1 //===--- ParseExprCXX.cpp - C++ Expression Parsing ------------------------===//
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 Expression parsing implementation for C++.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Parse/ParseDiagnostic.h"
15 #include "clang/Parse/Parser.h"
16 #include "RAIIObjectsForParser.h"
17 #include "clang/Sema/DeclSpec.h"
18 #include "clang/Sema/Scope.h"
19 #include "clang/Sema/ParsedTemplate.h"
20 #include "llvm/Support/ErrorHandling.h"
22 using namespace clang;
24 static int SelectDigraphErrorMessage(tok::TokenKind Kind) {
26 case tok::kw_template: return 0;
27 case tok::kw_const_cast: return 1;
28 case tok::kw_dynamic_cast: return 2;
29 case tok::kw_reinterpret_cast: return 3;
30 case tok::kw_static_cast: return 4;
32 llvm_unreachable("Unknown type for digraph error message.");
36 // Are the two tokens adjacent in the same source file?
37 static bool AreTokensAdjacent(Preprocessor &PP, Token &First, Token &Second) {
38 SourceManager &SM = PP.getSourceManager();
39 SourceLocation FirstLoc = SM.getSpellingLoc(First.getLocation());
40 SourceLocation FirstEnd = FirstLoc.getLocWithOffset(First.getLength());
41 return FirstEnd == SM.getSpellingLoc(Second.getLocation());
44 // Suggest fixit for "<::" after a cast.
45 static void FixDigraph(Parser &P, Preprocessor &PP, Token &DigraphToken,
46 Token &ColonToken, tok::TokenKind Kind, bool AtDigraph) {
47 // Pull '<:' and ':' off token stream.
53 Range.setBegin(DigraphToken.getLocation());
54 Range.setEnd(ColonToken.getLocation());
55 P.Diag(DigraphToken.getLocation(), diag::err_missing_whitespace_digraph)
56 << SelectDigraphErrorMessage(Kind)
57 << FixItHint::CreateReplacement(Range, "< ::");
59 // Update token information to reflect their change in token type.
60 ColonToken.setKind(tok::coloncolon);
61 ColonToken.setLocation(ColonToken.getLocation().getLocWithOffset(-1));
62 ColonToken.setLength(2);
63 DigraphToken.setKind(tok::less);
64 DigraphToken.setLength(1);
66 // Push new tokens back to token stream.
67 PP.EnterToken(ColonToken);
69 PP.EnterToken(DigraphToken);
72 // Check for '<::' which should be '< ::' instead of '[:' when following
74 void Parser::CheckForTemplateAndDigraph(Token &Next, ParsedType ObjectType,
76 IdentifierInfo &II, CXXScopeSpec &SS) {
77 if (!Next.is(tok::l_square) || Next.getLength() != 2)
80 Token SecondToken = GetLookAheadToken(2);
81 if (!SecondToken.is(tok::colon) || !AreTokensAdjacent(PP, Next, SecondToken))
85 UnqualifiedId TemplateName;
86 TemplateName.setIdentifier(&II, Tok.getLocation());
87 bool MemberOfUnknownSpecialization;
88 if (!Actions.isTemplateName(getCurScope(), SS, /*hasTemplateKeyword=*/false,
89 TemplateName, ObjectType, EnteringContext,
90 Template, MemberOfUnknownSpecialization))
93 FixDigraph(*this, PP, Next, SecondToken, tok::kw_template,
97 /// \brief Parse global scope or nested-name-specifier if present.
99 /// Parses a C++ global scope specifier ('::') or nested-name-specifier (which
100 /// may be preceded by '::'). Note that this routine will not parse ::new or
101 /// ::delete; it will just leave them in the token stream.
103 /// '::'[opt] nested-name-specifier
106 /// nested-name-specifier:
108 /// namespace-name '::'
109 /// nested-name-specifier identifier '::'
110 /// nested-name-specifier 'template'[opt] simple-template-id '::'
113 /// \param SS the scope specifier that will be set to the parsed
114 /// nested-name-specifier (or empty)
116 /// \param ObjectType if this nested-name-specifier is being parsed following
117 /// the "." or "->" of a member access expression, this parameter provides the
118 /// type of the object whose members are being accessed.
120 /// \param EnteringContext whether we will be entering into the context of
121 /// the nested-name-specifier after parsing it.
123 /// \param MayBePseudoDestructor When non-NULL, points to a flag that
124 /// indicates whether this nested-name-specifier may be part of a
125 /// pseudo-destructor name. In this case, the flag will be set false
126 /// if we don't actually end up parsing a destructor name. Moreorover,
127 /// if we do end up determining that we are parsing a destructor name,
128 /// the last component of the nested-name-specifier is not parsed as
129 /// part of the scope specifier.
131 /// member access expression, e.g., the \p T:: in \p p->T::m.
133 /// \returns true if there was an error parsing a scope specifier
134 bool Parser::ParseOptionalCXXScopeSpecifier(CXXScopeSpec &SS,
135 ParsedType ObjectType,
136 bool EnteringContext,
137 bool *MayBePseudoDestructor,
139 assert(getLang().CPlusPlus &&
140 "Call sites of this function should be guarded by checking for C++");
142 if (Tok.is(tok::annot_cxxscope)) {
143 Actions.RestoreNestedNameSpecifierAnnotation(Tok.getAnnotationValue(),
144 Tok.getAnnotationRange(),
150 bool HasScopeSpecifier = false;
152 if (Tok.is(tok::coloncolon)) {
153 // ::new and ::delete aren't nested-name-specifiers.
154 tok::TokenKind NextKind = NextToken().getKind();
155 if (NextKind == tok::kw_new || NextKind == tok::kw_delete)
158 // '::' - Global scope qualifier.
159 if (Actions.ActOnCXXGlobalScopeSpecifier(getCurScope(), ConsumeToken(), SS))
162 HasScopeSpecifier = true;
165 bool CheckForDestructor = false;
166 if (MayBePseudoDestructor && *MayBePseudoDestructor) {
167 CheckForDestructor = true;
168 *MayBePseudoDestructor = false;
172 if (HasScopeSpecifier) {
173 // C++ [basic.lookup.classref]p5:
174 // If the qualified-id has the form
176 // ::class-name-or-namespace-name::...
178 // the class-name-or-namespace-name is looked up in global scope as a
179 // class-name or namespace-name.
181 // To implement this, we clear out the object type as soon as we've
182 // seen a leading '::' or part of a nested-name-specifier.
183 ObjectType = ParsedType();
185 if (Tok.is(tok::code_completion)) {
186 // Code completion for a nested-name-specifier, where the code
187 // code completion token follows the '::'.
188 Actions.CodeCompleteQualifiedId(getCurScope(), SS, EnteringContext);
189 // Include code completion token into the range of the scope otherwise
190 // when we try to annotate the scope tokens the dangling code completion
191 // token will cause assertion in
192 // Preprocessor::AnnotatePreviousCachedTokens.
193 SS.setEndLoc(Tok.getLocation());
199 // nested-name-specifier:
200 // nested-name-specifier 'template'[opt] simple-template-id '::'
202 // Parse the optional 'template' keyword, then make sure we have
203 // 'identifier <' after it.
204 if (Tok.is(tok::kw_template)) {
205 // If we don't have a scope specifier or an object type, this isn't a
206 // nested-name-specifier, since they aren't allowed to start with
208 if (!HasScopeSpecifier && !ObjectType)
211 TentativeParsingAction TPA(*this);
212 SourceLocation TemplateKWLoc = ConsumeToken();
214 UnqualifiedId TemplateName;
215 if (Tok.is(tok::identifier)) {
216 // Consume the identifier.
217 TemplateName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
219 } else if (Tok.is(tok::kw_operator)) {
220 if (ParseUnqualifiedIdOperator(SS, EnteringContext, ObjectType,
226 if (TemplateName.getKind() != UnqualifiedId::IK_OperatorFunctionId &&
227 TemplateName.getKind() != UnqualifiedId::IK_LiteralOperatorId) {
228 Diag(TemplateName.getSourceRange().getBegin(),
229 diag::err_id_after_template_in_nested_name_spec)
230 << TemplateName.getSourceRange();
239 // If the next token is not '<', we have a qualified-id that refers
240 // to a template name, such as T::template apply, but is not a
242 if (Tok.isNot(tok::less)) {
247 // Commit to parsing the template-id.
250 if (TemplateNameKind TNK = Actions.ActOnDependentTemplateName(getCurScope(),
257 if (AnnotateTemplateIdToken(Template, TNK, SS, TemplateName,
258 TemplateKWLoc, false))
266 if (Tok.is(tok::annot_template_id) && NextToken().is(tok::coloncolon)) {
269 // simple-template-id '::'
271 // So we need to check whether the simple-template-id is of the
272 // right kind (it should name a type or be dependent), and then
273 // convert it into a type within the nested-name-specifier.
274 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
275 if (CheckForDestructor && GetLookAheadToken(2).is(tok::tilde)) {
276 *MayBePseudoDestructor = true;
280 // Consume the template-id token.
283 assert(Tok.is(tok::coloncolon) && "NextToken() not working properly!");
284 SourceLocation CCLoc = ConsumeToken();
286 if (!HasScopeSpecifier)
287 HasScopeSpecifier = true;
289 ASTTemplateArgsPtr TemplateArgsPtr(Actions,
290 TemplateId->getTemplateArgs(),
291 TemplateId->NumArgs);
293 if (Actions.ActOnCXXNestedNameSpecifier(getCurScope(),
294 /*FIXME:*/SourceLocation(),
296 TemplateId->Template,
297 TemplateId->TemplateNameLoc,
298 TemplateId->LAngleLoc,
300 TemplateId->RAngleLoc,
303 SourceLocation StartLoc
304 = SS.getBeginLoc().isValid()? SS.getBeginLoc()
305 : TemplateId->TemplateNameLoc;
306 SS.SetInvalid(SourceRange(StartLoc, CCLoc));
313 // The rest of the nested-name-specifier possibilities start with
315 if (Tok.isNot(tok::identifier))
318 IdentifierInfo &II = *Tok.getIdentifierInfo();
320 // nested-name-specifier:
322 // namespace-name '::'
323 // nested-name-specifier identifier '::'
324 Token Next = NextToken();
326 // If we get foo:bar, this is almost certainly a typo for foo::bar. Recover
327 // and emit a fixit hint for it.
328 if (Next.is(tok::colon) && !ColonIsSacred) {
329 if (Actions.IsInvalidUnlessNestedName(getCurScope(), SS, II,
331 Next.getLocation(), ObjectType,
333 // If the token after the colon isn't an identifier, it's still an
334 // error, but they probably meant something else strange so don't
335 // recover like this.
336 PP.LookAhead(1).is(tok::identifier)) {
337 Diag(Next, diag::err_unexected_colon_in_nested_name_spec)
338 << FixItHint::CreateReplacement(Next.getLocation(), "::");
340 // Recover as if the user wrote '::'.
341 Next.setKind(tok::coloncolon);
345 if (Next.is(tok::coloncolon)) {
346 if (CheckForDestructor && GetLookAheadToken(2).is(tok::tilde) &&
347 !Actions.isNonTypeNestedNameSpecifier(getCurScope(), SS, Tok.getLocation(),
349 *MayBePseudoDestructor = true;
353 // We have an identifier followed by a '::'. Lookup this name
354 // as the name in a nested-name-specifier.
355 SourceLocation IdLoc = ConsumeToken();
356 assert((Tok.is(tok::coloncolon) || Tok.is(tok::colon)) &&
357 "NextToken() not working properly!");
358 SourceLocation CCLoc = ConsumeToken();
360 HasScopeSpecifier = true;
361 if (Actions.ActOnCXXNestedNameSpecifier(getCurScope(), II, IdLoc, CCLoc,
362 ObjectType, EnteringContext, SS))
363 SS.SetInvalid(SourceRange(IdLoc, CCLoc));
368 CheckForTemplateAndDigraph(Next, ObjectType, EnteringContext, II, SS);
370 // nested-name-specifier:
372 if (Next.is(tok::less)) {
374 UnqualifiedId TemplateName;
375 TemplateName.setIdentifier(&II, Tok.getLocation());
376 bool MemberOfUnknownSpecialization;
377 if (TemplateNameKind TNK = Actions.isTemplateName(getCurScope(), SS,
378 /*hasTemplateKeyword=*/false,
383 MemberOfUnknownSpecialization)) {
384 // We have found a template name, so annotate this this token
385 // with a template-id annotation. We do not permit the
386 // template-id to be translated into a type annotation,
387 // because some clients (e.g., the parsing of class template
388 // specializations) still want to see the original template-id
391 if (AnnotateTemplateIdToken(Template, TNK, SS, TemplateName,
392 SourceLocation(), false))
397 if (MemberOfUnknownSpecialization && (ObjectType || SS.isSet()) &&
398 (IsTypename || IsTemplateArgumentList(1))) {
399 // We have something like t::getAs<T>, where getAs is a
400 // member of an unknown specialization. However, this will only
401 // parse correctly as a template, so suggest the keyword 'template'
402 // before 'getAs' and treat this as a dependent template name.
403 unsigned DiagID = diag::err_missing_dependent_template_keyword;
404 if (getLang().MicrosoftExt)
405 DiagID = diag::warn_missing_dependent_template_keyword;
407 Diag(Tok.getLocation(), DiagID)
409 << FixItHint::CreateInsertion(Tok.getLocation(), "template ");
411 if (TemplateNameKind TNK
412 = Actions.ActOnDependentTemplateName(getCurScope(),
413 Tok.getLocation(), SS,
414 TemplateName, ObjectType,
415 EnteringContext, Template)) {
416 // Consume the identifier.
418 if (AnnotateTemplateIdToken(Template, TNK, SS, TemplateName,
419 SourceLocation(), false))
429 // We don't have any tokens that form the beginning of a
430 // nested-name-specifier, so we're done.
434 // Even if we didn't see any pieces of a nested-name-specifier, we
435 // still check whether there is a tilde in this position, which
436 // indicates a potential pseudo-destructor.
437 if (CheckForDestructor && Tok.is(tok::tilde))
438 *MayBePseudoDestructor = true;
443 /// ParseCXXIdExpression - Handle id-expression.
450 /// '::'[opt] nested-name-specifier 'template'[opt] unqualified-id
452 /// '::' operator-function-id
455 /// NOTE: The standard specifies that, for qualified-id, the parser does not
458 /// '::' conversion-function-id
459 /// '::' '~' class-name
461 /// This may cause a slight inconsistency on diagnostics:
466 /// :: A :: ~ C(); // Some Sema error about using destructor with a
468 /// :: ~ C(); // Some Parser error like 'unexpected ~'.
471 /// We simplify the parser a bit and make it work like:
474 /// '::'[opt] nested-name-specifier 'template'[opt] unqualified-id
475 /// '::' unqualified-id
477 /// That way Sema can handle and report similar errors for namespaces and the
480 /// The isAddressOfOperand parameter indicates that this id-expression is a
481 /// direct operand of the address-of operator. This is, besides member contexts,
482 /// the only place where a qualified-id naming a non-static class member may
485 ExprResult Parser::ParseCXXIdExpression(bool isAddressOfOperand) {
487 // '::'[opt] nested-name-specifier 'template'[opt] unqualified-id
488 // '::' unqualified-id
491 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), false);
494 if (ParseUnqualifiedId(SS,
495 /*EnteringContext=*/false,
496 /*AllowDestructorName=*/false,
497 /*AllowConstructorName=*/false,
498 /*ObjectType=*/ ParsedType(),
502 // This is only the direct operand of an & operator if it is not
503 // followed by a postfix-expression suffix.
504 if (isAddressOfOperand && isPostfixExpressionSuffixStart())
505 isAddressOfOperand = false;
507 return Actions.ActOnIdExpression(getCurScope(), SS, Name, Tok.is(tok::l_paren),
512 /// ParseLambdaExpression - Parse a C++0x lambda expression.
514 /// lambda-expression:
515 /// lambda-introducer lambda-declarator[opt] compound-statement
517 /// lambda-introducer:
518 /// '[' lambda-capture[opt] ']'
523 /// capture-default ',' capture-list
531 /// capture-list ',' capture
538 /// lambda-declarator:
539 /// '(' parameter-declaration-clause ')' attribute-specifier[opt]
540 /// 'mutable'[opt] exception-specification[opt]
541 /// trailing-return-type[opt]
543 ExprResult Parser::ParseLambdaExpression() {
544 // Parse lambda-introducer.
545 LambdaIntroducer Intro;
547 llvm::Optional<unsigned> DiagID(ParseLambdaIntroducer(Intro));
549 Diag(Tok, DiagID.getValue());
550 SkipUntil(tok::r_square);
553 return ParseLambdaExpressionAfterIntroducer(Intro);
556 /// TryParseLambdaExpression - Use lookahead and potentially tentative
557 /// parsing to determine if we are looking at a C++0x lambda expression, and parse
560 /// If we are not looking at a lambda expression, returns ExprError().
561 ExprResult Parser::TryParseLambdaExpression() {
562 assert(getLang().CPlusPlus0x
563 && Tok.is(tok::l_square)
564 && "Not at the start of a possible lambda expression.");
566 const Token Next = NextToken(), After = GetLookAheadToken(2);
568 // If lookahead indicates this is a lambda...
569 if (Next.is(tok::r_square) || // []
570 Next.is(tok::equal) || // [=
571 (Next.is(tok::amp) && // [&] or [&,
572 (After.is(tok::r_square) ||
573 After.is(tok::comma))) ||
574 (Next.is(tok::identifier) && // [identifier]
575 After.is(tok::r_square))) {
576 return ParseLambdaExpression();
579 // If lookahead indicates this is an Objective-C message...
580 if (Next.is(tok::identifier) && After.is(tok::identifier)) {
584 LambdaIntroducer Intro;
585 if (TryParseLambdaIntroducer(Intro))
587 return ParseLambdaExpressionAfterIntroducer(Intro);
590 /// ParseLambdaExpression - Parse a lambda introducer.
592 /// Returns a DiagnosticID if it hit something unexpected.
593 llvm::Optional<unsigned> Parser::ParseLambdaIntroducer(LambdaIntroducer &Intro) {
594 typedef llvm::Optional<unsigned> DiagResult;
596 assert(Tok.is(tok::l_square) && "Lambda expressions begin with '['.");
597 BalancedDelimiterTracker T(*this, tok::l_square);
600 Intro.Range.setBegin(T.getOpenLocation());
604 // Parse capture-default.
605 if (Tok.is(tok::amp) &&
606 (NextToken().is(tok::comma) || NextToken().is(tok::r_square))) {
607 Intro.Default = LCD_ByRef;
610 } else if (Tok.is(tok::equal)) {
611 Intro.Default = LCD_ByCopy;
616 while (Tok.isNot(tok::r_square)) {
618 if (Tok.isNot(tok::comma))
619 return DiagResult(diag::err_expected_comma_or_rsquare);
626 LambdaCaptureKind Kind = LCK_ByCopy;
628 IdentifierInfo* Id = 0;
630 if (Tok.is(tok::kw_this)) {
632 Loc = ConsumeToken();
634 if (Tok.is(tok::amp)) {
639 if (Tok.is(tok::identifier)) {
640 Id = Tok.getIdentifierInfo();
641 Loc = ConsumeToken();
642 } else if (Tok.is(tok::kw_this)) {
643 // FIXME: If we want to suggest a fixit here, will need to return more
644 // than just DiagnosticID. Perhaps full DiagnosticBuilder that can be
645 // Clear()ed to prevent emission in case of tentative parsing?
646 return DiagResult(diag::err_this_captured_by_reference);
648 return DiagResult(diag::err_expected_capture);
652 Intro.addCapture(Kind, Loc, Id);
656 Intro.Range.setEnd(T.getCloseLocation());
661 /// TryParseLambdaExpression - Tentatively parse a lambda introducer.
663 /// Returns true if it hit something unexpected.
664 bool Parser::TryParseLambdaIntroducer(LambdaIntroducer &Intro) {
665 TentativeParsingAction PA(*this);
667 llvm::Optional<unsigned> DiagID(ParseLambdaIntroducer(Intro));
678 /// ParseLambdaExpressionAfterIntroducer - Parse the rest of a lambda
680 ExprResult Parser::ParseLambdaExpressionAfterIntroducer(
681 LambdaIntroducer &Intro) {
682 // Parse lambda-declarator[opt].
683 DeclSpec DS(AttrFactory);
684 Declarator D(DS, Declarator::PrototypeContext);
686 if (Tok.is(tok::l_paren)) {
687 ParseScope PrototypeScope(this,
688 Scope::FunctionPrototypeScope |
691 SourceLocation DeclLoc, DeclEndLoc;
692 BalancedDelimiterTracker T(*this, tok::l_paren);
694 DeclLoc = T.getOpenLocation();
696 // Parse parameter-declaration-clause.
697 ParsedAttributes Attr(AttrFactory);
698 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo;
699 SourceLocation EllipsisLoc;
701 if (Tok.isNot(tok::r_paren))
702 ParseParameterDeclarationClause(D, Attr, ParamInfo, EllipsisLoc);
705 DeclEndLoc = T.getCloseLocation();
707 // Parse 'mutable'[opt].
708 SourceLocation MutableLoc;
709 if (Tok.is(tok::kw_mutable)) {
710 MutableLoc = ConsumeToken();
711 DeclEndLoc = MutableLoc;
714 // Parse exception-specification[opt].
715 ExceptionSpecificationType ESpecType = EST_None;
716 SourceRange ESpecRange;
717 llvm::SmallVector<ParsedType, 2> DynamicExceptions;
718 llvm::SmallVector<SourceRange, 2> DynamicExceptionRanges;
719 ExprResult NoexceptExpr;
720 ESpecType = MaybeParseExceptionSpecification(ESpecRange,
722 DynamicExceptionRanges,
725 if (ESpecType != EST_None)
726 DeclEndLoc = ESpecRange.getEnd();
728 // Parse attribute-specifier[opt].
729 MaybeParseCXX0XAttributes(Attr, &DeclEndLoc);
731 // Parse trailing-return-type[opt].
732 ParsedType TrailingReturnType;
733 if (Tok.is(tok::arrow)) {
735 TrailingReturnType = ParseTrailingReturnType(Range).get();
736 if (Range.getEnd().isValid())
737 DeclEndLoc = Range.getEnd();
740 PrototypeScope.Exit();
742 D.AddTypeInfo(DeclaratorChunk::getFunction(/*hasProto=*/true,
743 /*isVariadic=*/EllipsisLoc.isValid(),
745 ParamInfo.data(), ParamInfo.size(),
746 DS.getTypeQualifiers(),
747 /*RefQualifierIsLValueRef=*/true,
748 /*RefQualifierLoc=*/SourceLocation(),
750 ESpecType, ESpecRange.getBegin(),
751 DynamicExceptions.data(),
752 DynamicExceptionRanges.data(),
753 DynamicExceptions.size(),
754 NoexceptExpr.isUsable() ?
755 NoexceptExpr.get() : 0,
756 DeclLoc, DeclEndLoc, D,
761 // Parse compound-statement.
762 if (Tok.is(tok::l_brace)) {
763 // FIXME: Rename BlockScope -> ClosureScope if we decide to continue using
765 ParseScope BodyScope(this, Scope::BlockScope | Scope::FnScope |
766 Scope::BreakScope | Scope::ContinueScope |
769 StmtResult Stmt(ParseCompoundStatementBody());
773 Diag(Tok, diag::err_expected_lambda_body);
779 /// ParseCXXCasts - This handles the various ways to cast expressions to another
782 /// postfix-expression: [C++ 5.2p1]
783 /// 'dynamic_cast' '<' type-name '>' '(' expression ')'
784 /// 'static_cast' '<' type-name '>' '(' expression ')'
785 /// 'reinterpret_cast' '<' type-name '>' '(' expression ')'
786 /// 'const_cast' '<' type-name '>' '(' expression ')'
788 ExprResult Parser::ParseCXXCasts() {
789 tok::TokenKind Kind = Tok.getKind();
790 const char *CastName = 0; // For error messages
793 default: llvm_unreachable("Unknown C++ cast!");
794 case tok::kw_const_cast: CastName = "const_cast"; break;
795 case tok::kw_dynamic_cast: CastName = "dynamic_cast"; break;
796 case tok::kw_reinterpret_cast: CastName = "reinterpret_cast"; break;
797 case tok::kw_static_cast: CastName = "static_cast"; break;
800 SourceLocation OpLoc = ConsumeToken();
801 SourceLocation LAngleBracketLoc = Tok.getLocation();
803 // Check for "<::" which is parsed as "[:". If found, fix token stream,
804 // diagnose error, suggest fix, and recover parsing.
805 Token Next = NextToken();
806 if (Tok.is(tok::l_square) && Tok.getLength() == 2 && Next.is(tok::colon) &&
807 AreTokensAdjacent(PP, Tok, Next))
808 FixDigraph(*this, PP, Tok, Next, Kind, /*AtDigraph*/true);
810 if (ExpectAndConsume(tok::less, diag::err_expected_less_after, CastName))
813 // Parse the common declaration-specifiers piece.
814 DeclSpec DS(AttrFactory);
815 ParseSpecifierQualifierList(DS);
817 // Parse the abstract-declarator, if present.
818 Declarator DeclaratorInfo(DS, Declarator::TypeNameContext);
819 ParseDeclarator(DeclaratorInfo);
821 SourceLocation RAngleBracketLoc = Tok.getLocation();
823 if (ExpectAndConsume(tok::greater, diag::err_expected_greater))
824 return ExprError(Diag(LAngleBracketLoc, diag::note_matching) << "<");
826 SourceLocation LParenLoc, RParenLoc;
827 BalancedDelimiterTracker T(*this, tok::l_paren);
829 if (T.expectAndConsume(diag::err_expected_lparen_after, CastName))
832 ExprResult Result = ParseExpression();
837 if (!Result.isInvalid() && !DeclaratorInfo.isInvalidType())
838 Result = Actions.ActOnCXXNamedCast(OpLoc, Kind,
839 LAngleBracketLoc, DeclaratorInfo,
841 T.getOpenLocation(), Result.take(),
842 T.getCloseLocation());
847 /// ParseCXXTypeid - This handles the C++ typeid expression.
849 /// postfix-expression: [C++ 5.2p1]
850 /// 'typeid' '(' expression ')'
851 /// 'typeid' '(' type-id ')'
853 ExprResult Parser::ParseCXXTypeid() {
854 assert(Tok.is(tok::kw_typeid) && "Not 'typeid'!");
856 SourceLocation OpLoc = ConsumeToken();
857 SourceLocation LParenLoc, RParenLoc;
858 BalancedDelimiterTracker T(*this, tok::l_paren);
860 // typeid expressions are always parenthesized.
861 if (T.expectAndConsume(diag::err_expected_lparen_after, "typeid"))
863 LParenLoc = T.getOpenLocation();
867 if (isTypeIdInParens()) {
868 TypeResult Ty = ParseTypeName();
872 RParenLoc = T.getCloseLocation();
873 if (Ty.isInvalid() || RParenLoc.isInvalid())
876 Result = Actions.ActOnCXXTypeid(OpLoc, LParenLoc, /*isType=*/true,
877 Ty.get().getAsOpaquePtr(), RParenLoc);
879 // C++0x [expr.typeid]p3:
880 // When typeid is applied to an expression other than an lvalue of a
881 // polymorphic class type [...] The expression is an unevaluated
882 // operand (Clause 5).
884 // Note that we can't tell whether the expression is an lvalue of a
885 // polymorphic class type until after we've parsed the expression, so
886 // we the expression is potentially potentially evaluated.
887 EnterExpressionEvaluationContext Unevaluated(Actions,
888 Sema::PotentiallyPotentiallyEvaluated);
889 Result = ParseExpression();
892 if (Result.isInvalid())
893 SkipUntil(tok::r_paren);
896 RParenLoc = T.getCloseLocation();
897 if (RParenLoc.isInvalid())
900 Result = Actions.ActOnCXXTypeid(OpLoc, LParenLoc, /*isType=*/false,
901 Result.release(), RParenLoc);
908 /// ParseCXXUuidof - This handles the Microsoft C++ __uuidof expression.
910 /// '__uuidof' '(' expression ')'
911 /// '__uuidof' '(' type-id ')'
913 ExprResult Parser::ParseCXXUuidof() {
914 assert(Tok.is(tok::kw___uuidof) && "Not '__uuidof'!");
916 SourceLocation OpLoc = ConsumeToken();
917 BalancedDelimiterTracker T(*this, tok::l_paren);
919 // __uuidof expressions are always parenthesized.
920 if (T.expectAndConsume(diag::err_expected_lparen_after, "__uuidof"))
925 if (isTypeIdInParens()) {
926 TypeResult Ty = ParseTypeName();
934 Result = Actions.ActOnCXXUuidof(OpLoc, T.getOpenLocation(), /*isType=*/true,
935 Ty.get().getAsOpaquePtr(),
936 T.getCloseLocation());
938 EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated);
939 Result = ParseExpression();
942 if (Result.isInvalid())
943 SkipUntil(tok::r_paren);
947 Result = Actions.ActOnCXXUuidof(OpLoc, T.getOpenLocation(),
949 Result.release(), T.getCloseLocation());
956 /// \brief Parse a C++ pseudo-destructor expression after the base,
957 /// . or -> operator, and nested-name-specifier have already been
960 /// postfix-expression: [C++ 5.2]
961 /// postfix-expression . pseudo-destructor-name
962 /// postfix-expression -> pseudo-destructor-name
964 /// pseudo-destructor-name:
965 /// ::[opt] nested-name-specifier[opt] type-name :: ~type-name
966 /// ::[opt] nested-name-specifier template simple-template-id ::
968 /// ::[opt] nested-name-specifier[opt] ~type-name
971 Parser::ParseCXXPseudoDestructor(ExprArg Base, SourceLocation OpLoc,
972 tok::TokenKind OpKind,
974 ParsedType ObjectType) {
975 // We're parsing either a pseudo-destructor-name or a dependent
976 // member access that has the same form as a
977 // pseudo-destructor-name. We parse both in the same way and let
978 // the action model sort them out.
980 // Note that the ::[opt] nested-name-specifier[opt] has already
981 // been parsed, and if there was a simple-template-id, it has
982 // been coalesced into a template-id annotation token.
983 UnqualifiedId FirstTypeName;
984 SourceLocation CCLoc;
985 if (Tok.is(tok::identifier)) {
986 FirstTypeName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
988 assert(Tok.is(tok::coloncolon) &&"ParseOptionalCXXScopeSpecifier fail");
989 CCLoc = ConsumeToken();
990 } else if (Tok.is(tok::annot_template_id)) {
991 FirstTypeName.setTemplateId(
992 (TemplateIdAnnotation *)Tok.getAnnotationValue());
994 assert(Tok.is(tok::coloncolon) &&"ParseOptionalCXXScopeSpecifier fail");
995 CCLoc = ConsumeToken();
997 FirstTypeName.setIdentifier(0, SourceLocation());
1001 assert(Tok.is(tok::tilde) && "ParseOptionalCXXScopeSpecifier fail");
1002 SourceLocation TildeLoc = ConsumeToken();
1003 if (!Tok.is(tok::identifier)) {
1004 Diag(Tok, diag::err_destructor_tilde_identifier);
1008 // Parse the second type.
1009 UnqualifiedId SecondTypeName;
1010 IdentifierInfo *Name = Tok.getIdentifierInfo();
1011 SourceLocation NameLoc = ConsumeToken();
1012 SecondTypeName.setIdentifier(Name, NameLoc);
1014 // If there is a '<', the second type name is a template-id. Parse
1016 if (Tok.is(tok::less) &&
1017 ParseUnqualifiedIdTemplateId(SS, Name, NameLoc, false, ObjectType,
1018 SecondTypeName, /*AssumeTemplateName=*/true,
1019 /*TemplateKWLoc*/SourceLocation()))
1022 return Actions.ActOnPseudoDestructorExpr(getCurScope(), Base,
1024 SS, FirstTypeName, CCLoc,
1025 TildeLoc, SecondTypeName,
1026 Tok.is(tok::l_paren));
1029 /// ParseCXXBoolLiteral - This handles the C++ Boolean literals.
1031 /// boolean-literal: [C++ 2.13.5]
1034 ExprResult Parser::ParseCXXBoolLiteral() {
1035 tok::TokenKind Kind = Tok.getKind();
1036 return Actions.ActOnCXXBoolLiteral(ConsumeToken(), Kind);
1039 /// ParseThrowExpression - This handles the C++ throw expression.
1041 /// throw-expression: [C++ 15]
1042 /// 'throw' assignment-expression[opt]
1043 ExprResult Parser::ParseThrowExpression() {
1044 assert(Tok.is(tok::kw_throw) && "Not throw!");
1045 SourceLocation ThrowLoc = ConsumeToken(); // Eat the throw token.
1047 // If the current token isn't the start of an assignment-expression,
1048 // then the expression is not present. This handles things like:
1049 // "C ? throw : (void)42", which is crazy but legal.
1050 switch (Tok.getKind()) { // FIXME: move this predicate somewhere common.
1057 return Actions.ActOnCXXThrow(getCurScope(), ThrowLoc, 0);
1060 ExprResult Expr(ParseAssignmentExpression());
1061 if (Expr.isInvalid()) return move(Expr);
1062 return Actions.ActOnCXXThrow(getCurScope(), ThrowLoc, Expr.take());
1066 /// ParseCXXThis - This handles the C++ 'this' pointer.
1068 /// C++ 9.3.2: In the body of a non-static member function, the keyword this is
1069 /// a non-lvalue expression whose value is the address of the object for which
1070 /// the function is called.
1071 ExprResult Parser::ParseCXXThis() {
1072 assert(Tok.is(tok::kw_this) && "Not 'this'!");
1073 SourceLocation ThisLoc = ConsumeToken();
1074 return Actions.ActOnCXXThis(ThisLoc);
1077 /// ParseCXXTypeConstructExpression - Parse construction of a specified type.
1078 /// Can be interpreted either as function-style casting ("int(x)")
1079 /// or class type construction ("ClassType(x,y,z)")
1080 /// or creation of a value-initialized type ("int()").
1081 /// See [C++ 5.2.3].
1083 /// postfix-expression: [C++ 5.2p1]
1084 /// simple-type-specifier '(' expression-list[opt] ')'
1085 /// [C++0x] simple-type-specifier braced-init-list
1086 /// typename-specifier '(' expression-list[opt] ')'
1087 /// [C++0x] typename-specifier braced-init-list
1090 Parser::ParseCXXTypeConstructExpression(const DeclSpec &DS) {
1091 Declarator DeclaratorInfo(DS, Declarator::TypeNameContext);
1092 ParsedType TypeRep = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo).get();
1094 assert((Tok.is(tok::l_paren) ||
1095 (getLang().CPlusPlus0x && Tok.is(tok::l_brace)))
1096 && "Expected '(' or '{'!");
1098 if (Tok.is(tok::l_brace)) {
1100 // FIXME: Convert to a proper type construct expression.
1101 return ParseBraceInitializer();
1104 GreaterThanIsOperatorScope G(GreaterThanIsOperator, true);
1106 BalancedDelimiterTracker T(*this, tok::l_paren);
1109 ExprVector Exprs(Actions);
1110 CommaLocsTy CommaLocs;
1112 if (Tok.isNot(tok::r_paren)) {
1113 if (ParseExpressionList(Exprs, CommaLocs)) {
1114 SkipUntil(tok::r_paren);
1122 // TypeRep could be null, if it references an invalid typedef.
1126 assert((Exprs.size() == 0 || Exprs.size()-1 == CommaLocs.size())&&
1127 "Unexpected number of commas!");
1128 return Actions.ActOnCXXTypeConstructExpr(TypeRep, T.getOpenLocation(),
1130 T.getCloseLocation());
1134 /// ParseCXXCondition - if/switch/while condition expression.
1138 /// type-specifier-seq declarator '=' assignment-expression
1139 /// [GNU] type-specifier-seq declarator simple-asm-expr[opt] attributes[opt]
1140 /// '=' assignment-expression
1142 /// \param ExprResult if the condition was parsed as an expression, the
1143 /// parsed expression.
1145 /// \param DeclResult if the condition was parsed as a declaration, the
1146 /// parsed declaration.
1148 /// \param Loc The location of the start of the statement that requires this
1149 /// condition, e.g., the "for" in a for loop.
1151 /// \param ConvertToBoolean Whether the condition expression should be
1152 /// converted to a boolean value.
1154 /// \returns true if there was a parsing, false otherwise.
1155 bool Parser::ParseCXXCondition(ExprResult &ExprOut,
1158 bool ConvertToBoolean) {
1159 if (Tok.is(tok::code_completion)) {
1160 Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Condition);
1165 if (!isCXXConditionDeclaration()) {
1166 // Parse the expression.
1167 ExprOut = ParseExpression(); // expression
1169 if (ExprOut.isInvalid())
1172 // If required, convert to a boolean value.
1173 if (ConvertToBoolean)
1175 = Actions.ActOnBooleanCondition(getCurScope(), Loc, ExprOut.get());
1176 return ExprOut.isInvalid();
1179 // type-specifier-seq
1180 DeclSpec DS(AttrFactory);
1181 ParseSpecifierQualifierList(DS);
1184 Declarator DeclaratorInfo(DS, Declarator::ConditionContext);
1185 ParseDeclarator(DeclaratorInfo);
1187 // simple-asm-expr[opt]
1188 if (Tok.is(tok::kw_asm)) {
1190 ExprResult AsmLabel(ParseSimpleAsm(&Loc));
1191 if (AsmLabel.isInvalid()) {
1192 SkipUntil(tok::semi);
1195 DeclaratorInfo.setAsmLabel(AsmLabel.release());
1196 DeclaratorInfo.SetRangeEnd(Loc);
1199 // If attributes are present, parse them.
1200 MaybeParseGNUAttributes(DeclaratorInfo);
1202 // Type-check the declaration itself.
1203 DeclResult Dcl = Actions.ActOnCXXConditionDeclaration(getCurScope(),
1205 DeclOut = Dcl.get();
1206 ExprOut = ExprError();
1208 // '=' assignment-expression
1209 if (isTokenEqualOrMistypedEqualEqual(
1210 diag::err_invalid_equalequal_after_declarator)) {
1212 ExprResult AssignExpr(ParseAssignmentExpression());
1213 if (!AssignExpr.isInvalid())
1214 Actions.AddInitializerToDecl(DeclOut, AssignExpr.take(), false,
1215 DS.getTypeSpecType() == DeclSpec::TST_auto);
1217 // FIXME: C++0x allows a braced-init-list
1218 Diag(Tok, diag::err_expected_equal_after_declarator);
1221 // FIXME: Build a reference to this declaration? Convert it to bool?
1222 // (This is currently handled by Sema).
1224 Actions.FinalizeDeclaration(DeclOut);
1229 /// \brief Determine whether the current token starts a C++
1230 /// simple-type-specifier.
1231 bool Parser::isCXXSimpleTypeSpecifier() const {
1232 switch (Tok.getKind()) {
1233 case tok::annot_typename:
1236 case tok::kw___int64:
1237 case tok::kw_signed:
1238 case tok::kw_unsigned:
1244 case tok::kw_double:
1245 case tok::kw_wchar_t:
1246 case tok::kw_char16_t:
1247 case tok::kw_char32_t:
1249 case tok::kw_decltype:
1250 case tok::kw_typeof:
1251 case tok::kw___underlying_type:
1261 /// ParseCXXSimpleTypeSpecifier - [C++ 7.1.5.2] Simple type specifiers.
1262 /// This should only be called when the current token is known to be part of
1263 /// simple-type-specifier.
1265 /// simple-type-specifier:
1266 /// '::'[opt] nested-name-specifier[opt] type-name
1267 /// '::'[opt] nested-name-specifier 'template' simple-template-id [TODO]
1279 /// [GNU] typeof-specifier
1280 /// [C++0x] auto [TODO]
1287 void Parser::ParseCXXSimpleTypeSpecifier(DeclSpec &DS) {
1288 DS.SetRangeStart(Tok.getLocation());
1289 const char *PrevSpec;
1291 SourceLocation Loc = Tok.getLocation();
1293 switch (Tok.getKind()) {
1294 case tok::identifier: // foo::bar
1295 case tok::coloncolon: // ::foo::bar
1296 llvm_unreachable("Annotation token should already be formed!");
1298 llvm_unreachable("Not a simple-type-specifier token!");
1301 case tok::annot_typename: {
1302 if (getTypeAnnotation(Tok))
1303 DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID,
1304 getTypeAnnotation(Tok));
1306 DS.SetTypeSpecError();
1308 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
1311 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id'
1312 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an
1313 // Objective-C interface. If we don't have Objective-C or a '<', this is
1314 // just a normal reference to a typedef name.
1315 if (Tok.is(tok::less) && getLang().ObjC1)
1316 ParseObjCProtocolQualifiers(DS);
1318 DS.Finish(Diags, PP);
1324 DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, DiagID);
1327 DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, DiagID);
1329 case tok::kw___int64:
1330 DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, DiagID);
1332 case tok::kw_signed:
1333 DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, DiagID);
1335 case tok::kw_unsigned:
1336 DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, DiagID);
1339 DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, DiagID);
1342 DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, DiagID);
1345 DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, DiagID);
1348 DS.SetTypeSpecType(DeclSpec::TST_half, Loc, PrevSpec, DiagID);
1351 DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, DiagID);
1353 case tok::kw_double:
1354 DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, DiagID);
1356 case tok::kw_wchar_t:
1357 DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, DiagID);
1359 case tok::kw_char16_t:
1360 DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, DiagID);
1362 case tok::kw_char32_t:
1363 DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, DiagID);
1366 DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, DiagID);
1369 // FIXME: C++0x decltype support.
1370 // GNU typeof support.
1371 case tok::kw_typeof:
1372 ParseTypeofSpecifier(DS);
1373 DS.Finish(Diags, PP);
1376 if (Tok.is(tok::annot_typename))
1377 DS.SetRangeEnd(Tok.getAnnotationEndLoc());
1379 DS.SetRangeEnd(Tok.getLocation());
1381 DS.Finish(Diags, PP);
1384 /// ParseCXXTypeSpecifierSeq - Parse a C++ type-specifier-seq (C++
1385 /// [dcl.name]), which is a non-empty sequence of type-specifiers,
1386 /// e.g., "const short int". Note that the DeclSpec is *not* finished
1387 /// by parsing the type-specifier-seq, because these sequences are
1388 /// typically followed by some form of declarator. Returns true and
1389 /// emits diagnostics if this is not a type-specifier-seq, false
1392 /// type-specifier-seq: [C++ 8.1]
1393 /// type-specifier type-specifier-seq[opt]
1395 bool Parser::ParseCXXTypeSpecifierSeq(DeclSpec &DS) {
1396 DS.SetRangeStart(Tok.getLocation());
1397 const char *PrevSpec = 0;
1401 // Parse one or more of the type specifiers.
1402 if (!ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID,
1403 ParsedTemplateInfo(), /*SuppressDeclarations*/true)) {
1404 Diag(Tok, diag::err_expected_type);
1408 while (ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID,
1409 ParsedTemplateInfo(), /*SuppressDeclarations*/true))
1412 DS.Finish(Diags, PP);
1416 /// \brief Finish parsing a C++ unqualified-id that is a template-id of
1419 /// This routine is invoked when a '<' is encountered after an identifier or
1420 /// operator-function-id is parsed by \c ParseUnqualifiedId() to determine
1421 /// whether the unqualified-id is actually a template-id. This routine will
1422 /// then parse the template arguments and form the appropriate template-id to
1423 /// return to the caller.
1425 /// \param SS the nested-name-specifier that precedes this template-id, if
1426 /// we're actually parsing a qualified-id.
1428 /// \param Name for constructor and destructor names, this is the actual
1429 /// identifier that may be a template-name.
1431 /// \param NameLoc the location of the class-name in a constructor or
1434 /// \param EnteringContext whether we're entering the scope of the
1435 /// nested-name-specifier.
1437 /// \param ObjectType if this unqualified-id occurs within a member access
1438 /// expression, the type of the base object whose member is being accessed.
1440 /// \param Id as input, describes the template-name or operator-function-id
1441 /// that precedes the '<'. If template arguments were parsed successfully,
1442 /// will be updated with the template-id.
1444 /// \param AssumeTemplateId When true, this routine will assume that the name
1445 /// refers to a template without performing name lookup to verify.
1447 /// \returns true if a parse error occurred, false otherwise.
1448 bool Parser::ParseUnqualifiedIdTemplateId(CXXScopeSpec &SS,
1449 IdentifierInfo *Name,
1450 SourceLocation NameLoc,
1451 bool EnteringContext,
1452 ParsedType ObjectType,
1454 bool AssumeTemplateId,
1455 SourceLocation TemplateKWLoc) {
1456 assert((AssumeTemplateId || Tok.is(tok::less)) &&
1457 "Expected '<' to finish parsing a template-id");
1459 TemplateTy Template;
1460 TemplateNameKind TNK = TNK_Non_template;
1461 switch (Id.getKind()) {
1462 case UnqualifiedId::IK_Identifier:
1463 case UnqualifiedId::IK_OperatorFunctionId:
1464 case UnqualifiedId::IK_LiteralOperatorId:
1465 if (AssumeTemplateId) {
1466 TNK = Actions.ActOnDependentTemplateName(getCurScope(), TemplateKWLoc, SS,
1467 Id, ObjectType, EnteringContext,
1469 if (TNK == TNK_Non_template)
1472 bool MemberOfUnknownSpecialization;
1473 TNK = Actions.isTemplateName(getCurScope(), SS,
1474 TemplateKWLoc.isValid(), Id,
1475 ObjectType, EnteringContext, Template,
1476 MemberOfUnknownSpecialization);
1478 if (TNK == TNK_Non_template && MemberOfUnknownSpecialization &&
1479 ObjectType && IsTemplateArgumentList()) {
1480 // We have something like t->getAs<T>(), where getAs is a
1481 // member of an unknown specialization. However, this will only
1482 // parse correctly as a template, so suggest the keyword 'template'
1483 // before 'getAs' and treat this as a dependent template name.
1485 if (Id.getKind() == UnqualifiedId::IK_Identifier)
1486 Name = Id.Identifier->getName();
1489 if (Id.getKind() == UnqualifiedId::IK_OperatorFunctionId)
1490 Name += getOperatorSpelling(Id.OperatorFunctionId.Operator);
1492 Name += Id.Identifier->getName();
1494 Diag(Id.StartLocation, diag::err_missing_dependent_template_keyword)
1496 << FixItHint::CreateInsertion(Id.StartLocation, "template ");
1497 TNK = Actions.ActOnDependentTemplateName(getCurScope(), TemplateKWLoc,
1499 EnteringContext, Template);
1500 if (TNK == TNK_Non_template)
1506 case UnqualifiedId::IK_ConstructorName: {
1507 UnqualifiedId TemplateName;
1508 bool MemberOfUnknownSpecialization;
1509 TemplateName.setIdentifier(Name, NameLoc);
1510 TNK = Actions.isTemplateName(getCurScope(), SS, TemplateKWLoc.isValid(),
1511 TemplateName, ObjectType,
1512 EnteringContext, Template,
1513 MemberOfUnknownSpecialization);
1517 case UnqualifiedId::IK_DestructorName: {
1518 UnqualifiedId TemplateName;
1519 bool MemberOfUnknownSpecialization;
1520 TemplateName.setIdentifier(Name, NameLoc);
1522 TNK = Actions.ActOnDependentTemplateName(getCurScope(), TemplateKWLoc, SS,
1523 TemplateName, ObjectType,
1524 EnteringContext, Template);
1525 if (TNK == TNK_Non_template)
1528 TNK = Actions.isTemplateName(getCurScope(), SS, TemplateKWLoc.isValid(),
1529 TemplateName, ObjectType,
1530 EnteringContext, Template,
1531 MemberOfUnknownSpecialization);
1533 if (TNK == TNK_Non_template && !Id.DestructorName.get()) {
1534 Diag(NameLoc, diag::err_destructor_template_id)
1535 << Name << SS.getRange();
1546 if (TNK == TNK_Non_template)
1549 // Parse the enclosed template argument list.
1550 SourceLocation LAngleLoc, RAngleLoc;
1551 TemplateArgList TemplateArgs;
1552 if (Tok.is(tok::less) &&
1553 ParseTemplateIdAfterTemplateName(Template, Id.StartLocation,
1554 SS, true, LAngleLoc,
1559 if (Id.getKind() == UnqualifiedId::IK_Identifier ||
1560 Id.getKind() == UnqualifiedId::IK_OperatorFunctionId ||
1561 Id.getKind() == UnqualifiedId::IK_LiteralOperatorId) {
1562 // Form a parsed representation of the template-id to be stored in the
1564 TemplateIdAnnotation *TemplateId
1565 = TemplateIdAnnotation::Allocate(TemplateArgs.size());
1567 if (Id.getKind() == UnqualifiedId::IK_Identifier) {
1568 TemplateId->Name = Id.Identifier;
1569 TemplateId->Operator = OO_None;
1570 TemplateId->TemplateNameLoc = Id.StartLocation;
1572 TemplateId->Name = 0;
1573 TemplateId->Operator = Id.OperatorFunctionId.Operator;
1574 TemplateId->TemplateNameLoc = Id.StartLocation;
1577 TemplateId->SS = SS;
1578 TemplateId->Template = Template;
1579 TemplateId->Kind = TNK;
1580 TemplateId->LAngleLoc = LAngleLoc;
1581 TemplateId->RAngleLoc = RAngleLoc;
1582 ParsedTemplateArgument *Args = TemplateId->getTemplateArgs();
1583 for (unsigned Arg = 0, ArgEnd = TemplateArgs.size();
1584 Arg != ArgEnd; ++Arg)
1585 Args[Arg] = TemplateArgs[Arg];
1587 Id.setTemplateId(TemplateId);
1591 // Bundle the template arguments together.
1592 ASTTemplateArgsPtr TemplateArgsPtr(Actions, TemplateArgs.data(),
1593 TemplateArgs.size());
1595 // Constructor and destructor names.
1597 = Actions.ActOnTemplateIdType(SS, Template, NameLoc,
1598 LAngleLoc, TemplateArgsPtr,
1600 if (Type.isInvalid())
1603 if (Id.getKind() == UnqualifiedId::IK_ConstructorName)
1604 Id.setConstructorName(Type.get(), NameLoc, RAngleLoc);
1606 Id.setDestructorName(Id.StartLocation, Type.get(), RAngleLoc);
1611 /// \brief Parse an operator-function-id or conversion-function-id as part
1612 /// of a C++ unqualified-id.
1614 /// This routine is responsible only for parsing the operator-function-id or
1615 /// conversion-function-id; it does not handle template arguments in any way.
1618 /// operator-function-id: [C++ 13.5]
1619 /// 'operator' operator
1621 /// operator: one of
1622 /// new delete new[] delete[]
1623 /// + - * / % ^ & | ~
1624 /// ! = < > += -= *= /= %=
1625 /// ^= &= |= << >> >>= <<= == !=
1626 /// <= >= && || ++ -- , ->* ->
1629 /// conversion-function-id: [C++ 12.3.2]
1630 /// operator conversion-type-id
1632 /// conversion-type-id:
1633 /// type-specifier-seq conversion-declarator[opt]
1635 /// conversion-declarator:
1636 /// ptr-operator conversion-declarator[opt]
1639 /// \param The nested-name-specifier that preceded this unqualified-id. If
1640 /// non-empty, then we are parsing the unqualified-id of a qualified-id.
1642 /// \param EnteringContext whether we are entering the scope of the
1643 /// nested-name-specifier.
1645 /// \param ObjectType if this unqualified-id occurs within a member access
1646 /// expression, the type of the base object whose member is being accessed.
1648 /// \param Result on a successful parse, contains the parsed unqualified-id.
1650 /// \returns true if parsing fails, false otherwise.
1651 bool Parser::ParseUnqualifiedIdOperator(CXXScopeSpec &SS, bool EnteringContext,
1652 ParsedType ObjectType,
1653 UnqualifiedId &Result) {
1654 assert(Tok.is(tok::kw_operator) && "Expected 'operator' keyword");
1656 // Consume the 'operator' keyword.
1657 SourceLocation KeywordLoc = ConsumeToken();
1659 // Determine what kind of operator name we have.
1660 unsigned SymbolIdx = 0;
1661 SourceLocation SymbolLocations[3];
1662 OverloadedOperatorKind Op = OO_None;
1663 switch (Tok.getKind()) {
1665 case tok::kw_delete: {
1666 bool isNew = Tok.getKind() == tok::kw_new;
1667 // Consume the 'new' or 'delete'.
1668 SymbolLocations[SymbolIdx++] = ConsumeToken();
1669 if (Tok.is(tok::l_square)) {
1670 // Consume the '[' and ']'.
1671 BalancedDelimiterTracker T(*this, tok::l_square);
1674 if (T.getCloseLocation().isInvalid())
1677 SymbolLocations[SymbolIdx++] = T.getOpenLocation();
1678 SymbolLocations[SymbolIdx++] = T.getCloseLocation();
1679 Op = isNew? OO_Array_New : OO_Array_Delete;
1681 Op = isNew? OO_New : OO_Delete;
1686 #define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
1688 SymbolLocations[SymbolIdx++] = ConsumeToken(); \
1691 #define OVERLOADED_OPERATOR_MULTI(Name,Spelling,Unary,Binary,MemberOnly)
1692 #include "clang/Basic/OperatorKinds.def"
1694 case tok::l_paren: {
1695 // Consume the '(' and ')'.
1696 BalancedDelimiterTracker T(*this, tok::l_paren);
1699 if (T.getCloseLocation().isInvalid())
1702 SymbolLocations[SymbolIdx++] = T.getOpenLocation();
1703 SymbolLocations[SymbolIdx++] = T.getCloseLocation();
1708 case tok::l_square: {
1709 // Consume the '[' and ']'.
1710 BalancedDelimiterTracker T(*this, tok::l_square);
1713 if (T.getCloseLocation().isInvalid())
1716 SymbolLocations[SymbolIdx++] = T.getOpenLocation();
1717 SymbolLocations[SymbolIdx++] = T.getCloseLocation();
1722 case tok::code_completion: {
1723 // Code completion for the operator name.
1724 Actions.CodeCompleteOperatorName(getCurScope());
1726 // Don't try to parse any further.
1734 if (Op != OO_None) {
1735 // We have parsed an operator-function-id.
1736 Result.setOperatorFunctionId(KeywordLoc, Op, SymbolLocations);
1740 // Parse a literal-operator-id.
1742 // literal-operator-id: [C++0x 13.5.8]
1743 // operator "" identifier
1745 if (getLang().CPlusPlus0x && Tok.is(tok::string_literal)) {
1746 if (Tok.getLength() != 2)
1747 Diag(Tok.getLocation(), diag::err_operator_string_not_empty);
1748 ConsumeStringToken();
1750 if (Tok.isNot(tok::identifier)) {
1751 Diag(Tok.getLocation(), diag::err_expected_ident);
1755 IdentifierInfo *II = Tok.getIdentifierInfo();
1756 Result.setLiteralOperatorId(II, KeywordLoc, ConsumeToken());
1760 // Parse a conversion-function-id.
1762 // conversion-function-id: [C++ 12.3.2]
1763 // operator conversion-type-id
1765 // conversion-type-id:
1766 // type-specifier-seq conversion-declarator[opt]
1768 // conversion-declarator:
1769 // ptr-operator conversion-declarator[opt]
1771 // Parse the type-specifier-seq.
1772 DeclSpec DS(AttrFactory);
1773 if (ParseCXXTypeSpecifierSeq(DS)) // FIXME: ObjectType?
1776 // Parse the conversion-declarator, which is merely a sequence of
1778 Declarator D(DS, Declarator::TypeNameContext);
1779 ParseDeclaratorInternal(D, /*DirectDeclParser=*/0);
1781 // Finish up the type.
1782 TypeResult Ty = Actions.ActOnTypeName(getCurScope(), D);
1786 // Note that this is a conversion-function-id.
1787 Result.setConversionFunctionId(KeywordLoc, Ty.get(),
1788 D.getSourceRange().getEnd());
1792 /// \brief Parse a C++ unqualified-id (or a C identifier), which describes the
1793 /// name of an entity.
1796 /// unqualified-id: [C++ expr.prim.general]
1798 /// operator-function-id
1799 /// conversion-function-id
1800 /// [C++0x] literal-operator-id [TODO]
1806 /// \param The nested-name-specifier that preceded this unqualified-id. If
1807 /// non-empty, then we are parsing the unqualified-id of a qualified-id.
1809 /// \param EnteringContext whether we are entering the scope of the
1810 /// nested-name-specifier.
1812 /// \param AllowDestructorName whether we allow parsing of a destructor name.
1814 /// \param AllowConstructorName whether we allow parsing a constructor name.
1816 /// \param ObjectType if this unqualified-id occurs within a member access
1817 /// expression, the type of the base object whose member is being accessed.
1819 /// \param Result on a successful parse, contains the parsed unqualified-id.
1821 /// \returns true if parsing fails, false otherwise.
1822 bool Parser::ParseUnqualifiedId(CXXScopeSpec &SS, bool EnteringContext,
1823 bool AllowDestructorName,
1824 bool AllowConstructorName,
1825 ParsedType ObjectType,
1826 UnqualifiedId &Result) {
1828 // Handle 'A::template B'. This is for template-ids which have not
1829 // already been annotated by ParseOptionalCXXScopeSpecifier().
1830 bool TemplateSpecified = false;
1831 SourceLocation TemplateKWLoc;
1832 if (getLang().CPlusPlus && Tok.is(tok::kw_template) &&
1833 (ObjectType || SS.isSet())) {
1834 TemplateSpecified = true;
1835 TemplateKWLoc = ConsumeToken();
1840 // template-id (when it hasn't already been annotated)
1841 if (Tok.is(tok::identifier)) {
1842 // Consume the identifier.
1843 IdentifierInfo *Id = Tok.getIdentifierInfo();
1844 SourceLocation IdLoc = ConsumeToken();
1846 if (!getLang().CPlusPlus) {
1847 // If we're not in C++, only identifiers matter. Record the
1848 // identifier and return.
1849 Result.setIdentifier(Id, IdLoc);
1853 if (AllowConstructorName &&
1854 Actions.isCurrentClassName(*Id, getCurScope(), &SS)) {
1855 // We have parsed a constructor name.
1856 Result.setConstructorName(Actions.getTypeName(*Id, IdLoc, getCurScope(),
1859 /*NonTrivialTypeSourceInfo=*/true),
1862 // We have parsed an identifier.
1863 Result.setIdentifier(Id, IdLoc);
1866 // If the next token is a '<', we may have a template.
1867 if (TemplateSpecified || Tok.is(tok::less))
1868 return ParseUnqualifiedIdTemplateId(SS, Id, IdLoc, EnteringContext,
1870 TemplateSpecified, TemplateKWLoc);
1876 // template-id (already parsed and annotated)
1877 if (Tok.is(tok::annot_template_id)) {
1878 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1880 // If the template-name names the current class, then this is a constructor
1881 if (AllowConstructorName && TemplateId->Name &&
1882 Actions.isCurrentClassName(*TemplateId->Name, getCurScope(), &SS)) {
1884 // C++ [class.qual]p2 specifies that a qualified template-name
1885 // is taken as the constructor name where a constructor can be
1886 // declared. Thus, the template arguments are extraneous, so
1887 // complain about them and remove them entirely.
1888 Diag(TemplateId->TemplateNameLoc,
1889 diag::err_out_of_line_constructor_template_id)
1891 << FixItHint::CreateRemoval(
1892 SourceRange(TemplateId->LAngleLoc, TemplateId->RAngleLoc));
1893 Result.setConstructorName(Actions.getTypeName(*TemplateId->Name,
1894 TemplateId->TemplateNameLoc,
1898 /*NontrivialTypeSourceInfo=*/true),
1899 TemplateId->TemplateNameLoc,
1900 TemplateId->RAngleLoc);
1905 Result.setConstructorTemplateId(TemplateId);
1910 // We have already parsed a template-id; consume the annotation token as
1911 // our unqualified-id.
1912 Result.setTemplateId(TemplateId);
1918 // operator-function-id
1919 // conversion-function-id
1920 if (Tok.is(tok::kw_operator)) {
1921 if (ParseUnqualifiedIdOperator(SS, EnteringContext, ObjectType, Result))
1924 // If we have an operator-function-id or a literal-operator-id and the next
1925 // token is a '<', we may have a
1928 // operator-function-id < template-argument-list[opt] >
1929 if ((Result.getKind() == UnqualifiedId::IK_OperatorFunctionId ||
1930 Result.getKind() == UnqualifiedId::IK_LiteralOperatorId) &&
1931 (TemplateSpecified || Tok.is(tok::less)))
1932 return ParseUnqualifiedIdTemplateId(SS, 0, SourceLocation(),
1933 EnteringContext, ObjectType,
1935 TemplateSpecified, TemplateKWLoc);
1940 if (getLang().CPlusPlus &&
1941 (AllowDestructorName || SS.isSet()) && Tok.is(tok::tilde)) {
1942 // C++ [expr.unary.op]p10:
1943 // There is an ambiguity in the unary-expression ~X(), where X is a
1944 // class-name. The ambiguity is resolved in favor of treating ~ as a
1945 // unary complement rather than treating ~X as referring to a destructor.
1948 SourceLocation TildeLoc = ConsumeToken();
1950 // Parse the class-name.
1951 if (Tok.isNot(tok::identifier)) {
1952 Diag(Tok, diag::err_destructor_tilde_identifier);
1956 // Parse the class-name (or template-name in a simple-template-id).
1957 IdentifierInfo *ClassName = Tok.getIdentifierInfo();
1958 SourceLocation ClassNameLoc = ConsumeToken();
1960 if (TemplateSpecified || Tok.is(tok::less)) {
1961 Result.setDestructorName(TildeLoc, ParsedType(), ClassNameLoc);
1962 return ParseUnqualifiedIdTemplateId(SS, ClassName, ClassNameLoc,
1963 EnteringContext, ObjectType, Result,
1964 TemplateSpecified, TemplateKWLoc);
1967 // Note that this is a destructor name.
1968 ParsedType Ty = Actions.getDestructorName(TildeLoc, *ClassName,
1969 ClassNameLoc, getCurScope(),
1975 Result.setDestructorName(TildeLoc, Ty, ClassNameLoc);
1979 Diag(Tok, diag::err_expected_unqualified_id)
1980 << getLang().CPlusPlus;
1984 /// ParseCXXNewExpression - Parse a C++ new-expression. New is used to allocate
1985 /// memory in a typesafe manner and call constructors.
1987 /// This method is called to parse the new expression after the optional :: has
1988 /// been already parsed. If the :: was present, "UseGlobal" is true and "Start"
1989 /// is its location. Otherwise, "Start" is the location of the 'new' token.
1992 /// '::'[opt] 'new' new-placement[opt] new-type-id
1993 /// new-initializer[opt]
1994 /// '::'[opt] 'new' new-placement[opt] '(' type-id ')'
1995 /// new-initializer[opt]
1998 /// '(' expression-list ')'
2001 /// type-specifier-seq new-declarator[opt]
2002 /// [GNU] attributes type-specifier-seq new-declarator[opt]
2005 /// ptr-operator new-declarator[opt]
2006 /// direct-new-declarator
2008 /// new-initializer:
2009 /// '(' expression-list[opt] ')'
2010 /// [C++0x] braced-init-list
2013 Parser::ParseCXXNewExpression(bool UseGlobal, SourceLocation Start) {
2014 assert(Tok.is(tok::kw_new) && "expected 'new' token");
2015 ConsumeToken(); // Consume 'new'
2017 // A '(' now can be a new-placement or the '(' wrapping the type-id in the
2018 // second form of new-expression. It can't be a new-type-id.
2020 ExprVector PlacementArgs(Actions);
2021 SourceLocation PlacementLParen, PlacementRParen;
2023 SourceRange TypeIdParens;
2024 DeclSpec DS(AttrFactory);
2025 Declarator DeclaratorInfo(DS, Declarator::CXXNewContext);
2026 if (Tok.is(tok::l_paren)) {
2027 // If it turns out to be a placement, we change the type location.
2028 BalancedDelimiterTracker T(*this, tok::l_paren);
2030 PlacementLParen = T.getOpenLocation();
2031 if (ParseExpressionListOrTypeId(PlacementArgs, DeclaratorInfo)) {
2032 SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true);
2037 PlacementRParen = T.getCloseLocation();
2038 if (PlacementRParen.isInvalid()) {
2039 SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true);
2043 if (PlacementArgs.empty()) {
2044 // Reset the placement locations. There was no placement.
2045 TypeIdParens = T.getRange();
2046 PlacementLParen = PlacementRParen = SourceLocation();
2048 // We still need the type.
2049 if (Tok.is(tok::l_paren)) {
2050 BalancedDelimiterTracker T(*this, tok::l_paren);
2052 MaybeParseGNUAttributes(DeclaratorInfo);
2053 ParseSpecifierQualifierList(DS);
2054 DeclaratorInfo.SetSourceRange(DS.getSourceRange());
2055 ParseDeclarator(DeclaratorInfo);
2057 TypeIdParens = T.getRange();
2059 MaybeParseGNUAttributes(DeclaratorInfo);
2060 if (ParseCXXTypeSpecifierSeq(DS))
2061 DeclaratorInfo.setInvalidType(true);
2063 DeclaratorInfo.SetSourceRange(DS.getSourceRange());
2064 ParseDeclaratorInternal(DeclaratorInfo,
2065 &Parser::ParseDirectNewDeclarator);
2070 // A new-type-id is a simplified type-id, where essentially the
2071 // direct-declarator is replaced by a direct-new-declarator.
2072 MaybeParseGNUAttributes(DeclaratorInfo);
2073 if (ParseCXXTypeSpecifierSeq(DS))
2074 DeclaratorInfo.setInvalidType(true);
2076 DeclaratorInfo.SetSourceRange(DS.getSourceRange());
2077 ParseDeclaratorInternal(DeclaratorInfo,
2078 &Parser::ParseDirectNewDeclarator);
2081 if (DeclaratorInfo.isInvalidType()) {
2082 SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true);
2086 ExprVector ConstructorArgs(Actions);
2087 SourceLocation ConstructorLParen, ConstructorRParen;
2089 if (Tok.is(tok::l_paren)) {
2090 BalancedDelimiterTracker T(*this, tok::l_paren);
2092 ConstructorLParen = T.getOpenLocation();
2093 if (Tok.isNot(tok::r_paren)) {
2094 CommaLocsTy CommaLocs;
2095 if (ParseExpressionList(ConstructorArgs, CommaLocs)) {
2096 SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true);
2101 ConstructorRParen = T.getCloseLocation();
2102 if (ConstructorRParen.isInvalid()) {
2103 SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true);
2106 } else if (Tok.is(tok::l_brace)) {
2107 // FIXME: Have to communicate the init-list to ActOnCXXNew.
2108 ParseBraceInitializer();
2111 return Actions.ActOnCXXNew(Start, UseGlobal, PlacementLParen,
2112 move_arg(PlacementArgs), PlacementRParen,
2113 TypeIdParens, DeclaratorInfo, ConstructorLParen,
2114 move_arg(ConstructorArgs), ConstructorRParen);
2117 /// ParseDirectNewDeclarator - Parses a direct-new-declarator. Intended to be
2118 /// passed to ParseDeclaratorInternal.
2120 /// direct-new-declarator:
2121 /// '[' expression ']'
2122 /// direct-new-declarator '[' constant-expression ']'
2124 void Parser::ParseDirectNewDeclarator(Declarator &D) {
2125 // Parse the array dimensions.
2127 while (Tok.is(tok::l_square)) {
2128 BalancedDelimiterTracker T(*this, tok::l_square);
2131 ExprResult Size(first ? ParseExpression()
2132 : ParseConstantExpression());
2133 if (Size.isInvalid()) {
2135 SkipUntil(tok::r_square);
2142 ParsedAttributes attrs(AttrFactory);
2143 D.AddTypeInfo(DeclaratorChunk::getArray(0,
2144 /*static=*/false, /*star=*/false,
2146 T.getOpenLocation(),
2147 T.getCloseLocation()),
2148 attrs, T.getCloseLocation());
2150 if (T.getCloseLocation().isInvalid())
2155 /// ParseExpressionListOrTypeId - Parse either an expression-list or a type-id.
2156 /// This ambiguity appears in the syntax of the C++ new operator.
2159 /// '::'[opt] 'new' new-placement[opt] '(' type-id ')'
2160 /// new-initializer[opt]
2163 /// '(' expression-list ')'
2165 bool Parser::ParseExpressionListOrTypeId(
2166 SmallVectorImpl<Expr*> &PlacementArgs,
2168 // The '(' was already consumed.
2169 if (isTypeIdInParens()) {
2170 ParseSpecifierQualifierList(D.getMutableDeclSpec());
2171 D.SetSourceRange(D.getDeclSpec().getSourceRange());
2173 return D.isInvalidType();
2176 // It's not a type, it has to be an expression list.
2177 // Discard the comma locations - ActOnCXXNew has enough parameters.
2178 CommaLocsTy CommaLocs;
2179 return ParseExpressionList(PlacementArgs, CommaLocs);
2182 /// ParseCXXDeleteExpression - Parse a C++ delete-expression. Delete is used
2183 /// to free memory allocated by new.
2185 /// This method is called to parse the 'delete' expression after the optional
2186 /// '::' has been already parsed. If the '::' was present, "UseGlobal" is true
2187 /// and "Start" is its location. Otherwise, "Start" is the location of the
2190 /// delete-expression:
2191 /// '::'[opt] 'delete' cast-expression
2192 /// '::'[opt] 'delete' '[' ']' cast-expression
2194 Parser::ParseCXXDeleteExpression(bool UseGlobal, SourceLocation Start) {
2195 assert(Tok.is(tok::kw_delete) && "Expected 'delete' keyword");
2196 ConsumeToken(); // Consume 'delete'
2199 bool ArrayDelete = false;
2200 if (Tok.is(tok::l_square)) {
2202 BalancedDelimiterTracker T(*this, tok::l_square);
2206 if (T.getCloseLocation().isInvalid())
2210 ExprResult Operand(ParseCastExpression(false));
2211 if (Operand.isInvalid())
2212 return move(Operand);
2214 return Actions.ActOnCXXDelete(Start, UseGlobal, ArrayDelete, Operand.take());
2217 static UnaryTypeTrait UnaryTypeTraitFromTokKind(tok::TokenKind kind) {
2219 default: llvm_unreachable("Not a known unary type trait.");
2220 case tok::kw___has_nothrow_assign: return UTT_HasNothrowAssign;
2221 case tok::kw___has_nothrow_constructor: return UTT_HasNothrowConstructor;
2222 case tok::kw___has_nothrow_copy: return UTT_HasNothrowCopy;
2223 case tok::kw___has_trivial_assign: return UTT_HasTrivialAssign;
2224 case tok::kw___has_trivial_constructor:
2225 return UTT_HasTrivialDefaultConstructor;
2226 case tok::kw___has_trivial_copy: return UTT_HasTrivialCopy;
2227 case tok::kw___has_trivial_destructor: return UTT_HasTrivialDestructor;
2228 case tok::kw___has_virtual_destructor: return UTT_HasVirtualDestructor;
2229 case tok::kw___is_abstract: return UTT_IsAbstract;
2230 case tok::kw___is_arithmetic: return UTT_IsArithmetic;
2231 case tok::kw___is_array: return UTT_IsArray;
2232 case tok::kw___is_class: return UTT_IsClass;
2233 case tok::kw___is_complete_type: return UTT_IsCompleteType;
2234 case tok::kw___is_compound: return UTT_IsCompound;
2235 case tok::kw___is_const: return UTT_IsConst;
2236 case tok::kw___is_empty: return UTT_IsEmpty;
2237 case tok::kw___is_enum: return UTT_IsEnum;
2238 case tok::kw___is_floating_point: return UTT_IsFloatingPoint;
2239 case tok::kw___is_function: return UTT_IsFunction;
2240 case tok::kw___is_fundamental: return UTT_IsFundamental;
2241 case tok::kw___is_integral: return UTT_IsIntegral;
2242 case tok::kw___is_lvalue_reference: return UTT_IsLvalueReference;
2243 case tok::kw___is_member_function_pointer: return UTT_IsMemberFunctionPointer;
2244 case tok::kw___is_member_object_pointer: return UTT_IsMemberObjectPointer;
2245 case tok::kw___is_member_pointer: return UTT_IsMemberPointer;
2246 case tok::kw___is_object: return UTT_IsObject;
2247 case tok::kw___is_literal: return UTT_IsLiteral;
2248 case tok::kw___is_literal_type: return UTT_IsLiteral;
2249 case tok::kw___is_pod: return UTT_IsPOD;
2250 case tok::kw___is_pointer: return UTT_IsPointer;
2251 case tok::kw___is_polymorphic: return UTT_IsPolymorphic;
2252 case tok::kw___is_reference: return UTT_IsReference;
2253 case tok::kw___is_rvalue_reference: return UTT_IsRvalueReference;
2254 case tok::kw___is_scalar: return UTT_IsScalar;
2255 case tok::kw___is_signed: return UTT_IsSigned;
2256 case tok::kw___is_standard_layout: return UTT_IsStandardLayout;
2257 case tok::kw___is_trivial: return UTT_IsTrivial;
2258 case tok::kw___is_trivially_copyable: return UTT_IsTriviallyCopyable;
2259 case tok::kw___is_union: return UTT_IsUnion;
2260 case tok::kw___is_unsigned: return UTT_IsUnsigned;
2261 case tok::kw___is_void: return UTT_IsVoid;
2262 case tok::kw___is_volatile: return UTT_IsVolatile;
2266 static BinaryTypeTrait BinaryTypeTraitFromTokKind(tok::TokenKind kind) {
2268 default: llvm_unreachable("Not a known binary type trait");
2269 case tok::kw___is_base_of: return BTT_IsBaseOf;
2270 case tok::kw___is_convertible: return BTT_IsConvertible;
2271 case tok::kw___is_same: return BTT_IsSame;
2272 case tok::kw___builtin_types_compatible_p: return BTT_TypeCompatible;
2273 case tok::kw___is_convertible_to: return BTT_IsConvertibleTo;
2277 static ArrayTypeTrait ArrayTypeTraitFromTokKind(tok::TokenKind kind) {
2279 default: llvm_unreachable("Not a known binary type trait");
2280 case tok::kw___array_rank: return ATT_ArrayRank;
2281 case tok::kw___array_extent: return ATT_ArrayExtent;
2285 static ExpressionTrait ExpressionTraitFromTokKind(tok::TokenKind kind) {
2287 default: llvm_unreachable("Not a known unary expression trait.");
2288 case tok::kw___is_lvalue_expr: return ET_IsLValueExpr;
2289 case tok::kw___is_rvalue_expr: return ET_IsRValueExpr;
2293 /// ParseUnaryTypeTrait - Parse the built-in unary type-trait
2294 /// pseudo-functions that allow implementation of the TR1/C++0x type traits
2297 /// primary-expression:
2298 /// [GNU] unary-type-trait '(' type-id ')'
2300 ExprResult Parser::ParseUnaryTypeTrait() {
2301 UnaryTypeTrait UTT = UnaryTypeTraitFromTokKind(Tok.getKind());
2302 SourceLocation Loc = ConsumeToken();
2304 BalancedDelimiterTracker T(*this, tok::l_paren);
2305 if (T.expectAndConsume(diag::err_expected_lparen))
2308 // FIXME: Error reporting absolutely sucks! If the this fails to parse a type
2309 // there will be cryptic errors about mismatched parentheses and missing
2311 TypeResult Ty = ParseTypeName();
2318 return Actions.ActOnUnaryTypeTrait(UTT, Loc, Ty.get(), T.getCloseLocation());
2321 /// ParseBinaryTypeTrait - Parse the built-in binary type-trait
2322 /// pseudo-functions that allow implementation of the TR1/C++0x type traits
2325 /// primary-expression:
2326 /// [GNU] binary-type-trait '(' type-id ',' type-id ')'
2328 ExprResult Parser::ParseBinaryTypeTrait() {
2329 BinaryTypeTrait BTT = BinaryTypeTraitFromTokKind(Tok.getKind());
2330 SourceLocation Loc = ConsumeToken();
2332 BalancedDelimiterTracker T(*this, tok::l_paren);
2333 if (T.expectAndConsume(diag::err_expected_lparen))
2336 TypeResult LhsTy = ParseTypeName();
2337 if (LhsTy.isInvalid()) {
2338 SkipUntil(tok::r_paren);
2342 if (ExpectAndConsume(tok::comma, diag::err_expected_comma)) {
2343 SkipUntil(tok::r_paren);
2347 TypeResult RhsTy = ParseTypeName();
2348 if (RhsTy.isInvalid()) {
2349 SkipUntil(tok::r_paren);
2355 return Actions.ActOnBinaryTypeTrait(BTT, Loc, LhsTy.get(), RhsTy.get(),
2356 T.getCloseLocation());
2359 /// ParseArrayTypeTrait - Parse the built-in array type-trait
2360 /// pseudo-functions.
2362 /// primary-expression:
2363 /// [Embarcadero] '__array_rank' '(' type-id ')'
2364 /// [Embarcadero] '__array_extent' '(' type-id ',' expression ')'
2366 ExprResult Parser::ParseArrayTypeTrait() {
2367 ArrayTypeTrait ATT = ArrayTypeTraitFromTokKind(Tok.getKind());
2368 SourceLocation Loc = ConsumeToken();
2370 BalancedDelimiterTracker T(*this, tok::l_paren);
2371 if (T.expectAndConsume(diag::err_expected_lparen))
2374 TypeResult Ty = ParseTypeName();
2375 if (Ty.isInvalid()) {
2376 SkipUntil(tok::comma);
2377 SkipUntil(tok::r_paren);
2382 case ATT_ArrayRank: {
2384 return Actions.ActOnArrayTypeTrait(ATT, Loc, Ty.get(), NULL,
2385 T.getCloseLocation());
2387 case ATT_ArrayExtent: {
2388 if (ExpectAndConsume(tok::comma, diag::err_expected_comma)) {
2389 SkipUntil(tok::r_paren);
2393 ExprResult DimExpr = ParseExpression();
2396 return Actions.ActOnArrayTypeTrait(ATT, Loc, Ty.get(), DimExpr.get(),
2397 T.getCloseLocation());
2405 /// ParseExpressionTrait - Parse built-in expression-trait
2406 /// pseudo-functions like __is_lvalue_expr( xxx ).
2408 /// primary-expression:
2409 /// [Embarcadero] expression-trait '(' expression ')'
2411 ExprResult Parser::ParseExpressionTrait() {
2412 ExpressionTrait ET = ExpressionTraitFromTokKind(Tok.getKind());
2413 SourceLocation Loc = ConsumeToken();
2415 BalancedDelimiterTracker T(*this, tok::l_paren);
2416 if (T.expectAndConsume(diag::err_expected_lparen))
2419 ExprResult Expr = ParseExpression();
2423 return Actions.ActOnExpressionTrait(ET, Loc, Expr.get(),
2424 T.getCloseLocation());
2428 /// ParseCXXAmbiguousParenExpression - We have parsed the left paren of a
2429 /// parenthesized ambiguous type-id. This uses tentative parsing to disambiguate
2430 /// based on the context past the parens.
2432 Parser::ParseCXXAmbiguousParenExpression(ParenParseOption &ExprType,
2434 BalancedDelimiterTracker &Tracker) {
2435 assert(getLang().CPlusPlus && "Should only be called for C++!");
2436 assert(ExprType == CastExpr && "Compound literals are not ambiguous!");
2437 assert(isTypeIdInParens() && "Not a type-id!");
2439 ExprResult Result(true);
2440 CastTy = ParsedType();
2442 // We need to disambiguate a very ugly part of the C++ syntax:
2444 // (T())x; - type-id
2445 // (T())*x; - type-id
2446 // (T())/x; - expression
2447 // (T()); - expression
2449 // The bad news is that we cannot use the specialized tentative parser, since
2450 // it can only verify that the thing inside the parens can be parsed as
2451 // type-id, it is not useful for determining the context past the parens.
2453 // The good news is that the parser can disambiguate this part without
2454 // making any unnecessary Action calls.
2456 // It uses a scheme similar to parsing inline methods. The parenthesized
2457 // tokens are cached, the context that follows is determined (possibly by
2458 // parsing a cast-expression), and then we re-introduce the cached tokens
2459 // into the token stream and parse them appropriately.
2461 ParenParseOption ParseAs;
2464 // Store the tokens of the parentheses. We will parse them after we determine
2465 // the context that follows them.
2466 if (!ConsumeAndStoreUntil(tok::r_paren, Toks)) {
2467 // We didn't find the ')' we expected.
2468 Tracker.consumeClose();
2472 if (Tok.is(tok::l_brace)) {
2473 ParseAs = CompoundLiteral;
2476 // FIXME: Special-case ++ and --: "(S())++;" is not a cast-expression
2477 if (Tok.is(tok::l_paren) && NextToken().is(tok::r_paren)) {
2480 // Try parsing the cast-expression that may follow.
2481 // If it is not a cast-expression, NotCastExpr will be true and no token
2482 // will be consumed.
2483 Result = ParseCastExpression(false/*isUnaryExpression*/,
2484 false/*isAddressofOperand*/,
2486 // type-id has priority.
2487 true/*isTypeCast*/);
2490 // If we parsed a cast-expression, it's really a type-id, otherwise it's
2492 ParseAs = NotCastExpr ? SimpleExpr : CastExpr;
2495 // The current token should go after the cached tokens.
2496 Toks.push_back(Tok);
2497 // Re-enter the stored parenthesized tokens into the token stream, so we may
2499 PP.EnterTokenStream(Toks.data(), Toks.size(),
2500 true/*DisableMacroExpansion*/, false/*OwnsTokens*/);
2501 // Drop the current token and bring the first cached one. It's the same token
2502 // as when we entered this function.
2505 if (ParseAs >= CompoundLiteral) {
2506 // Parse the type declarator.
2507 DeclSpec DS(AttrFactory);
2508 ParseSpecifierQualifierList(DS);
2509 Declarator DeclaratorInfo(DS, Declarator::TypeNameContext);
2510 ParseDeclarator(DeclaratorInfo);
2513 Tracker.consumeClose();
2515 if (ParseAs == CompoundLiteral) {
2516 ExprType = CompoundLiteral;
2517 TypeResult Ty = ParseTypeName();
2518 return ParseCompoundLiteralExpression(Ty.get(),
2519 Tracker.getOpenLocation(),
2520 Tracker.getCloseLocation());
2523 // We parsed '(' type-id ')' and the thing after it wasn't a '{'.
2524 assert(ParseAs == CastExpr);
2526 if (DeclaratorInfo.isInvalidType())
2529 // Result is what ParseCastExpression returned earlier.
2530 if (!Result.isInvalid())
2531 Result = Actions.ActOnCastExpr(getCurScope(), Tracker.getOpenLocation(),
2532 DeclaratorInfo, CastTy,
2533 Tracker.getCloseLocation(), Result.take());
2534 return move(Result);
2537 // Not a compound literal, and not followed by a cast-expression.
2538 assert(ParseAs == SimpleExpr);
2540 ExprType = SimpleExpr;
2541 Result = ParseExpression();
2542 if (!Result.isInvalid() && Tok.is(tok::r_paren))
2543 Result = Actions.ActOnParenExpr(Tracker.getOpenLocation(),
2544 Tok.getLocation(), Result.take());
2547 if (Result.isInvalid()) {
2548 SkipUntil(tok::r_paren);
2552 Tracker.consumeClose();
2553 return move(Result);