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:
286 case tok::annot_pragma_openmp_end:
287 // Stop before an OpenMP pragma boundary.
288 case tok::annot_module_begin:
289 case tok::annot_module_end:
290 case tok::annot_module_include:
291 // Stop before we change submodules. They generally indicate a "good"
292 // place to pick up parsing again (except in the special case where
293 // we're trying to skip to EOF).
296 case tok::code_completion:
297 if (!HasFlagsSet(Flags, StopAtCodeCompletion))
298 handleUnexpectedCodeCompletionToken();
302 // Recursively skip properly-nested parens.
304 if (HasFlagsSet(Flags, StopAtCodeCompletion))
305 SkipUntil(tok::r_paren, StopAtCodeCompletion);
307 SkipUntil(tok::r_paren);
310 // Recursively skip properly-nested square brackets.
312 if (HasFlagsSet(Flags, StopAtCodeCompletion))
313 SkipUntil(tok::r_square, StopAtCodeCompletion);
315 SkipUntil(tok::r_square);
318 // Recursively skip properly-nested braces.
320 if (HasFlagsSet(Flags, StopAtCodeCompletion))
321 SkipUntil(tok::r_brace, StopAtCodeCompletion);
323 SkipUntil(tok::r_brace);
326 // Okay, we found a ']' or '}' or ')', which we think should be balanced.
327 // Since the user wasn't looking for this token (if they were, it would
328 // already be handled), this isn't balanced. If there is a LHS token at a
329 // higher level, we will assume that this matches the unbalanced token
330 // and return it. Otherwise, this is a spurious RHS token, which we skip.
332 if (ParenCount && !isFirstTokenSkipped)
333 return false; // Matches something.
337 if (BracketCount && !isFirstTokenSkipped)
338 return false; // Matches something.
342 if (BraceCount && !isFirstTokenSkipped)
343 return false; // Matches something.
347 case tok::string_literal:
348 case tok::wide_string_literal:
349 case tok::utf8_string_literal:
350 case tok::utf16_string_literal:
351 case tok::utf32_string_literal:
352 ConsumeStringToken();
356 if (HasFlagsSet(Flags, StopAtSemi))
364 isFirstTokenSkipped = false;
368 //===----------------------------------------------------------------------===//
369 // Scope manipulation
370 //===----------------------------------------------------------------------===//
372 /// EnterScope - Start a new scope.
373 void Parser::EnterScope(unsigned ScopeFlags) {
374 if (NumCachedScopes) {
375 Scope *N = ScopeCache[--NumCachedScopes];
376 N->Init(getCurScope(), ScopeFlags);
377 Actions.CurScope = N;
379 Actions.CurScope = new Scope(getCurScope(), ScopeFlags, Diags);
383 /// ExitScope - Pop a scope off the scope stack.
384 void Parser::ExitScope() {
385 assert(getCurScope() && "Scope imbalance!");
387 // Inform the actions module that this scope is going away if there are any
389 Actions.ActOnPopScope(Tok.getLocation(), getCurScope());
391 Scope *OldScope = getCurScope();
392 Actions.CurScope = OldScope->getParent();
394 if (NumCachedScopes == ScopeCacheSize)
397 ScopeCache[NumCachedScopes++] = OldScope;
400 /// Set the flags for the current scope to ScopeFlags. If ManageFlags is false,
401 /// this object does nothing.
402 Parser::ParseScopeFlags::ParseScopeFlags(Parser *Self, unsigned ScopeFlags,
404 : CurScope(ManageFlags ? Self->getCurScope() : nullptr) {
406 OldFlags = CurScope->getFlags();
407 CurScope->setFlags(ScopeFlags);
411 /// Restore the flags for the current scope to what they were before this
412 /// object overrode them.
413 Parser::ParseScopeFlags::~ParseScopeFlags() {
415 CurScope->setFlags(OldFlags);
419 //===----------------------------------------------------------------------===//
420 // C99 6.9: External Definitions.
421 //===----------------------------------------------------------------------===//
424 // If we still have scopes active, delete the scope tree.
425 delete getCurScope();
426 Actions.CurScope = nullptr;
428 // Free the scope cache.
429 for (unsigned i = 0, e = NumCachedScopes; i != e; ++i)
430 delete ScopeCache[i];
432 resetPragmaHandlers();
434 PP.removeCommentHandler(CommentSemaHandler.get());
436 PP.clearCodeCompletionHandler();
438 if (getLangOpts().DelayedTemplateParsing &&
439 !PP.isIncrementalProcessingEnabled() && !TemplateIds.empty()) {
440 // If an ASTConsumer parsed delay-parsed templates in their
441 // HandleTranslationUnit() method, TemplateIds created there were not
442 // guarded by a DestroyTemplateIdAnnotationsRAIIObj object in
443 // ParseTopLevelDecl(). Destroy them here.
444 DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
447 assert(TemplateIds.empty() && "Still alive TemplateIdAnnotations around?");
450 /// Initialize - Warm up the parser.
452 void Parser::Initialize() {
453 // Create the translation unit scope. Install it as the current scope.
454 assert(getCurScope() == nullptr && "A scope is already active?");
455 EnterScope(Scope::DeclScope);
456 Actions.ActOnTranslationUnitScope(getCurScope());
458 // Initialization for Objective-C context sensitive keywords recognition.
459 // Referenced in Parser::ParseObjCTypeQualifierList.
460 if (getLangOpts().ObjC1) {
461 ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in");
462 ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out");
463 ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout");
464 ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway");
465 ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy");
466 ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref");
467 ObjCTypeQuals[objc_nonnull] = &PP.getIdentifierTable().get("nonnull");
468 ObjCTypeQuals[objc_nullable] = &PP.getIdentifierTable().get("nullable");
469 ObjCTypeQuals[objc_null_unspecified]
470 = &PP.getIdentifierTable().get("null_unspecified");
473 Ident_instancetype = nullptr;
474 Ident_final = nullptr;
475 Ident_sealed = nullptr;
476 Ident_override = nullptr;
478 Ident_super = &PP.getIdentifierTable().get("super");
480 Ident_vector = nullptr;
481 Ident_bool = nullptr;
482 Ident_pixel = nullptr;
483 if (getLangOpts().AltiVec || getLangOpts().ZVector) {
484 Ident_vector = &PP.getIdentifierTable().get("vector");
485 Ident_bool = &PP.getIdentifierTable().get("bool");
487 if (getLangOpts().AltiVec)
488 Ident_pixel = &PP.getIdentifierTable().get("pixel");
490 Ident_introduced = nullptr;
491 Ident_deprecated = nullptr;
492 Ident_obsoleted = nullptr;
493 Ident_unavailable = nullptr;
495 Ident__except = nullptr;
497 Ident__exception_code = Ident__exception_info = nullptr;
498 Ident__abnormal_termination = Ident___exception_code = nullptr;
499 Ident___exception_info = Ident___abnormal_termination = nullptr;
500 Ident_GetExceptionCode = Ident_GetExceptionInfo = nullptr;
501 Ident_AbnormalTermination = nullptr;
503 if(getLangOpts().Borland) {
504 Ident__exception_info = PP.getIdentifierInfo("_exception_info");
505 Ident___exception_info = PP.getIdentifierInfo("__exception_info");
506 Ident_GetExceptionInfo = PP.getIdentifierInfo("GetExceptionInformation");
507 Ident__exception_code = PP.getIdentifierInfo("_exception_code");
508 Ident___exception_code = PP.getIdentifierInfo("__exception_code");
509 Ident_GetExceptionCode = PP.getIdentifierInfo("GetExceptionCode");
510 Ident__abnormal_termination = PP.getIdentifierInfo("_abnormal_termination");
511 Ident___abnormal_termination = PP.getIdentifierInfo("__abnormal_termination");
512 Ident_AbnormalTermination = PP.getIdentifierInfo("AbnormalTermination");
514 PP.SetPoisonReason(Ident__exception_code,diag::err_seh___except_block);
515 PP.SetPoisonReason(Ident___exception_code,diag::err_seh___except_block);
516 PP.SetPoisonReason(Ident_GetExceptionCode,diag::err_seh___except_block);
517 PP.SetPoisonReason(Ident__exception_info,diag::err_seh___except_filter);
518 PP.SetPoisonReason(Ident___exception_info,diag::err_seh___except_filter);
519 PP.SetPoisonReason(Ident_GetExceptionInfo,diag::err_seh___except_filter);
520 PP.SetPoisonReason(Ident__abnormal_termination,diag::err_seh___finally_block);
521 PP.SetPoisonReason(Ident___abnormal_termination,diag::err_seh___finally_block);
522 PP.SetPoisonReason(Ident_AbnormalTermination,diag::err_seh___finally_block);
525 Actions.Initialize();
527 // Prime the lexer look-ahead.
531 void Parser::LateTemplateParserCleanupCallback(void *P) {
532 // While this RAII helper doesn't bracket any actual work, the destructor will
533 // clean up annotations that were created during ActOnEndOfTranslationUnit
534 // when incremental processing is enabled.
535 DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(((Parser *)P)->TemplateIds);
538 /// ParseTopLevelDecl - Parse one top-level declaration, return whatever the
539 /// action tells us to. This returns true if the EOF was encountered.
540 bool Parser::ParseTopLevelDecl(DeclGroupPtrTy &Result) {
541 DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
543 // Skip over the EOF token, flagging end of previous input for incremental
545 if (PP.isIncrementalProcessingEnabled() && Tok.is(tok::eof))
548 Result = DeclGroupPtrTy();
549 switch (Tok.getKind()) {
550 case tok::annot_pragma_unused:
551 HandlePragmaUnused();
554 case tok::annot_module_include:
555 Actions.ActOnModuleInclude(Tok.getLocation(),
556 reinterpret_cast<Module *>(
557 Tok.getAnnotationValue()));
561 case tok::annot_module_begin:
562 Actions.ActOnModuleBegin(Tok.getLocation(), reinterpret_cast<Module *>(
563 Tok.getAnnotationValue()));
567 case tok::annot_module_end:
568 Actions.ActOnModuleEnd(Tok.getLocation(), reinterpret_cast<Module *>(
569 Tok.getAnnotationValue()));
574 // Late template parsing can begin.
575 if (getLangOpts().DelayedTemplateParsing)
576 Actions.SetLateTemplateParser(LateTemplateParserCallback,
577 PP.isIncrementalProcessingEnabled() ?
578 LateTemplateParserCleanupCallback : nullptr,
580 if (!PP.isIncrementalProcessingEnabled())
581 Actions.ActOnEndOfTranslationUnit();
582 //else don't tell Sema that we ended parsing: more input might come.
589 ParsedAttributesWithRange attrs(AttrFactory);
590 MaybeParseCXX11Attributes(attrs);
591 MaybeParseMicrosoftAttributes(attrs);
593 Result = ParseExternalDeclaration(attrs);
597 /// ParseExternalDeclaration:
599 /// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl]
600 /// function-definition
602 /// [GNU] asm-definition
603 /// [GNU] __extension__ external-declaration
604 /// [OBJC] objc-class-definition
605 /// [OBJC] objc-class-declaration
606 /// [OBJC] objc-alias-declaration
607 /// [OBJC] objc-protocol-definition
608 /// [OBJC] objc-method-definition
610 /// [C++] linkage-specification
611 /// [GNU] asm-definition:
612 /// simple-asm-expr ';'
613 /// [C++11] empty-declaration
614 /// [C++11] attribute-declaration
616 /// [C++11] empty-declaration:
619 /// [C++0x/GNU] 'extern' 'template' declaration
620 Parser::DeclGroupPtrTy
621 Parser::ParseExternalDeclaration(ParsedAttributesWithRange &attrs,
622 ParsingDeclSpec *DS) {
623 DestroyTemplateIdAnnotationsRAIIObj CleanupRAII(TemplateIds);
624 ParenBraceBracketBalancer BalancerRAIIObj(*this);
626 if (PP.isCodeCompletionReached()) {
628 return DeclGroupPtrTy();
631 Decl *SingleDecl = nullptr;
632 switch (Tok.getKind()) {
633 case tok::annot_pragma_vis:
634 HandlePragmaVisibility();
635 return DeclGroupPtrTy();
636 case tok::annot_pragma_pack:
638 return DeclGroupPtrTy();
639 case tok::annot_pragma_msstruct:
640 HandlePragmaMSStruct();
641 return DeclGroupPtrTy();
642 case tok::annot_pragma_align:
644 return DeclGroupPtrTy();
645 case tok::annot_pragma_weak:
647 return DeclGroupPtrTy();
648 case tok::annot_pragma_weakalias:
649 HandlePragmaWeakAlias();
650 return DeclGroupPtrTy();
651 case tok::annot_pragma_redefine_extname:
652 HandlePragmaRedefineExtname();
653 return DeclGroupPtrTy();
654 case tok::annot_pragma_fp_contract:
655 HandlePragmaFPContract();
656 return DeclGroupPtrTy();
657 case tok::annot_pragma_opencl_extension:
658 HandlePragmaOpenCLExtension();
659 return DeclGroupPtrTy();
660 case tok::annot_pragma_openmp:
661 return ParseOpenMPDeclarativeDirective();
662 case tok::annot_pragma_ms_pointers_to_members:
663 HandlePragmaMSPointersToMembers();
664 return DeclGroupPtrTy();
665 case tok::annot_pragma_ms_vtordisp:
666 HandlePragmaMSVtorDisp();
667 return DeclGroupPtrTy();
668 case tok::annot_pragma_ms_pragma:
669 HandlePragmaMSPragma();
670 return DeclGroupPtrTy();
672 // Either a C++11 empty-declaration or attribute-declaration.
673 SingleDecl = Actions.ActOnEmptyDeclaration(getCurScope(),
676 ConsumeExtraSemi(OutsideFunction);
679 Diag(Tok, diag::err_extraneous_closing_brace);
681 return DeclGroupPtrTy();
683 Diag(Tok, diag::err_expected_external_declaration);
684 return DeclGroupPtrTy();
685 case tok::kw___extension__: {
686 // __extension__ silences extension warnings in the subexpression.
687 ExtensionRAIIObject O(Diags); // Use RAII to do this.
689 return ParseExternalDeclaration(attrs);
692 ProhibitAttributes(attrs);
694 SourceLocation StartLoc = Tok.getLocation();
695 SourceLocation EndLoc;
697 ExprResult Result(ParseSimpleAsm(&EndLoc));
699 // Check if GNU-style InlineAsm is disabled.
700 // Empty asm string is allowed because it will not introduce
701 // any assembly code.
702 if (!(getLangOpts().GNUAsm || Result.isInvalid())) {
703 const auto *SL = cast<StringLiteral>(Result.get());
704 if (!SL->getString().trim().empty())
705 Diag(StartLoc, diag::err_gnu_inline_asm_disabled);
708 ExpectAndConsume(tok::semi, diag::err_expected_after,
709 "top-level asm block");
711 if (Result.isInvalid())
712 return DeclGroupPtrTy();
713 SingleDecl = Actions.ActOnFileScopeAsmDecl(Result.get(), StartLoc, EndLoc);
717 return ParseObjCAtDirectives();
720 if (!getLangOpts().ObjC1) {
721 Diag(Tok, diag::err_expected_external_declaration);
723 return DeclGroupPtrTy();
725 SingleDecl = ParseObjCMethodDefinition();
727 case tok::code_completion:
728 Actions.CodeCompleteOrdinaryName(getCurScope(),
729 CurParsedObjCImpl? Sema::PCC_ObjCImplementation
730 : Sema::PCC_Namespace);
732 return DeclGroupPtrTy();
734 case tok::kw_namespace:
735 case tok::kw_typedef:
736 case tok::kw_template:
737 case tok::kw_export: // As in 'export template'
738 case tok::kw_static_assert:
739 case tok::kw__Static_assert:
740 // A function definition cannot start with any of these keywords.
742 SourceLocation DeclEnd;
743 return ParseDeclaration(Declarator::FileContext, DeclEnd, attrs);
747 // Parse (then ignore) 'static' prior to a template instantiation. This is
748 // a GCC extension that we intentionally do not support.
749 if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
750 Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
752 SourceLocation DeclEnd;
753 return ParseDeclaration(Declarator::FileContext, DeclEnd, attrs);
758 if (getLangOpts().CPlusPlus) {
759 tok::TokenKind NextKind = NextToken().getKind();
761 // Inline namespaces. Allowed as an extension even in C++03.
762 if (NextKind == tok::kw_namespace) {
763 SourceLocation DeclEnd;
764 return ParseDeclaration(Declarator::FileContext, DeclEnd, attrs);
767 // Parse (then ignore) 'inline' prior to a template instantiation. This is
768 // a GCC extension that we intentionally do not support.
769 if (NextKind == tok::kw_template) {
770 Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
772 SourceLocation DeclEnd;
773 return ParseDeclaration(Declarator::FileContext, DeclEnd, attrs);
779 if (getLangOpts().CPlusPlus && NextToken().is(tok::kw_template)) {
781 SourceLocation ExternLoc = ConsumeToken();
782 SourceLocation TemplateLoc = ConsumeToken();
783 Diag(ExternLoc, getLangOpts().CPlusPlus11 ?
784 diag::warn_cxx98_compat_extern_template :
785 diag::ext_extern_template) << SourceRange(ExternLoc, TemplateLoc);
786 SourceLocation DeclEnd;
787 return Actions.ConvertDeclToDeclGroup(
788 ParseExplicitInstantiation(Declarator::FileContext,
789 ExternLoc, TemplateLoc, DeclEnd));
793 case tok::kw___if_exists:
794 case tok::kw___if_not_exists:
795 ParseMicrosoftIfExistsExternalDeclaration();
796 return DeclGroupPtrTy();
800 // We can't tell whether this is a function-definition or declaration yet.
801 return ParseDeclarationOrFunctionDefinition(attrs, DS);
804 // This routine returns a DeclGroup, if the thing we parsed only contains a
805 // single decl, convert it now.
806 return Actions.ConvertDeclToDeclGroup(SingleDecl);
809 /// \brief Determine whether the current token, if it occurs after a
810 /// declarator, continues a declaration or declaration list.
811 bool Parser::isDeclarationAfterDeclarator() {
812 // Check for '= delete' or '= default'
813 if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
814 const Token &KW = NextToken();
815 if (KW.is(tok::kw_default) || KW.is(tok::kw_delete))
819 return Tok.is(tok::equal) || // int X()= -> not a function def
820 Tok.is(tok::comma) || // int X(), -> not a function def
821 Tok.is(tok::semi) || // int X(); -> not a function def
822 Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def
823 Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def
824 (getLangOpts().CPlusPlus &&
825 Tok.is(tok::l_paren)); // int X(0) -> not a function def [C++]
828 /// \brief Determine whether the current token, if it occurs after a
829 /// declarator, indicates the start of a function definition.
830 bool Parser::isStartOfFunctionDefinition(const ParsingDeclarator &Declarator) {
831 assert(Declarator.isFunctionDeclarator() && "Isn't a function declarator");
832 if (Tok.is(tok::l_brace)) // int X() {}
835 // Handle K&R C argument lists: int X(f) int f; {}
836 if (!getLangOpts().CPlusPlus &&
837 Declarator.getFunctionTypeInfo().isKNRPrototype())
838 return isDeclarationSpecifier();
840 if (getLangOpts().CPlusPlus && Tok.is(tok::equal)) {
841 const Token &KW = NextToken();
842 return KW.is(tok::kw_default) || KW.is(tok::kw_delete);
845 return Tok.is(tok::colon) || // X() : Base() {} (used for ctors)
846 Tok.is(tok::kw_try); // X() try { ... }
849 /// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or
850 /// a declaration. We can't tell which we have until we read up to the
851 /// compound-statement in function-definition. TemplateParams, if
852 /// non-NULL, provides the template parameters when we're parsing a
853 /// C++ template-declaration.
855 /// function-definition: [C99 6.9.1]
856 /// decl-specs declarator declaration-list[opt] compound-statement
857 /// [C90] function-definition: [C99 6.7.1] - implicit int result
858 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
860 /// declaration: [C99 6.7]
861 /// declaration-specifiers init-declarator-list[opt] ';'
862 /// [!C99] init-declarator-list ';' [TODO: warn in c99 mode]
863 /// [OMP] threadprivate-directive [TODO]
865 Parser::DeclGroupPtrTy
866 Parser::ParseDeclOrFunctionDefInternal(ParsedAttributesWithRange &attrs,
868 AccessSpecifier AS) {
869 // Parse the common declaration-specifiers piece.
870 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS, DSC_top_level);
872 // If we had a free-standing type definition with a missing semicolon, we
873 // may get this far before the problem becomes obvious.
874 if (DS.hasTagDefinition() &&
875 DiagnoseMissingSemiAfterTagDefinition(DS, AS, DSC_top_level))
876 return DeclGroupPtrTy();
878 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };"
879 // declaration-specifiers init-declarator-list[opt] ';'
880 if (Tok.is(tok::semi)) {
881 ProhibitAttributes(attrs);
883 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS);
884 DS.complete(TheDecl);
885 return Actions.ConvertDeclToDeclGroup(TheDecl);
888 DS.takeAttributesFrom(attrs);
890 // ObjC2 allows prefix attributes on class interfaces and protocols.
891 // FIXME: This still needs better diagnostics. We should only accept
892 // attributes here, no types, etc.
893 if (getLangOpts().ObjC2 && Tok.is(tok::at)) {
894 SourceLocation AtLoc = ConsumeToken(); // the "@"
895 if (!Tok.isObjCAtKeyword(tok::objc_interface) &&
896 !Tok.isObjCAtKeyword(tok::objc_protocol)) {
897 Diag(Tok, diag::err_objc_unexpected_attr);
898 SkipUntil(tok::semi); // FIXME: better skip?
899 return DeclGroupPtrTy();
904 const char *PrevSpec = nullptr;
906 if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec, DiagID,
907 Actions.getASTContext().getPrintingPolicy()))
908 Diag(AtLoc, DiagID) << PrevSpec;
910 if (Tok.isObjCAtKeyword(tok::objc_protocol))
911 return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes());
913 return Actions.ConvertDeclToDeclGroup(
914 ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()));
917 // If the declspec consisted only of 'extern' and we have a string
918 // literal following it, this must be a C++ linkage specifier like
920 if (getLangOpts().CPlusPlus && isTokenStringLiteral() &&
921 DS.getStorageClassSpec() == DeclSpec::SCS_extern &&
922 DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) {
923 Decl *TheDecl = ParseLinkage(DS, Declarator::FileContext);
924 return Actions.ConvertDeclToDeclGroup(TheDecl);
927 return ParseDeclGroup(DS, Declarator::FileContext);
930 Parser::DeclGroupPtrTy
931 Parser::ParseDeclarationOrFunctionDefinition(ParsedAttributesWithRange &attrs,
933 AccessSpecifier AS) {
935 return ParseDeclOrFunctionDefInternal(attrs, *DS, AS);
937 ParsingDeclSpec PDS(*this);
938 // Must temporarily exit the objective-c container scope for
939 // parsing c constructs and re-enter objc container scope
941 ObjCDeclContextSwitch ObjCDC(*this);
943 return ParseDeclOrFunctionDefInternal(attrs, PDS, AS);
947 /// ParseFunctionDefinition - We parsed and verified that the specified
948 /// Declarator is well formed. If this is a K&R-style function, read the
949 /// parameters declaration-list, then start the compound-statement.
951 /// function-definition: [C99 6.9.1]
952 /// decl-specs declarator declaration-list[opt] compound-statement
953 /// [C90] function-definition: [C99 6.7.1] - implicit int result
954 /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement
955 /// [C++] function-definition: [C++ 8.4]
956 /// decl-specifier-seq[opt] declarator ctor-initializer[opt]
958 /// [C++] function-definition: [C++ 8.4]
959 /// decl-specifier-seq[opt] declarator function-try-block
961 Decl *Parser::ParseFunctionDefinition(ParsingDeclarator &D,
962 const ParsedTemplateInfo &TemplateInfo,
963 LateParsedAttrList *LateParsedAttrs) {
964 // Poison SEH identifiers so they are flagged as illegal in function bodies.
965 PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true);
966 const DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo();
968 // If this is C90 and the declspecs were completely missing, fudge in an
969 // implicit int. We do this here because this is the only place where
970 // declaration-specifiers are completely optional in the grammar.
971 if (getLangOpts().ImplicitInt && D.getDeclSpec().isEmpty()) {
972 const char *PrevSpec;
974 const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
975 D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int,
976 D.getIdentifierLoc(),
979 D.SetRangeBegin(D.getDeclSpec().getSourceRange().getBegin());
982 // If this declaration was formed with a K&R-style identifier list for the
983 // arguments, parse declarations for all of the args next.
984 // int foo(a,b) int a; float b; {}
985 if (FTI.isKNRPrototype())
986 ParseKNRParamDeclarations(D);
988 // We should have either an opening brace or, in a C++ constructor,
989 // we may have a colon.
990 if (Tok.isNot(tok::l_brace) &&
991 (!getLangOpts().CPlusPlus ||
992 (Tok.isNot(tok::colon) && Tok.isNot(tok::kw_try) &&
993 Tok.isNot(tok::equal)))) {
994 Diag(Tok, diag::err_expected_fn_body);
996 // Skip over garbage, until we get to '{'. Don't eat the '{'.
997 SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
999 // If we didn't find the '{', bail out.
1000 if (Tok.isNot(tok::l_brace))
1004 // Check to make sure that any normal attributes are allowed to be on
1005 // a definition. Late parsed attributes are checked at the end.
1006 if (Tok.isNot(tok::equal)) {
1007 AttributeList *DtorAttrs = D.getAttributes();
1009 if (DtorAttrs->isKnownToGCC() &&
1010 !DtorAttrs->isCXX11Attribute()) {
1011 Diag(DtorAttrs->getLoc(), diag::warn_attribute_on_function_definition)
1012 << DtorAttrs->getName();
1014 DtorAttrs = DtorAttrs->getNext();
1018 // In delayed template parsing mode, for function template we consume the
1019 // tokens and store them for late parsing at the end of the translation unit.
1020 if (getLangOpts().DelayedTemplateParsing && Tok.isNot(tok::equal) &&
1021 TemplateInfo.Kind == ParsedTemplateInfo::Template &&
1022 Actions.canDelayFunctionBody(D)) {
1023 MultiTemplateParamsArg TemplateParameterLists(*TemplateInfo.TemplateParams);
1025 ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
1026 Scope *ParentScope = getCurScope()->getParent();
1028 D.setFunctionDefinitionKind(FDK_Definition);
1029 Decl *DP = Actions.HandleDeclarator(ParentScope, D,
1030 TemplateParameterLists);
1032 D.getMutableDeclSpec().abort();
1035 LexTemplateFunctionForLateParsing(Toks);
1038 FunctionDecl *FnD = DP->getAsFunction();
1039 Actions.CheckForFunctionRedefinition(FnD);
1040 Actions.MarkAsLateParsedTemplate(FnD, DP, Toks);
1044 else if (CurParsedObjCImpl &&
1045 !TemplateInfo.TemplateParams &&
1046 (Tok.is(tok::l_brace) || Tok.is(tok::kw_try) ||
1047 Tok.is(tok::colon)) &&
1048 Actions.CurContext->isTranslationUnit()) {
1049 ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
1050 Scope *ParentScope = getCurScope()->getParent();
1052 D.setFunctionDefinitionKind(FDK_Definition);
1053 Decl *FuncDecl = Actions.HandleDeclarator(ParentScope, D,
1054 MultiTemplateParamsArg());
1055 D.complete(FuncDecl);
1056 D.getMutableDeclSpec().abort();
1058 // Consume the tokens and store them for later parsing.
1059 StashAwayMethodOrFunctionBodyTokens(FuncDecl);
1060 CurParsedObjCImpl->HasCFunction = true;
1063 // FIXME: Should we really fall through here?
1066 // Enter a scope for the function body.
1067 ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope);
1069 // Tell the actions module that we have entered a function definition with the
1070 // specified Declarator for the function.
1071 Sema::SkipBodyInfo SkipBody;
1072 Decl *Res = Actions.ActOnStartOfFunctionDef(getCurScope(), D,
1073 TemplateInfo.TemplateParams
1074 ? *TemplateInfo.TemplateParams
1075 : MultiTemplateParamsArg(),
1078 if (SkipBody.ShouldSkip) {
1083 // Break out of the ParsingDeclarator context before we parse the body.
1086 // Break out of the ParsingDeclSpec context, too. This const_cast is
1087 // safe because we're always the sole owner.
1088 D.getMutableDeclSpec().abort();
1090 if (TryConsumeToken(tok::equal)) {
1091 assert(getLangOpts().CPlusPlus && "Only C++ function definitions have '='");
1093 bool Delete = false;
1094 SourceLocation KWLoc;
1095 if (TryConsumeToken(tok::kw_delete, KWLoc)) {
1096 Diag(KWLoc, getLangOpts().CPlusPlus11
1097 ? diag::warn_cxx98_compat_defaulted_deleted_function
1098 : diag::ext_defaulted_deleted_function)
1100 Actions.SetDeclDeleted(Res, KWLoc);
1102 } else if (TryConsumeToken(tok::kw_default, KWLoc)) {
1103 Diag(KWLoc, getLangOpts().CPlusPlus11
1104 ? diag::warn_cxx98_compat_defaulted_deleted_function
1105 : diag::ext_defaulted_deleted_function)
1106 << 0 /* defaulted */;
1107 Actions.SetDeclDefaulted(Res, KWLoc);
1109 llvm_unreachable("function definition after = not 'delete' or 'default'");
1112 if (Tok.is(tok::comma)) {
1113 Diag(KWLoc, diag::err_default_delete_in_multiple_declaration)
1115 SkipUntil(tok::semi);
1116 } else if (ExpectAndConsume(tok::semi, diag::err_expected_after,
1117 Delete ? "delete" : "default")) {
1118 SkipUntil(tok::semi);
1121 Stmt *GeneratedBody = Res ? Res->getBody() : nullptr;
1122 Actions.ActOnFinishFunctionBody(Res, GeneratedBody, false);
1126 if (Tok.is(tok::kw_try))
1127 return ParseFunctionTryBlock(Res, BodyScope);
1129 // If we have a colon, then we're probably parsing a C++
1130 // ctor-initializer.
1131 if (Tok.is(tok::colon)) {
1132 ParseConstructorInitializer(Res);
1134 // Recover from error.
1135 if (!Tok.is(tok::l_brace)) {
1137 Actions.ActOnFinishFunctionBody(Res, nullptr);
1141 Actions.ActOnDefaultCtorInitializers(Res);
1143 // Late attributes are parsed in the same scope as the function body.
1144 if (LateParsedAttrs)
1145 ParseLexedAttributeList(*LateParsedAttrs, Res, false, true);
1147 return ParseFunctionStatementBody(Res, BodyScope);
1150 void Parser::SkipFunctionBody() {
1151 if (Tok.is(tok::equal)) {
1152 SkipUntil(tok::semi);
1156 bool IsFunctionTryBlock = Tok.is(tok::kw_try);
1157 if (IsFunctionTryBlock)
1160 CachedTokens Skipped;
1161 if (ConsumeAndStoreFunctionPrologue(Skipped))
1162 SkipMalformedDecl();
1164 SkipUntil(tok::r_brace);
1165 while (IsFunctionTryBlock && Tok.is(tok::kw_catch)) {
1166 SkipUntil(tok::l_brace);
1167 SkipUntil(tok::r_brace);
1172 /// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides
1173 /// types for a function with a K&R-style identifier list for arguments.
1174 void Parser::ParseKNRParamDeclarations(Declarator &D) {
1175 // We know that the top-level of this declarator is a function.
1176 DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo();
1178 // Enter function-declaration scope, limiting any declarators to the
1179 // function prototype scope, including parameter declarators.
1180 ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
1181 Scope::FunctionDeclarationScope | Scope::DeclScope);
1183 // Read all the argument declarations.
1184 while (isDeclarationSpecifier()) {
1185 SourceLocation DSStart = Tok.getLocation();
1187 // Parse the common declaration-specifiers piece.
1188 DeclSpec DS(AttrFactory);
1189 ParseDeclarationSpecifiers(DS);
1191 // C99 6.9.1p6: 'each declaration in the declaration list shall have at
1192 // least one declarator'.
1193 // NOTE: GCC just makes this an ext-warn. It's not clear what it does with
1194 // the declarations though. It's trivial to ignore them, really hard to do
1195 // anything else with them.
1196 if (TryConsumeToken(tok::semi)) {
1197 Diag(DSStart, diag::err_declaration_does_not_declare_param);
1201 // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other
1203 if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified &&
1204 DS.getStorageClassSpec() != DeclSpec::SCS_register) {
1205 Diag(DS.getStorageClassSpecLoc(),
1206 diag::err_invalid_storage_class_in_func_decl);
1207 DS.ClearStorageClassSpecs();
1209 if (DS.getThreadStorageClassSpec() != DeclSpec::TSCS_unspecified) {
1210 Diag(DS.getThreadStorageClassSpecLoc(),
1211 diag::err_invalid_storage_class_in_func_decl);
1212 DS.ClearStorageClassSpecs();
1215 // Parse the first declarator attached to this declspec.
1216 Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext);
1217 ParseDeclarator(ParmDeclarator);
1219 // Handle the full declarator list.
1221 // If attributes are present, parse them.
1222 MaybeParseGNUAttributes(ParmDeclarator);
1224 // Ask the actions module to compute the type for this declarator.
1226 Actions.ActOnParamDeclarator(getCurScope(), ParmDeclarator);
1229 // A missing identifier has already been diagnosed.
1230 ParmDeclarator.getIdentifier()) {
1232 // Scan the argument list looking for the correct param to apply this
1234 for (unsigned i = 0; ; ++i) {
1235 // C99 6.9.1p6: those declarators shall declare only identifiers from
1236 // the identifier list.
1237 if (i == FTI.NumParams) {
1238 Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param)
1239 << ParmDeclarator.getIdentifier();
1243 if (FTI.Params[i].Ident == ParmDeclarator.getIdentifier()) {
1244 // Reject redefinitions of parameters.
1245 if (FTI.Params[i].Param) {
1246 Diag(ParmDeclarator.getIdentifierLoc(),
1247 diag::err_param_redefinition)
1248 << ParmDeclarator.getIdentifier();
1250 FTI.Params[i].Param = Param;
1257 // If we don't have a comma, it is either the end of the list (a ';') or
1258 // an error, bail out.
1259 if (Tok.isNot(tok::comma))
1262 ParmDeclarator.clear();
1264 // Consume the comma.
1265 ParmDeclarator.setCommaLoc(ConsumeToken());
1267 // Parse the next declarator.
1268 ParseDeclarator(ParmDeclarator);
1271 // Consume ';' and continue parsing.
1272 if (!ExpectAndConsumeSemi(diag::err_expected_semi_declaration))
1275 // Otherwise recover by skipping to next semi or mandatory function body.
1276 if (SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch))
1278 TryConsumeToken(tok::semi);
1281 // The actions module must verify that all arguments were declared.
1282 Actions.ActOnFinishKNRParamDeclarations(getCurScope(), D, Tok.getLocation());
1286 /// ParseAsmStringLiteral - This is just a normal string-literal, but is not
1287 /// allowed to be a wide string, and is not subject to character translation.
1289 /// [GNU] asm-string-literal:
1292 ExprResult Parser::ParseAsmStringLiteral() {
1293 if (!isTokenStringLiteral()) {
1294 Diag(Tok, diag::err_expected_string_literal)
1295 << /*Source='in...'*/0 << "'asm'";
1299 ExprResult AsmString(ParseStringLiteralExpression());
1300 if (!AsmString.isInvalid()) {
1301 const auto *SL = cast<StringLiteral>(AsmString.get());
1302 if (!SL->isAscii()) {
1303 Diag(Tok, diag::err_asm_operand_wide_string_literal)
1305 << SL->getSourceRange();
1314 /// [GNU] simple-asm-expr:
1315 /// 'asm' '(' asm-string-literal ')'
1317 ExprResult Parser::ParseSimpleAsm(SourceLocation *EndLoc) {
1318 assert(Tok.is(tok::kw_asm) && "Not an asm!");
1319 SourceLocation Loc = ConsumeToken();
1321 if (Tok.is(tok::kw_volatile)) {
1322 // Remove from the end of 'asm' to the end of 'volatile'.
1323 SourceRange RemovalRange(PP.getLocForEndOfToken(Loc),
1324 PP.getLocForEndOfToken(Tok.getLocation()));
1326 Diag(Tok, diag::warn_file_asm_volatile)
1327 << FixItHint::CreateRemoval(RemovalRange);
1331 BalancedDelimiterTracker T(*this, tok::l_paren);
1332 if (T.consumeOpen()) {
1333 Diag(Tok, diag::err_expected_lparen_after) << "asm";
1337 ExprResult Result(ParseAsmStringLiteral());
1339 if (!Result.isInvalid()) {
1340 // Close the paren and get the location of the end bracket
1343 *EndLoc = T.getCloseLocation();
1344 } else if (SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch)) {
1346 *EndLoc = Tok.getLocation();
1353 /// \brief Get the TemplateIdAnnotation from the token and put it in the
1354 /// cleanup pool so that it gets destroyed when parsing the current top level
1355 /// declaration is finished.
1356 TemplateIdAnnotation *Parser::takeTemplateIdAnnotation(const Token &tok) {
1357 assert(tok.is(tok::annot_template_id) && "Expected template-id token");
1358 TemplateIdAnnotation *
1359 Id = static_cast<TemplateIdAnnotation *>(tok.getAnnotationValue());
1363 void Parser::AnnotateScopeToken(CXXScopeSpec &SS, bool IsNewAnnotation) {
1364 // Push the current token back into the token stream (or revert it if it is
1365 // cached) and use an annotation scope token for current token.
1366 if (PP.isBacktrackEnabled())
1367 PP.RevertCachedTokens(1);
1370 Tok.setKind(tok::annot_cxxscope);
1371 Tok.setAnnotationValue(Actions.SaveNestedNameSpecifierAnnotation(SS));
1372 Tok.setAnnotationRange(SS.getRange());
1374 // In case the tokens were cached, have Preprocessor replace them
1375 // with the annotation token. We don't need to do this if we've
1376 // just reverted back to a prior state.
1377 if (IsNewAnnotation)
1378 PP.AnnotateCachedTokens(Tok);
1381 /// \brief Attempt to classify the name at the current token position. This may
1382 /// form a type, scope or primary expression annotation, or replace the token
1383 /// with a typo-corrected keyword. This is only appropriate when the current
1384 /// name must refer to an entity which has already been declared.
1386 /// \param IsAddressOfOperand Must be \c true if the name is preceded by an '&'
1387 /// and might possibly have a dependent nested name specifier.
1388 /// \param CCC Indicates how to perform typo-correction for this name. If NULL,
1389 /// no typo correction will be performed.
1390 Parser::AnnotatedNameKind
1391 Parser::TryAnnotateName(bool IsAddressOfOperand,
1392 std::unique_ptr<CorrectionCandidateCallback> CCC) {
1393 assert(Tok.is(tok::identifier) || Tok.is(tok::annot_cxxscope));
1395 const bool EnteringContext = false;
1396 const bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
1399 if (getLangOpts().CPlusPlus &&
1400 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
1403 if (Tok.isNot(tok::identifier) || SS.isInvalid()) {
1404 if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, false, SS,
1405 !WasScopeAnnotation))
1407 return ANK_Unresolved;
1410 IdentifierInfo *Name = Tok.getIdentifierInfo();
1411 SourceLocation NameLoc = Tok.getLocation();
1413 // FIXME: Move the tentative declaration logic into ClassifyName so we can
1414 // typo-correct to tentatively-declared identifiers.
1415 if (isTentativelyDeclared(Name)) {
1416 // Identifier has been tentatively declared, and thus cannot be resolved as
1417 // an expression. Fall back to annotating it as a type.
1418 if (TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, false, SS,
1419 !WasScopeAnnotation))
1421 return Tok.is(tok::annot_typename) ? ANK_Success : ANK_TentativeDecl;
1424 Token Next = NextToken();
1426 // Look up and classify the identifier. We don't perform any typo-correction
1427 // after a scope specifier, because in general we can't recover from typos
1428 // there (eg, after correcting 'A::tempalte B<X>::C' [sic], we would need to
1429 // jump back into scope specifier parsing).
1430 Sema::NameClassification Classification = Actions.ClassifyName(
1431 getCurScope(), SS, Name, NameLoc, Next, IsAddressOfOperand,
1432 SS.isEmpty() ? std::move(CCC) : nullptr);
1434 switch (Classification.getKind()) {
1435 case Sema::NC_Error:
1438 case Sema::NC_Keyword:
1439 // The identifier was typo-corrected to a keyword.
1440 Tok.setIdentifierInfo(Name);
1441 Tok.setKind(Name->getTokenID());
1442 PP.TypoCorrectToken(Tok);
1443 if (SS.isNotEmpty())
1444 AnnotateScopeToken(SS, !WasScopeAnnotation);
1445 // We've "annotated" this as a keyword.
1448 case Sema::NC_Unknown:
1449 // It's not something we know about. Leave it unannotated.
1452 case Sema::NC_Type: {
1453 SourceLocation BeginLoc = NameLoc;
1454 if (SS.isNotEmpty())
1455 BeginLoc = SS.getBeginLoc();
1457 /// An Objective-C object type followed by '<' is a specialization of
1458 /// a parameterized class type or a protocol-qualified type.
1459 ParsedType Ty = Classification.getType();
1460 if (getLangOpts().ObjC1 && NextToken().is(tok::less) &&
1461 (Ty.get()->isObjCObjectType() ||
1462 Ty.get()->isObjCObjectPointerType())) {
1463 // Consume the name.
1464 SourceLocation IdentifierLoc = ConsumeToken();
1465 SourceLocation NewEndLoc;
1467 = parseObjCTypeArgsAndProtocolQualifiers(IdentifierLoc, Ty,
1468 /*consumeLastToken=*/false,
1470 if (NewType.isUsable())
1474 Tok.setKind(tok::annot_typename);
1475 setTypeAnnotation(Tok, Ty);
1476 Tok.setAnnotationEndLoc(Tok.getLocation());
1477 Tok.setLocation(BeginLoc);
1478 PP.AnnotateCachedTokens(Tok);
1482 case Sema::NC_Expression:
1483 Tok.setKind(tok::annot_primary_expr);
1484 setExprAnnotation(Tok, Classification.getExpression());
1485 Tok.setAnnotationEndLoc(NameLoc);
1486 if (SS.isNotEmpty())
1487 Tok.setLocation(SS.getBeginLoc());
1488 PP.AnnotateCachedTokens(Tok);
1491 case Sema::NC_TypeTemplate:
1492 if (Next.isNot(tok::less)) {
1493 // This may be a type template being used as a template template argument.
1494 if (SS.isNotEmpty())
1495 AnnotateScopeToken(SS, !WasScopeAnnotation);
1496 return ANK_TemplateName;
1499 case Sema::NC_VarTemplate:
1500 case Sema::NC_FunctionTemplate: {
1501 // We have a type, variable or function template followed by '<'.
1504 Id.setIdentifier(Name, NameLoc);
1505 if (AnnotateTemplateIdToken(
1506 TemplateTy::make(Classification.getTemplateName()),
1507 Classification.getTemplateNameKind(), SS, SourceLocation(), Id))
1512 case Sema::NC_NestedNameSpecifier:
1513 llvm_unreachable("already parsed nested name specifier");
1516 // Unable to classify the name, but maybe we can annotate a scope specifier.
1517 if (SS.isNotEmpty())
1518 AnnotateScopeToken(SS, !WasScopeAnnotation);
1519 return ANK_Unresolved;
1522 bool Parser::TryKeywordIdentFallback(bool DisableKeyword) {
1523 assert(Tok.isNot(tok::identifier));
1524 Diag(Tok, diag::ext_keyword_as_ident)
1525 << PP.getSpelling(Tok)
1528 Tok.getIdentifierInfo()->revertTokenIDToIdentifier();
1529 Tok.setKind(tok::identifier);
1533 /// TryAnnotateTypeOrScopeToken - If the current token position is on a
1534 /// typename (possibly qualified in C++) or a C++ scope specifier not followed
1535 /// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens
1536 /// with a single annotation token representing the typename or C++ scope
1538 /// This simplifies handling of C++ scope specifiers and allows efficient
1539 /// backtracking without the need to re-parse and resolve nested-names and
1541 /// It will mainly be called when we expect to treat identifiers as typenames
1542 /// (if they are typenames). For example, in C we do not expect identifiers
1543 /// inside expressions to be treated as typenames so it will not be called
1544 /// for expressions in C.
1545 /// The benefit for C/ObjC is that a typename will be annotated and
1546 /// Actions.getTypeName will not be needed to be called again (e.g. getTypeName
1547 /// will not be called twice, once to check whether we have a declaration
1548 /// specifier, and another one to get the actual type inside
1549 /// ParseDeclarationSpecifiers).
1551 /// This returns true if an error occurred.
1553 /// Note that this routine emits an error if you call it with ::new or ::delete
1554 /// as the current tokens, so only call it in contexts where these are invalid.
1555 bool Parser::TryAnnotateTypeOrScopeToken(bool EnteringContext, bool NeedType) {
1556 assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
1557 Tok.is(tok::kw_typename) || Tok.is(tok::annot_cxxscope) ||
1558 Tok.is(tok::kw_decltype) || Tok.is(tok::annot_template_id) ||
1559 Tok.is(tok::kw___super)) &&
1560 "Cannot be a type or scope token!");
1562 if (Tok.is(tok::kw_typename)) {
1563 // MSVC lets you do stuff like:
1564 // typename typedef T_::D D;
1566 // We will consume the typedef token here and put it back after we have
1567 // parsed the first identifier, transforming it into something more like:
1568 // typename T_::D typedef D;
1569 if (getLangOpts().MSVCCompat && NextToken().is(tok::kw_typedef)) {
1571 PP.Lex(TypedefToken);
1572 bool Result = TryAnnotateTypeOrScopeToken(EnteringContext, NeedType);
1576 Diag(Tok.getLocation(), diag::warn_expected_qualified_after_typename);
1580 // Parse a C++ typename-specifier, e.g., "typename T::type".
1582 // typename-specifier:
1583 // 'typename' '::' [opt] nested-name-specifier identifier
1584 // 'typename' '::' [opt] nested-name-specifier template [opt]
1585 // simple-template-id
1586 SourceLocation TypenameLoc = ConsumeToken();
1588 if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/ParsedType(),
1589 /*EnteringContext=*/false,
1590 nullptr, /*IsTypename*/ true))
1593 if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id) ||
1594 Tok.is(tok::annot_decltype)) {
1595 // Attempt to recover by skipping the invalid 'typename'
1596 if (Tok.is(tok::annot_decltype) ||
1597 (!TryAnnotateTypeOrScopeToken(EnteringContext, NeedType) &&
1598 Tok.isAnnotation())) {
1599 unsigned DiagID = diag::err_expected_qualified_after_typename;
1600 // MS compatibility: MSVC permits using known types with typename.
1601 // e.g. "typedef typename T* pointer_type"
1602 if (getLangOpts().MicrosoftExt)
1603 DiagID = diag::warn_expected_qualified_after_typename;
1604 Diag(Tok.getLocation(), DiagID);
1609 Diag(Tok.getLocation(), diag::err_expected_qualified_after_typename);
1614 if (Tok.is(tok::identifier)) {
1615 // FIXME: check whether the next token is '<', first!
1616 Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
1617 *Tok.getIdentifierInfo(),
1619 } else if (Tok.is(tok::annot_template_id)) {
1620 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1621 if (TemplateId->Kind != TNK_Type_template &&
1622 TemplateId->Kind != TNK_Dependent_template_name) {
1623 Diag(Tok, diag::err_typename_refers_to_non_type_template)
1624 << Tok.getAnnotationRange();
1628 ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
1629 TemplateId->NumArgs);
1631 Ty = Actions.ActOnTypenameType(getCurScope(), TypenameLoc, SS,
1632 TemplateId->TemplateKWLoc,
1633 TemplateId->Template,
1634 TemplateId->TemplateNameLoc,
1635 TemplateId->LAngleLoc,
1637 TemplateId->RAngleLoc);
1639 Diag(Tok, diag::err_expected_type_name_after_typename)
1644 SourceLocation EndLoc = Tok.getLastLoc();
1645 Tok.setKind(tok::annot_typename);
1646 setTypeAnnotation(Tok, Ty.isInvalid() ? ParsedType() : Ty.get());
1647 Tok.setAnnotationEndLoc(EndLoc);
1648 Tok.setLocation(TypenameLoc);
1649 PP.AnnotateCachedTokens(Tok);
1653 // Remembers whether the token was originally a scope annotation.
1654 bool WasScopeAnnotation = Tok.is(tok::annot_cxxscope);
1657 if (getLangOpts().CPlusPlus)
1658 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
1661 return TryAnnotateTypeOrScopeTokenAfterScopeSpec(EnteringContext, NeedType,
1662 SS, !WasScopeAnnotation);
1665 /// \brief Try to annotate a type or scope token, having already parsed an
1666 /// optional scope specifier. \p IsNewScope should be \c true unless the scope
1667 /// specifier was extracted from an existing tok::annot_cxxscope annotation.
1668 bool Parser::TryAnnotateTypeOrScopeTokenAfterScopeSpec(bool EnteringContext,
1672 if (Tok.is(tok::identifier)) {
1673 IdentifierInfo *CorrectedII = nullptr;
1674 // Determine whether the identifier is a type name.
1675 if (ParsedType Ty = Actions.getTypeName(*Tok.getIdentifierInfo(),
1676 Tok.getLocation(), getCurScope(),
1678 NextToken().is(tok::period),
1680 /*IsCtorOrDtorName=*/false,
1681 /*NonTrivialTypeSourceInfo*/ true,
1682 NeedType ? &CorrectedII
1684 // A FixIt was applied as a result of typo correction
1686 Tok.setIdentifierInfo(CorrectedII);
1688 SourceLocation BeginLoc = Tok.getLocation();
1689 if (SS.isNotEmpty()) // it was a C++ qualified type name.
1690 BeginLoc = SS.getBeginLoc();
1692 /// An Objective-C object type followed by '<' is a specialization of
1693 /// a parameterized class type or a protocol-qualified type.
1694 if (getLangOpts().ObjC1 && NextToken().is(tok::less) &&
1695 (Ty.get()->isObjCObjectType() ||
1696 Ty.get()->isObjCObjectPointerType())) {
1697 // Consume the name.
1698 SourceLocation IdentifierLoc = ConsumeToken();
1699 SourceLocation NewEndLoc;
1701 = parseObjCTypeArgsAndProtocolQualifiers(IdentifierLoc, Ty,
1702 /*consumeLastToken=*/false,
1704 if (NewType.isUsable())
1708 // This is a typename. Replace the current token in-place with an
1709 // annotation type token.
1710 Tok.setKind(tok::annot_typename);
1711 setTypeAnnotation(Tok, Ty);
1712 Tok.setAnnotationEndLoc(Tok.getLocation());
1713 Tok.setLocation(BeginLoc);
1715 // In case the tokens were cached, have Preprocessor replace
1716 // them with the annotation token.
1717 PP.AnnotateCachedTokens(Tok);
1721 if (!getLangOpts().CPlusPlus) {
1722 // If we're in C, we can't have :: tokens at all (the lexer won't return
1723 // them). If the identifier is not a type, then it can't be scope either,
1728 // If this is a template-id, annotate with a template-id or type token.
1729 if (NextToken().is(tok::less)) {
1730 TemplateTy Template;
1731 UnqualifiedId TemplateName;
1732 TemplateName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
1733 bool MemberOfUnknownSpecialization;
1734 if (TemplateNameKind TNK
1735 = Actions.isTemplateName(getCurScope(), SS,
1736 /*hasTemplateKeyword=*/false, TemplateName,
1737 /*ObjectType=*/ ParsedType(),
1739 Template, MemberOfUnknownSpecialization)) {
1740 // Consume the identifier.
1742 if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(),
1744 // If an unrecoverable error occurred, we need to return true here,
1745 // because the token stream is in a damaged state. We may not return
1746 // a valid identifier.
1752 // The current token, which is either an identifier or a
1753 // template-id, is not part of the annotation. Fall through to
1754 // push that token back into the stream and complete the C++ scope
1755 // specifier annotation.
1758 if (Tok.is(tok::annot_template_id)) {
1759 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1760 if (TemplateId->Kind == TNK_Type_template) {
1761 // A template-id that refers to a type was parsed into a
1762 // template-id annotation in a context where we weren't allowed
1763 // to produce a type annotation token. Update the template-id
1764 // annotation token to a type annotation token now.
1765 AnnotateTemplateIdTokenAsType();
1773 // A C++ scope specifier that isn't followed by a typename.
1774 AnnotateScopeToken(SS, IsNewScope);
1778 /// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only
1779 /// annotates C++ scope specifiers and template-ids. This returns
1780 /// true if there was an error that could not be recovered from.
1782 /// Note that this routine emits an error if you call it with ::new or ::delete
1783 /// as the current tokens, so only call it in contexts where these are invalid.
1784 bool Parser::TryAnnotateCXXScopeToken(bool EnteringContext) {
1785 assert(getLangOpts().CPlusPlus &&
1786 "Call sites of this function should be guarded by checking for C++");
1787 assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) ||
1788 (Tok.is(tok::annot_template_id) && NextToken().is(tok::coloncolon)) ||
1789 Tok.is(tok::kw_decltype) || Tok.is(tok::kw___super)) &&
1790 "Cannot be a type or scope token!");
1793 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext))
1798 AnnotateScopeToken(SS, true);
1802 bool Parser::isTokenEqualOrEqualTypo() {
1803 tok::TokenKind Kind = Tok.getKind();
1807 case tok::ampequal: // &=
1808 case tok::starequal: // *=
1809 case tok::plusequal: // +=
1810 case tok::minusequal: // -=
1811 case tok::exclaimequal: // !=
1812 case tok::slashequal: // /=
1813 case tok::percentequal: // %=
1814 case tok::lessequal: // <=
1815 case tok::lesslessequal: // <<=
1816 case tok::greaterequal: // >=
1817 case tok::greatergreaterequal: // >>=
1818 case tok::caretequal: // ^=
1819 case tok::pipeequal: // |=
1820 case tok::equalequal: // ==
1821 Diag(Tok, diag::err_invalid_token_after_declarator_suggest_equal)
1823 << FixItHint::CreateReplacement(SourceRange(Tok.getLocation()), "=");
1829 SourceLocation Parser::handleUnexpectedCodeCompletionToken() {
1830 assert(Tok.is(tok::code_completion));
1831 PrevTokLocation = Tok.getLocation();
1833 for (Scope *S = getCurScope(); S; S = S->getParent()) {
1834 if (S->getFlags() & Scope::FnScope) {
1835 Actions.CodeCompleteOrdinaryName(getCurScope(),
1836 Sema::PCC_RecoveryInFunction);
1838 return PrevTokLocation;
1841 if (S->getFlags() & Scope::ClassScope) {
1842 Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Class);
1844 return PrevTokLocation;
1848 Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Namespace);
1850 return PrevTokLocation;
1853 // Code-completion pass-through functions
1855 void Parser::CodeCompleteDirective(bool InConditional) {
1856 Actions.CodeCompletePreprocessorDirective(InConditional);
1859 void Parser::CodeCompleteInConditionalExclusion() {
1860 Actions.CodeCompleteInPreprocessorConditionalExclusion(getCurScope());
1863 void Parser::CodeCompleteMacroName(bool IsDefinition) {
1864 Actions.CodeCompletePreprocessorMacroName(IsDefinition);
1867 void Parser::CodeCompletePreprocessorExpression() {
1868 Actions.CodeCompletePreprocessorExpression();
1871 void Parser::CodeCompleteMacroArgument(IdentifierInfo *Macro,
1872 MacroInfo *MacroInfo,
1873 unsigned ArgumentIndex) {
1874 Actions.CodeCompletePreprocessorMacroArgument(getCurScope(), Macro, MacroInfo,
1878 void Parser::CodeCompleteNaturalLanguage() {
1879 Actions.CodeCompleteNaturalLanguage();
1882 bool Parser::ParseMicrosoftIfExistsCondition(IfExistsCondition& Result) {
1883 assert((Tok.is(tok::kw___if_exists) || Tok.is(tok::kw___if_not_exists)) &&
1884 "Expected '__if_exists' or '__if_not_exists'");
1885 Result.IsIfExists = Tok.is(tok::kw___if_exists);
1886 Result.KeywordLoc = ConsumeToken();
1888 BalancedDelimiterTracker T(*this, tok::l_paren);
1889 if (T.consumeOpen()) {
1890 Diag(Tok, diag::err_expected_lparen_after)
1891 << (Result.IsIfExists? "__if_exists" : "__if_not_exists");
1895 // Parse nested-name-specifier.
1896 if (getLangOpts().CPlusPlus)
1897 ParseOptionalCXXScopeSpecifier(Result.SS, ParsedType(),
1898 /*EnteringContext=*/false);
1900 // Check nested-name specifier.
1901 if (Result.SS.isInvalid()) {
1906 // Parse the unqualified-id.
1907 SourceLocation TemplateKWLoc; // FIXME: parsed, but unused.
1908 if (ParseUnqualifiedId(Result.SS, false, true, true, ParsedType(),
1909 TemplateKWLoc, Result.Name)) {
1914 if (T.consumeClose())
1917 // Check if the symbol exists.
1918 switch (Actions.CheckMicrosoftIfExistsSymbol(getCurScope(), Result.KeywordLoc,
1919 Result.IsIfExists, Result.SS,
1921 case Sema::IER_Exists:
1922 Result.Behavior = Result.IsIfExists ? IEB_Parse : IEB_Skip;
1925 case Sema::IER_DoesNotExist:
1926 Result.Behavior = !Result.IsIfExists ? IEB_Parse : IEB_Skip;
1929 case Sema::IER_Dependent:
1930 Result.Behavior = IEB_Dependent;
1933 case Sema::IER_Error:
1940 void Parser::ParseMicrosoftIfExistsExternalDeclaration() {
1941 IfExistsCondition Result;
1942 if (ParseMicrosoftIfExistsCondition(Result))
1945 BalancedDelimiterTracker Braces(*this, tok::l_brace);
1946 if (Braces.consumeOpen()) {
1947 Diag(Tok, diag::err_expected) << tok::l_brace;
1951 switch (Result.Behavior) {
1953 // Parse declarations below.
1957 llvm_unreachable("Cannot have a dependent external declaration");
1964 // Parse the declarations.
1965 // FIXME: Support module import within __if_exists?
1966 while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
1967 ParsedAttributesWithRange attrs(AttrFactory);
1968 MaybeParseCXX11Attributes(attrs);
1969 MaybeParseMicrosoftAttributes(attrs);
1970 DeclGroupPtrTy Result = ParseExternalDeclaration(attrs);
1971 if (Result && !getCurScope()->getParent())
1972 Actions.getASTConsumer().HandleTopLevelDecl(Result.get());
1974 Braces.consumeClose();
1977 Parser::DeclGroupPtrTy Parser::ParseModuleImport(SourceLocation AtLoc) {
1978 assert(Tok.isObjCAtKeyword(tok::objc_import) &&
1979 "Improper start to module import");
1980 SourceLocation ImportLoc = ConsumeToken();
1982 SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 2> Path;
1984 // Parse the module path.
1986 if (!Tok.is(tok::identifier)) {
1987 if (Tok.is(tok::code_completion)) {
1988 Actions.CodeCompleteModuleImport(ImportLoc, Path);
1990 return DeclGroupPtrTy();
1993 Diag(Tok, diag::err_module_expected_ident);
1994 SkipUntil(tok::semi);
1995 return DeclGroupPtrTy();
1998 // Record this part of the module path.
1999 Path.push_back(std::make_pair(Tok.getIdentifierInfo(), Tok.getLocation()));
2002 if (Tok.is(tok::period)) {
2010 if (PP.hadModuleLoaderFatalFailure()) {
2011 // With a fatal failure in the module loader, we abort parsing.
2013 return DeclGroupPtrTy();
2016 DeclResult Import = Actions.ActOnModuleImport(AtLoc, ImportLoc, Path);
2017 ExpectAndConsumeSemi(diag::err_module_expected_semi);
2018 if (Import.isInvalid())
2019 return DeclGroupPtrTy();
2021 return Actions.ConvertDeclToDeclGroup(Import.get());
2024 /// \brief Try recover parser when module annotation appears where it must not
2026 /// \returns false if the recover was successful and parsing may be continued, or
2027 /// true if parser must bail out to top level and handle the token there.
2028 bool Parser::parseMisplacedModuleImport() {
2030 switch (Tok.getKind()) {
2031 case tok::annot_module_end:
2032 // Inform caller that recovery failed, the error must be handled at upper
2035 case tok::annot_module_begin:
2036 Actions.diagnoseMisplacedModuleImport(reinterpret_cast<Module *>(
2037 Tok.getAnnotationValue()), Tok.getLocation());
2039 case tok::annot_module_include:
2040 // Module import found where it should not be, for instance, inside a
2041 // namespace. Recover by importing the module.
2042 Actions.ActOnModuleInclude(Tok.getLocation(),
2043 reinterpret_cast<Module *>(
2044 Tok.getAnnotationValue()));
2046 // If there is another module import, process it.
2055 bool BalancedDelimiterTracker::diagnoseOverflow() {
2056 P.Diag(P.Tok, diag::err_bracket_depth_exceeded)
2057 << P.getLangOpts().BracketDepth;
2058 P.Diag(P.Tok, diag::note_bracket_depth);
2063 bool BalancedDelimiterTracker::expectAndConsume(unsigned DiagID,
2065 tok::TokenKind SkipToTok) {
2066 LOpen = P.Tok.getLocation();
2067 if (P.ExpectAndConsume(Kind, DiagID, Msg)) {
2068 if (SkipToTok != tok::unknown)
2069 P.SkipUntil(SkipToTok, Parser::StopAtSemi);
2073 if (getDepth() < MaxDepth)
2076 return diagnoseOverflow();
2079 bool BalancedDelimiterTracker::diagnoseMissingClose() {
2080 assert(!P.Tok.is(Close) && "Should have consumed closing delimiter");
2082 if (P.Tok.is(tok::annot_module_end))
2083 P.Diag(P.Tok, diag::err_missing_before_module_end) << Close;
2085 P.Diag(P.Tok, diag::err_expected) << Close;
2086 P.Diag(LOpen, diag::note_matching) << Kind;
2088 // If we're not already at some kind of closing bracket, skip to our closing
2090 if (P.Tok.isNot(tok::r_paren) && P.Tok.isNot(tok::r_brace) &&
2091 P.Tok.isNot(tok::r_square) &&
2092 P.SkipUntil(Close, FinalToken,
2093 Parser::StopAtSemi | Parser::StopBeforeMatch) &&
2095 LClose = P.ConsumeAnyToken();
2099 void BalancedDelimiterTracker::skipToEnd() {
2100 P.SkipUntil(Close, Parser::StopBeforeMatch);