token.h:97
The name refers to a dependent template name:
Definition: TemplateKinds.h:46
bool isEmpty() const
No scope specifier.
Definition: DeclSpec.h:189
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:88
bool isCodeCompletionReached() const
Returns true if code-completion is enabled and we have hit the code-completion point.
Defines the C++ template declaration subclasses.
StringRef P
void CodeCompleteNaturalLanguage()
Classification failed; an error has been produced.
Definition: Sema.h:1866
bool TryAnnotateCXXScopeToken(bool EnteringContext=false)
TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only annotates C++ scope specifiers and ...
Definition: Parser.cpp:1993
SourceLocation getCloseLocation() const
This indicates that the scope corresponds to a function, which means that labels are set here...
Definition: Scope.h:47
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1290
bool isFunctionDeclarator(unsigned &idx) const
isFunctionDeclarator - This method returns true if the declarator is a function declarator (looking t...
Definition: DeclSpec.h:2247
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:520
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:113
TemplateNameKind Kind
The kind of template that Template refers to.
Wrapper for void* pointer.
Definition: Ownership.h:50
Parser - This implements a parser for the C family of languages.
Definition: Parser.h:57
TSCS getThreadStorageClassSpec() const
Definition: DeclSpec.h:442
NameClassificationKind getKind() const
Definition: Sema.h:1964
const ParsedAttributes & getAttributes() const
Definition: DeclSpec.h:2419
void * SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS)
Given a C++ nested-name-specifier, produce an annotation value that the parser can use later to recon...
bool isKNRPrototype() const
isKNRPrototype - Return true if this is a K&R style identifier list, like "void foo(a,b,c)".
Definition: DeclSpec.h:1399
bool hadModuleLoaderFatalFailure() const
Definition: Preprocessor.h:928
void ActOnDefaultCtorInitializers(Decl *CDtorDecl)
static const TSCS TSCS_unspecified
Definition: DeclSpec.h:246
Information about one declarator, including the parsed type information and the identifier.
Definition: DeclSpec.h:1775
unsigned getParsedSpecifiers() const
Return a bitmask of which flavors of specifiers this DeclSpec includes.
Definition: DeclSpec.cpp:436
TypeSpecifierType
Specifies the kind of type.
Definition: Specifiers.h:60
static const TST TST_interface
Definition: DeclSpec.h:295
RAIIObject to destroy the contents of a SmallVector of TemplateIdAnnotation pointers and clear the ve...
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:37
Code completion occurs within an Objective-C implementation or category implementation.
Definition: Sema.h:10997
RAII object that makes sure paren/bracket/brace count is correct after declaration/statement parsing...
Decl * ActOnParamDeclarator(Scope *S, Declarator &D)
ActOnParamDeclarator - Called from Parser::ParseFunctionDeclarator() to introduce parameters into fun...
Definition: SemaDecl.cpp:13007
ParsedType getTypeName(const IdentifierInfo &II, SourceLocation NameLoc, Scope *S, CXXScopeSpec *SS=nullptr, bool isClassName=false, bool HasTrailingDot=false, ParsedType ObjectType=nullptr, bool IsCtorOrDtorName=false, bool WantNontrivialTypeSourceInfo=false, bool IsClassTemplateDeductionContext=true, IdentifierInfo **CorrectedII=nullptr)
If the identifier refers to a type name within this scope, return the declaration of that type...
Definition: SemaDecl.cpp:281
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:13703
bool isAnnotation() const
Return true if this is any of tok::annot_* kind tokens.
Definition: Token.h:120
friend class ObjCDeclContextSwitch
Definition: Parser.h:61
The name was classified as a non-type, and an expression representing that name has been formed...
Definition: Sema.h:1885
void MarkAsLateParsedTemplate(FunctionDecl *FD, Decl *FnD, CachedTokens &Toks)
tok::TokenKind getKind() const
Definition: Token.h:92
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:1104
Information about a template-id annotation token.
void CodeCompleteOrdinaryName(Scope *S, ParserCompletionContext CompletionContext)
Decl * ActOnStartOfFunctionDef(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParamLists, SkipBodyInfo *SkipBody=nullptr)
Definition: SemaDecl.cpp:13286
Represents a struct/union/class.
Definition: Decl.h:3662
const Token & NextToken()
NextToken - This peeks ahead one token and returns it without consuming it.
Definition: Parser.h:755
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:456
void SetPoisonReason(IdentifierInfo *II, unsigned DiagID)
Specifies the reason for poisoning an identifier.
One of these records is kept for each identifier that is lexed.
Lookup for the name failed, but we&#39;re assuming it was a template name anyway.
Definition: TemplateKinds.h:50
SourceLocation getTypeSpecTypeLoc() const
Definition: DeclSpec.h:505
Base class for callback objects used by Sema::CorrectTypo to check the validity of a potential typo c...
static const TST TST_class
Definition: DeclSpec.h:296
DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType=nullptr)
Definition: SemaDecl.cpp:54
void ActOnEndOfTranslationUnit()
ActOnEndOfTranslationUnit - This is called at the very end of the translation unit when EOF is reache...
Definition: Sema.cpp:950
Token - This structure provides full information about a lexed token.
Definition: Token.h:34
static const TST TST_enum
Definition: DeclSpec.h:292
void CodeCompletePreprocessorMacroArgument(Scope *S, IdentifierInfo *Macro, MacroInfo *MacroInfo, unsigned Argument)
TemplateName getTemplateName() const
Definition: Sema.h:1981
void setKind(tok::TokenKind K)
Definition: Token.h:93
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.
bool hasTagDefinition() const
Definition: DeclSpec.cpp:427
void ClearStorageClassSpecs()
Definition: DeclSpec.h:455
Describes a module or submodule.
Definition: Module.h:64
The name was classified as a type.
Definition: Sema.h:1870
Code completion occurs at top-level or namespace context.
Definition: Sema.h:10989
static bool HasFlagsSet(Parser::SkipUntilFlags L, Parser::SkipUntilFlags R)
Definition: Parser.cpp:233
The name was classified as a template whose specializations are types.
Definition: Sema.h:1887
bool isObjCAtKeyword(tok::ObjCKeywordKind objcKey) const
Return true if we have an ObjC keyword identifier.
Definition: Lexer.cpp:57
Code completion occurs within the body of a function on a recovery path, where we do not have a speci...
Definition: Sema.h:11021
Represents a C++ unqualified-id that has been parsed.
Definition: DeclSpec.h:944
PtrTy get() const
Definition: Ownership.h:170
StringRef getSpelling(SourceLocation loc, SmallVectorImpl< char > &buffer, bool *invalid=nullptr) const
Return the &#39;spelling&#39; of the token at the given location; does not go up to the spelling location or ...
tok::TokenKind getTokenID() const
If this is a source-language token (e.g.
void SetRangeBegin(SourceLocation Loc)
SetRangeBegin - Set the start of the source range to Loc, unless it&#39;s invalid.
Definition: DeclSpec.h:1906
DeclGroupPtrTy BuildDeclaratorGroup(MutableArrayRef< Decl *> Group)
BuildDeclaratorGroup - convert a list of declarations into a declaration group, performing any necess...
Definition: SemaDecl.cpp:12893
ExprResult getExpression() const
Definition: Sema.h:1966
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:670
void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path)
The name has been typo-corrected to a keyword.
Definition: Sema.h:1868
SourceRange getAnnotationRange() const
SourceRange of the group of tokens that this annotation token represents.
Definition: Token.h:160
ParsedTemplateArgument * getTemplateArgs()
Retrieves a pointer to the template arguments.
MutableArrayRef< TemplateParameterList * > MultiTemplateParamsArg
Definition: Ownership.h:277
IfExistsResult CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, const DeclarationNameInfo &TargetNameInfo)
const ParsingDeclSpec & getDeclSpec() const
void ActOnModuleInclude(SourceLocation DirectiveLoc, Module *Mod)
The parser has processed a module import translated from a #include or similar preprocessing directiv...
Definition: SemaModule.cpp:406
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:40
Decl * ActOnFileScopeAsmDecl(Expr *expr, SourceLocation AsmLoc, SourceLocation RParenLoc)
Definition: SemaDecl.cpp:17605
Represents a C++ nested-name-specifier or a global scope specifier.
Definition: DeclSpec.h:63
void CodeCompleteIncludedFile(llvm::StringRef Dir, bool IsAngled)
void setCodeCompletionHandler(CodeCompletionHandler &Handler)
Set the code completion handler to the given object.
SourceLocation ConsumeAnyToken(bool ConsumeCodeCompletionTok=false)
ConsumeAnyToken - Dispatch to the right Consume* method based on the current token type...
Definition: Parser.h:476
Decl * ActOnFinishFunctionBody(Decl *Decl, Stmt *Body)
Definition: SemaDecl.cpp:13731
SourceRange getSourceRange() const LLVM_READONLY
Definition: DeclSpec.h:497
IdentifierInfo * getIdentifier() const
Definition: DeclSpec.h:2137
SourceLocation TemplateKWLoc
TemplateKWLoc - The location of the template keyword.
SourceLocation LAngleLoc
The location of the &#39;<&#39; before the template argument list.
An error occurred.
Definition: Sema.h:4869
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:331
A little helper class used to produce diagnostics.
Definition: Diagnostic.h:1043
A class for parsing a declarator.
void clearCodeCompletionHandler()
Clear out the code completion handler.
The name was classified as a function template name.
Definition: Sema.h:1891
unsigned NumParams
NumParams - This is the number of formal parameters specified by the declarator.
Definition: DeclSpec.h:1298
Stop at code completion.
Definition: Parser.h:1087
SourceRange getRange() const
Definition: DeclSpec.h:68
void setAnnotationRange(SourceRange R)
Definition: Token.h:163
TST getTypeSpecType() const
Definition: DeclSpec.h:473
static bool isDeclRep(TST T)
Definition: DeclSpec.h:420
void setAnnotationValue(void *val)
Definition: Token.h:230
bool isCodeCompletionEnabled() const
Determine if we are performing code completion.
void CodeCompleteObjCMethodDecl(Scope *S, Optional< bool > IsInstanceMethod, ParsedType ReturnType)
Decl * ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS, RecordDecl *&AnonRecord)
ParsedFreeStandingDeclSpec - This method is invoked when a declspec with no declarator (e...
Definition: SemaDecl.cpp:4303
ModuleDeclKind
Definition: Sema.h:2330
int Id
Definition: ASTDiff.cpp:190
void AnnotateCachedTokens(const Token &Tok)
We notify the Preprocessor that if it is caching tokens (because backtrack is enabled) it should repl...
const FileEntry * getFileEntryForID(FileID FID) const
Returns the FileEntry record for the provided FileID.
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:1922
bool ParseUnqualifiedId(CXXScopeSpec &SS, bool EnteringContext, bool AllowDestructorName, bool AllowConstructorName, bool AllowDeductionGuide, ParsedType ObjectType, SourceLocation *TemplateKWLoc, UnqualifiedId &Result)
Parse a C++ unqualified-id (or a C identifier), which describes the name of an entity.
The name was classified as a specific non-type, non-template declaration.
Definition: Sema.h:1874
void RevertCachedTokens(unsigned N)
When backtracking is enabled and tokens are cached, this allows to revert a specific number of tokens...
SourceLocation getThreadStorageClassSpecLoc() const
Definition: DeclSpec.h:451
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:126
SourceLocation getBeginLoc() const
Definition: DeclSpec.h:72
Decl * ActOnEmptyDeclaration(Scope *S, const ParsedAttributesView &AttrList, SourceLocation SemiLoc)
Handle a C++11 empty-declaration and attribute-declaration.
Represents a C++ template name within the type system.
Definition: TemplateName.h:187
This is a compound statement scope.
Definition: Scope.h:130
void CodeCompletePreprocessorExpression()
SourceLocation getStorageClassSpecLoc() const
Definition: DeclSpec.h:450
const char * getPunctuatorSpelling(TokenKind Kind) LLVM_READNONE
Determines the spelling of simple punctuation tokens like &#39;!&#39; or &#39;&#39;, and returns NULL for literal and...
Definition: TokenKinds.cpp:31
NamedDecl * getNonTypeDecl() const
Definition: Sema.h:1976
TemplateNameKind
Specifies the kind of template name that an identifier refers to.
Definition: TemplateKinds.h:20
static const TST TST_int
Definition: DeclSpec.h:279
void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc)
bool isInvalid() const
Definition: Ownership.h:166
SourceLocation getEnd() const
Wraps an identifier and optional source location for the identifier.
Definition: ParsedAttr.h:95
The symbol exists.
Definition: Sema.h:4859
bool isUsable() const
Definition: Ownership.h:167
The result type of a method or function.
const LangOptions & getLangOpts() const
Definition: Parser.h:403
This is a scope that corresponds to the parameters within a function prototype for a function declara...
Definition: Scope.h:87
SourceManager & getSourceManager() const
Definition: Preprocessor.h:908
NameClassification ClassifyName(Scope *S, CXXScopeSpec &SS, IdentifierInfo *&Name, SourceLocation NameLoc, const Token &NextToken, 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:848
void CheckForFunctionRedefinition(FunctionDecl *FD, const FunctionDecl *EffectiveDefinition=nullptr, SkipBodyInfo *SkipBody=nullptr)
Definition: SemaDecl.cpp:13356
Decl * ActOnSkippedFunctionBody(Decl *Decl)
Definition: SemaDecl.cpp:13721
A class for parsing a DeclSpec.
void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, SourceLocation LocAfterDecls)
Definition: SemaDecl.cpp:13249
#define false
Definition: stdbool.h:17
Kind
Stop skipping at semicolon.
Definition: Parser.h:1084
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:153
void TypoCorrectToken(const Token &Tok)
Update the current token to represent the provided identifier, in order to cache an action performed ...
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:218
SCS getStorageClassSpec() const
Definition: DeclSpec.h:441
bool ParseTopLevelDecl()
Definition: Parser.h:438
ASTContext & getASTContext() const
Definition: Sema.h:1295
Encodes a location in the source.
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
void setCurrentOpenCLExtensionForDecl(Decl *FD)
Set current OpenCL extensions for a declaration which can only be used when these OpenCL extensions a...
Definition: Sema.cpp:2211
bool TryAnnotateTypeOrScopeToken()
TryAnnotateTypeOrScopeToken - If the current token position is on a typename (possibly qualified in C...
Definition: Parser.cpp:1764
void ExitScope()
ExitScope - Pop a scope off the scope stack.
Definition: Parser.cpp:377
static const TST TST_union
Definition: DeclSpec.h:293
IdentifierInfo * getIdentifierInfo() const
Definition: Token.h:179
Parser(Preprocessor &PP, Sema &Actions, bool SkipFunctionBodies)
Definition: Parser.cpp:50
void setAnnotationEndLoc(SourceLocation L)
Definition: Token.h:144
IdentifierTable & getIdentifierTable()
Definition: Preprocessor.h:911
ParsedAttr - Represents a syntactic attribute.
Definition: ParsedAttr.h:117
ParsedType getType() const
Definition: Sema.h:1971
void setIdentifierInfo(IdentifierInfo *II)
Definition: Token.h:188
ExtensionRAIIObject - This saves the state of extension warnings when constructed and disables them...
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:13679
void CodeCompletePreprocessorDirective(bool InConditional)
void Lex(Token &Result)
Lex the next token for this preprocessor.
TemplateNameKind getTemplateNameKind() const
Definition: Sema.h:1987
void EnterScope(unsigned ScopeFlags)
EnterScope - Start a new scope.
Definition: Parser.cpp:366
This name is not a type or template in this context, but might be something else. ...
Definition: Sema.h:1864
DeclGroupPtrTy ActOnGlobalModuleFragmentDecl(SourceLocation ModuleLoc)
The parser has processed a global-module-fragment declaration that begins the definition of the globa...
Definition: SemaModule.cpp:60
bool isAtStartOfLine() const
isAtStartOfLine - Return true if this token is at the start of a line.
Definition: Token.h:268
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:24
bool isObjCObjectPointerType() const
Definition: Type.h:6495
static bool IsCommonTypo(tok::TokenKind ExpectedTok, const Token &Tok)
Definition: Parser.cpp:101
void SetLateTemplateParser(LateTemplateParserCB *LTP, LateTemplateParserCleanupCB *LTPCleanup, void *P)
Definition: Sema.h:708
void EnterToken(const Token &Tok, bool IsReinject)
Enters a token in the token stream to be lexed next.
Scope * getCurScope() const
Definition: Parser.h:410
The name is a dependent name, so the results will differ from one instantiation to the next...
Definition: Sema.h:4866
void Init(Scope *parent, unsigned flags)
Init - This is used by the parser to implement scope caching.
Definition: Scope.cpp:87
void ActOnStartOfTranslationUnit()
This is called before the very first declaration in the translation unit is parsed.
Definition: Sema.cpp:867
ASTConsumer & getASTConsumer() const
Definition: Sema.h:1296
bool isInvalid() const
An error occurred during parsing of the scope specifier.
Definition: DeclSpec.h:194
void CodeCompletePreprocessorMacroName(bool IsDefinition)
void setFunctionDefinitionKind(FunctionDefinitionKind Val)
Definition: DeclSpec.h:2468
Describes a module import declaration, which makes the contents of the named module visible in the cu...
Definition: Decl.h:4245
The scope of a struct/union/class definition.
Definition: Scope.h:65
bool isNot(tok::TokenKind K) const
Definition: Token.h:98
bool isBacktrackEnabled() const
True if EnableBacktrackAtThisPos() was called and caching of tokens is on.
Dataflow Directional Tag Classes.
bool isValid() const
Return true if this is a valid SourceLocation object.
&#39;export module X;&#39;
bool expectAndConsume(unsigned DiagID=diag::err_expected, const char *Msg="", tok::TokenKind SkipToTok=tok::unknown)
Definition: Parser.cpp:2456
const Scope * getParent() const
getParent - Return the scope that this is nested in.
Definition: Scope.h:228
void addCommentHandler(CommentHandler *Handler)
Add the specified comment handler to the preprocessor.
SourceLocation RAngleLoc
The location of the &#39;>&#39; after the template argument list.
void ActOnModuleBegin(SourceLocation DirectiveLoc, Module *Mod)
The parsed has entered a submodule.
Definition: SemaModule.cpp:440
static FixItHint CreateRemoval(CharSourceRange RemoveRange)
Create a code modification hint that removes the given source range.
Definition: Diagnostic.h:118
bool isOneOf(tok::TokenKind K1, tok::TokenKind K2) const
Definition: Token.h:99
SkipUntilFlags
Control flags for SkipUntil functions.
Definition: Parser.h:1083
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".
ExternalASTSource * getExternalSource() const
Retrieve a pointer to the external AST source associated with this AST context, if any...
Definition: ASTContext.h:1085
The name refers to a template whose specialization produces a type.
Definition: TemplateKinds.h:30
static const TST TST_unspecified
Definition: DeclSpec.h:272
Encapsulates the data about a macro definition (e.g.
Definition: MacroInfo.h:39
~Parser() override
Definition: Parser.cpp:416
void takeAttributesFrom(ParsedAttributes &attrs)
Definition: DeclSpec.h:775
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Definition: Parser.cpp:72
The name was classified as an ADL-only function name.
Definition: Sema.h:1878
DeclGroupPtrTy ActOnModuleDecl(SourceLocation StartLoc, SourceLocation ModuleLoc, ModuleDeclKind MDK, ModuleIdPath Path, bool IsFirstDecl)
The parser has processed a module-declaration that begins the definition of a module interface or imp...
Definition: SemaModule.cpp:93
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:92
SmallVector< TemplateParameterList *, 4 > TemplateParameterLists
Definition: Parser.h:422
This is a scope that can contain a declaration.
Definition: Scope.h:59
bool isObjCObjectType() const
Definition: Type.h:6499
bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, unsigned &DiagID, const PrintingPolicy &Policy)
Definition: DeclSpec.cpp:787
NamedDecl * HandleDeclarator(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParameterLists)
Definition: SemaDecl.cpp:5536
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:2143
void ActOnTranslationUnitScope(Scope *S)
Definition: Sema.cpp:72
bool isSet() const
Deprecated.
Definition: DeclSpec.h:209
ParsingDeclSpec & getMutableDeclSpec() const
Captures information about "declaration specifiers".
Definition: DeclSpec.h:228
SourceLocation ConsumeToken()
ConsumeToken - Consume the current &#39;peek token&#39; and lex the next one.
Definition: Parser.h:448
SourceLocation getLastLoc() const
Definition: Token.h:149
bool isNotEmpty() const
A scope specifier is present, but may be valid or invalid.
Definition: DeclSpec.h:191
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:389
void ActOnPopScope(SourceLocation Loc, Scope *S)
Scope actions.
Definition: SemaDecl.cpp:1881
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:129
void revertTokenIDToIdentifier()
Revert TokenID to tok::identifier; used for GNU libstdc++ 4.2 compatibility.
bool isIncrementalProcessingEnabled() const
Returns true if incremental processing is enabled.
ExprResult ExprError()
Definition: Ownership.h:279
bool TryAnnotateTypeOrScopeTokenAfterScopeSpec(CXXScopeSpec &SS, bool IsNewScope)
Try to annotate a type or scope token, having already parsed an optional scope specifier.
Definition: Parser.cpp:1879
static Decl::Kind getKind(const Decl *D)
Definition: DeclBase.cpp:945
void ActOnComment(SourceRange Comment)
Definition: Sema.cpp:1877
Abstract base class that describes a handler that will receive source ranges for each of the comments...
static OpaquePtr make(TemplateName P)
Definition: Ownership.h:60
bool isEmpty() const
isEmpty - Return true if this declaration specifier is completely empty: no tokens were parsed in the...
Definition: DeclSpec.h:625
virtual bool HandleTopLevelDecl(DeclGroupRef D)
HandleTopLevelDecl - Handle the specified top-level declaration.
Definition: ASTConsumer.cpp:18
static const TST TST_struct
Definition: DeclSpec.h:294
void setLocation(SourceLocation L)
Definition: Token.h:134
void ActOnModuleEnd(SourceLocation DirectiveLoc, Module *Mod)
The parser has left a submodule.
Definition: SemaModule.cpp:464
#define true
Definition: stdbool.h:16
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:1033
bool isTranslationUnit() const
Definition: DeclBase.h:1854
bool isEditorPlaceholder() const
Returns true if this token is an editor placeholder.
Definition: Token.h:310
unsigned NumArgs
NumArgs - The number of template arguments.
void * getAnnotationValue() const
Definition: Token.h:226
SourceLocation getBegin() const
SourceLocation ColonLoc
Location of &#39;:&#39;.
Definition: OpenMPClause.h:107
void setCommaLoc(SourceLocation CL)
Definition: DeclSpec.h:2462
The symbol does not exist.
Definition: Sema.h:4862
void CodeCompleteInPreprocessorConditionalExclusion(Scope *S)
ParamInfo * Params
Params - This is a pointer to a new[]&#39;d array of ParamInfo objects that describe the parameters speci...
Definition: DeclSpec.h:1323
ParsedAttributes & getAttributes()
Definition: DeclSpec.h:772
void startToken()
Reset all flags to cleared.
Definition: Token.h:171
ParsedTemplateTy Template
The declaration of the template corresponding to the template-name.
bool ParseFirstTopLevelDecl(DeclGroupPtrTy &Result)
Parse the first top-level declaration in a translation unit.
Definition: Parser.cpp:553
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Definition: Preprocessor.h:125
Stop skipping at specified token, but don&#39;t skip the token itself.
Definition: Parser.h:1086