165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali//===--- ParseTemplate.cpp - Template Parsing -----------------------------===// 265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali// 365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali// The LLVM Compiler Infrastructure 465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali// 565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali// This file is distributed under the University of Illinois Open Source 665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali// License. See LICENSE.TXT for details. 765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali// 865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali//===----------------------------------------------------------------------===// 965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali// 1065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali// This file implements parsing of C++ templates. 1165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali// 1265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali//===----------------------------------------------------------------------===// 1365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 1465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali#include "clang/Parse/Parser.h" 1565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali#include "RAIIObjectsForParser.h" 1665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali#include "clang/AST/ASTConsumer.h" 1765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali#include "clang/AST/DeclTemplate.h" 1865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali#include "clang/Parse/ParseDiagnostic.h" 1965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali#include "clang/Sema/DeclSpec.h" 2065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali#include "clang/Sema/ParsedTemplate.h" 2165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali#include "clang/Sema/Scope.h" 2265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valiusing namespace clang; 2365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 2465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Parse a template declaration, explicit instantiation, or 2565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// explicit specialization. 2665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl * 2765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseDeclarationStartingWithTemplate(unsigned Context, 2865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &DeclEnd, 2965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali AccessSpecifier AS, 3065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali AttributeList *AccessAttrs) { 3165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ObjCDeclContextSwitch ObjCDC(*this); 3265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 3365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::kw_template) && NextToken().isNot(tok::less)) { 3465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseExplicitInstantiation(Context, 3565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation(), ConsumeToken(), 3665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclEnd, AS); 3765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 3865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseTemplateDeclarationOrSpecialization(Context, DeclEnd, AS, 3965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali AccessAttrs); 4065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 4165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 4265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 4365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 4465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Parse a template declaration or an explicit specialization. 4565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 4665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// Template declarations include one or more template parameter lists 4765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// and either the function or class template declaration. Explicit 4865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// specializations contain one or more 'template < >' prefixes 4965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// followed by a (possibly templated) declaration. Since the 5065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// syntactic form of both features is nearly identical, we parse all 5165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// of the template headers together and let semantic analysis sort 5265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// the declarations from the explicit specializations. 5365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 5465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-declaration: [C++ temp] 5565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'export'[opt] 'template' '<' template-parameter-list '>' declaration 5665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 5765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// explicit-specialization: [ C++ temp.expl.spec] 5865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'template' '<' '>' declaration 5965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl * 6065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseTemplateDeclarationOrSpecialization(unsigned Context, 6165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &DeclEnd, 6265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali AccessSpecifier AS, 6365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali AttributeList *AccessAttrs) { 6465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert((Tok.is(tok::kw_export) || Tok.is(tok::kw_template)) && 6565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali "Token does not start a template declaration."); 6665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 6765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Enter template-parameter scope. 6865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseScope TemplateParmScope(this, Scope::TemplateParamScope); 6965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 7065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Tell the action that names should be checked in the context of 7165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // the declaration to come. 7265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingDeclRAIIObject 7365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingTemplateParams(*this, ParsingDeclRAIIObject::NoParent); 7465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 7565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse multiple levels of template headers within this template 7665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // parameter scope, e.g., 7765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 7865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template<typename T> 7965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template<typename U> 8065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // class A<T>::B { ... }; 8165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 8265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // We parse multiple levels non-recursively so that we can build a 8365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // single data structure containing all of the template parameter 8465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // lists to easily differentiate between the case above and: 8565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 8665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template<typename T> 8765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // class A { 8865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template<typename U> class B; 8965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // }; 9065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 9165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // In the first case, the action for declaring A<T>::B receives 9265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // both template parameter lists. In the second case, the action for 9365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // defining A<T>::B receives just the inner template parameter list 9465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // (and retrieves the outer template parameter list from its 9565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // context). 9665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool isSpecialization = true; 9765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool LastParamListWasEmpty = false; 9865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParameterLists ParamLists; 9965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth); 10065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 10165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali do { 10265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume the 'export', if any. 10365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation ExportLoc; 10465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::kw_export)) { 10565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ExportLoc = ConsumeToken(); 10665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 10765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 10865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume the 'template', which should be here. 10965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateLoc; 11065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::kw_template)) { 11165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateLoc = ConsumeToken(); 11265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 11365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_expected_template); 11465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return 0; 11565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 11665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 11765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the '<' template-parameter-list '>' 11865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation LAngleLoc, RAngleLoc; 11965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SmallVector<Decl*, 4> TemplateParams; 12065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (ParseTemplateParameters(CurTemplateDepthTracker.getDepth(), 12165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams, LAngleLoc, RAngleLoc)) { 12265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Skip until the semi-colon or a }. 12365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SkipUntil(tok::r_brace, true, true); 12465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::semi)) 12565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 12665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return 0; 12765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 12865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 12965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParamLists.push_back( 13065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnTemplateParameterList(CurTemplateDepthTracker.getDepth(), 13165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ExportLoc, 13265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateLoc, LAngleLoc, 13365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams.data(), 13465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams.size(), RAngleLoc)); 13565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 13665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!TemplateParams.empty()) { 13765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali isSpecialization = false; 13865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ++CurTemplateDepthTracker; 13965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 14065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali LastParamListWasEmpty = true; 14165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 14265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } while (Tok.is(tok::kw_export) || Tok.is(tok::kw_template)); 14365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 14465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the actual template declaration. 14565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseSingleDeclarationAfterTemplate(Context, 14665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateInfo(&ParamLists, 14765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali isSpecialization, 14865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali LastParamListWasEmpty), 14965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingTemplateParams, 15065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclEnd, AS, AccessAttrs); 15165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 15265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 15365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Parse a single declaration that declares a template, 15465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template specialization, or explicit instantiation of a template. 15565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 15665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param DeclEnd will receive the source location of the last token 15765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// within this declaration. 15865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 15965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param AS the access specifier associated with this 16065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// declaration. Will be AS_none for namespace-scope declarations. 16165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 16265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \returns the new declaration. 16365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl * 16465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseSingleDeclarationAfterTemplate( 16565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali unsigned Context, 16665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali const ParsedTemplateInfo &TemplateInfo, 16765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingDeclRAIIObject &DiagsFromTParams, 16865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &DeclEnd, 16965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali AccessSpecifier AS, 17065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali AttributeList *AccessAttrs) { 17165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert(TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate && 17265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali "Template information required"); 17365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 17465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Context == Declarator::MemberContext) { 17565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // We are parsing a member template. 17665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseCXXClassMemberDeclaration(AS, AccessAttrs, TemplateInfo, 17765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali &DiagsFromTParams); 17865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return 0; 17965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 18065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 18165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedAttributesWithRange prefixAttrs(AttrFactory); 18265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali MaybeParseCXX11Attributes(prefixAttrs); 18365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 18465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::kw_using)) 18565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseUsingDirectiveOrDeclaration(Context, TemplateInfo, DeclEnd, 18665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali prefixAttrs); 18765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 18865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the declaration specifiers, stealing any diagnostics from 18965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // the template parameters. 19065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingDeclSpec DS(*this, &DiagsFromTParams); 19165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 19265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseDeclarationSpecifiers(DS, TemplateInfo, AS, 19365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali getDeclSpecContextFromDeclaratorContext(Context)); 19465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 19565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::semi)) { 19665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ProhibitAttributes(prefixAttrs); 19765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclEnd = ConsumeToken(); 19865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Decl *Decl = Actions.ParsedFreeStandingDeclSpec( 19965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali getCurScope(), AS, DS, 20065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateInfo.TemplateParams ? *TemplateInfo.TemplateParams 20165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali : MultiTemplateParamsArg(), 20265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation); 20365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DS.complete(Decl); 20465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return Decl; 20565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 20665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 20765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Move the attributes from the prefix into the DS. 20865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) 20965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ProhibitAttributes(prefixAttrs); 21065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else 21165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DS.takeAttributesFrom(prefixAttrs); 21265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 21365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the declarator. 21465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingDeclarator DeclaratorInfo(*this, DS, (Declarator::TheContext)Context); 21565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseDeclarator(DeclaratorInfo); 21665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Error parsing the declarator? 21765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!DeclaratorInfo.hasName()) { 21865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If so, skip until the semi-colon or a }. 21965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SkipUntil(tok::r_brace, true, true); 22065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::semi)) 22165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 22265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return 0; 22365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 22465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 22565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali LateParsedAttrList LateParsedAttrs(true); 22665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (DeclaratorInfo.isFunctionDeclarator()) 22765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs); 22865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 22965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (DeclaratorInfo.isFunctionDeclarator() && 23065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali isStartOfFunctionDefinition(DeclaratorInfo)) { 23165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 23265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Recover by ignoring the 'typedef'. This was probably supposed to be 23365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // the 'typename' keyword, which we should have already suggested adding 23465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // if it's appropriate. 23565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(DS.getStorageClassSpecLoc(), diag::err_function_declared_typedef) 23665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc()); 23765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DS.ClearStorageClassSpecs(); 23865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 2397c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo 2407c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) { 2417c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo if (DeclaratorInfo.getName().getKind() != UnqualifiedId::IK_TemplateId) { 2427c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo // If the declarator-id is not a template-id, issue a diagnostic and 2437c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo // recover by ignoring the 'template' keyword. 2447c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo Diag(Tok, diag::err_template_defn_explicit_instantiation) << 0; 245ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo return ParseFunctionDefinition(DeclaratorInfo, ParsedTemplateInfo(), 246ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo &LateParsedAttrs); 2477c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo } else { 2487c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo SourceLocation LAngleLoc 2497c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc); 250ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo Diag(DeclaratorInfo.getIdentifierLoc(), 2517c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo diag::err_explicit_instantiation_with_definition) 252ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo << SourceRange(TemplateInfo.TemplateLoc) 253ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo << FixItHint::CreateInsertion(LAngleLoc, "<>"); 2547c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo 255ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo // Recover as if it were an explicit specialization. 2564985429d6f0dddbe168ec0ed4de029d56294e644Larisse Voufo TemplateParameterLists FakedParamLists; 257ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo FakedParamLists.push_back(Actions.ActOnTemplateParameterList( 258ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo 0, SourceLocation(), TemplateInfo.TemplateLoc, LAngleLoc, 0, 0, 259ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo LAngleLoc)); 2607c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo 261ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo return ParseFunctionDefinition( 262ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo DeclaratorInfo, ParsedTemplateInfo(&FakedParamLists, 263ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo /*isSpecialization=*/true, 264ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo /*LastParamListWasEmpty=*/true), 265ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo &LateParsedAttrs); 2667c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo } 2677c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo } 26865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseFunctionDefinition(DeclaratorInfo, TemplateInfo, 269ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo &LateParsedAttrs); 27065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 27165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 27265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse this declaration. 27365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Decl *ThisDecl = ParseDeclarationAfterDeclarator(DeclaratorInfo, 27465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateInfo); 27565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 27665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::comma)) { 27765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok, diag::err_multiple_template_declarators) 27865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali << (int)TemplateInfo.Kind; 27965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SkipUntil(tok::semi, true, false); 28065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ThisDecl; 28165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 28265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 28365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Eat the semi colon after the declaration. 28465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ExpectAndConsumeSemi(diag::err_expected_semi_declaration); 28565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (LateParsedAttrs.size() > 0) 28665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseLexedAttributeList(LateParsedAttrs, ThisDecl, true, false); 28765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclaratorInfo.complete(ThisDecl); 28865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ThisDecl; 28965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 29065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 29165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateParameters - Parses a template-parameter-list enclosed in 29265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// angle brackets. Depth is the depth of this template-parameter-list, which 29365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// is the number of template headers directly enclosing this template header. 29465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// TemplateParams is the current list of template parameters we're building. 29565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// The template parameter we parse will be added to this list. LAngleLoc and 29665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// RAngleLoc will receive the positions of the '<' and '>', respectively, 29765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// that enclose this template parameter list. 29865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 29965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \returns true if an error occurred, false otherwise. 30065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool Parser::ParseTemplateParameters(unsigned Depth, 30165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SmallVectorImpl<Decl*> &TemplateParams, 30265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &LAngleLoc, 30365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &RAngleLoc) { 30465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Get the template parameter list. 30565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!Tok.is(tok::less)) { 30665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_expected_less_after) << "template"; 30765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 30865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 30965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali LAngleLoc = ConsumeToken(); 31065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 31165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Try to parse the template parameter list. 31265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool Failed = false; 31365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!Tok.is(tok::greater) && !Tok.is(tok::greatergreater)) 31465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Failed = ParseTemplateParameterList(Depth, TemplateParams); 31565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 31665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::greatergreater)) { 31765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // No diagnostic required here: a template-parameter-list can only be 31865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // followed by a declaration or, for a template template parameter, the 31965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 'class' keyword. Therefore, the second '>' will be diagnosed later. 32065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // This matters for elegant diagnosis of: 32165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template<template<typename>> struct S; 32265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(tok::greater); 32365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RAngleLoc = Tok.getLocation(); 32465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(Tok.getLocation().getLocWithOffset(1)); 32565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else if (Tok.is(tok::greater)) 32665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RAngleLoc = ConsumeToken(); 32765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else if (Failed) { 32865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_expected_greater); 32965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 33065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 33165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 33265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 33365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 33465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateParameterList - Parse a template parameter list. If 33565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// the parsing fails badly (i.e., closing bracket was left out), this 33665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// will try to put the token stream in a reasonable position (closing 33765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// a statement, etc.) and return false. 33865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 33965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-parameter-list: [C++ temp] 34065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-parameter 34165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-parameter-list ',' template-parameter 34265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool 34365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseTemplateParameterList(unsigned Depth, 34465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SmallVectorImpl<Decl*> &TemplateParams) { 34565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali while (1) { 34665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Decl *TmpParam 34765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali = ParseTemplateParameter(Depth, TemplateParams.size())) { 34865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams.push_back(TmpParam); 34965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 35065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If we failed to parse a template parameter, skip until we find 35165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // a comma or closing brace. 35265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SkipUntil(tok::comma, tok::greater, tok::greatergreater, true, true); 35365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 35465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 35565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Did we find a comma or the end of the template parameter list? 35665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::comma)) { 35765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 35865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else if (Tok.is(tok::greater) || Tok.is(tok::greatergreater)) { 35965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Don't consume this... that's done by template parser. 36065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali break; 36165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 36265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Somebody probably forgot to close the template. Skip ahead and 36365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // try to get out of the expression. This error is currently 36465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // subsumed by whatever goes on in ParseTemplateParameter. 36565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_expected_comma_greater); 36665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SkipUntil(tok::comma, tok::greater, tok::greatergreater, true, true); 36765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 36865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 36965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 37065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 37165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 37265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 37365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Determine whether the parser is at the start of a template 37465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type parameter. 37565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool Parser::isStartOfTemplateTypeParameter() { 37665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::kw_class)) { 37765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // "class" may be the start of an elaborated-type-specifier or a 37865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // type-parameter. Per C++ [temp.param]p3, we prefer the type-parameter. 37965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali switch (NextToken().getKind()) { 38065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::equal: 38165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::comma: 38265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greater: 38365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greatergreater: 38465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::ellipsis: 38565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 38665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 38765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::identifier: 38865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // This may be either a type-parameter or an elaborated-type-specifier. 38965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // We have to look further. 39065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali break; 39165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 39265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali default: 39365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 39465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 39565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 39665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali switch (GetLookAheadToken(2).getKind()) { 39765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::equal: 39865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::comma: 39965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greater: 40065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greatergreater: 40165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 40265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 40365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali default: 40465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 40565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 40665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 40765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 40865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.isNot(tok::kw_typename)) 40965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 41065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 41165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // C++ [temp.param]p2: 41265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // There is no semantic difference between class and typename in a 41365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template-parameter. typename followed by an unqualified-id 41465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // names a template type parameter. typename followed by a 41565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // qualified-id denotes the type in a non-type 41665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // parameter-declaration. 41765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Token Next = NextToken(); 41865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 41965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If we have an identifier, skip over it. 42065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Next.getKind() == tok::identifier) 42165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Next = GetLookAheadToken(2); 42265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 42365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali switch (Next.getKind()) { 42465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::equal: 42565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::comma: 42665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greater: 42765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greatergreater: 42865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::ellipsis: 42965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 43065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 43165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali default: 43265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 43365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 43465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 43565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 43665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateParameter - Parse a template-parameter (C++ [temp.param]). 43765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 43865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-parameter: [C++ temp.param] 43965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type-parameter 44065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// parameter-declaration 44165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 44265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type-parameter: (see below) 44365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'class' ...[opt] identifier[opt] 44465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'class' identifier[opt] '=' type-id 44565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'typename' ...[opt] identifier[opt] 44665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'typename' identifier[opt] '=' type-id 44765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'template' '<' template-parameter-list '>' 44865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'class' ...[opt] identifier[opt] 44965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'template' '<' template-parameter-list '>' 'class' identifier[opt] 45065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// = id-expression 45165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl *Parser::ParseTemplateParameter(unsigned Depth, unsigned Position) { 45265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (isStartOfTemplateTypeParameter()) 45365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseTypeParameter(Depth, Position); 45465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 45565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::kw_template)) 45665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseTemplateTemplateParameter(Depth, Position); 45765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 45865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If it's none of the above, then it must be a parameter declaration. 45965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // NOTE: This will pick up errors in the closure of the template parameter 46065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // list (e.g., template < ; Check here to implement >> style closures. 46165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseNonTypeTemplateParameter(Depth, Position); 46265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 46365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 46465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTypeParameter - Parse a template type parameter (C++ [temp.param]). 46565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// Other kinds of template parameters are parsed in 46665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateTemplateParameter and ParseNonTypeTemplateParameter. 46765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 46865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type-parameter: [C++ temp.param] 46965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'class' ...[opt][C++0x] identifier[opt] 47065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'class' identifier[opt] '=' type-id 47165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'typename' ...[opt][C++0x] identifier[opt] 47265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'typename' identifier[opt] '=' type-id 47365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl *Parser::ParseTypeParameter(unsigned Depth, unsigned Position) { 47465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert((Tok.is(tok::kw_class) || Tok.is(tok::kw_typename)) && 47565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali "A type-parameter starts with 'class' or 'typename'"); 47665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 47765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume the 'class' or 'typename' keyword. 47865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool TypenameKeyword = Tok.is(tok::kw_typename); 47965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation KeyLoc = ConsumeToken(); 48065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 48165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Grab the ellipsis (if given). 48265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool Ellipsis = false; 48365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation EllipsisLoc; 48465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::ellipsis)) { 48565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Ellipsis = true; 48665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali EllipsisLoc = ConsumeToken(); 48765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 48865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(EllipsisLoc, 48965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali getLangOpts().CPlusPlus11 49065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ? diag::warn_cxx98_compat_variadic_templates 49165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali : diag::ext_variadic_templates); 49265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 49365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 49465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Grab the template parameter name (if given) 49565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation NameLoc; 49665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali IdentifierInfo* ParamName = 0; 49765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::identifier)) { 49865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParamName = Tok.getIdentifierInfo(); 49965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali NameLoc = ConsumeToken(); 50065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else if (Tok.is(tok::equal) || Tok.is(tok::comma) || 50165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.is(tok::greater) || Tok.is(tok::greatergreater)) { 50265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Unnamed template parameter. Don't have to do anything here, just 50365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // don't consume this token. 50465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 50565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_expected_ident); 50665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return 0; 50765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 50865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 50965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Grab a default argument (if available). 51065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before 51165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // we introduce the type parameter into the local scope. 51265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation EqualLoc; 51365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedType DefaultArg; 51465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::equal)) { 51565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali EqualLoc = ConsumeToken(); 51665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DefaultArg = ParseTypeName(/*Range=*/0, 51765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Declarator::TemplateTypeArgContext).get(); 51865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 51965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 52065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return Actions.ActOnTypeParameter(getCurScope(), TypenameKeyword, Ellipsis, 52165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali EllipsisLoc, KeyLoc, ParamName, NameLoc, 52265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Depth, Position, EqualLoc, DefaultArg); 52365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 52465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 52565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateTemplateParameter - Handle the parsing of template 52665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template parameters. 52765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 52865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type-parameter: [C++ temp.param] 52965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'template' '<' template-parameter-list '>' 'class' 53065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ...[opt] identifier[opt] 53165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'template' '<' template-parameter-list '>' 'class' identifier[opt] 53265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// = id-expression 53365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl * 53465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseTemplateTemplateParameter(unsigned Depth, unsigned Position) { 53565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert(Tok.is(tok::kw_template) && "Expected 'template' keyword"); 53665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 53765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Handle the template <...> part. 53865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateLoc = ConsumeToken(); 53965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SmallVector<Decl*,8> TemplateParams; 54065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation LAngleLoc, RAngleLoc; 54165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali { 54265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseScope TemplateParmScope(this, Scope::TemplateParamScope); 54365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (ParseTemplateParameters(Depth + 1, TemplateParams, LAngleLoc, 54465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RAngleLoc)) { 54565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return 0; 54665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 54765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 54865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 54965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Generate a meaningful error if the user forgot to put class before the 55065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // identifier, comma, or greater. Provide a fixit if the identifier, comma, 55165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // or greater appear immediately or after 'typename' or 'struct'. In the 55265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // latter case, replace the keyword with 'class'. 55365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!Tok.is(tok::kw_class)) { 55465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool Replace = Tok.is(tok::kw_typename) || Tok.is(tok::kw_struct); 55565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali const Token& Next = Replace ? NextToken() : Tok; 55665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Next.is(tok::identifier) || Next.is(tok::comma) || 55765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Next.is(tok::greater) || Next.is(tok::greatergreater) || 55865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Next.is(tok::ellipsis)) 55965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_class_on_template_template_param) 56065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali << (Replace ? FixItHint::CreateReplacement(Tok.getLocation(), "class") 56165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali : FixItHint::CreateInsertion(Tok.getLocation(), "class ")); 56265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else 56365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_class_on_template_template_param); 56465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 56565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Replace) 56665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 56765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else 56865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 56965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 57065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the ellipsis, if given. 57165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation EllipsisLoc; 57265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::ellipsis)) { 57365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali EllipsisLoc = ConsumeToken(); 57465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 57565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(EllipsisLoc, 57665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali getLangOpts().CPlusPlus11 57765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ? diag::warn_cxx98_compat_variadic_templates 57865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali : diag::ext_variadic_templates); 57965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 58065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 58165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Get the identifier, if given. 58265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation NameLoc; 58365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali IdentifierInfo* ParamName = 0; 58465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::identifier)) { 58565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParamName = Tok.getIdentifierInfo(); 58665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali NameLoc = ConsumeToken(); 58765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else if (Tok.is(tok::equal) || Tok.is(tok::comma) || 58865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.is(tok::greater) || Tok.is(tok::greatergreater)) { 58965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Unnamed template parameter. Don't have to do anything here, just 59065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // don't consume this token. 59165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 59265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_expected_ident); 59365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return 0; 59465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 59565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 59665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParameterList *ParamList = 59765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnTemplateParameterList(Depth, SourceLocation(), 59865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateLoc, LAngleLoc, 59965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams.data(), 60065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams.size(), 60165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RAngleLoc); 60265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 60365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Grab a default argument (if available). 60465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before 60565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // we introduce the template parameter into the local scope. 60665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation EqualLoc; 60765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateArgument DefaultArg; 60865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::equal)) { 60965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali EqualLoc = ConsumeToken(); 61065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DefaultArg = ParseTemplateTemplateArgument(); 61165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (DefaultArg.isInvalid()) { 61265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), 61365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali diag::err_default_template_template_parameter_not_template); 61465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SkipUntil(tok::comma, tok::greater, tok::greatergreater, true, true); 61565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 61665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 61765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 61865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return Actions.ActOnTemplateTemplateParameter(getCurScope(), TemplateLoc, 61965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParamList, EllipsisLoc, 62065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParamName, NameLoc, Depth, 62165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Position, EqualLoc, DefaultArg); 62265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 62365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 62465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseNonTypeTemplateParameter - Handle the parsing of non-type 62565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template parameters (e.g., in "template<int Size> class array;"). 62665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 62765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-parameter: 62865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ... 62965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// parameter-declaration 63065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl * 63165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseNonTypeTemplateParameter(unsigned Depth, unsigned Position) { 63265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the declaration-specifiers (i.e., the type). 63365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // FIXME: The type should probably be restricted in some way... Not all 63465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // declarators (parts of declarators?) are accepted for parameters. 63565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclSpec DS(AttrFactory); 63665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseDeclarationSpecifiers(DS); 63765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 63865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse this as a typename. 63965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Declarator ParamDecl(DS, Declarator::TemplateParamContext); 64065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseDeclarator(ParamDecl); 64165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (DS.getTypeSpecType() == DeclSpec::TST_unspecified) { 64265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_expected_template_parameter); 64365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return 0; 64465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 64565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 64665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If there is a default value, parse it. 64765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before 64865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // we introduce the template parameter into the local scope. 64965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation EqualLoc; 65065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ExprResult DefaultArg; 65165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::equal)) { 65265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali EqualLoc = ConsumeToken(); 65365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 65465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // C++ [temp.param]p15: 65565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // When parsing a default template-argument for a non-type 65665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template-parameter, the first non-nested > is taken as the 65765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // end of the template-parameter-list rather than a greater-than 65865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // operator. 65965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali GreaterThanIsOperatorScope G(GreaterThanIsOperator, false); 66065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated); 66165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 66265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DefaultArg = ParseAssignmentExpression(); 66365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (DefaultArg.isInvalid()) 66465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SkipUntil(tok::comma, tok::greater, true, true); 66565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 66665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 66765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Create the parameter. 66865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return Actions.ActOnNonTypeTemplateParameter(getCurScope(), ParamDecl, 66965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Depth, Position, EqualLoc, 67065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DefaultArg.take()); 67165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 67265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 67365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Parses a '>' at the end of a template list. 67465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 67565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// If this function encounters '>>', '>>>', '>=', or '>>=', it tries 67665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// to determine if these tokens were supposed to be a '>' followed by 67765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// '>', '>>', '>=', or '>='. It emits an appropriate diagnostic if necessary. 67865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 67965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param RAngleLoc the location of the consumed '>'. 68065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 68165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param ConsumeLastToken if true, the '>' is not consumed. 68265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool Parser::ParseGreaterThanInTemplateList(SourceLocation &RAngleLoc, 68365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool ConsumeLastToken) { 68465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // What will be left once we've consumed the '>'. 68565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali tok::TokenKind RemainingToken; 68665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali const char *ReplacementStr = "> >"; 68765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 68865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali switch (Tok.getKind()) { 68965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali default: 69065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_expected_greater); 69165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 69265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 69365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greater: 69465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Determine the location of the '>' token. Only consume this token 69565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // if the caller asked us to. 69665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RAngleLoc = Tok.getLocation(); 69765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (ConsumeLastToken) 69865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 69965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 70065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 70165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greatergreater: 70265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RemainingToken = tok::greater; 70365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali break; 70465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 70565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greatergreatergreater: 70665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RemainingToken = tok::greatergreater; 70765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali break; 70865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 70965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greaterequal: 71065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RemainingToken = tok::equal; 71165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ReplacementStr = "> ="; 71265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali break; 71365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 71465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greatergreaterequal: 71565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RemainingToken = tok::greaterequal; 71665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali break; 71765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 71865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 71965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // This template-id is terminated by a token which starts with a '>'. Outside 72065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // C++11, this is now error recovery, and in C++11, this is error recovery if 72165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // the token isn't '>>'. 72265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 72365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RAngleLoc = Tok.getLocation(); 72465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 72565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // The source range of the '>>' or '>=' at the start of the token. 72665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali CharSourceRange ReplacementRange = 72765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali CharSourceRange::getCharRange(RAngleLoc, 72865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Lexer::AdvanceToTokenCharacter(RAngleLoc, 2, PP.getSourceManager(), 72965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali getLangOpts())); 73065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 73165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // A hint to put a space between the '>>'s. In order to make the hint as 73265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // clear as possible, we include the characters either side of the space in 73365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // the replacement, rather than just inserting a space at SecondCharLoc. 73465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali FixItHint Hint1 = FixItHint::CreateReplacement(ReplacementRange, 73565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ReplacementStr); 73665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 73765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // A hint to put another space after the token, if it would otherwise be 73865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // lexed differently. 73965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali FixItHint Hint2; 74065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Token Next = NextToken(); 74165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if ((RemainingToken == tok::greater || 74265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RemainingToken == tok::greatergreater) && 74365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali (Next.is(tok::greater) || Next.is(tok::greatergreater) || 74465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Next.is(tok::greatergreatergreater) || Next.is(tok::equal) || 74565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Next.is(tok::greaterequal) || Next.is(tok::greatergreaterequal) || 74665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Next.is(tok::equalequal)) && 74765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali areTokensAdjacent(Tok, Next)) 74865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Hint2 = FixItHint::CreateInsertion(Next.getLocation(), " "); 74965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 75065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali unsigned DiagId = diag::err_two_right_angle_brackets_need_space; 75165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (getLangOpts().CPlusPlus11 && Tok.is(tok::greatergreater)) 75265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DiagId = diag::warn_cxx98_compat_two_right_angle_brackets; 75365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else if (Tok.is(tok::greaterequal)) 75465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DiagId = diag::err_right_angle_bracket_equal_needs_space; 75565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), DiagId) << Hint1 << Hint2; 75665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 75765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Strip the initial '>' from the token. 75865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (RemainingToken == tok::equal && Next.is(tok::equal) && 75965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali areTokensAdjacent(Tok, Next)) { 76065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Join two adjacent '=' tokens into one, for cases like: 76165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // void (*p)() = f<int>; 76265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // return f<int>==p; 76365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 76465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(tok::equalequal); 76565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLength(Tok.getLength() + 1); 76665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 76765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(RemainingToken); 76865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLength(Tok.getLength() - 1); 76965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 77065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(Lexer::AdvanceToTokenCharacter(RAngleLoc, 1, 77165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali PP.getSourceManager(), 77265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali getLangOpts())); 77365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 77465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!ConsumeLastToken) { 77565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Since we're not supposed to consume the '>' token, we need to push 77665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // this token and revert the current token back to the '>'. 77765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali PP.EnterToken(Tok); 77865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(tok::greater); 77965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLength(1); 78065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(RAngleLoc); 78165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 78265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 78365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 78465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 78565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 78665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Parses a template-id that after the template name has 78765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// already been parsed. 78865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 78965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// This routine takes care of parsing the enclosed template argument 79065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// list ('<' template-parameter-list [opt] '>') and placing the 79165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// results into a form that can be transferred to semantic analysis. 79265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 79365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param Template the template declaration produced by isTemplateName 79465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 79565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param TemplateNameLoc the source location of the template name 79665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 79765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param SS if non-NULL, the nested-name-specifier preceding the 79865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template name. 79965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 80065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param ConsumeLastToken if true, then we will consume the last 80165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// token that forms the template-id. Otherwise, we will leave the 80265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// last token in the stream (e.g., so that it can be replaced with an 80365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// annotation token). 80465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool 80565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseTemplateIdAfterTemplateName(TemplateTy Template, 80665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateNameLoc, 80765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali const CXXScopeSpec &SS, 80865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool ConsumeLastToken, 80965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &LAngleLoc, 81065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateArgList &TemplateArgs, 81165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &RAngleLoc) { 81265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert(Tok.is(tok::less) && "Must have already parsed the template-name"); 81365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 81465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume the '<'. 81565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali LAngleLoc = ConsumeToken(); 81665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 81765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the optional template-argument-list. 81865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool Invalid = false; 81965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali { 82065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali GreaterThanIsOperatorScope G(GreaterThanIsOperator, false); 82165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.isNot(tok::greater) && Tok.isNot(tok::greatergreater)) 82265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Invalid = ParseTemplateArgumentList(TemplateArgs); 82365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 82465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Invalid) { 82565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Try to find the closing '>'. 82665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SkipUntil(tok::greater, true, !ConsumeLastToken); 82765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 82865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 82965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 83065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 83165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 83265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseGreaterThanInTemplateList(RAngleLoc, ConsumeLastToken); 83365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 83465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 83565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Replace the tokens that form a simple-template-id with an 83665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// annotation token containing the complete template-id. 83765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 83865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// The first token in the stream must be the name of a template that 83965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// is followed by a '<'. This routine will parse the complete 84065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// simple-template-id and replace the tokens with a single annotation 84165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// token with one of two different kinds: if the template-id names a 84265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type (and \p AllowTypeAnnotation is true), the annotation token is 84365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// a type annotation that includes the optional nested-name-specifier 84465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// (\p SS). Otherwise, the annotation token is a template-id 84565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// annotation that does not include the optional 84665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// nested-name-specifier. 84765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 84865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param Template the declaration of the template named by the first 84965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// token (an identifier), as returned from \c Action::isTemplateName(). 85065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 85165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param TNK the kind of template that \p Template 85265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// refers to, as returned from \c Action::isTemplateName(). 85365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 85465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param SS if non-NULL, the nested-name-specifier that precedes 85565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// this template name. 85665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 85765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param TemplateKWLoc if valid, specifies that this template-id 85865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// annotation was preceded by the 'template' keyword and gives the 85965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// location of that keyword. If invalid (the default), then this 86065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-id was not preceded by a 'template' keyword. 86165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 86265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param AllowTypeAnnotation if true (the default), then a 86365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// simple-template-id that refers to a class template, template 86465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template parameter, or other template that produces a type will be 86565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// replaced with a type annotation token. Otherwise, the 86665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// simple-template-id is always replaced with a template-id 86765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// annotation token. 86865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 86965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// If an unrecoverable parse error occurs and no annotation token can be 87065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// formed, this function returns true. 87165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 87265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool Parser::AnnotateTemplateIdToken(TemplateTy Template, TemplateNameKind TNK, 87365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali CXXScopeSpec &SS, 87465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateKWLoc, 87565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali UnqualifiedId &TemplateName, 87665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool AllowTypeAnnotation) { 87765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert(getLangOpts().CPlusPlus && "Can only annotate template-ids in C++"); 87865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert(Template && Tok.is(tok::less) && 87965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali "Parser isn't at the beginning of a template-id"); 88065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 88165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume the template-name. 88265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateNameLoc = TemplateName.getSourceRange().getBegin(); 88365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 88465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the enclosed template argument list. 88565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation LAngleLoc, RAngleLoc; 88665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateArgList TemplateArgs; 88765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool Invalid = ParseTemplateIdAfterTemplateName(Template, 88865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateNameLoc, 88965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SS, false, LAngleLoc, 89065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateArgs, 89165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RAngleLoc); 89265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 89365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Invalid) { 89465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If we failed to parse the template ID but skipped ahead to a >, we're not 89565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // going to be able to form a token annotation. Eat the '>' if present. 89665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::greater)) 89765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 89865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 89965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 90065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 90165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ASTTemplateArgsPtr TemplateArgsPtr(TemplateArgs); 90265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 90365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Build the annotation token. 90465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TNK == TNK_Type_template && AllowTypeAnnotation) { 90565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TypeResult Type 90665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali = Actions.ActOnTemplateIdType(SS, TemplateKWLoc, 90765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Template, TemplateNameLoc, 90865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali LAngleLoc, TemplateArgsPtr, RAngleLoc); 90965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Type.isInvalid()) { 91065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If we failed to parse the template ID but skipped ahead to a >, we're not 91165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // going to be able to form a token annotation. Eat the '>' if present. 91265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::greater)) 91365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 91465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 91565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 91665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 91765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(tok::annot_typename); 91865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali setTypeAnnotation(Tok, Type.get()); 91965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (SS.isNotEmpty()) 92065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(SS.getBeginLoc()); 92165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else if (TemplateKWLoc.isValid()) 92265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(TemplateKWLoc); 92365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else 92465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(TemplateNameLoc); 92565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 92665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Build a template-id annotation token that can be processed 92765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // later. 92865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(tok::annot_template_id); 92965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateIdAnnotation *TemplateId 93065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali = TemplateIdAnnotation::Allocate(TemplateArgs.size(), TemplateIds); 93165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->TemplateNameLoc = TemplateNameLoc; 93265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TemplateName.getKind() == UnqualifiedId::IK_Identifier) { 93365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Name = TemplateName.Identifier; 93465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Operator = OO_None; 93565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 93665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Name = 0; 93765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Operator = TemplateName.OperatorFunctionId.Operator; 93865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 93965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->SS = SS; 94065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->TemplateKWLoc = TemplateKWLoc; 94165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Template = Template; 94265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Kind = TNK; 94365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->LAngleLoc = LAngleLoc; 94465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->RAngleLoc = RAngleLoc; 94565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateArgument *Args = TemplateId->getTemplateArgs(); 94665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali for (unsigned Arg = 0, ArgEnd = TemplateArgs.size(); Arg != ArgEnd; ++Arg) 94765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Args[Arg] = ParsedTemplateArgument(TemplateArgs[Arg]); 94865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setAnnotationValue(TemplateId); 94965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TemplateKWLoc.isValid()) 95065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(TemplateKWLoc); 95165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else 95265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(TemplateNameLoc); 95365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 95465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 95565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Common fields for the annotation token 95665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setAnnotationEndLoc(RAngleLoc); 95765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 95865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // In case the tokens were cached, have Preprocessor replace them with the 95965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // annotation token. 96065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali PP.AnnotateCachedTokens(Tok); 96165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 96265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 96365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 96465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Replaces a template-id annotation token with a type 96565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// annotation token. 96665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 96765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// If there was a failure when forming the type from the template-id, 96865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// a type annotation token will still be created, but will have a 96965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// NULL type pointer to signify an error. 97065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valivoid Parser::AnnotateTemplateIdTokenAsType() { 97165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert(Tok.is(tok::annot_template_id) && "Requires template-id tokens"); 97265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 97365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); 97465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert((TemplateId->Kind == TNK_Type_template || 97565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Kind == TNK_Dependent_template_name) && 97665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali "Only works for type and dependent templates"); 97765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 97865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(), 97965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->NumArgs); 98065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 98165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TypeResult Type 98265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali = Actions.ActOnTemplateIdType(TemplateId->SS, 98365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->TemplateKWLoc, 98465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Template, 98565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->TemplateNameLoc, 98665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->LAngleLoc, 98765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateArgsPtr, 98865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->RAngleLoc); 98965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Create the new "type" annotation token. 99065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(tok::annot_typename); 99165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali setTypeAnnotation(Tok, Type.isInvalid() ? ParsedType() : Type.get()); 99265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TemplateId->SS.isNotEmpty()) // it was a C++ qualified type name. 99365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(TemplateId->SS.getBeginLoc()); 99465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // End location stays the same 99565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 99665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Replace the template-id annotation token, and possible the scope-specifier 99765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // that precedes it, with the typename annotation token. 99865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali PP.AnnotateCachedTokens(Tok); 99965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 100065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 100165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Determine whether the given token can end a template argument. 100265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valistatic bool isEndOfTemplateArgument(Token Tok) { 100365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return Tok.is(tok::comma) || Tok.is(tok::greater) || 100465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.is(tok::greatergreater); 100565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 100665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 100765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Parse a C++ template template argument. 100865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParsedTemplateArgument Parser::ParseTemplateTemplateArgument() { 100965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!Tok.is(tok::identifier) && !Tok.is(tok::coloncolon) && 101065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali !Tok.is(tok::annot_cxxscope)) 101165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParsedTemplateArgument(); 101265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 101365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // C++0x [temp.arg.template]p1: 101465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // A template-argument for a template template-parameter shall be the name 101565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // of a class template or an alias template, expressed as id-expression. 101665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 101765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // We parse an id-expression that refers to a class template or alias 101865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template. The grammar we parse is: 101965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 102065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // nested-name-specifier[opt] template[opt] identifier ...[opt] 102165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 102265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // followed by a token that terminates a template argument, such as ',', 102365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // '>', or (in some cases) '>>'. 102465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali CXXScopeSpec SS; // nested-name-specifier, if present 102565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseOptionalCXXScopeSpecifier(SS, ParsedType(), 102665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali /*EnteringContext=*/false); 102765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 102865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateArgument Result; 102965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation EllipsisLoc; 103065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (SS.isSet() && Tok.is(tok::kw_template)) { 103165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the optional 'template' keyword following the 103265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // nested-name-specifier. 103365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateKWLoc = ConsumeToken(); 103465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 103565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::identifier)) { 103665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // We appear to have a dependent template name. 103765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali UnqualifiedId Name; 103865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 103965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); // the identifier 104065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 104165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the ellipsis. 104265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::ellipsis)) 104365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali EllipsisLoc = ConsumeToken(); 104465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 104565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If the next token signals the end of a template argument, 104665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // then we have a dependent template name that could be a template 104765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template argument. 104865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateTy Template; 104965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (isEndOfTemplateArgument(Tok) && 105065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnDependentTemplateName(getCurScope(), 105165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SS, TemplateKWLoc, Name, 105265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali /*ObjectType=*/ ParsedType(), 105365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali /*EnteringContext=*/false, 105465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Template)) 105565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Result = ParsedTemplateArgument(SS, Template, Name.StartLocation); 105665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 105765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else if (Tok.is(tok::identifier)) { 105865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // We may have a (non-dependent) template name. 105965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateTy Template; 106065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali UnqualifiedId Name; 106165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 106265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); // the identifier 106365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 106465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the ellipsis. 106565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::ellipsis)) 106665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali EllipsisLoc = ConsumeToken(); 106765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 106865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (isEndOfTemplateArgument(Tok)) { 106965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool MemberOfUnknownSpecialization; 107065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateNameKind TNK = Actions.isTemplateName(getCurScope(), SS, 107165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali /*hasTemplateKeyword=*/false, 107265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Name, 107365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali /*ObjectType=*/ ParsedType(), 107465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali /*EnteringContext=*/false, 107565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Template, 107665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali MemberOfUnknownSpecialization); 107765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TNK == TNK_Dependent_template_name || TNK == TNK_Type_template) { 107865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // We have an id-expression that refers to a class template or 107965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // (C++0x) alias template. 108065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Result = ParsedTemplateArgument(SS, Template, Name.StartLocation); 108165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 108265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 108365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 108465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 108565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If this is a pack expansion, build it as such. 108665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (EllipsisLoc.isValid() && !Result.isInvalid()) 108765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Result = Actions.ActOnPackExpansion(Result, EllipsisLoc); 108865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 108965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return Result; 109065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 109165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 109265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateArgument - Parse a C++ template argument (C++ [temp.names]). 109365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 109465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-argument: [C++ 14.2] 109565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// constant-expression 109665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type-id 109765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// id-expression 109865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParsedTemplateArgument Parser::ParseTemplateArgument() { 109965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // C++ [temp.arg]p2: 110065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // In a template-argument, an ambiguity between a type-id and an 110165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // expression is resolved to a type-id, regardless of the form of 110265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // the corresponding template-parameter. 110365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 110465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Therefore, we initially try to parse a type-id. 110565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (isCXXTypeId(TypeIdAsTemplateArgument)) { 110665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation Loc = Tok.getLocation(); 110765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TypeResult TypeArg = ParseTypeName(/*Range=*/0, 110865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Declarator::TemplateTypeArgContext); 110965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TypeArg.isInvalid()) 111065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParsedTemplateArgument(); 111165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 111265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParsedTemplateArgument(ParsedTemplateArgument::Type, 111365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TypeArg.get().getAsOpaquePtr(), 111465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Loc); 111565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 111665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 111765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Try to parse a template template argument. 111865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali { 111965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TentativeParsingAction TPA(*this); 112065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 112165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateArgument TemplateTemplateArgument 112265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali = ParseTemplateTemplateArgument(); 112365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!TemplateTemplateArgument.isInvalid()) { 112465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TPA.Commit(); 112565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return TemplateTemplateArgument; 112665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 112765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 112865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Revert this tentative parse to parse a non-type template argument. 112965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TPA.Revert(); 113065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 113165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 113265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse a non-type template argument. 113365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation Loc = Tok.getLocation(); 113465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ExprResult ExprArg = ParseConstantExpression(MaybeTypeCast); 113565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (ExprArg.isInvalid() || !ExprArg.get()) 113665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParsedTemplateArgument(); 113765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 113865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParsedTemplateArgument(ParsedTemplateArgument::NonType, 113965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ExprArg.release(), Loc); 114065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 114165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 114265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Determine whether the current tokens can only be parsed as a 114365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template argument list (starting with the '<') and never as a '<' 114465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// expression. 114565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool Parser::IsTemplateArgumentList(unsigned Skip) { 114665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali struct AlwaysRevertAction : TentativeParsingAction { 114765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali AlwaysRevertAction(Parser &P) : TentativeParsingAction(P) { } 114865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ~AlwaysRevertAction() { Revert(); } 114965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } Tentative(*this); 115065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 115165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali while (Skip) { 115265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 115365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali --Skip; 115465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 115565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 115665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // '<' 115765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!Tok.is(tok::less)) 115865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 115965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 116065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 116165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // An empty template argument list. 116265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::greater)) 116365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 116465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 116565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // See whether we have declaration specifiers, which indicate a type. 116665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali while (isCXXDeclarationSpecifier() == TPResult::True()) 116765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 116865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 116965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If we have a '>' or a ',' then this is a template argument list. 117065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return Tok.is(tok::greater) || Tok.is(tok::comma); 117165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 117265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 117365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateArgumentList - Parse a C++ template-argument-list 117465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// (C++ [temp.names]). Returns true if there was an error. 117565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 117665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-argument-list: [C++ 14.2] 117765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-argument 117865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-argument-list ',' template-argument 117965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool 118065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseTemplateArgumentList(TemplateArgList &TemplateArgs) { 118165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Template argument lists are constant-evaluation contexts. 118265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali EnterExpressionEvaluationContext EvalContext(Actions,Sema::ConstantEvaluated); 118365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 118465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali while (true) { 118565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateArgument Arg = ParseTemplateArgument(); 118665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::ellipsis)) { 118765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation EllipsisLoc = ConsumeToken(); 118865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Arg = Actions.ActOnPackExpansion(Arg, EllipsisLoc); 118965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 119065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 119165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Arg.isInvalid()) { 119265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SkipUntil(tok::comma, tok::greater, true, true); 119365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 119465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 119565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 119665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Save this template argument. 119765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateArgs.push_back(Arg); 119865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 119965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If the next token is a comma, consume it and keep reading 120065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // arguments. 120165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.isNot(tok::comma)) break; 120265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 120365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume the comma. 120465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 120565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 120665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 120765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 120865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 120965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 121065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Parse a C++ explicit template instantiation 121165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// (C++ [temp.explicit]). 121265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 121365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// explicit-instantiation: 121465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'extern' [opt] 'template' declaration 121565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 121665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// Note that the 'extern' is a GNU extension and C++11 feature. 121765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl *Parser::ParseExplicitInstantiation(unsigned Context, 121865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation ExternLoc, 121965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateLoc, 122065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &DeclEnd, 122165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali AccessSpecifier AS) { 122265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // This isn't really required here. 122365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingDeclRAIIObject 122465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingTemplateParams(*this, ParsingDeclRAIIObject::NoParent); 122565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 122665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseSingleDeclarationAfterTemplate(Context, 122765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateInfo(ExternLoc, 122865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateLoc), 122965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingTemplateParams, 123065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclEnd, AS); 123165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 123265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 123365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiSourceRange Parser::ParsedTemplateInfo::getSourceRange() const { 123465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TemplateParams) 123565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return getTemplateParamsRange(TemplateParams->data(), 123665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams->size()); 123765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 123865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceRange R(TemplateLoc); 123965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (ExternLoc.isValid()) 124065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali R.setBegin(ExternLoc); 124165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return R; 124265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 124365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 124465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valivoid Parser::LateTemplateParserCallback(void *P, const FunctionDecl *FD) { 124565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ((Parser*)P)->LateTemplateParser(FD); 124665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 124765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 124865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 124965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valivoid Parser::LateTemplateParser(const FunctionDecl *FD) { 125065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali LateParsedTemplatedFunction *LPT = LateParsedTemplateMap[FD]; 125165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (LPT) { 125265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseLateTemplatedFuncDef(*LPT); 125365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return; 125465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 125565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 125665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali llvm_unreachable("Late templated function without associated lexed tokens"); 125765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 125865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 125965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Late parse a C++ function template in Microsoft mode. 126065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valivoid Parser::ParseLateTemplatedFuncDef(LateParsedTemplatedFunction &LMT) { 126165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if(!LMT.D) 126265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return; 126365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 126465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Get the FunctionDecl. 126565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali FunctionTemplateDecl *FunTmplD = dyn_cast<FunctionTemplateDecl>(LMT.D); 126665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali FunctionDecl *FunD = 126765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali FunTmplD ? FunTmplD->getTemplatedDecl() : cast<FunctionDecl>(LMT.D); 126865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Track template parameter depth. 126965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth); 127065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 127165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // To restore the context after late parsing. 127265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Sema::ContextRAII GlobalSavedContext(Actions, Actions.CurContext); 127365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 127465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SmallVector<ParseScope*, 4> TemplateParamScopeStack; 127565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 127665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Get the list of DeclContexts to reenter. 127765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SmallVector<DeclContext*, 4> DeclContextsToReenter; 127865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclContext *DD = FunD->getLexicalParent(); 127965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali while (DD && !DD->isTranslationUnit()) { 128065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclContextsToReenter.push_back(DD); 128165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DD = DD->getLexicalParent(); 128265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 128365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 128465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Reenter template scopes from outermost to innermost. 1285163fbf810eaffc2c7b0170d91b6196b032911957Craig Topper SmallVectorImpl<DeclContext *>::reverse_iterator II = 128665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclContextsToReenter.rbegin(); 128765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali for (; II != DeclContextsToReenter.rend(); ++II) { 128865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (ClassTemplatePartialSpecializationDecl *MD = 128965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali dyn_cast_or_null<ClassTemplatePartialSpecializationDecl>(*II)) { 129065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParamScopeStack.push_back( 129165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali new ParseScope(this, Scope::TemplateParamScope)); 129265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnReenterTemplateScope(getCurScope(), MD); 129365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ++CurTemplateDepthTracker; 129465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else if (CXXRecordDecl *MD = dyn_cast_or_null<CXXRecordDecl>(*II)) { 1295688f9866c7d35725c947b080fb17055446912390Faisal Vali bool IsClassTemplate = MD->getDescribedClassTemplate() != 0; 129665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParamScopeStack.push_back( 1297688f9866c7d35725c947b080fb17055446912390Faisal Vali new ParseScope(this, Scope::TemplateParamScope, 1298688f9866c7d35725c947b080fb17055446912390Faisal Vali /*ManageScope*/IsClassTemplate)); 129965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnReenterTemplateScope(getCurScope(), 130065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali MD->getDescribedClassTemplate()); 1301688f9866c7d35725c947b080fb17055446912390Faisal Vali if (IsClassTemplate) 1302688f9866c7d35725c947b080fb17055446912390Faisal Vali ++CurTemplateDepthTracker; 130365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 130465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParamScopeStack.push_back(new ParseScope(this, Scope::DeclScope)); 130565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.PushDeclContext(Actions.getCurScope(), *II); 130665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 130765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParamScopeStack.push_back( 130865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali new ParseScope(this, Scope::TemplateParamScope)); 130965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 131065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclaratorDecl *Declarator = dyn_cast<DeclaratorDecl>(FunD); 131165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Declarator && Declarator->getNumTemplateParameterLists() != 0) { 131265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnReenterDeclaratorTemplateScope(getCurScope(), Declarator); 131365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ++CurTemplateDepthTracker; 131465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 131565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnReenterTemplateScope(getCurScope(), LMT.D); 131665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ++CurTemplateDepthTracker; 131765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 131865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert(!LMT.Toks.empty() && "Empty body!"); 131965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 132065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Append the current token at the end of the new token stream so that it 132165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // doesn't get lost. 132265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali LMT.Toks.push_back(Tok); 132365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali PP.EnterTokenStream(LMT.Toks.data(), LMT.Toks.size(), true, false); 132465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 132565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume the previously pushed token. 132665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true); 132765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert((Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try)) 132865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali && "Inline method not starting with '{', ':' or 'try'"); 132965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 133065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the method body. Function body parsing code is similar enough 133165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // to be re-used for method bodies as well. 133265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope); 133365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 133465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Recreate the containing function DeclContext. 133565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Sema::ContextRAII FunctionSavedContext(Actions, Actions.getContainingDC(FunD)); 133665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 133765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnStartOfFunctionDef(getCurScope(), FunD); 133865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 133965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::kw_try)) { 134065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseFunctionTryBlock(LMT.D, FnScope); 134165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 134265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::colon)) 134365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseConstructorInitializer(LMT.D); 134465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else 134565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnDefaultCtorInitializers(LMT.D); 134665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 134765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::l_brace)) { 134865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert((!FunTmplD || FunTmplD->getTemplateParameters()->getDepth() < 134965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParameterDepth) && 135065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali "TemplateParameterDepth should be greater than the depth of " 135165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali "current template being instantiated!"); 135265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseFunctionStatementBody(LMT.D, FnScope); 135365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.MarkAsLateParsedTemplate(FunD, false); 135465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else 135565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnFinishFunctionBody(LMT.D, 0); 135665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 135765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 135865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Exit scopes. 135965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali FnScope.Exit(); 1360163fbf810eaffc2c7b0170d91b6196b032911957Craig Topper SmallVectorImpl<ParseScope *>::reverse_iterator I = 136165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParamScopeStack.rbegin(); 136265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali for (; I != TemplateParamScopeStack.rend(); ++I) 136365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali delete *I; 136465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 136565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclGroupPtrTy grp = Actions.ConvertDeclToDeclGroup(LMT.D); 136665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (grp) 136765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.getASTConsumer().HandleTopLevelDecl(grp.get()); 136865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 136965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 137065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Lex a delayed template function for late parsing. 137165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valivoid Parser::LexTemplateFunctionForLateParsing(CachedTokens &Toks) { 137265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali tok::TokenKind kind = Tok.getKind(); 137365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!ConsumeAndStoreFunctionPrologue(Toks)) { 137465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume everything up to (and including) the matching right brace. 137565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false); 137665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 137765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 137865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If we're in a function-try-block, we need to store all the catch blocks. 137965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (kind == tok::kw_try) { 138065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali while (Tok.is(tok::kw_catch)) { 138165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false); 138265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false); 138365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 138465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 138565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 1386