clang  15.0.0git
Parser.cpp
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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"
20 #include "clang/Sema/DeclSpec.h"
22 #include "clang/Sema/Scope.h"
23 #include "llvm/Support/Path.h"
24 using namespace clang;
25 
26 
27 namespace {
28 /// A comment handler that passes comments found by the preprocessor
29 /// to the parser action.
30 class ActionCommentHandler : public CommentHandler {
31  Sema &S;
32 
33 public:
34  explicit ActionCommentHandler(Sema &S) : S(S) { }
35 
36  bool HandleComment(Preprocessor &PP, SourceRange Comment) override {
37  S.ActOnComment(Comment);
38  return false;
39  }
40 };
41 } // end anonymous namespace
42 
43 IdentifierInfo *Parser::getSEHExceptKeyword() {
44  // __except is accepted as a (contextual) keyword
45  if (!Ident__except && (getLangOpts().MicrosoftExt || getLangOpts().Borland))
46  Ident__except = PP.getIdentifierInfo("__except");
47 
48  return Ident__except;
49 }
50 
51 Parser::Parser(Preprocessor &pp, Sema &actions, bool skipFunctionBodies)
52  : PP(pp), PreferredType(pp.isCodeCompletionEnabled()), Actions(actions),
53  Diags(PP.getDiagnostics()), GreaterThanIsOperator(true),
54  ColonIsSacred(false), InMessageExpression(false),
55  TemplateParameterDepth(0), ParsingInObjCContainer(false) {
56  SkipFunctionBodies = pp.isCodeCompletionEnabled() || skipFunctionBodies;
57  Tok.startToken();
58  Tok.setKind(tok::eof);
59  Actions.CurScope = nullptr;
60  NumCachedScopes = 0;
61  CurParsedObjCImpl = nullptr;
62 
63  // Add #pragma handlers. These are removed and destroyed in the
64  // destructor.
65  initializePragmaHandlers();
66 
67  CommentSemaHandler.reset(new ActionCommentHandler(actions));
68  PP.addCommentHandler(CommentSemaHandler.get());
69 
70  PP.setCodeCompletionHandler(*this);
71 }
72 
74  return Diags.Report(Loc, DiagID);
75 }
76 
77 DiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) {
78  return Diag(Tok.getLocation(), DiagID);
79 }
80 
81 /// Emits a diagnostic suggesting parentheses surrounding a
82 /// given range.
83 ///
84 /// \param Loc The location where we'll emit the diagnostic.
85 /// \param DK The kind of diagnostic to emit.
86 /// \param ParenRange Source range enclosing code that should be parenthesized.
87 void Parser::SuggestParentheses(SourceLocation Loc, unsigned DK,
88  SourceRange ParenRange) {
89  SourceLocation EndLoc = PP.getLocForEndOfToken(ParenRange.getEnd());
90  if (!ParenRange.getEnd().isFileID() || EndLoc.isInvalid()) {
91  // We can't display the parentheses, so just dig the
92  // warning/error and return.
93  Diag(Loc, DK);
94  return;
95  }
96 
97  Diag(Loc, DK)
98  << FixItHint::CreateInsertion(ParenRange.getBegin(), "(")
99  << FixItHint::CreateInsertion(EndLoc, ")");
100 }
101 
102 static bool IsCommonTypo(tok::TokenKind ExpectedTok, const Token &Tok) {
103  switch (ExpectedTok) {
104  case tok::semi:
105  return Tok.is(tok::colon) || Tok.is(tok::comma); // : or , for ;
106  default: return false;
107  }
108 }
109 
110 bool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID,
111  StringRef Msg) {
112  if (Tok.is(ExpectedTok) || Tok.is(tok::code_completion)) {
113  ConsumeAnyToken();
114  return false;
115  }
116 
117  // Detect common single-character typos and resume.
118  if (IsCommonTypo(ExpectedTok, Tok)) {
119  SourceLocation Loc = Tok.getLocation();
120  {
121  DiagnosticBuilder DB = Diag(Loc, DiagID);
123  SourceRange(Loc), tok::getPunctuatorSpelling(ExpectedTok));
124  if (DiagID == diag::err_expected)
125  DB << ExpectedTok;
126  else if (DiagID == diag::err_expected_after)
127  DB << Msg << ExpectedTok;
128  else
129  DB << Msg;
130  }
131 
132  // Pretend there wasn't a problem.
133  ConsumeAnyToken();
134  return false;
135  }
136 
137  SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation);
138  const char *Spelling = nullptr;
139  if (EndLoc.isValid())
140  Spelling = tok::getPunctuatorSpelling(ExpectedTok);
141 
142  DiagnosticBuilder DB =
143  Spelling
144  ? Diag(EndLoc, DiagID) << FixItHint::CreateInsertion(EndLoc, Spelling)
145  : Diag(Tok, DiagID);
146  if (DiagID == diag::err_expected)
147  DB << ExpectedTok;
148  else if (DiagID == diag::err_expected_after)
149  DB << Msg << ExpectedTok;
150  else
151  DB << Msg;
152 
153  return true;
154 }
155 
156 bool Parser::ExpectAndConsumeSemi(unsigned DiagID) {
157  if (TryConsumeToken(tok::semi))
158  return false;
159 
160  if (Tok.is(tok::code_completion)) {
161  handleUnexpectedCodeCompletionToken();
162  return false;
163  }
164 
165  if ((Tok.is(tok::r_paren) || Tok.is(tok::r_square)) &&
166  NextToken().is(tok::semi)) {
167  Diag(Tok, diag::err_extraneous_token_before_semi)
168  << PP.getSpelling(Tok)
170  ConsumeAnyToken(); // The ')' or ']'.
171  ConsumeToken(); // The ';'.
172  return false;
173  }
174 
175  return ExpectAndConsume(tok::semi, DiagID);
176 }
177 
178 void Parser::ConsumeExtraSemi(ExtraSemiKind Kind, DeclSpec::TST TST) {
179  if (!Tok.is(tok::semi)) return;
180 
181  bool HadMultipleSemis = false;
182  SourceLocation StartLoc = Tok.getLocation();
183  SourceLocation EndLoc = Tok.getLocation();
184  ConsumeToken();
185 
186  while ((Tok.is(tok::semi) && !Tok.isAtStartOfLine())) {
187  HadMultipleSemis = true;
188  EndLoc = Tok.getLocation();
189  ConsumeToken();
190  }
191 
192  // C++11 allows extra semicolons at namespace scope, but not in any of the
193  // other contexts.
194  if (Kind == OutsideFunction && getLangOpts().CPlusPlus) {
195  if (getLangOpts().CPlusPlus11)
196  Diag(StartLoc, diag::warn_cxx98_compat_top_level_semi)
197  << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
198  else
199  Diag(StartLoc, diag::ext_extra_semi_cxx11)
200  << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
201  return;
202  }
203 
204  if (Kind != AfterMemberFunctionDefinition || HadMultipleSemis)
205  Diag(StartLoc, diag::ext_extra_semi)
207  Actions.getASTContext().getPrintingPolicy())
208  << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
209  else
210  // A single semicolon is valid after a member function definition.
211  Diag(StartLoc, diag::warn_extra_semi_after_mem_fn_def)
212  << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
213 }
214 
215 bool Parser::expectIdentifier() {
216  if (Tok.is(tok::identifier))
217  return false;
218  if (const auto *II = Tok.getIdentifierInfo()) {
219  if (II->isCPlusPlusKeyword(getLangOpts())) {
220  Diag(Tok, diag::err_expected_token_instead_of_objcxx_keyword)
221  << tok::identifier << Tok.getIdentifierInfo();
222  // Objective-C++: Recover by treating this keyword as a valid identifier.
223  return false;
224  }
225  }
226  Diag(Tok, diag::err_expected) << tok::identifier;
227  return true;
228 }
229 
230 void Parser::checkCompoundToken(SourceLocation FirstTokLoc,
231  tok::TokenKind FirstTokKind, CompoundToken Op) {
232  if (FirstTokLoc.isInvalid())
233  return;
234  SourceLocation SecondTokLoc = Tok.getLocation();
235 
236  // If either token is in a macro, we expect both tokens to come from the same
237  // macro expansion.
238  if ((FirstTokLoc.isMacroID() || SecondTokLoc.isMacroID()) &&
239  PP.getSourceManager().getFileID(FirstTokLoc) !=
240  PP.getSourceManager().getFileID(SecondTokLoc)) {
241  Diag(FirstTokLoc, diag::warn_compound_token_split_by_macro)
242  << (FirstTokKind == Tok.getKind()) << FirstTokKind << Tok.getKind()
243  << static_cast<int>(Op) << SourceRange(FirstTokLoc);
244  Diag(SecondTokLoc, diag::note_compound_token_split_second_token_here)
245  << (FirstTokKind == Tok.getKind()) << Tok.getKind()
246  << SourceRange(SecondTokLoc);
247  return;
248  }
249 
250  // We expect the tokens to abut.
251  if (Tok.hasLeadingSpace() || Tok.isAtStartOfLine()) {
252  SourceLocation SpaceLoc = PP.getLocForEndOfToken(FirstTokLoc);
253  if (SpaceLoc.isInvalid())
254  SpaceLoc = FirstTokLoc;
255  Diag(SpaceLoc, diag::warn_compound_token_split_by_whitespace)
256  << (FirstTokKind == Tok.getKind()) << FirstTokKind << Tok.getKind()
257  << static_cast<int>(Op) << SourceRange(FirstTokLoc, SecondTokLoc);
258  return;
259  }
260 }
261 
262 //===----------------------------------------------------------------------===//
263 // Error recovery.
264 //===----------------------------------------------------------------------===//
265 
267  return (static_cast<unsigned>(L) & static_cast<unsigned>(R)) != 0;
268 }
269 
270 /// SkipUntil - Read tokens until we get to the specified token, then consume
271 /// it (unless no flag StopBeforeMatch). Because we cannot guarantee that the
272 /// token will ever occur, this skips to the next token, or to some likely
273 /// good stopping point. If StopAtSemi is true, skipping will stop at a ';'
274 /// character.
275 ///
276 /// If SkipUntil finds the specified token, it returns true, otherwise it
277 /// returns false.
279  // We always want this function to skip at least one token if the first token
280  // isn't T and if not at EOF.
281  bool isFirstTokenSkipped = true;
282  while (true) {
283  // If we found one of the tokens, stop and return true.
284  for (unsigned i = 0, NumToks = Toks.size(); i != NumToks; ++i) {
285  if (Tok.is(Toks[i])) {
286  if (HasFlagsSet(Flags, StopBeforeMatch)) {
287  // Noop, don't consume the token.
288  } else {
289  ConsumeAnyToken();
290  }
291  return true;
292  }
293  }
294 
295  // Important special case: The caller has given up and just wants us to
296  // skip the rest of the file. Do this without recursing, since we can
297  // get here precisely because the caller detected too much recursion.
298  if (Toks.size() == 1 && Toks[0] == tok::eof &&
299  !HasFlagsSet(Flags, StopAtSemi) &&
301  while (Tok.isNot(tok::eof))
302  ConsumeAnyToken();
303  return true;
304  }
305 
306  switch (Tok.getKind()) {
307  case tok::eof:
308  // Ran out of tokens.
309  return false;
310 
311  case tok::annot_pragma_openmp:
312  case tok::annot_attr_openmp:
313  case tok::annot_pragma_openmp_end:
314  // Stop before an OpenMP pragma boundary.
315  if (OpenMPDirectiveParsing)
316  return false;
317  ConsumeAnnotationToken();
318  break;
319  case tok::annot_module_begin:
320  case tok::annot_module_end:
321  case tok::annot_module_include:
322  // Stop before we change submodules. They generally indicate a "good"
323  // place to pick up parsing again (except in the special case where
324  // we're trying to skip to EOF).
325  return false;
326 
327  case tok::code_completion:
328  if (!HasFlagsSet(Flags, StopAtCodeCompletion))
329  handleUnexpectedCodeCompletionToken();
330  return false;
331 
332  case tok::l_paren:
333  // Recursively skip properly-nested parens.
334  ConsumeParen();
335  if (HasFlagsSet(Flags, StopAtCodeCompletion))
336  SkipUntil(tok::r_paren, StopAtCodeCompletion);
337  else
338  SkipUntil(tok::r_paren);
339  break;
340  case tok::l_square:
341  // Recursively skip properly-nested square brackets.
342  ConsumeBracket();
343  if (HasFlagsSet(Flags, StopAtCodeCompletion))
344  SkipUntil(tok::r_square, StopAtCodeCompletion);
345  else
346  SkipUntil(tok::r_square);
347  break;
348  case tok::l_brace:
349  // Recursively skip properly-nested braces.
350  ConsumeBrace();
351  if (HasFlagsSet(Flags, StopAtCodeCompletion))
352  SkipUntil(tok::r_brace, StopAtCodeCompletion);
353  else
354  SkipUntil(tok::r_brace);
355  break;
356  case tok::question:
357  // Recursively skip ? ... : pairs; these function as brackets. But
358  // still stop at a semicolon if requested.
359  ConsumeToken();
360  SkipUntil(tok::colon,
361  SkipUntilFlags(unsigned(Flags) &
362  unsigned(StopAtCodeCompletion | StopAtSemi)));
363  break;
364 
365  // Okay, we found a ']' or '}' or ')', which we think should be balanced.
366  // Since the user wasn't looking for this token (if they were, it would
367  // already be handled), this isn't balanced. If there is a LHS token at a
368  // higher level, we will assume that this matches the unbalanced token
369  // and return it. Otherwise, this is a spurious RHS token, which we skip.
370  case tok::r_paren:
371  if (ParenCount && !isFirstTokenSkipped)
372  return false; // Matches something.
373  ConsumeParen();
374  break;
375  case tok::r_square:
376  if (BracketCount && !isFirstTokenSkipped)
377  return false; // Matches something.
378  ConsumeBracket();
379  break;
380  case tok::r_brace:
381  if (BraceCount && !isFirstTokenSkipped)
382  return false; // Matches something.
383  ConsumeBrace();
384  break;
385 
386  case tok::semi:
387  if (HasFlagsSet(Flags, StopAtSemi))
388  return false;
389  LLVM_FALLTHROUGH;
390  default:
391  // Skip this token.
392  ConsumeAnyToken();
393  break;
394  }
395  isFirstTokenSkipped = false;
396  }
397 }
398 
399 //===----------------------------------------------------------------------===//
400 // Scope manipulation
401 //===----------------------------------------------------------------------===//
402 
403 /// EnterScope - Start a new scope.
404 void Parser::EnterScope(unsigned ScopeFlags) {
405  if (NumCachedScopes) {
406  Scope *N = ScopeCache[--NumCachedScopes];
407  N->Init(getCurScope(), ScopeFlags);
408  Actions.CurScope = N;
409  } else {
410  Actions.CurScope = new Scope(getCurScope(), ScopeFlags, Diags);
411  }
412 }
413 
414 /// ExitScope - Pop a scope off the scope stack.
416  assert(getCurScope() && "Scope imbalance!");
417 
418  // Inform the actions module that this scope is going away if there are any
419  // decls in it.
420  Actions.ActOnPopScope(Tok.getLocation(), getCurScope());
421 
422  Scope *OldScope = getCurScope();
423  Actions.CurScope = OldScope->getParent();
424 
425  if (NumCachedScopes == ScopeCacheSize)
426  delete OldScope;
427  else
428  ScopeCache[NumCachedScopes++] = OldScope;
429 }
430 
431 /// Set the flags for the current scope to ScopeFlags. If ManageFlags is false,
432 /// this object does nothing.
433 Parser::ParseScopeFlags::ParseScopeFlags(Parser *Self, unsigned ScopeFlags,
434  bool ManageFlags)
435  : CurScope(ManageFlags ? Self->getCurScope() : nullptr) {
436  if (CurScope) {
437  OldFlags = CurScope->getFlags();
438  CurScope->setFlags(ScopeFlags);
439  }
440 }
441 
442 /// Restore the flags for the current scope to what they were before this
443 /// object overrode them.
444 Parser::ParseScopeFlags::~ParseScopeFlags() {
445  if (CurScope)
446  CurScope->setFlags(OldFlags);
447 }
448 
449 
450 //===----------------------------------------------------------------------===//
451 // C99 6.9: External Definitions.
452 //===----------------------------------------------------------------------===//
453 
455  // If we still have scopes active, delete the scope tree.
456  delete getCurScope();
457  Actions.CurScope = nullptr;
458 
459  // Free the scope cache.
460  for (unsigned i = 0, e = NumCachedScopes; i != e; ++i)
461  delete ScopeCache[i];
462 
463  resetPragmaHandlers();
464 
465  PP.removeCommentHandler(CommentSemaHandler.get());
466 
468 
469  DestroyTemplateIds();
470 }
471 
472 /// Initialize - Warm up the parser.
473 ///
475  // Create the translation unit scope. Install it as the current scope.
476  assert(getCurScope() == nullptr && "A scope is already active?");
479 
480  // Initialization for Objective-C context sensitive keywords recognition.
481  // Referenced in Parser::ParseObjCTypeQualifierList.
482  if (getLangOpts().ObjC) {
483  ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in");
484  ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out");
485  ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout");
486  ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway");
487  ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy");
488  ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref");
489  ObjCTypeQuals[objc_nonnull] = &PP.getIdentifierTable().get("nonnull");
490  ObjCTypeQuals[objc_nullable] = &PP.getIdentifierTable().get("nullable");
491  ObjCTypeQuals[objc_null_unspecified]
492  = &PP.getIdentifierTable().get("null_unspecified");
493  }
494 
495  Ident_instancetype = nullptr;
496  Ident_final = nullptr;
497  Ident_sealed = nullptr;
498  Ident_abstract = nullptr;
499  Ident_override = nullptr;
500  Ident_GNU_final = nullptr;
501  Ident_import = nullptr;
502  Ident_module = nullptr;
503 
504  Ident_super = &PP.getIdentifierTable().get("super");
505 
506  Ident_vector = nullptr;
507  Ident_bool = nullptr;
508  Ident_Bool = nullptr;
509  Ident_pixel = nullptr;
510  if (getLangOpts().AltiVec || getLangOpts().ZVector) {
511  Ident_vector = &PP.getIdentifierTable().get("vector");
512  Ident_bool = &PP.getIdentifierTable().get("bool");
513  Ident_Bool = &PP.getIdentifierTable().get("_Bool");
514  }
515  if (getLangOpts().AltiVec)
516  Ident_pixel = &PP.getIdentifierTable().get("pixel");
517 
518  Ident_introduced = nullptr;
519  Ident_deprecated = nullptr;
520  Ident_obsoleted = nullptr;
521  Ident_unavailable = nullptr;
522  Ident_strict = nullptr;
523  Ident_replacement = nullptr;
524 
525  Ident_language = Ident_defined_in = Ident_generated_declaration = nullptr;
526 
527  Ident__except = nullptr;
528 
529  Ident__exception_code = Ident__exception_info = nullptr;
530  Ident__abnormal_termination = Ident___exception_code = nullptr;
531  Ident___exception_info = Ident___abnormal_termination = nullptr;
532  Ident_GetExceptionCode = Ident_GetExceptionInfo = nullptr;
533  Ident_AbnormalTermination = nullptr;
534 
535  if(getLangOpts().Borland) {
536  Ident__exception_info = PP.getIdentifierInfo("_exception_info");
537  Ident___exception_info = PP.getIdentifierInfo("__exception_info");
538  Ident_GetExceptionInfo = PP.getIdentifierInfo("GetExceptionInformation");
539  Ident__exception_code = PP.getIdentifierInfo("_exception_code");
540  Ident___exception_code = PP.getIdentifierInfo("__exception_code");
541  Ident_GetExceptionCode = PP.getIdentifierInfo("GetExceptionCode");
542  Ident__abnormal_termination = PP.getIdentifierInfo("_abnormal_termination");
543  Ident___abnormal_termination = PP.getIdentifierInfo("__abnormal_termination");
544  Ident_AbnormalTermination = PP.getIdentifierInfo("AbnormalTermination");
545 
546  PP.SetPoisonReason(Ident__exception_code,diag::err_seh___except_block);
547  PP.SetPoisonReason(Ident___exception_code,diag::err_seh___except_block);
548  PP.SetPoisonReason(Ident_GetExceptionCode,diag::err_seh___except_block);
549  PP.SetPoisonReason(Ident__exception_info,diag::err_seh___except_filter);
550  PP.SetPoisonReason(Ident___exception_info,diag::err_seh___except_filter);
551  PP.SetPoisonReason(Ident_GetExceptionInfo,diag::err_seh___except_filter);
552  PP.SetPoisonReason(Ident__abnormal_termination,diag::err_seh___finally_block);
553  PP.SetPoisonReason(Ident___abnormal_termination,diag::err_seh___finally_block);
554  PP.SetPoisonReason(Ident_AbnormalTermination,diag::err_seh___finally_block);
555  }
556 
557  if (getLangOpts().CPlusPlusModules) {
558  Ident_import = PP.getIdentifierInfo("import");
559  Ident_module = PP.getIdentifierInfo("module");
560  }
561 
562  Actions.Initialize();
563 
564  // Prime the lexer look-ahead.
565  ConsumeToken();
566 }
567 
568 void Parser::DestroyTemplateIds() {
569  for (TemplateIdAnnotation *Id : TemplateIds)
570  Id->Destroy();
571  TemplateIds.clear();
572 }
573 
574 /// Parse the first top-level declaration in a translation unit.
575 ///
576 /// translation-unit:
577 /// [C] external-declaration
578 /// [C] translation-unit external-declaration
579 /// [C++] top-level-declaration-seq[opt]
580 /// [C++20] global-module-fragment[opt] module-declaration
581 /// top-level-declaration-seq[opt] private-module-fragment[opt]
582 ///
583 /// Note that in C, it is an error if there is no first declaration.
585  Sema::ModuleImportState &ImportState) {
586  Actions.ActOnStartOfTranslationUnit();
587 
588  // For C++20 modules, a module decl must be the first in the TU. We also
589  // need to track module imports.
591  bool NoTopLevelDecls = ParseTopLevelDecl(Result, ImportState);
592 
593  // C11 6.9p1 says translation units must have at least one top-level
594  // declaration. C++ doesn't have this restriction. We also don't want to
595  // complain if we have a precompiled header, although technically if the PCH
596  // is empty we should still emit the (pedantic) diagnostic.
597  // If the main file is a header, we're only pretending it's a TU; don't warn.
598  if (NoTopLevelDecls && !Actions.getASTContext().getExternalSource() &&
600  Diag(diag::ext_empty_translation_unit);
601 
602  return NoTopLevelDecls;
603 }
604 
605 /// ParseTopLevelDecl - Parse one top-level declaration, return whatever the
606 /// action tells us to. This returns true if the EOF was encountered.
607 ///
608 /// top-level-declaration:
609 /// declaration
610 /// [C++20] module-import-declaration
612  Sema::ModuleImportState &ImportState) {
613  DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(*this);
614 
615  // Skip over the EOF token, flagging end of previous input for incremental
616  // processing
617  if (PP.isIncrementalProcessingEnabled() && Tok.is(tok::eof))
618  ConsumeToken();
619 
620  Result = nullptr;
621  switch (Tok.getKind()) {
622  case tok::annot_pragma_unused:
623  HandlePragmaUnused();
624  return false;
625 
626  case tok::kw_export:
627  switch (NextToken().getKind()) {
628  case tok::kw_module:
629  goto module_decl;
630 
631  // Note: no need to handle kw_import here. We only form kw_import under
632  // the Modules TS, and in that case 'export import' is parsed as an
633  // export-declaration containing an import-declaration.
634 
635  // Recognize context-sensitive C++20 'export module' and 'export import'
636  // declarations.
637  case tok::identifier: {
639  if ((II == Ident_module || II == Ident_import) &&
640  GetLookAheadToken(2).isNot(tok::coloncolon)) {
641  if (II == Ident_module)
642  goto module_decl;
643  else
644  goto import_decl;
645  }
646  break;
647  }
648 
649  default:
650  break;
651  }
652  break;
653 
654  case tok::kw_module:
655  module_decl:
656  Result = ParseModuleDecl(ImportState);
657  return false;
658 
659  case tok::kw_import:
660  import_decl: {
661  Decl *ImportDecl = ParseModuleImport(SourceLocation(), ImportState);
662  Result = Actions.ConvertDeclToDeclGroup(ImportDecl);
663  return false;
664  }
665 
666  case tok::annot_module_include:
667  Actions.ActOnModuleInclude(Tok.getLocation(),
668  reinterpret_cast<Module *>(
669  Tok.getAnnotationValue()));
670  ConsumeAnnotationToken();
671  return false;
672 
673  case tok::annot_module_begin:
674  Actions.ActOnModuleBegin(Tok.getLocation(), reinterpret_cast<Module *>(
675  Tok.getAnnotationValue()));
676  ConsumeAnnotationToken();
678  return false;
679 
680  case tok::annot_module_end:
681  Actions.ActOnModuleEnd(Tok.getLocation(), reinterpret_cast<Module *>(
682  Tok.getAnnotationValue()));
683  ConsumeAnnotationToken();
685  return false;
686 
687  case tok::eof:
688  // Check whether -fmax-tokens= was reached.
689  if (PP.getMaxTokens() != 0 && PP.getTokenCount() > PP.getMaxTokens()) {
690  PP.Diag(Tok.getLocation(), diag::warn_max_tokens_total)
691  << PP.getTokenCount() << PP.getMaxTokens();
692  SourceLocation OverrideLoc = PP.getMaxTokensOverrideLoc();
693  if (OverrideLoc.isValid()) {
694  PP.Diag(OverrideLoc, diag::note_max_tokens_total_override);
695  }
696  }
697 
698  // Late template parsing can begin.
699  Actions.SetLateTemplateParser(LateTemplateParserCallback, nullptr, this);
701  Actions.ActOnEndOfTranslationUnit();
702  //else don't tell Sema that we ended parsing: more input might come.
703  return true;
704 
705  case tok::identifier:
706  // C++2a [basic.link]p3:
707  // A token sequence beginning with 'export[opt] module' or
708  // 'export[opt] import' and not immediately followed by '::'
709  // is never interpreted as the declaration of a top-level-declaration.
710  if ((Tok.getIdentifierInfo() == Ident_module ||
711  Tok.getIdentifierInfo() == Ident_import) &&
712  NextToken().isNot(tok::coloncolon)) {
713  if (Tok.getIdentifierInfo() == Ident_module)
714  goto module_decl;
715  else
716  goto import_decl;
717  }
718  break;
719 
720  default:
721  break;
722  }
723 
724  ParsedAttributes attrs(AttrFactory);
725  MaybeParseCXX11Attributes(attrs);
726 
727  Result = ParseExternalDeclaration(attrs);
728  // An empty Result might mean a line with ';' or some parsing error, ignore
729  // it.
730  if (Result) {
731  if (ImportState == Sema::ModuleImportState::FirstDecl)
732  // First decl was not modular.
734  else if (ImportState == Sema::ModuleImportState::ImportAllowed)
735  // Non-imports disallow further imports.
737  }
738  return false;
739 }
740 
741 /// ParseExternalDeclaration:
742 ///
743 /// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl]
744 /// function-definition
745 /// declaration
746 /// [GNU] asm-definition
747 /// [GNU] __extension__ external-declaration
748 /// [OBJC] objc-class-definition
749 /// [OBJC] objc-class-declaration
750 /// [OBJC] objc-alias-declaration
751 /// [OBJC] objc-protocol-definition
752 /// [OBJC] objc-method-definition
753 /// [OBJC] @end
754 /// [C++] linkage-specification
755 /// [GNU] asm-definition:
756 /// simple-asm-expr ';'
757 /// [C++11] empty-declaration
758 /// [C++11] attribute-declaration
759 ///
760 /// [C++11] empty-declaration:
761 /// ';'
762 ///
763 /// [C++0x/GNU] 'extern' 'template' declaration
764 ///
765 /// [Modules-TS] module-import-declaration
766 ///
767 Parser::DeclGroupPtrTy Parser::ParseExternalDeclaration(ParsedAttributes &Attrs,
768  ParsingDeclSpec *DS) {
769  DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(*this);
770  ParenBraceBracketBalancer BalancerRAIIObj(*this);
771 
772  if (PP.isCodeCompletionReached()) {
773  cutOffParsing();
774  return nullptr;
775  }
776 
777  Decl *SingleDecl = nullptr;
778  switch (Tok.getKind()) {
779  case tok::annot_pragma_vis:
780  HandlePragmaVisibility();
781  return nullptr;
782  case tok::annot_pragma_pack:
783  HandlePragmaPack();
784  return nullptr;
785  case tok::annot_pragma_msstruct:
786  HandlePragmaMSStruct();
787  return nullptr;
788  case tok::annot_pragma_align:
789  HandlePragmaAlign();
790  return nullptr;
791  case tok::annot_pragma_weak:
792  HandlePragmaWeak();
793  return nullptr;
794  case tok::annot_pragma_weakalias:
795  HandlePragmaWeakAlias();
796  return nullptr;
797  case tok::annot_pragma_redefine_extname:
798  HandlePragmaRedefineExtname();
799  return nullptr;
800  case tok::annot_pragma_fp_contract:
801  HandlePragmaFPContract();
802  return nullptr;
803  case tok::annot_pragma_fenv_access:
804  case tok::annot_pragma_fenv_access_ms:
805  HandlePragmaFEnvAccess();
806  return nullptr;
807  case tok::annot_pragma_fenv_round:
808  HandlePragmaFEnvRound();
809  return nullptr;
810  case tok::annot_pragma_float_control:
811  HandlePragmaFloatControl();
812  return nullptr;
813  case tok::annot_pragma_fp:
814  HandlePragmaFP();
815  break;
816  case tok::annot_pragma_opencl_extension:
817  HandlePragmaOpenCLExtension();
818  return nullptr;
819  case tok::annot_attr_openmp:
820  case tok::annot_pragma_openmp: {
822  return ParseOpenMPDeclarativeDirectiveWithExtDecl(AS, Attrs);
823  }
824  case tok::annot_pragma_ms_pointers_to_members:
825  HandlePragmaMSPointersToMembers();
826  return nullptr;
827  case tok::annot_pragma_ms_vtordisp:
828  HandlePragmaMSVtorDisp();
829  return nullptr;
830  case tok::annot_pragma_ms_pragma:
831  HandlePragmaMSPragma();
832  return nullptr;
833  case tok::annot_pragma_dump:
834  HandlePragmaDump();
835  return nullptr;
836  case tok::annot_pragma_attribute:
837  HandlePragmaAttribute();
838  return nullptr;
839  case tok::semi:
840  // Either a C++11 empty-declaration or attribute-declaration.
841  SingleDecl =
842  Actions.ActOnEmptyDeclaration(getCurScope(), Attrs, Tok.getLocation());
843  ConsumeExtraSemi(OutsideFunction);
844  break;
845  case tok::r_brace:
846  Diag(Tok, diag::err_extraneous_closing_brace);
847  ConsumeBrace();
848  return nullptr;
849  case tok::eof:
850  Diag(Tok, diag::err_expected_external_declaration);
851  return nullptr;
852  case tok::kw___extension__: {
853  // __extension__ silences extension warnings in the subexpression.
854  ExtensionRAIIObject O(Diags); // Use RAII to do this.
855  ConsumeToken();
856  return ParseExternalDeclaration(Attrs);
857  }
858  case tok::kw_asm: {
859  ProhibitAttributes(Attrs);
860 
861  SourceLocation StartLoc = Tok.getLocation();
862  SourceLocation EndLoc;
863 
864  ExprResult Result(ParseSimpleAsm(/*ForAsmLabel*/ false, &EndLoc));
865 
866  // Check if GNU-style InlineAsm is disabled.
867  // Empty asm string is allowed because it will not introduce
868  // any assembly code.
869  if (!(getLangOpts().GNUAsm || Result.isInvalid())) {
870  const auto *SL = cast<StringLiteral>(Result.get());
871  if (!SL->getString().trim().empty())
872  Diag(StartLoc, diag::err_gnu_inline_asm_disabled);
873  }
874 
875  ExpectAndConsume(tok::semi, diag::err_expected_after,
876  "top-level asm block");
877 
878  if (Result.isInvalid())
879  return nullptr;
880  SingleDecl = Actions.ActOnFileScopeAsmDecl(Result.get(), StartLoc, EndLoc);
881  break;
882  }
883  case tok::at:
884  return ParseObjCAtDirectives(Attrs);
885  case tok::minus:
886  case tok::plus:
887  if (!getLangOpts().ObjC) {
888  Diag(Tok, diag::err_expected_external_declaration);
889  ConsumeToken();
890  return nullptr;
891  }
892  SingleDecl = ParseObjCMethodDefinition();
893  break;
894  case tok::code_completion:
895  cutOffParsing();
896  if (CurParsedObjCImpl) {
897  // Code-complete Objective-C methods even without leading '-'/'+' prefix.
899  /*IsInstanceMethod=*/None,
900  /*ReturnType=*/nullptr);
901  }
902  Actions.CodeCompleteOrdinaryName(
903  getCurScope(),
904  CurParsedObjCImpl ? Sema::PCC_ObjCImplementation : Sema::PCC_Namespace);
905  return nullptr;
906  case tok::kw_import: {
908  if (getLangOpts().CPlusPlusModules) {
909  llvm_unreachable("not expecting a c++20 import here");
910  ProhibitAttributes(Attrs);
911  }
912  SingleDecl = ParseModuleImport(SourceLocation(), IS);
913  } break;
914  case tok::kw_export:
915  if (getLangOpts().CPlusPlusModules || getLangOpts().ModulesTS) {
916  ProhibitAttributes(Attrs);
917  SingleDecl = ParseExportDeclaration();
918  break;
919  }
920  // This must be 'export template'. Parse it so we can diagnose our lack
921  // of support.
922  LLVM_FALLTHROUGH;
923  case tok::kw_using:
924  case tok::kw_namespace:
925  case tok::kw_typedef:
926  case tok::kw_template:
927  case tok::kw_static_assert:
928  case tok::kw__Static_assert:
929  // A function definition cannot start with any of these keywords.
930  {
931  SourceLocation DeclEnd;
932  return ParseDeclaration(DeclaratorContext::File, DeclEnd, Attrs);
933  }
934 
935  case tok::kw_static:
936  // Parse (then ignore) 'static' prior to a template instantiation. This is
937  // a GCC extension that we intentionally do not support.
938  if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
939  Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
940  << 0;
941  SourceLocation DeclEnd;
942  return ParseDeclaration(DeclaratorContext::File, DeclEnd, Attrs);
943  }
944  goto dont_know;
945 
946  case tok::kw_inline:
947  if (getLangOpts().CPlusPlus) {
948  tok::TokenKind NextKind = NextToken().getKind();
949 
950  // Inline namespaces. Allowed as an extension even in C++03.
951  if (NextKind == tok::kw_namespace) {
952  SourceLocation DeclEnd;
953  return ParseDeclaration(DeclaratorContext::File, DeclEnd, Attrs);
954  }
955 
956  // Parse (then ignore) 'inline' prior to a template instantiation. This is
957  // a GCC extension that we intentionally do not support.
958  if (NextKind == tok::kw_template) {
959  Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
960  << 1;
961  SourceLocation DeclEnd;
962  return ParseDeclaration(DeclaratorContext::File, DeclEnd, Attrs);
963  }
964  }
965  goto dont_know;
966 
967  case tok::kw_extern:
968  if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
969  // Extern templates
970  SourceLocation ExternLoc = ConsumeToken();
971  SourceLocation TemplateLoc = ConsumeToken();
972  Diag(ExternLoc, getLangOpts().CPlusPlus11 ?
973  diag::warn_cxx98_compat_extern_template :
974  diag::ext_extern_template) << SourceRange(ExternLoc, TemplateLoc);
975  SourceLocation DeclEnd;
976  return Actions.ConvertDeclToDeclGroup(ParseExplicitInstantiation(
977  DeclaratorContext::File, ExternLoc, TemplateLoc, DeclEnd, Attrs));
978  }
979  goto dont_know;
980 
981  case tok::kw___if_exists:
982  case tok::kw___if_not_exists:
983  ParseMicrosoftIfExistsExternalDeclaration();
984  return nullptr;
985 
986  case tok::kw_module:
987  Diag(Tok, diag::err_unexpected_module_decl);
988  SkipUntil(tok::semi);
989  return nullptr;
990 
991  default:
992  dont_know:
993  if (Tok.isEditorPlaceholder()) {
994  ConsumeToken();
995  return nullptr;
996  }
997  // We can't tell whether this is a function-definition or declaration yet.
998  return ParseDeclarationOrFunctionDefinition(Attrs, DS);
999  }
1000 
1001  // This routine returns a DeclGroup, if the thing we parsed only contains a
1002  // single decl, convert it now.
1003  return Actions.ConvertDeclToDeclGroup(SingleDecl);
1004 }
1005 
1006 /// Determine whether the current token, if it occurs after a
1007 /// declarator, continues a declaration or declaration list.
1008 bool Parser::isDeclarationAfterDeclarator() {
1009  // Check for '= delete' or '= default'
1010  if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
1011  const Token &KW = NextToken();
1012  if (KW.is(tok::kw_default) || KW.is(tok::kw_delete))
1013  return false;
1014  }
1015 
1016  return Tok.is(tok::equal) || // int X()= -> not a function def
1017  Tok.is(tok::comma) || // int X(), -> not a function def
1018  Tok.is(tok::semi) || // int X(); -> not a function def
1019  Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def
1020  Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def
1021  (getLangOpts().CPlusPlus &&
1022  Tok.is(tok::l_paren)); // int X(0) -> not a function def [C++]
1023 }
1024 
1025 /// Determine whether the current token, if it occurs after a
1026 /// declarator, indicates the start of a function definition.
1027 bool Parser::isStartOfFunctionDefinition(const ParsingDeclarator &Declarator) {
1028  assert(Declarator.isFunctionDeclarator() && "Isn't a function declarator");
1029  if (Tok.is(tok::l_brace)) // int X() {}
1030  return true;
1031 
1032  // Handle K&R C argument lists: int X(f) int f; {}
1033  if (!getLangOpts().CPlusPlus &&
1035  return isDeclarationSpecifier();
1036 
1037  if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
1038  const Token &KW = NextToken();
1039  return KW.is(tok::kw_default) || KW.is(tok::kw_delete);
1040  }
1041 
1042  return Tok.is(tok::colon) || // X() : Base() {} (used for ctors)
1043  Tok.is(tok::kw_try); // X() try { ... }
1044 }
1045 
1046 /// Parse either a function-definition or a declaration. We can't tell which
1047 /// we have until we read up to the compound-statement in function-definition.
1048 /// TemplateParams, if non-NULL, provides the template parameters when we're
1049 /// parsing a C++ template-declaration.
1050 ///
1051 /// function-definition: [C99 6.9.1]
1052 /// decl-specs declarator declaration-list[opt] compound-statement
1053 /// [C90] function-definition: [C99 6.7.1] - implicit int result
1054 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
1055 ///
1056 /// declaration: [C99 6.7]
1057 /// declaration-specifiers init-declarator-list[opt] ';'
1058 /// [!C99] init-declarator-list ';' [TODO: warn in c99 mode]
1059 /// [OMP] threadprivate-directive
1060 /// [OMP] allocate-directive [TODO]
1061 ///
1062 Parser::DeclGroupPtrTy Parser::ParseDeclOrFunctionDefInternal(
1064  MaybeParseMicrosoftAttributes(DS.getAttributes());
1065  // Parse the common declaration-specifiers piece.
1066  ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS,
1067  DeclSpecContext::DSC_top_level);
1068 
1069  // If we had a free-standing type definition with a missing semicolon, we
1070  // may get this far before the problem becomes obvious.
1071  if (DS.hasTagDefinition() && DiagnoseMissingSemiAfterTagDefinition(
1072  DS, AS, DeclSpecContext::DSC_top_level))
1073  return nullptr;
1074 
1075  // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
1076  // declaration-specifiers init-declarator-list[opt] ';'
1077  if (Tok.is(tok::semi)) {
1078  auto LengthOfTSTToken = [](DeclSpec::TST TKind) {
1079  assert(DeclSpec::isDeclRep(TKind));
1080  switch(TKind) {
1081  case DeclSpec::TST_class:
1082  return 5;
1083  case DeclSpec::TST_struct:
1084  return 6;
1085  case DeclSpec::TST_union:
1086  return 5;
1087  case DeclSpec::TST_enum:
1088  return 4;
1090  return 9;
1091  default:
1092  llvm_unreachable("we only expect to get the length of the class/struct/union/enum");
1093  }
1094 
1095  };
1096  // Suggest correct location to fix '[[attrib]] struct' to 'struct [[attrib]]'
1097  SourceLocation CorrectLocationForAttributes =
1100  LengthOfTSTToken(DS.getTypeSpecType()))
1101  : SourceLocation();
1102  ProhibitAttributes(Attrs, CorrectLocationForAttributes);
1103  ConsumeToken();
1104  RecordDecl *AnonRecord = nullptr;
1105  Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none,
1106  DS, AnonRecord);
1107  DS.complete(TheDecl);
1108  if (AnonRecord) {
1109  Decl* decls[] = {AnonRecord, TheDecl};
1110  return Actions.BuildDeclaratorGroup(decls);
1111  }
1112  return Actions.ConvertDeclToDeclGroup(TheDecl);
1113  }
1114 
1115  DS.takeAttributesFrom(Attrs);
1116 
1117  // ObjC2 allows prefix attributes on class interfaces and protocols.
1118  // FIXME: This still needs better diagnostics. We should only accept
1119  // attributes here, no types, etc.
1120  if (getLangOpts().ObjC && Tok.is(tok::at)) {
1121  SourceLocation AtLoc = ConsumeToken(); // the "@"
1122  if (!Tok.isObjCAtKeyword(tok::objc_interface) &&
1123  !Tok.isObjCAtKeyword(tok::objc_protocol) &&
1124  !Tok.isObjCAtKeyword(tok::objc_implementation)) {
1125  Diag(Tok, diag::err_objc_unexpected_attr);
1126  SkipUntil(tok::semi);
1127  return nullptr;
1128  }
1129 
1130  DS.abort();
1131 
1132  const char *PrevSpec = nullptr;
1133  unsigned DiagID;
1134  if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec, DiagID,
1135  Actions.getASTContext().getPrintingPolicy()))
1136  Diag(AtLoc, DiagID) << PrevSpec;
1137 
1138  if (Tok.isObjCAtKeyword(tok::objc_protocol))
1139  return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes());
1140 
1141  if (Tok.isObjCAtKeyword(tok::objc_implementation))
1142  return ParseObjCAtImplementationDeclaration(AtLoc, DS.getAttributes());
1143 
1144  return Actions.ConvertDeclToDeclGroup(
1145  ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()));
1146  }
1147 
1148  // If the declspec consisted only of 'extern' and we have a string
1149  // literal following it, this must be a C++ linkage specifier like
1150  // 'extern "C"'.
1151  if (getLangOpts().CPlusPlus && isTokenStringLiteral() &&
1154  Decl *TheDecl = ParseLinkage(DS, DeclaratorContext::File);
1155  return Actions.ConvertDeclToDeclGroup(TheDecl);
1156  }
1157 
1158  return ParseDeclGroup(DS, DeclaratorContext::File);
1159 }
1160 
1161 Parser::DeclGroupPtrTy Parser::ParseDeclarationOrFunctionDefinition(
1163  if (DS) {
1164  return ParseDeclOrFunctionDefInternal(Attrs, *DS, AS);
1165  } else {
1166  ParsingDeclSpec PDS(*this);
1167  // Must temporarily exit the objective-c container scope for
1168  // parsing c constructs and re-enter objc container scope
1169  // afterwards.
1170  ObjCDeclContextSwitch ObjCDC(*this);
1171 
1172  return ParseDeclOrFunctionDefInternal(Attrs, PDS, AS);
1173  }
1174 }
1175 
1176 /// ParseFunctionDefinition - We parsed and verified that the specified
1177 /// Declarator is well formed. If this is a K&R-style function, read the
1178 /// parameters declaration-list, then start the compound-statement.
1179 ///
1180 /// function-definition: [C99 6.9.1]
1181 /// decl-specs declarator declaration-list[opt] compound-statement
1182 /// [C90] function-definition: [C99 6.7.1] - implicit int result
1183 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
1184 /// [C++] function-definition: [C++ 8.4]
1185 /// decl-specifier-seq[opt] declarator ctor-initializer[opt]
1186 /// function-body
1187 /// [C++] function-definition: [C++ 8.4]
1188 /// decl-specifier-seq[opt] declarator function-try-block
1189 ///
1190 Decl *Parser::ParseFunctionDefinition(ParsingDeclarator &D,
1191  const ParsedTemplateInfo &TemplateInfo,
1192  LateParsedAttrList *LateParsedAttrs) {
1193  // Poison SEH identifiers so they are flagged as illegal in function bodies.
1194  PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true);
1196  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
1197 
1198  // If this is C89 and the declspecs were completely missing, fudge in an
1199  // implicit int. We do this here because this is the only place where
1200  // declaration-specifiers are completely optional in the grammar.
1201  if (getLangOpts().isImplicitIntRequired() && D.getDeclSpec().isEmpty()) {
1202  Diag(D.getIdentifierLoc(), diag::warn_missing_type_specifier)
1203  << D.getDeclSpec().getSourceRange();
1204  const char *PrevSpec;
1205  unsigned DiagID;
1206  const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
1208  D.getIdentifierLoc(),
1209  PrevSpec, DiagID,
1210  Policy);
1212  }
1213 
1214  // If this declaration was formed with a K&R-style identifier list for the
1215  // arguments, parse declarations for all of the args next.
1216  // int foo(a,b) int a; float b; {}
1217  if (FTI.isKNRPrototype())
1218  ParseKNRParamDeclarations(D);
1219 
1220  // We should have either an opening brace or, in a C++ constructor,
1221  // we may have a colon.
1222  if (Tok.isNot(tok::l_brace) &&
1223  (!getLangOpts().CPlusPlus ||
1224  (Tok.isNot(tok::colon) && Tok.isNot(tok::kw_try) &&
1225  Tok.isNot(tok::equal)))) {
1226  Diag(Tok, diag::err_expected_fn_body);
1227 
1228  // Skip over garbage, until we get to '{'. Don't eat the '{'.
1229  SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
1230 
1231  // If we didn't find the '{', bail out.
1232  if (Tok.isNot(tok::l_brace))
1233  return nullptr;
1234  }
1235 
1236  // Check to make sure that any normal attributes are allowed to be on
1237  // a definition. Late parsed attributes are checked at the end.
1238  if (Tok.isNot(tok::equal)) {
1239  for (const ParsedAttr &AL : D.getAttributes())
1240  if (AL.isKnownToGCC() && !AL.isStandardAttributeSyntax())
1241  Diag(AL.getLoc(), diag::warn_attribute_on_function_definition) << AL;
1242  }
1243 
1244  // In delayed template parsing mode, for function template we consume the
1245  // tokens and store them for late parsing at the end of the translation unit.
1246  if (getLangOpts().DelayedTemplateParsing && Tok.isNot(tok::equal) &&
1247  TemplateInfo.Kind == ParsedTemplateInfo::Template &&
1248  Actions.canDelayFunctionBody(D)) {
1249  MultiTemplateParamsArg TemplateParameterLists(*TemplateInfo.TemplateParams);
1250 
1251  ParseScope BodyScope(this, Scope::FnScope | Scope::DeclScope |
1253  Scope *ParentScope = getCurScope()->getParent();
1254 
1256  Decl *DP = Actions.HandleDeclarator(ParentScope, D,
1258  D.complete(DP);
1259  D.getMutableDeclSpec().abort();
1260 
1261  if (SkipFunctionBodies && (!DP || Actions.canSkipFunctionBody(DP)) &&
1262  trySkippingFunctionBody()) {
1263  BodyScope.Exit();
1264  return Actions.ActOnSkippedFunctionBody(DP);
1265  }
1266 
1267  CachedTokens Toks;
1268  LexTemplateFunctionForLateParsing(Toks);
1269 
1270  if (DP) {
1271  FunctionDecl *FnD = DP->getAsFunction();
1272  Actions.CheckForFunctionRedefinition(FnD);
1273  Actions.MarkAsLateParsedTemplate(FnD, DP, Toks);
1274  }
1275  return DP;
1276  }
1277  else if (CurParsedObjCImpl &&
1278  !TemplateInfo.TemplateParams &&
1279  (Tok.is(tok::l_brace) || Tok.is(tok::kw_try) ||
1280  Tok.is(tok::colon)) &&
1281  Actions.CurContext->isTranslationUnit()) {
1282  ParseScope BodyScope(this, Scope::FnScope | Scope::DeclScope |
1284  Scope *ParentScope = getCurScope()->getParent();
1285 
1287  Decl *FuncDecl = Actions.HandleDeclarator(ParentScope, D,
1289  D.complete(FuncDecl);
1290  D.getMutableDeclSpec().abort();
1291  if (FuncDecl) {
1292  // Consume the tokens and store them for later parsing.
1293  StashAwayMethodOrFunctionBodyTokens(FuncDecl);
1294  CurParsedObjCImpl->HasCFunction = true;
1295  return FuncDecl;
1296  }
1297  // FIXME: Should we really fall through here?
1298  }
1299 
1300  // Enter a scope for the function body.
1301  ParseScope BodyScope(this, Scope::FnScope | Scope::DeclScope |
1303 
1304  // Parse function body eagerly if it is either '= delete;' or '= default;' as
1305  // ActOnStartOfFunctionDef needs to know whether the function is deleted.
1307  SourceLocation KWLoc;
1308  if (TryConsumeToken(tok::equal)) {
1309  assert(getLangOpts().CPlusPlus && "Only C++ function definitions have '='");
1310 
1311  if (TryConsumeToken(tok::kw_delete, KWLoc)) {
1312  Diag(KWLoc, getLangOpts().CPlusPlus11
1313  ? diag::warn_cxx98_compat_defaulted_deleted_function
1314  : diag::ext_defaulted_deleted_function)
1315  << 1 /* deleted */;
1316  BodyKind = Sema::FnBodyKind::Delete;
1317  } else if (TryConsumeToken(tok::kw_default, KWLoc)) {
1318  Diag(KWLoc, getLangOpts().CPlusPlus11
1319  ? diag::warn_cxx98_compat_defaulted_deleted_function
1320  : diag::ext_defaulted_deleted_function)
1321  << 0 /* defaulted */;
1322  BodyKind = Sema::FnBodyKind::Default;
1323  } else {
1324  llvm_unreachable("function definition after = not 'delete' or 'default'");
1325  }
1326 
1327  if (Tok.is(tok::comma)) {
1328  Diag(KWLoc, diag::err_default_delete_in_multiple_declaration)
1329  << (BodyKind == Sema::FnBodyKind::Delete);
1330  SkipUntil(tok::semi);
1331  } else if (ExpectAndConsume(tok::semi, diag::err_expected_after,
1332  BodyKind == Sema::FnBodyKind::Delete
1333  ? "delete"
1334  : "default")) {
1335  SkipUntil(tok::semi);
1336  }
1337  }
1338 
1339  // Tell the actions module that we have entered a function definition with the
1340  // specified Declarator for the function.
1341  Sema::SkipBodyInfo SkipBody;
1342  Decl *Res = Actions.ActOnStartOfFunctionDef(getCurScope(), D,
1343  TemplateInfo.TemplateParams
1344  ? *TemplateInfo.TemplateParams
1346  &SkipBody, BodyKind);
1347 
1348  if (SkipBody.ShouldSkip) {
1349  // Do NOT enter SkipFunctionBody if we already consumed the tokens.
1350  if (BodyKind == Sema::FnBodyKind::Other)
1351  SkipFunctionBody();
1352 
1353  return Res;
1354  }
1355 
1356  // Break out of the ParsingDeclarator context before we parse the body.
1357  D.complete(Res);
1358 
1359  // Break out of the ParsingDeclSpec context, too. This const_cast is
1360  // safe because we're always the sole owner.
1361  D.getMutableDeclSpec().abort();
1362 
1363  if (BodyKind != Sema::FnBodyKind::Other) {
1364  Actions.SetFunctionBodyKind(Res, KWLoc, BodyKind);
1365  Stmt *GeneratedBody = Res ? Res->getBody() : nullptr;
1366  Actions.ActOnFinishFunctionBody(Res, GeneratedBody, false);
1367  return Res;
1368  }
1369 
1370  // With abbreviated function templates - we need to explicitly add depth to
1371  // account for the implicit template parameter list induced by the template.
1372  if (auto *Template = dyn_cast_or_null<FunctionTemplateDecl>(Res))
1373  if (Template->isAbbreviated() &&
1374  Template->getTemplateParameters()->getParam(0)->isImplicit())
1375  // First template parameter is implicit - meaning no explicit template
1376  // parameter list was specified.
1377  CurTemplateDepthTracker.addDepth(1);
1378 
1379  if (SkipFunctionBodies && (!Res || Actions.canSkipFunctionBody(Res)) &&
1380  trySkippingFunctionBody()) {
1381  BodyScope.Exit();
1382  Actions.ActOnSkippedFunctionBody(Res);
1383  return Actions.ActOnFinishFunctionBody(Res, nullptr, false);
1384  }
1385 
1386  if (Tok.is(tok::kw_try))
1387  return ParseFunctionTryBlock(Res, BodyScope);
1388 
1389  // If we have a colon, then we're probably parsing a C++
1390  // ctor-initializer.
1391  if (Tok.is(tok::colon)) {
1392  ParseConstructorInitializer(Res);
1393 
1394  // Recover from error.
1395  if (!Tok.is(tok::l_brace)) {
1396  BodyScope.Exit();
1397  Actions.ActOnFinishFunctionBody(Res, nullptr);
1398  return Res;
1399  }
1400  } else
1401  Actions.ActOnDefaultCtorInitializers(Res);
1402 
1403  // Late attributes are parsed in the same scope as the function body.
1404  if (LateParsedAttrs)
1405  ParseLexedAttributeList(*LateParsedAttrs, Res, false, true);
1406 
1407  return ParseFunctionStatementBody(Res, BodyScope);
1408 }
1409 
1410 void Parser::SkipFunctionBody() {
1411  if (Tok.is(tok::equal)) {
1412  SkipUntil(tok::semi);
1413  return;
1414  }
1415 
1416  bool IsFunctionTryBlock = Tok.is(tok::kw_try);
1417  if (IsFunctionTryBlock)
1418  ConsumeToken();
1419 
1420  CachedTokens Skipped;
1421  if (ConsumeAndStoreFunctionPrologue(Skipped))
1423  else {
1424  SkipUntil(tok::r_brace);
1425  while (IsFunctionTryBlock && Tok.is(tok::kw_catch)) {
1426  SkipUntil(tok::l_brace);
1427  SkipUntil(tok::r_brace);
1428  }
1429  }
1430 }
1431 
1432 /// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides
1433 /// types for a function with a K&R-style identifier list for arguments.
1434 void Parser::ParseKNRParamDeclarations(Declarator &D) {
1435  // We know that the top-level of this declarator is a function.
1437 
1438  // Enter function-declaration scope, limiting any declarators to the
1439  // function prototype scope, including parameter declarators.
1440  ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
1442 
1443  // Read all the argument declarations.
1444  while (isDeclarationSpecifier()) {
1445  SourceLocation DSStart = Tok.getLocation();
1446 
1447  // Parse the common declaration-specifiers piece.
1448  DeclSpec DS(AttrFactory);
1449  ParseDeclarationSpecifiers(DS);
1450 
1451  // C99 6.9.1p6: 'each declaration in the declaration list shall have at
1452  // least one declarator'.
1453  // NOTE: GCC just makes this an ext-warn. It's not clear what it does with
1454  // the declarations though. It's trivial to ignore them, really hard to do
1455  // anything else with them.
1456  if (TryConsumeToken(tok::semi)) {
1457  Diag(DSStart, diag::err_declaration_does_not_declare_param);
1458  continue;
1459  }
1460 
1461  // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other
1462  // than register.
1466  diag::err_invalid_storage_class_in_func_decl);
1468  }
1471  diag::err_invalid_storage_class_in_func_decl);
1473  }
1474 
1475  // Parse the first declarator attached to this declspec.
1476  Declarator ParmDeclarator(DS, DeclaratorContext::KNRTypeList);
1477  ParseDeclarator(ParmDeclarator);
1478 
1479  // Handle the full declarator list.
1480  while (true) {
1481  // If attributes are present, parse them.
1482  MaybeParseGNUAttributes(ParmDeclarator);
1483 
1484  // Ask the actions module to compute the type for this declarator.
1485  Decl *Param =
1486  Actions.ActOnParamDeclarator(getCurScope(), ParmDeclarator);
1487 
1488  if (Param &&
1489  // A missing identifier has already been diagnosed.
1490  ParmDeclarator.getIdentifier()) {
1491 
1492  // Scan the argument list looking for the correct param to apply this
1493  // type.
1494  for (unsigned i = 0; ; ++i) {
1495  // C99 6.9.1p6: those declarators shall declare only identifiers from
1496  // the identifier list.
1497  if (i == FTI.NumParams) {
1498  Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param)
1499  << ParmDeclarator.getIdentifier();
1500  break;
1501  }
1502 
1503  if (FTI.Params[i].Ident == ParmDeclarator.getIdentifier()) {
1504  // Reject redefinitions of parameters.
1505  if (FTI.Params[i].Param) {
1506  Diag(ParmDeclarator.getIdentifierLoc(),
1507  diag::err_param_redefinition)
1508  << ParmDeclarator.getIdentifier();
1509  } else {
1510  FTI.Params[i].Param = Param;
1511  }
1512  break;
1513  }
1514  }
1515  }
1516 
1517  // If we don't have a comma, it is either the end of the list (a ';') or
1518  // an error, bail out.
1519  if (Tok.isNot(tok::comma))
1520  break;
1521 
1522  ParmDeclarator.clear();
1523 
1524  // Consume the comma.
1525  ParmDeclarator.setCommaLoc(ConsumeToken());
1526 
1527  // Parse the next declarator.
1528  ParseDeclarator(ParmDeclarator);
1529  }
1530 
1531  // Consume ';' and continue parsing.
1532  if (!ExpectAndConsumeSemi(diag::err_expected_semi_declaration))
1533  continue;
1534 
1535  // Otherwise recover by skipping to next semi or mandatory function body.
1536  if (SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch))
1537  break;
1538  TryConsumeToken(tok::semi);
1539  }
1540 
1541  // The actions module must verify that all arguments were declared.
1543 }
1544 
1545 
1546 /// ParseAsmStringLiteral - This is just a normal string-literal, but is not
1547 /// allowed to be a wide string, and is not subject to character translation.
1548 /// Unlike GCC, we also diagnose an empty string literal when parsing for an
1549 /// asm label as opposed to an asm statement, because such a construct does not
1550 /// behave well.
1551 ///
1552 /// [GNU] asm-string-literal:
1553 /// string-literal
1554 ///
1555 ExprResult Parser::ParseAsmStringLiteral(bool ForAsmLabel) {
1556  if (!isTokenStringLiteral()) {
1557  Diag(Tok, diag::err_expected_string_literal)
1558  << /*Source='in...'*/0 << "'asm'";
1559  return ExprError();
1560  }
1561 
1563  if (!AsmString.isInvalid()) {
1564  const auto *SL = cast<StringLiteral>(AsmString.get());
1565  if (!SL->isAscii()) {
1566  Diag(Tok, diag::err_asm_operand_wide_string_literal)
1567  << SL->isWide()
1568  << SL->getSourceRange();
1569  return ExprError();
1570  }
1571  if (ForAsmLabel && SL->getString().empty()) {
1572  Diag(Tok, diag::err_asm_operand_wide_string_literal)
1573  << 2 /* an empty */ << SL->getSourceRange();
1574  return ExprError();
1575  }
1576  }
1577  return AsmString;
1578 }
1579 
1580 /// ParseSimpleAsm
1581 ///
1582 /// [GNU] simple-asm-expr:
1583 /// 'asm' '(' asm-string-literal ')'
1584 ///
1585 ExprResult Parser::ParseSimpleAsm(bool ForAsmLabel, SourceLocation *EndLoc) {
1586  assert(Tok.is(tok::kw_asm) && "Not an asm!");
1587  SourceLocation Loc = ConsumeToken();
1588 
1589  if (isGNUAsmQualifier(Tok)) {
1590  // Remove from the end of 'asm' to the end of the asm qualifier.
1591  SourceRange RemovalRange(PP.getLocForEndOfToken(Loc),
1592  PP.getLocForEndOfToken(Tok.getLocation()));
1593  Diag(Tok, diag::err_global_asm_qualifier_ignored)
1594  << GNUAsmQualifiers::getQualifierName(getGNUAsmQualifier(Tok))
1595  << FixItHint::CreateRemoval(RemovalRange);
1596  ConsumeToken();
1597  }
1598 
1599  BalancedDelimiterTracker T(*this, tok::l_paren);
1600  if (T.consumeOpen()) {
1601  Diag(Tok, diag::err_expected_lparen_after) << "asm";
1602  return ExprError();
1603  }
1604 
1605  ExprResult Result(ParseAsmStringLiteral(ForAsmLabel));
1606 
1607  if (!Result.isInvalid()) {
1608  // Close the paren and get the location of the end bracket
1609  T.consumeClose();
1610  if (EndLoc)
1611  *EndLoc = T.getCloseLocation();
1612  } else if (SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch)) {
1613  if (EndLoc)
1614  *EndLoc = Tok.getLocation();
1615  ConsumeParen();
1616  }
1617 
1618  return Result;
1619 }
1620 
1621 /// Get the TemplateIdAnnotation from the token and put it in the
1622 /// cleanup pool so that it gets destroyed when parsing the current top level
1623 /// declaration is finished.
1624 TemplateIdAnnotation *Parser::takeTemplateIdAnnotation(const Token &tok) {
1625  assert(tok.is(tok::annot_template_id) && "Expected template-id token");
1627  Id = static_cast<TemplateIdAnnotation *>(tok.getAnnotationValue());
1628  return Id;
1629 }
1630 
1631 void Parser::AnnotateScopeToken(CXXScopeSpec &SS, bool IsNewAnnotation) {
1632  // Push the current token back into the token stream (or revert it if it is
1633  // cached) and use an annotation scope token for current token.
1634  if (PP.isBacktrackEnabled())
1635  PP.RevertCachedTokens(1);
1636  else
1637  PP.EnterToken(Tok, /*IsReinject=*/true);
1638  Tok.setKind(tok::annot_cxxscope);
1640  Tok.setAnnotationRange(SS.getRange());
1641 
1642  // In case the tokens were cached, have Preprocessor replace them
1643  // with the annotation token. We don't need to do this if we've
1644  // just reverted back to a prior state.
1645  if (IsNewAnnotation)
1646  PP.AnnotateCachedTokens(Tok);
1647 }
1648 
1649 /// Attempt to classify the name at the current token position. This may
1650 /// form a type, scope or primary expression annotation, or replace the token
1651 /// with a typo-corrected keyword. This is only appropriate when the current
1652 /// name must refer to an entity which has already been declared.
1653 ///
1654 /// \param CCC Indicates how to perform typo-correction for this name. If NULL,
1655 /// no typo correction will be performed.
1656 Parser::AnnotatedNameKind
1657 Parser::TryAnnotateName(CorrectionCandidateCallback *CCC) {
1658  assert(Tok.is(tok::identifier) || Tok.is(tok::annot_cxxscope));
1659 
1660  const bool EnteringContext = false;
1661  const bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
1662 
1663  CXXScopeSpec SS;
1664  if (getLangOpts().CPlusPlus &&
1665  ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
1666  /*ObjectHasErrors=*/false,
1667  EnteringContext))
1668  return ANK_Error;
1669 
1670  if (Tok.isNot(tok::identifier) || SS.isInvalid()) {
1671  if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(SS, !WasScopeAnnotation))
1672  return ANK_Error;
1673  return ANK_Unresolved;
1674  }
1675 
1676  IdentifierInfo *Name = Tok.getIdentifierInfo();
1677  SourceLocation NameLoc = Tok.getLocation();
1678 
1679  // FIXME: Move the tentative declaration logic into ClassifyName so we can
1680  // typo-correct to tentatively-declared identifiers.
1681  if (isTentativelyDeclared(Name)) {
1682  // Identifier has been tentatively declared, and thus cannot be resolved as
1683  // an expression. Fall back to annotating it as a type.
1684  if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(SS, !WasScopeAnnotation))
1685  return ANK_Error;
1686  return Tok.is(tok::annot_typename) ? ANK_Success : ANK_TentativeDecl;
1687  }
1688 
1689  Token Next = NextToken();
1690 
1691  // Look up and classify the identifier. We don't perform any typo-correction
1692  // after a scope specifier, because in general we can't recover from typos
1693  // there (eg, after correcting 'A::template B<X>::C' [sic], we would need to
1694  // jump back into scope specifier parsing).
1695  Sema::NameClassification Classification = Actions.ClassifyName(
1696  getCurScope(), SS, Name, NameLoc, Next, SS.isEmpty() ? CCC : nullptr);
1697 
1698  // If name lookup found nothing and we guessed that this was a template name,
1699  // double-check before committing to that interpretation. C++20 requires that
1700  // we interpret this as a template-id if it can be, but if it can't be, then
1701  // this is an error recovery case.
1702  if (Classification.getKind() == Sema::NC_UndeclaredTemplate &&
1703  isTemplateArgumentList(1) == TPResult::False) {
1704  // It's not a template-id; re-classify without the '<' as a hint.
1705  Token FakeNext = Next;
1706  FakeNext.setKind(tok::unknown);
1707  Classification =
1708  Actions.ClassifyName(getCurScope(), SS, Name, NameLoc, FakeNext,
1709  SS.isEmpty() ? CCC : nullptr);
1710  }
1711 
1712  switch (Classification.getKind()) {
1713  case Sema::NC_Error:
1714  return ANK_Error;
1715 
1716  case Sema::NC_Keyword:
1717  // The identifier was typo-corrected to a keyword.
1718  Tok.setIdentifierInfo(Name);
1719  Tok.setKind(Name->getTokenID());
1720  PP.TypoCorrectToken(Tok);
1721  if (SS.isNotEmpty())
1722  AnnotateScopeToken(SS, !WasScopeAnnotation);
1723  // We've "annotated" this as a keyword.
1724  return ANK_Success;
1725 
1726  case Sema::NC_Unknown:
1727  // It's not something we know about. Leave it unannotated.
1728  break;
1729 
1730  case Sema::NC_Type: {
1731  if (TryAltiVecVectorToken())
1732  // vector has been found as a type id when altivec is enabled but
1733  // this is followed by a declaration specifier so this is really the
1734  // altivec vector token. Leave it unannotated.
1735  break;
1736  SourceLocation BeginLoc = NameLoc;
1737  if (SS.isNotEmpty())
1738  BeginLoc = SS.getBeginLoc();
1739 
1740  /// An Objective-C object type followed by '<' is a specialization of
1741  /// a parameterized class type or a protocol-qualified type.
1742  ParsedType Ty = Classification.getType();
1743  if (getLangOpts().ObjC && NextToken().is(tok::less) &&
1744  (Ty.get()->isObjCObjectType() ||
1745  Ty.get()->isObjCObjectPointerType())) {
1746  // Consume the name.
1748  SourceLocation NewEndLoc;
1749  TypeResult NewType
1750  = parseObjCTypeArgsAndProtocolQualifiers(IdentifierLoc, Ty,
1751  /*consumeLastToken=*/false,
1752  NewEndLoc);
1753  if (NewType.isUsable())
1754  Ty = NewType.get();
1755  else if (Tok.is(tok::eof)) // Nothing to do here, bail out...
1756  return ANK_Error;
1757  }
1758 
1759  Tok.setKind(tok::annot_typename);
1760  setTypeAnnotation(Tok, Ty);
1761  Tok.setAnnotationEndLoc(Tok.getLocation());
1762  Tok.setLocation(BeginLoc);
1763  PP.AnnotateCachedTokens(Tok);
1764  return ANK_Success;
1765  }
1766 
1767  case Sema::NC_OverloadSet:
1768  Tok.setKind(tok::annot_overload_set);
1769  setExprAnnotation(Tok, Classification.getExpression());
1770  Tok.setAnnotationEndLoc(NameLoc);
1771  if (SS.isNotEmpty())
1772  Tok.setLocation(SS.getBeginLoc());
1773  PP.AnnotateCachedTokens(Tok);
1774  return ANK_Success;
1775 
1776  case Sema::NC_NonType:
1777  if (TryAltiVecVectorToken())
1778  // vector has been found as a non-type id when altivec is enabled but
1779  // this is followed by a declaration specifier so this is really the
1780  // altivec vector token. Leave it unannotated.
1781  break;
1782  Tok.setKind(tok::annot_non_type);
1783  setNonTypeAnnotation(Tok, Classification.getNonTypeDecl());
1784  Tok.setLocation(NameLoc);
1785  Tok.setAnnotationEndLoc(NameLoc);
1786  PP.AnnotateCachedTokens(Tok);
1787  if (SS.isNotEmpty())
1788  AnnotateScopeToken(SS, !WasScopeAnnotation);
1789  return ANK_Success;
1790 
1793  Tok.setKind(Classification.getKind() == Sema::NC_UndeclaredNonType
1794  ? tok::annot_non_type_undeclared
1795  : tok::annot_non_type_dependent);
1796  setIdentifierAnnotation(Tok, Name);
1797  Tok.setLocation(NameLoc);
1798  Tok.setAnnotationEndLoc(NameLoc);
1799  PP.AnnotateCachedTokens(Tok);
1800  if (SS.isNotEmpty())
1801  AnnotateScopeToken(SS, !WasScopeAnnotation);
1802  return ANK_Success;
1803 
1804  case Sema::NC_TypeTemplate:
1805  if (Next.isNot(tok::less)) {
1806  // This may be a type template being used as a template template argument.
1807  if (SS.isNotEmpty())
1808  AnnotateScopeToken(SS, !WasScopeAnnotation);
1809  return ANK_TemplateName;
1810  }
1811  LLVM_FALLTHROUGH;
1812  case Sema::NC_VarTemplate:
1815  // We have a type, variable or function template followed by '<'.
1816  ConsumeToken();
1817  UnqualifiedId Id;
1818  Id.setIdentifier(Name, NameLoc);
1819  if (AnnotateTemplateIdToken(
1820  TemplateTy::make(Classification.getTemplateName()),
1821  Classification.getTemplateNameKind(), SS, SourceLocation(), Id))
1822  return ANK_Error;
1823  return ANK_Success;
1824  }
1825  case Sema::NC_Concept: {
1826  UnqualifiedId Id;
1827  Id.setIdentifier(Name, NameLoc);
1828  if (Next.is(tok::less))
1829  // We have a concept name followed by '<'. Consume the identifier token so
1830  // we reach the '<' and annotate it.
1831  ConsumeToken();
1832  if (AnnotateTemplateIdToken(
1833  TemplateTy::make(Classification.getTemplateName()),
1834  Classification.getTemplateNameKind(), SS, SourceLocation(), Id,
1835  /*AllowTypeAnnotation=*/false, /*TypeConstraint=*/true))
1836  return ANK_Error;
1837  return ANK_Success;
1838  }
1839  }
1840 
1841  // Unable to classify the name, but maybe we can annotate a scope specifier.
1842  if (SS.isNotEmpty())
1843  AnnotateScopeToken(SS, !WasScopeAnnotation);
1844  return ANK_Unresolved;
1845 }
1846 
1847 bool Parser::TryKeywordIdentFallback(bool DisableKeyword) {
1848  assert(Tok.isNot(tok::identifier));
1849  Diag(Tok, diag::ext_keyword_as_ident)
1850  << PP.getSpelling(Tok)
1851  << DisableKeyword;
1852  if (DisableKeyword)
1854  Tok.setKind(tok::identifier);
1855  return true;
1856 }
1857 
1858 /// TryAnnotateTypeOrScopeToken - If the current token position is on a
1859 /// typename (possibly qualified in C++) or a C++ scope specifier not followed
1860 /// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens
1861 /// with a single annotation token representing the typename or C++ scope
1862 /// respectively.
1863 /// This simplifies handling of C++ scope specifiers and allows efficient
1864 /// backtracking without the need to re-parse and resolve nested-names and
1865 /// typenames.
1866 /// It will mainly be called when we expect to treat identifiers as typenames
1867 /// (if they are typenames). For example, in C we do not expect identifiers
1868 /// inside expressions to be treated as typenames so it will not be called
1869 /// for expressions in C.
1870 /// The benefit for C/ObjC is that a typename will be annotated and
1871 /// Actions.getTypeName will not be needed to be called again (e.g. getTypeName
1872 /// will not be called twice, once to check whether we have a declaration
1873 /// specifier, and another one to get the actual type inside
1874 /// ParseDeclarationSpecifiers).
1875 ///
1876 /// This returns true if an error occurred.
1877 ///
1878 /// Note that this routine emits an error if you call it with ::new or ::delete
1879 /// as the current tokens, so only call it in contexts where these are invalid.
1881  assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
1882  Tok.is(tok::kw_typename) || Tok.is(tok::annot_cxxscope) ||
1883  Tok.is(tok::kw_decltype) || Tok.is(tok::annot_template_id) ||
1884  Tok.is(tok::kw___super)) &&
1885  "Cannot be a type or scope token!");
1886 
1887  if (Tok.is(tok::kw_typename)) {
1888  // MSVC lets you do stuff like:
1889  // typename typedef T_::D D;
1890  //
1891  // We will consume the typedef token here and put it back after we have
1892  // parsed the first identifier, transforming it into something more like:
1893  // typename T_::D typedef D;
1894  if (getLangOpts().MSVCCompat && NextToken().is(tok::kw_typedef)) {
1895  Token TypedefToken;
1896  PP.Lex(TypedefToken);
1897  bool Result = TryAnnotateTypeOrScopeToken();
1898  PP.EnterToken(Tok, /*IsReinject=*/true);
1899  Tok = TypedefToken;
1900  if (!Result)
1901  Diag(Tok.getLocation(), diag::warn_expected_qualified_after_typename);
1902  return Result;
1903  }
1904 
1905  // Parse a C++ typename-specifier, e.g., "typename T::type".
1906  //
1907  // typename-specifier:
1908  // 'typename' '::' [opt] nested-name-specifier identifier
1909  // 'typename' '::' [opt] nested-name-specifier template [opt]
1910  // simple-template-id
1911  SourceLocation TypenameLoc = ConsumeToken();
1912  CXXScopeSpec SS;
1913  if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
1914  /*ObjectHasErrors=*/false,
1915  /*EnteringContext=*/false, nullptr,
1916  /*IsTypename*/ true))
1917  return true;
1918  if (SS.isEmpty()) {
1919  if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id) ||
1920  Tok.is(tok::annot_decltype)) {
1921  // Attempt to recover by skipping the invalid 'typename'
1922  if (Tok.is(tok::annot_decltype) ||
1923  (!TryAnnotateTypeOrScopeToken() && Tok.isAnnotation())) {
1924  unsigned DiagID = diag::err_expected_qualified_after_typename;
1925  // MS compatibility: MSVC permits using known types with typename.
1926  // e.g. "typedef typename T* pointer_type"
1927  if (getLangOpts().MicrosoftExt)
1928  DiagID = diag::warn_expected_qualified_after_typename;
1929  Diag(Tok.getLocation(), DiagID);
1930  return false;
1931  }
1932  }
1933  if (Tok.isEditorPlaceholder())
1934  return true;
1935 
1936  Diag(Tok.getLocation(), diag::err_expected_qualified_after_typename);
1937  return true;
1938  }
1939 
1940  TypeResult Ty;
1941  if (Tok.is(tok::identifier)) {
1942  // FIXME: check whether the next token is '<', first!
1943  Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
1944  *Tok.getIdentifierInfo(),
1945  Tok.getLocation());
1946  } else if (Tok.is(tok::annot_template_id)) {
1947  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1948  if (!TemplateId->mightBeType()) {
1949  Diag(Tok, diag::err_typename_refers_to_non_type_template)
1950  << Tok.getAnnotationRange();
1951  return true;
1952  }
1953 
1954  ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
1955  TemplateId->NumArgs);
1956 
1957  Ty = TemplateId->isInvalid()
1958  ? TypeError()
1959  : Actions.ActOnTypenameType(
1960  getCurScope(), TypenameLoc, SS, TemplateId->TemplateKWLoc,
1961  TemplateId->Template, TemplateId->Name,
1962  TemplateId->TemplateNameLoc, TemplateId->LAngleLoc,
1963  TemplateArgsPtr, TemplateId->RAngleLoc);
1964  } else {
1965  Diag(Tok, diag::err_expected_type_name_after_typename)
1966  << SS.getRange();
1967  return true;
1968  }
1969 
1970  SourceLocation EndLoc = Tok.getLastLoc();
1971  Tok.setKind(tok::annot_typename);
1972  setTypeAnnotation(Tok, Ty);
1973  Tok.setAnnotationEndLoc(EndLoc);
1974  Tok.setLocation(TypenameLoc);
1975  PP.AnnotateCachedTokens(Tok);
1976  return false;
1977  }
1978 
1979  // Remembers whether the token was originally a scope annotation.
1980  bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
1981 
1982  CXXScopeSpec SS;
1983  if (getLangOpts().CPlusPlus)
1984  if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
1985  /*ObjectHasErrors=*/false,
1986  /*EnteringContext*/ false))
1987  return true;
1988 
1989  return TryAnnotateTypeOrScopeTokenAfterScopeSpec(SS, !WasScopeAnnotation);
1990 }
1991 
1992 /// Try to annotate a type or scope token, having already parsed an
1993 /// optional scope specifier. \p IsNewScope should be \c true unless the scope
1994 /// specifier was extracted from an existing tok::annot_cxxscope annotation.
1996  bool IsNewScope) {
1997  if (Tok.is(tok::identifier)) {
1998  // Determine whether the identifier is a type name.
1999  if (ParsedType Ty = Actions.getTypeName(
2000  *Tok.getIdentifierInfo(), Tok.getLocation(), getCurScope(), &SS,
2001  false, NextToken().is(tok::period), nullptr,
2002  /*IsCtorOrDtorName=*/false,
2003  /*NonTrivialTypeSourceInfo*/true,
2004  /*IsClassTemplateDeductionContext*/true)) {
2005  SourceLocation BeginLoc = Tok.getLocation();
2006  if (SS.isNotEmpty()) // it was a C++ qualified type name.
2007  BeginLoc = SS.getBeginLoc();
2008 
2009  /// An Objective-C object type followed by '<' is a specialization of
2010  /// a parameterized class type or a protocol-qualified type.
2011  if (getLangOpts().ObjC && NextToken().is(tok::less) &&
2012  (Ty.get()->isObjCObjectType() ||
2013  Ty.get()->isObjCObjectPointerType())) {
2014  // Consume the name.
2016  SourceLocation NewEndLoc;
2017  TypeResult NewType
2018  = parseObjCTypeArgsAndProtocolQualifiers(IdentifierLoc, Ty,
2019  /*consumeLastToken=*/false,
2020  NewEndLoc);
2021  if (NewType.isUsable())
2022  Ty = NewType.get();
2023  else if (Tok.is(tok::eof)) // Nothing to do here, bail out...
2024  return false;
2025  }
2026 
2027  // This is a typename. Replace the current token in-place with an
2028  // annotation type token.
2029  Tok.setKind(tok::annot_typename);
2030  setTypeAnnotation(Tok, Ty);
2031  Tok.setAnnotationEndLoc(Tok.getLocation());
2032  Tok.setLocation(BeginLoc);
2033 
2034  // In case the tokens were cached, have Preprocessor replace
2035  // them with the annotation token.
2036  PP.AnnotateCachedTokens(Tok);
2037  return false;
2038  }
2039 
2040  if (!getLangOpts().CPlusPlus) {
2041  // If we're in C, we can't have :: tokens at all (the lexer won't return
2042  // them). If the identifier is not a type, then it can't be scope either,
2043  // just early exit.
2044  return false;
2045  }
2046 
2047  // If this is a template-id, annotate with a template-id or type token.
2048  // FIXME: This appears to be dead code. We already have formed template-id
2049  // tokens when parsing the scope specifier; this can never form a new one.
2050  if (NextToken().is(tok::less)) {
2051  TemplateTy Template;
2053  TemplateName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
2054  bool MemberOfUnknownSpecialization;
2055  if (TemplateNameKind TNK = Actions.isTemplateName(
2056  getCurScope(), SS,
2057  /*hasTemplateKeyword=*/false, TemplateName,
2058  /*ObjectType=*/nullptr, /*EnteringContext*/false, Template,
2059  MemberOfUnknownSpecialization)) {
2060  // Only annotate an undeclared template name as a template-id if the
2061  // following tokens have the form of a template argument list.
2062  if (TNK != TNK_Undeclared_template ||
2063  isTemplateArgumentList(1) != TPResult::False) {
2064  // Consume the identifier.
2065  ConsumeToken();
2066  if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(),
2067  TemplateName)) {
2068  // If an unrecoverable error occurred, we need to return true here,
2069  // because the token stream is in a damaged state. We may not
2070  // return a valid identifier.
2071  return true;
2072  }
2073  }
2074  }
2075  }
2076 
2077  // The current token, which is either an identifier or a
2078  // template-id, is not part of the annotation. Fall through to
2079  // push that token back into the stream and complete the C++ scope
2080  // specifier annotation.
2081  }
2082 
2083  if (Tok.is(tok::annot_template_id)) {
2084  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
2085  if (TemplateId->Kind == TNK_Type_template) {
2086  // A template-id that refers to a type was parsed into a
2087  // template-id annotation in a context where we weren't allowed
2088  // to produce a type annotation token. Update the template-id
2089  // annotation token to a type annotation token now.
2090  AnnotateTemplateIdTokenAsType(SS);
2091  return false;
2092  }
2093  }
2094 
2095  if (SS.isEmpty())
2096  return false;
2097 
2098  // A C++ scope specifier that isn't followed by a typename.
2099  AnnotateScopeToken(SS, IsNewScope);
2100  return false;
2101 }
2102 
2103 /// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only
2104 /// annotates C++ scope specifiers and template-ids. This returns
2105 /// true if there was an error that could not be recovered from.
2106 ///
2107 /// Note that this routine emits an error if you call it with ::new or ::delete
2108 /// as the current tokens, so only call it in contexts where these are invalid.
2109 bool Parser::TryAnnotateCXXScopeToken(bool EnteringContext) {
2110  assert(getLangOpts().CPlusPlus &&
2111  "Call sites of this function should be guarded by checking for C++");
2112  assert(MightBeCXXScopeToken() && "Cannot be a type or scope token!");
2113 
2114  CXXScopeSpec SS;
2115  if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
2116  /*ObjectHasErrors=*/false,
2117  EnteringContext))
2118  return true;
2119  if (SS.isEmpty())
2120  return false;
2121 
2122  AnnotateScopeToken(SS, true);
2123  return false;
2124 }
2125 
2126 bool Parser::isTokenEqualOrEqualTypo() {
2127  tok::TokenKind Kind = Tok.getKind();
2128  switch (Kind) {
2129  default:
2130  return false;
2131  case tok::ampequal: // &=
2132  case tok::starequal: // *=
2133  case tok::plusequal: // +=
2134  case tok::minusequal: // -=
2135  case tok::exclaimequal: // !=
2136  case tok::slashequal: // /=
2137  case tok::percentequal: // %=
2138  case tok::lessequal: // <=
2139  case tok::lesslessequal: // <<=
2140  case tok::greaterequal: // >=
2141  case tok::greatergreaterequal: // >>=
2142  case tok::caretequal: // ^=
2143  case tok::pipeequal: // |=
2144  case tok::equalequal: // ==
2145  Diag(Tok, diag::err_invalid_token_after_declarator_suggest_equal)
2146  << Kind
2148  LLVM_FALLTHROUGH;
2149  case tok::equal:
2150  return true;
2151  }
2152 }
2153 
2154 SourceLocation Parser::handleUnexpectedCodeCompletionToken() {
2155  assert(Tok.is(tok::code_completion));
2156  PrevTokLocation = Tok.getLocation();
2157 
2158  for (Scope *S = getCurScope(); S; S = S->getParent()) {
2159  if (S->isFunctionScope()) {
2160  cutOffParsing();
2163  return PrevTokLocation;
2164  }
2165 
2166  if (S->isClassScope()) {
2167  cutOffParsing();
2169  return PrevTokLocation;
2170  }
2171  }
2172 
2173  cutOffParsing();
2175  return PrevTokLocation;
2176 }
2177 
2178 // Code-completion pass-through functions
2179 
2180 void Parser::CodeCompleteDirective(bool InConditional) {
2181  Actions.CodeCompletePreprocessorDirective(InConditional);
2182 }
2183 
2184 void Parser::CodeCompleteInConditionalExclusion() {
2186 }
2187 
2188 void Parser::CodeCompleteMacroName(bool IsDefinition) {
2189  Actions.CodeCompletePreprocessorMacroName(IsDefinition);
2190 }
2191 
2192 void Parser::CodeCompletePreprocessorExpression() {
2194 }
2195 
2196 void Parser::CodeCompleteMacroArgument(IdentifierInfo *Macro,
2198  unsigned ArgumentIndex) {
2200  ArgumentIndex);
2201 }
2202 
2203 void Parser::CodeCompleteIncludedFile(llvm::StringRef Dir, bool IsAngled) {
2204  Actions.CodeCompleteIncludedFile(Dir, IsAngled);
2205 }
2206 
2207 void Parser::CodeCompleteNaturalLanguage() {
2208  Actions.CodeCompleteNaturalLanguage();
2209 }
2210 
2211 bool Parser::ParseMicrosoftIfExistsCondition(IfExistsCondition& Result) {
2212  assert((Tok.is(tok::kw___if_exists) || Tok.is(tok::kw___if_not_exists)) &&
2213  "Expected '__if_exists' or '__if_not_exists'");
2214  Result.IsIfExists = Tok.is(tok::kw___if_exists);
2215  Result.KeywordLoc = ConsumeToken();
2216 
2217  BalancedDelimiterTracker T(*this, tok::l_paren);
2218  if (T.consumeOpen()) {
2219  Diag(Tok, diag::err_expected_lparen_after)
2220  << (Result.IsIfExists? "__if_exists" : "__if_not_exists");
2221  return true;
2222  }
2223 
2224  // Parse nested-name-specifier.
2225  if (getLangOpts().CPlusPlus)
2226  ParseOptionalCXXScopeSpecifier(Result.SS, /*ObjectType=*/nullptr,
2227  /*ObjectHasErrors=*/false,
2228  /*EnteringContext=*/false);
2229 
2230  // Check nested-name specifier.
2231  if (Result.SS.isInvalid()) {
2232  T.skipToEnd();
2233  return true;
2234  }
2235 
2236  // Parse the unqualified-id.
2237  SourceLocation TemplateKWLoc; // FIXME: parsed, but unused.
2238  if (ParseUnqualifiedId(Result.SS, /*ObjectType=*/nullptr,
2239  /*ObjectHadErrors=*/false, /*EnteringContext*/ false,
2240  /*AllowDestructorName*/ true,
2241  /*AllowConstructorName*/ true,
2242  /*AllowDeductionGuide*/ false, &TemplateKWLoc,
2243  Result.Name)) {
2244  T.skipToEnd();
2245  return true;
2246  }
2247 
2248  if (T.consumeClose())
2249  return true;
2250 
2251  // Check if the symbol exists.
2252  switch (Actions.CheckMicrosoftIfExistsSymbol(getCurScope(), Result.KeywordLoc,
2253  Result.IsIfExists, Result.SS,
2254  Result.Name)) {
2255  case Sema::IER_Exists:
2256  Result.Behavior = Result.IsIfExists ? IEB_Parse : IEB_Skip;
2257  break;
2258 
2260  Result.Behavior = !Result.IsIfExists ? IEB_Parse : IEB_Skip;
2261  break;
2262 
2263  case Sema::IER_Dependent:
2264  Result.Behavior = IEB_Dependent;
2265  break;
2266 
2267  case Sema::IER_Error:
2268  return true;
2269  }
2270 
2271  return false;
2272 }
2273 
2274 void Parser::ParseMicrosoftIfExistsExternalDeclaration() {
2275  IfExistsCondition Result;
2276  if (ParseMicrosoftIfExistsCondition(Result))
2277  return;
2278 
2279  BalancedDelimiterTracker Braces(*this, tok::l_brace);
2280  if (Braces.consumeOpen()) {
2281  Diag(Tok, diag::err_expected) << tok::l_brace;
2282  return;
2283  }
2284 
2285  switch (Result.Behavior) {
2286  case IEB_Parse:
2287  // Parse declarations below.
2288  break;
2289 
2290  case IEB_Dependent:
2291  llvm_unreachable("Cannot have a dependent external declaration");
2292 
2293  case IEB_Skip:
2294  Braces.skipToEnd();
2295  return;
2296  }
2297 
2298  // Parse the declarations.
2299  // FIXME: Support module import within __if_exists?
2300  while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
2301  ParsedAttributes Attrs(AttrFactory);
2302  MaybeParseCXX11Attributes(Attrs);
2303  DeclGroupPtrTy Result = ParseExternalDeclaration(Attrs);
2304  if (Result && !getCurScope()->getParent())
2305  Actions.getASTConsumer().HandleTopLevelDecl(Result.get());
2306  }
2307  Braces.consumeClose();
2308 }
2309 
2310 /// Parse a declaration beginning with the 'module' keyword or C++20
2311 /// context-sensitive keyword (optionally preceded by 'export').
2312 ///
2313 /// module-declaration: [Modules TS + P0629R0]
2314 /// 'export'[opt] 'module' module-name attribute-specifier-seq[opt] ';'
2315 ///
2316 /// global-module-fragment: [C++2a]
2317 /// 'module' ';' top-level-declaration-seq[opt]
2318 /// module-declaration: [C++2a]
2319 /// 'export'[opt] 'module' module-name module-partition[opt]
2320 /// attribute-specifier-seq[opt] ';'
2321 /// private-module-fragment: [C++2a]
2322 /// 'module' ':' 'private' ';' top-level-declaration-seq[opt]
2324 Parser::ParseModuleDecl(Sema::ModuleImportState &ImportState) {
2325  SourceLocation StartLoc = Tok.getLocation();
2326 
2327  Sema::ModuleDeclKind MDK = TryConsumeToken(tok::kw_export)
2330 
2331  assert(
2332  (Tok.is(tok::kw_module) ||
2333  (Tok.is(tok::identifier) && Tok.getIdentifierInfo() == Ident_module)) &&
2334  "not a module declaration");
2335  SourceLocation ModuleLoc = ConsumeToken();
2336 
2337  // Attributes appear after the module name, not before.
2338  // FIXME: Suggest moving the attributes later with a fixit.
2339  DiagnoseAndSkipCXX11Attributes();
2340 
2341  // Parse a global-module-fragment, if present.
2342  if (getLangOpts().CPlusPlusModules && Tok.is(tok::semi)) {
2343  SourceLocation SemiLoc = ConsumeToken();
2344  if (ImportState != Sema::ModuleImportState::FirstDecl) {
2345  Diag(StartLoc, diag::err_global_module_introducer_not_at_start)
2346  << SourceRange(StartLoc, SemiLoc);
2347  return nullptr;
2348  }
2349  if (MDK == Sema::ModuleDeclKind::Interface) {
2350  Diag(StartLoc, diag::err_module_fragment_exported)
2351  << /*global*/0 << FixItHint::CreateRemoval(StartLoc);
2352  }
2354  return Actions.ActOnGlobalModuleFragmentDecl(ModuleLoc);
2355  }
2356 
2357  // Parse a private-module-fragment, if present.
2358  if (getLangOpts().CPlusPlusModules && Tok.is(tok::colon) &&
2359  NextToken().is(tok::kw_private)) {
2360  if (MDK == Sema::ModuleDeclKind::Interface) {
2361  Diag(StartLoc, diag::err_module_fragment_exported)
2362  << /*private*/1 << FixItHint::CreateRemoval(StartLoc);
2363  }
2364  ConsumeToken();
2365  SourceLocation PrivateLoc = ConsumeToken();
2366  DiagnoseAndSkipCXX11Attributes();
2367  ExpectAndConsumeSemi(diag::err_private_module_fragment_expected_semi);
2369  return Actions.ActOnPrivateModuleFragmentDecl(ModuleLoc, PrivateLoc);
2370  }
2371 
2373  if (ParseModuleName(ModuleLoc, Path, /*IsImport*/ false))
2374  return nullptr;
2375 
2376  // Parse the optional module-partition.
2378  if (Tok.is(tok::colon)) {
2379  SourceLocation ColonLoc = ConsumeToken();
2380  if (!getLangOpts().CPlusPlusModules)
2381  Diag(ColonLoc, diag::err_unsupported_module_partition)
2382  << SourceRange(ColonLoc, Partition.back().second);
2383  // Recover by ignoring the partition name.
2384  else if (ParseModuleName(ModuleLoc, Partition, /*IsImport*/ false))
2385  return nullptr;
2386  }
2387 
2388  // We don't support any module attributes yet; just parse them and diagnose.
2389  ParsedAttributes Attrs(AttrFactory);
2390  MaybeParseCXX11Attributes(Attrs);
2391  ProhibitCXX11Attributes(Attrs, diag::err_attribute_not_module_attr,
2392  /*DiagnoseEmptyAttrs=*/false,
2393  /*WarnOnUnknownAttrs=*/true);
2394 
2395  ExpectAndConsumeSemi(diag::err_module_expected_semi);
2396 
2397  return Actions.ActOnModuleDecl(StartLoc, ModuleLoc, MDK, Path, Partition,
2398  ImportState);
2399 }
2400 
2401 /// Parse a module import declaration. This is essentially the same for
2402 /// Objective-C and C++20 except for the leading '@' (in ObjC) and the
2403 /// trailing optional attributes (in C++).
2404 ///
2405 /// [ObjC] @import declaration:
2406 /// '@' 'import' module-name ';'
2407 /// [ModTS] module-import-declaration:
2408 /// 'import' module-name attribute-specifier-seq[opt] ';'
2409 /// [C++20] module-import-declaration:
2410 /// 'export'[opt] 'import' module-name
2411 /// attribute-specifier-seq[opt] ';'
2412 /// 'export'[opt] 'import' module-partition
2413 /// attribute-specifier-seq[opt] ';'
2414 /// 'export'[opt] 'import' header-name
2415 /// attribute-specifier-seq[opt] ';'
2416 Decl *Parser::ParseModuleImport(SourceLocation AtLoc,
2417  Sema::ModuleImportState &ImportState) {
2418  SourceLocation StartLoc = AtLoc.isInvalid() ? Tok.getLocation() : AtLoc;
2419 
2420  SourceLocation ExportLoc;
2421  TryConsumeToken(tok::kw_export, ExportLoc);
2422 
2423  assert((AtLoc.isInvalid() ? Tok.isOneOf(tok::kw_import, tok::identifier)
2424  : Tok.isObjCAtKeyword(tok::objc_import)) &&
2425  "Improper start to module import");
2426  bool IsObjCAtImport = Tok.isObjCAtKeyword(tok::objc_import);
2427  SourceLocation ImportLoc = ConsumeToken();
2428 
2429  // For C++20 modules, we can have "name" or ":Partition name" as valid input.
2431  bool IsPartition = false;
2432  Module *HeaderUnit = nullptr;
2433  if (Tok.is(tok::header_name)) {
2434  // This is a header import that the preprocessor decided we should skip
2435  // because it was malformed in some way. Parse and ignore it; it's already
2436  // been diagnosed.
2437  ConsumeToken();
2438  } else if (Tok.is(tok::annot_header_unit)) {
2439  // This is a header import that the preprocessor mapped to a module import.
2440  HeaderUnit = reinterpret_cast<Module *>(Tok.getAnnotationValue());
2441  ConsumeAnnotationToken();
2442  } else if (Tok.is(tok::colon)) {
2443  SourceLocation ColonLoc = ConsumeToken();
2444  if (!getLangOpts().CPlusPlusModules)
2445  Diag(ColonLoc, diag::err_unsupported_module_partition)
2446  << SourceRange(ColonLoc, Path.back().second);
2447  // Recover by leaving partition empty.
2448  else if (ParseModuleName(ColonLoc, Path, /*IsImport*/ true))
2449  return nullptr;
2450  else
2451  IsPartition = true;
2452  } else {
2453  if (ParseModuleName(ImportLoc, Path, /*IsImport*/ true))
2454  return nullptr;
2455  }
2456 
2457  ParsedAttributes Attrs(AttrFactory);
2458  MaybeParseCXX11Attributes(Attrs);
2459  // We don't support any module import attributes yet.
2460  ProhibitCXX11Attributes(Attrs, diag::err_attribute_not_import_attr,
2461  /*DiagnoseEmptyAttrs=*/false,
2462  /*WarnOnUnknownAttrs=*/true);
2463 
2464  if (PP.hadModuleLoaderFatalFailure()) {
2465  // With a fatal failure in the module loader, we abort parsing.
2466  cutOffParsing();
2467  return nullptr;
2468  }
2469 
2470  // Diagnose mis-imports.
2471  bool SeenError = true;
2472  switch (ImportState) {
2474  SeenError = false;
2475  break;
2478  // We can only import a partition within a module purview.
2479  if (IsPartition)
2480  Diag(ImportLoc, diag::err_partition_import_outside_module);
2481  else
2482  SeenError = false;
2483  break;
2485  // We can only have pre-processor directives in the global module
2486  // fragment. We cannot import a named modules here, however we have a
2487  // header unit import.
2488  if (!HeaderUnit || HeaderUnit->Kind != Module::ModuleKind::ModuleHeaderUnit)
2489  Diag(ImportLoc, diag::err_import_in_wrong_fragment) << IsPartition << 0;
2490  else
2491  SeenError = false;
2492  break;
2494  if (getLangOpts().CPlusPlusModules)
2495  Diag(ImportLoc, diag::err_import_not_allowed_here);
2496  else
2497  SeenError = false;
2498  break;
2500  Diag(ImportLoc, diag::err_import_in_wrong_fragment) << IsPartition << 1;
2501  break;
2502  }
2503  if (SeenError) {
2504  ExpectAndConsumeSemi(diag::err_module_expected_semi);
2505  return nullptr;
2506  }
2507 
2508  DeclResult Import;
2509  if (HeaderUnit)
2510  Import =
2511  Actions.ActOnModuleImport(StartLoc, ExportLoc, ImportLoc, HeaderUnit);
2512  else if (!Path.empty())
2513  Import = Actions.ActOnModuleImport(StartLoc, ExportLoc, ImportLoc, Path,
2514  IsPartition);
2515  ExpectAndConsumeSemi(diag::err_module_expected_semi);
2516  if (Import.isInvalid())
2517  return nullptr;
2518 
2519  // Using '@import' in framework headers requires modules to be enabled so that
2520  // the header is parseable. Emit a warning to make the user aware.
2521  if (IsObjCAtImport && AtLoc.isValid()) {
2522  auto &SrcMgr = PP.getSourceManager();
2523  auto FE = SrcMgr.getFileEntryRefForID(SrcMgr.getFileID(AtLoc));
2524  if (FE && llvm::sys::path::parent_path(FE->getDir().getName())
2525  .endswith(".framework"))
2526  Diags.Report(AtLoc, diag::warn_atimport_in_framework_header);
2527  }
2528 
2529  return Import.get();
2530 }
2531 
2532 /// Parse a C++ Modules TS / Objective-C module name (both forms use the same
2533 /// grammar).
2534 ///
2535 /// module-name:
2536 /// module-name-qualifier[opt] identifier
2537 /// module-name-qualifier:
2538 /// module-name-qualifier[opt] identifier '.'
2539 bool Parser::ParseModuleName(
2540  SourceLocation UseLoc,
2541  SmallVectorImpl<std::pair<IdentifierInfo *, SourceLocation>> &Path,
2542  bool IsImport) {
2543  // Parse the module path.
2544  while (true) {
2545  if (!Tok.is(tok::identifier)) {
2546  if (Tok.is(tok::code_completion)) {
2547  cutOffParsing();
2548  Actions.CodeCompleteModuleImport(UseLoc, Path);
2549  return true;
2550  }
2551 
2552  Diag(Tok, diag::err_module_expected_ident) << IsImport;
2553  SkipUntil(tok::semi);
2554  return true;
2555  }
2556 
2557  // Record this part of the module path.
2558  Path.push_back(std::make_pair(Tok.getIdentifierInfo(), Tok.getLocation()));
2559  ConsumeToken();
2560 
2561  if (Tok.isNot(tok::period))
2562  return false;
2563 
2564  ConsumeToken();
2565  }
2566 }
2567 
2568 /// Try recover parser when module annotation appears where it must not
2569 /// be found.
2570 /// \returns false if the recover was successful and parsing may be continued, or
2571 /// true if parser must bail out to top level and handle the token there.
2572 bool Parser::parseMisplacedModuleImport() {
2573  while (true) {
2574  switch (Tok.getKind()) {
2575  case tok::annot_module_end:
2576  // If we recovered from a misplaced module begin, we expect to hit a
2577  // misplaced module end too. Stay in the current context when this
2578  // happens.
2579  if (MisplacedModuleBeginCount) {
2580  --MisplacedModuleBeginCount;
2581  Actions.ActOnModuleEnd(Tok.getLocation(),
2582  reinterpret_cast<Module *>(
2583  Tok.getAnnotationValue()));
2584  ConsumeAnnotationToken();
2585  continue;
2586  }
2587  // Inform caller that recovery failed, the error must be handled at upper
2588  // level. This will generate the desired "missing '}' at end of module"
2589  // diagnostics on the way out.
2590  return true;
2591  case tok::annot_module_begin:
2592  // Recover by entering the module (Sema will diagnose).
2593  Actions.ActOnModuleBegin(Tok.getLocation(),
2594  reinterpret_cast<Module *>(
2595  Tok.getAnnotationValue()));
2596  ConsumeAnnotationToken();
2597  ++MisplacedModuleBeginCount;
2598  continue;
2599  case tok::annot_module_include:
2600  // Module import found where it should not be, for instance, inside a
2601  // namespace. Recover by importing the module.
2602  Actions.ActOnModuleInclude(Tok.getLocation(),
2603  reinterpret_cast<Module *>(
2604  Tok.getAnnotationValue()));
2605  ConsumeAnnotationToken();
2606  // If there is another module import, process it.
2607  continue;
2608  default:
2609  return false;
2610  }
2611  }
2612  return false;
2613 }
2614 
2615 bool BalancedDelimiterTracker::diagnoseOverflow() {
2616  P.Diag(P.Tok, diag::err_bracket_depth_exceeded)
2617  << P.getLangOpts().BracketDepth;
2618  P.Diag(P.Tok, diag::note_bracket_depth);
2619  P.cutOffParsing();
2620  return true;
2621 }
2622 
2624  const char *Msg,
2625  tok::TokenKind SkipToTok) {
2626  LOpen = P.Tok.getLocation();
2627  if (P.ExpectAndConsume(Kind, DiagID, Msg)) {
2628  if (SkipToTok != tok::unknown)
2629  P.SkipUntil(SkipToTok, Parser::StopAtSemi);
2630  return true;
2631  }
2632 
2633  if (getDepth() < P.getLangOpts().BracketDepth)
2634  return false;
2635 
2636  return diagnoseOverflow();
2637 }
2638 
2639 bool BalancedDelimiterTracker::diagnoseMissingClose() {
2640  assert(!P.Tok.is(Close) && "Should have consumed closing delimiter");
2641 
2642  if (P.Tok.is(tok::annot_module_end))
2643  P.Diag(P.Tok, diag::err_missing_before_module_end) << Close;
2644  else
2645  P.Diag(P.Tok, diag::err_expected) << Close;
2646  P.Diag(LOpen, diag::note_matching) << Kind;
2647 
2648  // If we're not already at some kind of closing bracket, skip to our closing
2649  // token.
2650  if (P.Tok.isNot(tok::r_paren) && P.Tok.isNot(tok::r_brace) &&
2651  P.Tok.isNot(tok::r_square) &&
2652  P.SkipUntil(Close, FinalToken,
2654  P.Tok.is(Close))
2655  LClose = P.ConsumeAnyToken();
2656  return true;
2657 }
2658 
2661  consumeClose();
2662 }
clang::Sema::ActOnModuleImport
DeclResult ActOnModuleImport(SourceLocation StartLoc, SourceLocation ExportLoc, SourceLocation ImportLoc, ModuleIdPath Path, bool IsPartition=false)
The parser has processed a module import declaration.
Definition: SemaModule.cpp:407
clang::Token::startToken
void startToken()
Reset all flags to cleared.
Definition: Token.h:170
clang::Sema::IER_Error
@ IER_Error
An error occurred.
Definition: Sema.h:5752
clang::DeclaratorChunk::FunctionTypeInfo::NumParams
unsigned NumParams
NumParams - This is the number of formal parameters specified by the declarator.
Definition: DeclSpec.h:1315
clang::UnqualifiedId
Represents a C++ unqualified-id that has been parsed.
Definition: DeclSpec.h:950
clang::Sema::CurContext
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:422
clang::Token::getAnnotationRange
SourceRange getAnnotationRange() const
SourceRange of the group of tokens that this annotation token represents.
Definition: Token.h:159
clang::OpaquePtr::get
PtrTy get() const
Definition: Ownership.h:80
clang::Sema::NC_FunctionTemplate
@ NC_FunctionTemplate
The name was classified as a function template name.
Definition: Sema.h:2514
clang::Sema::ActOnGlobalModuleFragmentDecl
DeclGroupPtrTy ActOnGlobalModuleFragmentDecl(SourceLocation ModuleLoc)
The parser has processed a global-module-fragment declaration that begins the definition of the globa...
Definition: SemaModule.cpp:75
clang::Sema::ModuleImportState::NotACXX20Module
@ NotACXX20Module
Not a C++20 TU, or an invalid state was found.
clang::Sema::MarkAsLateParsedTemplate
void MarkAsLateParsedTemplate(FunctionDecl *FD, Decl *FnD, CachedTokens &Toks)
Definition: SemaTemplate.cpp:10951
clang::ParsingDeclSpec
A class for parsing a DeclSpec.
Definition: RAIIObjectsForParser.h:175
clang::Scope::FunctionPrototypeScope
@ FunctionPrototypeScope
This is a scope that corresponds to the parameters within a function prototype.
Definition: Scope.h:81
clang::Sema::PCC_Namespace
@ PCC_Namespace
Code completion occurs at top-level or namespace context.
Definition: Sema.h:12640
clang::Sema::NC_NonType
@ NC_NonType
The name was classified as a specific non-type, non-template declaration.
Definition: Sema.h:2495
clang::Token::hasLeadingSpace
bool hasLeadingSpace() const
Return true if this token has whitespace before it.
Definition: Token.h:271
clang::DiagnosticBuilder
A little helper class used to produce diagnostics.
Definition: Diagnostic.h:1265
clang::TemplateIdAnnotation
Information about a template-id annotation token.
Definition: ParsedTemplate.h:149
clang::Scope::FnScope
@ FnScope
This indicates that the scope corresponds to a function, which means that labels are set here.
Definition: Scope.h:47
clang::Token::isObjCAtKeyword
bool isObjCAtKeyword(tok::ObjCKeywordKind objcKey) const
Return true if we have an ObjC keyword identifier.
Definition: Lexer.cpp:57
clang::DeclaratorContext::File
@ File
clang::DeclSpec::TST_enum
static const TST TST_enum
Definition: DeclSpec.h:283
clang::SourceRange
A trivial tuple used to represent a source range.
Definition: SourceLocation.h:210
clang::Sema::ActOnEndOfTranslationUnit
void ActOnEndOfTranslationUnit()
ActOnEndOfTranslationUnit - This is called at the very end of the translation unit when EOF is reache...
Definition: Sema.cpp:1117
clang::Preprocessor::setCodeCompletionHandler
void setCodeCompletionHandler(CodeCompletionHandler &Handler)
Set the code completion handler to the given object.
Definition: Preprocessor.h:1330
clang::Preprocessor::isIncrementalProcessingEnabled
bool isIncrementalProcessingEnabled() const
Returns true if incremental processing is enabled.
Definition: Preprocessor.h:1688
clang::FixItHint::CreateInsertion
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:97
clang::Preprocessor::Lex
void Lex(Token &Result)
Lex the next token for this preprocessor.
Definition: Preprocessor.cpp:892
clang::Parser::SkipUntil
bool SkipUntil(tok::TokenKind T, SkipUntilFlags Flags=static_cast< SkipUntilFlags >(0))
SkipUntil - Read tokens until we get to the specified token, then consume it (unless StopBeforeMatch ...
Definition: Parser.h:1217
clang::Sema::getASTContext
ASTContext & getASTContext() const
Definition: Sema.h:1614
clang::Sema::FnBodyKind
FnBodyKind
Definition: Sema.h:2909
clang::Decl::getAsFunction
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:218
clang::TemplateNameKind
TemplateNameKind
Specifies the kind of template name that an identifier refers to.
Definition: TemplateKinds.h:20
clang::DeclSpec::getAttributes
ParsedAttributes & getAttributes()
Definition: DeclSpec.h:795
llvm::SmallVector< Token, 4 >
clang::IdentifierTable::get
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
Definition: IdentifierTable.h:596
clang::Preprocessor::getMaxTokens
unsigned getMaxTokens() const
Get the max number of tokens before issuing a -Wmax-tokens warning.
Definition: Preprocessor.h:1104
clang::SourceLocation
Encodes a location in the source.
Definition: SourceLocation.h:86
clang::Sema::ModuleDeclKind::Interface
@ Interface
'export module X;'
clang::TNK_Undeclared_template
@ TNK_Undeclared_template
Lookup for the name failed, but we're assuming it was a template name anyway.
Definition: TemplateKinds.h:50
clang::SourceLocation::getLocWithOffset
SourceLocation getLocWithOffset(IntTy Offset) const
Return a source location with the specified offset from this SourceLocation.
Definition: SourceLocation.h:134
clang::Parser::ParseFirstTopLevelDecl
bool ParseFirstTopLevelDecl(DeclGroupPtrTy &Result, Sema::ModuleImportState &ImportState)
Parse the first top-level declaration in a translation unit.
Definition: Parser.cpp:584
clang::SourceRange::getBegin
SourceLocation getBegin() const
Definition: SourceLocation.h:219
clang::ParsingDeclSpec::complete
void complete(Decl *D)
Definition: RAIIObjectsForParser.h:190
IsCommonTypo
static bool IsCommonTypo(tok::TokenKind ExpectedTok, const Token &Tok)
Definition: Parser.cpp:102
clang::Token::getIdentifierInfo
IdentifierInfo * getIdentifierInfo() const
Definition: Token.h:178
clang::tok::getPunctuatorSpelling
const char * getPunctuatorSpelling(TokenKind Kind) LLVM_READNONE
Determines the spelling of simple punctuation tokens like '!' or '', and returns NULL for literal and...
Definition: TokenKinds.cpp:31
clang::Sema::PCC_ObjCImplementation
@ PCC_ObjCImplementation
Code completion occurs within an Objective-C implementation or category implementation.
Definition: Sema.h:12648
clang::Sema::getTypeName
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:286
clang::Token::setAnnotationEndLoc
void setAnnotationEndLoc(SourceLocation L)
Definition: Token.h:143
clang::Token::isAtStartOfLine
bool isAtStartOfLine() const
isAtStartOfLine - Return true if this token is at the start of a line.
Definition: Token.h:267
clang::Parser
Parser - This implements a parser for the C family of languages.
Definition: Parser.h:60
clang::Sema::FnBodyKind::Other
@ Other
C++ [dcl.fct.def.general]p1 function-body: ctor-initializer[opt] compound-statement function-try-bloc...
clang::Sema::CodeCompleteInPreprocessorConditionalExclusion
void CodeCompleteInPreprocessorConditionalExclusion(Scope *S)
Definition: SemaCodeComplete.cpp:9778
clang::DeclSpec::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
Definition: DeclSpec.h:506
clang::DeclSpec::SCS_unspecified
@ SCS_unspecified
Definition: DeclSpec.h:234
clang::Sema::CodeCompletePreprocessorExpression
void CodeCompletePreprocessorExpression()
Definition: SemaCodeComplete.cpp:9810
clang::DeclSpec::getParsedSpecifiers
unsigned getParsedSpecifiers() const
Return a bitmask of which flavors of specifiers this DeclSpec includes.
Definition: DeclSpec.cpp:452
RAIIObjectsForParser.h
clang::MacroInfo
Encapsulates the data about a macro definition (e.g.
Definition: MacroInfo.h:39
clang::Sema::ActOnPrivateModuleFragmentDecl
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:343
clang::Token::setIdentifierInfo
void setIdentifierInfo(IdentifierInfo *II)
Definition: Token.h:187
clang::Sema::NameClassification::getTemplateName
TemplateName getTemplateName() const
Definition: Sema.h:2612
DeclSpec.h
clang::Preprocessor::EnterToken
void EnterToken(const Token &Tok, bool IsReinject)
Enters a token in the token stream to be lexed next.
Definition: Preprocessor.h:1605
clang::CXXScopeSpec
Represents a C++ nested-name-specifier or a global scope specifier.
Definition: DeclSpec.h:64
clang::Token::setAnnotationRange
void setAnnotationRange(SourceRange R)
Definition: Token.h:162
clang::PrintingPolicy
Describes how types, statements, expressions, and declarations should be printed.
Definition: PrettyPrinter.h:57
clang::Sema::NameClassification::getKind
NameClassificationKind getKind() const
Definition: Sema.h:2595
clang::Sema::ModuleImportState::FirstDecl
@ FirstDecl
Parsing the first decl in a TU.
clang::Token
Token - This structure provides full information about a lexed token.
Definition: Token.h:34
clang::TemplateIdAnnotation::NumArgs
unsigned NumArgs
NumArgs - The number of template arguments.
Definition: ParsedTemplate.h:185
clang::BalancedDelimiterTracker
RAII class that helps handle the parsing of an open/close delimiter pair, such as braces { ....
Definition: RAIIObjectsForParser.h:385
clang::CommentHandler
Abstract base class that describes a handler that will receive source ranges for each of the comments...
Definition: Preprocessor.h:2610
clang::ParsingDeclarator::getMutableDeclSpec
ParsingDeclSpec & getMutableDeclSpec() const
Definition: RAIIObjectsForParser.h:212
clang::DeclSpec::getSpecifierName
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:542
clang::Preprocessor::isCodeCompletionReached
bool isCodeCompletionReached() const
Returns true if code-completion is enabled and we have hit the code-completion point.
Definition: Preprocessor.h:1731
clang::Declarator::getIdentifierLoc
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:2194
clang::Preprocessor::getIdentifierTable
IdentifierTable & getIdentifierTable()
Definition: Preprocessor.h:1001
clang::DeclSpec::getTypeSpecTypeLoc
SourceLocation getTypeSpecTypeLoc() const
Definition: DeclSpec.h:514
clang::DeclSpec::TSCS_unspecified
static const TSCS TSCS_unspecified
Definition: DeclSpec.h:247
clang::Scope::getParent
const Scope * getParent() const
getParent - Return the scope that this is nested in.
Definition: Scope.h:234
clang::TypeError
TypeResult TypeError()
Definition: Ownership.h:280
clang::Sema::ActOnTranslationUnitScope
void ActOnTranslationUnitScope(Scope *S)
Definition: Sema.cpp:123
clang::Sema::NC_Unknown
@ NC_Unknown
This name is not a type or template in this context, but might be something else.
Definition: Sema.h:2485
clang::ExprError
ExprResult ExprError()
Definition: Ownership.h:278
clang::Preprocessor::AnnotateCachedTokens
void AnnotateCachedTokens(const Token &Tok)
We notify the Preprocessor that if it is caching tokens (because backtrack is enabled) it should repl...
Definition: Preprocessor.h:1627
clang::AS_none
@ AS_none
Definition: Specifiers.h:112
clang::Sema::ActOnFinishFunctionBody
Decl * ActOnFinishFunctionBody(Decl *Decl, Stmt *Body)
Definition: SemaDecl.cpp:14808
clang::ParenBraceBracketBalancer
RAII object that makes sure paren/bracket/brace count is correct after declaration/statement parsing,...
Definition: RAIIObjectsForParser.h:343
clang::Sema::CheckForFunctionRedefinition
void CheckForFunctionRedefinition(FunctionDecl *FD, const FunctionDecl *EffectiveDefinition=nullptr, SkipBodyInfo *SkipBody=nullptr)
Definition: SemaDecl.cpp:14465
clang::Sema::CodeCompleteIncludedFile
void CodeCompleteIncludedFile(llvm::StringRef Dir, bool IsAngled)
Definition: SemaCodeComplete.cpp:9848
clang::Sema::ActOnModuleDecl
DeclGroupPtrTy ActOnModuleDecl(SourceLocation StartLoc, SourceLocation ModuleLoc, ModuleDeclKind MDK, ModuleIdPath Path, ModuleIdPath Partition, ModuleImportState &ImportState)
The parser has processed a module-declaration that begins the definition of a module interface or imp...
Definition: SemaModule.cpp:141
llvm::MutableArrayRef
Definition: LLVM.h:35
clang::Sema::ModuleImportState::ImportFinished
@ ImportFinished
after any non-import decl.
clang::Sema::NC_OverloadSet
@ NC_OverloadSet
The name was classified as an overload set, and an expression representing that overload set has been...
Definition: Sema.h:2508
clang::ASTContext::getExternalSource
ExternalASTSource * getExternalSource() const
Retrieve a pointer to the external AST source associated with this AST context, if any.
Definition: ASTContext.h:1183
clang::Preprocessor::SetPoisonReason
void SetPoisonReason(IdentifierInfo *II, unsigned DiagID)
Specifies the reason for poisoning an identifier.
Definition: Preprocessor.cpp:735
clang::Sema::SaveNestedNameSpecifierAnnotation
void * SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS)
Given a C++ nested-name-specifier, produce an annotation value that the parser can use later to recon...
Definition: SemaCXXScopeSpec.cpp:1012
clang::Module
Describes a module or submodule.
Definition: Module.h:96
clang::Preprocessor::TypoCorrectToken
void TypoCorrectToken(const Token &Tok)
Update the current token to represent the provided identifier, in order to cache an action performed ...
Definition: Preprocessor.h:1677
DeclTemplate.h
clang::Sema::SkipBodyInfo::ShouldSkip
bool ShouldSkip
Definition: Sema.h:2443
clang::Sema::CodeCompletePreprocessorDirective
void CodeCompletePreprocessorDirective(bool InConditional)
Definition: SemaCodeComplete.cpp:9608
clang::ImportDecl
Describes a module import declaration, which makes the contents of the named module visible in the cu...
Definition: Decl.h:4505
clang::Sema::NameClassification
Definition: Sema.h:2521
clang::Sema::PCC_Class
@ PCC_Class
Code completion occurs within a class, struct, or union.
Definition: Sema.h:12642
clang::DeclSpec::getTypeSpecType
TST getTypeSpecType() const
Definition: DeclSpec.h:476
Id
int Id
Definition: ASTDiff.cpp:191
clang::Sema::CodeCompleteObjCMethodDecl
void CodeCompleteObjCMethodDecl(Scope *S, Optional< bool > IsInstanceMethod, ParsedType ReturnType)
Definition: SemaCodeComplete.cpp:9347
clang::Scope
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:40
clang::Parser::ParseUnqualifiedId
bool ParseUnqualifiedId(CXXScopeSpec &SS, ParsedType ObjectType, bool ObjectHadErrors, bool EnteringContext, bool AllowDestructorName, bool AllowConstructorName, bool AllowDeductionGuide, SourceLocation *TemplateKWLoc, UnqualifiedId &Result)
Parse a C++ unqualified-id (or a C identifier), which describes the name of an entity.
Definition: ParseExprCXX.cpp:2789
clang::TemplateIdAnnotation::RAngleLoc
SourceLocation RAngleLoc
The location of the '>' after the template argument list.
Definition: ParsedTemplate.h:182
clang::Parser::SkipUntilFlags
SkipUntilFlags
Control flags for SkipUntil functions.
Definition: Parser.h:1195
clang::DeclSpec::TST_interface
static const TST TST_interface
Definition: DeclSpec.h:286
clang::SourceRange::getEnd
SourceLocation getEnd() const
Definition: SourceLocation.h:220
clang::DeclaratorChunk::FunctionTypeInfo::isKNRPrototype
bool isKNRPrototype() const
isKNRPrototype - Return true if this is a K&R style identifier list, like "void foo(a,...
Definition: DeclSpec.h:1420
clang::Parser::StopAtCodeCompletion
@ StopAtCodeCompletion
Stop at code completion.
Definition: Parser.h:1199
clang::Preprocessor::addCommentHandler
void addCommentHandler(CommentHandler *Handler)
Add the specified comment handler to the preprocessor.
Definition: Preprocessor.cpp:1388
clang::Token::getKind
tok::TokenKind getKind() const
Definition: Token.h:92
clang::MultiTemplateParamsArg
MutableArrayRef< TemplateParameterList * > MultiTemplateParamsArg
Definition: Ownership.h:276
clang::Sema::ActOnSkippedFunctionBody
Decl * ActOnSkippedFunctionBody(Decl *Decl)
Definition: SemaDecl.cpp:14798
clang::CPlusPlus
@ CPlusPlus
Definition: LangStandard.h:53
clang::Token::getAnnotationValue
void * getAnnotationValue() const
Definition: Token.h:225
clang::Sema::PCC_RecoveryInFunction
@ PCC_RecoveryInFunction
Code completion occurs within the body of a function on a recovery path, where we do not have a speci...
Definition: Sema.h:12672
clang::BalancedDelimiterTracker::expectAndConsume
bool expectAndConsume(unsigned DiagID=diag::err_expected, const char *Msg="", tok::TokenKind SkipToTok=tok::unknown)
Definition: Parser.cpp:2623
clang::Sema::IER_DoesNotExist
@ IER_DoesNotExist
The symbol does not exist.
Definition: Sema.h:5745
clang::DeclaratorChunk::FunctionTypeInfo
Definition: DeclSpec.h:1276
clang::DeclSpec::ClearStorageClassSpecs
void ClearStorageClassSpecs()
Definition: DeclSpec.h:454
clang::Scope::Init
void Init(Scope *parent, unsigned flags)
Init - This is used by the parser to implement scope caching.
Definition: Scope.cpp:87
clang::Parser::StopBeforeMatch
@ StopBeforeMatch
Stop skipping at specified token, but don't skip the token itself.
Definition: Parser.h:1198
clang::Scope::CompoundStmtScope
@ CompoundStmtScope
This is a compound statement scope.
Definition: Scope.h:130
clang::Scope::FunctionDeclarationScope
@ FunctionDeclarationScope
This is a scope that corresponds to the parameters within a function prototype for a function declara...
Definition: Scope.h:87
clang::Sema::NameClassification::getExpression
ExprResult getExpression() const
Definition: Sema.h:2597
clang::Sema::Initialize
void Initialize()
Perform initialization that occurs after the parser has been initialized but before it parses anythin...
Definition: Sema.cpp:278
clang::Parser::SkipMalformedDecl
void SkipMalformedDecl()
SkipMalformedDecl - Read tokens until we get to some likely good stopping point for skipping past a s...
Definition: ParseDecl.cpp:1935
clang::DeclSpec::TST_class
static const TST TST_class
Definition: DeclSpec.h:287
clang::Preprocessor::Diag
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID) const
Forwarding function for diagnostics.
Definition: Preprocessor.h:1806
clang::Parser::ExitScope
void ExitScope()
ExitScope - Pop a scope off the scope stack.
Definition: Parser.cpp:415
clang::Parser::getLangOpts
const LangOptions & getLangOpts() const
Definition: Parser.h:440
clang::Sema::ClassifyName
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:862
clang::DeclSpec::hasTagDefinition
bool hasTagDefinition() const
Definition: DeclSpec.cpp:443
clang::Token::is
bool is(tok::TokenKind K) const
is/isNot - Predicates to check if this token is a specific kind, as in "if (Tok.is(tok::l_brace)) {....
Definition: Token.h:97
clang::Sema::ModuleImportState::GlobalFragment
@ GlobalFragment
after 'module;' but before 'module X;'
clang::Sema::ModuleDeclKind::Implementation
@ Implementation
'module X;'
clang::Parser::ConsumeAnyToken
SourceLocation ConsumeAnyToken(bool ConsumeCodeCompletionTok=false)
ConsumeAnyToken - Dispatch to the right Consume* method based on the current token type.
Definition: Parser.h:518
clang::Preprocessor::isBacktrackEnabled
bool isBacktrackEnabled() const
True if EnableBacktrackAtThisPos() was called and caching of tokens is on.
Definition: Preprocessor.h:1491
clang::DeclContext::isTranslationUnit
bool isTranslationUnit() const
Definition: DeclBase.h:1951
clang::Sema::SetFunctionBodyKind
void SetFunctionBodyKind(Decl *D, SourceLocation Loc, FnBodyKind BodyKind)
Definition: SemaDeclCXX.cpp:17399
clang::Sema::NC_DependentNonType
@ NC_DependentNonType
The name denotes a member of a dependent type that could not be resolved.
Definition: Sema.h:2503
clang::Parser::TryAnnotateCXXScopeToken
bool TryAnnotateCXXScopeToken(bool EnteringContext=false)
TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only annotates C++ scope specifiers and ...
Definition: Parser.cpp:2109
clang::ParsedAttr
ParsedAttr - Represents a syntactic attribute.
Definition: ParsedAttr.h:234
clang::SourceManager::getFileID
FileID getFileID(SourceLocation SpellingLoc) const
Return the FileID for a SourceLocation.
Definition: SourceManager.h:1108
clang::Token::setAnnotationValue
void setAnnotationValue(void *val)
Definition: Token.h:229
clang::ParsingDeclarator::complete
void complete(Decl *D)
Definition: RAIIObjectsForParser.h:221
clang::Sema::NameClassification::getNonTypeDecl
NamedDecl * getNonTypeDecl() const
Definition: Sema.h:2607
clang::Sema::CodeCompleteOrdinaryName
void CodeCompleteOrdinaryName(Scope *S, ParserCompletionContext CompletionContext)
Definition: SemaCodeComplete.cpp:4286
clang::Sema::ActOnModuleInclude
void ActOnModuleInclude(SourceLocation DirectiveLoc, Module *Mod)
The parser has processed a module import translated from a include or similar preprocessing directive...
Definition: SemaModule.cpp:561
clang::TemplateIdAnnotation::Kind
TemplateNameKind Kind
The kind of template that Template refers to.
Definition: ParsedTemplate.h:174
ASTContext.h
clang::Declarator::setFunctionDefinitionKind
void setFunctionDefinitionKind(FunctionDefinitionKind Val)
Definition: DeclSpec.h:2572
clang::Sema::SkipBodyInfo
Definition: Sema.h:2439
clang::DeclSpec::getStorageClassSpec
SCS getStorageClassSpec() const
Definition: DeclSpec.h:440
clang::SourceLocation::isFileID
bool isFileID() const
Definition: SourceLocation.h:102
clang::Parser::MightBeCXXScopeToken
bool MightBeCXXScopeToken()
Definition: Parser.h:859
clang::DeclSpec::TST_union
static const TST TST_union
Definition: DeclSpec.h:284
clang::Sema::CheckMicrosoftIfExistsSymbol
IfExistsResult CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, const DeclarationNameInfo &TargetNameInfo)
Definition: SemaExprCXX.cpp:8813
clang::DeclSpec::SCS_register
@ SCS_register
Definition: DeclSpec.h:239
clang::Parser::getCurScope
Scope * getCurScope() const
Definition: Parser.h:447
clang::DeclaratorChunk::FunctionTypeInfo::Params
ParamInfo * Params
Params - This is a pointer to a new[]'d array of ParamInfo objects that describe the parameters speci...
Definition: DeclSpec.h:1340
clang::Sema::CodeCompleteModuleImport
void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path)
Definition: SemaCodeComplete.cpp:4238
clang::Parser::Diag
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Definition: Parser.cpp:73
clang::Token::isNot
bool isNot(tok::TokenKind K) const
Definition: Token.h:98
clang::DeclSpec::getThreadStorageClassSpecLoc
SourceLocation getThreadStorageClassSpecLoc() const
Definition: DeclSpec.h:450
getKind
static Decl::Kind getKind(const Decl *D)
Definition: DeclBase.cpp:1008
clang::Declarator::isFunctionDeclarator
bool isFunctionDeclarator(unsigned &idx) const
isFunctionDeclarator - This method returns true if the declarator is a function declarator (looking t...
Definition: DeclSpec.h:2298
clang::Sema::CodeCompleteNaturalLanguage
void CodeCompleteNaturalLanguage()
Definition: SemaCodeComplete.cpp:9990
clang::Parser::ParseStringLiteralExpression
ExprResult ParseStringLiteralExpression(bool AllowUserDefinedLiteral=false)
clang::DeclaratorChunk::ParamInfo::Param
Decl * Param
Definition: DeclSpec.h:1254
clang::Parser::StopAtSemi
@ StopAtSemi
Stop skipping at semicolon.
Definition: Parser.h:1196
clang::Parser::ObjCDeclContextSwitch
friend class ObjCDeclContextSwitch
Definition: Parser.h:65
clang::Declarator::SetRangeBegin
void SetRangeBegin(SourceLocation Loc)
SetRangeBegin - Set the start of the source range to Loc, unless it's invalid.
Definition: DeclSpec.h:1952
clang::ASTConsumer::HandleTopLevelDecl
virtual bool HandleTopLevelDecl(DeclGroupRef D)
HandleTopLevelDecl - Handle the specified top-level declaration.
Definition: ASTConsumer.cpp:18
clang::Sema::ConvertDeclToDeclGroup
DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType=nullptr)
Definition: SemaDecl.cpp:57
clang::Sema::ActOnTypenameType
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".
Definition: SemaTemplate.cpp:10384
clang::Type::isObjCObjectPointerType
bool isObjCObjectPointerType() const
Definition: Type.h:6876
clang::Sema::ActOnFinishKNRParamDeclarations
void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, SourceLocation LocAfterDecls)
Definition: SemaDecl.cpp:14324
clang::OpaquePtr
Wrapper for void* pointer.
Definition: Ownership.h:50
clang::Sema::NameClassification::getTemplateNameKind
TemplateNameKind getTemplateNameKind() const
Definition: Sema.h:2619
clang::DeclSpec::TST_int
static const TST TST_int
Definition: DeclSpec.h:267
clang::TemplateIdAnnotation::LAngleLoc
SourceLocation LAngleLoc
The location of the '<' before the template argument list.
Definition: ParsedTemplate.h:178
clang::DeclSpec::getStorageClassSpecLoc
SourceLocation getStorageClassSpecLoc() const
Definition: DeclSpec.h:449
clang::Preprocessor::getSourceManager
SourceManager & getSourceManager() const
Definition: Preprocessor.h:998
IsHeaderFile
static bool IsHeaderFile(const std::string &Filename)
Definition: RewriteModernObjC.cpp:629
clang::Sema::canDelayFunctionBody
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:14756
clang::AccessSpecifier
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:108
clang::Preprocessor::getSpelling
StringRef getSpelling(SourceLocation loc, SmallVectorImpl< char > &buffer, bool *invalid=nullptr) const
Return the 'spelling' of the token at the given location; does not go up to the spelling location or ...
Definition: Preprocessor.h:1821
clang::Preprocessor::getTokenCount
unsigned getTokenCount() const
Get the number of tokens processed so far.
Definition: Preprocessor.h:1101
clang::Sema::IER_Dependent
@ IER_Dependent
The name is a dependent name, so the results will differ from one instantiation to the next.
Definition: Sema.h:5749
clang::tok::TokenKind
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:25
clang::Sema::ModuleImportState
ModuleImportState
An enumeration to represent the transition of states in parsing module fragments and imports.
Definition: Sema.h:3001
clang::TemplateIdAnnotation::TemplateNameLoc
SourceLocation TemplateNameLoc
TemplateNameLoc - The location of the template name within the source.
Definition: ParsedTemplate.h:159
clang::Declarator::getFunctionTypeInfo
DeclaratorChunk::FunctionTypeInfo & getFunctionTypeInfo()
getFunctionTypeInfo - Retrieves the function type info object (looking through parentheses).
Definition: DeclSpec.h:2329
clang::Parser::ConsumeToken
SourceLocation ConsumeToken()
ConsumeToken - Consume the current 'peek token' and lex the next one.
Definition: Parser.h:490
clang::Preprocessor::hadModuleLoaderFatalFailure
bool hadModuleLoaderFatalFailure() const
Definition: Preprocessor.h:1018
false
#define false
Definition: stdbool.h:22
clang::DeclSpec::isDeclRep
static bool isDeclRep(TST T)
Definition: DeclSpec.h:416
clang::TemplateIdAnnotation::mightBeType
bool mightBeType() const
Determine whether this might be a type template.
Definition: ParsedTemplate.h:223
clang::ParsingDeclSpec::abort
void abort()
Definition: RAIIObjectsForParser.h:194
clang::ActionResult::get
PtrTy get() const
Definition: Ownership.h:169
clang::TNK_Type_template
@ TNK_Type_template
The name refers to a template whose specialization produces a type.
Definition: TemplateKinds.h:30
clang::Sema::NC_TypeTemplate
@ NC_TypeTemplate
The name was classified as a template whose specializations are types.
Definition: Sema.h:2510
clang::TemplateName
Represents a C++ template name within the type system.
Definition: TemplateName.h:192
clang::Preprocessor::isCodeCompletionEnabled
bool isCodeCompletionEnabled() const
Determine if we are performing code completion.
Definition: Preprocessor.h:1713
clang::ASTContext::getPrintingPolicy
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:708
llvm::ArrayRef
Definition: LLVM.h:34
clang::Decl
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:83
clang::ParsingDeclarator::getDeclSpec
const ParsingDeclSpec & getDeclSpec() const
Definition: RAIIObjectsForParser.h:208
Scope.h
clang::Parser::~Parser
~Parser() override
Definition: Parser.cpp:454
clang::Parser::EnterScope
void EnterScope(unsigned ScopeFlags)
EnterScope - Start a new scope.
Definition: Parser.cpp:404
clang::Parser::DeclGroupPtrTy
OpaquePtr< DeclGroupRef > DeclGroupPtrTy
Definition: Parser.h:458
clang::Sema::ActOnComment
void ActOnComment(SourceRange Comment)
Definition: Sema.cpp:2347
clang::Sema
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:354
clang::ActionResult::isInvalid
bool isInvalid() const
Definition: Ownership.h:165
clang::Parser::TryAnnotateTypeOrScopeTokenAfterScopeSpec
bool TryAnnotateTypeOrScopeTokenAfterScopeSpec(CXXScopeSpec &SS, bool IsNewScope)
Try to annotate a type or scope token, having already parsed an optional scope specifier.
Definition: Parser.cpp:1995
clang::Sema::NC_Type
@ NC_Type
The name was classified as a type.
Definition: Sema.h:2491
clang::FunctionDefinitionKind::Definition
@ Definition
clang::Parser::ParseTopLevelDecl
bool ParseTopLevelDecl()
Definition: Parser.h:479
ASTConsumer.h
clang::Parser::TryConsumeToken
bool TryConsumeToken(tok::TokenKind Expected)
Definition: Parser.h:498
clang::ParsedAttributes
ParsedAttributes - A collection of parsed attributes.
Definition: ParsedAttr.h:995
clang::Sema::NameClassification::getType
ParsedType getType() const
Definition: Sema.h:2602
clang::PoisonSEHIdentifiersRAIIObject
Definition: RAIIObjectsForParser.h:359
clang::Sema::ActOnFileScopeAsmDecl
Decl * ActOnFileScopeAsmDecl(Expr *expr, SourceLocation AsmLoc, SourceLocation RParenLoc)
Definition: SemaDecl.cpp:18966
clang::Parser::Initialize
void Initialize()
Initialize - Warm up the parser.
Definition: Parser.cpp:474
clang::IdentifierInfo
One of these records is kept for each identifier that is lexed.
Definition: IdentifierTable.h:84
clang::Sema::NC_UndeclaredTemplate
@ NC_UndeclaredTemplate
The name was classified as an ADL-only function template name.
Definition: Sema.h:2516
clang::Sema::ActOnStartOfTranslationUnit
void ActOnStartOfTranslationUnit()
This is called before the very first declaration in the translation unit is parsed.
Definition: Sema.cpp:1033
clang::Token::getLocation
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file.
Definition: Token.h:125
clang::Token::isEditorPlaceholder
bool isEditorPlaceholder() const
Returns true if this token is an editor placeholder.
Definition: Token.h:309
clang::Sema::NC_Concept
@ NC_Concept
The name was classified as a concept name.
Definition: Sema.h:2518
clang::OpaquePtr< TemplateName >::make
static OpaquePtr make(TemplateName P)
Definition: Ownership.h:60
clang::SourceLocation::isMacroID
bool isMacroID() const
Definition: SourceLocation.h:103
clang::Sema::BuildDeclaratorGroup
DeclGroupPtrTy BuildDeclaratorGroup(MutableArrayRef< Decl * > Group)
BuildDeclaratorGroup - convert a list of declarations into a declaration group, performing any necess...
Definition: SemaDecl.cpp:13958
clang::ObjCPropertyAttribute::Kind
Kind
Definition: DeclObjCCommon.h:22
clang::Token::isAnnotation
bool isAnnotation() const
Return true if this is any of tok::annot_* kind tokens.
Definition: Token.h:119
clang::Sema::FnBodyKind::Delete
@ Delete
= delete ;
clang::Preprocessor::removeCommentHandler
void removeCommentHandler(CommentHandler *Handler)
Remove the specified comment handler.
Definition: Preprocessor.cpp:1395
clang::ActionResult< Expr * >
clang::Type::isObjCObjectType
bool isObjCObjectType() const
Definition: Type.h:6880
clang::ExtensionRAIIObject
ExtensionRAIIObject - This saves the state of extension warnings when constructed and disables them.
Definition: RAIIObjectsForParser.h:252
clang::Decl::getBody
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:1019
clang::Token::setLocation
void setLocation(SourceLocation L)
Definition: Token.h:133
clang::Sema::ModuleImportState::ImportAllowed
@ ImportAllowed
after 'module X;' but before any non-import decl.
clang::Sema::ActOnModuleEnd
void ActOnModuleEnd(SourceLocation DirectiveLoc, Module *Mod)
The parser has left a submodule.
Definition: SemaModule.cpp:626
clang::DeclSpec::TST_unspecified
static const TST TST_unspecified
Definition: DeclSpec.h:260
clang::TemplateIdAnnotation::TemplateKWLoc
SourceLocation TemplateKWLoc
TemplateKWLoc - The location of the template keyword.
Definition: ParsedTemplate.h:155
clang::DeclSpec::takeAttributesFrom
void takeAttributesFrom(ParsedAttributes &attrs)
Definition: DeclSpec.h:798
clang::Module::Kind
ModuleKind Kind
The kind of this module.
Definition: Module.h:129
clang::Sema::NC_Keyword
@ NC_Keyword
The name has been typo-corrected to a keyword.
Definition: Sema.h:2489
clang::SourceLocation::isInvalid
bool isInvalid() const
Definition: SourceLocation.h:111
clang::Preprocessor::clearCodeCompletionHandler
void clearCodeCompletionHandler()
Clear out the code completion handler.
Definition: Preprocessor.h:1340
clang::BalancedDelimiterTracker::skipToEnd
void skipToEnd()
Definition: Parser.cpp:2659
clang
Definition: CalledOnceCheck.h:17
clang::Preprocessor::getMaxTokensOverrideLoc
SourceLocation getMaxTokensOverrideLoc() const
Definition: Preprocessor.h:1111
clang::Sema::NC_UndeclaredNonType
@ NC_UndeclaredNonType
The name was classified as an ADL-only function name.
Definition: Sema.h:2499
clang::TemplateIdAnnotation::Name
IdentifierInfo * Name
FIXME: Temporarily stores the name of a specialization.
Definition: ParsedTemplate.h:162
clang::Parser::TryAnnotateTypeOrScopeToken
bool TryAnnotateTypeOrScopeToken()
TryAnnotateTypeOrScopeToken - If the current token position is on a typename (possibly qualified in C...
Definition: Parser.cpp:1880
clang::Stmt
Stmt - This represents one statement.
Definition: Stmt.h:69
clang::TemplateIdAnnotation::getTemplateArgs
ParsedTemplateArgument * getTemplateArgs()
Retrieves a pointer to the template arguments.
Definition: ParsedTemplate.h:192
clang::Sema::IER_Exists
@ IER_Exists
The symbol exists.
Definition: Sema.h:5742
clang::Declarator
Information about one declarator, including the parsed type information and the identifier.
Definition: DeclSpec.h:1803
clang::Sema::FnBodyKind::Default
@ Default
= default ;
clang::Sema::CodeCompletePreprocessorMacroName
void CodeCompletePreprocessorMacroName(bool IsDefinition)
Definition: SemaCodeComplete.cpp:9783
clang::SourceLocation::isValid
bool isValid() const
Return true if this is a valid SourceLocation object.
Definition: SourceLocation.h:110
clang::CorrectionCandidateCallback
Base class for callback objects used by Sema::CorrectTypo to check the validity of a potential typo c...
Definition: TypoCorrection.h:281
clang::FixItHint::CreateRemoval
static FixItHint CreateRemoval(CharSourceRange RemoveRange)
Create a code modification hint that removes the given source range.
Definition: Diagnostic.h:123
clang::Sema::ActOnDefaultCtorInitializers
void ActOnDefaultCtorInitializers(Decl *CDtorDecl)
Definition: SemaDeclCXX.cpp:5749
clang::Preprocessor::getLocForEndOfToken
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset=0)
Computes the source location just past the end of the token at this source location.
Definition: Preprocessor.h:1930
clang::Token::setKind
void setKind(tok::TokenKind K)
Definition: Token.h:93
ParseDiagnostic.h
clang::BalancedDelimiterTracker::consumeClose
bool consumeClose()
Definition: RAIIObjectsForParser.h:446
clang::TemplateIdAnnotation::isInvalid
bool isInvalid() const
Definition: ParsedTemplate.h:233
clang::Sema::ModuleImportState::PrivateFragment
@ PrivateFragment
after 'module :private;'.
clang::Token::isOneOf
bool isOneOf(tok::TokenKind K1, tok::TokenKind K2) const
Definition: Token.h:99
clang::DeclaratorContext::KNRTypeList
@ KNRTypeList
clang::Token::getLastLoc
SourceLocation getLastLoc() const
Definition: Token.h:148
clang::DeclSpec::TST_struct
static const TST TST_struct
Definition: DeclSpec.h:285
clang::Sema::CodeCompletePreprocessorMacroArgument
void CodeCompletePreprocessorMacroArgument(Scope *S, IdentifierInfo *Macro, MacroInfo *MacroInfo, unsigned Argument)
Definition: SemaCodeComplete.cpp:9834
clang::SourceManager::getFileEntryRefForID
Optional< FileEntryRef > getFileEntryRefForID(FileID FID) const
Returns the FileEntryRef for the provided FileID.
Definition: SourceManager.h:1042
clang::Sema::SetLateTemplateParser
void SetLateTemplateParser(LateTemplateParserCB *LTP, LateTemplateParserCleanupCB *LTPCleanup, void *P)
Definition: Sema.h:914
clang::CPlusPlus11
@ CPlusPlus11
Definition: LangStandard.h:54
clang::ParsingDeclarator
A class for parsing a declarator.
Definition: RAIIObjectsForParser.h:200
clang::comments::tok::eof
@ eof
Definition: CommentLexer.h:33
llvm::SmallVectorImpl
Definition: Randstruct.h:18
clang::Scope::DeclScope
@ DeclScope
This is a scope that can contain a declaration.
Definition: Scope.h:59
FileManager.h
clang::Sema::HandleDeclarator
NamedDecl * HandleDeclarator(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParameterLists)
Definition: SemaDecl.cpp:6032
clang::DeclSpec::isEmpty
bool isEmpty() const
isEmpty - Return true if this declaration specifier is completely empty: no tokens were parsed in the...
Definition: DeclSpec.h:634
true
#define true
Definition: stdbool.h:21
clang::Preprocessor
Engages in a tight little dance with the lexer to efficiently preprocess tokens.
Definition: Preprocessor.h:131
clang::CXXScopeSpec::isEmpty
bool isEmpty() const
No scope specifier.
Definition: DeclSpec.h:190
clang::IdentifierInfo::revertTokenIDToIdentifier
void revertTokenIDToIdentifier()
Revert TokenID to tok::identifier; used for GNU libstdc++ 4.2 compatibility.
Definition: IdentifierTable.h:272
clang::Declarator::getAttributes
const ParsedAttributes & getAttributes() const
Definition: DeclSpec.h:2523
clang::CXXScopeSpec::getRange
SourceRange getRange() const
Definition: DeclSpec.h:69
clang::Sema::canSkipFunctionBody
bool canSkipFunctionBody(Decl *D)
Determine whether we can skip parsing the body of a function definition, assuming we don't care about...
Definition: SemaDecl.cpp:14780
clang::CXXScopeSpec::getBeginLoc
SourceLocation getBeginLoc() const
Definition: DeclSpec.h:73
clang::Sema::NC_VarTemplate
@ NC_VarTemplate
The name was classified as a variable template name.
Definition: Sema.h:2512
clang::IdentifierLoc
Wraps an identifier and optional source location for the identifier.
Definition: ParsedAttr.h:212
clang::Parser::NextToken
const Token & NextToken()
NextToken - This peeks ahead one token and returns it without consuming it.
Definition: Parser.h:805
clang::Sema::ActOnStartOfFunctionDef
Decl * ActOnStartOfFunctionDef(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParamLists, SkipBodyInfo *SkipBody=nullptr, FnBodyKind BodyKind=FnBodyKind::Other)
Definition: SemaDecl.cpp:14371
clang::Sema::ModuleDeclKind
ModuleDeclKind
Definition: Sema.h:2991
clang::Sema::ActOnPopScope
void ActOnPopScope(SourceLocation Loc, Scope *S)
Scope actions.
Definition: SemaDecl.cpp:2096
clang::Parser::Parser
Parser(Preprocessor &PP, Sema &Actions, bool SkipFunctionBodies)
Definition: Parser.cpp:51
clang::Sema::NC_Error
@ NC_Error
Classification failed; an error has been produced.
Definition: Sema.h:2487
clang::Sema::isTemplateName
TemplateNameKind isTemplateName(Scope *S, CXXScopeSpec &SS, bool hasTemplateKeyword, const UnqualifiedId &Name, ParsedType ObjectType, bool EnteringContext, TemplateTy &Template, bool &MemberOfUnknownSpecialization, bool Disambiguation=false)
Definition: SemaTemplate.cpp:172
clang::FunctionDecl
Represents a function declaration or definition.
Definition: Decl.h:1872
clang::DeclaratorChunk::ParamInfo::Ident
IdentifierInfo * Ident
Definition: DeclSpec.h:1252
clang::RecordDecl
Represents a struct/union/class.
Definition: Decl.h:3901
clang::TemplateIdAnnotation::Template
ParsedTemplateTy Template
The declaration of the template corresponding to the template-name.
Definition: ParsedTemplate.h:169
clang::Parser::TemplateParameterLists
SmallVector< TemplateParameterList *, 4 > TemplateParameterLists
Definition: Parser.h:461
clang::Preprocessor::RevertCachedTokens
void RevertCachedTokens(unsigned N)
When backtracking is enabled and tokens are cached, this allows to revert a specific number of tokens...
Definition: Preprocessor.h:1589
clang::ActionResult::isUsable
bool isUsable() const
Definition: Ownership.h:166
clang::CXXScopeSpec::isNotEmpty
bool isNotEmpty() const
A scope specifier is present, but may be valid or invalid.
Definition: DeclSpec.h:192
clang::DeclSpec::SetTypeSpecType
bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, unsigned &DiagID, const PrintingPolicy &Policy)
Definition: DeclSpec.cpp:824
clang::Preprocessor::getIdentifierInfo
IdentifierInfo * getIdentifierInfo(StringRef Name) const
Return information about the specified preprocessor identifier token.
Definition: Preprocessor.h:1290
clang::FixItHint::CreateReplacement
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:134
HasFlagsSet
static bool HasFlagsSet(Parser::SkipUntilFlags L, Parser::SkipUntilFlags R)
Definition: Parser.cpp:266
clang::Sema::ActOnParamDeclarator
Decl * ActOnParamDeclarator(Scope *S, Declarator &D)
ActOnParamDeclarator - Called from Parser::ParseFunctionDeclarator() to introduce parameters into fun...
Definition: SemaDecl.cpp:14074
clang::DeclSpec
Captures information about "declaration specifiers".
Definition: DeclSpec.h:229
clang::Sema::ActOnModuleBegin
void ActOnModuleBegin(SourceLocation DirectiveLoc, Module *Mod)
The parsed has entered a submodule.
Definition: SemaModule.cpp:602
clang::DeclSpec::SCS_extern
@ SCS_extern
Definition: DeclSpec.h:236
clang::DiagnosticsEngine::Report
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1536
ParsedTemplate.h
clang::Sema::ParsedFreeStandingDeclSpec
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:4661
clang::CXXScopeSpec::isInvalid
bool isInvalid() const
An error occurred during parsing of the scope specifier.
Definition: DeclSpec.h:195
clang::TypeSpecifierType
TypeSpecifierType
Specifies the kind of type.
Definition: Specifiers.h:52
clang::Sema::getASTConsumer
ASTConsumer & getASTConsumer() const
Definition: Sema.h:1615
clang::DeclSpec::PQ_StorageClassSpecifier
@ PQ_StorageClassSpecifier
Definition: DeclSpec.h:319
Parser.h
clang::Sema::ActOnEmptyDeclaration
Decl * ActOnEmptyDeclaration(Scope *S, const ParsedAttributesView &AttrList, SourceLocation SemiLoc)
Handle a C++11 empty-declaration and attribute-declaration.
Definition: SemaDeclCXX.cpp:16334
clang::DeclSpec::getThreadStorageClassSpec
TSCS getThreadStorageClassSpec() const
Definition: DeclSpec.h:441