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 "RAIIObjectsForParser.h"
16 #include "clang/AST/ASTConsumer.h"
17 #include "clang/AST/ASTContext.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 bool HandleComment(Preprocessor &PP, SourceRange Comment) override {
37 S.ActOnComment(Comment);
42 /// \brief RAIIObject to destroy the contents of a SmallVector of
43 /// TemplateIdAnnotation pointers and clear the vector.
44 class DestroyTemplateIdAnnotationsRAIIObj {
45 SmallVectorImpl<TemplateIdAnnotation *> &Container;
48 DestroyTemplateIdAnnotationsRAIIObj(
49 SmallVectorImpl<TemplateIdAnnotation *> &Container)
50 : Container(Container) {}
52 ~DestroyTemplateIdAnnotationsRAIIObj() {
53 for (SmallVectorImpl<TemplateIdAnnotation *>::iterator I =
61 } // end anonymous namespace
63 IdentifierInfo *Parser::getSEHExceptKeyword() {
64 // __except is accepted as a (contextual) keyword
65 if (!Ident__except && (getLangOpts().MicrosoftExt || getLangOpts().Borland))
66 Ident__except = PP.getIdentifierInfo("__except");
71 Parser::Parser(Preprocessor &pp, Sema &actions, bool skipFunctionBodies)
72 : PP(pp), Actions(actions), Diags(PP.getDiagnostics()),
73 GreaterThanIsOperator(true), ColonIsSacred(false),
74 InMessageExpression(false), TemplateParameterDepth(0),
75 ParsingInObjCContainer(false) {
76 SkipFunctionBodies = pp.isCodeCompletionEnabled() || skipFunctionBodies;
78 Tok.setKind(tok::eof);
79 Actions.CurScope = nullptr;
81 ParenCount = BracketCount = BraceCount = 0;
82 CurParsedObjCImpl = nullptr;
84 // Add #pragma handlers. These are removed and destroyed in the
86 initializePragmaHandlers();
88 CommentSemaHandler.reset(new ActionCommentHandler(actions));
89 PP.addCommentHandler(CommentSemaHandler.get());
91 PP.setCodeCompletionHandler(*this);
94 DiagnosticBuilder Parser::Diag(SourceLocation Loc, unsigned DiagID) {
95 return Diags.Report(Loc, DiagID);
98 DiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) {
99 return Diag(Tok.getLocation(), DiagID);
102 /// \brief Emits a diagnostic suggesting parentheses surrounding a
105 /// \param Loc The location where we'll emit the diagnostic.
106 /// \param DK The kind of diagnostic to emit.
107 /// \param ParenRange Source range enclosing code that should be parenthesized.
108 void Parser::SuggestParentheses(SourceLocation Loc, unsigned DK,
109 SourceRange ParenRange) {
110 SourceLocation EndLoc = PP.getLocForEndOfToken(ParenRange.getEnd());
111 if (!ParenRange.getEnd().isFileID() || EndLoc.isInvalid()) {
112 // We can't display the parentheses, so just dig the
113 // warning/error and return.
119 << FixItHint::CreateInsertion(ParenRange.getBegin(), "(")
120 << FixItHint::CreateInsertion(EndLoc, ")");
123 static bool IsCommonTypo(tok::TokenKind ExpectedTok, const Token &Tok) {
124 switch (ExpectedTok) {
126 return Tok.is(tok::colon) || Tok.is(tok::comma); // : or , for ;
127 default: return false;
131 bool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID,
133 if (Tok.is(ExpectedTok) || Tok.is(tok::code_completion)) {
138 // Detect common single-character typos and resume.
139 if (IsCommonTypo(ExpectedTok, Tok)) {
140 SourceLocation Loc = Tok.getLocation();
142 DiagnosticBuilder DB = Diag(Loc, DiagID);
143 DB << FixItHint::CreateReplacement(
144 SourceRange(Loc), tok::getPunctuatorSpelling(ExpectedTok));
145 if (DiagID == diag::err_expected)
147 else if (DiagID == diag::err_expected_after)
148 DB << Msg << ExpectedTok;
153 // Pretend there wasn't a problem.
158 SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation);
159 const char *Spelling = nullptr;
160 if (EndLoc.isValid())
161 Spelling = tok::getPunctuatorSpelling(ExpectedTok);
163 DiagnosticBuilder DB =
165 ? Diag(EndLoc, DiagID) << FixItHint::CreateInsertion(EndLoc, Spelling)
167 if (DiagID == diag::err_expected)
169 else if (DiagID == diag::err_expected_after)
170 DB << Msg << ExpectedTok;
177 bool Parser::ExpectAndConsumeSemi(unsigned DiagID) {
178 if (TryConsumeToken(tok::semi))
181 if (Tok.is(tok::code_completion)) {
182 handleUnexpectedCodeCompletionToken();
186 if ((Tok.is(tok::r_paren) || Tok.is(tok::r_square)) &&
187 NextToken().is(tok::semi)) {
188 Diag(Tok, diag::err_extraneous_token_before_semi)
189 << PP.getSpelling(Tok)
190 << FixItHint::CreateRemoval(Tok.getLocation());
191 ConsumeAnyToken(); // The ')' or ']'.
192 ConsumeToken(); // The ';'.
196 return ExpectAndConsume(tok::semi, DiagID);
199 void Parser::ConsumeExtraSemi(ExtraSemiKind Kind, unsigned TST) {
200 if (!Tok.is(tok::semi)) return;
202 bool HadMultipleSemis = false;
203 SourceLocation StartLoc = Tok.getLocation();
204 SourceLocation EndLoc = Tok.getLocation();
207 while ((Tok.is(tok::semi) && !Tok.isAtStartOfLine())) {
208 HadMultipleSemis = true;
209 EndLoc = Tok.getLocation();
213 // C++11 allows extra semicolons at namespace scope, but not in any of the
215 if (Kind == OutsideFunction && getLangOpts().CPlusPlus) {
216 if (getLangOpts().CPlusPlus11)
217 Diag(StartLoc, diag::warn_cxx98_compat_top_level_semi)
218 << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
220 Diag(StartLoc, diag::ext_extra_semi_cxx11)
221 << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
225 if (Kind != AfterMemberFunctionDefinition || HadMultipleSemis)
226 Diag(StartLoc, diag::ext_extra_semi)
227 << Kind << DeclSpec::getSpecifierName((DeclSpec::TST)TST,
228 Actions.getASTContext().getPrintingPolicy())
229 << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
231 // A single semicolon is valid after a member function definition.
232 Diag(StartLoc, diag::warn_extra_semi_after_mem_fn_def)
233 << FixItHint::CreateRemoval(SourceRange(StartLoc, EndLoc));
236 //===----------------------------------------------------------------------===//
238 //===----------------------------------------------------------------------===//
240 static bool HasFlagsSet(Parser::SkipUntilFlags L, Parser::SkipUntilFlags R) {
241 return (static_cast<unsigned>(L) & static_cast<unsigned>(R)) != 0;
244 /// SkipUntil - Read tokens until we get to the specified token, then consume
245 /// it (unless no flag StopBeforeMatch). Because we cannot guarantee that the
246 /// token will ever occur, this skips to the next token, or to some likely
247 /// good stopping point. If StopAtSemi is true, skipping will stop at a ';'
250 /// If SkipUntil finds the specified token, it returns true, otherwise it
252 bool Parser::SkipUntil(ArrayRef<tok::TokenKind> Toks, SkipUntilFlags Flags) {
253 // We always want this function to skip at least one token if the first token
254 // isn't T and if not at EOF.
255 bool isFirstTokenSkipped = true;
257 // If we found one of the tokens, stop and return true.
258 for (unsigned i = 0, NumToks = Toks.size(); i != NumToks; ++i) {
259 if (Tok.is(Toks[i])) {
260 if (HasFlagsSet(Flags, StopBeforeMatch)) {
261 // Noop, don't consume the token.
269 // Important special case: The caller has given up and just wants us to
270 // skip the rest of the file. Do this without recursing, since we can
271 // get here precisely because the caller detected too much recursion.
272 if (Toks.size() == 1 && Toks[0] == tok::eof &&
273 !HasFlagsSet(Flags, StopAtSemi) &&
274 !HasFlagsSet(Flags, StopAtCodeCompletion)) {
275 while (Tok.isNot(tok::eof))
280 switch (Tok.getKind()) {
282 // Ran out of tokens.
285 case tok::annot_pragma_openmp_end:
286 // Stop before an OpenMP pragma boundary.
287 case tok::annot_module_begin:
288 case tok::annot_module_end:
289 case tok::annot_module_include:
290 // Stop before we change submodules. They generally indicate a "good"
291 // place to pick up parsing again (except in the special case where
292 // we're trying to skip to EOF).
295 case tok::code_completion:
296 if (!HasFlagsSet(Flags, StopAtCodeCompletion))
297 handleUnexpectedCodeCompletionToken();
301 // Recursively skip properly-nested parens.
303 if (HasFlagsSet(Flags, StopAtCodeCompletion))
304 SkipUntil(tok::r_paren, StopAtCodeCompletion);
306 SkipUntil(tok::r_paren);
309 // Recursively skip properly-nested square brackets.
311 if (HasFlagsSet(Flags, StopAtCodeCompletion))
312 SkipUntil(tok::r_square, StopAtCodeCompletion);
314 SkipUntil(tok::r_square);
317 // Recursively skip properly-nested braces.
319 if (HasFlagsSet(Flags, StopAtCodeCompletion))
320 SkipUntil(tok::r_brace, StopAtCodeCompletion);
322 SkipUntil(tok::r_brace);
325 // Okay, we found a ']' or '}' or ')', which we think should be balanced.
326 // Since the user wasn't looking for this token (if they were, it would
327 // already be handled), this isn't balanced. If there is a LHS token at a
328 // higher level, we will assume that this matches the unbalanced token
329 // and return it. Otherwise, this is a spurious RHS token, which we skip.
331 if (ParenCount && !isFirstTokenSkipped)
332 return false; // Matches something.
336 if (BracketCount && !isFirstTokenSkipped)
337 return false; // Matches something.
341 if (BraceCount && !isFirstTokenSkipped)
342 return false; // Matches something.
346 case tok::string_literal:
347 case tok::wide_string_literal:
348 case tok::utf8_string_literal:
349 case tok::utf16_string_literal:
350 case tok::utf32_string_literal:
351 ConsumeStringToken();
355 if (HasFlagsSet(Flags, StopAtSemi))
363 isFirstTokenSkipped = false;
367 //===----------------------------------------------------------------------===//
368 // Scope manipulation
369 //===----------------------------------------------------------------------===//
371 /// EnterScope - Start a new scope.
372 void Parser::EnterScope(unsigned ScopeFlags) {
373 if (NumCachedScopes) {
374 Scope *N = ScopeCache[--NumCachedScopes];
375 N->Init(getCurScope(), ScopeFlags);
376 Actions.CurScope = N;
378 Actions.CurScope = new Scope(getCurScope(), ScopeFlags, Diags);
382 /// ExitScope - Pop a scope off the scope stack.
383 void Parser::ExitScope() {
384 assert(getCurScope() && "Scope imbalance!");
386 // Inform the actions module that this scope is going away if there are any
388 Actions.ActOnPopScope(Tok.getLocation(), getCurScope());
390 Scope *OldScope = getCurScope();
391 Actions.CurScope = OldScope->getParent();
393 if (NumCachedScopes == ScopeCacheSize)
396 ScopeCache[NumCachedScopes++] = OldScope;
399 /// Set the flags for the current scope to ScopeFlags. If ManageFlags is false,
400 /// this object does nothing.
401 Parser::ParseScopeFlags::ParseScopeFlags(Parser *Self, unsigned ScopeFlags,
403 : CurScope(ManageFlags ? Self->getCurScope() : nullptr) {
405 OldFlags = CurScope->getFlags();
406 CurScope->setFlags(ScopeFlags);
410 /// Restore the flags for the current scope to what they were before this
411 /// object overrode them.
412 Parser::ParseScopeFlags::~ParseScopeFlags() {
414 CurScope->setFlags(OldFlags);
418 //===----------------------------------------------------------------------===//
419 // C99 6.9: External Definitions.
420 //===----------------------------------------------------------------------===//
423 // If we still have scopes active, delete the scope tree.
424 delete getCurScope();
425 Actions.CurScope = nullptr;
427 // Free the scope cache.
428 for (unsigned i = 0, e = NumCachedScopes; i != e; ++i)
429 delete ScopeCache[i];
431 resetPragmaHandlers();
433 PP.removeCommentHandler(CommentSemaHandler.get());
435 PP.clearCodeCompletionHandler();
437 if (getLangOpts().DelayedTemplateParsing &&
438 !PP.isIncrementalProcessingEnabled() && !TemplateIds.empty()) {
439 // If an ASTConsumer parsed delay-parsed templates in their
440 // HandleTranslationUnit() method, TemplateIds created there were not
441 // guarded by a DestroyTemplateIdAnnotationsRAIIObj object in
442 // ParseTopLevelDecl(). Destroy them here.
443 DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
446 assert(TemplateIds.empty() && "Still alive TemplateIdAnnotations around?");
449 /// Initialize - Warm up the parser.
451 void Parser::Initialize() {
452 // Create the translation unit scope. Install it as the current scope.
453 assert(getCurScope() == nullptr && "A scope is already active?");
454 EnterScope(Scope::DeclScope);
455 Actions.ActOnTranslationUnitScope(getCurScope());
457 // Initialization for Objective-C context sensitive keywords recognition.
458 // Referenced in Parser::ParseObjCTypeQualifierList.
459 if (getLangOpts().ObjC1) {
460 ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in");
461 ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out");
462 ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout");
463 ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway");
464 ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy");
465 ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref");
466 ObjCTypeQuals[objc_nonnull] = &PP.getIdentifierTable().get("nonnull");
467 ObjCTypeQuals[objc_nullable] = &PP.getIdentifierTable().get("nullable");
468 ObjCTypeQuals[objc_null_unspecified]
469 = &PP.getIdentifierTable().get("null_unspecified");
472 Ident_instancetype = nullptr;
473 Ident_final = nullptr;
474 Ident_sealed = nullptr;
475 Ident_override = nullptr;
477 Ident_super = &PP.getIdentifierTable().get("super");
479 Ident_vector = nullptr;
480 Ident_bool = nullptr;
481 Ident_pixel = nullptr;
482 if (getLangOpts().AltiVec || getLangOpts().ZVector) {
483 Ident_vector = &PP.getIdentifierTable().get("vector");
484 Ident_bool = &PP.getIdentifierTable().get("bool");
486 if (getLangOpts().AltiVec)
487 Ident_pixel = &PP.getIdentifierTable().get("pixel");
489 Ident_introduced = nullptr;
490 Ident_deprecated = nullptr;
491 Ident_obsoleted = nullptr;
492 Ident_unavailable = nullptr;
494 Ident__except = nullptr;
496 Ident__exception_code = Ident__exception_info = nullptr;
497 Ident__abnormal_termination = Ident___exception_code = nullptr;
498 Ident___exception_info = Ident___abnormal_termination = nullptr;
499 Ident_GetExceptionCode = Ident_GetExceptionInfo = nullptr;
500 Ident_AbnormalTermination = nullptr;
502 if(getLangOpts().Borland) {
503 Ident__exception_info = PP.getIdentifierInfo("_exception_info");
504 Ident___exception_info = PP.getIdentifierInfo("__exception_info");
505 Ident_GetExceptionInfo = PP.getIdentifierInfo("GetExceptionInformation");
506 Ident__exception_code = PP.getIdentifierInfo("_exception_code");
507 Ident___exception_code = PP.getIdentifierInfo("__exception_code");
508 Ident_GetExceptionCode = PP.getIdentifierInfo("GetExceptionCode");
509 Ident__abnormal_termination = PP.getIdentifierInfo("_abnormal_termination");
510 Ident___abnormal_termination = PP.getIdentifierInfo("__abnormal_termination");
511 Ident_AbnormalTermination = PP.getIdentifierInfo("AbnormalTermination");
513 PP.SetPoisonReason(Ident__exception_code,diag::err_seh___except_block);
514 PP.SetPoisonReason(Ident___exception_code,diag::err_seh___except_block);
515 PP.SetPoisonReason(Ident_GetExceptionCode,diag::err_seh___except_block);
516 PP.SetPoisonReason(Ident__exception_info,diag::err_seh___except_filter);
517 PP.SetPoisonReason(Ident___exception_info,diag::err_seh___except_filter);
518 PP.SetPoisonReason(Ident_GetExceptionInfo,diag::err_seh___except_filter);
519 PP.SetPoisonReason(Ident__abnormal_termination,diag::err_seh___finally_block);
520 PP.SetPoisonReason(Ident___abnormal_termination,diag::err_seh___finally_block);
521 PP.SetPoisonReason(Ident_AbnormalTermination,diag::err_seh___finally_block);
524 Actions.Initialize();
526 // Prime the lexer look-ahead.
530 void Parser::LateTemplateParserCleanupCallback(void *P) {
531 // While this RAII helper doesn't bracket any actual work, the destructor will
532 // clean up annotations that were created during ActOnEndOfTranslationUnit
533 // when incremental processing is enabled.
534 DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(((Parser *)P)->TemplateIds);
537 /// ParseTopLevelDecl - Parse one top-level declaration, return whatever the
538 /// action tells us to. This returns true if the EOF was encountered.
539 bool Parser::ParseTopLevelDecl(DeclGroupPtrTy &Result) {
540 DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
542 // Skip over the EOF token, flagging end of previous input for incremental
544 if (PP.isIncrementalProcessingEnabled() && Tok.is(tok::eof))
547 Result = DeclGroupPtrTy();
548 switch (Tok.getKind()) {
549 case tok::annot_pragma_unused:
550 HandlePragmaUnused();
553 case tok::annot_module_include:
554 Actions.ActOnModuleInclude(Tok.getLocation(),
555 reinterpret_cast<Module *>(
556 Tok.getAnnotationValue()));
560 case tok::annot_module_begin:
561 Actions.ActOnModuleBegin(Tok.getLocation(), reinterpret_cast<Module *>(
562 Tok.getAnnotationValue()));
566 case tok::annot_module_end:
567 Actions.ActOnModuleEnd(Tok.getLocation(), reinterpret_cast<Module *>(
568 Tok.getAnnotationValue()));
573 // Late template parsing can begin.
574 if (getLangOpts().DelayedTemplateParsing)
575 Actions.SetLateTemplateParser(LateTemplateParserCallback,
576 PP.isIncrementalProcessingEnabled() ?
577 LateTemplateParserCleanupCallback : nullptr,
579 if (!PP.isIncrementalProcessingEnabled())
580 Actions.ActOnEndOfTranslationUnit();
581 //else don't tell Sema that we ended parsing: more input might come.
588 ParsedAttributesWithRange attrs(AttrFactory);
589 MaybeParseCXX11Attributes(attrs);
590 MaybeParseMicrosoftAttributes(attrs);
592 Result = ParseExternalDeclaration(attrs);
596 /// ParseExternalDeclaration:
598 /// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl]
599 /// function-definition
601 /// [GNU] asm-definition
602 /// [GNU] __extension__ external-declaration
603 /// [OBJC] objc-class-definition
604 /// [OBJC] objc-class-declaration
605 /// [OBJC] objc-alias-declaration
606 /// [OBJC] objc-protocol-definition
607 /// [OBJC] objc-method-definition
609 /// [C++] linkage-specification
610 /// [GNU] asm-definition:
611 /// simple-asm-expr ';'
612 /// [C++11] empty-declaration
613 /// [C++11] attribute-declaration
615 /// [C++11] empty-declaration:
618 /// [C++0x/GNU] 'extern' 'template' declaration
619 Parser::DeclGroupPtrTy
620 Parser::ParseExternalDeclaration(ParsedAttributesWithRange &attrs,
621 ParsingDeclSpec *DS) {
622 DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
623 ParenBraceBracketBalancer BalancerRAIIObj(*this);
625 if (PP.isCodeCompletionReached()) {
627 return DeclGroupPtrTy();
630 Decl *SingleDecl = nullptr;
631 switch (Tok.getKind()) {
632 case tok::annot_pragma_vis:
633 HandlePragmaVisibility();
634 return DeclGroupPtrTy();
635 case tok::annot_pragma_pack:
637 return DeclGroupPtrTy();
638 case tok::annot_pragma_msstruct:
639 HandlePragmaMSStruct();
640 return DeclGroupPtrTy();
641 case tok::annot_pragma_align:
643 return DeclGroupPtrTy();
644 case tok::annot_pragma_weak:
646 return DeclGroupPtrTy();
647 case tok::annot_pragma_weakalias:
648 HandlePragmaWeakAlias();
649 return DeclGroupPtrTy();
650 case tok::annot_pragma_redefine_extname:
651 HandlePragmaRedefineExtname();
652 return DeclGroupPtrTy();
653 case tok::annot_pragma_fp_contract:
654 HandlePragmaFPContract();
655 return DeclGroupPtrTy();
656 case tok::annot_pragma_opencl_extension:
657 HandlePragmaOpenCLExtension();
658 return DeclGroupPtrTy();
659 case tok::annot_pragma_openmp:
660 return ParseOpenMPDeclarativeDirective();
661 case tok::annot_pragma_ms_pointers_to_members:
662 HandlePragmaMSPointersToMembers();
663 return DeclGroupPtrTy();
664 case tok::annot_pragma_ms_vtordisp:
665 HandlePragmaMSVtorDisp();
666 return DeclGroupPtrTy();
667 case tok::annot_pragma_ms_pragma:
668 HandlePragmaMSPragma();
669 return DeclGroupPtrTy();
671 // Either a C++11 empty-declaration or attribute-declaration.
672 SingleDecl = Actions.ActOnEmptyDeclaration(getCurScope(),
675 ConsumeExtraSemi(OutsideFunction);
678 Diag(Tok, diag::err_extraneous_closing_brace);
680 return DeclGroupPtrTy();
682 Diag(Tok, diag::err_expected_external_declaration);
683 return DeclGroupPtrTy();
684 case tok::kw___extension__: {
685 // __extension__ silences extension warnings in the subexpression.
686 ExtensionRAIIObject O(Diags); // Use RAII to do this.
688 return ParseExternalDeclaration(attrs);
691 ProhibitAttributes(attrs);
693 SourceLocation StartLoc = Tok.getLocation();
694 SourceLocation EndLoc;
696 ExprResult Result(ParseSimpleAsm(&EndLoc));
698 // Check if GNU-style InlineAsm is disabled.
699 // Empty asm string is allowed because it will not introduce
700 // any assembly code.
701 if (!(getLangOpts().GNUAsm || Result.isInvalid())) {
702 const auto *SL = cast<StringLiteral>(Result.get());
703 if (!SL->getString().trim().empty())
704 Diag(StartLoc, diag::err_gnu_inline_asm_disabled);
707 ExpectAndConsume(tok::semi, diag::err_expected_after,
708 "top-level asm block");
710 if (Result.isInvalid())
711 return DeclGroupPtrTy();
712 SingleDecl = Actions.ActOnFileScopeAsmDecl(Result.get(), StartLoc, EndLoc);
716 return ParseObjCAtDirectives();
719 if (!getLangOpts().ObjC1) {
720 Diag(Tok, diag::err_expected_external_declaration);
722 return DeclGroupPtrTy();
724 SingleDecl = ParseObjCMethodDefinition();
726 case tok::code_completion:
727 Actions.CodeCompleteOrdinaryName(getCurScope(),
728 CurParsedObjCImpl? Sema::PCC_ObjCImplementation
729 : Sema::PCC_Namespace);
731 return DeclGroupPtrTy();
733 case tok::kw_namespace:
734 case tok::kw_typedef:
735 case tok::kw_template:
736 case tok::kw_export: // As in 'export template'
737 case tok::kw_static_assert:
738 case tok::kw__Static_assert:
739 // A function definition cannot start with any of these keywords.
741 SourceLocation DeclEnd;
742 return ParseDeclaration(Declarator::FileContext, DeclEnd, attrs);
746 // Parse (then ignore) 'static' prior to a template instantiation. This is
747 // a GCC extension that we intentionally do not support.
748 if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
749 Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
751 SourceLocation DeclEnd;
752 return ParseDeclaration(Declarator::FileContext, DeclEnd, attrs);
757 if (getLangOpts().CPlusPlus) {
758 tok::TokenKind NextKind = NextToken().getKind();
760 // Inline namespaces. Allowed as an extension even in C++03.
761 if (NextKind == tok::kw_namespace) {
762 SourceLocation DeclEnd;
763 return ParseDeclaration(Declarator::FileContext, DeclEnd, attrs);
766 // Parse (then ignore) 'inline' prior to a template instantiation. This is
767 // a GCC extension that we intentionally do not support.
768 if (NextKind == tok::kw_template) {
769 Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
771 SourceLocation DeclEnd;
772 return ParseDeclaration(Declarator::FileContext, DeclEnd, attrs);
778 if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
780 SourceLocation ExternLoc = ConsumeToken();
781 SourceLocation TemplateLoc = ConsumeToken();
782 Diag(ExternLoc, getLangOpts().CPlusPlus11 ?
783 diag::warn_cxx98_compat_extern_template :
784 diag::ext_extern_template) << SourceRange(ExternLoc, TemplateLoc);
785 SourceLocation DeclEnd;
786 return Actions.ConvertDeclToDeclGroup(
787 ParseExplicitInstantiation(Declarator::FileContext,
788 ExternLoc, TemplateLoc, DeclEnd));
792 case tok::kw___if_exists:
793 case tok::kw___if_not_exists:
794 ParseMicrosoftIfExistsExternalDeclaration();
795 return DeclGroupPtrTy();
799 // We can't tell whether this is a function-definition or declaration yet.
800 return ParseDeclarationOrFunctionDefinition(attrs, DS);
803 // This routine returns a DeclGroup, if the thing we parsed only contains a
804 // single decl, convert it now.
805 return Actions.ConvertDeclToDeclGroup(SingleDecl);
808 /// \brief Determine whether the current token, if it occurs after a
809 /// declarator, continues a declaration or declaration list.
810 bool Parser::isDeclarationAfterDeclarator() {
811 // Check for '= delete' or '= default'
812 if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
813 const Token &KW = NextToken();
814 if (KW.is(tok::kw_default) || KW.is(tok::kw_delete))
818 return Tok.is(tok::equal) || // int X()= -> not a function def
819 Tok.is(tok::comma) || // int X(), -> not a function def
820 Tok.is(tok::semi) || // int X(); -> not a function def
821 Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def
822 Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def
823 (getLangOpts().CPlusPlus &&
824 Tok.is(tok::l_paren)); // int X(0) -> not a function def [C++]
827 /// \brief Determine whether the current token, if it occurs after a
828 /// declarator, indicates the start of a function definition.
829 bool Parser::isStartOfFunctionDefinition(const ParsingDeclarator &Declarator) {
830 assert(Declarator.isFunctionDeclarator() && "Isn't a function declarator");
831 if (Tok.is(tok::l_brace)) // int X() {}
834 // Handle K&R C argument lists: int X(f) int f; {}
835 if (!getLangOpts().CPlusPlus &&
836 Declarator.getFunctionTypeInfo().isKNRPrototype())
837 return isDeclarationSpecifier();
839 if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
840 const Token &KW = NextToken();
841 return KW.is(tok::kw_default) || KW.is(tok::kw_delete);
844 return Tok.is(tok::colon) || // X() : Base() {} (used for ctors)
845 Tok.is(tok::kw_try); // X() try { ... }
848 /// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or
849 /// a declaration. We can't tell which we have until we read up to the
850 /// compound-statement in function-definition. TemplateParams, if
851 /// non-NULL, provides the template parameters when we're parsing a
852 /// C++ template-declaration.
854 /// function-definition: [C99 6.9.1]
855 /// decl-specs declarator declaration-list[opt] compound-statement
856 /// [C90] function-definition: [C99 6.7.1] - implicit int result
857 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
859 /// declaration: [C99 6.7]
860 /// declaration-specifiers init-declarator-list[opt] ';'
861 /// [!C99] init-declarator-list ';' [TODO: warn in c99 mode]
862 /// [OMP] threadprivate-directive [TODO]
864 Parser::DeclGroupPtrTy
865 Parser::ParseDeclOrFunctionDefInternal(ParsedAttributesWithRange &attrs,
867 AccessSpecifier AS) {
868 // Parse the common declaration-specifiers piece.
869 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS, DSC_top_level);
871 // If we had a free-standing type definition with a missing semicolon, we
872 // may get this far before the problem becomes obvious.
873 if (DS.hasTagDefinition() &&
874 DiagnoseMissingSemiAfterTagDefinition(DS, AS, DSC_top_level))
875 return DeclGroupPtrTy();
877 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
878 // declaration-specifiers init-declarator-list[opt] ';'
879 if (Tok.is(tok::semi)) {
880 ProhibitAttributes(attrs);
882 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS);
883 DS.complete(TheDecl);
884 return Actions.ConvertDeclToDeclGroup(TheDecl);
887 DS.takeAttributesFrom(attrs);
889 // ObjC2 allows prefix attributes on class interfaces and protocols.
890 // FIXME: This still needs better diagnostics. We should only accept
891 // attributes here, no types, etc.
892 if (getLangOpts().ObjC2 && Tok.is(tok::at)) {
893 SourceLocation AtLoc = ConsumeToken(); // the "@"
894 if (!Tok.isObjCAtKeyword(tok::objc_interface) &&
895 !Tok.isObjCAtKeyword(tok::objc_protocol)) {
896 Diag(Tok, diag::err_objc_unexpected_attr);
897 SkipUntil(tok::semi); // FIXME: better skip?
898 return DeclGroupPtrTy();
903 const char *PrevSpec = nullptr;
905 if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec, DiagID,
906 Actions.getASTContext().getPrintingPolicy()))
907 Diag(AtLoc, DiagID) << PrevSpec;
909 if (Tok.isObjCAtKeyword(tok::objc_protocol))
910 return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes());
912 return Actions.ConvertDeclToDeclGroup(
913 ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()));
916 // If the declspec consisted only of 'extern' and we have a string
917 // literal following it, this must be a C++ linkage specifier like
919 if (getLangOpts().CPlusPlus && isTokenStringLiteral() &&
920 DS.getStorageClassSpec() == DeclSpec::SCS_extern &&
921 DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) {
922 Decl *TheDecl = ParseLinkage(DS, Declarator::FileContext);
923 return Actions.ConvertDeclToDeclGroup(TheDecl);
926 return ParseDeclGroup(DS, Declarator::FileContext);
929 Parser::DeclGroupPtrTy
930 Parser::ParseDeclarationOrFunctionDefinition(ParsedAttributesWithRange &attrs,
932 AccessSpecifier AS) {
934 return ParseDeclOrFunctionDefInternal(attrs, *DS, AS);
936 ParsingDeclSpec PDS(*this);
937 // Must temporarily exit the objective-c container scope for
938 // parsing c constructs and re-enter objc container scope
940 ObjCDeclContextSwitch ObjCDC(*this);
942 return ParseDeclOrFunctionDefInternal(attrs, PDS, AS);
946 /// ParseFunctionDefinition - We parsed and verified that the specified
947 /// Declarator is well formed. If this is a K&R-style function, read the
948 /// parameters declaration-list, then start the compound-statement.
950 /// function-definition: [C99 6.9.1]
951 /// decl-specs declarator declaration-list[opt] compound-statement
952 /// [C90] function-definition: [C99 6.7.1] - implicit int result
953 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
954 /// [C++] function-definition: [C++ 8.4]
955 /// decl-specifier-seq[opt] declarator ctor-initializer[opt]
957 /// [C++] function-definition: [C++ 8.4]
958 /// decl-specifier-seq[opt] declarator function-try-block
960 Decl *Parser::ParseFunctionDefinition(ParsingDeclarator &D,
961 const ParsedTemplateInfo &TemplateInfo,
962 LateParsedAttrList *LateParsedAttrs) {
963 // Poison SEH identifiers so they are flagged as illegal in function bodies.
964 PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true);
965 const DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo();
967 // If this is C90 and the declspecs were completely missing, fudge in an
968 // implicit int. We do this here because this is the only place where
969 // declaration-specifiers are completely optional in the grammar.
970 if (getLangOpts().ImplicitInt && D.getDeclSpec().isEmpty()) {
971 const char *PrevSpec;
973 const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
974 D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int,
975 D.getIdentifierLoc(),
978 D.SetRangeBegin(D.getDeclSpec().getSourceRange().getBegin());
981 // If this declaration was formed with a K&R-style identifier list for the
982 // arguments, parse declarations for all of the args next.
983 // int foo(a,b) int a; float b; {}
984 if (FTI.isKNRPrototype())
985 ParseKNRParamDeclarations(D);
987 // We should have either an opening brace or, in a C++ constructor,
988 // we may have a colon.
989 if (Tok.isNot(tok::l_brace) &&
990 (!getLangOpts().CPlusPlus ||
991 (Tok.isNot(tok::colon) && Tok.isNot(tok::kw_try) &&
992 Tok.isNot(tok::equal)))) {
993 Diag(Tok, diag::err_expected_fn_body);
995 // Skip over garbage, until we get to '{'. Don't eat the '{'.
996 SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
998 // If we didn't find the '{', bail out.
999 if (Tok.isNot(tok::l_brace))
1003 // Check to make sure that any normal attributes are allowed to be on
1004 // a definition. Late parsed attributes are checked at the end.
1005 if (Tok.isNot(tok::equal)) {
1006 AttributeList *DtorAttrs = D.getAttributes();
1008 if (DtorAttrs->isKnownToGCC() &&
1009 !DtorAttrs->isCXX11Attribute()) {
1010 Diag(DtorAttrs->getLoc(), diag::warn_attribute_on_function_definition)
1011 << DtorAttrs->getName();
1013 DtorAttrs = DtorAttrs->getNext();
1017 // In delayed template parsing mode, for function template we consume the
1018 // tokens and store them for late parsing at the end of the translation unit.
1019 if (getLangOpts().DelayedTemplateParsing && Tok.isNot(tok::equal) &&
1020 TemplateInfo.Kind == ParsedTemplateInfo::Template &&
1021 Actions.canDelayFunctionBody(D)) {
1022 MultiTemplateParamsArg TemplateParameterLists(*TemplateInfo.TemplateParams);
1024 ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
1025 Scope *ParentScope = getCurScope()->getParent();
1027 D.setFunctionDefinitionKind(FDK_Definition);
1028 Decl *DP = Actions.HandleDeclarator(ParentScope, D,
1029 TemplateParameterLists);
1031 D.getMutableDeclSpec().abort();
1034 LexTemplateFunctionForLateParsing(Toks);
1037 FunctionDecl *FnD = DP->getAsFunction();
1038 Actions.CheckForFunctionRedefinition(FnD);
1039 Actions.MarkAsLateParsedTemplate(FnD, DP, Toks);
1043 else if (CurParsedObjCImpl &&
1044 !TemplateInfo.TemplateParams &&
1045 (Tok.is(tok::l_brace) || Tok.is(tok::kw_try) ||
1046 Tok.is(tok::colon)) &&
1047 Actions.CurContext->isTranslationUnit()) {
1048 ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
1049 Scope *ParentScope = getCurScope()->getParent();
1051 D.setFunctionDefinitionKind(FDK_Definition);
1052 Decl *FuncDecl = Actions.HandleDeclarator(ParentScope, D,
1053 MultiTemplateParamsArg());
1054 D.complete(FuncDecl);
1055 D.getMutableDeclSpec().abort();
1057 // Consume the tokens and store them for later parsing.
1058 StashAwayMethodOrFunctionBodyTokens(FuncDecl);
1059 CurParsedObjCImpl->HasCFunction = true;
1062 // FIXME: Should we really fall through here?
1065 // Enter a scope for the function body.
1066 ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
1068 // Tell the actions module that we have entered a function definition with the
1069 // specified Declarator for the function.
1070 Decl *Res = TemplateInfo.TemplateParams?
1071 Actions.ActOnStartOfFunctionTemplateDef(getCurScope(),
1072 *TemplateInfo.TemplateParams, D)
1073 : Actions.ActOnStartOfFunctionDef(getCurScope(), D);
1075 // Break out of the ParsingDeclarator context before we parse the body.
1078 // Break out of the ParsingDeclSpec context, too. This const_cast is
1079 // safe because we're always the sole owner.
1080 D.getMutableDeclSpec().abort();
1082 if (TryConsumeToken(tok::equal)) {
1083 assert(getLangOpts().CPlusPlus && "Only C++ function definitions have '='");
1085 bool Delete = false;
1086 SourceLocation KWLoc;
1087 if (TryConsumeToken(tok::kw_delete, KWLoc)) {
1088 Diag(KWLoc, getLangOpts().CPlusPlus11
1089 ? diag::warn_cxx98_compat_deleted_function
1090 : diag::ext_deleted_function);
1091 Actions.SetDeclDeleted(Res, KWLoc);
1093 } else if (TryConsumeToken(tok::kw_default, KWLoc)) {
1094 Diag(KWLoc, getLangOpts().CPlusPlus11
1095 ? diag::warn_cxx98_compat_defaulted_function
1096 : diag::ext_defaulted_function);
1097 Actions.SetDeclDefaulted(Res, KWLoc);
1099 llvm_unreachable("function definition after = not 'delete' or 'default'");
1102 if (Tok.is(tok::comma)) {
1103 Diag(KWLoc, diag::err_default_delete_in_multiple_declaration)
1105 SkipUntil(tok::semi);
1106 } else if (ExpectAndConsume(tok::semi, diag::err_expected_after,
1107 Delete ? "delete" : "default")) {
1108 SkipUntil(tok::semi);
1111 Stmt *GeneratedBody = Res ? Res->getBody() : nullptr;
1112 Actions.ActOnFinishFunctionBody(Res, GeneratedBody, false);
1116 if (Tok.is(tok::kw_try))
1117 return ParseFunctionTryBlock(Res, BodyScope);
1119 // If we have a colon, then we're probably parsing a C++
1120 // ctor-initializer.
1121 if (Tok.is(tok::colon)) {
1122 ParseConstructorInitializer(Res);
1124 // Recover from error.
1125 if (!Tok.is(tok::l_brace)) {
1127 Actions.ActOnFinishFunctionBody(Res, nullptr);
1131 Actions.ActOnDefaultCtorInitializers(Res);
1133 // Late attributes are parsed in the same scope as the function body.
1134 if (LateParsedAttrs)
1135 ParseLexedAttributeList(*LateParsedAttrs, Res, false, true);
1137 return ParseFunctionStatementBody(Res, BodyScope);
1140 /// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides
1141 /// types for a function with a K&R-style identifier list for arguments.
1142 void Parser::ParseKNRParamDeclarations(Declarator &D) {
1143 // We know that the top-level of this declarator is a function.
1144 DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo();
1146 // Enter function-declaration scope, limiting any declarators to the
1147 // function prototype scope, including parameter declarators.
1148 ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
1149 Scope::FunctionDeclarationScope | Scope::DeclScope);
1151 // Read all the argument declarations.
1152 while (isDeclarationSpecifier()) {
1153 SourceLocation DSStart = Tok.getLocation();
1155 // Parse the common declaration-specifiers piece.
1156 DeclSpec DS(AttrFactory);
1157 ParseDeclarationSpecifiers(DS);
1159 // C99 6.9.1p6: 'each declaration in the declaration list shall have at
1160 // least one declarator'.
1161 // NOTE: GCC just makes this an ext-warn. It's not clear what it does with
1162 // the declarations though. It's trivial to ignore them, really hard to do
1163 // anything else with them.
1164 if (TryConsumeToken(tok::semi)) {
1165 Diag(DSStart, diag::err_declaration_does_not_declare_param);
1169 // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other
1171 if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified &&
1172 DS.getStorageClassSpec() != DeclSpec::SCS_register) {
1173 Diag(DS.getStorageClassSpecLoc(),
1174 diag::err_invalid_storage_class_in_func_decl);
1175 DS.ClearStorageClassSpecs();
1177 if (DS.getThreadStorageClassSpec() != DeclSpec::TSCS_unspecified) {
1178 Diag(DS.getThreadStorageClassSpecLoc(),
1179 diag::err_invalid_storage_class_in_func_decl);
1180 DS.ClearStorageClassSpecs();
1183 // Parse the first declarator attached to this declspec.
1184 Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext);
1185 ParseDeclarator(ParmDeclarator);
1187 // Handle the full declarator list.
1189 // If attributes are present, parse them.
1190 MaybeParseGNUAttributes(ParmDeclarator);
1192 // Ask the actions module to compute the type for this declarator.
1194 Actions.ActOnParamDeclarator(getCurScope(), ParmDeclarator);
1197 // A missing identifier has already been diagnosed.
1198 ParmDeclarator.getIdentifier()) {
1200 // Scan the argument list looking for the correct param to apply this
1202 for (unsigned i = 0; ; ++i) {
1203 // C99 6.9.1p6: those declarators shall declare only identifiers from
1204 // the identifier list.
1205 if (i == FTI.NumParams) {
1206 Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param)
1207 << ParmDeclarator.getIdentifier();
1211 if (FTI.Params[i].Ident == ParmDeclarator.getIdentifier()) {
1212 // Reject redefinitions of parameters.
1213 if (FTI.Params[i].Param) {
1214 Diag(ParmDeclarator.getIdentifierLoc(),
1215 diag::err_param_redefinition)
1216 << ParmDeclarator.getIdentifier();
1218 FTI.Params[i].Param = Param;
1225 // If we don't have a comma, it is either the end of the list (a ';') or
1226 // an error, bail out.
1227 if (Tok.isNot(tok::comma))
1230 ParmDeclarator.clear();
1232 // Consume the comma.
1233 ParmDeclarator.setCommaLoc(ConsumeToken());
1235 // Parse the next declarator.
1236 ParseDeclarator(ParmDeclarator);
1239 // Consume ';' and continue parsing.
1240 if (!ExpectAndConsumeSemi(diag::err_expected_semi_declaration))
1243 // Otherwise recover by skipping to next semi or mandatory function body.
1244 if (SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch))
1246 TryConsumeToken(tok::semi);
1249 // The actions module must verify that all arguments were declared.
1250 Actions.ActOnFinishKNRParamDeclarations(getCurScope(), D, Tok.getLocation());
1254 /// ParseAsmStringLiteral - This is just a normal string-literal, but is not
1255 /// allowed to be a wide string, and is not subject to character translation.
1257 /// [GNU] asm-string-literal:
1260 ExprResult Parser::ParseAsmStringLiteral() {
1261 if (!isTokenStringLiteral()) {
1262 Diag(Tok, diag::err_expected_string_literal)
1263 << /*Source='in...'*/0 << "'asm'";
1267 ExprResult AsmString(ParseStringLiteralExpression());
1268 if (!AsmString.isInvalid()) {
1269 const auto *SL = cast<StringLiteral>(AsmString.get());
1270 if (!SL->isAscii()) {
1271 Diag(Tok, diag::err_asm_operand_wide_string_literal)
1273 << SL->getSourceRange();
1282 /// [GNU] simple-asm-expr:
1283 /// 'asm' '(' asm-string-literal ')'
1285 ExprResult Parser::ParseSimpleAsm(SourceLocation *EndLoc) {
1286 assert(Tok.is(tok::kw_asm) && "Not an asm!");
1287 SourceLocation Loc = ConsumeToken();
1289 if (Tok.is(tok::kw_volatile)) {
1290 // Remove from the end of 'asm' to the end of 'volatile'.
1291 SourceRange RemovalRange(PP.getLocForEndOfToken(Loc),
1292 PP.getLocForEndOfToken(Tok.getLocation()));
1294 Diag(Tok, diag::warn_file_asm_volatile)
1295 << FixItHint::CreateRemoval(RemovalRange);
1299 BalancedDelimiterTracker T(*this, tok::l_paren);
1300 if (T.consumeOpen()) {
1301 Diag(Tok, diag::err_expected_lparen_after) << "asm";
1305 ExprResult Result(ParseAsmStringLiteral());
1307 if (!Result.isInvalid()) {
1308 // Close the paren and get the location of the end bracket
1311 *EndLoc = T.getCloseLocation();
1312 } else if (SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch)) {
1314 *EndLoc = Tok.getLocation();
1321 /// \brief Get the TemplateIdAnnotation from the token and put it in the
1322 /// cleanup pool so that it gets destroyed when parsing the current top level
1323 /// declaration is finished.
1324 TemplateIdAnnotation *Parser::takeTemplateIdAnnotation(const Token &tok) {
1325 assert(tok.is(tok::annot_template_id) && "Expected template-id token");
1326 TemplateIdAnnotation *
1327 Id = static_cast<TemplateIdAnnotation *>(tok.getAnnotationValue());
1331 void Parser::AnnotateScopeToken(CXXScopeSpec &SS, bool IsNewAnnotation) {
1332 // Push the current token back into the token stream (or revert it if it is
1333 // cached) and use an annotation scope token for current token.
1334 if (PP.isBacktrackEnabled())
1335 PP.RevertCachedTokens(1);
1338 Tok.setKind(tok::annot_cxxscope);
1339 Tok.setAnnotationValue(Actions.SaveNestedNameSpecifierAnnotation(SS));
1340 Tok.setAnnotationRange(SS.getRange());
1342 // In case the tokens were cached, have Preprocessor replace them
1343 // with the annotation token. We don't need to do this if we've
1344 // just reverted back to a prior state.
1345 if (IsNewAnnotation)
1346 PP.AnnotateCachedTokens(Tok);
1349 /// \brief Attempt to classify the name at the current token position. This may
1350 /// form a type, scope or primary expression annotation, or replace the token
1351 /// with a typo-corrected keyword. This is only appropriate when the current
1352 /// name must refer to an entity which has already been declared.
1354 /// \param IsAddressOfOperand Must be \c true if the name is preceded by an '&'
1355 /// and might possibly have a dependent nested name specifier.
1356 /// \param CCC Indicates how to perform typo-correction for this name. If NULL,
1357 /// no typo correction will be performed.
1358 Parser::AnnotatedNameKind
1359 Parser::TryAnnotateName(bool IsAddressOfOperand,
1360 std::unique_ptr<CorrectionCandidateCallback> CCC) {
1361 assert(Tok.is(tok::identifier) || Tok.is(tok::annot_cxxscope));
1363 const bool EnteringContext = false;
1364 const bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
1367 if (getLangOpts().CPlusPlus &&
1368 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
1371 if (Tok.isNot(tok::identifier) || SS.isInvalid()) {
1372 if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, false, SS,
1373 !WasScopeAnnotation))
1375 return ANK_Unresolved;
1378 IdentifierInfo *Name = Tok.getIdentifierInfo();
1379 SourceLocation NameLoc = Tok.getLocation();
1381 // FIXME: Move the tentative declaration logic into ClassifyName so we can
1382 // typo-correct to tentatively-declared identifiers.
1383 if (isTentativelyDeclared(Name)) {
1384 // Identifier has been tentatively declared, and thus cannot be resolved as
1385 // an expression. Fall back to annotating it as a type.
1386 if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, false, SS,
1387 !WasScopeAnnotation))
1389 return Tok.is(tok::annot_typename) ? ANK_Success : ANK_TentativeDecl;
1392 Token Next = NextToken();
1394 // Look up and classify the identifier. We don't perform any typo-correction
1395 // after a scope specifier, because in general we can't recover from typos
1396 // there (eg, after correcting 'A::tempalte B<X>::C' [sic], we would need to
1397 // jump back into scope specifier parsing).
1398 Sema::NameClassification Classification = Actions.ClassifyName(
1399 getCurScope(), SS, Name, NameLoc, Next, IsAddressOfOperand,
1400 SS.isEmpty() ? std::move(CCC) : nullptr);
1402 switch (Classification.getKind()) {
1403 case Sema::NC_Error:
1406 case Sema::NC_Keyword:
1407 // The identifier was typo-corrected to a keyword.
1408 Tok.setIdentifierInfo(Name);
1409 Tok.setKind(Name->getTokenID());
1410 PP.TypoCorrectToken(Tok);
1411 if (SS.isNotEmpty())
1412 AnnotateScopeToken(SS, !WasScopeAnnotation);
1413 // We've "annotated" this as a keyword.
1416 case Sema::NC_Unknown:
1417 // It's not something we know about. Leave it unannotated.
1420 case Sema::NC_Type: {
1421 SourceLocation BeginLoc = NameLoc;
1422 if (SS.isNotEmpty())
1423 BeginLoc = SS.getBeginLoc();
1425 /// An Objective-C object type followed by '<' is a specialization of
1426 /// a parameterized class type or a protocol-qualified type.
1427 ParsedType Ty = Classification.getType();
1428 if (getLangOpts().ObjC1 && NextToken().is(tok::less) &&
1429 (Ty.get()->isObjCObjectType() ||
1430 Ty.get()->isObjCObjectPointerType())) {
1431 // Consume the name.
1432 SourceLocation IdentifierLoc = ConsumeToken();
1433 SourceLocation NewEndLoc;
1435 = parseObjCTypeArgsAndProtocolQualifiers(IdentifierLoc, Ty,
1436 /*consumeLastToken=*/false,
1438 if (NewType.isUsable())
1442 Tok.setKind(tok::annot_typename);
1443 setTypeAnnotation(Tok, Ty);
1444 Tok.setAnnotationEndLoc(Tok.getLocation());
1445 Tok.setLocation(BeginLoc);
1446 PP.AnnotateCachedTokens(Tok);
1450 case Sema::NC_Expression:
1451 Tok.setKind(tok::annot_primary_expr);
1452 setExprAnnotation(Tok, Classification.getExpression());
1453 Tok.setAnnotationEndLoc(NameLoc);
1454 if (SS.isNotEmpty())
1455 Tok.setLocation(SS.getBeginLoc());
1456 PP.AnnotateCachedTokens(Tok);
1459 case Sema::NC_TypeTemplate:
1460 if (Next.isNot(tok::less)) {
1461 // This may be a type template being used as a template template argument.
1462 if (SS.isNotEmpty())
1463 AnnotateScopeToken(SS, !WasScopeAnnotation);
1464 return ANK_TemplateName;
1467 case Sema::NC_VarTemplate:
1468 case Sema::NC_FunctionTemplate: {
1469 // We have a type, variable or function template followed by '<'.
1472 Id.setIdentifier(Name, NameLoc);
1473 if (AnnotateTemplateIdToken(
1474 TemplateTy::make(Classification.getTemplateName()),
1475 Classification.getTemplateNameKind(), SS, SourceLocation(), Id))
1480 case Sema::NC_NestedNameSpecifier:
1481 llvm_unreachable("already parsed nested name specifier");
1484 // Unable to classify the name, but maybe we can annotate a scope specifier.
1485 if (SS.isNotEmpty())
1486 AnnotateScopeToken(SS, !WasScopeAnnotation);
1487 return ANK_Unresolved;
1490 bool Parser::TryKeywordIdentFallback(bool DisableKeyword) {
1491 assert(Tok.isNot(tok::identifier));
1492 Diag(Tok, diag::ext_keyword_as_ident)
1493 << PP.getSpelling(Tok)
1496 Tok.getIdentifierInfo()->RevertTokenIDToIdentifier();
1497 Tok.setKind(tok::identifier);
1501 /// TryAnnotateTypeOrScopeToken - If the current token position is on a
1502 /// typename (possibly qualified in C++) or a C++ scope specifier not followed
1503 /// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens
1504 /// with a single annotation token representing the typename or C++ scope
1506 /// This simplifies handling of C++ scope specifiers and allows efficient
1507 /// backtracking without the need to re-parse and resolve nested-names and
1509 /// It will mainly be called when we expect to treat identifiers as typenames
1510 /// (if they are typenames). For example, in C we do not expect identifiers
1511 /// inside expressions to be treated as typenames so it will not be called
1512 /// for expressions in C.
1513 /// The benefit for C/ObjC is that a typename will be annotated and
1514 /// Actions.getTypeName will not be needed to be called again (e.g. getTypeName
1515 /// will not be called twice, once to check whether we have a declaration
1516 /// specifier, and another one to get the actual type inside
1517 /// ParseDeclarationSpecifiers).
1519 /// This returns true if an error occurred.
1521 /// Note that this routine emits an error if you call it with ::new or ::delete
1522 /// as the current tokens, so only call it in contexts where these are invalid.
1523 bool Parser::TryAnnotateTypeOrScopeToken(bool EnteringContext, bool NeedType) {
1524 assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
1525 Tok.is(tok::kw_typename) || Tok.is(tok::annot_cxxscope) ||
1526 Tok.is(tok::kw_decltype) || Tok.is(tok::annot_template_id) ||
1527 Tok.is(tok::kw___super)) &&
1528 "Cannot be a type or scope token!");
1530 if (Tok.is(tok::kw_typename)) {
1531 // MSVC lets you do stuff like:
1532 // typename typedef T_::D D;
1534 // We will consume the typedef token here and put it back after we have
1535 // parsed the first identifier, transforming it into something more like:
1536 // typename T_::D typedef D;
1537 if (getLangOpts().MSVCCompat && NextToken().is(tok::kw_typedef)) {
1539 PP.Lex(TypedefToken);
1540 bool Result = TryAnnotateTypeOrScopeToken(EnteringContext, NeedType);
1544 Diag(Tok.getLocation(), diag::warn_expected_qualified_after_typename);
1548 // Parse a C++ typename-specifier, e.g., "typename T::type".
1550 // typename-specifier:
1551 // 'typename' '::' [opt] nested-name-specifier identifier
1552 // 'typename' '::' [opt] nested-name-specifier template [opt]
1553 // simple-template-id
1554 SourceLocation TypenameLoc = ConsumeToken();
1556 if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/ParsedType(),
1557 /*EnteringContext=*/false,
1558 nullptr, /*IsTypename*/ true))
1561 if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id) ||
1562 Tok.is(tok::annot_decltype)) {
1563 // Attempt to recover by skipping the invalid 'typename'
1564 if (Tok.is(tok::annot_decltype) ||
1565 (!TryAnnotateTypeOrScopeToken(EnteringContext, NeedType) &&
1566 Tok.isAnnotation())) {
1567 unsigned DiagID = diag::err_expected_qualified_after_typename;
1568 // MS compatibility: MSVC permits using known types with typename.
1569 // e.g. "typedef typename T* pointer_type"
1570 if (getLangOpts().MicrosoftExt)
1571 DiagID = diag::warn_expected_qualified_after_typename;
1572 Diag(Tok.getLocation(), DiagID);
1577 Diag(Tok.getLocation(), diag::err_expected_qualified_after_typename);
1582 if (Tok.is(tok::identifier)) {
1583 // FIXME: check whether the next token is '<', first!
1584 Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
1585 *Tok.getIdentifierInfo(),
1587 } else if (Tok.is(tok::annot_template_id)) {
1588 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1589 if (TemplateId->Kind != TNK_Type_template &&
1590 TemplateId->Kind != TNK_Dependent_template_name) {
1591 Diag(Tok, diag::err_typename_refers_to_non_type_template)
1592 << Tok.getAnnotationRange();
1596 ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
1597 TemplateId->NumArgs);
1599 Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
1600 TemplateId->TemplateKWLoc,
1601 TemplateId->Template,
1602 TemplateId->TemplateNameLoc,
1603 TemplateId->LAngleLoc,
1605 TemplateId->RAngleLoc);
1607 Diag(Tok, diag::err_expected_type_name_after_typename)
1612 SourceLocation EndLoc = Tok.getLastLoc();
1613 Tok.setKind(tok::annot_typename);
1614 setTypeAnnotation(Tok, Ty.isInvalid() ? ParsedType() : Ty.get());
1615 Tok.setAnnotationEndLoc(EndLoc);
1616 Tok.setLocation(TypenameLoc);
1617 PP.AnnotateCachedTokens(Tok);
1621 // Remembers whether the token was originally a scope annotation.
1622 bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
1625 if (getLangOpts().CPlusPlus)
1626 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
1629 return TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, NeedType,
1630 SS, !WasScopeAnnotation);
1633 /// \brief Try to annotate a type or scope token, having already parsed an
1634 /// optional scope specifier. \p IsNewScope should be \c true unless the scope
1635 /// specifier was extracted from an existing tok::annot_cxxscope annotation.
1636 bool Parser::TryAnnotateTypeOrScopeTokenAfterScopeSpec(bool EnteringContext,
1640 if (Tok.is(tok::identifier)) {
1641 IdentifierInfo *CorrectedII = nullptr;
1642 // Determine whether the identifier is a type name.
1643 if (ParsedType Ty = Actions.getTypeName(*Tok.getIdentifierInfo(),
1644 Tok.getLocation(), getCurScope(),
1646 NextToken().is(tok::period),
1648 /*IsCtorOrDtorName=*/false,
1649 /*NonTrivialTypeSourceInfo*/ true,
1650 NeedType ? &CorrectedII
1652 // A FixIt was applied as a result of typo correction
1654 Tok.setIdentifierInfo(CorrectedII);
1656 SourceLocation BeginLoc = Tok.getLocation();
1657 if (SS.isNotEmpty()) // it was a C++ qualified type name.
1658 BeginLoc = SS.getBeginLoc();
1660 /// An Objective-C object type followed by '<' is a specialization of
1661 /// a parameterized class type or a protocol-qualified type.
1662 if (getLangOpts().ObjC1 && NextToken().is(tok::less) &&
1663 (Ty.get()->isObjCObjectType() ||
1664 Ty.get()->isObjCObjectPointerType())) {
1665 // Consume the name.
1666 SourceLocation IdentifierLoc = ConsumeToken();
1667 SourceLocation NewEndLoc;
1669 = parseObjCTypeArgsAndProtocolQualifiers(IdentifierLoc, Ty,
1670 /*consumeLastToken=*/false,
1672 if (NewType.isUsable())
1676 // This is a typename. Replace the current token in-place with an
1677 // annotation type token.
1678 Tok.setKind(tok::annot_typename);
1679 setTypeAnnotation(Tok, Ty);
1680 Tok.setAnnotationEndLoc(Tok.getLocation());
1681 Tok.setLocation(BeginLoc);
1683 // In case the tokens were cached, have Preprocessor replace
1684 // them with the annotation token.
1685 PP.AnnotateCachedTokens(Tok);
1689 if (!getLangOpts().CPlusPlus) {
1690 // If we're in C, we can't have :: tokens at all (the lexer won't return
1691 // them). If the identifier is not a type, then it can't be scope either,
1696 // If this is a template-id, annotate with a template-id or type token.
1697 if (NextToken().is(tok::less)) {
1698 TemplateTy Template;
1699 UnqualifiedId TemplateName;
1700 TemplateName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
1701 bool MemberOfUnknownSpecialization;
1702 if (TemplateNameKind TNK
1703 = Actions.isTemplateName(getCurScope(), SS,
1704 /*hasTemplateKeyword=*/false, TemplateName,
1705 /*ObjectType=*/ ParsedType(),
1707 Template, MemberOfUnknownSpecialization)) {
1708 // Consume the identifier.
1710 if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(),
1712 // If an unrecoverable error occurred, we need to return true here,
1713 // because the token stream is in a damaged state. We may not return
1714 // a valid identifier.
1720 // The current token, which is either an identifier or a
1721 // template-id, is not part of the annotation. Fall through to
1722 // push that token back into the stream and complete the C++ scope
1723 // specifier annotation.
1726 if (Tok.is(tok::annot_template_id)) {
1727 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1728 if (TemplateId->Kind == TNK_Type_template) {
1729 // A template-id that refers to a type was parsed into a
1730 // template-id annotation in a context where we weren't allowed
1731 // to produce a type annotation token. Update the template-id
1732 // annotation token to a type annotation token now.
1733 AnnotateTemplateIdTokenAsType();
1741 // A C++ scope specifier that isn't followed by a typename.
1742 AnnotateScopeToken(SS, IsNewScope);
1746 /// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only
1747 /// annotates C++ scope specifiers and template-ids. This returns
1748 /// true if there was an error that could not be recovered from.
1750 /// Note that this routine emits an error if you call it with ::new or ::delete
1751 /// as the current tokens, so only call it in contexts where these are invalid.
1752 bool Parser::TryAnnotateCXXScopeToken(bool EnteringContext) {
1753 assert(getLangOpts().CPlusPlus &&
1754 "Call sites of this function should be guarded by checking for C++");
1755 assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
1756 (Tok.is(tok::annot_template_id) && NextToken().is(tok::coloncolon)) ||
1757 Tok.is(tok::kw_decltype) || Tok.is(tok::kw___super)) &&
1758 "Cannot be a type or scope token!");
1761 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
1766 AnnotateScopeToken(SS, true);
1770 bool Parser::isTokenEqualOrEqualTypo() {
1771 tok::TokenKind Kind = Tok.getKind();
1775 case tok::ampequal: // &=
1776 case tok::starequal: // *=
1777 case tok::plusequal: // +=
1778 case tok::minusequal: // -=
1779 case tok::exclaimequal: // !=
1780 case tok::slashequal: // /=
1781 case tok::percentequal: // %=
1782 case tok::lessequal: // <=
1783 case tok::lesslessequal: // <<=
1784 case tok::greaterequal: // >=
1785 case tok::greatergreaterequal: // >>=
1786 case tok::caretequal: // ^=
1787 case tok::pipeequal: // |=
1788 case tok::equalequal: // ==
1789 Diag(Tok, diag::err_invalid_token_after_declarator_suggest_equal)
1791 << FixItHint::CreateReplacement(SourceRange(Tok.getLocation()), "=");
1797 SourceLocation Parser::handleUnexpectedCodeCompletionToken() {
1798 assert(Tok.is(tok::code_completion));
1799 PrevTokLocation = Tok.getLocation();
1801 for (Scope *S = getCurScope(); S; S = S->getParent()) {
1802 if (S->getFlags() & Scope::FnScope) {
1803 Actions.CodeCompleteOrdinaryName(getCurScope(),
1804 Sema::PCC_RecoveryInFunction);
1806 return PrevTokLocation;
1809 if (S->getFlags() & Scope::ClassScope) {
1810 Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Class);
1812 return PrevTokLocation;
1816 Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Namespace);
1818 return PrevTokLocation;
1821 // Code-completion pass-through functions
1823 void Parser::CodeCompleteDirective(bool InConditional) {
1824 Actions.CodeCompletePreprocessorDirective(InConditional);
1827 void Parser::CodeCompleteInConditionalExclusion() {
1828 Actions.CodeCompleteInPreprocessorConditionalExclusion(getCurScope());
1831 void Parser::CodeCompleteMacroName(bool IsDefinition) {
1832 Actions.CodeCompletePreprocessorMacroName(IsDefinition);
1835 void Parser::CodeCompletePreprocessorExpression() {
1836 Actions.CodeCompletePreprocessorExpression();
1839 void Parser::CodeCompleteMacroArgument(IdentifierInfo *Macro,
1840 MacroInfo *MacroInfo,
1841 unsigned ArgumentIndex) {
1842 Actions.CodeCompletePreprocessorMacroArgument(getCurScope(), Macro, MacroInfo,
1846 void Parser::CodeCompleteNaturalLanguage() {
1847 Actions.CodeCompleteNaturalLanguage();
1850 bool Parser::ParseMicrosoftIfExistsCondition(IfExistsCondition& Result) {
1851 assert((Tok.is(tok::kw___if_exists) || Tok.is(tok::kw___if_not_exists)) &&
1852 "Expected '__if_exists' or '__if_not_exists'");
1853 Result.IsIfExists = Tok.is(tok::kw___if_exists);
1854 Result.KeywordLoc = ConsumeToken();
1856 BalancedDelimiterTracker T(*this, tok::l_paren);
1857 if (T.consumeOpen()) {
1858 Diag(Tok, diag::err_expected_lparen_after)
1859 << (Result.IsIfExists? "__if_exists" : "__if_not_exists");
1863 // Parse nested-name-specifier.
1864 if (getLangOpts().CPlusPlus)
1865 ParseOptionalCXXScopeSpecifier(Result.SS, ParsedType(),
1866 /*EnteringContext=*/false);
1868 // Check nested-name specifier.
1869 if (Result.SS.isInvalid()) {
1874 // Parse the unqualified-id.
1875 SourceLocation TemplateKWLoc; // FIXME: parsed, but unused.
1876 if (ParseUnqualifiedId(Result.SS, false, true, true, ParsedType(),
1877 TemplateKWLoc, Result.Name)) {
1882 if (T.consumeClose())
1885 // Check if the symbol exists.
1886 switch (Actions.CheckMicrosoftIfExistsSymbol(getCurScope(), Result.KeywordLoc,
1887 Result.IsIfExists, Result.SS,
1889 case Sema::IER_Exists:
1890 Result.Behavior = Result.IsIfExists ? IEB_Parse : IEB_Skip;
1893 case Sema::IER_DoesNotExist:
1894 Result.Behavior = !Result.IsIfExists ? IEB_Parse : IEB_Skip;
1897 case Sema::IER_Dependent:
1898 Result.Behavior = IEB_Dependent;
1901 case Sema::IER_Error:
1908 void Parser::ParseMicrosoftIfExistsExternalDeclaration() {
1909 IfExistsCondition Result;
1910 if (ParseMicrosoftIfExistsCondition(Result))
1913 BalancedDelimiterTracker Braces(*this, tok::l_brace);
1914 if (Braces.consumeOpen()) {
1915 Diag(Tok, diag::err_expected) << tok::l_brace;
1919 switch (Result.Behavior) {
1921 // Parse declarations below.
1925 llvm_unreachable("Cannot have a dependent external declaration");
1932 // Parse the declarations.
1933 // FIXME: Support module import within __if_exists?
1934 while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
1935 ParsedAttributesWithRange attrs(AttrFactory);
1936 MaybeParseCXX11Attributes(attrs);
1937 MaybeParseMicrosoftAttributes(attrs);
1938 DeclGroupPtrTy Result = ParseExternalDeclaration(attrs);
1939 if (Result && !getCurScope()->getParent())
1940 Actions.getASTConsumer().HandleTopLevelDecl(Result.get());
1942 Braces.consumeClose();
1945 Parser::DeclGroupPtrTy Parser::ParseModuleImport(SourceLocation AtLoc) {
1946 assert(Tok.isObjCAtKeyword(tok::objc_import) &&
1947 "Improper start to module import");
1948 SourceLocation ImportLoc = ConsumeToken();
1950 SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 2> Path;
1952 // Parse the module path.
1954 if (!Tok.is(tok::identifier)) {
1955 if (Tok.is(tok::code_completion)) {
1956 Actions.CodeCompleteModuleImport(ImportLoc, Path);
1958 return DeclGroupPtrTy();
1961 Diag(Tok, diag::err_module_expected_ident);
1962 SkipUntil(tok::semi);
1963 return DeclGroupPtrTy();
1966 // Record this part of the module path.
1967 Path.push_back(std::make_pair(Tok.getIdentifierInfo(), Tok.getLocation()));
1970 if (Tok.is(tok::period)) {
1978 if (PP.hadModuleLoaderFatalFailure()) {
1979 // With a fatal failure in the module loader, we abort parsing.
1981 return DeclGroupPtrTy();
1984 DeclResult Import = Actions.ActOnModuleImport(AtLoc, ImportLoc, Path);
1985 ExpectAndConsumeSemi(diag::err_module_expected_semi);
1986 if (Import.isInvalid())
1987 return DeclGroupPtrTy();
1989 return Actions.ConvertDeclToDeclGroup(Import.get());
1992 bool BalancedDelimiterTracker::diagnoseOverflow() {
1993 P.Diag(P.Tok, diag::err_bracket_depth_exceeded)
1994 << P.getLangOpts().BracketDepth;
1995 P.Diag(P.Tok, diag::note_bracket_depth);
2000 bool BalancedDelimiterTracker::expectAndConsume(unsigned DiagID,
2002 tok::TokenKind SkipToTok) {
2003 LOpen = P.Tok.getLocation();
2004 if (P.ExpectAndConsume(Kind, DiagID, Msg)) {
2005 if (SkipToTok != tok::unknown)
2006 P.SkipUntil(SkipToTok, Parser::StopAtSemi);
2010 if (getDepth() < MaxDepth)
2013 return diagnoseOverflow();
2016 bool BalancedDelimiterTracker::diagnoseMissingClose() {
2017 assert(!P.Tok.is(Close) && "Should have consumed closing delimiter");
2019 P.Diag(P.Tok, diag::err_expected) << Close;
2020 P.Diag(LOpen, diag::note_matching) << Kind;
2022 // If we're not already at some kind of closing bracket, skip to our closing
2024 if (P.Tok.isNot(tok::r_paren) && P.Tok.isNot(tok::r_brace) &&
2025 P.Tok.isNot(tok::r_square) &&
2026 P.SkipUntil(Close, FinalToken,
2027 Parser::StopAtSemi | Parser::StopBeforeMatch) &&
2029 LClose = P.ConsumeAnyToken();
2033 void BalancedDelimiterTracker::skipToEnd() {
2034 P.SkipUntil(Close, Parser::StopBeforeMatch);