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Diffstat (limited to 'contrib/llvm/tools/clang/lib/AST/Decl.cpp')
| -rw-r--r-- | contrib/llvm/tools/clang/lib/AST/Decl.cpp | 1745 |
1 files changed, 1745 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/AST/Decl.cpp b/contrib/llvm/tools/clang/lib/AST/Decl.cpp new file mode 100644 index 0000000..ffdcb47 --- /dev/null +++ b/contrib/llvm/tools/clang/lib/AST/Decl.cpp @@ -0,0 +1,1745 @@ +//===--- Decl.cpp - Declaration AST Node Implementation -------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file implements the Decl subclasses. +// +//===----------------------------------------------------------------------===// + +#include "clang/AST/Decl.h" +#include "clang/AST/DeclCXX.h" +#include "clang/AST/DeclObjC.h" +#include "clang/AST/DeclTemplate.h" +#include "clang/AST/ASTContext.h" +#include "clang/AST/TypeLoc.h" +#include "clang/AST/Stmt.h" +#include "clang/AST/Expr.h" +#include "clang/AST/ExprCXX.h" +#include "clang/AST/PrettyPrinter.h" +#include "clang/Basic/Builtins.h" +#include "clang/Basic/IdentifierTable.h" +#include "clang/Basic/Specifiers.h" +#include "llvm/Support/ErrorHandling.h" + +using namespace clang; + +//===----------------------------------------------------------------------===// +// NamedDecl Implementation +//===----------------------------------------------------------------------===// + +/// \brief Get the most restrictive linkage for the types in the given +/// template parameter list. +static Linkage +getLinkageForTemplateParameterList(const TemplateParameterList *Params) { + Linkage L = ExternalLinkage; + for (TemplateParameterList::const_iterator P = Params->begin(), + PEnd = Params->end(); + P != PEnd; ++P) { + if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) + if (!NTTP->getType()->isDependentType()) { + L = minLinkage(L, NTTP->getType()->getLinkage()); + continue; + } + + if (TemplateTemplateParmDecl *TTP + = dyn_cast<TemplateTemplateParmDecl>(*P)) { + L = minLinkage(L, + getLinkageForTemplateParameterList(TTP->getTemplateParameters())); + } + } + + return L; +} + +/// \brief Get the most restrictive linkage for the types and +/// declarations in the given template argument list. +static Linkage getLinkageForTemplateArgumentList(const TemplateArgument *Args, + unsigned NumArgs) { + Linkage L = ExternalLinkage; + + for (unsigned I = 0; I != NumArgs; ++I) { + switch (Args[I].getKind()) { + case TemplateArgument::Null: + case TemplateArgument::Integral: + case TemplateArgument::Expression: + break; + + case TemplateArgument::Type: + L = minLinkage(L, Args[I].getAsType()->getLinkage()); + break; + + case TemplateArgument::Declaration: + if (NamedDecl *ND = dyn_cast<NamedDecl>(Args[I].getAsDecl())) + L = minLinkage(L, ND->getLinkage()); + if (ValueDecl *VD = dyn_cast<ValueDecl>(Args[I].getAsDecl())) + L = minLinkage(L, VD->getType()->getLinkage()); + break; + + case TemplateArgument::Template: + if (TemplateDecl *Template + = Args[I].getAsTemplate().getAsTemplateDecl()) + L = minLinkage(L, Template->getLinkage()); + break; + + case TemplateArgument::Pack: + L = minLinkage(L, + getLinkageForTemplateArgumentList(Args[I].pack_begin(), + Args[I].pack_size())); + break; + } + } + + return L; +} + +static Linkage getLinkageForNamespaceScopeDecl(const NamedDecl *D) { + assert(D->getDeclContext()->getLookupContext()->isFileContext() && + "Not a name having namespace scope"); + ASTContext &Context = D->getASTContext(); + + // C++ [basic.link]p3: + // A name having namespace scope (3.3.6) has internal linkage if it + // is the name of + // - an object, reference, function or function template that is + // explicitly declared static; or, + // (This bullet corresponds to C99 6.2.2p3.) + if (const VarDecl *Var = dyn_cast<VarDecl>(D)) { + // Explicitly declared static. + if (Var->getStorageClass() == VarDecl::Static) + return InternalLinkage; + + // - an object or reference that is explicitly declared const + // and neither explicitly declared extern nor previously + // declared to have external linkage; or + // (there is no equivalent in C99) + if (Context.getLangOptions().CPlusPlus && + Var->getType().isConstant(Context) && + Var->getStorageClass() != VarDecl::Extern && + Var->getStorageClass() != VarDecl::PrivateExtern) { + bool FoundExtern = false; + for (const VarDecl *PrevVar = Var->getPreviousDeclaration(); + PrevVar && !FoundExtern; + PrevVar = PrevVar->getPreviousDeclaration()) + if (isExternalLinkage(PrevVar->getLinkage())) + FoundExtern = true; + + if (!FoundExtern) + return InternalLinkage; + } + } else if (isa<FunctionDecl>(D) || isa<FunctionTemplateDecl>(D)) { + // C++ [temp]p4: + // A non-member function template can have internal linkage; any + // other template name shall have external linkage. + const FunctionDecl *Function = 0; + if (const FunctionTemplateDecl *FunTmpl + = dyn_cast<FunctionTemplateDecl>(D)) + Function = FunTmpl->getTemplatedDecl(); + else + Function = cast<FunctionDecl>(D); + + // Explicitly declared static. + if (Function->getStorageClass() == FunctionDecl::Static) + return InternalLinkage; + } else if (const FieldDecl *Field = dyn_cast<FieldDecl>(D)) { + // - a data member of an anonymous union. + if (cast<RecordDecl>(Field->getDeclContext())->isAnonymousStructOrUnion()) + return InternalLinkage; + } + + // C++ [basic.link]p4: + + // A name having namespace scope has external linkage if it is the + // name of + // + // - an object or reference, unless it has internal linkage; or + if (const VarDecl *Var = dyn_cast<VarDecl>(D)) { + if (!Context.getLangOptions().CPlusPlus && + (Var->getStorageClass() == VarDecl::Extern || + Var->getStorageClass() == VarDecl::PrivateExtern)) { + // C99 6.2.2p4: + // For an identifier declared with the storage-class specifier + // extern in a scope in which a prior declaration of that + // identifier is visible, if the prior declaration specifies + // internal or external linkage, the linkage of the identifier + // at the later declaration is the same as the linkage + // specified at the prior declaration. If no prior declaration + // is visible, or if the prior declaration specifies no + // linkage, then the identifier has external linkage. + if (const VarDecl *PrevVar = Var->getPreviousDeclaration()) { + if (Linkage L = PrevVar->getLinkage()) + return L; + } + } + + // C99 6.2.2p5: + // If the declaration of an identifier for an object has file + // scope and no storage-class specifier, its linkage is + // external. + if (Var->isInAnonymousNamespace()) + return UniqueExternalLinkage; + + return ExternalLinkage; + } + + // - a function, unless it has internal linkage; or + if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(D)) { + // C99 6.2.2p5: + // If the declaration of an identifier for a function has no + // storage-class specifier, its linkage is determined exactly + // as if it were declared with the storage-class specifier + // extern. + if (!Context.getLangOptions().CPlusPlus && + (Function->getStorageClass() == FunctionDecl::Extern || + Function->getStorageClass() == FunctionDecl::PrivateExtern || + Function->getStorageClass() == FunctionDecl::None)) { + // C99 6.2.2p4: + // For an identifier declared with the storage-class specifier + // extern in a scope in which a prior declaration of that + // identifier is visible, if the prior declaration specifies + // internal or external linkage, the linkage of the identifier + // at the later declaration is the same as the linkage + // specified at the prior declaration. If no prior declaration + // is visible, or if the prior declaration specifies no + // linkage, then the identifier has external linkage. + if (const FunctionDecl *PrevFunc = Function->getPreviousDeclaration()) { + if (Linkage L = PrevFunc->getLinkage()) + return L; + } + } + + if (Function->isInAnonymousNamespace()) + return UniqueExternalLinkage; + + if (FunctionTemplateSpecializationInfo *SpecInfo + = Function->getTemplateSpecializationInfo()) { + Linkage L = SpecInfo->getTemplate()->getLinkage(); + const TemplateArgumentList &TemplateArgs = *SpecInfo->TemplateArguments; + L = minLinkage(L, + getLinkageForTemplateArgumentList( + TemplateArgs.getFlatArgumentList(), + TemplateArgs.flat_size())); + return L; + } + + return ExternalLinkage; + } + + // - a named class (Clause 9), or an unnamed class defined in a + // typedef declaration in which the class has the typedef name + // for linkage purposes (7.1.3); or + // - a named enumeration (7.2), or an unnamed enumeration + // defined in a typedef declaration in which the enumeration + // has the typedef name for linkage purposes (7.1.3); or + if (const TagDecl *Tag = dyn_cast<TagDecl>(D)) + if (Tag->getDeclName() || Tag->getTypedefForAnonDecl()) { + if (Tag->isInAnonymousNamespace()) + return UniqueExternalLinkage; + + // If this is a class template specialization, consider the + // linkage of the template and template arguments. + if (const ClassTemplateSpecializationDecl *Spec + = dyn_cast<ClassTemplateSpecializationDecl>(Tag)) { + const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); + Linkage L = getLinkageForTemplateArgumentList( + TemplateArgs.getFlatArgumentList(), + TemplateArgs.flat_size()); + return minLinkage(L, Spec->getSpecializedTemplate()->getLinkage()); + } + + return ExternalLinkage; + } + + // - an enumerator belonging to an enumeration with external linkage; + if (isa<EnumConstantDecl>(D)) { + Linkage L = cast<NamedDecl>(D->getDeclContext())->getLinkage(); + if (isExternalLinkage(L)) + return L; + } + + // - a template, unless it is a function template that has + // internal linkage (Clause 14); + if (const TemplateDecl *Template = dyn_cast<TemplateDecl>(D)) { + if (D->isInAnonymousNamespace()) + return UniqueExternalLinkage; + + return getLinkageForTemplateParameterList( + Template->getTemplateParameters()); + } + + // - a namespace (7.3), unless it is declared within an unnamed + // namespace. + if (isa<NamespaceDecl>(D) && !D->isInAnonymousNamespace()) + return ExternalLinkage; + + return NoLinkage; +} + +Linkage NamedDecl::getLinkage() const { + + // Objective-C: treat all Objective-C declarations as having external + // linkage. + switch (getKind()) { + default: + break; + case Decl::ObjCAtDefsField: + case Decl::ObjCCategory: + case Decl::ObjCCategoryImpl: + case Decl::ObjCClass: + case Decl::ObjCCompatibleAlias: + case Decl::ObjCForwardProtocol: + case Decl::ObjCImplementation: + case Decl::ObjCInterface: + case Decl::ObjCIvar: + case Decl::ObjCMethod: + case Decl::ObjCProperty: + case Decl::ObjCPropertyImpl: + case Decl::ObjCProtocol: + return ExternalLinkage; + } + + // Handle linkage for namespace-scope names. + if (getDeclContext()->getLookupContext()->isFileContext()) + if (Linkage L = getLinkageForNamespaceScopeDecl(this)) + return L; + + // C++ [basic.link]p5: + // In addition, a member function, static data member, a named + // class or enumeration of class scope, or an unnamed class or + // enumeration defined in a class-scope typedef declaration such + // that the class or enumeration has the typedef name for linkage + // purposes (7.1.3), has external linkage if the name of the class + // has external linkage. + if (getDeclContext()->isRecord() && + (isa<CXXMethodDecl>(this) || isa<VarDecl>(this) || + (isa<TagDecl>(this) && + (getDeclName() || cast<TagDecl>(this)->getTypedefForAnonDecl())))) { + Linkage L = cast<RecordDecl>(getDeclContext())->getLinkage(); + if (isExternalLinkage(L)) + return L; + } + + // C++ [basic.link]p6: + // The name of a function declared in block scope and the name of + // an object declared by a block scope extern declaration have + // linkage. If there is a visible declaration of an entity with + // linkage having the same name and type, ignoring entities + // declared outside the innermost enclosing namespace scope, the + // block scope declaration declares that same entity and receives + // the linkage of the previous declaration. If there is more than + // one such matching entity, the program is ill-formed. Otherwise, + // if no matching entity is found, the block scope entity receives + // external linkage. + if (getLexicalDeclContext()->isFunctionOrMethod()) { + if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(this)) { + if (Function->getPreviousDeclaration()) + if (Linkage L = Function->getPreviousDeclaration()->getLinkage()) + return L; + + if (Function->isInAnonymousNamespace()) + return UniqueExternalLinkage; + + return ExternalLinkage; + } + + if (const VarDecl *Var = dyn_cast<VarDecl>(this)) + if (Var->getStorageClass() == VarDecl::Extern || + Var->getStorageClass() == VarDecl::PrivateExtern) { + if (Var->getPreviousDeclaration()) + if (Linkage L = Var->getPreviousDeclaration()->getLinkage()) + return L; + + if (Var->isInAnonymousNamespace()) + return UniqueExternalLinkage; + + return ExternalLinkage; + } + } + + // C++ [basic.link]p6: + // Names not covered by these rules have no linkage. + return NoLinkage; + } + +std::string NamedDecl::getQualifiedNameAsString() const { + return getQualifiedNameAsString(getASTContext().getLangOptions()); +} + +std::string NamedDecl::getQualifiedNameAsString(const PrintingPolicy &P) const { + const DeclContext *Ctx = getDeclContext(); + + if (Ctx->isFunctionOrMethod()) + return getNameAsString(); + + typedef llvm::SmallVector<const DeclContext *, 8> ContextsTy; + ContextsTy Contexts; + + // Collect contexts. + while (Ctx && isa<NamedDecl>(Ctx)) { + Contexts.push_back(Ctx); + Ctx = Ctx->getParent(); + }; + + std::string QualName; + llvm::raw_string_ostream OS(QualName); + + for (ContextsTy::reverse_iterator I = Contexts.rbegin(), E = Contexts.rend(); + I != E; ++I) { + if (const ClassTemplateSpecializationDecl *Spec + = dyn_cast<ClassTemplateSpecializationDecl>(*I)) { + const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); + std::string TemplateArgsStr + = TemplateSpecializationType::PrintTemplateArgumentList( + TemplateArgs.getFlatArgumentList(), + TemplateArgs.flat_size(), + P); + OS << Spec->getName() << TemplateArgsStr; + } else if (const NamespaceDecl *ND = dyn_cast<NamespaceDecl>(*I)) { + if (ND->isAnonymousNamespace()) + OS << "<anonymous namespace>"; + else + OS << ND; + } else if (const RecordDecl *RD = dyn_cast<RecordDecl>(*I)) { + if (!RD->getIdentifier()) + OS << "<anonymous " << RD->getKindName() << '>'; + else + OS << RD; + } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I)) { + const FunctionProtoType *FT = 0; + if (FD->hasWrittenPrototype()) + FT = dyn_cast<FunctionProtoType>(FD->getType()->getAs<FunctionType>()); + + OS << FD << '('; + if (FT) { + unsigned NumParams = FD->getNumParams(); + for (unsigned i = 0; i < NumParams; ++i) { + if (i) + OS << ", "; + std::string Param; + FD->getParamDecl(i)->getType().getAsStringInternal(Param, P); + OS << Param; + } + + if (FT->isVariadic()) { + if (NumParams > 0) + OS << ", "; + OS << "..."; + } + } + OS << ')'; + } else { + OS << cast<NamedDecl>(*I); + } + OS << "::"; + } + + if (getDeclName()) + OS << this; + else + OS << "<anonymous>"; + + return OS.str(); +} + +bool NamedDecl::declarationReplaces(NamedDecl *OldD) const { + assert(getDeclName() == OldD->getDeclName() && "Declaration name mismatch"); + + // UsingDirectiveDecl's are not really NamedDecl's, and all have same name. + // We want to keep it, unless it nominates same namespace. + if (getKind() == Decl::UsingDirective) { + return cast<UsingDirectiveDecl>(this)->getNominatedNamespace() == + cast<UsingDirectiveDecl>(OldD)->getNominatedNamespace(); + } + + if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(this)) + // For function declarations, we keep track of redeclarations. + return FD->getPreviousDeclaration() == OldD; + + // For function templates, the underlying function declarations are linked. + if (const FunctionTemplateDecl *FunctionTemplate + = dyn_cast<FunctionTemplateDecl>(this)) + if (const FunctionTemplateDecl *OldFunctionTemplate + = dyn_cast<FunctionTemplateDecl>(OldD)) + return FunctionTemplate->getTemplatedDecl() + ->declarationReplaces(OldFunctionTemplate->getTemplatedDecl()); + + // For method declarations, we keep track of redeclarations. + if (isa<ObjCMethodDecl>(this)) + return false; + + if (isa<ObjCInterfaceDecl>(this) && isa<ObjCCompatibleAliasDecl>(OldD)) + return true; + + if (isa<UsingShadowDecl>(this) && isa<UsingShadowDecl>(OldD)) + return cast<UsingShadowDecl>(this)->getTargetDecl() == + cast<UsingShadowDecl>(OldD)->getTargetDecl(); + + // For non-function declarations, if the declarations are of the + // same kind then this must be a redeclaration, or semantic analysis + // would not have given us the new declaration. + return this->getKind() == OldD->getKind(); +} + +bool NamedDecl::hasLinkage() const { + return getLinkage() != NoLinkage; +} + +NamedDecl *NamedDecl::getUnderlyingDecl() { + NamedDecl *ND = this; + while (true) { + if (UsingShadowDecl *UD = dyn_cast<UsingShadowDecl>(ND)) + ND = UD->getTargetDecl(); + else if (ObjCCompatibleAliasDecl *AD + = dyn_cast<ObjCCompatibleAliasDecl>(ND)) + return AD->getClassInterface(); + else + return ND; + } +} + +bool NamedDecl::isCXXInstanceMember() const { + assert(isCXXClassMember() && + "checking whether non-member is instance member"); + + const NamedDecl *D = this; + if (isa<UsingShadowDecl>(D)) + D = cast<UsingShadowDecl>(D)->getTargetDecl(); + + if (isa<FieldDecl>(D)) + return true; + if (isa<CXXMethodDecl>(D)) + return cast<CXXMethodDecl>(D)->isInstance(); + if (isa<FunctionTemplateDecl>(D)) + return cast<CXXMethodDecl>(cast<FunctionTemplateDecl>(D) + ->getTemplatedDecl())->isInstance(); + return false; +} + +//===----------------------------------------------------------------------===// +// DeclaratorDecl Implementation +//===----------------------------------------------------------------------===// + +DeclaratorDecl::~DeclaratorDecl() {} +void DeclaratorDecl::Destroy(ASTContext &C) { + if (hasExtInfo()) + C.Deallocate(getExtInfo()); + ValueDecl::Destroy(C); +} + +SourceLocation DeclaratorDecl::getTypeSpecStartLoc() const { + if (DeclInfo) { + TypeLoc TL = getTypeSourceInfo()->getTypeLoc(); + while (true) { + TypeLoc NextTL = TL.getNextTypeLoc(); + if (!NextTL) + return TL.getLocalSourceRange().getBegin(); + TL = NextTL; + } + } + return SourceLocation(); +} + +void DeclaratorDecl::setQualifierInfo(NestedNameSpecifier *Qualifier, + SourceRange QualifierRange) { + if (Qualifier) { + // Make sure the extended decl info is allocated. + if (!hasExtInfo()) { + // Save (non-extended) type source info pointer. + TypeSourceInfo *savedTInfo = DeclInfo.get<TypeSourceInfo*>(); + // Allocate external info struct. + DeclInfo = new (getASTContext()) ExtInfo; + // Restore savedTInfo into (extended) decl info. + getExtInfo()->TInfo = savedTInfo; + } + // Set qualifier info. + getExtInfo()->NNS = Qualifier; + getExtInfo()->NNSRange = QualifierRange; + } + else { + // Here Qualifier == 0, i.e., we are removing the qualifier (if any). + assert(QualifierRange.isInvalid()); + if (hasExtInfo()) { + // Save type source info pointer. + TypeSourceInfo *savedTInfo = getExtInfo()->TInfo; + // Deallocate the extended decl info. + getASTContext().Deallocate(getExtInfo()); + // Restore savedTInfo into (non-extended) decl info. + DeclInfo = savedTInfo; + } + } +} + +//===----------------------------------------------------------------------===// +// VarDecl Implementation +//===----------------------------------------------------------------------===// + +const char *VarDecl::getStorageClassSpecifierString(StorageClass SC) { + switch (SC) { + case VarDecl::None: break; + case VarDecl::Auto: return "auto"; break; + case VarDecl::Extern: return "extern"; break; + case VarDecl::PrivateExtern: return "__private_extern__"; break; + case VarDecl::Register: return "register"; break; + case VarDecl::Static: return "static"; break; + } + + assert(0 && "Invalid storage class"); + return 0; +} + +VarDecl *VarDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L, + IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, + StorageClass S, StorageClass SCAsWritten) { + return new (C) VarDecl(Var, DC, L, Id, T, TInfo, S, SCAsWritten); +} + +void VarDecl::Destroy(ASTContext& C) { + Expr *Init = getInit(); + if (Init) { + Init->Destroy(C); + if (EvaluatedStmt *Eval = this->Init.dyn_cast<EvaluatedStmt *>()) { + Eval->~EvaluatedStmt(); + C.Deallocate(Eval); + } + } + this->~VarDecl(); + DeclaratorDecl::Destroy(C); +} + +VarDecl::~VarDecl() { +} + +SourceRange VarDecl::getSourceRange() const { + SourceLocation Start = getTypeSpecStartLoc(); + if (Start.isInvalid()) + Start = getLocation(); + + if (getInit()) + return SourceRange(Start, getInit()->getLocEnd()); + return SourceRange(Start, getLocation()); +} + +bool VarDecl::isExternC() const { + ASTContext &Context = getASTContext(); + if (!Context.getLangOptions().CPlusPlus) + return (getDeclContext()->isTranslationUnit() && + getStorageClass() != Static) || + (getDeclContext()->isFunctionOrMethod() && hasExternalStorage()); + + for (const DeclContext *DC = getDeclContext(); !DC->isTranslationUnit(); + DC = DC->getParent()) { + if (const LinkageSpecDecl *Linkage = dyn_cast<LinkageSpecDecl>(DC)) { + if (Linkage->getLanguage() == LinkageSpecDecl::lang_c) + return getStorageClass() != Static; + + break; + } + + if (DC->isFunctionOrMethod()) + return false; + } + + return false; +} + +VarDecl *VarDecl::getCanonicalDecl() { + return getFirstDeclaration(); +} + +VarDecl::DefinitionKind VarDecl::isThisDeclarationADefinition() const { + // C++ [basic.def]p2: + // A declaration is a definition unless [...] it contains the 'extern' + // specifier or a linkage-specification and neither an initializer [...], + // it declares a static data member in a class declaration [...]. + // C++ [temp.expl.spec]p15: + // An explicit specialization of a static data member of a template is a + // definition if the declaration includes an initializer; otherwise, it is + // a declaration. + if (isStaticDataMember()) { + if (isOutOfLine() && (hasInit() || + getTemplateSpecializationKind() != TSK_ExplicitSpecialization)) + return Definition; + else + return DeclarationOnly; + } + // C99 6.7p5: + // A definition of an identifier is a declaration for that identifier that + // [...] causes storage to be reserved for that object. + // Note: that applies for all non-file-scope objects. + // C99 6.9.2p1: + // If the declaration of an identifier for an object has file scope and an + // initializer, the declaration is an external definition for the identifier + if (hasInit()) + return Definition; + // AST for 'extern "C" int foo;' is annotated with 'extern'. + if (hasExternalStorage()) + return DeclarationOnly; + + // C99 6.9.2p2: + // A declaration of an object that has file scope without an initializer, + // and without a storage class specifier or the scs 'static', constitutes + // a tentative definition. + // No such thing in C++. + if (!getASTContext().getLangOptions().CPlusPlus && isFileVarDecl()) + return TentativeDefinition; + + // What's left is (in C, block-scope) declarations without initializers or + // external storage. These are definitions. + return Definition; +} + +VarDecl *VarDecl::getActingDefinition() { + DefinitionKind Kind = isThisDeclarationADefinition(); + if (Kind != TentativeDefinition) + return 0; + + VarDecl *LastTentative = false; + VarDecl *First = getFirstDeclaration(); + for (redecl_iterator I = First->redecls_begin(), E = First->redecls_end(); + I != E; ++I) { + Kind = (*I)->isThisDeclarationADefinition(); + if (Kind == Definition) + return 0; + else if (Kind == TentativeDefinition) + LastTentative = *I; + } + return LastTentative; +} + +bool VarDecl::isTentativeDefinitionNow() const { + DefinitionKind Kind = isThisDeclarationADefinition(); + if (Kind != TentativeDefinition) + return false; + + for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) { + if ((*I)->isThisDeclarationADefinition() == Definition) + return false; + } + return true; +} + +VarDecl *VarDecl::getDefinition() { + VarDecl *First = getFirstDeclaration(); + for (redecl_iterator I = First->redecls_begin(), E = First->redecls_end(); + I != E; ++I) { + if ((*I)->isThisDeclarationADefinition() == Definition) + return *I; + } + return 0; +} + +const Expr *VarDecl::getAnyInitializer(const VarDecl *&D) const { + redecl_iterator I = redecls_begin(), E = redecls_end(); + while (I != E && !I->getInit()) + ++I; + + if (I != E) { + D = *I; + return I->getInit(); + } + return 0; +} + +bool VarDecl::isOutOfLine() const { + if (Decl::isOutOfLine()) + return true; + + if (!isStaticDataMember()) + return false; + + // If this static data member was instantiated from a static data member of + // a class template, check whether that static data member was defined + // out-of-line. + if (VarDecl *VD = getInstantiatedFromStaticDataMember()) + return VD->isOutOfLine(); + + return false; +} + +VarDecl *VarDecl::getOutOfLineDefinition() { + if (!isStaticDataMember()) + return 0; + + for (VarDecl::redecl_iterator RD = redecls_begin(), RDEnd = redecls_end(); + RD != RDEnd; ++RD) { + if (RD->getLexicalDeclContext()->isFileContext()) + return *RD; + } + + return 0; +} + +void VarDecl::setInit(Expr *I) { + if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>()) { + Eval->~EvaluatedStmt(); + getASTContext().Deallocate(Eval); + } + + Init = I; +} + +VarDecl *VarDecl::getInstantiatedFromStaticDataMember() const { + if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) + return cast<VarDecl>(MSI->getInstantiatedFrom()); + + return 0; +} + +TemplateSpecializationKind VarDecl::getTemplateSpecializationKind() const { + if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) + return MSI->getTemplateSpecializationKind(); + + return TSK_Undeclared; +} + +MemberSpecializationInfo *VarDecl::getMemberSpecializationInfo() const { + return getASTContext().getInstantiatedFromStaticDataMember(this); +} + +void VarDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, + SourceLocation PointOfInstantiation) { + MemberSpecializationInfo *MSI = getMemberSpecializationInfo(); + assert(MSI && "Not an instantiated static data member?"); + MSI->setTemplateSpecializationKind(TSK); + if (TSK != TSK_ExplicitSpecialization && + PointOfInstantiation.isValid() && + MSI->getPointOfInstantiation().isInvalid()) + MSI->setPointOfInstantiation(PointOfInstantiation); +} + +//===----------------------------------------------------------------------===// +// ParmVarDecl Implementation +//===----------------------------------------------------------------------===// + +ParmVarDecl *ParmVarDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation L, IdentifierInfo *Id, + QualType T, TypeSourceInfo *TInfo, + StorageClass S, StorageClass SCAsWritten, + Expr *DefArg) { + return new (C) ParmVarDecl(ParmVar, DC, L, Id, T, TInfo, + S, SCAsWritten, DefArg); +} + +Expr *ParmVarDecl::getDefaultArg() { + assert(!hasUnparsedDefaultArg() && "Default argument is not yet parsed!"); + assert(!hasUninstantiatedDefaultArg() && + "Default argument is not yet instantiated!"); + + Expr *Arg = getInit(); + if (CXXExprWithTemporaries *E = dyn_cast_or_null<CXXExprWithTemporaries>(Arg)) + return E->getSubExpr(); + + return Arg; +} + +unsigned ParmVarDecl::getNumDefaultArgTemporaries() const { + if (const CXXExprWithTemporaries *E = + dyn_cast<CXXExprWithTemporaries>(getInit())) + return E->getNumTemporaries(); + + return 0; +} + +CXXTemporary *ParmVarDecl::getDefaultArgTemporary(unsigned i) { + assert(getNumDefaultArgTemporaries() && + "Default arguments does not have any temporaries!"); + + CXXExprWithTemporaries *E = cast<CXXExprWithTemporaries>(getInit()); + return E->getTemporary(i); +} + +SourceRange ParmVarDecl::getDefaultArgRange() const { + if (const Expr *E = getInit()) + return E->getSourceRange(); + + if (hasUninstantiatedDefaultArg()) + return getUninstantiatedDefaultArg()->getSourceRange(); + + return SourceRange(); +} + +//===----------------------------------------------------------------------===// +// FunctionDecl Implementation +//===----------------------------------------------------------------------===// + +void FunctionDecl::Destroy(ASTContext& C) { + if (Body && Body.isOffset()) + Body.get(C.getExternalSource())->Destroy(C); + + for (param_iterator I=param_begin(), E=param_end(); I!=E; ++I) + (*I)->Destroy(C); + + FunctionTemplateSpecializationInfo *FTSInfo + = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>(); + if (FTSInfo) + C.Deallocate(FTSInfo); + + MemberSpecializationInfo *MSInfo + = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>(); + if (MSInfo) + C.Deallocate(MSInfo); + + C.Deallocate(ParamInfo); + + DeclaratorDecl::Destroy(C); +} + +void FunctionDecl::getNameForDiagnostic(std::string &S, + const PrintingPolicy &Policy, + bool Qualified) const { + NamedDecl::getNameForDiagnostic(S, Policy, Qualified); + const TemplateArgumentList *TemplateArgs = getTemplateSpecializationArgs(); + if (TemplateArgs) + S += TemplateSpecializationType::PrintTemplateArgumentList( + TemplateArgs->getFlatArgumentList(), + TemplateArgs->flat_size(), + Policy); + +} + +bool FunctionDecl::isVariadic() const { + if (const FunctionProtoType *FT = getType()->getAs<FunctionProtoType>()) + return FT->isVariadic(); + return false; +} + +Stmt *FunctionDecl::getBody(const FunctionDecl *&Definition) const { + for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) { + if (I->Body) { + Definition = *I; + return I->Body.get(getASTContext().getExternalSource()); + } + } + + return 0; +} + +void FunctionDecl::setBody(Stmt *B) { + Body = B; + if (B) + EndRangeLoc = B->getLocEnd(); +} + +bool FunctionDecl::isMain() const { + ASTContext &Context = getASTContext(); + return !Context.getLangOptions().Freestanding && + getDeclContext()->getLookupContext()->isTranslationUnit() && + getIdentifier() && getIdentifier()->isStr("main"); +} + +bool FunctionDecl::isExternC() const { + ASTContext &Context = getASTContext(); + // In C, any non-static, non-overloadable function has external + // linkage. + if (!Context.getLangOptions().CPlusPlus) + return getStorageClass() != Static && !getAttr<OverloadableAttr>(); + + for (const DeclContext *DC = getDeclContext(); !DC->isTranslationUnit(); + DC = DC->getParent()) { + if (const LinkageSpecDecl *Linkage = dyn_cast<LinkageSpecDecl>(DC)) { + if (Linkage->getLanguage() == LinkageSpecDecl::lang_c) + return getStorageClass() != Static && + !getAttr<OverloadableAttr>(); + + break; + } + } + + return false; +} + +bool FunctionDecl::isGlobal() const { + if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(this)) + return Method->isStatic(); + + if (getStorageClass() == Static) + return false; + + for (const DeclContext *DC = getDeclContext(); + DC->isNamespace(); + DC = DC->getParent()) { + if (const NamespaceDecl *Namespace = cast<NamespaceDecl>(DC)) { + if (!Namespace->getDeclName()) + return false; + break; + } + } + + return true; +} + +void +FunctionDecl::setPreviousDeclaration(FunctionDecl *PrevDecl) { + redeclarable_base::setPreviousDeclaration(PrevDecl); + + if (FunctionTemplateDecl *FunTmpl = getDescribedFunctionTemplate()) { + FunctionTemplateDecl *PrevFunTmpl + = PrevDecl? PrevDecl->getDescribedFunctionTemplate() : 0; + assert((!PrevDecl || PrevFunTmpl) && "Function/function template mismatch"); + FunTmpl->setPreviousDeclaration(PrevFunTmpl); + } +} + +const FunctionDecl *FunctionDecl::getCanonicalDecl() const { + return getFirstDeclaration(); +} + +FunctionDecl *FunctionDecl::getCanonicalDecl() { + return getFirstDeclaration(); +} + +/// \brief Returns a value indicating whether this function +/// corresponds to a builtin function. +/// +/// The function corresponds to a built-in function if it is +/// declared at translation scope or within an extern "C" block and +/// its name matches with the name of a builtin. The returned value +/// will be 0 for functions that do not correspond to a builtin, a +/// value of type \c Builtin::ID if in the target-independent range +/// \c [1,Builtin::First), or a target-specific builtin value. +unsigned FunctionDecl::getBuiltinID() const { + ASTContext &Context = getASTContext(); + if (!getIdentifier() || !getIdentifier()->getBuiltinID()) + return 0; + + unsigned BuiltinID = getIdentifier()->getBuiltinID(); + if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) + return BuiltinID; + + // This function has the name of a known C library + // function. Determine whether it actually refers to the C library + // function or whether it just has the same name. + + // If this is a static function, it's not a builtin. + if (getStorageClass() == Static) + return 0; + + // If this function is at translation-unit scope and we're not in + // C++, it refers to the C library function. + if (!Context.getLangOptions().CPlusPlus && + getDeclContext()->isTranslationUnit()) + return BuiltinID; + + // If the function is in an extern "C" linkage specification and is + // not marked "overloadable", it's the real function. + if (isa<LinkageSpecDecl>(getDeclContext()) && + cast<LinkageSpecDecl>(getDeclContext())->getLanguage() + == LinkageSpecDecl::lang_c && + !getAttr<OverloadableAttr>()) + return BuiltinID; + + // Not a builtin + return 0; +} + + +/// getNumParams - Return the number of parameters this function must have +/// based on its FunctionType. This is the length of the PararmInfo array +/// after it has been created. +unsigned FunctionDecl::getNumParams() const { + const FunctionType *FT = getType()->getAs<FunctionType>(); + if (isa<FunctionNoProtoType>(FT)) + return 0; + return cast<FunctionProtoType>(FT)->getNumArgs(); + +} + +void FunctionDecl::setParams(ParmVarDecl **NewParamInfo, unsigned NumParams) { + assert(ParamInfo == 0 && "Already has param info!"); + assert(NumParams == getNumParams() && "Parameter count mismatch!"); + + // Zero params -> null pointer. + if (NumParams) { + void *Mem = getASTContext().Allocate(sizeof(ParmVarDecl*)*NumParams); + ParamInfo = new (Mem) ParmVarDecl*[NumParams]; + memcpy(ParamInfo, NewParamInfo, sizeof(ParmVarDecl*)*NumParams); + + // Update source range. The check below allows us to set EndRangeLoc before + // setting the parameters. + if (EndRangeLoc.isInvalid() || EndRangeLoc == getLocation()) + EndRangeLoc = NewParamInfo[NumParams-1]->getLocEnd(); + } +} + +/// getMinRequiredArguments - Returns the minimum number of arguments +/// needed to call this function. This may be fewer than the number of +/// function parameters, if some of the parameters have default +/// arguments (in C++). +unsigned FunctionDecl::getMinRequiredArguments() const { + unsigned NumRequiredArgs = getNumParams(); + while (NumRequiredArgs > 0 + && getParamDecl(NumRequiredArgs-1)->hasDefaultArg()) + --NumRequiredArgs; + + return NumRequiredArgs; +} + +bool FunctionDecl::isInlined() const { + // FIXME: This is not enough. Consider: + // + // inline void f(); + // void f() { } + // + // f is inlined, but does not have inline specified. + // To fix this we should add an 'inline' flag to FunctionDecl. + if (isInlineSpecified()) + return true; + + if (isa<CXXMethodDecl>(this)) { + if (!isOutOfLine() || getCanonicalDecl()->isInlineSpecified()) + return true; + } + + switch (getTemplateSpecializationKind()) { + case TSK_Undeclared: + case TSK_ExplicitSpecialization: + return false; + + case TSK_ImplicitInstantiation: + case TSK_ExplicitInstantiationDeclaration: + case TSK_ExplicitInstantiationDefinition: + // Handle below. + break; + } + + const FunctionDecl *PatternDecl = getTemplateInstantiationPattern(); + Stmt *Pattern = 0; + if (PatternDecl) + Pattern = PatternDecl->getBody(PatternDecl); + + if (Pattern && PatternDecl) + return PatternDecl->isInlined(); + + return false; +} + +/// \brief For an inline function definition in C or C++, determine whether the +/// definition will be externally visible. +/// +/// Inline function definitions are always available for inlining optimizations. +/// However, depending on the language dialect, declaration specifiers, and +/// attributes, the definition of an inline function may or may not be +/// "externally" visible to other translation units in the program. +/// +/// In C99, inline definitions are not externally visible by default. However, +/// if even one of the global-scope declarations is marked "extern inline", the +/// inline definition becomes externally visible (C99 6.7.4p6). +/// +/// In GNU89 mode, or if the gnu_inline attribute is attached to the function +/// definition, we use the GNU semantics for inline, which are nearly the +/// opposite of C99 semantics. In particular, "inline" by itself will create +/// an externally visible symbol, but "extern inline" will not create an +/// externally visible symbol. +bool FunctionDecl::isInlineDefinitionExternallyVisible() const { + assert(isThisDeclarationADefinition() && "Must have the function definition"); + assert(isInlined() && "Function must be inline"); + ASTContext &Context = getASTContext(); + + if (!Context.getLangOptions().C99 || hasAttr<GNUInlineAttr>()) { + // GNU inline semantics. Based on a number of examples, we came up with the + // following heuristic: if the "inline" keyword is present on a + // declaration of the function but "extern" is not present on that + // declaration, then the symbol is externally visible. Otherwise, the GNU + // "extern inline" semantics applies and the symbol is not externally + // visible. + for (redecl_iterator Redecl = redecls_begin(), RedeclEnd = redecls_end(); + Redecl != RedeclEnd; + ++Redecl) { + if (Redecl->isInlineSpecified() && Redecl->getStorageClass() != Extern) + return true; + } + + // GNU "extern inline" semantics; no externally visible symbol. + return false; + } + + // C99 6.7.4p6: + // [...] If all of the file scope declarations for a function in a + // translation unit include the inline function specifier without extern, + // then the definition in that translation unit is an inline definition. + for (redecl_iterator Redecl = redecls_begin(), RedeclEnd = redecls_end(); + Redecl != RedeclEnd; + ++Redecl) { + // Only consider file-scope declarations in this test. + if (!Redecl->getLexicalDeclContext()->isTranslationUnit()) + continue; + + if (!Redecl->isInlineSpecified() || Redecl->getStorageClass() == Extern) + return true; // Not an inline definition + } + + // C99 6.7.4p6: + // An inline definition does not provide an external definition for the + // function, and does not forbid an external definition in another + // translation unit. + return false; +} + +/// getOverloadedOperator - Which C++ overloaded operator this +/// function represents, if any. +OverloadedOperatorKind FunctionDecl::getOverloadedOperator() const { + if (getDeclName().getNameKind() == DeclarationName::CXXOperatorName) + return getDeclName().getCXXOverloadedOperator(); + else + return OO_None; +} + +/// getLiteralIdentifier - The literal suffix identifier this function +/// represents, if any. +const IdentifierInfo *FunctionDecl::getLiteralIdentifier() const { + if (getDeclName().getNameKind() == DeclarationName::CXXLiteralOperatorName) + return getDeclName().getCXXLiteralIdentifier(); + else + return 0; +} + +FunctionDecl *FunctionDecl::getInstantiatedFromMemberFunction() const { + if (MemberSpecializationInfo *Info = getMemberSpecializationInfo()) + return cast<FunctionDecl>(Info->getInstantiatedFrom()); + + return 0; +} + +MemberSpecializationInfo *FunctionDecl::getMemberSpecializationInfo() const { + return TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>(); +} + +void +FunctionDecl::setInstantiationOfMemberFunction(FunctionDecl *FD, + TemplateSpecializationKind TSK) { + assert(TemplateOrSpecialization.isNull() && + "Member function is already a specialization"); + MemberSpecializationInfo *Info + = new (getASTContext()) MemberSpecializationInfo(FD, TSK); + TemplateOrSpecialization = Info; +} + +bool FunctionDecl::isImplicitlyInstantiable() const { + // If the function is invalid, it can't be implicitly instantiated. + if (isInvalidDecl()) + return false; + + switch (getTemplateSpecializationKind()) { + case TSK_Undeclared: + case TSK_ExplicitSpecialization: + case TSK_ExplicitInstantiationDefinition: + return false; + + case TSK_ImplicitInstantiation: + return true; + + case TSK_ExplicitInstantiationDeclaration: + // Handled below. + break; + } + + // Find the actual template from which we will instantiate. + const FunctionDecl *PatternDecl = getTemplateInstantiationPattern(); + Stmt *Pattern = 0; + if (PatternDecl) + Pattern = PatternDecl->getBody(PatternDecl); + + // C++0x [temp.explicit]p9: + // Except for inline functions, other explicit instantiation declarations + // have the effect of suppressing the implicit instantiation of the entity + // to which they refer. + if (!Pattern || !PatternDecl) + return true; + + return PatternDecl->isInlined(); +} + +FunctionDecl *FunctionDecl::getTemplateInstantiationPattern() const { + if (FunctionTemplateDecl *Primary = getPrimaryTemplate()) { + while (Primary->getInstantiatedFromMemberTemplate()) { + // If we have hit a point where the user provided a specialization of + // this template, we're done looking. + if (Primary->isMemberSpecialization()) + break; + + Primary = Primary->getInstantiatedFromMemberTemplate(); + } + + return Primary->getTemplatedDecl(); + } + + return getInstantiatedFromMemberFunction(); +} + +FunctionTemplateDecl *FunctionDecl::getPrimaryTemplate() const { + if (FunctionTemplateSpecializationInfo *Info + = TemplateOrSpecialization + .dyn_cast<FunctionTemplateSpecializationInfo*>()) { + return Info->Template.getPointer(); + } + return 0; +} + +const TemplateArgumentList * +FunctionDecl::getTemplateSpecializationArgs() const { + if (FunctionTemplateSpecializationInfo *Info + = TemplateOrSpecialization + .dyn_cast<FunctionTemplateSpecializationInfo*>()) { + return Info->TemplateArguments; + } + return 0; +} + +const TemplateArgumentListInfo * +FunctionDecl::getTemplateSpecializationArgsAsWritten() const { + if (FunctionTemplateSpecializationInfo *Info + = TemplateOrSpecialization + .dyn_cast<FunctionTemplateSpecializationInfo*>()) { + return Info->TemplateArgumentsAsWritten; + } + return 0; +} + +void +FunctionDecl::setFunctionTemplateSpecialization(FunctionTemplateDecl *Template, + const TemplateArgumentList *TemplateArgs, + void *InsertPos, + TemplateSpecializationKind TSK, + const TemplateArgumentListInfo *TemplateArgsAsWritten) { + assert(TSK != TSK_Undeclared && + "Must specify the type of function template specialization"); + FunctionTemplateSpecializationInfo *Info + = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>(); + if (!Info) + Info = new (getASTContext()) FunctionTemplateSpecializationInfo; + + Info->Function = this; + Info->Template.setPointer(Template); + Info->Template.setInt(TSK - 1); + Info->TemplateArguments = TemplateArgs; + Info->TemplateArgumentsAsWritten = TemplateArgsAsWritten; + TemplateOrSpecialization = Info; + + // Insert this function template specialization into the set of known + // function template specializations. + if (InsertPos) + Template->getSpecializations().InsertNode(Info, InsertPos); + else { + // Try to insert the new node. If there is an existing node, remove it + // first. + FunctionTemplateSpecializationInfo *Existing + = Template->getSpecializations().GetOrInsertNode(Info); + if (Existing) { + Template->getSpecializations().RemoveNode(Existing); + Template->getSpecializations().GetOrInsertNode(Info); + } + } +} + +void +FunctionDecl::setDependentTemplateSpecialization(ASTContext &Context, + const UnresolvedSetImpl &Templates, + const TemplateArgumentListInfo &TemplateArgs) { + assert(TemplateOrSpecialization.isNull()); + size_t Size = sizeof(DependentFunctionTemplateSpecializationInfo); + Size += Templates.size() * sizeof(FunctionTemplateDecl*); + Size += TemplateArgs.size() * sizeof(TemplateArgumentLoc); + void *Buffer = Context.Allocate(Size); + DependentFunctionTemplateSpecializationInfo *Info = + new (Buffer) DependentFunctionTemplateSpecializationInfo(Templates, + TemplateArgs); + TemplateOrSpecialization = Info; +} + +DependentFunctionTemplateSpecializationInfo:: +DependentFunctionTemplateSpecializationInfo(const UnresolvedSetImpl &Ts, + const TemplateArgumentListInfo &TArgs) + : AngleLocs(TArgs.getLAngleLoc(), TArgs.getRAngleLoc()) { + + d.NumTemplates = Ts.size(); + d.NumArgs = TArgs.size(); + + FunctionTemplateDecl **TsArray = + const_cast<FunctionTemplateDecl**>(getTemplates()); + for (unsigned I = 0, E = Ts.size(); I != E; ++I) + TsArray[I] = cast<FunctionTemplateDecl>(Ts[I]->getUnderlyingDecl()); + + TemplateArgumentLoc *ArgsArray = + const_cast<TemplateArgumentLoc*>(getTemplateArgs()); + for (unsigned I = 0, E = TArgs.size(); I != E; ++I) + new (&ArgsArray[I]) TemplateArgumentLoc(TArgs[I]); +} + +TemplateSpecializationKind FunctionDecl::getTemplateSpecializationKind() const { + // For a function template specialization, query the specialization + // information object. + FunctionTemplateSpecializationInfo *FTSInfo + = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>(); + if (FTSInfo) + return FTSInfo->getTemplateSpecializationKind(); + + MemberSpecializationInfo *MSInfo + = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>(); + if (MSInfo) + return MSInfo->getTemplateSpecializationKind(); + + return TSK_Undeclared; +} + +void +FunctionDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK, + SourceLocation PointOfInstantiation) { + if (FunctionTemplateSpecializationInfo *FTSInfo + = TemplateOrSpecialization.dyn_cast< + FunctionTemplateSpecializationInfo*>()) { + FTSInfo->setTemplateSpecializationKind(TSK); + if (TSK != TSK_ExplicitSpecialization && + PointOfInstantiation.isValid() && + FTSInfo->getPointOfInstantiation().isInvalid()) + FTSInfo->setPointOfInstantiation(PointOfInstantiation); + } else if (MemberSpecializationInfo *MSInfo + = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) { + MSInfo->setTemplateSpecializationKind(TSK); + if (TSK != TSK_ExplicitSpecialization && + PointOfInstantiation.isValid() && + MSInfo->getPointOfInstantiation().isInvalid()) + MSInfo->setPointOfInstantiation(PointOfInstantiation); + } else + assert(false && "Function cannot have a template specialization kind"); +} + +SourceLocation FunctionDecl::getPointOfInstantiation() const { + if (FunctionTemplateSpecializationInfo *FTSInfo + = TemplateOrSpecialization.dyn_cast< + FunctionTemplateSpecializationInfo*>()) + return FTSInfo->getPointOfInstantiation(); + else if (MemberSpecializationInfo *MSInfo + = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) + return MSInfo->getPointOfInstantiation(); + + return SourceLocation(); +} + +bool FunctionDecl::isOutOfLine() const { + if (Decl::isOutOfLine()) + return true; + + // If this function was instantiated from a member function of a + // class template, check whether that member function was defined out-of-line. + if (FunctionDecl *FD = getInstantiatedFromMemberFunction()) { + const FunctionDecl *Definition; + if (FD->getBody(Definition)) + return Definition->isOutOfLine(); + } + + // If this function was instantiated from a function template, + // check whether that function template was defined out-of-line. + if (FunctionTemplateDecl *FunTmpl = getPrimaryTemplate()) { + const FunctionDecl *Definition; + if (FunTmpl->getTemplatedDecl()->getBody(Definition)) + return Definition->isOutOfLine(); + } + + return false; +} + +//===----------------------------------------------------------------------===// +// FieldDecl Implementation +//===----------------------------------------------------------------------===// + +FieldDecl *FieldDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L, + IdentifierInfo *Id, QualType T, + TypeSourceInfo *TInfo, Expr *BW, bool Mutable) { + return new (C) FieldDecl(Decl::Field, DC, L, Id, T, TInfo, BW, Mutable); +} + +bool FieldDecl::isAnonymousStructOrUnion() const { + if (!isImplicit() || getDeclName()) + return false; + + if (const RecordType *Record = getType()->getAs<RecordType>()) + return Record->getDecl()->isAnonymousStructOrUnion(); + + return false; +} + +//===----------------------------------------------------------------------===// +// TagDecl Implementation +//===----------------------------------------------------------------------===// + +void TagDecl::Destroy(ASTContext &C) { + if (hasExtInfo()) + C.Deallocate(getExtInfo()); + TypeDecl::Destroy(C); +} + +SourceRange TagDecl::getSourceRange() const { + SourceLocation E = RBraceLoc.isValid() ? RBraceLoc : getLocation(); + return SourceRange(TagKeywordLoc, E); +} + +TagDecl* TagDecl::getCanonicalDecl() { + return getFirstDeclaration(); +} + +void TagDecl::setTypedefForAnonDecl(TypedefDecl *TDD) { + TypedefDeclOrQualifier = TDD; + if (TypeForDecl) + TypeForDecl->ClearLinkageCache(); +} + +void TagDecl::startDefinition() { + if (TagType *TagT = const_cast<TagType *>(TypeForDecl->getAs<TagType>())) { + TagT->decl.setPointer(this); + TagT->decl.setInt(1); + } else if (InjectedClassNameType *Injected + = const_cast<InjectedClassNameType *>( + TypeForDecl->getAs<InjectedClassNameType>())) { + Injected->Decl = cast<CXXRecordDecl>(this); + } + + if (isa<CXXRecordDecl>(this)) { + CXXRecordDecl *D = cast<CXXRecordDecl>(this); + struct CXXRecordDecl::DefinitionData *Data = + new (getASTContext()) struct CXXRecordDecl::DefinitionData(D); + for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) + cast<CXXRecordDecl>(*I)->DefinitionData = Data; + } +} + +void TagDecl::completeDefinition() { + assert((!isa<CXXRecordDecl>(this) || + cast<CXXRecordDecl>(this)->hasDefinition()) && + "definition completed but not started"); + + IsDefinition = true; + if (TagType *TagT = const_cast<TagType *>(TypeForDecl->getAs<TagType>())) { + assert(TagT->decl.getPointer() == this && + "Attempt to redefine a tag definition?"); + TagT->decl.setInt(0); + } else if (InjectedClassNameType *Injected + = const_cast<InjectedClassNameType *>( + TypeForDecl->getAs<InjectedClassNameType>())) { + assert(Injected->Decl == this && + "Attempt to redefine a class template definition?"); + (void)Injected; + } +} + +TagDecl* TagDecl::getDefinition() const { + if (isDefinition()) + return const_cast<TagDecl *>(this); + + for (redecl_iterator R = redecls_begin(), REnd = redecls_end(); + R != REnd; ++R) + if (R->isDefinition()) + return *R; + + return 0; +} + +void TagDecl::setQualifierInfo(NestedNameSpecifier *Qualifier, + SourceRange QualifierRange) { + if (Qualifier) { + // Make sure the extended qualifier info is allocated. + if (!hasExtInfo()) + TypedefDeclOrQualifier = new (getASTContext()) ExtInfo; + // Set qualifier info. + getExtInfo()->NNS = Qualifier; + getExtInfo()->NNSRange = QualifierRange; + } + else { + // Here Qualifier == 0, i.e., we are removing the qualifier (if any). + assert(QualifierRange.isInvalid()); + if (hasExtInfo()) { + getASTContext().Deallocate(getExtInfo()); + TypedefDeclOrQualifier = (TypedefDecl*) 0; + } + } +} + +//===----------------------------------------------------------------------===// +// EnumDecl Implementation +//===----------------------------------------------------------------------===// + +EnumDecl *EnumDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L, + IdentifierInfo *Id, SourceLocation TKL, + EnumDecl *PrevDecl) { + EnumDecl *Enum = new (C) EnumDecl(DC, L, Id, PrevDecl, TKL); + C.getTypeDeclType(Enum, PrevDecl); + return Enum; +} + +void EnumDecl::Destroy(ASTContext& C) { + TagDecl::Destroy(C); +} + +void EnumDecl::completeDefinition(QualType NewType, + QualType NewPromotionType, + unsigned NumPositiveBits, + unsigned NumNegativeBits) { + assert(!isDefinition() && "Cannot redefine enums!"); + IntegerType = NewType; + PromotionType = NewPromotionType; + setNumPositiveBits(NumPositiveBits); + setNumNegativeBits(NumNegativeBits); + TagDecl::completeDefinition(); +} + +//===----------------------------------------------------------------------===// +// RecordDecl Implementation +//===----------------------------------------------------------------------===// + +RecordDecl::RecordDecl(Kind DK, TagKind TK, DeclContext *DC, SourceLocation L, + IdentifierInfo *Id, RecordDecl *PrevDecl, + SourceLocation TKL) + : TagDecl(DK, TK, DC, L, Id, PrevDecl, TKL) { + HasFlexibleArrayMember = false; + AnonymousStructOrUnion = false; + HasObjectMember = false; + assert(classof(static_cast<Decl*>(this)) && "Invalid Kind!"); +} + +RecordDecl *RecordDecl::Create(ASTContext &C, TagKind TK, DeclContext *DC, + SourceLocation L, IdentifierInfo *Id, + SourceLocation TKL, RecordDecl* PrevDecl) { + + RecordDecl* R = new (C) RecordDecl(Record, TK, DC, L, Id, PrevDecl, TKL); + C.getTypeDeclType(R, PrevDecl); + return R; +} + +RecordDecl::~RecordDecl() { +} + +void RecordDecl::Destroy(ASTContext& C) { + TagDecl::Destroy(C); +} + +bool RecordDecl::isInjectedClassName() const { + return isImplicit() && getDeclName() && getDeclContext()->isRecord() && + cast<RecordDecl>(getDeclContext())->getDeclName() == getDeclName(); +} + +/// completeDefinition - Notes that the definition of this type is now +/// complete. +void RecordDecl::completeDefinition() { + assert(!isDefinition() && "Cannot redefine record!"); + TagDecl::completeDefinition(); +} + +ValueDecl *RecordDecl::getAnonymousStructOrUnionObject() { + // Force the decl chain to come into existence properly. + if (!getNextDeclInContext()) getParent()->decls_begin(); + + assert(isAnonymousStructOrUnion()); + ValueDecl *D = cast<ValueDecl>(getNextDeclInContext()); + assert(D->getType()->isRecordType()); + assert(D->getType()->getAs<RecordType>()->getDecl() == this); + return D; +} + +//===----------------------------------------------------------------------===// +// BlockDecl Implementation +//===----------------------------------------------------------------------===// + +BlockDecl::~BlockDecl() { +} + +void BlockDecl::Destroy(ASTContext& C) { + if (Body) + Body->Destroy(C); + + for (param_iterator I=param_begin(), E=param_end(); I!=E; ++I) + (*I)->Destroy(C); + + C.Deallocate(ParamInfo); + Decl::Destroy(C); +} + +void BlockDecl::setParams(ParmVarDecl **NewParamInfo, + unsigned NParms) { + assert(ParamInfo == 0 && "Already has param info!"); + + // Zero params -> null pointer. + if (NParms) { + NumParams = NParms; + void *Mem = getASTContext().Allocate(sizeof(ParmVarDecl*)*NumParams); + ParamInfo = new (Mem) ParmVarDecl*[NumParams]; + memcpy(ParamInfo, NewParamInfo, sizeof(ParmVarDecl*)*NumParams); + } +} + +unsigned BlockDecl::getNumParams() const { + return NumParams; +} + + +//===----------------------------------------------------------------------===// +// Other Decl Allocation/Deallocation Method Implementations +//===----------------------------------------------------------------------===// + +TranslationUnitDecl *TranslationUnitDecl::Create(ASTContext &C) { + return new (C) TranslationUnitDecl(C); +} + +NamespaceDecl *NamespaceDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation L, IdentifierInfo *Id) { + return new (C) NamespaceDecl(DC, L, Id); +} + +void NamespaceDecl::Destroy(ASTContext& C) { + // NamespaceDecl uses "NextDeclarator" to chain namespace declarations + // together. They are all top-level Decls. + + this->~NamespaceDecl(); + Decl::Destroy(C); +} + + +ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation L, IdentifierInfo *Id, QualType T) { + return new (C) ImplicitParamDecl(ImplicitParam, DC, L, Id, T); +} + +FunctionDecl *FunctionDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation L, + DeclarationName N, QualType T, + TypeSourceInfo *TInfo, + StorageClass S, StorageClass SCAsWritten, + bool isInline, bool hasWrittenPrototype) { + FunctionDecl *New = new (C) FunctionDecl(Function, DC, L, N, T, TInfo, + S, SCAsWritten, isInline); + New->HasWrittenPrototype = hasWrittenPrototype; + return New; +} + +BlockDecl *BlockDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) { + return new (C) BlockDecl(DC, L); +} + +EnumConstantDecl *EnumConstantDecl::Create(ASTContext &C, EnumDecl *CD, + SourceLocation L, + IdentifierInfo *Id, QualType T, + Expr *E, const llvm::APSInt &V) { + return new (C) EnumConstantDecl(CD, L, Id, T, E, V); +} + +void EnumConstantDecl::Destroy(ASTContext& C) { + if (Init) Init->Destroy(C); + ValueDecl::Destroy(C); +} + +TypedefDecl *TypedefDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation L, IdentifierInfo *Id, + TypeSourceInfo *TInfo) { + return new (C) TypedefDecl(DC, L, Id, TInfo); +} + +// Anchor TypedefDecl's vtable here. +TypedefDecl::~TypedefDecl() {} + +FileScopeAsmDecl *FileScopeAsmDecl::Create(ASTContext &C, DeclContext *DC, + SourceLocation L, + StringLiteral *Str) { + return new (C) FileScopeAsmDecl(DC, L, Str); +} |
