/// \brief Require that the context specified by SS be complete. /// /// If SS refers to a type, this routine checks whether the type is /// complete enough (or can be made complete enough) for name lookup /// into the DeclContext. A type that is not yet completed can be /// considered "complete enough" if it is a class/struct/union/enum /// that is currently being defined. Or, if we have a type that names /// a class template specialization that is not a complete type, we /// will attempt to instantiate that class template. bool Sema::RequireCompleteDeclContext(const CXXScopeSpec &SS) { if (!SS.isSet() || SS.isInvalid()) return false; DeclContext *DC = computeDeclContext(SS, true); if (TagDecl *Tag = dyn_cast<TagDecl>(DC)) { // If this is a dependent type, then we consider it complete. if (Tag->isDependentContext()) return false; // If we're currently defining this type, then lookup into the // type is okay: don't complain that it isn't complete yet. const TagType *TagT = Context.getTypeDeclType(Tag)->getAs<TagType>(); if (TagT->isBeingDefined()) return false; // The type must be complete. return RequireCompleteType(SS.getRange().getBegin(), Context.getTypeDeclType(Tag), PDiag(diag::err_incomplete_nested_name_spec) << SS.getRange()); } return false; }
/// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only /// annotates C++ scope specifiers and template-ids. This returns /// true if the token was annotated or there was an error that could not be /// recovered from. /// /// Note that this routine emits an error if you call it with ::new or ::delete /// as the current tokens, so only call it in contexts where these are invalid. bool Parser::TryAnnotateCXXScopeToken() { assert(getLang().CPlusPlus && "Call sites of this function should be guarded by checking for C++"); assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && "Cannot be a type or scope token!"); CXXScopeSpec SS; if (!ParseOptionalCXXScopeSpecifier(SS)) return Tok.is(tok::annot_template_id); // Push the current token back into the token stream (or revert it if it is // cached) and use an annotation scope token for current token. if (PP.isBacktrackEnabled()) PP.RevertCachedTokens(1); else PP.EnterToken(Tok); Tok.setKind(tok::annot_cxxscope); Tok.setAnnotationValue(SS.getScopeRep()); Tok.setAnnotationRange(SS.getRange()); // In case the tokens were cached, have Preprocessor replace them with the // annotation token. PP.AnnotateCachedTokens(Tok); return true; }
/// \brief Require that the context specified by SS be complete. /// /// If SS refers to a type, this routine checks whether the type is /// complete enough (or can be made complete enough) for name lookup /// into the DeclContext. A type that is not yet completed can be /// considered "complete enough" if it is a class/struct/union/enum /// that is currently being defined. Or, if we have a type that names /// a class template specialization that is not a complete type, we /// will attempt to instantiate that class template. bool Sema::RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC) { assert(DC != 0 && "given null context"); if (TagDecl *tag = dyn_cast<TagDecl>(DC)) { // If this is a dependent type, then we consider it complete. if (tag->isDependentContext()) return false; // If we're currently defining this type, then lookup into the // type is okay: don't complain that it isn't complete yet. QualType type = Context.getTypeDeclType(tag); const TagType *tagType = type->getAs<TagType>(); if (tagType && tagType->isBeingDefined()) return false; SourceLocation loc = SS.getLastQualifierNameLoc(); if (loc.isInvalid()) loc = SS.getRange().getBegin(); // The type must be complete. if (RequireCompleteType(loc, type, PDiag(diag::err_incomplete_nested_name_spec) << SS.getRange())) { SS.SetInvalid(SS.getRange()); return true; } // Fixed enum types are complete, but they aren't valid as scopes // until we see a definition, so awkwardly pull out this special // case. if (const EnumType *enumType = dyn_cast_or_null<EnumType>(tagType)) { if (!enumType->getDecl()->isCompleteDefinition()) { Diag(loc, diag::err_incomplete_nested_name_spec) << type << SS.getRange(); SS.SetInvalid(SS.getRange()); return true; } } } return false; }
bool Sema::isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, SourceLocation IdLoc, IdentifierInfo &II, ParsedType ObjectTypePtr) { QualType ObjectType = GetTypeFromParser(ObjectTypePtr); LookupResult Found(*this, &II, IdLoc, LookupNestedNameSpecifierName); // Determine where to perform name lookup DeclContext *LookupCtx = 0; bool isDependent = false; if (!ObjectType.isNull()) { // This nested-name-specifier occurs in a member access expression, e.g., // x->B::f, and we are looking into the type of the object. assert(!SS.isSet() && "ObjectType and scope specifier cannot coexist"); LookupCtx = computeDeclContext(ObjectType); isDependent = ObjectType->isDependentType(); } else if (SS.isSet()) { // This nested-name-specifier occurs after another nested-name-specifier, // so long into the context associated with the prior nested-name-specifier. LookupCtx = computeDeclContext(SS, false); isDependent = isDependentScopeSpecifier(SS); Found.setContextRange(SS.getRange()); } if (LookupCtx) { // Perform "qualified" name lookup into the declaration context we // computed, which is either the type of the base of a member access // expression or the declaration context associated with a prior // nested-name-specifier. // The declaration context must be complete. if (!LookupCtx->isDependentContext() && RequireCompleteDeclContext(SS, LookupCtx)) return false; LookupQualifiedName(Found, LookupCtx); } else if (isDependent) { return false; } else { LookupName(Found, S); } Found.suppressDiagnostics(); if (NamedDecl *ND = Found.getAsSingle<NamedDecl>()) return isa<NamespaceDecl>(ND) || isa<NamespaceAliasDecl>(ND); return false; }
bool Sema::DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, UnexpandedParameterPackContext UPPC) { // C++0x [temp.variadic]p5: // An appearance of a name of a parameter pack that is not expanded is // ill-formed. if (!SS.getScopeRep() || !SS.getScopeRep()->containsUnexpandedParameterPack()) return false; SmallVector<UnexpandedParameterPack, 2> Unexpanded; CollectUnexpandedParameterPacksVisitor(Unexpanded) .TraverseNestedNameSpecifier(SS.getScopeRep()); assert(!Unexpanded.empty() && "Unable to find unexpanded parameter packs"); return DiagnoseUnexpandedParameterPacks(SS.getRange().getBegin(), UPPC, Unexpanded); }
/// \brief Require that the context specified by SS be complete. /// /// If SS refers to a type, this routine checks whether the type is /// complete enough (or can be made complete enough) for name lookup /// into the DeclContext. A type that is not yet completed can be /// considered "complete enough" if it is a class/struct/union/enum /// that is currently being defined. Or, if we have a type that names /// a class template specialization that is not a complete type, we /// will attempt to instantiate that class template. bool Sema::RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC) { assert(DC && "given null context"); TagDecl *tag = dyn_cast<TagDecl>(DC); // If this is a dependent type, then we consider it complete. if (!tag || tag->isDependentContext()) return false; // If we're currently defining this type, then lookup into the // type is okay: don't complain that it isn't complete yet. QualType type = Context.getTypeDeclType(tag); const TagType *tagType = type->getAs<TagType>(); if (tagType && tagType->isBeingDefined()) return false; SourceLocation loc = SS.getLastQualifierNameLoc(); if (loc.isInvalid()) loc = SS.getRange().getBegin(); // The type must be complete. if (RequireCompleteType(loc, type, diag::err_incomplete_nested_name_spec, SS.getRange())) { SS.SetInvalid(SS.getRange()); return true; } // Fixed enum types are complete, but they aren't valid as scopes // until we see a definition, so awkwardly pull out this special // case. // FIXME: The definition might not be visible; complain if it is not. const EnumType *enumType = dyn_cast_or_null<EnumType>(tagType); if (!enumType || enumType->getDecl()->isCompleteDefinition()) return false; // Try to instantiate the definition, if this is a specialization of an // enumeration temploid. EnumDecl *ED = enumType->getDecl(); if (EnumDecl *Pattern = ED->getInstantiatedFromMemberEnum()) { MemberSpecializationInfo *MSI = ED->getMemberSpecializationInfo(); if (MSI->getTemplateSpecializationKind() != TSK_ExplicitSpecialization) { if (InstantiateEnum(loc, ED, Pattern, getTemplateInstantiationArgs(ED), TSK_ImplicitInstantiation)) { SS.SetInvalid(SS.getRange()); return true; } return false; } } Diag(loc, diag::err_incomplete_nested_name_spec) << type << SS.getRange(); SS.SetInvalid(SS.getRange()); return true; }
bool Sema::ActOnCXXNestedNameSpecifier(Scope *S, SourceLocation TemplateLoc, CXXScopeSpec &SS, TemplateTy Template, SourceLocation TemplateNameLoc, SourceLocation LAngleLoc, ASTTemplateArgsPtr TemplateArgsIn, SourceLocation RAngleLoc, SourceLocation CCLoc, bool EnteringContext) { if (SS.isInvalid()) return true; // Translate the parser's template argument list in our AST format. TemplateArgumentListInfo TemplateArgs(LAngleLoc, RAngleLoc); translateTemplateArguments(TemplateArgsIn, TemplateArgs); if (DependentTemplateName *DTN = Template.get().getAsDependentTemplateName()){ // Handle a dependent template specialization for which we cannot resolve // the template name. assert(DTN->getQualifier() == static_cast<NestedNameSpecifier*>(SS.getScopeRep())); QualType T = Context.getDependentTemplateSpecializationType(ETK_None, DTN->getQualifier(), DTN->getIdentifier(), TemplateArgs); // Create source-location information for this type. TypeLocBuilder Builder; DependentTemplateSpecializationTypeLoc SpecTL = Builder.push<DependentTemplateSpecializationTypeLoc>(T); SpecTL.setLAngleLoc(LAngleLoc); SpecTL.setRAngleLoc(RAngleLoc); SpecTL.setKeywordLoc(SourceLocation()); SpecTL.setNameLoc(TemplateNameLoc); SpecTL.setQualifierLoc(SS.getWithLocInContext(Context)); for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); SS.Extend(Context, TemplateLoc, Builder.getTypeLocInContext(Context, T), CCLoc); return false; } if (Template.get().getAsOverloadedTemplate() || isa<FunctionTemplateDecl>(Template.get().getAsTemplateDecl())) { SourceRange R(TemplateNameLoc, RAngleLoc); if (SS.getRange().isValid()) R.setBegin(SS.getRange().getBegin()); Diag(CCLoc, diag::err_non_type_template_in_nested_name_specifier) << Template.get() << R; NoteAllFoundTemplates(Template.get()); return true; } // We were able to resolve the template name to an actual template. // Build an appropriate nested-name-specifier. QualType T = CheckTemplateIdType(Template.get(), TemplateNameLoc, TemplateArgs); if (T.isNull()) return true; // Alias template specializations can produce types which are not valid // nested name specifiers. if (!T->isDependentType() && !T->getAs<TagType>()) { Diag(TemplateNameLoc, diag::err_nested_name_spec_non_tag) << T; NoteAllFoundTemplates(Template.get()); return true; } // Provide source-location information for the template specialization // type. TypeLocBuilder Builder; TemplateSpecializationTypeLoc SpecTL = Builder.push<TemplateSpecializationTypeLoc>(T); SpecTL.setLAngleLoc(LAngleLoc); SpecTL.setRAngleLoc(RAngleLoc); SpecTL.setTemplateNameLoc(TemplateNameLoc); for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) SpecTL.setArgLocInfo(I, TemplateArgs[I].getLocInfo()); SS.Extend(Context, TemplateLoc, Builder.getTypeLocInContext(Context, T), CCLoc); return false; }
/// \brief Build a new nested-name-specifier for "identifier::", as described /// by ActOnCXXNestedNameSpecifier. /// /// This routine differs only slightly from ActOnCXXNestedNameSpecifier, in /// that it contains an extra parameter \p ScopeLookupResult, which provides /// the result of name lookup within the scope of the nested-name-specifier /// that was computed at template definition time. /// /// If ErrorRecoveryLookup is true, then this call is used to improve error /// recovery. This means that it should not emit diagnostics, it should /// just return true on failure. It also means it should only return a valid /// scope if it *knows* that the result is correct. It should not return in a /// dependent context, for example. Nor will it extend \p SS with the scope /// specifier. bool Sema::BuildCXXNestedNameSpecifier(Scope *S, IdentifierInfo &Identifier, SourceLocation IdentifierLoc, SourceLocation CCLoc, QualType ObjectType, bool EnteringContext, CXXScopeSpec &SS, NamedDecl *ScopeLookupResult, bool ErrorRecoveryLookup) { LookupResult Found(*this, &Identifier, IdentifierLoc, LookupNestedNameSpecifierName); // Determine where to perform name lookup DeclContext *LookupCtx = 0; bool isDependent = false; if (!ObjectType.isNull()) { // This nested-name-specifier occurs in a member access expression, e.g., // x->B::f, and we are looking into the type of the object. assert(!SS.isSet() && "ObjectType and scope specifier cannot coexist"); LookupCtx = computeDeclContext(ObjectType); isDependent = ObjectType->isDependentType(); } else if (SS.isSet()) { // This nested-name-specifier occurs after another nested-name-specifier, // so look into the context associated with the prior nested-name-specifier. LookupCtx = computeDeclContext(SS, EnteringContext); isDependent = isDependentScopeSpecifier(SS); Found.setContextRange(SS.getRange()); } bool ObjectTypeSearchedInScope = false; if (LookupCtx) { // Perform "qualified" name lookup into the declaration context we // computed, which is either the type of the base of a member access // expression or the declaration context associated with a prior // nested-name-specifier. // The declaration context must be complete. if (!LookupCtx->isDependentContext() && RequireCompleteDeclContext(SS, LookupCtx)) return true; LookupQualifiedName(Found, LookupCtx); if (!ObjectType.isNull() && Found.empty()) { // C++ [basic.lookup.classref]p4: // If the id-expression in a class member access is a qualified-id of // the form // // class-name-or-namespace-name::... // // the class-name-or-namespace-name following the . or -> operator is // looked up both in the context of the entire postfix-expression and in // the scope of the class of the object expression. If the name is found // only in the scope of the class of the object expression, the name // shall refer to a class-name. If the name is found only in the // context of the entire postfix-expression, the name shall refer to a // class-name or namespace-name. [...] // // Qualified name lookup into a class will not find a namespace-name, // so we do not need to diagnose that case specifically. However, // this qualified name lookup may find nothing. In that case, perform // unqualified name lookup in the given scope (if available) or // reconstruct the result from when name lookup was performed at template // definition time. if (S) LookupName(Found, S); else if (ScopeLookupResult) Found.addDecl(ScopeLookupResult); ObjectTypeSearchedInScope = true; } } else if (!isDependent) { // Perform unqualified name lookup in the current scope. LookupName(Found, S); } // If we performed lookup into a dependent context and did not find anything, // that's fine: just build a dependent nested-name-specifier. if (Found.empty() && isDependent && !(LookupCtx && LookupCtx->isRecord() && (!cast<CXXRecordDecl>(LookupCtx)->hasDefinition() || !cast<CXXRecordDecl>(LookupCtx)->hasAnyDependentBases()))) { // Don't speculate if we're just trying to improve error recovery. if (ErrorRecoveryLookup) return true; // We were not able to compute the declaration context for a dependent // base object type or prior nested-name-specifier, so this // nested-name-specifier refers to an unknown specialization. Just build // a dependent nested-name-specifier. SS.Extend(Context, &Identifier, IdentifierLoc, CCLoc); return false; } // FIXME: Deal with ambiguities cleanly. if (Found.empty() && !ErrorRecoveryLookup) { // We haven't found anything, and we're not recovering from a // different kind of error, so look for typos. DeclarationName Name = Found.getLookupName(); TypoCorrection Corrected; Found.clear(); if ((Corrected = CorrectTypo(Found.getLookupNameInfo(), Found.getLookupKind(), S, &SS, LookupCtx, EnteringContext, CTC_NoKeywords)) && isAcceptableNestedNameSpecifier(Corrected.getCorrectionDecl())) { std::string CorrectedStr(Corrected.getAsString(getLangOptions())); std::string CorrectedQuotedStr(Corrected.getQuoted(getLangOptions())); if (LookupCtx) Diag(Found.getNameLoc(), diag::err_no_member_suggest) << Name << LookupCtx << CorrectedQuotedStr << SS.getRange() << FixItHint::CreateReplacement(Found.getNameLoc(), CorrectedStr); else Diag(Found.getNameLoc(), diag::err_undeclared_var_use_suggest) << Name << CorrectedQuotedStr << FixItHint::CreateReplacement(Found.getNameLoc(), CorrectedStr); if (NamedDecl *ND = Corrected.getCorrectionDecl()) { Diag(ND->getLocation(), diag::note_previous_decl) << CorrectedQuotedStr; Found.addDecl(ND); } Found.setLookupName(Corrected.getCorrection()); } else { Found.setLookupName(&Identifier); } } NamedDecl *SD = Found.getAsSingle<NamedDecl>(); if (isAcceptableNestedNameSpecifier(SD)) { if (!ObjectType.isNull() && !ObjectTypeSearchedInScope) { // C++ [basic.lookup.classref]p4: // [...] If the name is found in both contexts, the // class-name-or-namespace-name shall refer to the same entity. // // We already found the name in the scope of the object. Now, look // into the current scope (the scope of the postfix-expression) to // see if we can find the same name there. As above, if there is no // scope, reconstruct the result from the template instantiation itself. NamedDecl *OuterDecl; if (S) { LookupResult FoundOuter(*this, &Identifier, IdentifierLoc, LookupNestedNameSpecifierName); LookupName(FoundOuter, S); OuterDecl = FoundOuter.getAsSingle<NamedDecl>(); } else OuterDecl = ScopeLookupResult; if (isAcceptableNestedNameSpecifier(OuterDecl) && OuterDecl->getCanonicalDecl() != SD->getCanonicalDecl() && (!isa<TypeDecl>(OuterDecl) || !isa<TypeDecl>(SD) || !Context.hasSameType( Context.getTypeDeclType(cast<TypeDecl>(OuterDecl)), Context.getTypeDeclType(cast<TypeDecl>(SD))))) { if (ErrorRecoveryLookup) return true; Diag(IdentifierLoc, diag::err_nested_name_member_ref_lookup_ambiguous) << &Identifier; Diag(SD->getLocation(), diag::note_ambig_member_ref_object_type) << ObjectType; Diag(OuterDecl->getLocation(), diag::note_ambig_member_ref_scope); // Fall through so that we'll pick the name we found in the object // type, since that's probably what the user wanted anyway. } } // If we're just performing this lookup for error-recovery purposes, // don't extend the nested-name-specifier. Just return now. if (ErrorRecoveryLookup) return false; if (NamespaceDecl *Namespace = dyn_cast<NamespaceDecl>(SD)) { SS.Extend(Context, Namespace, IdentifierLoc, CCLoc); return false; } if (NamespaceAliasDecl *Alias = dyn_cast<NamespaceAliasDecl>(SD)) { SS.Extend(Context, Alias, IdentifierLoc, CCLoc); return false; } QualType T = Context.getTypeDeclType(cast<TypeDecl>(SD)); TypeLocBuilder TLB; if (isa<InjectedClassNameType>(T)) { InjectedClassNameTypeLoc InjectedTL = TLB.push<InjectedClassNameTypeLoc>(T); InjectedTL.setNameLoc(IdentifierLoc); } else if (isa<RecordType>(T)) { RecordTypeLoc RecordTL = TLB.push<RecordTypeLoc>(T); RecordTL.setNameLoc(IdentifierLoc); } else if (isa<TypedefType>(T)) { TypedefTypeLoc TypedefTL = TLB.push<TypedefTypeLoc>(T); TypedefTL.setNameLoc(IdentifierLoc); } else if (isa<EnumType>(T)) { EnumTypeLoc EnumTL = TLB.push<EnumTypeLoc>(T); EnumTL.setNameLoc(IdentifierLoc); } else if (isa<TemplateTypeParmType>(T)) { TemplateTypeParmTypeLoc TemplateTypeTL = TLB.push<TemplateTypeParmTypeLoc>(T); TemplateTypeTL.setNameLoc(IdentifierLoc); } else if (isa<UnresolvedUsingType>(T)) { UnresolvedUsingTypeLoc UnresolvedTL = TLB.push<UnresolvedUsingTypeLoc>(T); UnresolvedTL.setNameLoc(IdentifierLoc); } else if (isa<SubstTemplateTypeParmType>(T)) { SubstTemplateTypeParmTypeLoc TL = TLB.push<SubstTemplateTypeParmTypeLoc>(T); TL.setNameLoc(IdentifierLoc); } else if (isa<SubstTemplateTypeParmPackType>(T)) { SubstTemplateTypeParmPackTypeLoc TL = TLB.push<SubstTemplateTypeParmPackTypeLoc>(T); TL.setNameLoc(IdentifierLoc); } else { llvm_unreachable("Unhandled TypeDecl node in nested-name-specifier"); } if (T->isEnumeralType()) Diag(IdentifierLoc, diag::warn_cxx98_compat_enum_nested_name_spec); SS.Extend(Context, SourceLocation(), TLB.getTypeLocInContext(Context, T), CCLoc); return false; } // Otherwise, we have an error case. If we don't want diagnostics, just // return an error now. if (ErrorRecoveryLookup) return true; // If we didn't find anything during our lookup, try again with // ordinary name lookup, which can help us produce better error // messages. if (Found.empty()) { Found.clear(LookupOrdinaryName); LookupName(Found, S); } // In Microsoft mode, if we are within a templated function and we can't // resolve Identifier, then extend the SS with Identifier. This will have // the effect of resolving Identifier during template instantiation. // The goal is to be able to resolve a function call whose // nested-name-specifier is located inside a dependent base class. // Example: // // class C { // public: // static void foo2() { } // }; // template <class T> class A { public: typedef C D; }; // // template <class T> class B : public A<T> { // public: // void foo() { D::foo2(); } // }; if (getLangOptions().MicrosoftExt) { DeclContext *DC = LookupCtx ? LookupCtx : CurContext; if (DC->isDependentContext() && DC->isFunctionOrMethod()) { SS.Extend(Context, &Identifier, IdentifierLoc, CCLoc); return false; } } unsigned DiagID; if (!Found.empty()) DiagID = diag::err_expected_class_or_namespace; else if (SS.isSet()) { Diag(IdentifierLoc, diag::err_no_member) << &Identifier << LookupCtx << SS.getRange(); return true; } else DiagID = diag::err_undeclared_var_use; if (SS.isSet()) Diag(IdentifierLoc, DiagID) << &Identifier << SS.getRange(); else Diag(IdentifierLoc, DiagID) << &Identifier; return true; }
/// Build a new nested-name-specifier for "identifier::", as described /// by ActOnCXXNestedNameSpecifier. /// /// \param S Scope in which the nested-name-specifier occurs. /// \param IdInfo Parser information about an identifier in the /// nested-name-spec. /// \param EnteringContext If true, enter the context specified by the /// nested-name-specifier. /// \param SS Optional nested name specifier preceding the identifier. /// \param ScopeLookupResult Provides the result of name lookup within the /// scope of the nested-name-specifier that was computed at template /// definition time. /// \param ErrorRecoveryLookup Specifies if the method is called to improve /// error recovery and what kind of recovery is performed. /// \param IsCorrectedToColon If not null, suggestion of replace '::' -> ':' /// are allowed. The bool value pointed by this parameter is set to /// 'true' if the identifier is treated as if it was followed by ':', /// not '::'. /// \param OnlyNamespace If true, only considers namespaces in lookup. /// /// This routine differs only slightly from ActOnCXXNestedNameSpecifier, in /// that it contains an extra parameter \p ScopeLookupResult, which provides /// the result of name lookup within the scope of the nested-name-specifier /// that was computed at template definition time. /// /// If ErrorRecoveryLookup is true, then this call is used to improve error /// recovery. This means that it should not emit diagnostics, it should /// just return true on failure. It also means it should only return a valid /// scope if it *knows* that the result is correct. It should not return in a /// dependent context, for example. Nor will it extend \p SS with the scope /// specifier. bool Sema::BuildCXXNestedNameSpecifier(Scope *S, NestedNameSpecInfo &IdInfo, bool EnteringContext, CXXScopeSpec &SS, NamedDecl *ScopeLookupResult, bool ErrorRecoveryLookup, bool *IsCorrectedToColon, bool OnlyNamespace) { if (IdInfo.Identifier->isEditorPlaceholder()) return true; LookupResult Found(*this, IdInfo.Identifier, IdInfo.IdentifierLoc, OnlyNamespace ? LookupNamespaceName : LookupNestedNameSpecifierName); QualType ObjectType = GetTypeFromParser(IdInfo.ObjectType); // Determine where to perform name lookup DeclContext *LookupCtx = nullptr; bool isDependent = false; if (IsCorrectedToColon) *IsCorrectedToColon = false; if (!ObjectType.isNull()) { // This nested-name-specifier occurs in a member access expression, e.g., // x->B::f, and we are looking into the type of the object. assert(!SS.isSet() && "ObjectType and scope specifier cannot coexist"); LookupCtx = computeDeclContext(ObjectType); isDependent = ObjectType->isDependentType(); } else if (SS.isSet()) { // This nested-name-specifier occurs after another nested-name-specifier, // so look into the context associated with the prior nested-name-specifier. LookupCtx = computeDeclContext(SS, EnteringContext); isDependent = isDependentScopeSpecifier(SS); Found.setContextRange(SS.getRange()); } bool ObjectTypeSearchedInScope = false; if (LookupCtx) { // Perform "qualified" name lookup into the declaration context we // computed, which is either the type of the base of a member access // expression or the declaration context associated with a prior // nested-name-specifier. // The declaration context must be complete. if (!LookupCtx->isDependentContext() && RequireCompleteDeclContext(SS, LookupCtx)) return true; LookupQualifiedName(Found, LookupCtx); if (!ObjectType.isNull() && Found.empty()) { // C++ [basic.lookup.classref]p4: // If the id-expression in a class member access is a qualified-id of // the form // // class-name-or-namespace-name::... // // the class-name-or-namespace-name following the . or -> operator is // looked up both in the context of the entire postfix-expression and in // the scope of the class of the object expression. If the name is found // only in the scope of the class of the object expression, the name // shall refer to a class-name. If the name is found only in the // context of the entire postfix-expression, the name shall refer to a // class-name or namespace-name. [...] // // Qualified name lookup into a class will not find a namespace-name, // so we do not need to diagnose that case specifically. However, // this qualified name lookup may find nothing. In that case, perform // unqualified name lookup in the given scope (if available) or // reconstruct the result from when name lookup was performed at template // definition time. if (S) LookupName(Found, S); else if (ScopeLookupResult) Found.addDecl(ScopeLookupResult); ObjectTypeSearchedInScope = true; } } else if (!isDependent) { // Perform unqualified name lookup in the current scope. LookupName(Found, S); } if (Found.isAmbiguous()) return true; // If we performed lookup into a dependent context and did not find anything, // that's fine: just build a dependent nested-name-specifier. if (Found.empty() && isDependent && !(LookupCtx && LookupCtx->isRecord() && (!cast<CXXRecordDecl>(LookupCtx)->hasDefinition() || !cast<CXXRecordDecl>(LookupCtx)->hasAnyDependentBases()))) { // Don't speculate if we're just trying to improve error recovery. if (ErrorRecoveryLookup) return true; // We were not able to compute the declaration context for a dependent // base object type or prior nested-name-specifier, so this // nested-name-specifier refers to an unknown specialization. Just build // a dependent nested-name-specifier. SS.Extend(Context, IdInfo.Identifier, IdInfo.IdentifierLoc, IdInfo.CCLoc); return false; } if (Found.empty() && !ErrorRecoveryLookup) { // If identifier is not found as class-name-or-namespace-name, but is found // as other entity, don't look for typos. LookupResult R(*this, Found.getLookupNameInfo(), LookupOrdinaryName); if (LookupCtx) LookupQualifiedName(R, LookupCtx); else if (S && !isDependent) LookupName(R, S); if (!R.empty()) { // Don't diagnose problems with this speculative lookup. R.suppressDiagnostics(); // The identifier is found in ordinary lookup. If correction to colon is // allowed, suggest replacement to ':'. if (IsCorrectedToColon) { *IsCorrectedToColon = true; Diag(IdInfo.CCLoc, diag::err_nested_name_spec_is_not_class) << IdInfo.Identifier << getLangOpts().CPlusPlus << FixItHint::CreateReplacement(IdInfo.CCLoc, ":"); if (NamedDecl *ND = R.getAsSingle<NamedDecl>()) Diag(ND->getLocation(), diag::note_declared_at); return true; } // Replacement '::' -> ':' is not allowed, just issue respective error. Diag(R.getNameLoc(), OnlyNamespace ? unsigned(diag::err_expected_namespace_name) : unsigned(diag::err_expected_class_or_namespace)) << IdInfo.Identifier << getLangOpts().CPlusPlus; if (NamedDecl *ND = R.getAsSingle<NamedDecl>()) Diag(ND->getLocation(), diag::note_entity_declared_at) << IdInfo.Identifier; return true; } } if (Found.empty() && !ErrorRecoveryLookup && !getLangOpts().MSVCCompat) { // We haven't found anything, and we're not recovering from a // different kind of error, so look for typos. DeclarationName Name = Found.getLookupName(); Found.clear(); NestedNameSpecifierValidatorCCC CCC(*this); if (TypoCorrection Corrected = CorrectTypo( Found.getLookupNameInfo(), Found.getLookupKind(), S, &SS, CCC, CTK_ErrorRecovery, LookupCtx, EnteringContext)) { if (LookupCtx) { bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && Name.getAsString() == Corrected.getAsString(getLangOpts()); if (DroppedSpecifier) SS.clear(); diagnoseTypo(Corrected, PDiag(diag::err_no_member_suggest) << Name << LookupCtx << DroppedSpecifier << SS.getRange()); } else diagnoseTypo(Corrected, PDiag(diag::err_undeclared_var_use_suggest) << Name); if (Corrected.getCorrectionSpecifier()) SS.MakeTrivial(Context, Corrected.getCorrectionSpecifier(), SourceRange(Found.getNameLoc())); if (NamedDecl *ND = Corrected.getFoundDecl()) Found.addDecl(ND); Found.setLookupName(Corrected.getCorrection()); } else { Found.setLookupName(IdInfo.Identifier); } } NamedDecl *SD = Found.isSingleResult() ? Found.getRepresentativeDecl() : nullptr; bool IsExtension = false; bool AcceptSpec = isAcceptableNestedNameSpecifier(SD, &IsExtension); if (!AcceptSpec && IsExtension) { AcceptSpec = true; Diag(IdInfo.IdentifierLoc, diag::ext_nested_name_spec_is_enum); } if (AcceptSpec) { if (!ObjectType.isNull() && !ObjectTypeSearchedInScope && !getLangOpts().CPlusPlus11) { // C++03 [basic.lookup.classref]p4: // [...] If the name is found in both contexts, the // class-name-or-namespace-name shall refer to the same entity. // // We already found the name in the scope of the object. Now, look // into the current scope (the scope of the postfix-expression) to // see if we can find the same name there. As above, if there is no // scope, reconstruct the result from the template instantiation itself. // // Note that C++11 does *not* perform this redundant lookup. NamedDecl *OuterDecl; if (S) { LookupResult FoundOuter(*this, IdInfo.Identifier, IdInfo.IdentifierLoc, LookupNestedNameSpecifierName); LookupName(FoundOuter, S); OuterDecl = FoundOuter.getAsSingle<NamedDecl>(); } else OuterDecl = ScopeLookupResult; if (isAcceptableNestedNameSpecifier(OuterDecl) && OuterDecl->getCanonicalDecl() != SD->getCanonicalDecl() && (!isa<TypeDecl>(OuterDecl) || !isa<TypeDecl>(SD) || !Context.hasSameType( Context.getTypeDeclType(cast<TypeDecl>(OuterDecl)), Context.getTypeDeclType(cast<TypeDecl>(SD))))) { if (ErrorRecoveryLookup) return true; Diag(IdInfo.IdentifierLoc, diag::err_nested_name_member_ref_lookup_ambiguous) << IdInfo.Identifier; Diag(SD->getLocation(), diag::note_ambig_member_ref_object_type) << ObjectType; Diag(OuterDecl->getLocation(), diag::note_ambig_member_ref_scope); // Fall through so that we'll pick the name we found in the object // type, since that's probably what the user wanted anyway. } } if (auto *TD = dyn_cast_or_null<TypedefNameDecl>(SD)) MarkAnyDeclReferenced(TD->getLocation(), TD, /*OdrUse=*/false); // If we're just performing this lookup for error-recovery purposes, // don't extend the nested-name-specifier. Just return now. if (ErrorRecoveryLookup) return false; // The use of a nested name specifier may trigger deprecation warnings. DiagnoseUseOfDecl(SD, IdInfo.CCLoc); if (NamespaceDecl *Namespace = dyn_cast<NamespaceDecl>(SD)) { SS.Extend(Context, Namespace, IdInfo.IdentifierLoc, IdInfo.CCLoc); return false; } if (NamespaceAliasDecl *Alias = dyn_cast<NamespaceAliasDecl>(SD)) { SS.Extend(Context, Alias, IdInfo.IdentifierLoc, IdInfo.CCLoc); return false; } QualType T = Context.getTypeDeclType(cast<TypeDecl>(SD->getUnderlyingDecl())); TypeLocBuilder TLB; if (isa<InjectedClassNameType>(T)) { InjectedClassNameTypeLoc InjectedTL = TLB.push<InjectedClassNameTypeLoc>(T); InjectedTL.setNameLoc(IdInfo.IdentifierLoc); } else if (isa<RecordType>(T)) { RecordTypeLoc RecordTL = TLB.push<RecordTypeLoc>(T); RecordTL.setNameLoc(IdInfo.IdentifierLoc); } else if (isa<TypedefType>(T)) { TypedefTypeLoc TypedefTL = TLB.push<TypedefTypeLoc>(T); TypedefTL.setNameLoc(IdInfo.IdentifierLoc); } else if (isa<EnumType>(T)) { EnumTypeLoc EnumTL = TLB.push<EnumTypeLoc>(T); EnumTL.setNameLoc(IdInfo.IdentifierLoc); } else if (isa<TemplateTypeParmType>(T)) { TemplateTypeParmTypeLoc TemplateTypeTL = TLB.push<TemplateTypeParmTypeLoc>(T); TemplateTypeTL.setNameLoc(IdInfo.IdentifierLoc); } else if (isa<UnresolvedUsingType>(T)) { UnresolvedUsingTypeLoc UnresolvedTL = TLB.push<UnresolvedUsingTypeLoc>(T); UnresolvedTL.setNameLoc(IdInfo.IdentifierLoc); } else if (isa<SubstTemplateTypeParmType>(T)) { SubstTemplateTypeParmTypeLoc TL = TLB.push<SubstTemplateTypeParmTypeLoc>(T); TL.setNameLoc(IdInfo.IdentifierLoc); } else if (isa<SubstTemplateTypeParmPackType>(T)) { SubstTemplateTypeParmPackTypeLoc TL = TLB.push<SubstTemplateTypeParmPackTypeLoc>(T); TL.setNameLoc(IdInfo.IdentifierLoc); } else { llvm_unreachable("Unhandled TypeDecl node in nested-name-specifier"); } if (T->isEnumeralType()) Diag(IdInfo.IdentifierLoc, diag::warn_cxx98_compat_enum_nested_name_spec); SS.Extend(Context, SourceLocation(), TLB.getTypeLocInContext(Context, T), IdInfo.CCLoc); return false; } // Otherwise, we have an error case. If we don't want diagnostics, just // return an error now. if (ErrorRecoveryLookup) return true; // If we didn't find anything during our lookup, try again with // ordinary name lookup, which can help us produce better error // messages. if (Found.empty()) { Found.clear(LookupOrdinaryName); LookupName(Found, S); } // In Microsoft mode, if we are within a templated function and we can't // resolve Identifier, then extend the SS with Identifier. This will have // the effect of resolving Identifier during template instantiation. // The goal is to be able to resolve a function call whose // nested-name-specifier is located inside a dependent base class. // Example: // // class C { // public: // static void foo2() { } // }; // template <class T> class A { public: typedef C D; }; // // template <class T> class B : public A<T> { // public: // void foo() { D::foo2(); } // }; if (getLangOpts().MSVCCompat) { DeclContext *DC = LookupCtx ? LookupCtx : CurContext; if (DC->isDependentContext() && DC->isFunctionOrMethod()) { CXXRecordDecl *ContainingClass = dyn_cast<CXXRecordDecl>(DC->getParent()); if (ContainingClass && ContainingClass->hasAnyDependentBases()) { Diag(IdInfo.IdentifierLoc, diag::ext_undeclared_unqual_id_with_dependent_base) << IdInfo.Identifier << ContainingClass; SS.Extend(Context, IdInfo.Identifier, IdInfo.IdentifierLoc, IdInfo.CCLoc); return false; } } } if (!Found.empty()) { if (TypeDecl *TD = Found.getAsSingle<TypeDecl>()) Diag(IdInfo.IdentifierLoc, diag::err_expected_class_or_namespace) << Context.getTypeDeclType(TD) << getLangOpts().CPlusPlus; else { Diag(IdInfo.IdentifierLoc, diag::err_expected_class_or_namespace) << IdInfo.Identifier << getLangOpts().CPlusPlus; if (NamedDecl *ND = Found.getAsSingle<NamedDecl>()) Diag(ND->getLocation(), diag::note_entity_declared_at) << IdInfo.Identifier; } } else if (SS.isSet()) Diag(IdInfo.IdentifierLoc, diag::err_no_member) << IdInfo.Identifier << LookupCtx << SS.getRange(); else Diag(IdInfo.IdentifierLoc, diag::err_undeclared_var_use) << IdInfo.Identifier; return true; }
/// Require that the context specified by SS be complete. /// /// If SS refers to a type, this routine checks whether the type is /// complete enough (or can be made complete enough) for name lookup /// into the DeclContext. A type that is not yet completed can be /// considered "complete enough" if it is a class/struct/union/enum /// that is currently being defined. Or, if we have a type that names /// a class template specialization that is not a complete type, we /// will attempt to instantiate that class template. bool Sema::RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC) { assert(DC && "given null context"); TagDecl *tag = dyn_cast<TagDecl>(DC); // If this is a dependent type, then we consider it complete. // FIXME: This is wrong; we should require a (visible) definition to // exist in this case too. if (!tag || tag->isDependentContext()) return false; // Grab the tag definition, if there is one. QualType type = Context.getTypeDeclType(tag); tag = type->getAsTagDecl(); // If we're currently defining this type, then lookup into the // type is okay: don't complain that it isn't complete yet. if (tag->isBeingDefined()) return false; SourceLocation loc = SS.getLastQualifierNameLoc(); if (loc.isInvalid()) loc = SS.getRange().getBegin(); // The type must be complete. if (RequireCompleteType(loc, type, diag::err_incomplete_nested_name_spec, SS.getRange())) { SS.SetInvalid(SS.getRange()); return true; } // Fixed enum types are complete, but they aren't valid as scopes // until we see a definition, so awkwardly pull out this special // case. auto *EnumD = dyn_cast<EnumDecl>(tag); if (!EnumD) return false; if (EnumD->isCompleteDefinition()) { // If we know about the definition but it is not visible, complain. NamedDecl *SuggestedDef = nullptr; if (!hasVisibleDefinition(EnumD, &SuggestedDef, /*OnlyNeedComplete*/false)) { // If the user is going to see an error here, recover by making the // definition visible. bool TreatAsComplete = !isSFINAEContext(); diagnoseMissingImport(loc, SuggestedDef, MissingImportKind::Definition, /*Recover*/TreatAsComplete); return !TreatAsComplete; } return false; } // Try to instantiate the definition, if this is a specialization of an // enumeration temploid. if (EnumDecl *Pattern = EnumD->getInstantiatedFromMemberEnum()) { MemberSpecializationInfo *MSI = EnumD->getMemberSpecializationInfo(); if (MSI->getTemplateSpecializationKind() != TSK_ExplicitSpecialization) { if (InstantiateEnum(loc, EnumD, Pattern, getTemplateInstantiationArgs(EnumD), TSK_ImplicitInstantiation)) { SS.SetInvalid(SS.getRange()); return true; } return false; } } Diag(loc, diag::err_incomplete_nested_name_spec) << type << SS.getRange(); SS.SetInvalid(SS.getRange()); return true; }
/// \brief Require that the context specified by SS be complete. /// /// If SS refers to a type, this routine checks whether the type is /// complete enough (or can be made complete enough) for name lookup /// into the DeclContext. A type that is not yet completed can be /// considered "complete enough" if it is a class/struct/union/enum /// that is currently being defined. Or, if we have a type that names /// a class template specialization that is not a complete type, we /// will attempt to instantiate that class template. bool Sema::RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *&DC) { assert(DC && "given null context"); TagDecl *tag = dyn_cast<TagDecl>(DC); // If this is a dependent type, then we consider it complete. // FIXME: This is wrong; we should require a (visible) definition to // exist in this case too. if (!tag || tag->isDependentContext()) return false; // If we're currently defining this type, then lookup into the // type is okay: don't complain that it isn't complete yet. QualType type = Context.getTypeDeclType(tag); const TagType *tagType = type->getAs<TagType>(); if (tagType && tagType->isBeingDefined()) return false; SourceLocation loc = SS.getLastQualifierNameLoc(); if (loc.isInvalid()) loc = SS.getRange().getBegin(); // The type must be complete. if (RequireCompleteType(loc, type, diag::err_incomplete_nested_name_spec, SS.getRange())) { // The actual information about the decl may have been loaded via an // external source that created a new AST node/decl for the definition // rather than reusing the one we had (DC) like the ASTReader does. // To avoid the caller to continue using the still incomplete decl, let's // set it to the definition. DC = tag->getDefinition(); SS.SetInvalid(SS.getRange()); return true; } // Fixed enum types are complete, but they aren't valid as scopes // until we see a definition, so awkwardly pull out this special // case. const EnumType *enumType = dyn_cast_or_null<EnumType>(tagType); if (!enumType) return false; if (enumType->getDecl()->isCompleteDefinition()) { // If we know about the definition but it is not visible, complain. NamedDecl *SuggestedDef = nullptr; if (!hasVisibleDefinition(enumType->getDecl(), &SuggestedDef, /*OnlyNeedComplete*/false)) { // If the user is going to see an error here, recover by making the // definition visible. bool TreatAsComplete = !isSFINAEContext(); diagnoseMissingImport(loc, SuggestedDef, MissingImportKind::Definition, /*Recover*/TreatAsComplete); return !TreatAsComplete; } return false; } // Try to instantiate the definition, if this is a specialization of an // enumeration temploid. EnumDecl *ED = enumType->getDecl(); if (EnumDecl *Pattern = ED->getInstantiatedFromMemberEnum()) { MemberSpecializationInfo *MSI = ED->getMemberSpecializationInfo(); if (MSI->getTemplateSpecializationKind() != TSK_ExplicitSpecialization) { if (InstantiateEnum(loc, ED, Pattern, getTemplateInstantiationArgs(ED), TSK_ImplicitInstantiation)) { SS.SetInvalid(SS.getRange()); return true; } return false; } } Diag(loc, diag::err_incomplete_nested_name_spec) << type << SS.getRange(); SS.SetInvalid(SS.getRange()); return true; }
/// TryAnnotateTypeOrScopeToken - If the current token position is on a /// typename (possibly qualified in C++) or a C++ scope specifier not followed /// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens /// with a single annotation token representing the typename or C++ scope /// respectively. /// This simplifies handling of C++ scope specifiers and allows efficient /// backtracking without the need to re-parse and resolve nested-names and /// typenames. /// It will mainly be called when we expect to treat identifiers as typenames /// (if they are typenames). For example, in C we do not expect identifiers /// inside expressions to be treated as typenames so it will not be called /// for expressions in C. /// The benefit for C/ObjC is that a typename will be annotated and /// Actions.getTypeName will not be needed to be called again (e.g. getTypeName /// will not be called twice, once to check whether we have a declaration /// specifier, and another one to get the actual type inside /// ParseDeclarationSpecifiers). /// /// This returns true if the token was annotated or an unrecoverable error /// occurs. /// /// Note that this routine emits an error if you call it with ::new or ::delete /// as the current tokens, so only call it in contexts where these are invalid. bool Parser::TryAnnotateTypeOrScopeToken() { assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) || Tok.is(tok::kw_typename)) && "Cannot be a type or scope token!"); if (Tok.is(tok::kw_typename)) { // Parse a C++ typename-specifier, e.g., "typename T::type". // // typename-specifier: // 'typename' '::' [opt] nested-name-specifier identifier // 'typename' '::' [opt] nested-name-specifier template [opt] // simple-template-id SourceLocation TypenameLoc = ConsumeToken(); CXXScopeSpec SS; bool HadNestedNameSpecifier = ParseOptionalCXXScopeSpecifier(SS); if (!HadNestedNameSpecifier) { Diag(Tok.getLocation(), diag::err_expected_qualified_after_typename); return false; } TypeResult Ty; if (Tok.is(tok::identifier)) { // FIXME: check whether the next token is '<', first! Ty = Actions.ActOnTypenameType(TypenameLoc, SS, *Tok.getIdentifierInfo(), Tok.getLocation()); } else if (Tok.is(tok::annot_template_id)) { TemplateIdAnnotation *TemplateId = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); if (TemplateId->Kind == TNK_Function_template) { Diag(Tok, diag::err_typename_refers_to_non_type_template) << Tok.getAnnotationRange(); return false; } AnnotateTemplateIdTokenAsType(0); assert(Tok.is(tok::annot_typename) && "AnnotateTemplateIdTokenAsType isn't working properly"); if (Tok.getAnnotationValue()) Ty = Actions.ActOnTypenameType(TypenameLoc, SS, SourceLocation(), Tok.getAnnotationValue()); else Ty = true; } else { Diag(Tok, diag::err_expected_type_name_after_typename) << SS.getRange(); return false; } Tok.setKind(tok::annot_typename); Tok.setAnnotationValue(Ty.isInvalid()? 0 : Ty.get()); Tok.setAnnotationEndLoc(Tok.getLocation()); Tok.setLocation(TypenameLoc); PP.AnnotateCachedTokens(Tok); return true; } CXXScopeSpec SS; if (getLang().CPlusPlus) ParseOptionalCXXScopeSpecifier(SS); if (Tok.is(tok::identifier)) { // Determine whether the identifier is a type name. if (TypeTy *Ty = Actions.getTypeName(*Tok.getIdentifierInfo(), Tok.getLocation(), CurScope, &SS)) { // This is a typename. Replace the current token in-place with an // annotation type token. Tok.setKind(tok::annot_typename); Tok.setAnnotationValue(Ty); Tok.setAnnotationEndLoc(Tok.getLocation()); if (SS.isNotEmpty()) // it was a C++ qualified type name. Tok.setLocation(SS.getBeginLoc()); // In case the tokens were cached, have Preprocessor replace // them with the annotation token. PP.AnnotateCachedTokens(Tok); return true; } if (!getLang().CPlusPlus) { // If we're in C, we can't have :: tokens at all (the lexer won't return // them). If the identifier is not a type, then it can't be scope either, // just early exit. return false; } // If this is a template-id, annotate with a template-id or type token. if (NextToken().is(tok::less)) { TemplateTy Template; if (TemplateNameKind TNK = Actions.isTemplateName(*Tok.getIdentifierInfo(), CurScope, Template, &SS)) if (AnnotateTemplateIdToken(Template, TNK, &SS)) { // If an unrecoverable error occurred, we need to return true here, // because the token stream is in a damaged state. We may not return // a valid identifier. return Tok.isNot(tok::identifier); } } // The current token, which is either an identifier or a // template-id, is not part of the annotation. Fall through to // push that token back into the stream and complete the C++ scope // specifier annotation. } if (Tok.is(tok::annot_template_id)) { TemplateIdAnnotation *TemplateId = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); if (TemplateId->Kind == TNK_Type_template) { // A template-id that refers to a type was parsed into a // template-id annotation in a context where we weren't allowed // to produce a type annotation token. Update the template-id // annotation token to a type annotation token now. AnnotateTemplateIdTokenAsType(&SS); return true; } } if (SS.isEmpty()) return Tok.isNot(tok::identifier) && Tok.isNot(tok::coloncolon); // A C++ scope specifier that isn't followed by a typename. // Push the current token back into the token stream (or revert it if it is // cached) and use an annotation scope token for current token. if (PP.isBacktrackEnabled()) PP.RevertCachedTokens(1); else PP.EnterToken(Tok); Tok.setKind(tok::annot_cxxscope); Tok.setAnnotationValue(SS.getScopeRep()); Tok.setAnnotationRange(SS.getRange()); // In case the tokens were cached, have Preprocessor replace them with the // annotation token. PP.AnnotateCachedTokens(Tok); return true; }