1 //===--- Parser.cpp - C Language Family Parser ----------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Parser interfaces.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Parse/Parser.h"
15 #include "ParsePragma.h"
16 #include "RAIIObjectsForParser.h"
17 #include "clang/AST/ASTConsumer.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/Parse/ParseDiagnostic.h"
20 #include "clang/Sema/DeclSpec.h"
21 #include "clang/Sema/ParsedTemplate.h"
22 #include "clang/Sema/Scope.h"
23 #include "llvm/Support/raw_ostream.h"
24 using namespace clang;
28 /// \brief A comment handler that passes comments found by the preprocessor
29 /// to the parser action.
30 class ActionCommentHandler : public CommentHandler {
34 explicit ActionCommentHandler(Sema &S) : S(S) { }
36 virtual bool HandleComment(Preprocessor &PP, SourceRange Comment) {
37 S.ActOnComment(Comment);
41 } // end anonymous namespace
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");
51 Parser::Parser(Preprocessor &pp, Sema &actions, bool skipFunctionBodies)
52 : PP(pp), Actions(actions), Diags(PP.getDiagnostics()),
53 GreaterThanIsOperator(true), ColonIsSacred(false),
54 InMessageExpression(false), TemplateParameterDepth(0),
55 ParsingInObjCContainer(false) {
56 SkipFunctionBodies = pp.isCodeCompletionEnabled() || skipFunctionBodies;
58 Tok.setKind(tok::eof);
61 ParenCount = BracketCount = BraceCount = 0;
62 CurParsedObjCImpl = 0;
64 // Add #pragma handlers. These are removed and destroyed in the
66 AlignHandler.reset(new PragmaAlignHandler());
67 PP.AddPragmaHandler(AlignHandler.get());
69 GCCVisibilityHandler.reset(new PragmaGCCVisibilityHandler());
70 PP.AddPragmaHandler("GCC", GCCVisibilityHandler.get());
72 OptionsHandler.reset(new PragmaOptionsHandler());
73 PP.AddPragmaHandler(OptionsHandler.get());
75 PackHandler.reset(new PragmaPackHandler());
76 PP.AddPragmaHandler(PackHandler.get());
78 MSStructHandler.reset(new PragmaMSStructHandler());
79 PP.AddPragmaHandler(MSStructHandler.get());
81 UnusedHandler.reset(new PragmaUnusedHandler());
82 PP.AddPragmaHandler(UnusedHandler.get());
84 WeakHandler.reset(new PragmaWeakHandler());
85 PP.AddPragmaHandler(WeakHandler.get());
87 RedefineExtnameHandler.reset(new PragmaRedefineExtnameHandler());
88 PP.AddPragmaHandler(RedefineExtnameHandler.get());
90 FPContractHandler.reset(new PragmaFPContractHandler());
91 PP.AddPragmaHandler("STDC", FPContractHandler.get());
93 if (getLangOpts().OpenCL) {
94 OpenCLExtensionHandler.reset(new PragmaOpenCLExtensionHandler());
95 PP.AddPragmaHandler("OPENCL", OpenCLExtensionHandler.get());
97 PP.AddPragmaHandler("OPENCL", FPContractHandler.get());
99 if (getLangOpts().OpenMP)
100 OpenMPHandler.reset(new PragmaOpenMPHandler());
102 OpenMPHandler.reset(new PragmaNoOpenMPHandler());
103 PP.AddPragmaHandler(OpenMPHandler.get());
105 if (getLangOpts().MicrosoftExt) {
106 MSCommentHandler.reset(new PragmaCommentHandler(actions));
107 PP.AddPragmaHandler(MSCommentHandler.get());
108 MSDetectMismatchHandler.reset(new PragmaDetectMismatchHandler(actions));
109 PP.AddPragmaHandler(MSDetectMismatchHandler.get());
112 CommentSemaHandler.reset(new ActionCommentHandler(actions));
113 PP.addCommentHandler(CommentSemaHandler.get());
115 PP.setCodeCompletionHandler(*this);
118 DiagnosticBuilder Parser::Diag(SourceLocation Loc, unsigned DiagID) {
119 return Diags.Report(Loc, DiagID);
122 DiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) {
123 return Diag(Tok.getLocation(), DiagID);
126 /// \brief Emits a diagnostic suggesting parentheses surrounding a
129 /// \param Loc The location where we'll emit the diagnostic.
130 /// \param DK The kind of diagnostic to emit.
131 /// \param ParenRange Source range enclosing code that should be parenthesized.
132 void Parser::SuggestParentheses(SourceLocation Loc, unsigned DK,
133 SourceRange ParenRange) {
134 SourceLocation EndLoc = PP.getLocForEndOfToken(ParenRange.getEnd());
135 if (!ParenRange.getEnd().isFileID() || EndLoc.isInvalid()) {
136 // We can't display the parentheses, so just dig the
137 // warning/error and return.
143 << FixItHint::CreateInsertion(ParenRange.getBegin(), "(")
144 << FixItHint::CreateInsertion(EndLoc, ")");
147 static bool IsCommonTypo(tok::TokenKind ExpectedTok, const Token &Tok) {
148 switch (ExpectedTok) {
150 return Tok.is(tok::colon) || Tok.is(tok::comma); // : or , for ;
151 default: return false;
155 /// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the
156 /// input. If so, it is consumed and false is returned.
158 /// If the input is malformed, this emits the specified diagnostic. Next, if
159 /// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is
161 bool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID,
162 const char *Msg, tok::TokenKind SkipToTok) {
163 if (Tok.is(ExpectedTok) || Tok.is(tok::code_completion)) {
168 // Detect common single-character typos and resume.
169 if (IsCommonTypo(ExpectedTok, Tok)) {
170 SourceLocation Loc = Tok.getLocation();
173 << FixItHint::CreateReplacement(SourceRange(Loc),
174 getTokenSimpleSpelling(ExpectedTok));
177 // Pretend there wasn't a problem.
181 const char *Spelling = 0;
182 SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation);
183 if (EndLoc.isValid() &&
184 (Spelling = tok::getTokenSimpleSpelling(ExpectedTok))) {
185 // Show what code to insert to fix this problem.
188 << FixItHint::CreateInsertion(EndLoc, Spelling);
190 Diag(Tok, DiagID) << Msg;
192 if (SkipToTok != tok::unknown)
193 SkipUntil(SkipToTok, StopAtSemi);
197 bool Parser::ExpectAndConsumeSemi(unsigned DiagID) {
198 if (Tok.is(tok::semi) || Tok.is(tok::code_completion)) {
203 if ((Tok.is(tok::r_paren) || Tok.is(tok::r_square)) &&
204 NextToken().is(tok::semi)) {
205 Diag(Tok, diag::err_extraneous_token_before_semi)
206 << PP.getSpelling(Tok)
207 << FixItHint::CreateRemoval(Tok.getLocation());
208 ConsumeAnyToken(); // The ')' or ']'.
209 ConsumeToken(); // The ';'.
213 return ExpectAndConsume(tok::semi, DiagID);
216 void Parser::ConsumeExtraSemi(ExtraSemiKind Kind, unsigned TST) {
217 if (!Tok.is(tok::semi)) return;
219 bool HadMultipleSemis = false;
220 SourceLocation StartLoc = Tok.getLocation();
221 SourceLocation EndLoc = Tok.getLocation();
224 while ((Tok.is(tok::semi) && !Tok.isAtStartOfLine())) {
225 HadMultipleSemis = true;
226 EndLoc = Tok.getLocation();
230 // C++11 allows extra semicolons at namespace scope, but not in any of the
232 if (Kind == OutsideFunction && getLangOpts().CPlusPlus) {
233 if (getLangOpts().CPlusPlus11)
234 Diag(StartLoc, diag::warn_cxx98_compat_top_level_semi)
235 << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
237 Diag(StartLoc, diag::ext_extra_semi_cxx11)
238 << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
242 if (Kind != AfterMemberFunctionDefinition || HadMultipleSemis)
243 Diag(StartLoc, diag::ext_extra_semi)
244 << Kind << DeclSpec::getSpecifierName((DeclSpec::TST)TST)
245 << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
247 // A single semicolon is valid after a member function definition.
248 Diag(StartLoc, diag::warn_extra_semi_after_mem_fn_def)
249 << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
252 //===----------------------------------------------------------------------===//
254 //===----------------------------------------------------------------------===//
256 static bool HasFlagsSet(Parser::SkipUntilFlags L, Parser::SkipUntilFlags R) {
257 return (static_cast<unsigned>(L) & static_cast<unsigned>(R)) != 0;
260 /// SkipUntil - Read tokens until we get to the specified token, then consume
261 /// it (unless no flag StopBeforeMatch). Because we cannot guarantee that the
262 /// token will ever occur, this skips to the next token, or to some likely
263 /// good stopping point. If StopAtSemi is true, skipping will stop at a ';'
266 /// If SkipUntil finds the specified token, it returns true, otherwise it
268 bool Parser::SkipUntil(ArrayRef<tok::TokenKind> Toks, SkipUntilFlags Flags) {
269 // We always want this function to skip at least one token if the first token
270 // isn't T and if not at EOF.
271 bool isFirstTokenSkipped = true;
273 // If we found one of the tokens, stop and return true.
274 for (unsigned i = 0, NumToks = Toks.size(); i != NumToks; ++i) {
275 if (Tok.is(Toks[i])) {
276 if (HasFlagsSet(Flags, StopBeforeMatch)) {
277 // Noop, don't consume the token.
285 // Important special case: The caller has given up and just wants us to
286 // skip the rest of the file. Do this without recursing, since we can
287 // get here precisely because the caller detected too much recursion.
288 if (Toks.size() == 1 && Toks[0] == tok::eof &&
289 !HasFlagsSet(Flags, StopAtSemi) &&
290 !HasFlagsSet(Flags, StopAtCodeCompletion)) {
291 while (Tok.getKind() != tok::eof)
296 switch (Tok.getKind()) {
298 // Ran out of tokens.
301 case tok::code_completion:
302 if (!HasFlagsSet(Flags, StopAtCodeCompletion))
307 // Recursively skip properly-nested parens.
309 if (HasFlagsSet(Flags, StopAtCodeCompletion))
310 SkipUntil(tok::r_paren, StopAtCodeCompletion);
312 SkipUntil(tok::r_paren);
315 // Recursively skip properly-nested square brackets.
317 if (HasFlagsSet(Flags, StopAtCodeCompletion))
318 SkipUntil(tok::r_square, StopAtCodeCompletion);
320 SkipUntil(tok::r_square);
323 // Recursively skip properly-nested braces.
325 if (HasFlagsSet(Flags, StopAtCodeCompletion))
326 SkipUntil(tok::r_brace, StopAtCodeCompletion);
328 SkipUntil(tok::r_brace);
331 // Okay, we found a ']' or '}' or ')', which we think should be balanced.
332 // Since the user wasn't looking for this token (if they were, it would
333 // already be handled), this isn't balanced. If there is a LHS token at a
334 // higher level, we will assume that this matches the unbalanced token
335 // and return it. Otherwise, this is a spurious RHS token, which we skip.
337 if (ParenCount && !isFirstTokenSkipped)
338 return false; // Matches something.
342 if (BracketCount && !isFirstTokenSkipped)
343 return false; // Matches something.
347 if (BraceCount && !isFirstTokenSkipped)
348 return false; // Matches something.
352 case tok::string_literal:
353 case tok::wide_string_literal:
354 case tok::utf8_string_literal:
355 case tok::utf16_string_literal:
356 case tok::utf32_string_literal:
357 ConsumeStringToken();
361 if (HasFlagsSet(Flags, StopAtSemi))
369 isFirstTokenSkipped = false;
373 //===----------------------------------------------------------------------===//
374 // Scope manipulation
375 //===----------------------------------------------------------------------===//
377 /// EnterScope - Start a new scope.
378 void Parser::EnterScope(unsigned ScopeFlags) {
379 if (NumCachedScopes) {
380 Scope *N = ScopeCache[--NumCachedScopes];
381 N->Init(getCurScope(), ScopeFlags);
382 Actions.CurScope = N;
384 Actions.CurScope = new Scope(getCurScope(), ScopeFlags, Diags);
388 /// ExitScope - Pop a scope off the scope stack.
389 void Parser::ExitScope() {
390 assert(getCurScope() && "Scope imbalance!");
392 // Inform the actions module that this scope is going away if there are any
394 if (!getCurScope()->decl_empty())
395 Actions.ActOnPopScope(Tok.getLocation(), getCurScope());
397 Scope *OldScope = getCurScope();
398 Actions.CurScope = OldScope->getParent();
400 if (NumCachedScopes == ScopeCacheSize)
403 ScopeCache[NumCachedScopes++] = OldScope;
406 /// Set the flags for the current scope to ScopeFlags. If ManageFlags is false,
407 /// this object does nothing.
408 Parser::ParseScopeFlags::ParseScopeFlags(Parser *Self, unsigned ScopeFlags,
410 : CurScope(ManageFlags ? Self->getCurScope() : 0) {
412 OldFlags = CurScope->getFlags();
413 CurScope->setFlags(ScopeFlags);
417 /// Restore the flags for the current scope to what they were before this
418 /// object overrode them.
419 Parser::ParseScopeFlags::~ParseScopeFlags() {
421 CurScope->setFlags(OldFlags);
425 //===----------------------------------------------------------------------===//
426 // C99 6.9: External Definitions.
427 //===----------------------------------------------------------------------===//
430 // If we still have scopes active, delete the scope tree.
431 delete getCurScope();
432 Actions.CurScope = 0;
434 // Free the scope cache.
435 for (unsigned i = 0, e = NumCachedScopes; i != e; ++i)
436 delete ScopeCache[i];
438 // Remove the pragma handlers we installed.
439 PP.RemovePragmaHandler(AlignHandler.get());
440 AlignHandler.reset();
441 PP.RemovePragmaHandler("GCC", GCCVisibilityHandler.get());
442 GCCVisibilityHandler.reset();
443 PP.RemovePragmaHandler(OptionsHandler.get());
444 OptionsHandler.reset();
445 PP.RemovePragmaHandler(PackHandler.get());
447 PP.RemovePragmaHandler(MSStructHandler.get());
448 MSStructHandler.reset();
449 PP.RemovePragmaHandler(UnusedHandler.get());
450 UnusedHandler.reset();
451 PP.RemovePragmaHandler(WeakHandler.get());
453 PP.RemovePragmaHandler(RedefineExtnameHandler.get());
454 RedefineExtnameHandler.reset();
456 if (getLangOpts().OpenCL) {
457 PP.RemovePragmaHandler("OPENCL", OpenCLExtensionHandler.get());
458 OpenCLExtensionHandler.reset();
459 PP.RemovePragmaHandler("OPENCL", FPContractHandler.get());
461 PP.RemovePragmaHandler(OpenMPHandler.get());
462 OpenMPHandler.reset();
464 if (getLangOpts().MicrosoftExt) {
465 PP.RemovePragmaHandler(MSCommentHandler.get());
466 MSCommentHandler.reset();
467 PP.RemovePragmaHandler(MSDetectMismatchHandler.get());
468 MSDetectMismatchHandler.reset();
471 PP.RemovePragmaHandler("STDC", FPContractHandler.get());
472 FPContractHandler.reset();
474 PP.removeCommentHandler(CommentSemaHandler.get());
476 PP.clearCodeCompletionHandler();
478 assert(TemplateIds.empty() && "Still alive TemplateIdAnnotations around?");
481 /// Initialize - Warm up the parser.
483 void Parser::Initialize() {
484 // Create the translation unit scope. Install it as the current scope.
485 assert(getCurScope() == 0 && "A scope is already active?");
486 EnterScope(Scope::DeclScope);
487 Actions.ActOnTranslationUnitScope(getCurScope());
489 // Initialization for Objective-C context sensitive keywords recognition.
490 // Referenced in Parser::ParseObjCTypeQualifierList.
491 if (getLangOpts().ObjC1) {
492 ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in");
493 ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out");
494 ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout");
495 ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway");
496 ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy");
497 ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref");
500 Ident_instancetype = 0;
505 Ident_super = &PP.getIdentifierTable().get("super");
507 if (getLangOpts().AltiVec) {
508 Ident_vector = &PP.getIdentifierTable().get("vector");
509 Ident_pixel = &PP.getIdentifierTable().get("pixel");
510 Ident_bool = &PP.getIdentifierTable().get("bool");
513 Ident_introduced = 0;
514 Ident_deprecated = 0;
516 Ident_unavailable = 0;
520 Ident__exception_code = Ident__exception_info = Ident__abnormal_termination = 0;
521 Ident___exception_code = Ident___exception_info = Ident___abnormal_termination = 0;
522 Ident_GetExceptionCode = Ident_GetExceptionInfo = Ident_AbnormalTermination = 0;
524 if(getLangOpts().Borland) {
525 Ident__exception_info = PP.getIdentifierInfo("_exception_info");
526 Ident___exception_info = PP.getIdentifierInfo("__exception_info");
527 Ident_GetExceptionInfo = PP.getIdentifierInfo("GetExceptionInformation");
528 Ident__exception_code = PP.getIdentifierInfo("_exception_code");
529 Ident___exception_code = PP.getIdentifierInfo("__exception_code");
530 Ident_GetExceptionCode = PP.getIdentifierInfo("GetExceptionCode");
531 Ident__abnormal_termination = PP.getIdentifierInfo("_abnormal_termination");
532 Ident___abnormal_termination = PP.getIdentifierInfo("__abnormal_termination");
533 Ident_AbnormalTermination = PP.getIdentifierInfo("AbnormalTermination");
535 PP.SetPoisonReason(Ident__exception_code,diag::err_seh___except_block);
536 PP.SetPoisonReason(Ident___exception_code,diag::err_seh___except_block);
537 PP.SetPoisonReason(Ident_GetExceptionCode,diag::err_seh___except_block);
538 PP.SetPoisonReason(Ident__exception_info,diag::err_seh___except_filter);
539 PP.SetPoisonReason(Ident___exception_info,diag::err_seh___except_filter);
540 PP.SetPoisonReason(Ident_GetExceptionInfo,diag::err_seh___except_filter);
541 PP.SetPoisonReason(Ident__abnormal_termination,diag::err_seh___finally_block);
542 PP.SetPoisonReason(Ident___abnormal_termination,diag::err_seh___finally_block);
543 PP.SetPoisonReason(Ident_AbnormalTermination,diag::err_seh___finally_block);
546 Actions.Initialize();
548 // Prime the lexer look-ahead.
553 /// \brief RAIIObject to destroy the contents of a SmallVector of
554 /// TemplateIdAnnotation pointers and clear the vector.
555 class DestroyTemplateIdAnnotationsRAIIObj {
556 SmallVectorImpl<TemplateIdAnnotation *> &Container;
558 DestroyTemplateIdAnnotationsRAIIObj(SmallVectorImpl<TemplateIdAnnotation *>
560 : Container(Container) {}
562 ~DestroyTemplateIdAnnotationsRAIIObj() {
563 for (SmallVectorImpl<TemplateIdAnnotation *>::iterator I =
564 Container.begin(), E = Container.end();
572 /// ParseTopLevelDecl - Parse one top-level declaration, return whatever the
573 /// action tells us to. This returns true if the EOF was encountered.
574 bool Parser::ParseTopLevelDecl(DeclGroupPtrTy &Result) {
575 DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
577 // Skip over the EOF token, flagging end of previous input for incremental
579 if (PP.isIncrementalProcessingEnabled() && Tok.is(tok::eof))
582 Result = DeclGroupPtrTy();
583 switch (Tok.getKind()) {
584 case tok::annot_pragma_unused:
585 HandlePragmaUnused();
588 case tok::annot_module_include:
589 Actions.ActOnModuleInclude(Tok.getLocation(),
590 reinterpret_cast<Module *>(
591 Tok.getAnnotationValue()));
596 // Late template parsing can begin.
597 if (getLangOpts().DelayedTemplateParsing)
598 Actions.SetLateTemplateParser(LateTemplateParserCallback, this);
599 if (!PP.isIncrementalProcessingEnabled())
600 Actions.ActOnEndOfTranslationUnit();
601 //else don't tell Sema that we ended parsing: more input might come.
608 ParsedAttributesWithRange attrs(AttrFactory);
609 MaybeParseCXX11Attributes(attrs);
610 MaybeParseMicrosoftAttributes(attrs);
612 Result = ParseExternalDeclaration(attrs);
616 /// ParseExternalDeclaration:
618 /// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl]
619 /// function-definition
621 /// [GNU] asm-definition
622 /// [GNU] __extension__ external-declaration
623 /// [OBJC] objc-class-definition
624 /// [OBJC] objc-class-declaration
625 /// [OBJC] objc-alias-declaration
626 /// [OBJC] objc-protocol-definition
627 /// [OBJC] objc-method-definition
629 /// [C++] linkage-specification
630 /// [GNU] asm-definition:
631 /// simple-asm-expr ';'
632 /// [C++11] empty-declaration
633 /// [C++11] attribute-declaration
635 /// [C++11] empty-declaration:
638 /// [C++0x/GNU] 'extern' 'template' declaration
639 Parser::DeclGroupPtrTy
640 Parser::ParseExternalDeclaration(ParsedAttributesWithRange &attrs,
641 ParsingDeclSpec *DS) {
642 DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
643 ParenBraceBracketBalancer BalancerRAIIObj(*this);
645 if (PP.isCodeCompletionReached()) {
647 return DeclGroupPtrTy();
650 Decl *SingleDecl = 0;
651 switch (Tok.getKind()) {
652 case tok::annot_pragma_vis:
653 HandlePragmaVisibility();
654 return DeclGroupPtrTy();
655 case tok::annot_pragma_pack:
657 return DeclGroupPtrTy();
658 case tok::annot_pragma_msstruct:
659 HandlePragmaMSStruct();
660 return DeclGroupPtrTy();
661 case tok::annot_pragma_align:
663 return DeclGroupPtrTy();
664 case tok::annot_pragma_weak:
666 return DeclGroupPtrTy();
667 case tok::annot_pragma_weakalias:
668 HandlePragmaWeakAlias();
669 return DeclGroupPtrTy();
670 case tok::annot_pragma_redefine_extname:
671 HandlePragmaRedefineExtname();
672 return DeclGroupPtrTy();
673 case tok::annot_pragma_fp_contract:
674 HandlePragmaFPContract();
675 return DeclGroupPtrTy();
676 case tok::annot_pragma_opencl_extension:
677 HandlePragmaOpenCLExtension();
678 return DeclGroupPtrTy();
679 case tok::annot_pragma_openmp:
680 ParseOpenMPDeclarativeDirective();
681 return DeclGroupPtrTy();
683 // Either a C++11 empty-declaration or attribute-declaration.
684 SingleDecl = Actions.ActOnEmptyDeclaration(getCurScope(),
687 ConsumeExtraSemi(OutsideFunction);
690 Diag(Tok, diag::err_extraneous_closing_brace);
692 return DeclGroupPtrTy();
694 Diag(Tok, diag::err_expected_external_declaration);
695 return DeclGroupPtrTy();
696 case tok::kw___extension__: {
697 // __extension__ silences extension warnings in the subexpression.
698 ExtensionRAIIObject O(Diags); // Use RAII to do this.
700 return ParseExternalDeclaration(attrs);
703 ProhibitAttributes(attrs);
705 SourceLocation StartLoc = Tok.getLocation();
706 SourceLocation EndLoc;
707 ExprResult Result(ParseSimpleAsm(&EndLoc));
709 ExpectAndConsume(tok::semi, diag::err_expected_semi_after,
710 "top-level asm block");
712 if (Result.isInvalid())
713 return DeclGroupPtrTy();
714 SingleDecl = Actions.ActOnFileScopeAsmDecl(Result.get(), StartLoc, EndLoc);
718 return ParseObjCAtDirectives();
721 if (!getLangOpts().ObjC1) {
722 Diag(Tok, diag::err_expected_external_declaration);
724 return DeclGroupPtrTy();
726 SingleDecl = ParseObjCMethodDefinition();
728 case tok::code_completion:
729 Actions.CodeCompleteOrdinaryName(getCurScope(),
730 CurParsedObjCImpl? Sema::PCC_ObjCImplementation
731 : Sema::PCC_Namespace);
733 return DeclGroupPtrTy();
735 case tok::kw_namespace:
736 case tok::kw_typedef:
737 case tok::kw_template:
738 case tok::kw_export: // As in 'export template'
739 case tok::kw_static_assert:
740 case tok::kw__Static_assert:
741 // A function definition cannot start with any of these keywords.
743 SourceLocation DeclEnd;
745 return ParseDeclaration(Stmts, Declarator::FileContext, DeclEnd, attrs);
749 // Parse (then ignore) 'static' prior to a template instantiation. This is
750 // a GCC extension that we intentionally do not support.
751 if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
752 Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
754 SourceLocation DeclEnd;
756 return ParseDeclaration(Stmts, Declarator::FileContext, DeclEnd, attrs);
761 if (getLangOpts().CPlusPlus) {
762 tok::TokenKind NextKind = NextToken().getKind();
764 // Inline namespaces. Allowed as an extension even in C++03.
765 if (NextKind == tok::kw_namespace) {
766 SourceLocation DeclEnd;
768 return ParseDeclaration(Stmts, Declarator::FileContext, DeclEnd, attrs);
771 // Parse (then ignore) 'inline' prior to a template instantiation. This is
772 // a GCC extension that we intentionally do not support.
773 if (NextKind == tok::kw_template) {
774 Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
776 SourceLocation DeclEnd;
778 return ParseDeclaration(Stmts, Declarator::FileContext, DeclEnd, attrs);
784 if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
786 SourceLocation ExternLoc = ConsumeToken();
787 SourceLocation TemplateLoc = ConsumeToken();
788 Diag(ExternLoc, getLangOpts().CPlusPlus11 ?
789 diag::warn_cxx98_compat_extern_template :
790 diag::ext_extern_template) << SourceRange(ExternLoc, TemplateLoc);
791 SourceLocation DeclEnd;
792 return Actions.ConvertDeclToDeclGroup(
793 ParseExplicitInstantiation(Declarator::FileContext,
794 ExternLoc, TemplateLoc, DeclEnd));
796 // FIXME: Detect C++ linkage specifications here?
799 case tok::kw___if_exists:
800 case tok::kw___if_not_exists:
801 ParseMicrosoftIfExistsExternalDeclaration();
802 return DeclGroupPtrTy();
806 // We can't tell whether this is a function-definition or declaration yet.
807 return ParseDeclarationOrFunctionDefinition(attrs, DS);
810 // This routine returns a DeclGroup, if the thing we parsed only contains a
811 // single decl, convert it now.
812 return Actions.ConvertDeclToDeclGroup(SingleDecl);
815 /// \brief Determine whether the current token, if it occurs after a
816 /// declarator, continues a declaration or declaration list.
817 bool Parser::isDeclarationAfterDeclarator() {
818 // Check for '= delete' or '= default'
819 if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
820 const Token &KW = NextToken();
821 if (KW.is(tok::kw_default) || KW.is(tok::kw_delete))
825 return Tok.is(tok::equal) || // int X()= -> not a function def
826 Tok.is(tok::comma) || // int X(), -> not a function def
827 Tok.is(tok::semi) || // int X(); -> not a function def
828 Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def
829 Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def
830 (getLangOpts().CPlusPlus &&
831 Tok.is(tok::l_paren)); // int X(0) -> not a function def [C++]
834 /// \brief Determine whether the current token, if it occurs after a
835 /// declarator, indicates the start of a function definition.
836 bool Parser::isStartOfFunctionDefinition(const ParsingDeclarator &Declarator) {
837 assert(Declarator.isFunctionDeclarator() && "Isn't a function declarator");
838 if (Tok.is(tok::l_brace)) // int X() {}
841 // Handle K&R C argument lists: int X(f) int f; {}
842 if (!getLangOpts().CPlusPlus &&
843 Declarator.getFunctionTypeInfo().isKNRPrototype())
844 return isDeclarationSpecifier();
846 if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
847 const Token &KW = NextToken();
848 return KW.is(tok::kw_default) || KW.is(tok::kw_delete);
851 return Tok.is(tok::colon) || // X() : Base() {} (used for ctors)
852 Tok.is(tok::kw_try); // X() try { ... }
855 /// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or
856 /// a declaration. We can't tell which we have until we read up to the
857 /// compound-statement in function-definition. TemplateParams, if
858 /// non-NULL, provides the template parameters when we're parsing a
859 /// C++ template-declaration.
861 /// function-definition: [C99 6.9.1]
862 /// decl-specs declarator declaration-list[opt] compound-statement
863 /// [C90] function-definition: [C99 6.7.1] - implicit int result
864 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
866 /// declaration: [C99 6.7]
867 /// declaration-specifiers init-declarator-list[opt] ';'
868 /// [!C99] init-declarator-list ';' [TODO: warn in c99 mode]
869 /// [OMP] threadprivate-directive [TODO]
871 Parser::DeclGroupPtrTy
872 Parser::ParseDeclOrFunctionDefInternal(ParsedAttributesWithRange &attrs,
874 AccessSpecifier AS) {
875 // Parse the common declaration-specifiers piece.
876 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS, DSC_top_level);
878 // If we had a free-standing type definition with a missing semicolon, we
879 // may get this far before the problem becomes obvious.
880 if (DS.hasTagDefinition() &&
881 DiagnoseMissingSemiAfterTagDefinition(DS, AS, DSC_top_level))
882 return DeclGroupPtrTy();
884 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
885 // declaration-specifiers init-declarator-list[opt] ';'
886 if (Tok.is(tok::semi)) {
887 ProhibitAttributes(attrs);
889 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS);
890 DS.complete(TheDecl);
891 return Actions.ConvertDeclToDeclGroup(TheDecl);
894 DS.takeAttributesFrom(attrs);
896 // ObjC2 allows prefix attributes on class interfaces and protocols.
897 // FIXME: This still needs better diagnostics. We should only accept
898 // attributes here, no types, etc.
899 if (getLangOpts().ObjC2 && Tok.is(tok::at)) {
900 SourceLocation AtLoc = ConsumeToken(); // the "@"
901 if (!Tok.isObjCAtKeyword(tok::objc_interface) &&
902 !Tok.isObjCAtKeyword(tok::objc_protocol)) {
903 Diag(Tok, diag::err_objc_unexpected_attr);
904 SkipUntil(tok::semi); // FIXME: better skip?
905 return DeclGroupPtrTy();
910 const char *PrevSpec = 0;
912 if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec, DiagID))
913 Diag(AtLoc, DiagID) << PrevSpec;
915 if (Tok.isObjCAtKeyword(tok::objc_protocol))
916 return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes());
918 return Actions.ConvertDeclToDeclGroup(
919 ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()));
922 // If the declspec consisted only of 'extern' and we have a string
923 // literal following it, this must be a C++ linkage specifier like
925 if (Tok.is(tok::string_literal) && getLangOpts().CPlusPlus &&
926 DS.getStorageClassSpec() == DeclSpec::SCS_extern &&
927 DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) {
928 Decl *TheDecl = ParseLinkage(DS, Declarator::FileContext);
929 return Actions.ConvertDeclToDeclGroup(TheDecl);
932 return ParseDeclGroup(DS, Declarator::FileContext, true);
935 Parser::DeclGroupPtrTy
936 Parser::ParseDeclarationOrFunctionDefinition(ParsedAttributesWithRange &attrs,
938 AccessSpecifier AS) {
940 return ParseDeclOrFunctionDefInternal(attrs, *DS, AS);
942 ParsingDeclSpec PDS(*this);
943 // Must temporarily exit the objective-c container scope for
944 // parsing c constructs and re-enter objc container scope
946 ObjCDeclContextSwitch ObjCDC(*this);
948 return ParseDeclOrFunctionDefInternal(attrs, PDS, AS);
953 static inline bool isFunctionDeclaratorRequiringReturnTypeDeduction(
954 const Declarator &D) {
955 if (!D.isFunctionDeclarator() || !D.getDeclSpec().containsPlaceholderType())
957 for (unsigned I = 0, E = D.getNumTypeObjects(); I != E; ++I) {
958 unsigned chunkIndex = E - I - 1;
959 const DeclaratorChunk &DeclType = D.getTypeObject(chunkIndex);
960 if (DeclType.Kind == DeclaratorChunk::Function) {
961 const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun;
962 if (!FTI.hasTrailingReturnType())
964 QualType TrailingRetType = FTI.getTrailingReturnType().get();
965 return TrailingRetType->getCanonicalTypeInternal()
966 ->getContainedAutoType();
972 /// ParseFunctionDefinition - We parsed and verified that the specified
973 /// Declarator is well formed. If this is a K&R-style function, read the
974 /// parameters declaration-list, then start the compound-statement.
976 /// function-definition: [C99 6.9.1]
977 /// decl-specs declarator declaration-list[opt] compound-statement
978 /// [C90] function-definition: [C99 6.7.1] - implicit int result
979 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
980 /// [C++] function-definition: [C++ 8.4]
981 /// decl-specifier-seq[opt] declarator ctor-initializer[opt]
983 /// [C++] function-definition: [C++ 8.4]
984 /// decl-specifier-seq[opt] declarator function-try-block
986 Decl *Parser::ParseFunctionDefinition(ParsingDeclarator &D,
987 const ParsedTemplateInfo &TemplateInfo,
988 LateParsedAttrList *LateParsedAttrs) {
989 // Poison the SEH identifiers so they are flagged as illegal in function bodies
990 PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true);
991 const DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo();
993 // If this is C90 and the declspecs were completely missing, fudge in an
994 // implicit int. We do this here because this is the only place where
995 // declaration-specifiers are completely optional in the grammar.
996 if (getLangOpts().ImplicitInt && D.getDeclSpec().isEmpty()) {
997 const char *PrevSpec;
999 D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int,
1000 D.getIdentifierLoc(),
1002 D.SetRangeBegin(D.getDeclSpec().getSourceRange().getBegin());
1005 // If this declaration was formed with a K&R-style identifier list for the
1006 // arguments, parse declarations for all of the args next.
1007 // int foo(a,b) int a; float b; {}
1008 if (FTI.isKNRPrototype())
1009 ParseKNRParamDeclarations(D);
1011 // We should have either an opening brace or, in a C++ constructor,
1012 // we may have a colon.
1013 if (Tok.isNot(tok::l_brace) &&
1014 (!getLangOpts().CPlusPlus ||
1015 (Tok.isNot(tok::colon) && Tok.isNot(tok::kw_try) &&
1016 Tok.isNot(tok::equal)))) {
1017 Diag(Tok, diag::err_expected_fn_body);
1019 // Skip over garbage, until we get to '{'. Don't eat the '{'.
1020 SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
1022 // If we didn't find the '{', bail out.
1023 if (Tok.isNot(tok::l_brace))
1027 // Check to make sure that any normal attributes are allowed to be on
1028 // a definition. Late parsed attributes are checked at the end.
1029 if (Tok.isNot(tok::equal)) {
1030 AttributeList *DtorAttrs = D.getAttributes();
1032 if (!IsThreadSafetyAttribute(DtorAttrs->getName()->getName()) &&
1033 !DtorAttrs->isCXX11Attribute()) {
1034 Diag(DtorAttrs->getLoc(), diag::warn_attribute_on_function_definition)
1035 << DtorAttrs->getName()->getName();
1037 DtorAttrs = DtorAttrs->getNext();
1041 // In delayed template parsing mode, for function template we consume the
1042 // tokens and store them for late parsing at the end of the translation unit.
1043 if (getLangOpts().DelayedTemplateParsing && Tok.isNot(tok::equal) &&
1044 TemplateInfo.Kind == ParsedTemplateInfo::Template &&
1045 !D.getDeclSpec().isConstexprSpecified() &&
1046 !isFunctionDeclaratorRequiringReturnTypeDeduction(D)) {
1047 MultiTemplateParamsArg TemplateParameterLists(*TemplateInfo.TemplateParams);
1049 ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
1050 Scope *ParentScope = getCurScope()->getParent();
1052 D.setFunctionDefinitionKind(FDK_Definition);
1053 Decl *DP = Actions.HandleDeclarator(ParentScope, D,
1054 TemplateParameterLists);
1056 D.getMutableDeclSpec().abort();
1059 LexTemplateFunctionForLateParsing(Toks);
1062 FunctionDecl *FnD = 0;
1063 if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(DP))
1064 FnD = FunTmpl->getTemplatedDecl();
1066 FnD = cast<FunctionDecl>(DP);
1068 Actions.CheckForFunctionRedefinition(FnD);
1069 Actions.MarkAsLateParsedTemplate(FnD, DP, Toks);
1073 else if (CurParsedObjCImpl &&
1074 !TemplateInfo.TemplateParams &&
1075 (Tok.is(tok::l_brace) || Tok.is(tok::kw_try) ||
1076 Tok.is(tok::colon)) &&
1077 Actions.CurContext->isTranslationUnit()) {
1078 ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
1079 Scope *ParentScope = getCurScope()->getParent();
1081 D.setFunctionDefinitionKind(FDK_Definition);
1082 Decl *FuncDecl = Actions.HandleDeclarator(ParentScope, D,
1083 MultiTemplateParamsArg());
1084 D.complete(FuncDecl);
1085 D.getMutableDeclSpec().abort();
1087 // Consume the tokens and store them for later parsing.
1088 StashAwayMethodOrFunctionBodyTokens(FuncDecl);
1089 CurParsedObjCImpl->HasCFunction = true;
1094 // Enter a scope for the function body.
1095 ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
1097 // Tell the actions module that we have entered a function definition with the
1098 // specified Declarator for the function.
1099 Decl *Res = TemplateInfo.TemplateParams?
1100 Actions.ActOnStartOfFunctionTemplateDef(getCurScope(),
1101 *TemplateInfo.TemplateParams, D)
1102 : Actions.ActOnStartOfFunctionDef(getCurScope(), D);
1104 // Break out of the ParsingDeclarator context before we parse the body.
1107 // Break out of the ParsingDeclSpec context, too. This const_cast is
1108 // safe because we're always the sole owner.
1109 D.getMutableDeclSpec().abort();
1111 if (Tok.is(tok::equal)) {
1112 assert(getLangOpts().CPlusPlus && "Only C++ function definitions have '='");
1115 Actions.ActOnFinishFunctionBody(Res, 0, false);
1117 bool Delete = false;
1118 SourceLocation KWLoc;
1119 if (Tok.is(tok::kw_delete)) {
1120 Diag(Tok, getLangOpts().CPlusPlus11 ?
1121 diag::warn_cxx98_compat_deleted_function :
1122 diag::ext_deleted_function);
1124 KWLoc = ConsumeToken();
1125 Actions.SetDeclDeleted(Res, KWLoc);
1127 } else if (Tok.is(tok::kw_default)) {
1128 Diag(Tok, getLangOpts().CPlusPlus11 ?
1129 diag::warn_cxx98_compat_defaulted_function :
1130 diag::ext_defaulted_function);
1132 KWLoc = ConsumeToken();
1133 Actions.SetDeclDefaulted(Res, KWLoc);
1135 llvm_unreachable("function definition after = not 'delete' or 'default'");
1138 if (Tok.is(tok::comma)) {
1139 Diag(KWLoc, diag::err_default_delete_in_multiple_declaration)
1141 SkipUntil(tok::semi);
1143 ExpectAndConsume(tok::semi, diag::err_expected_semi_after,
1144 Delete ? "delete" : "default", tok::semi);
1150 if (Tok.is(tok::kw_try))
1151 return ParseFunctionTryBlock(Res, BodyScope);
1153 // If we have a colon, then we're probably parsing a C++
1154 // ctor-initializer.
1155 if (Tok.is(tok::colon)) {
1156 ParseConstructorInitializer(Res);
1158 // Recover from error.
1159 if (!Tok.is(tok::l_brace)) {
1161 Actions.ActOnFinishFunctionBody(Res, 0);
1165 Actions.ActOnDefaultCtorInitializers(Res);
1167 // Late attributes are parsed in the same scope as the function body.
1168 if (LateParsedAttrs)
1169 ParseLexedAttributeList(*LateParsedAttrs, Res, false, true);
1171 return ParseFunctionStatementBody(Res, BodyScope);
1174 /// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides
1175 /// types for a function with a K&R-style identifier list for arguments.
1176 void Parser::ParseKNRParamDeclarations(Declarator &D) {
1177 // We know that the top-level of this declarator is a function.
1178 DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo();
1180 // Enter function-declaration scope, limiting any declarators to the
1181 // function prototype scope, including parameter declarators.
1182 ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
1183 Scope::FunctionDeclarationScope | Scope::DeclScope);
1185 // Read all the argument declarations.
1186 while (isDeclarationSpecifier()) {
1187 SourceLocation DSStart = Tok.getLocation();
1189 // Parse the common declaration-specifiers piece.
1190 DeclSpec DS(AttrFactory);
1191 ParseDeclarationSpecifiers(DS);
1193 // C99 6.9.1p6: 'each declaration in the declaration list shall have at
1194 // least one declarator'.
1195 // NOTE: GCC just makes this an ext-warn. It's not clear what it does with
1196 // the declarations though. It's trivial to ignore them, really hard to do
1197 // anything else with them.
1198 if (Tok.is(tok::semi)) {
1199 Diag(DSStart, diag::err_declaration_does_not_declare_param);
1204 // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other
1206 if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified &&
1207 DS.getStorageClassSpec() != DeclSpec::SCS_register) {
1208 Diag(DS.getStorageClassSpecLoc(),
1209 diag::err_invalid_storage_class_in_func_decl);
1210 DS.ClearStorageClassSpecs();
1212 if (DS.getThreadStorageClassSpec() != DeclSpec::TSCS_unspecified) {
1213 Diag(DS.getThreadStorageClassSpecLoc(),
1214 diag::err_invalid_storage_class_in_func_decl);
1215 DS.ClearStorageClassSpecs();
1218 // Parse the first declarator attached to this declspec.
1219 Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext);
1220 ParseDeclarator(ParmDeclarator);
1222 // Handle the full declarator list.
1224 // If attributes are present, parse them.
1225 MaybeParseGNUAttributes(ParmDeclarator);
1227 // Ask the actions module to compute the type for this declarator.
1229 Actions.ActOnParamDeclarator(getCurScope(), ParmDeclarator);
1232 // A missing identifier has already been diagnosed.
1233 ParmDeclarator.getIdentifier()) {
1235 // Scan the argument list looking for the correct param to apply this
1237 for (unsigned i = 0; ; ++i) {
1238 // C99 6.9.1p6: those declarators shall declare only identifiers from
1239 // the identifier list.
1240 if (i == FTI.NumArgs) {
1241 Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param)
1242 << ParmDeclarator.getIdentifier();
1246 if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) {
1247 // Reject redefinitions of parameters.
1248 if (FTI.ArgInfo[i].Param) {
1249 Diag(ParmDeclarator.getIdentifierLoc(),
1250 diag::err_param_redefinition)
1251 << ParmDeclarator.getIdentifier();
1253 FTI.ArgInfo[i].Param = Param;
1260 // If we don't have a comma, it is either the end of the list (a ';') or
1261 // an error, bail out.
1262 if (Tok.isNot(tok::comma))
1265 ParmDeclarator.clear();
1267 // Consume the comma.
1268 ParmDeclarator.setCommaLoc(ConsumeToken());
1270 // Parse the next declarator.
1271 ParseDeclarator(ParmDeclarator);
1274 if (ExpectAndConsumeSemi(diag::err_expected_semi_declaration)) {
1275 // Skip to end of block or statement
1276 SkipUntil(tok::semi);
1277 if (Tok.is(tok::semi))
1282 // The actions module must verify that all arguments were declared.
1283 Actions.ActOnFinishKNRParamDeclarations(getCurScope(), D, Tok.getLocation());
1287 /// ParseAsmStringLiteral - This is just a normal string-literal, but is not
1288 /// allowed to be a wide string, and is not subject to character translation.
1290 /// [GNU] asm-string-literal:
1293 Parser::ExprResult Parser::ParseAsmStringLiteral() {
1294 switch (Tok.getKind()) {
1295 case tok::string_literal:
1297 case tok::utf8_string_literal:
1298 case tok::utf16_string_literal:
1299 case tok::utf32_string_literal:
1300 case tok::wide_string_literal: {
1301 SourceLocation L = Tok.getLocation();
1302 Diag(Tok, diag::err_asm_operand_wide_string_literal)
1303 << (Tok.getKind() == tok::wide_string_literal)
1304 << SourceRange(L, L);
1308 Diag(Tok, diag::err_expected_string_literal)
1309 << /*Source='in...'*/0 << "'asm'";
1313 return ParseStringLiteralExpression();
1318 /// [GNU] simple-asm-expr:
1319 /// 'asm' '(' asm-string-literal ')'
1321 Parser::ExprResult Parser::ParseSimpleAsm(SourceLocation *EndLoc) {
1322 assert(Tok.is(tok::kw_asm) && "Not an asm!");
1323 SourceLocation Loc = ConsumeToken();
1325 if (Tok.is(tok::kw_volatile)) {
1326 // Remove from the end of 'asm' to the end of 'volatile'.
1327 SourceRange RemovalRange(PP.getLocForEndOfToken(Loc),
1328 PP.getLocForEndOfToken(Tok.getLocation()));
1330 Diag(Tok, diag::warn_file_asm_volatile)
1331 << FixItHint::CreateRemoval(RemovalRange);
1335 BalancedDelimiterTracker T(*this, tok::l_paren);
1336 if (T.consumeOpen()) {
1337 Diag(Tok, diag::err_expected_lparen_after) << "asm";
1341 ExprResult Result(ParseAsmStringLiteral());
1343 if (Result.isInvalid()) {
1344 SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch);
1346 *EndLoc = Tok.getLocation();
1349 // Close the paren and get the location of the end bracket
1352 *EndLoc = T.getCloseLocation();
1358 /// \brief Get the TemplateIdAnnotation from the token and put it in the
1359 /// cleanup pool so that it gets destroyed when parsing the current top level
1360 /// declaration is finished.
1361 TemplateIdAnnotation *Parser::takeTemplateIdAnnotation(const Token &tok) {
1362 assert(tok.is(tok::annot_template_id) && "Expected template-id token");
1363 TemplateIdAnnotation *
1364 Id = static_cast<TemplateIdAnnotation *>(tok.getAnnotationValue());
1368 void Parser::AnnotateScopeToken(CXXScopeSpec &SS, bool IsNewAnnotation) {
1369 // Push the current token back into the token stream (or revert it if it is
1370 // cached) and use an annotation scope token for current token.
1371 if (PP.isBacktrackEnabled())
1372 PP.RevertCachedTokens(1);
1375 Tok.setKind(tok::annot_cxxscope);
1376 Tok.setAnnotationValue(Actions.SaveNestedNameSpecifierAnnotation(SS));
1377 Tok.setAnnotationRange(SS.getRange());
1379 // In case the tokens were cached, have Preprocessor replace them
1380 // with the annotation token. We don't need to do this if we've
1381 // just reverted back to a prior state.
1382 if (IsNewAnnotation)
1383 PP.AnnotateCachedTokens(Tok);
1386 /// \brief Attempt to classify the name at the current token position. This may
1387 /// form a type, scope or primary expression annotation, or replace the token
1388 /// with a typo-corrected keyword. This is only appropriate when the current
1389 /// name must refer to an entity which has already been declared.
1391 /// \param IsAddressOfOperand Must be \c true if the name is preceded by an '&'
1392 /// and might possibly have a dependent nested name specifier.
1393 /// \param CCC Indicates how to perform typo-correction for this name. If NULL,
1394 /// no typo correction will be performed.
1395 Parser::AnnotatedNameKind
1396 Parser::TryAnnotateName(bool IsAddressOfOperand,
1397 CorrectionCandidateCallback *CCC) {
1398 assert(Tok.is(tok::identifier) || Tok.is(tok::annot_cxxscope));
1400 const bool EnteringContext = false;
1401 const bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
1404 if (getLangOpts().CPlusPlus &&
1405 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
1408 if (Tok.isNot(tok::identifier) || SS.isInvalid()) {
1409 if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, false, SS,
1410 !WasScopeAnnotation))
1412 return ANK_Unresolved;
1415 IdentifierInfo *Name = Tok.getIdentifierInfo();
1416 SourceLocation NameLoc = Tok.getLocation();
1418 // FIXME: Move the tentative declaration logic into ClassifyName so we can
1419 // typo-correct to tentatively-declared identifiers.
1420 if (isTentativelyDeclared(Name)) {
1421 // Identifier has been tentatively declared, and thus cannot be resolved as
1422 // an expression. Fall back to annotating it as a type.
1423 if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, false, SS,
1424 !WasScopeAnnotation))
1426 return Tok.is(tok::annot_typename) ? ANK_Success : ANK_TentativeDecl;
1429 Token Next = NextToken();
1431 // Look up and classify the identifier. We don't perform any typo-correction
1432 // after a scope specifier, because in general we can't recover from typos
1433 // there (eg, after correcting 'A::tempalte B<X>::C', we would need to jump
1434 // back into scope specifier parsing).
1435 Sema::NameClassification Classification
1436 = Actions.ClassifyName(getCurScope(), SS, Name, NameLoc, Next,
1437 IsAddressOfOperand, SS.isEmpty() ? CCC : 0);
1439 switch (Classification.getKind()) {
1440 case Sema::NC_Error:
1443 case Sema::NC_Keyword:
1444 // The identifier was typo-corrected to a keyword.
1445 Tok.setIdentifierInfo(Name);
1446 Tok.setKind(Name->getTokenID());
1447 PP.TypoCorrectToken(Tok);
1448 if (SS.isNotEmpty())
1449 AnnotateScopeToken(SS, !WasScopeAnnotation);
1450 // We've "annotated" this as a keyword.
1453 case Sema::NC_Unknown:
1454 // It's not something we know about. Leave it unannotated.
1458 Tok.setKind(tok::annot_typename);
1459 setTypeAnnotation(Tok, Classification.getType());
1460 Tok.setAnnotationEndLoc(NameLoc);
1461 if (SS.isNotEmpty())
1462 Tok.setLocation(SS.getBeginLoc());
1463 PP.AnnotateCachedTokens(Tok);
1466 case Sema::NC_Expression:
1467 Tok.setKind(tok::annot_primary_expr);
1468 setExprAnnotation(Tok, Classification.getExpression());
1469 Tok.setAnnotationEndLoc(NameLoc);
1470 if (SS.isNotEmpty())
1471 Tok.setLocation(SS.getBeginLoc());
1472 PP.AnnotateCachedTokens(Tok);
1475 case Sema::NC_TypeTemplate:
1476 if (Next.isNot(tok::less)) {
1477 // This may be a type template being used as a template template argument.
1478 if (SS.isNotEmpty())
1479 AnnotateScopeToken(SS, !WasScopeAnnotation);
1480 return ANK_TemplateName;
1483 case Sema::NC_VarTemplate:
1484 case Sema::NC_FunctionTemplate: {
1485 // We have a type, variable or function template followed by '<'.
1488 Id.setIdentifier(Name, NameLoc);
1489 if (AnnotateTemplateIdToken(
1490 TemplateTy::make(Classification.getTemplateName()),
1491 Classification.getTemplateNameKind(), SS, SourceLocation(), Id))
1496 case Sema::NC_NestedNameSpecifier:
1497 llvm_unreachable("already parsed nested name specifier");
1500 // Unable to classify the name, but maybe we can annotate a scope specifier.
1501 if (SS.isNotEmpty())
1502 AnnotateScopeToken(SS, !WasScopeAnnotation);
1503 return ANK_Unresolved;
1506 bool Parser::TryKeywordIdentFallback(bool DisableKeyword) {
1507 assert(Tok.isNot(tok::identifier));
1508 Diag(Tok, diag::ext_keyword_as_ident)
1509 << PP.getSpelling(Tok)
1512 Tok.getIdentifierInfo()->RevertTokenIDToIdentifier();
1513 Tok.setKind(tok::identifier);
1517 /// TryAnnotateTypeOrScopeToken - If the current token position is on a
1518 /// typename (possibly qualified in C++) or a C++ scope specifier not followed
1519 /// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens
1520 /// with a single annotation token representing the typename or C++ scope
1522 /// This simplifies handling of C++ scope specifiers and allows efficient
1523 /// backtracking without the need to re-parse and resolve nested-names and
1525 /// It will mainly be called when we expect to treat identifiers as typenames
1526 /// (if they are typenames). For example, in C we do not expect identifiers
1527 /// inside expressions to be treated as typenames so it will not be called
1528 /// for expressions in C.
1529 /// The benefit for C/ObjC is that a typename will be annotated and
1530 /// Actions.getTypeName will not be needed to be called again (e.g. getTypeName
1531 /// will not be called twice, once to check whether we have a declaration
1532 /// specifier, and another one to get the actual type inside
1533 /// ParseDeclarationSpecifiers).
1535 /// This returns true if an error occurred.
1537 /// Note that this routine emits an error if you call it with ::new or ::delete
1538 /// as the current tokens, so only call it in contexts where these are invalid.
1539 bool Parser::TryAnnotateTypeOrScopeToken(bool EnteringContext, bool NeedType) {
1540 assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon)
1541 || Tok.is(tok::kw_typename) || Tok.is(tok::annot_cxxscope)
1542 || Tok.is(tok::kw_decltype) || Tok.is(tok::annot_template_id))
1543 && "Cannot be a type or scope token!");
1545 if (Tok.is(tok::kw_typename)) {
1546 // MSVC lets you do stuff like:
1547 // typename typedef T_::D D;
1549 // We will consume the typedef token here and put it back after we have
1550 // parsed the first identifier, transforming it into something more like:
1551 // typename T_::D typedef D;
1552 if (getLangOpts().MicrosoftMode && NextToken().is(tok::kw_typedef)) {
1554 PP.Lex(TypedefToken);
1555 bool Result = TryAnnotateTypeOrScopeToken(EnteringContext, NeedType);
1559 Diag(Tok.getLocation(), diag::warn_expected_qualified_after_typename);
1563 // Parse a C++ typename-specifier, e.g., "typename T::type".
1565 // typename-specifier:
1566 // 'typename' '::' [opt] nested-name-specifier identifier
1567 // 'typename' '::' [opt] nested-name-specifier template [opt]
1568 // simple-template-id
1569 SourceLocation TypenameLoc = ConsumeToken();
1571 if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/ParsedType(),
1572 /*EnteringContext=*/false,
1573 0, /*IsTypename*/true))
1576 if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id) ||
1577 Tok.is(tok::annot_decltype)) {
1578 // Attempt to recover by skipping the invalid 'typename'
1579 if (Tok.is(tok::annot_decltype) ||
1580 (!TryAnnotateTypeOrScopeToken(EnteringContext, NeedType) &&
1581 Tok.isAnnotation())) {
1582 unsigned DiagID = diag::err_expected_qualified_after_typename;
1583 // MS compatibility: MSVC permits using known types with typename.
1584 // e.g. "typedef typename T* pointer_type"
1585 if (getLangOpts().MicrosoftExt)
1586 DiagID = diag::warn_expected_qualified_after_typename;
1587 Diag(Tok.getLocation(), DiagID);
1592 Diag(Tok.getLocation(), diag::err_expected_qualified_after_typename);
1597 if (Tok.is(tok::identifier)) {
1598 // FIXME: check whether the next token is '<', first!
1599 Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
1600 *Tok.getIdentifierInfo(),
1602 } else if (Tok.is(tok::annot_template_id)) {
1603 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1604 if (TemplateId->Kind == TNK_Function_template) {
1605 Diag(Tok, diag::err_typename_refers_to_non_type_template)
1606 << Tok.getAnnotationRange();
1610 ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
1611 TemplateId->NumArgs);
1613 Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
1614 TemplateId->TemplateKWLoc,
1615 TemplateId->Template,
1616 TemplateId->TemplateNameLoc,
1617 TemplateId->LAngleLoc,
1619 TemplateId->RAngleLoc);
1621 Diag(Tok, diag::err_expected_type_name_after_typename)
1626 SourceLocation EndLoc = Tok.getLastLoc();
1627 Tok.setKind(tok::annot_typename);
1628 setTypeAnnotation(Tok, Ty.isInvalid() ? ParsedType() : Ty.get());
1629 Tok.setAnnotationEndLoc(EndLoc);
1630 Tok.setLocation(TypenameLoc);
1631 PP.AnnotateCachedTokens(Tok);
1635 // Remembers whether the token was originally a scope annotation.
1636 bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
1639 if (getLangOpts().CPlusPlus)
1640 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
1643 return TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, NeedType,
1644 SS, !WasScopeAnnotation);
1647 /// \brief Try to annotate a type or scope token, having already parsed an
1648 /// optional scope specifier. \p IsNewScope should be \c true unless the scope
1649 /// specifier was extracted from an existing tok::annot_cxxscope annotation.
1650 bool Parser::TryAnnotateTypeOrScopeTokenAfterScopeSpec(bool EnteringContext,
1654 if (Tok.is(tok::identifier)) {
1655 IdentifierInfo *CorrectedII = 0;
1656 // Determine whether the identifier is a type name.
1657 if (ParsedType Ty = Actions.getTypeName(*Tok.getIdentifierInfo(),
1658 Tok.getLocation(), getCurScope(),
1660 NextToken().is(tok::period),
1662 /*IsCtorOrDtorName=*/false,
1663 /*NonTrivialTypeSourceInfo*/true,
1664 NeedType ? &CorrectedII : NULL)) {
1665 // A FixIt was applied as a result of typo correction
1667 Tok.setIdentifierInfo(CorrectedII);
1668 // This is a typename. Replace the current token in-place with an
1669 // annotation type token.
1670 Tok.setKind(tok::annot_typename);
1671 setTypeAnnotation(Tok, Ty);
1672 Tok.setAnnotationEndLoc(Tok.getLocation());
1673 if (SS.isNotEmpty()) // it was a C++ qualified type name.
1674 Tok.setLocation(SS.getBeginLoc());
1676 // In case the tokens were cached, have Preprocessor replace
1677 // them with the annotation token.
1678 PP.AnnotateCachedTokens(Tok);
1682 if (!getLangOpts().CPlusPlus) {
1683 // If we're in C, we can't have :: tokens at all (the lexer won't return
1684 // them). If the identifier is not a type, then it can't be scope either,
1689 // If this is a template-id, annotate with a template-id or type token.
1690 if (NextToken().is(tok::less)) {
1691 TemplateTy Template;
1692 UnqualifiedId TemplateName;
1693 TemplateName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
1694 bool MemberOfUnknownSpecialization;
1695 if (TemplateNameKind TNK
1696 = Actions.isTemplateName(getCurScope(), SS,
1697 /*hasTemplateKeyword=*/false, TemplateName,
1698 /*ObjectType=*/ ParsedType(),
1700 Template, MemberOfUnknownSpecialization)) {
1701 // Consume the identifier.
1703 if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(),
1705 // If an unrecoverable error occurred, we need to return true here,
1706 // because the token stream is in a damaged state. We may not return
1707 // a valid identifier.
1713 // The current token, which is either an identifier or a
1714 // template-id, is not part of the annotation. Fall through to
1715 // push that token back into the stream and complete the C++ scope
1716 // specifier annotation.
1719 if (Tok.is(tok::annot_template_id)) {
1720 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1721 if (TemplateId->Kind == TNK_Type_template) {
1722 // A template-id that refers to a type was parsed into a
1723 // template-id annotation in a context where we weren't allowed
1724 // to produce a type annotation token. Update the template-id
1725 // annotation token to a type annotation token now.
1726 AnnotateTemplateIdTokenAsType();
1728 } else if (TemplateId->Kind == TNK_Var_template)
1735 // A C++ scope specifier that isn't followed by a typename.
1736 AnnotateScopeToken(SS, IsNewScope);
1740 /// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only
1741 /// annotates C++ scope specifiers and template-ids. This returns
1742 /// true if there was an error that could not be recovered from.
1744 /// Note that this routine emits an error if you call it with ::new or ::delete
1745 /// as the current tokens, so only call it in contexts where these are invalid.
1746 bool Parser::TryAnnotateCXXScopeToken(bool EnteringContext) {
1747 assert(getLangOpts().CPlusPlus &&
1748 "Call sites of this function should be guarded by checking for C++");
1749 assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
1750 (Tok.is(tok::annot_template_id) && NextToken().is(tok::coloncolon)) ||
1751 Tok.is(tok::kw_decltype)) && "Cannot be a type or scope token!");
1754 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
1759 AnnotateScopeToken(SS, true);
1763 bool Parser::isTokenEqualOrEqualTypo() {
1764 tok::TokenKind Kind = Tok.getKind();
1768 case tok::ampequal: // &=
1769 case tok::starequal: // *=
1770 case tok::plusequal: // +=
1771 case tok::minusequal: // -=
1772 case tok::exclaimequal: // !=
1773 case tok::slashequal: // /=
1774 case tok::percentequal: // %=
1775 case tok::lessequal: // <=
1776 case tok::lesslessequal: // <<=
1777 case tok::greaterequal: // >=
1778 case tok::greatergreaterequal: // >>=
1779 case tok::caretequal: // ^=
1780 case tok::pipeequal: // |=
1781 case tok::equalequal: // ==
1782 Diag(Tok, diag::err_invalid_token_after_declarator_suggest_equal)
1783 << getTokenSimpleSpelling(Kind)
1784 << FixItHint::CreateReplacement(SourceRange(Tok.getLocation()), "=");
1790 SourceLocation Parser::handleUnexpectedCodeCompletionToken() {
1791 assert(Tok.is(tok::code_completion));
1792 PrevTokLocation = Tok.getLocation();
1794 for (Scope *S = getCurScope(); S; S = S->getParent()) {
1795 if (S->getFlags() & Scope::FnScope) {
1796 Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_RecoveryInFunction);
1798 return PrevTokLocation;
1801 if (S->getFlags() & Scope::ClassScope) {
1802 Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Class);
1804 return PrevTokLocation;
1808 Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Namespace);
1810 return PrevTokLocation;
1813 // Anchor the Parser::FieldCallback vtable to this translation unit.
1814 // We use a spurious method instead of the destructor because
1815 // destroying FieldCallbacks can actually be slightly
1816 // performance-sensitive.
1817 void Parser::FieldCallback::_anchor() {
1820 // Code-completion pass-through functions
1822 void Parser::CodeCompleteDirective(bool InConditional) {
1823 Actions.CodeCompletePreprocessorDirective(InConditional);
1826 void Parser::CodeCompleteInConditionalExclusion() {
1827 Actions.CodeCompleteInPreprocessorConditionalExclusion(getCurScope());
1830 void Parser::CodeCompleteMacroName(bool IsDefinition) {
1831 Actions.CodeCompletePreprocessorMacroName(IsDefinition);
1834 void Parser::CodeCompletePreprocessorExpression() {
1835 Actions.CodeCompletePreprocessorExpression();
1838 void Parser::CodeCompleteMacroArgument(IdentifierInfo *Macro,
1839 MacroInfo *MacroInfo,
1840 unsigned ArgumentIndex) {
1841 Actions.CodeCompletePreprocessorMacroArgument(getCurScope(), Macro, MacroInfo,
1845 void Parser::CodeCompleteNaturalLanguage() {
1846 Actions.CodeCompleteNaturalLanguage();
1849 bool Parser::ParseMicrosoftIfExistsCondition(IfExistsCondition& Result) {
1850 assert((Tok.is(tok::kw___if_exists) || Tok.is(tok::kw___if_not_exists)) &&
1851 "Expected '__if_exists' or '__if_not_exists'");
1852 Result.IsIfExists = Tok.is(tok::kw___if_exists);
1853 Result.KeywordLoc = ConsumeToken();
1855 BalancedDelimiterTracker T(*this, tok::l_paren);
1856 if (T.consumeOpen()) {
1857 Diag(Tok, diag::err_expected_lparen_after)
1858 << (Result.IsIfExists? "__if_exists" : "__if_not_exists");
1862 // Parse nested-name-specifier.
1863 ParseOptionalCXXScopeSpecifier(Result.SS, ParsedType(),
1864 /*EnteringContext=*/false);
1866 // Check nested-name specifier.
1867 if (Result.SS.isInvalid()) {
1872 // Parse the unqualified-id.
1873 SourceLocation TemplateKWLoc; // FIXME: parsed, but unused.
1874 if (ParseUnqualifiedId(Result.SS, false, true, true, ParsedType(),
1875 TemplateKWLoc, Result.Name)) {
1880 if (T.consumeClose())
1883 // Check if the symbol exists.
1884 switch (Actions.CheckMicrosoftIfExistsSymbol(getCurScope(), Result.KeywordLoc,
1885 Result.IsIfExists, Result.SS,
1887 case Sema::IER_Exists:
1888 Result.Behavior = Result.IsIfExists ? IEB_Parse : IEB_Skip;
1891 case Sema::IER_DoesNotExist:
1892 Result.Behavior = !Result.IsIfExists ? IEB_Parse : IEB_Skip;
1895 case Sema::IER_Dependent:
1896 Result.Behavior = IEB_Dependent;
1899 case Sema::IER_Error:
1906 void Parser::ParseMicrosoftIfExistsExternalDeclaration() {
1907 IfExistsCondition Result;
1908 if (ParseMicrosoftIfExistsCondition(Result))
1911 BalancedDelimiterTracker Braces(*this, tok::l_brace);
1912 if (Braces.consumeOpen()) {
1913 Diag(Tok, diag::err_expected_lbrace);
1917 switch (Result.Behavior) {
1919 // Parse declarations below.
1923 llvm_unreachable("Cannot have a dependent external declaration");
1930 // Parse the declarations.
1931 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) {
1932 ParsedAttributesWithRange attrs(AttrFactory);
1933 MaybeParseCXX11Attributes(attrs);
1934 MaybeParseMicrosoftAttributes(attrs);
1935 DeclGroupPtrTy Result = ParseExternalDeclaration(attrs);
1936 if (Result && !getCurScope()->getParent())
1937 Actions.getASTConsumer().HandleTopLevelDecl(Result.get());
1939 Braces.consumeClose();
1942 Parser::DeclGroupPtrTy Parser::ParseModuleImport(SourceLocation AtLoc) {
1943 assert(Tok.isObjCAtKeyword(tok::objc_import) &&
1944 "Improper start to module import");
1945 SourceLocation ImportLoc = ConsumeToken();
1947 SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 2> Path;
1949 // Parse the module path.
1951 if (!Tok.is(tok::identifier)) {
1952 if (Tok.is(tok::code_completion)) {
1953 Actions.CodeCompleteModuleImport(ImportLoc, Path);
1954 ConsumeCodeCompletionToken();
1955 SkipUntil(tok::semi);
1956 return DeclGroupPtrTy();
1959 Diag(Tok, diag::err_module_expected_ident);
1960 SkipUntil(tok::semi);
1961 return DeclGroupPtrTy();
1964 // Record this part of the module path.
1965 Path.push_back(std::make_pair(Tok.getIdentifierInfo(), Tok.getLocation()));
1968 if (Tok.is(tok::period)) {
1976 if (PP.hadModuleLoaderFatalFailure()) {
1977 // With a fatal failure in the module loader, we abort parsing.
1979 return DeclGroupPtrTy();
1982 DeclResult Import = Actions.ActOnModuleImport(AtLoc, ImportLoc, Path);
1983 ExpectAndConsumeSemi(diag::err_module_expected_semi);
1984 if (Import.isInvalid())
1985 return DeclGroupPtrTy();
1987 return Actions.ConvertDeclToDeclGroup(Import.get());
1990 bool BalancedDelimiterTracker::diagnoseOverflow() {
1991 P.Diag(P.Tok, diag::err_bracket_depth_exceeded)
1992 << P.getLangOpts().BracketDepth;
1993 P.Diag(P.Tok, diag::note_bracket_depth);
1994 P.SkipUntil(tok::eof);
1998 bool BalancedDelimiterTracker::expectAndConsume(unsigned DiagID,
2000 tok::TokenKind SkipToToc ) {
2001 LOpen = P.Tok.getLocation();
2002 if (P.ExpectAndConsume(Kind, DiagID, Msg, SkipToToc))
2005 if (getDepth() < MaxDepth)
2008 return diagnoseOverflow();
2011 bool BalancedDelimiterTracker::diagnoseMissingClose() {
2012 assert(!P.Tok.is(Close) && "Should have consumed closing delimiter");
2014 const char *LHSName = "unknown";
2017 default: llvm_unreachable("Unexpected balanced token");
2018 case tok::r_paren : LHSName = "("; DID = diag::err_expected_rparen; break;
2019 case tok::r_brace : LHSName = "{"; DID = diag::err_expected_rbrace; break;
2020 case tok::r_square: LHSName = "["; DID = diag::err_expected_rsquare; break;
2023 P.Diag(LOpen, diag::note_matching) << LHSName;
2025 // If we're not already at some kind of closing bracket, skip to our closing
2027 if (P.Tok.isNot(tok::r_paren) && P.Tok.isNot(tok::r_brace) &&
2028 P.Tok.isNot(tok::r_square) &&
2029 P.SkipUntil(Close, FinalToken,
2030 Parser::StopAtSemi | Parser::StopBeforeMatch) &&
2032 LClose = P.ConsumeAnyToken();
2036 void BalancedDelimiterTracker::skipToEnd() {
2037 P.SkipUntil(Close, Parser::StopBeforeMatch);