forked from OSchip/llvm-project
452 lines
18 KiB
C++
452 lines
18 KiB
C++
//===--- DeclCXX.cpp - C++ Declaration AST Node Implementation ------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the C++ related Decl classes for templates.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/DeclCXX.h"
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#include "clang/AST/DeclTemplate.h"
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#include "clang/AST/Expr.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/Basic/IdentifierTable.h"
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#include "llvm/ADT/STLExtras.h"
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// TemplateParameterList Implementation
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//===----------------------------------------------------------------------===//
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TemplateParameterList::TemplateParameterList(SourceLocation TemplateLoc,
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SourceLocation LAngleLoc,
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Decl **Params, unsigned NumParams,
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SourceLocation RAngleLoc)
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: TemplateLoc(TemplateLoc), LAngleLoc(LAngleLoc), RAngleLoc(RAngleLoc),
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NumParams(NumParams) {
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for (unsigned Idx = 0; Idx < NumParams; ++Idx)
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begin()[Idx] = Params[Idx];
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}
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TemplateParameterList *
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TemplateParameterList::Create(ASTContext &C, SourceLocation TemplateLoc,
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SourceLocation LAngleLoc, Decl **Params,
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unsigned NumParams, SourceLocation RAngleLoc) {
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unsigned Size = sizeof(TemplateParameterList) + sizeof(Decl *) * NumParams;
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unsigned Align = llvm::AlignOf<TemplateParameterList>::Alignment;
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void *Mem = C.Allocate(Size, Align);
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return new (Mem) TemplateParameterList(TemplateLoc, LAngleLoc, Params,
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NumParams, RAngleLoc);
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}
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unsigned TemplateParameterList::getMinRequiredArguments() const {
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unsigned NumRequiredArgs = size();
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iterator Param = const_cast<TemplateParameterList *>(this)->end(),
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ParamBegin = const_cast<TemplateParameterList *>(this)->begin();
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while (Param != ParamBegin) {
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--Param;
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if (!(*Param)->isTemplateParameterPack() &&
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!(isa<TemplateTypeParmDecl>(*Param) &&
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cast<TemplateTypeParmDecl>(*Param)->hasDefaultArgument()) &&
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!(isa<NonTypeTemplateParmDecl>(*Param) &&
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cast<NonTypeTemplateParmDecl>(*Param)->hasDefaultArgument()) &&
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!(isa<TemplateTemplateParmDecl>(*Param) &&
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cast<TemplateTemplateParmDecl>(*Param)->hasDefaultArgument()))
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break;
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--NumRequiredArgs;
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}
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return NumRequiredArgs;
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}
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//===----------------------------------------------------------------------===//
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// TemplateDecl Implementation
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//===----------------------------------------------------------------------===//
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TemplateDecl::~TemplateDecl() {
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}
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//===----------------------------------------------------------------------===//
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// FunctionTemplateDecl Implementation
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//===----------------------------------------------------------------------===//
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FunctionTemplateDecl *FunctionTemplateDecl::Create(ASTContext &C,
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DeclContext *DC,
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SourceLocation L,
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DeclarationName Name,
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TemplateParameterList *Params,
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NamedDecl *Decl) {
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return new (C) FunctionTemplateDecl(DC, L, Name, Params, Decl);
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}
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void FunctionTemplateDecl::Destroy(ASTContext &C) {
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if (Common *CommonPtr = CommonOrPrev.dyn_cast<Common*>()) {
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for (llvm::FoldingSet<FunctionTemplateSpecializationInfo>::iterator
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Spec = CommonPtr->Specializations.begin(),
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SpecEnd = CommonPtr->Specializations.end();
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Spec != SpecEnd; ++Spec)
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C.Deallocate(&*Spec);
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}
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Decl::Destroy(C);
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}
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FunctionTemplateDecl *FunctionTemplateDecl::getCanonicalDecl() {
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FunctionTemplateDecl *FunTmpl = this;
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while (FunTmpl->getPreviousDeclaration())
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FunTmpl = FunTmpl->getPreviousDeclaration();
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return FunTmpl;
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}
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FunctionTemplateDecl::Common *FunctionTemplateDecl::getCommonPtr() {
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// Find the first declaration of this function template.
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FunctionTemplateDecl *First = this;
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while (First->getPreviousDeclaration())
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First = First->getPreviousDeclaration();
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if (First->CommonOrPrev.isNull()) {
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// FIXME: Allocate with the ASTContext
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First->CommonOrPrev = new Common;
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}
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return First->CommonOrPrev.get<Common*>();
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}
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//===----------------------------------------------------------------------===//
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// ClassTemplateDecl Implementation
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//===----------------------------------------------------------------------===//
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ClassTemplateDecl *ClassTemplateDecl::getCanonicalDecl() {
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ClassTemplateDecl *Template = this;
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while (Template->getPreviousDeclaration())
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Template = Template->getPreviousDeclaration();
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return Template;
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}
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ClassTemplateDecl *ClassTemplateDecl::Create(ASTContext &C,
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DeclContext *DC,
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SourceLocation L,
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DeclarationName Name,
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TemplateParameterList *Params,
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NamedDecl *Decl,
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ClassTemplateDecl *PrevDecl) {
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Common *CommonPtr;
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if (PrevDecl)
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CommonPtr = PrevDecl->CommonPtr;
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else
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CommonPtr = new (C) Common;
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return new (C) ClassTemplateDecl(DC, L, Name, Params, Decl, PrevDecl,
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CommonPtr);
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}
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ClassTemplateDecl::~ClassTemplateDecl() {
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assert(CommonPtr == 0 && "ClassTemplateDecl must be explicitly destroyed");
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}
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void ClassTemplateDecl::Destroy(ASTContext& C) {
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if (!PreviousDeclaration) {
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CommonPtr->~Common();
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C.Deallocate((void*)CommonPtr);
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}
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CommonPtr = 0;
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this->~ClassTemplateDecl();
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C.Deallocate((void*)this);
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}
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ClassTemplatePartialSpecializationDecl *
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ClassTemplateDecl::findPartialSpecialization(QualType T) {
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ASTContext &Context = getASTContext();
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typedef llvm::FoldingSet<ClassTemplatePartialSpecializationDecl>::iterator
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partial_spec_iterator;
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for (partial_spec_iterator P = getPartialSpecializations().begin(),
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PEnd = getPartialSpecializations().end();
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P != PEnd; ++P) {
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if (Context.hasSameType(Context.getTypeDeclType(&*P), T))
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return &*P;
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}
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return 0;
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}
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QualType ClassTemplateDecl::getInjectedClassNameType(ASTContext &Context) {
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if (!CommonPtr->InjectedClassNameType.isNull())
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return CommonPtr->InjectedClassNameType;
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// FIXME: n2800 14.6.1p1 should say how the template arguments
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// corresponding to template parameter packs should be pack
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// expansions. We already say that in 14.6.2.1p2, so it would be
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// better to fix that redundancy.
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TemplateParameterList *Params = getTemplateParameters();
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llvm::SmallVector<TemplateArgument, 16> TemplateArgs;
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TemplateArgs.reserve(Params->size());
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for (TemplateParameterList::iterator Param = Params->begin(),
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ParamEnd = Params->end();
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Param != ParamEnd; ++Param) {
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if (isa<TemplateTypeParmDecl>(*Param)) {
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QualType ParamType = Context.getTypeDeclType(cast<TypeDecl>(*Param));
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TemplateArgs.push_back(TemplateArgument((*Param)->getLocation(),
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ParamType));
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} else if (NonTypeTemplateParmDecl *NTTP =
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dyn_cast<NonTypeTemplateParmDecl>(*Param)) {
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Expr *E = new (Context) DeclRefExpr(NTTP, NTTP->getType(),
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NTTP->getLocation(),
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NTTP->getType()->isDependentType(),
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/*Value-dependent=*/true);
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TemplateArgs.push_back(TemplateArgument(E));
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} else {
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TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*Param);
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TemplateArgs.push_back(TemplateArgument(TTP->getLocation(), TTP));
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}
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}
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CommonPtr->InjectedClassNameType
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= Context.getTemplateSpecializationType(TemplateName(this),
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&TemplateArgs[0],
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TemplateArgs.size());
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return CommonPtr->InjectedClassNameType;
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}
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//===----------------------------------------------------------------------===//
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// TemplateTypeParm Allocation/Deallocation Method Implementations
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//===----------------------------------------------------------------------===//
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TemplateTypeParmDecl *
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TemplateTypeParmDecl::Create(ASTContext &C, DeclContext *DC,
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SourceLocation L, unsigned D, unsigned P,
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IdentifierInfo *Id, bool Typename,
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bool ParameterPack) {
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QualType Type = C.getTemplateTypeParmType(D, P, ParameterPack, Id);
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return new (C) TemplateTypeParmDecl(DC, L, Id, Typename, Type, ParameterPack);
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}
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//===----------------------------------------------------------------------===//
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// NonTypeTemplateParmDecl Method Implementations
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//===----------------------------------------------------------------------===//
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NonTypeTemplateParmDecl *
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NonTypeTemplateParmDecl::Create(ASTContext &C, DeclContext *DC,
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SourceLocation L, unsigned D, unsigned P,
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IdentifierInfo *Id, QualType T,
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DeclaratorInfo *DInfo) {
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return new (C) NonTypeTemplateParmDecl(DC, L, D, P, Id, T, DInfo);
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}
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SourceLocation NonTypeTemplateParmDecl::getDefaultArgumentLoc() const {
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return DefaultArgument? DefaultArgument->getSourceRange().getBegin()
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: SourceLocation();
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}
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//===----------------------------------------------------------------------===//
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// TemplateTemplateParmDecl Method Implementations
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//===----------------------------------------------------------------------===//
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TemplateTemplateParmDecl *
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TemplateTemplateParmDecl::Create(ASTContext &C, DeclContext *DC,
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SourceLocation L, unsigned D, unsigned P,
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IdentifierInfo *Id,
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TemplateParameterList *Params) {
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return new (C) TemplateTemplateParmDecl(DC, L, D, P, Id, Params);
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}
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SourceLocation TemplateTemplateParmDecl::getDefaultArgumentLoc() const {
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return DefaultArgument? DefaultArgument->getSourceRange().getBegin()
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: SourceLocation();
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}
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//===----------------------------------------------------------------------===//
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// TemplateArgument Implementation
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//===----------------------------------------------------------------------===//
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TemplateArgument::TemplateArgument(Expr *E) : Kind(Expression) {
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TypeOrValue = reinterpret_cast<uintptr_t>(E);
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StartLoc = E->getSourceRange().getBegin();
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}
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/// \brief Construct a template argument pack.
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void TemplateArgument::setArgumentPack(TemplateArgument *args, unsigned NumArgs,
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bool CopyArgs) {
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assert(isNull() && "Must call setArgumentPack on a null argument");
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Kind = Pack;
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Args.NumArgs = NumArgs;
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Args.CopyArgs = CopyArgs;
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if (!Args.CopyArgs) {
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Args.Args = args;
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return;
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}
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// FIXME: Allocate in ASTContext
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Args.Args = new TemplateArgument[NumArgs];
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for (unsigned I = 0; I != Args.NumArgs; ++I)
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Args.Args[I] = args[I];
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}
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//===----------------------------------------------------------------------===//
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// TemplateArgumentListBuilder Implementation
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//===----------------------------------------------------------------------===//
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void TemplateArgumentListBuilder::Append(const TemplateArgument& Arg) {
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switch (Arg.getKind()) {
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default: break;
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case TemplateArgument::Type:
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assert(Arg.getAsType()->isCanonical() && "Type must be canonical!");
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break;
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}
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assert(NumFlatArgs < MaxFlatArgs && "Argument list builder is full!");
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assert(!StructuredArgs &&
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"Can't append arguments when an argument pack has been added!");
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if (!FlatArgs)
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FlatArgs = new TemplateArgument[MaxFlatArgs];
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FlatArgs[NumFlatArgs++] = Arg;
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}
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void TemplateArgumentListBuilder::BeginPack() {
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assert(!AddingToPack && "Already adding to pack!");
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assert(!StructuredArgs && "Argument list already contains a pack!");
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AddingToPack = true;
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PackBeginIndex = NumFlatArgs;
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}
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void TemplateArgumentListBuilder::EndPack() {
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assert(AddingToPack && "Not adding to pack!");
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assert(!StructuredArgs && "Argument list already contains a pack!");
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AddingToPack = false;
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StructuredArgs = new TemplateArgument[MaxStructuredArgs];
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// First copy the flat entries over to the list (if any)
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for (unsigned I = 0; I != PackBeginIndex; ++I) {
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NumStructuredArgs++;
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StructuredArgs[I] = FlatArgs[I];
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}
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// Next, set the pack.
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TemplateArgument *PackArgs = 0;
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unsigned NumPackArgs = NumFlatArgs - PackBeginIndex;
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if (NumPackArgs)
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PackArgs = &FlatArgs[PackBeginIndex];
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StructuredArgs[NumStructuredArgs++].setArgumentPack(PackArgs, NumPackArgs,
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/*CopyArgs=*/false);
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}
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void TemplateArgumentListBuilder::ReleaseArgs() {
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FlatArgs = 0;
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NumFlatArgs = 0;
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MaxFlatArgs = 0;
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StructuredArgs = 0;
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NumStructuredArgs = 0;
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MaxStructuredArgs = 0;
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}
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//===----------------------------------------------------------------------===//
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// TemplateArgumentList Implementation
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//===----------------------------------------------------------------------===//
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TemplateArgumentList::TemplateArgumentList(ASTContext &Context,
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TemplateArgumentListBuilder &Builder,
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bool TakeArgs)
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: FlatArguments(Builder.getFlatArguments(), TakeArgs),
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NumFlatArguments(Builder.flatSize()),
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StructuredArguments(Builder.getStructuredArguments(), TakeArgs),
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NumStructuredArguments(Builder.structuredSize()) {
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if (!TakeArgs)
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return;
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if (Builder.getStructuredArguments() == Builder.getFlatArguments())
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StructuredArguments.setInt(0);
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Builder.ReleaseArgs();
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}
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TemplateArgumentList::~TemplateArgumentList() {
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// FIXME: Deallocate template arguments
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}
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//===----------------------------------------------------------------------===//
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// ClassTemplateSpecializationDecl Implementation
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//===----------------------------------------------------------------------===//
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ClassTemplateSpecializationDecl::
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ClassTemplateSpecializationDecl(ASTContext &Context, Kind DK,
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DeclContext *DC, SourceLocation L,
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ClassTemplateDecl *SpecializedTemplate,
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TemplateArgumentListBuilder &Builder,
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ClassTemplateSpecializationDecl *PrevDecl)
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: CXXRecordDecl(DK,
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SpecializedTemplate->getTemplatedDecl()->getTagKind(),
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DC, L,
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// FIXME: Should we use DeclarationName for the name of
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// class template specializations?
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SpecializedTemplate->getIdentifier(),
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PrevDecl),
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SpecializedTemplate(SpecializedTemplate),
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TemplateArgs(Context, Builder, /*TakeArgs=*/true),
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SpecializationKind(TSK_Undeclared) {
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}
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ClassTemplateSpecializationDecl *
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ClassTemplateSpecializationDecl::Create(ASTContext &Context,
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DeclContext *DC, SourceLocation L,
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ClassTemplateDecl *SpecializedTemplate,
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TemplateArgumentListBuilder &Builder,
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ClassTemplateSpecializationDecl *PrevDecl) {
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ClassTemplateSpecializationDecl *Result
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= new (Context)ClassTemplateSpecializationDecl(Context,
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ClassTemplateSpecialization,
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DC, L,
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SpecializedTemplate,
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Builder,
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PrevDecl);
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Context.getTypeDeclType(Result, PrevDecl);
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return Result;
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}
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void ClassTemplateSpecializationDecl::Destroy(ASTContext &C) {
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if (SpecializedPartialSpecialization *PartialSpec
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= SpecializedTemplate.dyn_cast<SpecializedPartialSpecialization*>())
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C.Deallocate(PartialSpec);
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CXXRecordDecl::Destroy(C);
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}
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ClassTemplateDecl *
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ClassTemplateSpecializationDecl::getSpecializedTemplate() const {
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if (SpecializedPartialSpecialization *PartialSpec
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= SpecializedTemplate.dyn_cast<SpecializedPartialSpecialization*>())
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return PartialSpec->PartialSpecialization->getSpecializedTemplate();
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return SpecializedTemplate.get<ClassTemplateDecl*>();
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}
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//===----------------------------------------------------------------------===//
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// ClassTemplatePartialSpecializationDecl Implementation
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//===----------------------------------------------------------------------===//
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ClassTemplatePartialSpecializationDecl *
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ClassTemplatePartialSpecializationDecl::
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Create(ASTContext &Context, DeclContext *DC, SourceLocation L,
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TemplateParameterList *Params,
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ClassTemplateDecl *SpecializedTemplate,
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TemplateArgumentListBuilder &Builder,
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ClassTemplatePartialSpecializationDecl *PrevDecl) {
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ClassTemplatePartialSpecializationDecl *Result
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= new (Context)ClassTemplatePartialSpecializationDecl(Context,
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DC, L, Params,
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SpecializedTemplate,
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Builder, PrevDecl);
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Result->setSpecializationKind(TSK_ExplicitSpecialization);
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Context.getTypeDeclType(Result, PrevDecl);
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return Result;
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}
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