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; 104651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines TryConsumeToken(tok::kw_export, ExportLoc); 10565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 10665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume the 'template', which should be here. 10765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateLoc; 108651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (!TryConsumeToken(tok::kw_template, TemplateLoc)) { 10965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_expected_template); 1106bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return nullptr; 11165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 11265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 11365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the '<' template-parameter-list '>' 11465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation LAngleLoc, RAngleLoc; 11565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SmallVector<Decl*, 4> TemplateParams; 11665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (ParseTemplateParameters(CurTemplateDepthTracker.getDepth(), 11765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams, LAngleLoc, RAngleLoc)) { 11865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Skip until the semi-colon or a }. 1198fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch); 120651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines TryConsumeToken(tok::semi); 1216bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return nullptr; 12265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 12365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 12465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParamLists.push_back( 12565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnTemplateParameterList(CurTemplateDepthTracker.getDepth(), 12665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ExportLoc, 12765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateLoc, LAngleLoc, 12865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams.data(), 12965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams.size(), RAngleLoc)); 13065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 13165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!TemplateParams.empty()) { 13265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali isSpecialization = false; 13365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ++CurTemplateDepthTracker; 13465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 13565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali LastParamListWasEmpty = true; 13665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 13765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } while (Tok.is(tok::kw_export) || Tok.is(tok::kw_template)); 13865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 13965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the actual template declaration. 14065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseSingleDeclarationAfterTemplate(Context, 14165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateInfo(&ParamLists, 14265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali isSpecialization, 14365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali LastParamListWasEmpty), 14465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingTemplateParams, 14565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclEnd, AS, AccessAttrs); 14665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 14765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 14865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Parse a single declaration that declares a template, 14965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template specialization, or explicit instantiation of a template. 15065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 15165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param DeclEnd will receive the source location of the last token 15265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// within this declaration. 15365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 15465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param AS the access specifier associated with this 15565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// declaration. Will be AS_none for namespace-scope declarations. 15665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 15765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \returns the new declaration. 15865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl * 15965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseSingleDeclarationAfterTemplate( 16065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali unsigned Context, 16165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali const ParsedTemplateInfo &TemplateInfo, 16265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingDeclRAIIObject &DiagsFromTParams, 16365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &DeclEnd, 16465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali AccessSpecifier AS, 16565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali AttributeList *AccessAttrs) { 16665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert(TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate && 16765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali "Template information required"); 16865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 16965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Context == Declarator::MemberContext) { 17065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // We are parsing a member template. 17165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseCXXClassMemberDeclaration(AS, AccessAttrs, TemplateInfo, 17265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali &DiagsFromTParams); 1736bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return nullptr; 17465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 17565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 17665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedAttributesWithRange prefixAttrs(AttrFactory); 17765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali MaybeParseCXX11Attributes(prefixAttrs); 17865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 17965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::kw_using)) 18065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseUsingDirectiveOrDeclaration(Context, TemplateInfo, DeclEnd, 18165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali prefixAttrs); 18265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 18365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the declaration specifiers, stealing any diagnostics from 18465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // the template parameters. 18565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingDeclSpec DS(*this, &DiagsFromTParams); 18665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 18765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseDeclarationSpecifiers(DS, TemplateInfo, AS, 18865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali getDeclSpecContextFromDeclaratorContext(Context)); 18965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 19065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::semi)) { 19165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ProhibitAttributes(prefixAttrs); 19265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclEnd = ConsumeToken(); 19365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Decl *Decl = Actions.ParsedFreeStandingDeclSpec( 19465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali getCurScope(), AS, DS, 19565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateInfo.TemplateParams ? *TemplateInfo.TemplateParams 19665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali : MultiTemplateParamsArg(), 19765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation); 19865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DS.complete(Decl); 19965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return Decl; 20065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 20165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 20265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Move the attributes from the prefix into the DS. 20365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) 20465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ProhibitAttributes(prefixAttrs); 20565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else 20665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DS.takeAttributesFrom(prefixAttrs); 20765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 20865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the declarator. 20965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingDeclarator DeclaratorInfo(*this, DS, (Declarator::TheContext)Context); 21065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseDeclarator(DeclaratorInfo); 21165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Error parsing the declarator? 21265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!DeclaratorInfo.hasName()) { 21365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If so, skip until the semi-colon or a }. 2148fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch); 21565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::semi)) 21665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 2176bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return nullptr; 21865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 21965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 22065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali LateParsedAttrList LateParsedAttrs(true); 22165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (DeclaratorInfo.isFunctionDeclarator()) 22265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs); 22365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 22465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (DeclaratorInfo.isFunctionDeclarator() && 22565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali isStartOfFunctionDefinition(DeclaratorInfo)) { 22665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 22765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Recover by ignoring the 'typedef'. This was probably supposed to be 22865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // the 'typename' keyword, which we should have already suggested adding 22965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // if it's appropriate. 23065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(DS.getStorageClassSpecLoc(), diag::err_function_declared_typedef) 23165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc()); 23265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DS.ClearStorageClassSpecs(); 23365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 2347c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo 2357c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) { 2367c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo if (DeclaratorInfo.getName().getKind() != UnqualifiedId::IK_TemplateId) { 2377c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo // If the declarator-id is not a template-id, issue a diagnostic and 2387c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo // recover by ignoring the 'template' keyword. 2397c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo Diag(Tok, diag::err_template_defn_explicit_instantiation) << 0; 240ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo return ParseFunctionDefinition(DeclaratorInfo, ParsedTemplateInfo(), 241ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo &LateParsedAttrs); 2427c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo } else { 2437c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo SourceLocation LAngleLoc 2447c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc); 245ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo Diag(DeclaratorInfo.getIdentifierLoc(), 2467c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo diag::err_explicit_instantiation_with_definition) 247ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo << SourceRange(TemplateInfo.TemplateLoc) 248ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo << FixItHint::CreateInsertion(LAngleLoc, "<>"); 2497c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo 250ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo // Recover as if it were an explicit specialization. 2514985429d6f0dddbe168ec0ed4de029d56294e644Larisse Voufo TemplateParameterLists FakedParamLists; 252ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo FakedParamLists.push_back(Actions.ActOnTemplateParameterList( 2536bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 0, SourceLocation(), TemplateInfo.TemplateLoc, LAngleLoc, nullptr, 2546bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines 0, LAngleLoc)); 2557c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo 256ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo return ParseFunctionDefinition( 257ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo DeclaratorInfo, ParsedTemplateInfo(&FakedParamLists, 258ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo /*isSpecialization=*/true, 259ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo /*LastParamListWasEmpty=*/true), 260ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo &LateParsedAttrs); 2617c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo } 2627c64ef05e179d29646030e9d453081844ecc537aLarisse Voufo } 26365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseFunctionDefinition(DeclaratorInfo, TemplateInfo, 264ef4579cda09b73e3d4d98af48201da25adc29326Larisse Voufo &LateParsedAttrs); 26565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 26665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 26765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse this declaration. 26865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Decl *ThisDecl = ParseDeclarationAfterDeclarator(DeclaratorInfo, 26965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateInfo); 27065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 27165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::comma)) { 27265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok, diag::err_multiple_template_declarators) 27365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali << (int)TemplateInfo.Kind; 2748fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev SkipUntil(tok::semi); 27565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ThisDecl; 27665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 27765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 27865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Eat the semi colon after the declaration. 27965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ExpectAndConsumeSemi(diag::err_expected_semi_declaration); 28065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (LateParsedAttrs.size() > 0) 28165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseLexedAttributeList(LateParsedAttrs, ThisDecl, true, false); 28265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclaratorInfo.complete(ThisDecl); 28365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ThisDecl; 28465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 28565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 28665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateParameters - Parses a template-parameter-list enclosed in 28765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// angle brackets. Depth is the depth of this template-parameter-list, which 28865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// is the number of template headers directly enclosing this template header. 28965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// TemplateParams is the current list of template parameters we're building. 29065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// The template parameter we parse will be added to this list. LAngleLoc and 29165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// RAngleLoc will receive the positions of the '<' and '>', respectively, 29265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// that enclose this template parameter list. 29365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 29465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \returns true if an error occurred, false otherwise. 29565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool Parser::ParseTemplateParameters(unsigned Depth, 29665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SmallVectorImpl<Decl*> &TemplateParams, 29765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &LAngleLoc, 29865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &RAngleLoc) { 29965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Get the template parameter list. 300651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (!TryConsumeToken(tok::less, LAngleLoc)) { 30165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_expected_less_after) << "template"; 30265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 30365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 30465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 30565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Try to parse the template parameter list. 30665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool Failed = false; 30765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!Tok.is(tok::greater) && !Tok.is(tok::greatergreater)) 30865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Failed = ParseTemplateParameterList(Depth, TemplateParams); 30965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 31065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::greatergreater)) { 31165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // No diagnostic required here: a template-parameter-list can only be 31265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // followed by a declaration or, for a template template parameter, the 31365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 'class' keyword. Therefore, the second '>' will be diagnosed later. 31465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // This matters for elegant diagnosis of: 31565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template<template<typename>> struct S; 31665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(tok::greater); 31765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RAngleLoc = Tok.getLocation(); 31865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(Tok.getLocation().getLocWithOffset(1)); 319651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } else if (!TryConsumeToken(tok::greater, RAngleLoc) && Failed) { 320651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Diag(Tok.getLocation(), diag::err_expected) << tok::greater; 32165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 32265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 32365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 32465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 32565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 32665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateParameterList - Parse a template parameter list. If 32765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// the parsing fails badly (i.e., closing bracket was left out), this 32865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// will try to put the token stream in a reasonable position (closing 32965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// a statement, etc.) and return false. 33065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 33165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-parameter-list: [C++ temp] 33265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-parameter 33365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-parameter-list ',' template-parameter 33465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool 33565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseTemplateParameterList(unsigned Depth, 33665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SmallVectorImpl<Decl*> &TemplateParams) { 33765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali while (1) { 33865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Decl *TmpParam 33965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali = ParseTemplateParameter(Depth, TemplateParams.size())) { 34065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams.push_back(TmpParam); 34165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 34265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If we failed to parse a template parameter, skip until we find 34365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // a comma or closing brace. 3448fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev SkipUntil(tok::comma, tok::greater, tok::greatergreater, 3458fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev StopAtSemi | StopBeforeMatch); 34665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 34765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 34865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Did we find a comma or the end of the template parameter list? 34965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::comma)) { 35065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 35165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else if (Tok.is(tok::greater) || Tok.is(tok::greatergreater)) { 35265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Don't consume this... that's done by template parser. 35365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali break; 35465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 35565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Somebody probably forgot to close the template. Skip ahead and 35665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // try to get out of the expression. This error is currently 35765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // subsumed by whatever goes on in ParseTemplateParameter. 35865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_expected_comma_greater); 3598fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev SkipUntil(tok::comma, tok::greater, tok::greatergreater, 3608fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev StopAtSemi | StopBeforeMatch); 36165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 36265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 36365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 36465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 36565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 36665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 36765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Determine whether the parser is at the start of a template 36865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type parameter. 36965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool Parser::isStartOfTemplateTypeParameter() { 37065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::kw_class)) { 37165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // "class" may be the start of an elaborated-type-specifier or a 37265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // type-parameter. Per C++ [temp.param]p3, we prefer the type-parameter. 37365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali switch (NextToken().getKind()) { 37465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::equal: 37565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::comma: 37665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greater: 37765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greatergreater: 37865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::ellipsis: 37965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 38065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 38165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::identifier: 38265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // This may be either a type-parameter or an elaborated-type-specifier. 38365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // We have to look further. 38465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali break; 38565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 38665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali default: 38765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 38865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 38965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 39065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali switch (GetLookAheadToken(2).getKind()) { 39165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::equal: 39265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::comma: 39365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greater: 39465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greatergreater: 39565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 39665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 39765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali default: 39865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 39965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 40065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 40165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 40265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.isNot(tok::kw_typename)) 40365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 40465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 40565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // C++ [temp.param]p2: 40665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // There is no semantic difference between class and typename in a 40765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template-parameter. typename followed by an unqualified-id 40865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // names a template type parameter. typename followed by a 40965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // qualified-id denotes the type in a non-type 41065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // parameter-declaration. 41165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Token Next = NextToken(); 41265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 41365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If we have an identifier, skip over it. 41465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Next.getKind() == tok::identifier) 41565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Next = GetLookAheadToken(2); 41665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 41765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali switch (Next.getKind()) { 41865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::equal: 41965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::comma: 42065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greater: 42165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greatergreater: 42265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::ellipsis: 42365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 42465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 42565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali default: 42665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 42765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 42865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 42965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 43065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateParameter - Parse a template-parameter (C++ [temp.param]). 43165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 43265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-parameter: [C++ temp.param] 43365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type-parameter 43465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// parameter-declaration 43565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 43665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type-parameter: (see below) 43765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'class' ...[opt] identifier[opt] 43865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'class' identifier[opt] '=' type-id 43965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'typename' ...[opt] identifier[opt] 44065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'typename' identifier[opt] '=' type-id 44165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'template' '<' template-parameter-list '>' 44265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'class' ...[opt] identifier[opt] 44365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'template' '<' template-parameter-list '>' 'class' identifier[opt] 44465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// = id-expression 44565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl *Parser::ParseTemplateParameter(unsigned Depth, unsigned Position) { 44665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (isStartOfTemplateTypeParameter()) 44765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseTypeParameter(Depth, Position); 44865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 44965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::kw_template)) 45065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseTemplateTemplateParameter(Depth, Position); 45165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 45265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If it's none of the above, then it must be a parameter declaration. 45365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // NOTE: This will pick up errors in the closure of the template parameter 45465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // list (e.g., template < ; Check here to implement >> style closures. 45565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseNonTypeTemplateParameter(Depth, Position); 45665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 45765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 45865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTypeParameter - Parse a template type parameter (C++ [temp.param]). 45965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// Other kinds of template parameters are parsed in 46065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateTemplateParameter and ParseNonTypeTemplateParameter. 46165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 46265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type-parameter: [C++ temp.param] 46365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'class' ...[opt][C++0x] identifier[opt] 46465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'class' identifier[opt] '=' type-id 46565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'typename' ...[opt][C++0x] identifier[opt] 46665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'typename' identifier[opt] '=' type-id 46765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl *Parser::ParseTypeParameter(unsigned Depth, unsigned Position) { 46865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert((Tok.is(tok::kw_class) || Tok.is(tok::kw_typename)) && 46965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali "A type-parameter starts with 'class' or 'typename'"); 47065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 47165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume the 'class' or 'typename' keyword. 47265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool TypenameKeyword = Tok.is(tok::kw_typename); 47365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation KeyLoc = ConsumeToken(); 47465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 47565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Grab the ellipsis (if given). 47665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation EllipsisLoc; 477651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (TryConsumeToken(tok::ellipsis, EllipsisLoc)) { 47865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(EllipsisLoc, 47965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali getLangOpts().CPlusPlus11 48065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ? diag::warn_cxx98_compat_variadic_templates 48165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali : diag::ext_variadic_templates); 48265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 48365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 48465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Grab the template parameter name (if given) 48565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation NameLoc; 4866bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines IdentifierInfo *ParamName = nullptr; 48765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::identifier)) { 48865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParamName = Tok.getIdentifierInfo(); 48965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali NameLoc = ConsumeToken(); 49065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else if (Tok.is(tok::equal) || Tok.is(tok::comma) || 49165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.is(tok::greater) || Tok.is(tok::greatergreater)) { 49265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Unnamed template parameter. Don't have to do anything here, just 49365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // don't consume this token. 49465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 495651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Diag(Tok.getLocation(), diag::err_expected) << tok::identifier; 4966bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return nullptr; 49765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 49865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 499ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Recover from misplaced ellipsis. 500ef8225444452a1486bd721f3285301fe84643b00Stephen Hines bool AlreadyHasEllipsis = EllipsisLoc.isValid(); 501ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (TryConsumeToken(tok::ellipsis, EllipsisLoc)) 502ef8225444452a1486bd721f3285301fe84643b00Stephen Hines DiagnoseMisplacedEllipsis(EllipsisLoc, NameLoc, AlreadyHasEllipsis, true); 503ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 50465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Grab a default argument (if available). 50565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before 50665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // we introduce the type parameter into the local scope. 50765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation EqualLoc; 50865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedType DefaultArg; 509651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (TryConsumeToken(tok::equal, EqualLoc)) 5106bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines DefaultArg = ParseTypeName(/*Range=*/nullptr, 51165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Declarator::TemplateTypeArgContext).get(); 51265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 513ef8225444452a1486bd721f3285301fe84643b00Stephen Hines return Actions.ActOnTypeParameter(getCurScope(), TypenameKeyword, EllipsisLoc, 514ef8225444452a1486bd721f3285301fe84643b00Stephen Hines KeyLoc, ParamName, NameLoc, Depth, Position, 515ef8225444452a1486bd721f3285301fe84643b00Stephen Hines EqualLoc, DefaultArg); 51665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 51765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 51865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateTemplateParameter - Handle the parsing of template 51965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template parameters. 52065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 52165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type-parameter: [C++ temp.param] 522ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// 'template' '<' template-parameter-list '>' type-parameter-key 52365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ...[opt] identifier[opt] 524ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// 'template' '<' template-parameter-list '>' type-parameter-key 525ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// identifier[opt] = id-expression 526ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// type-parameter-key: 527ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// 'class' 528ef8225444452a1486bd721f3285301fe84643b00Stephen Hines/// 'typename' [C++1z] 52965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl * 53065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseTemplateTemplateParameter(unsigned Depth, unsigned Position) { 53165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert(Tok.is(tok::kw_template) && "Expected 'template' keyword"); 53265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 53365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Handle the template <...> part. 53465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateLoc = ConsumeToken(); 53565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SmallVector<Decl*,8> TemplateParams; 53665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation LAngleLoc, RAngleLoc; 53765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali { 53865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseScope TemplateParmScope(this, Scope::TemplateParamScope); 53965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (ParseTemplateParameters(Depth + 1, TemplateParams, LAngleLoc, 54065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RAngleLoc)) { 5416bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return nullptr; 54265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 54365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 54465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 545ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Provide an ExtWarn if the C++1z feature of using 'typename' here is used. 54665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Generate a meaningful error if the user forgot to put class before the 54765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // identifier, comma, or greater. Provide a fixit if the identifier, comma, 548ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // or greater appear immediately or after 'struct'. In the latter case, 549ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // replace the keyword with 'class'. 550651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (!TryConsumeToken(tok::kw_class)) { 55165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool Replace = Tok.is(tok::kw_typename) || Tok.is(tok::kw_struct); 552ef8225444452a1486bd721f3285301fe84643b00Stephen Hines const Token &Next = Tok.is(tok::kw_struct) ? NextToken() : Tok; 553ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (Tok.is(tok::kw_typename)) { 554ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Diag(Tok.getLocation(), 555ef8225444452a1486bd721f3285301fe84643b00Stephen Hines getLangOpts().CPlusPlus1z 556ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ? diag::warn_cxx1y_compat_template_template_param_typename 557ef8225444452a1486bd721f3285301fe84643b00Stephen Hines : diag::ext_template_template_param_typename) 558ef8225444452a1486bd721f3285301fe84643b00Stephen Hines << (!getLangOpts().CPlusPlus1z 559ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ? FixItHint::CreateReplacement(Tok.getLocation(), "class") 560ef8225444452a1486bd721f3285301fe84643b00Stephen Hines : FixItHint()); 561ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } else if (Next.is(tok::identifier) || Next.is(tok::comma) || 562ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Next.is(tok::greater) || Next.is(tok::greatergreater) || 563ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Next.is(tok::ellipsis)) { 56465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_class_on_template_template_param) 56565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali << (Replace ? FixItHint::CreateReplacement(Tok.getLocation(), "class") 56665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali : FixItHint::CreateInsertion(Tok.getLocation(), "class ")); 567ef8225444452a1486bd721f3285301fe84643b00Stephen Hines } else 56865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_class_on_template_template_param); 56965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 57065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Replace) 57165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 572651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } 57365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 57465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the ellipsis, if given. 57565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation EllipsisLoc; 576651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (TryConsumeToken(tok::ellipsis, EllipsisLoc)) 57765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(EllipsisLoc, 57865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali getLangOpts().CPlusPlus11 57965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ? diag::warn_cxx98_compat_variadic_templates 58065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali : diag::ext_variadic_templates); 58165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 58265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Get the identifier, if given. 58365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation NameLoc; 5846bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines IdentifierInfo *ParamName = nullptr; 58565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::identifier)) { 58665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParamName = Tok.getIdentifierInfo(); 58765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali NameLoc = ConsumeToken(); 58865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else if (Tok.is(tok::equal) || Tok.is(tok::comma) || 58965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.is(tok::greater) || Tok.is(tok::greatergreater)) { 59065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Unnamed template parameter. Don't have to do anything here, just 59165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // don't consume this token. 59265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 593651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Diag(Tok.getLocation(), diag::err_expected) << tok::identifier; 5946bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return nullptr; 59565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 59665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 597ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Recover from misplaced ellipsis. 598ef8225444452a1486bd721f3285301fe84643b00Stephen Hines bool AlreadyHasEllipsis = EllipsisLoc.isValid(); 599ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (TryConsumeToken(tok::ellipsis, EllipsisLoc)) 600ef8225444452a1486bd721f3285301fe84643b00Stephen Hines DiagnoseMisplacedEllipsis(EllipsisLoc, NameLoc, AlreadyHasEllipsis, true); 601ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 60265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParameterList *ParamList = 60365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnTemplateParameterList(Depth, SourceLocation(), 60465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateLoc, LAngleLoc, 60565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams.data(), 60665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams.size(), 60765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RAngleLoc); 60865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 60965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Grab a default argument (if available). 61065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before 61165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // we introduce the template parameter into the local scope. 61265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation EqualLoc; 61365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateArgument DefaultArg; 614651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (TryConsumeToken(tok::equal, EqualLoc)) { 61565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DefaultArg = ParseTemplateTemplateArgument(); 61665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (DefaultArg.isInvalid()) { 61765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), 61865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali diag::err_default_template_template_parameter_not_template); 6198fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev SkipUntil(tok::comma, tok::greater, tok::greatergreater, 6208fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev StopAtSemi | StopBeforeMatch); 62165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 62265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 62365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 62465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return Actions.ActOnTemplateTemplateParameter(getCurScope(), TemplateLoc, 62565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParamList, EllipsisLoc, 62665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParamName, NameLoc, Depth, 62765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Position, EqualLoc, DefaultArg); 62865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 62965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 63065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseNonTypeTemplateParameter - Handle the parsing of non-type 63165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template parameters (e.g., in "template<int Size> class array;"). 63265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 63365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-parameter: 63465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ... 63565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// parameter-declaration 63665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl * 63765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseNonTypeTemplateParameter(unsigned Depth, unsigned Position) { 63865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the declaration-specifiers (i.e., the type). 63965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // FIXME: The type should probably be restricted in some way... Not all 64065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // declarators (parts of declarators?) are accepted for parameters. 64165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclSpec DS(AttrFactory); 64265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseDeclarationSpecifiers(DS); 64365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 64465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse this as a typename. 64565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Declarator ParamDecl(DS, Declarator::TemplateParamContext); 64665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseDeclarator(ParamDecl); 64765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (DS.getTypeSpecType() == DeclSpec::TST_unspecified) { 64865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), diag::err_expected_template_parameter); 6496bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return nullptr; 65065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 65165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 652ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // Recover from misplaced ellipsis. 653ef8225444452a1486bd721f3285301fe84643b00Stephen Hines SourceLocation EllipsisLoc; 654ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (TryConsumeToken(tok::ellipsis, EllipsisLoc)) 655ef8225444452a1486bd721f3285301fe84643b00Stephen Hines DiagnoseMisplacedEllipsisInDeclarator(EllipsisLoc, ParamDecl); 656ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 65765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If there is a default value, parse it. 65865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before 65965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // we introduce the template parameter into the local scope. 66065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation EqualLoc; 66165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ExprResult DefaultArg; 662651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (TryConsumeToken(tok::equal, EqualLoc)) { 66365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // C++ [temp.param]p15: 66465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // When parsing a default template-argument for a non-type 66565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template-parameter, the first non-nested > is taken as the 66665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // end of the template-parameter-list rather than a greater-than 66765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // operator. 66865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali GreaterThanIsOperatorScope G(GreaterThanIsOperator, false); 66965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated); 67065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 67165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DefaultArg = ParseAssignmentExpression(); 67265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (DefaultArg.isInvalid()) 6738fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev SkipUntil(tok::comma, tok::greater, StopAtSemi | StopBeforeMatch); 67465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 67565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 67665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Create the parameter. 67765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return Actions.ActOnNonTypeTemplateParameter(getCurScope(), ParamDecl, 67865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Depth, Position, EqualLoc, 679ef8225444452a1486bd721f3285301fe84643b00Stephen Hines DefaultArg.get()); 680ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 681ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 682ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesvoid Parser::DiagnoseMisplacedEllipsis(SourceLocation EllipsisLoc, 683ef8225444452a1486bd721f3285301fe84643b00Stephen Hines SourceLocation CorrectLoc, 684ef8225444452a1486bd721f3285301fe84643b00Stephen Hines bool AlreadyHasEllipsis, 685ef8225444452a1486bd721f3285301fe84643b00Stephen Hines bool IdentifierHasName) { 686ef8225444452a1486bd721f3285301fe84643b00Stephen Hines FixItHint Insertion; 687ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!AlreadyHasEllipsis) 688ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Insertion = FixItHint::CreateInsertion(CorrectLoc, "..."); 689ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Diag(EllipsisLoc, diag::err_misplaced_ellipsis_in_declaration) 690ef8225444452a1486bd721f3285301fe84643b00Stephen Hines << FixItHint::CreateRemoval(EllipsisLoc) << Insertion 691ef8225444452a1486bd721f3285301fe84643b00Stephen Hines << !IdentifierHasName; 692ef8225444452a1486bd721f3285301fe84643b00Stephen Hines} 693ef8225444452a1486bd721f3285301fe84643b00Stephen Hines 694ef8225444452a1486bd721f3285301fe84643b00Stephen Hinesvoid Parser::DiagnoseMisplacedEllipsisInDeclarator(SourceLocation EllipsisLoc, 695ef8225444452a1486bd721f3285301fe84643b00Stephen Hines Declarator &D) { 696ef8225444452a1486bd721f3285301fe84643b00Stephen Hines assert(EllipsisLoc.isValid()); 697ef8225444452a1486bd721f3285301fe84643b00Stephen Hines bool AlreadyHasEllipsis = D.getEllipsisLoc().isValid(); 698ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (!AlreadyHasEllipsis) 699ef8225444452a1486bd721f3285301fe84643b00Stephen Hines D.setEllipsisLoc(EllipsisLoc); 700ef8225444452a1486bd721f3285301fe84643b00Stephen Hines DiagnoseMisplacedEllipsis(EllipsisLoc, D.getIdentifierLoc(), 701ef8225444452a1486bd721f3285301fe84643b00Stephen Hines AlreadyHasEllipsis, D.hasName()); 70265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 70365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 70465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Parses a '>' at the end of a template list. 70565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 70665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// If this function encounters '>>', '>>>', '>=', or '>>=', it tries 70765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// to determine if these tokens were supposed to be a '>' followed by 70865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// '>', '>>', '>=', or '>='. It emits an appropriate diagnostic if necessary. 70965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 71065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param RAngleLoc the location of the consumed '>'. 71165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 71265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param ConsumeLastToken if true, the '>' is not consumed. 71362f675cf69ca52c163fd9c0564d84356bb7ffca1Serge Pavlov/// 71462f675cf69ca52c163fd9c0564d84356bb7ffca1Serge Pavlov/// \returns true, if current token does not start with '>', false otherwise. 71565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool Parser::ParseGreaterThanInTemplateList(SourceLocation &RAngleLoc, 71665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool ConsumeLastToken) { 71765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // What will be left once we've consumed the '>'. 71865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali tok::TokenKind RemainingToken; 71965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali const char *ReplacementStr = "> >"; 72065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 72165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali switch (Tok.getKind()) { 72265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali default: 723651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Diag(Tok.getLocation(), diag::err_expected) << tok::greater; 72465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 72565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 72665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greater: 72765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Determine the location of the '>' token. Only consume this token 72865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // if the caller asked us to. 72965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RAngleLoc = Tok.getLocation(); 73065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (ConsumeLastToken) 73165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 73265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 73365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 73465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greatergreater: 73565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RemainingToken = tok::greater; 73665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali break; 73765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 73865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greatergreatergreater: 73965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RemainingToken = tok::greatergreater; 74065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali break; 74165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 74265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greaterequal: 74365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RemainingToken = tok::equal; 74465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ReplacementStr = "> ="; 74565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali break; 74665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 74765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali case tok::greatergreaterequal: 74865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RemainingToken = tok::greaterequal; 74965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali break; 75065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 75165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 75265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // This template-id is terminated by a token which starts with a '>'. Outside 75365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // C++11, this is now error recovery, and in C++11, this is error recovery if 754ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // the token isn't '>>' or '>>>'. 755ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // '>>>' is for CUDA, where this sequence of characters is parsed into 756ef8225444452a1486bd721f3285301fe84643b00Stephen Hines // tok::greatergreatergreater, rather than two separate tokens. 75765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 75865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RAngleLoc = Tok.getLocation(); 75965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 76065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // The source range of the '>>' or '>=' at the start of the token. 76165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali CharSourceRange ReplacementRange = 76265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali CharSourceRange::getCharRange(RAngleLoc, 76365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Lexer::AdvanceToTokenCharacter(RAngleLoc, 2, PP.getSourceManager(), 76465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali getLangOpts())); 76565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 76665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // A hint to put a space between the '>>'s. In order to make the hint as 76765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // clear as possible, we include the characters either side of the space in 76865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // the replacement, rather than just inserting a space at SecondCharLoc. 76965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali FixItHint Hint1 = FixItHint::CreateReplacement(ReplacementRange, 77065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ReplacementStr); 77165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 77265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // A hint to put another space after the token, if it would otherwise be 77365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // lexed differently. 77465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali FixItHint Hint2; 77565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Token Next = NextToken(); 77665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if ((RemainingToken == tok::greater || 77765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RemainingToken == tok::greatergreater) && 77865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali (Next.is(tok::greater) || Next.is(tok::greatergreater) || 77965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Next.is(tok::greatergreatergreater) || Next.is(tok::equal) || 78065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Next.is(tok::greaterequal) || Next.is(tok::greatergreaterequal) || 78165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Next.is(tok::equalequal)) && 78265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali areTokensAdjacent(Tok, Next)) 78365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Hint2 = FixItHint::CreateInsertion(Next.getLocation(), " "); 78465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 78565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali unsigned DiagId = diag::err_two_right_angle_brackets_need_space; 786ef8225444452a1486bd721f3285301fe84643b00Stephen Hines if (getLangOpts().CPlusPlus11 && 787ef8225444452a1486bd721f3285301fe84643b00Stephen Hines (Tok.is(tok::greatergreater) || Tok.is(tok::greatergreatergreater))) 78865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DiagId = diag::warn_cxx98_compat_two_right_angle_brackets; 78965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else if (Tok.is(tok::greaterequal)) 79065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DiagId = diag::err_right_angle_bracket_equal_needs_space; 79165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Diag(Tok.getLocation(), DiagId) << Hint1 << Hint2; 79265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 79365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Strip the initial '>' from the token. 79465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (RemainingToken == tok::equal && Next.is(tok::equal) && 79565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali areTokensAdjacent(Tok, Next)) { 79665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Join two adjacent '=' tokens into one, for cases like: 79765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // void (*p)() = f<int>; 79865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // return f<int>==p; 79965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 80065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(tok::equalequal); 80165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLength(Tok.getLength() + 1); 80265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 80365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(RemainingToken); 80465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLength(Tok.getLength() - 1); 80565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 80665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(Lexer::AdvanceToTokenCharacter(RAngleLoc, 1, 80765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali PP.getSourceManager(), 80865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali getLangOpts())); 80965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 81065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!ConsumeLastToken) { 81165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Since we're not supposed to consume the '>' token, we need to push 81265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // this token and revert the current token back to the '>'. 81365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali PP.EnterToken(Tok); 81465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(tok::greater); 81565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLength(1); 81665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(RAngleLoc); 81765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 81865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 81965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 82065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 82165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 82265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Parses a template-id that after the template name has 82365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// already been parsed. 82465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 82565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// This routine takes care of parsing the enclosed template argument 82665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// list ('<' template-parameter-list [opt] '>') and placing the 82765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// results into a form that can be transferred to semantic analysis. 82865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 82965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param Template the template declaration produced by isTemplateName 83065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 83165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param TemplateNameLoc the source location of the template name 83265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 83365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param SS if non-NULL, the nested-name-specifier preceding the 83465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template name. 83565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 83665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param ConsumeLastToken if true, then we will consume the last 83765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// token that forms the template-id. Otherwise, we will leave the 83865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// last token in the stream (e.g., so that it can be replaced with an 83965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// annotation token). 84065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool 84165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseTemplateIdAfterTemplateName(TemplateTy Template, 84265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateNameLoc, 84365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali const CXXScopeSpec &SS, 84465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool ConsumeLastToken, 84565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &LAngleLoc, 84665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateArgList &TemplateArgs, 84765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &RAngleLoc) { 84865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert(Tok.is(tok::less) && "Must have already parsed the template-name"); 84965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 85065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume the '<'. 85165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali LAngleLoc = ConsumeToken(); 85265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 85365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the optional template-argument-list. 85465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool Invalid = false; 85565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali { 85665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali GreaterThanIsOperatorScope G(GreaterThanIsOperator, false); 85765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.isNot(tok::greater) && Tok.isNot(tok::greatergreater)) 85865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Invalid = ParseTemplateArgumentList(TemplateArgs); 85965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 86065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Invalid) { 86165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Try to find the closing '>'. 8628fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev if (ConsumeLastToken) 8638fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev SkipUntil(tok::greater, StopAtSemi); 8648fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev else 8658fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev SkipUntil(tok::greater, StopAtSemi | StopBeforeMatch); 86665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 86765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 86865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 86965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 87065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseGreaterThanInTemplateList(RAngleLoc, ConsumeLastToken); 87165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 87265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 87365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Replace the tokens that form a simple-template-id with an 87465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// annotation token containing the complete template-id. 87565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 87665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// The first token in the stream must be the name of a template that 87765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// is followed by a '<'. This routine will parse the complete 87865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// simple-template-id and replace the tokens with a single annotation 87965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// token with one of two different kinds: if the template-id names a 88065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type (and \p AllowTypeAnnotation is true), the annotation token is 88165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// a type annotation that includes the optional nested-name-specifier 88265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// (\p SS). Otherwise, the annotation token is a template-id 88365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// annotation that does not include the optional 88465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// nested-name-specifier. 88565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 88665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param Template the declaration of the template named by the first 88765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// token (an identifier), as returned from \c Action::isTemplateName(). 88865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 88965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param TNK the kind of template that \p Template 89065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// refers to, as returned from \c Action::isTemplateName(). 89165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 89265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param SS if non-NULL, the nested-name-specifier that precedes 89365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// this template name. 89465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 89565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param TemplateKWLoc if valid, specifies that this template-id 89665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// annotation was preceded by the 'template' keyword and gives the 89765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// location of that keyword. If invalid (the default), then this 89865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-id was not preceded by a 'template' keyword. 89965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 90065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \param AllowTypeAnnotation if true (the default), then a 90165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// simple-template-id that refers to a class template, template 90265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template parameter, or other template that produces a type will be 90365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// replaced with a type annotation token. Otherwise, the 90465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// simple-template-id is always replaced with a template-id 90565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// annotation token. 90665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 90765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// If an unrecoverable parse error occurs and no annotation token can be 90865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// formed, this function returns true. 90965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 91065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool Parser::AnnotateTemplateIdToken(TemplateTy Template, TemplateNameKind TNK, 91165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali CXXScopeSpec &SS, 91265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateKWLoc, 91365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali UnqualifiedId &TemplateName, 91465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool AllowTypeAnnotation) { 91565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert(getLangOpts().CPlusPlus && "Can only annotate template-ids in C++"); 91665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert(Template && Tok.is(tok::less) && 91765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali "Parser isn't at the beginning of a template-id"); 91865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 91965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume the template-name. 92065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateNameLoc = TemplateName.getSourceRange().getBegin(); 92165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 92265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the enclosed template argument list. 92365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation LAngleLoc, RAngleLoc; 92465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateArgList TemplateArgs; 92565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool Invalid = ParseTemplateIdAfterTemplateName(Template, 92665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateNameLoc, 92765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SS, false, LAngleLoc, 92865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateArgs, 92965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali RAngleLoc); 93065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 93165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Invalid) { 93265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If we failed to parse the template ID but skipped ahead to a >, we're not 93365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // going to be able to form a token annotation. Eat the '>' if present. 934651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines TryConsumeToken(tok::greater); 93565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 93665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 93765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 93865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ASTTemplateArgsPtr TemplateArgsPtr(TemplateArgs); 93965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 94065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Build the annotation token. 94165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TNK == TNK_Type_template && AllowTypeAnnotation) { 94265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TypeResult Type 94365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali = Actions.ActOnTemplateIdType(SS, TemplateKWLoc, 94465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Template, TemplateNameLoc, 94565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali LAngleLoc, TemplateArgsPtr, RAngleLoc); 94665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Type.isInvalid()) { 94765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If we failed to parse the template ID but skipped ahead to a >, we're not 94865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // going to be able to form a token annotation. Eat the '>' if present. 949651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines TryConsumeToken(tok::greater); 95065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 95165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 95265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 95365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(tok::annot_typename); 95465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali setTypeAnnotation(Tok, Type.get()); 95565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (SS.isNotEmpty()) 95665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(SS.getBeginLoc()); 95765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else if (TemplateKWLoc.isValid()) 95865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(TemplateKWLoc); 95965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else 96065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(TemplateNameLoc); 96165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 96265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Build a template-id annotation token that can be processed 96365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // later. 96465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(tok::annot_template_id); 96565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateIdAnnotation *TemplateId 96665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali = TemplateIdAnnotation::Allocate(TemplateArgs.size(), TemplateIds); 96765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->TemplateNameLoc = TemplateNameLoc; 96865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TemplateName.getKind() == UnqualifiedId::IK_Identifier) { 96965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Name = TemplateName.Identifier; 97065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Operator = OO_None; 97165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 9726bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines TemplateId->Name = nullptr; 97365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Operator = TemplateName.OperatorFunctionId.Operator; 97465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 97565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->SS = SS; 97665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->TemplateKWLoc = TemplateKWLoc; 97765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Template = Template; 97865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Kind = TNK; 97965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->LAngleLoc = LAngleLoc; 98065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->RAngleLoc = RAngleLoc; 98165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateArgument *Args = TemplateId->getTemplateArgs(); 98265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali for (unsigned Arg = 0, ArgEnd = TemplateArgs.size(); Arg != ArgEnd; ++Arg) 98365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Args[Arg] = ParsedTemplateArgument(TemplateArgs[Arg]); 98465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setAnnotationValue(TemplateId); 98565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TemplateKWLoc.isValid()) 98665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(TemplateKWLoc); 98765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else 98865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(TemplateNameLoc); 98965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 99065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 99165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Common fields for the annotation token 99265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setAnnotationEndLoc(RAngleLoc); 99365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 99465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // In case the tokens were cached, have Preprocessor replace them with the 99565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // annotation token. 99665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali PP.AnnotateCachedTokens(Tok); 99765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 99865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 99965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 100065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Replaces a template-id annotation token with a type 100165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// annotation token. 100265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 100365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// If there was a failure when forming the type from the template-id, 100465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// a type annotation token will still be created, but will have a 100565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// NULL type pointer to signify an error. 100665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valivoid Parser::AnnotateTemplateIdTokenAsType() { 100765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert(Tok.is(tok::annot_template_id) && "Requires template-id tokens"); 100865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 100965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); 101065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert((TemplateId->Kind == TNK_Type_template || 101165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Kind == TNK_Dependent_template_name) && 101265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali "Only works for type and dependent templates"); 101365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 101465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(), 101565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->NumArgs); 101665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 101765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TypeResult Type 101865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali = Actions.ActOnTemplateIdType(TemplateId->SS, 101965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->TemplateKWLoc, 102065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->Template, 102165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->TemplateNameLoc, 102265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->LAngleLoc, 102365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateArgsPtr, 102465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateId->RAngleLoc); 102565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Create the new "type" annotation token. 102665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setKind(tok::annot_typename); 102765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali setTypeAnnotation(Tok, Type.isInvalid() ? ParsedType() : Type.get()); 102865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TemplateId->SS.isNotEmpty()) // it was a C++ qualified type name. 102965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.setLocation(TemplateId->SS.getBeginLoc()); 103065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // End location stays the same 103165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 103265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Replace the template-id annotation token, and possible the scope-specifier 103365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // that precedes it, with the typename annotation token. 103465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali PP.AnnotateCachedTokens(Tok); 103565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 103665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 103765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Determine whether the given token can end a template argument. 103865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valistatic bool isEndOfTemplateArgument(Token Tok) { 103965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return Tok.is(tok::comma) || Tok.is(tok::greater) || 104065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Tok.is(tok::greatergreater); 104165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 104265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 104365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Parse a C++ template template argument. 104465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParsedTemplateArgument Parser::ParseTemplateTemplateArgument() { 104565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!Tok.is(tok::identifier) && !Tok.is(tok::coloncolon) && 104665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali !Tok.is(tok::annot_cxxscope)) 104765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParsedTemplateArgument(); 104865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 104965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // C++0x [temp.arg.template]p1: 105065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // A template-argument for a template template-parameter shall be the name 105165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // of a class template or an alias template, expressed as id-expression. 105265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 105365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // We parse an id-expression that refers to a class template or alias 105465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template. The grammar we parse is: 105565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 105665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // nested-name-specifier[opt] template[opt] identifier ...[opt] 105765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 105865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // followed by a token that terminates a template argument, such as ',', 105965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // '>', or (in some cases) '>>'. 106065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali CXXScopeSpec SS; // nested-name-specifier, if present 106165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseOptionalCXXScopeSpecifier(SS, ParsedType(), 106265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali /*EnteringContext=*/false); 106365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 106465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateArgument Result; 106565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation EllipsisLoc; 106665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (SS.isSet() && Tok.is(tok::kw_template)) { 106765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the optional 'template' keyword following the 106865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // nested-name-specifier. 106965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateKWLoc = ConsumeToken(); 107065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 107165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::identifier)) { 107265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // We appear to have a dependent template name. 107365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali UnqualifiedId Name; 107465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 107565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); // the identifier 1076651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1077651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines TryConsumeToken(tok::ellipsis, EllipsisLoc); 1078651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 107965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If the next token signals the end of a template argument, 108065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // then we have a dependent template name that could be a template 108165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // template argument. 108265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateTy Template; 108365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (isEndOfTemplateArgument(Tok) && 108465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnDependentTemplateName(getCurScope(), 108565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SS, TemplateKWLoc, Name, 108665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali /*ObjectType=*/ ParsedType(), 108765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali /*EnteringContext=*/false, 108865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Template)) 108965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Result = ParsedTemplateArgument(SS, Template, Name.StartLocation); 109065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 109165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else if (Tok.is(tok::identifier)) { 109265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // We may have a (non-dependent) template name. 109365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateTy Template; 109465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali UnqualifiedId Name; 109565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 109665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); // the identifier 1097651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1098651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines TryConsumeToken(tok::ellipsis, EllipsisLoc); 109965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 110065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (isEndOfTemplateArgument(Tok)) { 110165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali bool MemberOfUnknownSpecialization; 110265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateNameKind TNK = Actions.isTemplateName(getCurScope(), SS, 110365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali /*hasTemplateKeyword=*/false, 110465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Name, 110565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali /*ObjectType=*/ ParsedType(), 110665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali /*EnteringContext=*/false, 110765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Template, 110865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali MemberOfUnknownSpecialization); 110965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TNK == TNK_Dependent_template_name || TNK == TNK_Type_template) { 111065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // We have an id-expression that refers to a class template or 111165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // (C++0x) alias template. 111265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Result = ParsedTemplateArgument(SS, Template, Name.StartLocation); 111365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 111465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 111565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 111665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 111765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If this is a pack expansion, build it as such. 111865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (EllipsisLoc.isValid() && !Result.isInvalid()) 111965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Result = Actions.ActOnPackExpansion(Result, EllipsisLoc); 112065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 112165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return Result; 112265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 112365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 112465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateArgument - Parse a C++ template argument (C++ [temp.names]). 112565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 112665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-argument: [C++ 14.2] 112765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// constant-expression 112865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// type-id 112965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// id-expression 113065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParsedTemplateArgument Parser::ParseTemplateArgument() { 113165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // C++ [temp.arg]p2: 113265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // In a template-argument, an ambiguity between a type-id and an 113365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // expression is resolved to a type-id, regardless of the form of 113465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // the corresponding template-parameter. 113565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // 113665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Therefore, we initially try to parse a type-id. 113765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (isCXXTypeId(TypeIdAsTemplateArgument)) { 113865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation Loc = Tok.getLocation(); 11396bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines TypeResult TypeArg = ParseTypeName(/*Range=*/nullptr, 114065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Declarator::TemplateTypeArgContext); 114165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TypeArg.isInvalid()) 114265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParsedTemplateArgument(); 114365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 114465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParsedTemplateArgument(ParsedTemplateArgument::Type, 114565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TypeArg.get().getAsOpaquePtr(), 114665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Loc); 114765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 114865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 114965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Try to parse a template template argument. 115065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali { 115165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TentativeParsingAction TPA(*this); 115265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 115365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateArgument TemplateTemplateArgument 115465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali = ParseTemplateTemplateArgument(); 115565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!TemplateTemplateArgument.isInvalid()) { 115665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TPA.Commit(); 115765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return TemplateTemplateArgument; 115865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 115965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 116065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Revert this tentative parse to parse a non-type template argument. 116165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TPA.Revert(); 116265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 116365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 116465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse a non-type template argument. 116565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation Loc = Tok.getLocation(); 116665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ExprResult ExprArg = ParseConstantExpression(MaybeTypeCast); 116765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (ExprArg.isInvalid() || !ExprArg.get()) 116865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParsedTemplateArgument(); 116965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 117065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParsedTemplateArgument(ParsedTemplateArgument::NonType, 1171ef8225444452a1486bd721f3285301fe84643b00Stephen Hines ExprArg.get(), Loc); 117265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 117365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 117465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Determine whether the current tokens can only be parsed as a 117565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template argument list (starting with the '<') and never as a '<' 117665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// expression. 117765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool Parser::IsTemplateArgumentList(unsigned Skip) { 117865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali struct AlwaysRevertAction : TentativeParsingAction { 117965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali AlwaysRevertAction(Parser &P) : TentativeParsingAction(P) { } 118065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ~AlwaysRevertAction() { Revert(); } 118165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } Tentative(*this); 118265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 118365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali while (Skip) { 118465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 118565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali --Skip; 118665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 118765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 118865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // '<' 1189651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (!TryConsumeToken(tok::less)) 119065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 119165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 119265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // An empty template argument list. 119365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::greater)) 119465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 119565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 119665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // See whether we have declaration specifiers, which indicate a type. 11976bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines while (isCXXDeclarationSpecifier() == TPResult::True) 119865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeToken(); 119965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 120065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If we have a '>' or a ',' then this is a template argument list. 120165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return Tok.is(tok::greater) || Tok.is(tok::comma); 120265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 120365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 120465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// ParseTemplateArgumentList - Parse a C++ template-argument-list 120565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// (C++ [temp.names]). Returns true if there was an error. 120665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 120765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-argument-list: [C++ 14.2] 120865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-argument 120965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// template-argument-list ',' template-argument 121065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valibool 121165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiParser::ParseTemplateArgumentList(TemplateArgList &TemplateArgs) { 121265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Template argument lists are constant-evaluation contexts. 121365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali EnterExpressionEvaluationContext EvalContext(Actions,Sema::ConstantEvaluated); 12146bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines ColonProtectionRAIIObject ColonProtection(*this, false); 121565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 1216651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines do { 121765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateArgument Arg = ParseTemplateArgument(); 1218651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines SourceLocation EllipsisLoc; 1219651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (TryConsumeToken(tok::ellipsis, EllipsisLoc)) 122065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Arg = Actions.ActOnPackExpansion(Arg, EllipsisLoc); 122165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 122265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Arg.isInvalid()) { 12238fe2475a4b4c00475709c13d43eb9a57cce87cbcAlexey Bataev SkipUntil(tok::comma, tok::greater, StopAtSemi | StopBeforeMatch); 122465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return true; 122565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 122665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 122765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Save this template argument. 122865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateArgs.push_back(Arg); 122965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 123065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If the next token is a comma, consume it and keep reading 123165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // arguments. 1232651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } while (TryConsumeToken(tok::comma)); 123365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 123465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return false; 123565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 123665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 123765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Parse a C++ explicit template instantiation 123865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// (C++ [temp.explicit]). 123965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 124065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// explicit-instantiation: 124165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 'extern' [opt] 'template' declaration 124265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// 124365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// Note that the 'extern' is a GNU extension and C++11 feature. 124465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiDecl *Parser::ParseExplicitInstantiation(unsigned Context, 124565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation ExternLoc, 124665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation TemplateLoc, 124765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceLocation &DeclEnd, 124865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali AccessSpecifier AS) { 124965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // This isn't really required here. 125065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingDeclRAIIObject 125165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingTemplateParams(*this, ParsingDeclRAIIObject::NoParent); 125265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 125365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return ParseSingleDeclarationAfterTemplate(Context, 125465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsedTemplateInfo(ExternLoc, 125565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateLoc), 125665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParsingTemplateParams, 125765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclEnd, AS); 125865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 125965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 126065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal ValiSourceRange Parser::ParsedTemplateInfo::getSourceRange() const { 126165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (TemplateParams) 126265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return getTemplateParamsRange(TemplateParams->data(), 126365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParams->size()); 126465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 126565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SourceRange R(TemplateLoc); 126665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (ExternLoc.isValid()) 126765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali R.setBegin(ExternLoc); 126865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return R; 126965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 127065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 1271ac32d9044b9c1e7492cef929a322d23ce899d276Richard Smithvoid Parser::LateTemplateParserCallback(void *P, LateParsedTemplate &LPT) { 1272ac32d9044b9c1e7492cef929a322d23ce899d276Richard Smith ((Parser *)P)->ParseLateTemplatedFuncDef(LPT); 127365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 127465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 127565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Late parse a C++ function template in Microsoft mode. 1276ac32d9044b9c1e7492cef929a322d23ce899d276Richard Smithvoid Parser::ParseLateTemplatedFuncDef(LateParsedTemplate &LPT) { 1277360d23ef628bf891514e77c519d1d77305ca1743David Majnemer if (!LPT.D) 127865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali return; 127965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 128065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Get the FunctionDecl. 1281651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines FunctionDecl *FunD = LPT.D->getAsFunction(); 128265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Track template parameter depth. 128365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth); 128465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 128565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // To restore the context after late parsing. 128665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Sema::ContextRAII GlobalSavedContext(Actions, Actions.CurContext); 128765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 128865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SmallVector<ParseScope*, 4> TemplateParamScopeStack; 128965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 129065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Get the list of DeclContexts to reenter. 129165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali SmallVector<DeclContext*, 4> DeclContextsToReenter; 12926bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines DeclContext *DD = FunD; 129365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali while (DD && !DD->isTranslationUnit()) { 129465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclContextsToReenter.push_back(DD); 129565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DD = DD->getLexicalParent(); 129665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 129765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 129865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Reenter template scopes from outermost to innermost. 1299163fbf810eaffc2c7b0170d91b6196b032911957Craig Topper SmallVectorImpl<DeclContext *>::reverse_iterator II = 130065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali DeclContextsToReenter.rbegin(); 130165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali for (; II != DeclContextsToReenter.rend(); ++II) { 13026bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines TemplateParamScopeStack.push_back(new ParseScope(this, 13036bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines Scope::TemplateParamScope)); 13046bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines unsigned NumParamLists = 13056bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines Actions.ActOnReenterTemplateScope(getCurScope(), cast<Decl>(*II)); 13066bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CurTemplateDepthTracker.addDepth(NumParamLists); 13076bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (*II != FunD) { 13086bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines TemplateParamScopeStack.push_back(new ParseScope(this, Scope::DeclScope)); 13096bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines Actions.PushDeclContext(Actions.getCurScope(), *II); 131065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 131165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 131265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 1313ac32d9044b9c1e7492cef929a322d23ce899d276Richard Smith assert(!LPT.Toks.empty() && "Empty body!"); 131465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 131565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Append the current token at the end of the new token stream so that it 131665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // doesn't get lost. 1317ac32d9044b9c1e7492cef929a322d23ce899d276Richard Smith LPT.Toks.push_back(Tok); 1318ac32d9044b9c1e7492cef929a322d23ce899d276Richard Smith PP.EnterTokenStream(LPT.Toks.data(), LPT.Toks.size(), true, false); 131965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 132065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume the previously pushed token. 132165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true); 132265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali assert((Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try)) 132365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali && "Inline method not starting with '{', ':' or 'try'"); 132465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 132565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Parse the method body. Function body parsing code is similar enough 132665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // to be re-used for method bodies as well. 132765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope); 132865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 132965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Recreate the containing function DeclContext. 133065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Sema::ContextRAII FunctionSavedContext(Actions, Actions.getContainingDC(FunD)); 133165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 133265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali Actions.ActOnStartOfFunctionDef(getCurScope(), FunD); 133365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 133465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::kw_try)) { 1335ac32d9044b9c1e7492cef929a322d23ce899d276Richard Smith ParseFunctionTryBlock(LPT.D, FnScope); 133665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else { 133765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::colon)) 1338ac32d9044b9c1e7492cef929a322d23ce899d276Richard Smith ParseConstructorInitializer(LPT.D); 133965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali else 1340ac32d9044b9c1e7492cef929a322d23ce899d276Richard Smith Actions.ActOnDefaultCtorInitializers(LPT.D); 134165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 134265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (Tok.is(tok::l_brace)) { 1343651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines assert((!isa<FunctionTemplateDecl>(LPT.D) || 1344651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines cast<FunctionTemplateDecl>(LPT.D) 1345651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines ->getTemplateParameters() 13466bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines ->getDepth() == TemplateParameterDepth - 1) && 134765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali "TemplateParameterDepth should be greater than the depth of " 134865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali "current template being instantiated!"); 1349ac32d9044b9c1e7492cef929a322d23ce899d276Richard Smith ParseFunctionStatementBody(LPT.D, FnScope); 1350ac32d9044b9c1e7492cef929a322d23ce899d276Richard Smith Actions.UnmarkAsLateParsedTemplate(FunD); 135165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } else 13526bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines Actions.ActOnFinishFunctionBody(LPT.D, nullptr); 135365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 135465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 135565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Exit scopes. 135665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali FnScope.Exit(); 1357163fbf810eaffc2c7b0170d91b6196b032911957Craig Topper SmallVectorImpl<ParseScope *>::reverse_iterator I = 135865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali TemplateParamScopeStack.rbegin(); 135965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali for (; I != TemplateParamScopeStack.rend(); ++I) 136065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali delete *I; 136165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 136265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 136365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali/// \brief Lex a delayed template function for late parsing. 136465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Valivoid Parser::LexTemplateFunctionForLateParsing(CachedTokens &Toks) { 136565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali tok::TokenKind kind = Tok.getKind(); 136665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (!ConsumeAndStoreFunctionPrologue(Toks)) { 136765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // Consume everything up to (and including) the matching right brace. 136865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false); 136965efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 137065efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali 137165efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali // If we're in a function-try-block, we need to store all the catch blocks. 137265efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali if (kind == tok::kw_try) { 137365efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali while (Tok.is(tok::kw_catch)) { 137465efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false); 137565efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false); 137665efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 137765efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali } 137865efd10a5f54e4ffa23996d3779fd9318f01c4b7Faisal Vali} 1379