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authored <ed@FreeBSD.org>2009-06-02 17:58:47 +0000
committered <ed@FreeBSD.org>2009-06-02 17:58:47 +0000
commitf27e5a09a0d815b8a4814152954ff87dadfdefc0 (patch)
treece7d964cbb5e39695b71481698f10cb099c23d4a /lib/Sema/SemaTemplateInstantiateDecl.cpp
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Import Clang, at r72732.
Diffstat (limited to 'lib/Sema/SemaTemplateInstantiateDecl.cpp')
-rw-r--r--lib/Sema/SemaTemplateInstantiateDecl.cpp767
1 files changed, 767 insertions, 0 deletions
diff --git a/lib/Sema/SemaTemplateInstantiateDecl.cpp b/lib/Sema/SemaTemplateInstantiateDecl.cpp
new file mode 100644
index 0000000..6d7dc2e
--- /dev/null
+++ b/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -0,0 +1,767 @@
+//===--- SemaTemplateInstantiateDecl.cpp - C++ Template Decl Instantiation ===/
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//===----------------------------------------------------------------------===/
+//
+// This file implements C++ template instantiation for declarations.
+//
+//===----------------------------------------------------------------------===/
+#include "Sema.h"
+#include "clang/AST/ASTConsumer.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/DeclTemplate.h"
+#include "clang/AST/DeclVisitor.h"
+#include "clang/AST/Expr.h"
+#include "llvm/Support/Compiler.h"
+
+using namespace clang;
+
+namespace {
+ class VISIBILITY_HIDDEN TemplateDeclInstantiator
+ : public DeclVisitor<TemplateDeclInstantiator, Decl *> {
+ Sema &SemaRef;
+ DeclContext *Owner;
+ const TemplateArgumentList &TemplateArgs;
+
+ public:
+ typedef Sema::OwningExprResult OwningExprResult;
+
+ TemplateDeclInstantiator(Sema &SemaRef, DeclContext *Owner,
+ const TemplateArgumentList &TemplateArgs)
+ : SemaRef(SemaRef), Owner(Owner), TemplateArgs(TemplateArgs) { }
+
+ // FIXME: Once we get closer to completion, replace these manually-written
+ // declarations with automatically-generated ones from
+ // clang/AST/DeclNodes.def.
+ Decl *VisitTranslationUnitDecl(TranslationUnitDecl *D);
+ Decl *VisitNamespaceDecl(NamespaceDecl *D);
+ Decl *VisitTypedefDecl(TypedefDecl *D);
+ Decl *VisitVarDecl(VarDecl *D);
+ Decl *VisitFieldDecl(FieldDecl *D);
+ Decl *VisitStaticAssertDecl(StaticAssertDecl *D);
+ Decl *VisitEnumDecl(EnumDecl *D);
+ Decl *VisitEnumConstantDecl(EnumConstantDecl *D);
+ Decl *VisitCXXRecordDecl(CXXRecordDecl *D);
+ Decl *VisitCXXMethodDecl(CXXMethodDecl *D);
+ Decl *VisitCXXConstructorDecl(CXXConstructorDecl *D);
+ Decl *VisitCXXDestructorDecl(CXXDestructorDecl *D);
+ Decl *VisitCXXConversionDecl(CXXConversionDecl *D);
+ ParmVarDecl *VisitParmVarDecl(ParmVarDecl *D);
+ Decl *VisitOriginalParmVarDecl(OriginalParmVarDecl *D);
+
+ // Base case. FIXME: Remove once we can instantiate everything.
+ Decl *VisitDecl(Decl *) {
+ assert(false && "Template instantiation of unknown declaration kind!");
+ return 0;
+ }
+
+ // Helper functions for instantiating methods.
+ QualType InstantiateFunctionType(FunctionDecl *D,
+ llvm::SmallVectorImpl<ParmVarDecl *> &Params);
+ bool InitMethodInstantiation(CXXMethodDecl *New, CXXMethodDecl *Tmpl);
+ };
+}
+
+Decl *
+TemplateDeclInstantiator::VisitTranslationUnitDecl(TranslationUnitDecl *D) {
+ assert(false && "Translation units cannot be instantiated");
+ return D;
+}
+
+Decl *
+TemplateDeclInstantiator::VisitNamespaceDecl(NamespaceDecl *D) {
+ assert(false && "Namespaces cannot be instantiated");
+ return D;
+}
+
+Decl *TemplateDeclInstantiator::VisitTypedefDecl(TypedefDecl *D) {
+ bool Invalid = false;
+ QualType T = D->getUnderlyingType();
+ if (T->isDependentType()) {
+ T = SemaRef.InstantiateType(T, TemplateArgs,
+ D->getLocation(), D->getDeclName());
+ if (T.isNull()) {
+ Invalid = true;
+ T = SemaRef.Context.IntTy;
+ }
+ }
+
+ // Create the new typedef
+ TypedefDecl *Typedef
+ = TypedefDecl::Create(SemaRef.Context, Owner, D->getLocation(),
+ D->getIdentifier(), T);
+ if (Invalid)
+ Typedef->setInvalidDecl();
+
+ Owner->addDecl(SemaRef.Context, Typedef);
+
+ return Typedef;
+}
+
+Decl *TemplateDeclInstantiator::VisitVarDecl(VarDecl *D) {
+ // Instantiate the type of the declaration
+ QualType T = SemaRef.InstantiateType(D->getType(), TemplateArgs,
+ D->getTypeSpecStartLoc(),
+ D->getDeclName());
+ if (T.isNull())
+ return 0;
+
+ // Build the instantiated declaration
+ VarDecl *Var = VarDecl::Create(SemaRef.Context, Owner,
+ D->getLocation(), D->getIdentifier(),
+ T, D->getStorageClass(),
+ D->getTypeSpecStartLoc());
+ Var->setThreadSpecified(D->isThreadSpecified());
+ Var->setCXXDirectInitializer(D->hasCXXDirectInitializer());
+ Var->setDeclaredInCondition(D->isDeclaredInCondition());
+
+ // FIXME: In theory, we could have a previous declaration for variables that
+ // are not static data members.
+ bool Redeclaration = false;
+ SemaRef.CheckVariableDeclaration(Var, 0, Redeclaration);
+ Owner->addDecl(SemaRef.Context, Var);
+
+ if (D->getInit()) {
+ OwningExprResult Init
+ = SemaRef.InstantiateExpr(D->getInit(), TemplateArgs);
+ if (Init.isInvalid())
+ Var->setInvalidDecl();
+ else
+ SemaRef.AddInitializerToDecl(Sema::DeclPtrTy::make(Var), move(Init),
+ D->hasCXXDirectInitializer());
+ } else {
+ // FIXME: Call ActOnUninitializedDecl? (Not always)
+ }
+
+ return Var;
+}
+
+Decl *TemplateDeclInstantiator::VisitFieldDecl(FieldDecl *D) {
+ bool Invalid = false;
+ QualType T = D->getType();
+ if (T->isDependentType()) {
+ T = SemaRef.InstantiateType(T, TemplateArgs,
+ D->getLocation(), D->getDeclName());
+ if (!T.isNull() && T->isFunctionType()) {
+ // C++ [temp.arg.type]p3:
+ // If a declaration acquires a function type through a type
+ // dependent on a template-parameter and this causes a
+ // declaration that does not use the syntactic form of a
+ // function declarator to have function type, the program is
+ // ill-formed.
+ SemaRef.Diag(D->getLocation(), diag::err_field_instantiates_to_function)
+ << T;
+ T = QualType();
+ Invalid = true;
+ }
+ }
+
+ Expr *BitWidth = D->getBitWidth();
+ if (Invalid)
+ BitWidth = 0;
+ else if (BitWidth) {
+ OwningExprResult InstantiatedBitWidth
+ = SemaRef.InstantiateExpr(BitWidth, TemplateArgs);
+ if (InstantiatedBitWidth.isInvalid()) {
+ Invalid = true;
+ BitWidth = 0;
+ } else
+ BitWidth = InstantiatedBitWidth.takeAs<Expr>();
+ }
+
+ FieldDecl *Field = SemaRef.CheckFieldDecl(D->getDeclName(), T,
+ cast<RecordDecl>(Owner),
+ D->getLocation(),
+ D->isMutable(),
+ BitWidth,
+ D->getAccess(),
+ 0);
+ if (Field) {
+ if (Invalid)
+ Field->setInvalidDecl();
+
+ Owner->addDecl(SemaRef.Context, Field);
+ }
+
+ return Field;
+}
+
+Decl *TemplateDeclInstantiator::VisitStaticAssertDecl(StaticAssertDecl *D) {
+ Expr *AssertExpr = D->getAssertExpr();
+
+ OwningExprResult InstantiatedAssertExpr
+ = SemaRef.InstantiateExpr(AssertExpr, TemplateArgs);
+ if (InstantiatedAssertExpr.isInvalid())
+ return 0;
+
+ OwningExprResult Message = SemaRef.Clone(D->getMessage());
+ Decl *StaticAssert
+ = SemaRef.ActOnStaticAssertDeclaration(D->getLocation(),
+ move(InstantiatedAssertExpr),
+ move(Message)).getAs<Decl>();
+ return StaticAssert;
+}
+
+Decl *TemplateDeclInstantiator::VisitEnumDecl(EnumDecl *D) {
+ EnumDecl *Enum = EnumDecl::Create(SemaRef.Context, Owner,
+ D->getLocation(), D->getIdentifier(),
+ /*PrevDecl=*/0);
+ Enum->setInstantiationOfMemberEnum(D);
+ Enum->setAccess(D->getAccess());
+ Owner->addDecl(SemaRef.Context, Enum);
+ Enum->startDefinition();
+
+ llvm::SmallVector<Sema::DeclPtrTy, 4> Enumerators;
+
+ EnumConstantDecl *LastEnumConst = 0;
+ for (EnumDecl::enumerator_iterator EC = D->enumerator_begin(SemaRef.Context),
+ ECEnd = D->enumerator_end(SemaRef.Context);
+ EC != ECEnd; ++EC) {
+ // The specified value for the enumerator.
+ OwningExprResult Value = SemaRef.Owned((Expr *)0);
+ if (Expr *UninstValue = EC->getInitExpr())
+ Value = SemaRef.InstantiateExpr(UninstValue, TemplateArgs);
+
+ // Drop the initial value and continue.
+ bool isInvalid = false;
+ if (Value.isInvalid()) {
+ Value = SemaRef.Owned((Expr *)0);
+ isInvalid = true;
+ }
+
+ EnumConstantDecl *EnumConst
+ = SemaRef.CheckEnumConstant(Enum, LastEnumConst,
+ EC->getLocation(), EC->getIdentifier(),
+ move(Value));
+
+ if (isInvalid) {
+ if (EnumConst)
+ EnumConst->setInvalidDecl();
+ Enum->setInvalidDecl();
+ }
+
+ if (EnumConst) {
+ Enum->addDecl(SemaRef.Context, EnumConst);
+ Enumerators.push_back(Sema::DeclPtrTy::make(EnumConst));
+ LastEnumConst = EnumConst;
+ }
+ }
+
+ // FIXME: Fixup LBraceLoc and RBraceLoc
+ SemaRef.ActOnEnumBody(Enum->getLocation(), SourceLocation(), SourceLocation(),
+ Sema::DeclPtrTy::make(Enum),
+ &Enumerators[0], Enumerators.size());
+
+ return Enum;
+}
+
+Decl *TemplateDeclInstantiator::VisitEnumConstantDecl(EnumConstantDecl *D) {
+ assert(false && "EnumConstantDecls can only occur within EnumDecls.");
+ return 0;
+}
+
+Decl *TemplateDeclInstantiator::VisitCXXRecordDecl(CXXRecordDecl *D) {
+ CXXRecordDecl *PrevDecl = 0;
+ if (D->isInjectedClassName())
+ PrevDecl = cast<CXXRecordDecl>(Owner);
+
+ CXXRecordDecl *Record
+ = CXXRecordDecl::Create(SemaRef.Context, D->getTagKind(), Owner,
+ D->getLocation(), D->getIdentifier(), PrevDecl);
+ Record->setImplicit(D->isImplicit());
+ Record->setAccess(D->getAccess());
+ if (!D->isInjectedClassName())
+ Record->setInstantiationOfMemberClass(D);
+
+ Owner->addDecl(SemaRef.Context, Record);
+ return Record;
+}
+
+Decl *TemplateDeclInstantiator::VisitCXXMethodDecl(CXXMethodDecl *D) {
+ // Only handle actual methods; we'll deal with constructors,
+ // destructors, etc. separately.
+ if (D->getKind() != Decl::CXXMethod)
+ return 0;
+
+ Sema::LocalInstantiationScope Scope(SemaRef);
+
+ llvm::SmallVector<ParmVarDecl *, 4> Params;
+ QualType T = InstantiateFunctionType(D, Params);
+ if (T.isNull())
+ return 0;
+
+ // Build the instantiated method declaration.
+ CXXRecordDecl *Record = cast<CXXRecordDecl>(Owner);
+ CXXMethodDecl *Method
+ = CXXMethodDecl::Create(SemaRef.Context, Record, D->getLocation(),
+ D->getDeclName(), T, D->isStatic(),
+ D->isInline());
+ Method->setInstantiationOfMemberFunction(D);
+
+ // Attach the parameters
+ for (unsigned P = 0; P < Params.size(); ++P)
+ Params[P]->setOwningFunction(Method);
+ Method->setParams(SemaRef.Context, Params.data(), Params.size());
+
+ if (InitMethodInstantiation(Method, D))
+ Method->setInvalidDecl();
+
+ NamedDecl *PrevDecl
+ = SemaRef.LookupQualifiedName(Owner, Method->getDeclName(),
+ Sema::LookupOrdinaryName, true);
+ // In C++, the previous declaration we find might be a tag type
+ // (class or enum). In this case, the new declaration will hide the
+ // tag type. Note that this does does not apply if we're declaring a
+ // typedef (C++ [dcl.typedef]p4).
+ if (PrevDecl && PrevDecl->getIdentifierNamespace() == Decl::IDNS_Tag)
+ PrevDecl = 0;
+ bool Redeclaration = false;
+ bool OverloadableAttrRequired = false;
+ SemaRef.CheckFunctionDeclaration(Method, PrevDecl, Redeclaration,
+ /*FIXME:*/OverloadableAttrRequired);
+
+ if (!Method->isInvalidDecl() || !PrevDecl)
+ Owner->addDecl(SemaRef.Context, Method);
+ return Method;
+}
+
+Decl *TemplateDeclInstantiator::VisitCXXConstructorDecl(CXXConstructorDecl *D) {
+ Sema::LocalInstantiationScope Scope(SemaRef);
+
+ llvm::SmallVector<ParmVarDecl *, 4> Params;
+ QualType T = InstantiateFunctionType(D, Params);
+ if (T.isNull())
+ return 0;
+
+ // Build the instantiated method declaration.
+ CXXRecordDecl *Record = cast<CXXRecordDecl>(Owner);
+ QualType ClassTy = SemaRef.Context.getTypeDeclType(Record);
+ DeclarationName Name
+ = SemaRef.Context.DeclarationNames.getCXXConstructorName(
+ SemaRef.Context.getCanonicalType(ClassTy));
+ CXXConstructorDecl *Constructor
+ = CXXConstructorDecl::Create(SemaRef.Context, Record, D->getLocation(),
+ Name, T, D->isExplicit(), D->isInline(),
+ false);
+ Constructor->setInstantiationOfMemberFunction(D);
+
+ // Attach the parameters
+ for (unsigned P = 0; P < Params.size(); ++P)
+ Params[P]->setOwningFunction(Constructor);
+ Constructor->setParams(SemaRef.Context, Params.data(), Params.size());
+
+ if (InitMethodInstantiation(Constructor, D))
+ Constructor->setInvalidDecl();
+
+ NamedDecl *PrevDecl
+ = SemaRef.LookupQualifiedName(Owner, Name, Sema::LookupOrdinaryName, true);
+
+ // In C++, the previous declaration we find might be a tag type
+ // (class or enum). In this case, the new declaration will hide the
+ // tag type. Note that this does does not apply if we're declaring a
+ // typedef (C++ [dcl.typedef]p4).
+ if (PrevDecl && PrevDecl->getIdentifierNamespace() == Decl::IDNS_Tag)
+ PrevDecl = 0;
+ bool Redeclaration = false;
+ bool OverloadableAttrRequired = false;
+ SemaRef.CheckFunctionDeclaration(Constructor, PrevDecl, Redeclaration,
+ /*FIXME:*/OverloadableAttrRequired);
+
+ Record->addedConstructor(SemaRef.Context, Constructor);
+ Owner->addDecl(SemaRef.Context, Constructor);
+ return Constructor;
+}
+
+Decl *TemplateDeclInstantiator::VisitCXXDestructorDecl(CXXDestructorDecl *D) {
+ Sema::LocalInstantiationScope Scope(SemaRef);
+
+ llvm::SmallVector<ParmVarDecl *, 4> Params;
+ QualType T = InstantiateFunctionType(D, Params);
+ if (T.isNull())
+ return 0;
+ assert(Params.size() == 0 && "Destructor with parameters?");
+
+ // Build the instantiated destructor declaration.
+ CXXRecordDecl *Record = cast<CXXRecordDecl>(Owner);
+ QualType ClassTy =
+ SemaRef.Context.getCanonicalType(SemaRef.Context.getTypeDeclType(Record));
+ CXXDestructorDecl *Destructor
+ = CXXDestructorDecl::Create(SemaRef.Context, Record,
+ D->getLocation(),
+ SemaRef.Context.DeclarationNames.getCXXDestructorName(ClassTy),
+ T, D->isInline(), false);
+ Destructor->setInstantiationOfMemberFunction(D);
+ if (InitMethodInstantiation(Destructor, D))
+ Destructor->setInvalidDecl();
+
+ bool Redeclaration = false;
+ bool OverloadableAttrRequired = false;
+ NamedDecl *PrevDecl = 0;
+ SemaRef.CheckFunctionDeclaration(Destructor, PrevDecl, Redeclaration,
+ /*FIXME:*/OverloadableAttrRequired);
+ Owner->addDecl(SemaRef.Context, Destructor);
+ return Destructor;
+}
+
+Decl *TemplateDeclInstantiator::VisitCXXConversionDecl(CXXConversionDecl *D) {
+ Sema::LocalInstantiationScope Scope(SemaRef);
+
+ llvm::SmallVector<ParmVarDecl *, 4> Params;
+ QualType T = InstantiateFunctionType(D, Params);
+ if (T.isNull())
+ return 0;
+ assert(Params.size() == 0 && "Destructor with parameters?");
+
+ // Build the instantiated conversion declaration.
+ CXXRecordDecl *Record = cast<CXXRecordDecl>(Owner);
+ QualType ClassTy = SemaRef.Context.getTypeDeclType(Record);
+ QualType ConvTy
+ = SemaRef.Context.getCanonicalType(T->getAsFunctionType()->getResultType());
+ CXXConversionDecl *Conversion
+ = CXXConversionDecl::Create(SemaRef.Context, Record,
+ D->getLocation(),
+ SemaRef.Context.DeclarationNames.getCXXConversionFunctionName(ConvTy),
+ T, D->isInline(), D->isExplicit());
+ Conversion->setInstantiationOfMemberFunction(D);
+ if (InitMethodInstantiation(Conversion, D))
+ Conversion->setInvalidDecl();
+
+ bool Redeclaration = false;
+ bool OverloadableAttrRequired = false;
+ NamedDecl *PrevDecl = 0;
+ SemaRef.CheckFunctionDeclaration(Conversion, PrevDecl, Redeclaration,
+ /*FIXME:*/OverloadableAttrRequired);
+ Owner->addDecl(SemaRef.Context, Conversion);
+ return Conversion;
+}
+
+ParmVarDecl *TemplateDeclInstantiator::VisitParmVarDecl(ParmVarDecl *D) {
+ QualType OrigT = SemaRef.InstantiateType(D->getOriginalType(), TemplateArgs,
+ D->getLocation(), D->getDeclName());
+ if (OrigT.isNull())
+ return 0;
+
+ QualType T = SemaRef.adjustParameterType(OrigT);
+
+ if (D->getDefaultArg()) {
+ // FIXME: Leave a marker for "uninstantiated" default
+ // arguments. They only get instantiated on demand at the call
+ // site.
+ unsigned DiagID = SemaRef.Diags.getCustomDiagID(Diagnostic::Warning,
+ "sorry, dropping default argument during template instantiation");
+ SemaRef.Diag(D->getDefaultArg()->getSourceRange().getBegin(), DiagID)
+ << D->getDefaultArg()->getSourceRange();
+ }
+
+ // Allocate the parameter
+ ParmVarDecl *Param = 0;
+ if (T == OrigT)
+ Param = ParmVarDecl::Create(SemaRef.Context, Owner, D->getLocation(),
+ D->getIdentifier(), T, D->getStorageClass(),
+ 0);
+ else
+ Param = OriginalParmVarDecl::Create(SemaRef.Context, Owner,
+ D->getLocation(), D->getIdentifier(),
+ T, OrigT, D->getStorageClass(), 0);
+
+ // Note: we don't try to instantiate function parameters until after
+ // we've instantiated the function's type. Therefore, we don't have
+ // to check for 'void' parameter types here.
+ SemaRef.CurrentInstantiationScope->InstantiatedLocal(D, Param);
+ return Param;
+}
+
+Decl *
+TemplateDeclInstantiator::VisitOriginalParmVarDecl(OriginalParmVarDecl *D) {
+ // Since parameter types can decay either before or after
+ // instantiation, we simply treat OriginalParmVarDecls as
+ // ParmVarDecls the same way, and create one or the other depending
+ // on what happens after template instantiation.
+ return VisitParmVarDecl(D);
+}
+
+Decl *Sema::InstantiateDecl(Decl *D, DeclContext *Owner,
+ const TemplateArgumentList &TemplateArgs) {
+ TemplateDeclInstantiator Instantiator(*this, Owner, TemplateArgs);
+ return Instantiator.Visit(D);
+}
+
+/// \brief Instantiates the type of the given function, including
+/// instantiating all of the function parameters.
+///
+/// \param D The function that we will be instantiated
+///
+/// \param Params the instantiated parameter declarations
+
+/// \returns the instantiated function's type if successfull, a NULL
+/// type if there was an error.
+QualType
+TemplateDeclInstantiator::InstantiateFunctionType(FunctionDecl *D,
+ llvm::SmallVectorImpl<ParmVarDecl *> &Params) {
+ bool InvalidDecl = false;
+
+ // Instantiate the function parameters
+ TemplateDeclInstantiator ParamInstantiator(SemaRef, 0, TemplateArgs);
+ llvm::SmallVector<QualType, 4> ParamTys;
+ for (FunctionDecl::param_iterator P = D->param_begin(),
+ PEnd = D->param_end();
+ P != PEnd; ++P) {
+ if (ParmVarDecl *PInst = ParamInstantiator.VisitParmVarDecl(*P)) {
+ if (PInst->getType()->isVoidType()) {
+ SemaRef.Diag(PInst->getLocation(), diag::err_param_with_void_type);
+ PInst->setInvalidDecl();
+ }
+ else if (SemaRef.RequireNonAbstractType(PInst->getLocation(),
+ PInst->getType(),
+ diag::err_abstract_type_in_decl,
+ Sema::AbstractParamType))
+ PInst->setInvalidDecl();
+
+ Params.push_back(PInst);
+ ParamTys.push_back(PInst->getType());
+
+ if (PInst->isInvalidDecl())
+ InvalidDecl = true;
+ } else
+ InvalidDecl = true;
+ }
+
+ // FIXME: Deallocate dead declarations.
+ if (InvalidDecl)
+ return QualType();
+
+ const FunctionProtoType *Proto = D->getType()->getAsFunctionProtoType();
+ assert(Proto && "Missing prototype?");
+ QualType ResultType
+ = SemaRef.InstantiateType(Proto->getResultType(), TemplateArgs,
+ D->getLocation(), D->getDeclName());
+ if (ResultType.isNull())
+ return QualType();
+
+ return SemaRef.BuildFunctionType(ResultType, ParamTys.data(), ParamTys.size(),
+ Proto->isVariadic(), Proto->getTypeQuals(),
+ D->getLocation(), D->getDeclName());
+}
+
+/// \brief Initializes common fields of an instantiated method
+/// declaration (New) from the corresponding fields of its template
+/// (Tmpl).
+///
+/// \returns true if there was an error
+bool
+TemplateDeclInstantiator::InitMethodInstantiation(CXXMethodDecl *New,
+ CXXMethodDecl *Tmpl) {
+ CXXRecordDecl *Record = cast<CXXRecordDecl>(Owner);
+ New->setAccess(Tmpl->getAccess());
+ if (Tmpl->isVirtualAsWritten()) {
+ New->setVirtualAsWritten(true);
+ Record->setAggregate(false);
+ Record->setPOD(false);
+ Record->setPolymorphic(true);
+ }
+ if (Tmpl->isDeleted())
+ New->setDeleted();
+ if (Tmpl->isPure()) {
+ New->setPure();
+ Record->setAbstract(true);
+ }
+
+ // FIXME: attributes
+ // FIXME: New needs a pointer to Tmpl
+ return false;
+}
+
+/// \brief Instantiate the definition of the given function from its
+/// template.
+///
+/// \param Function the already-instantiated declaration of a
+/// function.
+void Sema::InstantiateFunctionDefinition(SourceLocation PointOfInstantiation,
+ FunctionDecl *Function) {
+ // FIXME: make this work for function template specializations, too.
+
+ if (Function->isInvalidDecl())
+ return;
+
+ // Find the function body that we'll be substituting.
+ const FunctionDecl *PatternDecl
+ = Function->getInstantiatedFromMemberFunction();
+ Stmt *Pattern = 0;
+ if (PatternDecl)
+ Pattern = PatternDecl->getBody(Context, PatternDecl);
+
+ if (!Pattern)
+ return;
+
+ InstantiatingTemplate Inst(*this, PointOfInstantiation, Function);
+ if (Inst)
+ return;
+
+ ActOnStartOfFunctionDef(0, DeclPtrTy::make(Function));
+
+ // Introduce a new scope where local variable instantiations will be
+ // recorded.
+ LocalInstantiationScope Scope(*this);
+
+ // Introduce the instantiated function parameters into the local
+ // instantiation scope.
+ for (unsigned I = 0, N = PatternDecl->getNumParams(); I != N; ++I)
+ Scope.InstantiatedLocal(PatternDecl->getParamDecl(I),
+ Function->getParamDecl(I));
+
+ // Enter the scope of this instantiation. We don't use
+ // PushDeclContext because we don't have a scope.
+ DeclContext *PreviousContext = CurContext;
+ CurContext = Function;
+
+ // Instantiate the function body.
+ OwningStmtResult Body
+ = InstantiateStmt(Pattern, getTemplateInstantiationArgs(Function));
+
+ ActOnFinishFunctionBody(DeclPtrTy::make(Function), move(Body),
+ /*IsInstantiation=*/true);
+
+ CurContext = PreviousContext;
+
+ DeclGroupRef DG(Function);
+ Consumer.HandleTopLevelDecl(DG);
+}
+
+/// \brief Instantiate the definition of the given variable from its
+/// template.
+///
+/// \param Var the already-instantiated declaration of a variable.
+void Sema::InstantiateVariableDefinition(VarDecl *Var) {
+ // FIXME: Implement this!
+}
+
+static bool isInstantiationOf(ASTContext &Ctx, NamedDecl *D, Decl *Other) {
+ if (D->getKind() != Other->getKind())
+ return false;
+
+ if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Other))
+ return Ctx.getCanonicalDecl(Record->getInstantiatedFromMemberClass())
+ == Ctx.getCanonicalDecl(D);
+
+ if (FunctionDecl *Function = dyn_cast<FunctionDecl>(Other))
+ return Ctx.getCanonicalDecl(Function->getInstantiatedFromMemberFunction())
+ == Ctx.getCanonicalDecl(D);
+
+ if (EnumDecl *Enum = dyn_cast<EnumDecl>(Other))
+ return Ctx.getCanonicalDecl(Enum->getInstantiatedFromMemberEnum())
+ == Ctx.getCanonicalDecl(D);
+
+ // FIXME: How can we find instantiations of anonymous unions?
+
+ return D->getDeclName() && isa<NamedDecl>(Other) &&
+ D->getDeclName() == cast<NamedDecl>(Other)->getDeclName();
+}
+
+template<typename ForwardIterator>
+static NamedDecl *findInstantiationOf(ASTContext &Ctx,
+ NamedDecl *D,
+ ForwardIterator first,
+ ForwardIterator last) {
+ for (; first != last; ++first)
+ if (isInstantiationOf(Ctx, D, *first))
+ return cast<NamedDecl>(*first);
+
+ return 0;
+}
+
+/// \brief Find the instantiation of the given declaration within the
+/// current instantiation.
+///
+/// This routine is intended to be used when \p D is a declaration
+/// referenced from within a template, that needs to mapped into the
+/// corresponding declaration within an instantiation. For example,
+/// given:
+///
+/// \code
+/// template<typename T>
+/// struct X {
+/// enum Kind {
+/// KnownValue = sizeof(T)
+/// };
+///
+/// bool getKind() const { return KnownValue; }
+/// };
+///
+/// template struct X<int>;
+/// \endcode
+///
+/// In the instantiation of X<int>::getKind(), we need to map the
+/// EnumConstantDecl for KnownValue (which refers to
+/// X<T>::<Kind>::KnownValue) to its instantiation
+/// (X<int>::<Kind>::KnownValue). InstantiateCurrentDeclRef() performs
+/// this mapping from within the instantiation of X<int>.
+NamedDecl * Sema::InstantiateCurrentDeclRef(NamedDecl *D) {
+ DeclContext *ParentDC = D->getDeclContext();
+ if (isa<ParmVarDecl>(D) || ParentDC->isFunctionOrMethod()) {
+ // D is a local of some kind. Look into the map of local
+ // declarations to their instantiations.
+ return cast<NamedDecl>(CurrentInstantiationScope->getInstantiationOf(D));
+ }
+
+ if (NamedDecl *ParentDecl = dyn_cast<NamedDecl>(ParentDC)) {
+ ParentDecl = InstantiateCurrentDeclRef(ParentDecl);
+ if (!ParentDecl)
+ return 0;
+
+ ParentDC = cast<DeclContext>(ParentDecl);
+ }
+
+ if (ParentDC != D->getDeclContext()) {
+ // We performed some kind of instantiation in the parent context,
+ // so now we need to look into the instantiated parent context to
+ // find the instantiation of the declaration D.
+ NamedDecl *Result = 0;
+ if (D->getDeclName()) {
+ DeclContext::lookup_result Found
+ = ParentDC->lookup(Context, D->getDeclName());
+ Result = findInstantiationOf(Context, D, Found.first, Found.second);
+ } else {
+ // Since we don't have a name for the entity we're looking for,
+ // our only option is to walk through all of the declarations to
+ // find that name. This will occur in a few cases:
+ //
+ // - anonymous struct/union within a template
+ // - unnamed class/struct/union/enum within a template
+ //
+ // FIXME: Find a better way to find these instantiations!
+ Result = findInstantiationOf(Context, D,
+ ParentDC->decls_begin(Context),
+ ParentDC->decls_end(Context));
+ }
+ assert(Result && "Unable to find instantiation of declaration!");
+ D = Result;
+ }
+
+ if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(D))
+ if (ClassTemplateDecl *ClassTemplate
+ = Record->getDescribedClassTemplate()) {
+ // When the declaration D was parsed, it referred to the current
+ // instantiation. Therefore, look through the current context,
+ // which contains actual instantiations, to find the
+ // instantiation of the "current instantiation" that D refers
+ // to. Alternatively, we could just instantiate the
+ // injected-class-name with the current template arguments, but
+ // such an instantiation is far more expensive.
+ for (DeclContext *DC = CurContext; !DC->isFileContext();
+ DC = DC->getParent()) {
+ if (ClassTemplateSpecializationDecl *Spec
+ = dyn_cast<ClassTemplateSpecializationDecl>(DC))
+ if (Context.getCanonicalDecl(Spec->getSpecializedTemplate())
+ == Context.getCanonicalDecl(ClassTemplate))
+ return Spec;
+ }
+
+ assert(false &&
+ "Unable to find declaration for the current instantiation");
+ }
+
+ return D;
+}
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