| //===--- DeclBase.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 and DeclContext classes. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/AST/DeclBase.h" |
| #include "clang/AST/Decl.h" |
| #include "clang/AST/DeclContextInternals.h" |
| #include "clang/AST/DeclCXX.h" |
| #include "clang/AST/DeclFriend.h" |
| #include "clang/AST/DeclObjC.h" |
| #include "clang/AST/DeclTemplate.h" |
| #include "clang/AST/DependentDiagnostic.h" |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/ASTMutationListener.h" |
| #include "clang/AST/Attr.h" |
| #include "clang/AST/ExternalASTSource.h" |
| #include "clang/AST/Stmt.h" |
| #include "clang/AST/StmtCXX.h" |
| #include "clang/AST/Type.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "llvm/ADT/DenseMap.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include <algorithm> |
| using namespace clang; |
| |
| //===----------------------------------------------------------------------===// |
| // Statistics |
| //===----------------------------------------------------------------------===// |
| |
| #define DECL(DERIVED, BASE) static int n##DERIVED##s = 0; |
| #define ABSTRACT_DECL(DECL) |
| #include "clang/AST/DeclNodes.inc" |
| |
| void *Decl::AllocateDeserializedDecl(const ASTContext &Context, |
| unsigned ID, |
| unsigned Size) { |
| // Allocate an extra 8 bytes worth of storage, which ensures that the |
| // resulting pointer will still be 8-byte aligned. |
| void *Start = Context.Allocate(Size + 8); |
| void *Result = (char*)Start + 8; |
| |
| unsigned *PrefixPtr = (unsigned *)Result - 2; |
| |
| // Zero out the first 4 bytes; this is used to store the owning module ID. |
| PrefixPtr[0] = 0; |
| |
| // Store the global declaration ID in the second 4 bytes. |
| PrefixPtr[1] = ID; |
| |
| return Result; |
| } |
| |
| const char *Decl::getDeclKindName() const { |
| switch (DeclKind) { |
| default: llvm_unreachable("Declaration not in DeclNodes.inc!"); |
| #define DECL(DERIVED, BASE) case DERIVED: return #DERIVED; |
| #define ABSTRACT_DECL(DECL) |
| #include "clang/AST/DeclNodes.inc" |
| } |
| } |
| |
| void Decl::setInvalidDecl(bool Invalid) { |
| InvalidDecl = Invalid; |
| if (Invalid && !isa<ParmVarDecl>(this)) { |
| // Defensive maneuver for ill-formed code: we're likely not to make it to |
| // a point where we set the access specifier, so default it to "public" |
| // to avoid triggering asserts elsewhere in the front end. |
| setAccess(AS_public); |
| } |
| } |
| |
| const char *DeclContext::getDeclKindName() const { |
| switch (DeclKind) { |
| default: llvm_unreachable("Declaration context not in DeclNodes.inc!"); |
| #define DECL(DERIVED, BASE) case Decl::DERIVED: return #DERIVED; |
| #define ABSTRACT_DECL(DECL) |
| #include "clang/AST/DeclNodes.inc" |
| } |
| } |
| |
| bool Decl::StatisticsEnabled = false; |
| void Decl::EnableStatistics() { |
| StatisticsEnabled = true; |
| } |
| |
| void Decl::PrintStats() { |
| llvm::errs() << "\n*** Decl Stats:\n"; |
| |
| int totalDecls = 0; |
| #define DECL(DERIVED, BASE) totalDecls += n##DERIVED##s; |
| #define ABSTRACT_DECL(DECL) |
| #include "clang/AST/DeclNodes.inc" |
| llvm::errs() << " " << totalDecls << " decls total.\n"; |
| |
| int totalBytes = 0; |
| #define DECL(DERIVED, BASE) \ |
| if (n##DERIVED##s > 0) { \ |
| totalBytes += (int)(n##DERIVED##s * sizeof(DERIVED##Decl)); \ |
| llvm::errs() << " " << n##DERIVED##s << " " #DERIVED " decls, " \ |
| << sizeof(DERIVED##Decl) << " each (" \ |
| << n##DERIVED##s * sizeof(DERIVED##Decl) \ |
| << " bytes)\n"; \ |
| } |
| #define ABSTRACT_DECL(DECL) |
| #include "clang/AST/DeclNodes.inc" |
| |
| llvm::errs() << "Total bytes = " << totalBytes << "\n"; |
| } |
| |
| void Decl::add(Kind k) { |
| switch (k) { |
| #define DECL(DERIVED, BASE) case DERIVED: ++n##DERIVED##s; break; |
| #define ABSTRACT_DECL(DECL) |
| #include "clang/AST/DeclNodes.inc" |
| } |
| } |
| |
| bool Decl::isTemplateParameterPack() const { |
| if (const TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(this)) |
| return TTP->isParameterPack(); |
| if (const NonTypeTemplateParmDecl *NTTP |
| = dyn_cast<NonTypeTemplateParmDecl>(this)) |
| return NTTP->isParameterPack(); |
| if (const TemplateTemplateParmDecl *TTP |
| = dyn_cast<TemplateTemplateParmDecl>(this)) |
| return TTP->isParameterPack(); |
| return false; |
| } |
| |
| bool Decl::isParameterPack() const { |
| if (const ParmVarDecl *Parm = dyn_cast<ParmVarDecl>(this)) |
| return Parm->isParameterPack(); |
| |
| return isTemplateParameterPack(); |
| } |
| |
| bool Decl::isFunctionOrFunctionTemplate() const { |
| if (const UsingShadowDecl *UD = dyn_cast<UsingShadowDecl>(this)) |
| return UD->getTargetDecl()->isFunctionOrFunctionTemplate(); |
| |
| return isa<FunctionDecl>(this) || isa<FunctionTemplateDecl>(this); |
| } |
| |
| bool Decl::isTemplateDecl() const { |
| return isa<TemplateDecl>(this); |
| } |
| |
| const DeclContext *Decl::getParentFunctionOrMethod() const { |
| for (const DeclContext *DC = getDeclContext(); |
| DC && !DC->isTranslationUnit() && !DC->isNamespace(); |
| DC = DC->getParent()) |
| if (DC->isFunctionOrMethod()) |
| return DC; |
| |
| return 0; |
| } |
| |
| |
| //===----------------------------------------------------------------------===// |
| // PrettyStackTraceDecl Implementation |
| //===----------------------------------------------------------------------===// |
| |
| void PrettyStackTraceDecl::print(raw_ostream &OS) const { |
| SourceLocation TheLoc = Loc; |
| if (TheLoc.isInvalid() && TheDecl) |
| TheLoc = TheDecl->getLocation(); |
| |
| if (TheLoc.isValid()) { |
| TheLoc.print(OS, SM); |
| OS << ": "; |
| } |
| |
| OS << Message; |
| |
| if (const NamedDecl *DN = dyn_cast_or_null<NamedDecl>(TheDecl)) |
| OS << " '" << DN->getQualifiedNameAsString() << '\''; |
| OS << '\n'; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Decl Implementation |
| //===----------------------------------------------------------------------===// |
| |
| // Out-of-line virtual method providing a home for Decl. |
| Decl::~Decl() { } |
| |
| void Decl::setDeclContext(DeclContext *DC) { |
| DeclCtx = DC; |
| } |
| |
| void Decl::setLexicalDeclContext(DeclContext *DC) { |
| if (DC == getLexicalDeclContext()) |
| return; |
| |
| if (isInSemaDC()) { |
| setDeclContextsImpl(getDeclContext(), DC, getASTContext()); |
| } else { |
| getMultipleDC()->LexicalDC = DC; |
| } |
| } |
| |
| void Decl::setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC, |
| ASTContext &Ctx) { |
| if (SemaDC == LexicalDC) { |
| DeclCtx = SemaDC; |
| } else { |
| Decl::MultipleDC *MDC = new (Ctx) Decl::MultipleDC(); |
| MDC->SemanticDC = SemaDC; |
| MDC->LexicalDC = LexicalDC; |
| DeclCtx = MDC; |
| } |
| } |
| |
| bool Decl::isInAnonymousNamespace() const { |
| const DeclContext *DC = getDeclContext(); |
| do { |
| if (const NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC)) |
| if (ND->isAnonymousNamespace()) |
| return true; |
| } while ((DC = DC->getParent())); |
| |
| return false; |
| } |
| |
| TranslationUnitDecl *Decl::getTranslationUnitDecl() { |
| if (TranslationUnitDecl *TUD = dyn_cast<TranslationUnitDecl>(this)) |
| return TUD; |
| |
| DeclContext *DC = getDeclContext(); |
| assert(DC && "This decl is not contained in a translation unit!"); |
| |
| while (!DC->isTranslationUnit()) { |
| DC = DC->getParent(); |
| assert(DC && "This decl is not contained in a translation unit!"); |
| } |
| |
| return cast<TranslationUnitDecl>(DC); |
| } |
| |
| ASTContext &Decl::getASTContext() const { |
| return getTranslationUnitDecl()->getASTContext(); |
| } |
| |
| ASTMutationListener *Decl::getASTMutationListener() const { |
| return getASTContext().getASTMutationListener(); |
| } |
| |
| unsigned Decl::getMaxAlignment() const { |
| if (!hasAttrs()) |
| return 0; |
| |
| unsigned Align = 0; |
| const AttrVec &V = getAttrs(); |
| ASTContext &Ctx = getASTContext(); |
| specific_attr_iterator<AlignedAttr> I(V.begin()), E(V.end()); |
| for (; I != E; ++I) |
| Align = std::max(Align, I->getAlignment(Ctx)); |
| return Align; |
| } |
| |
| bool Decl::isUsed(bool CheckUsedAttr) const { |
| if (Used) |
| return true; |
| |
| // Check for used attribute. |
| if (CheckUsedAttr && hasAttr<UsedAttr>()) |
| return true; |
| |
| return false; |
| } |
| |
| bool Decl::isReferenced() const { |
| if (Referenced) |
| return true; |
| |
| // Check redeclarations. |
| for (redecl_iterator I = redecls_begin(), E = redecls_end(); I != E; ++I) |
| if (I->Referenced) |
| return true; |
| |
| return false; |
| } |
| |
| /// \brief Determine the availability of the given declaration based on |
| /// the target platform. |
| /// |
| /// When it returns an availability result other than \c AR_Available, |
| /// if the \p Message parameter is non-NULL, it will be set to a |
| /// string describing why the entity is unavailable. |
| /// |
| /// FIXME: Make these strings localizable, since they end up in |
| /// diagnostics. |
| static AvailabilityResult CheckAvailability(ASTContext &Context, |
| const AvailabilityAttr *A, |
| std::string *Message) { |
| StringRef TargetPlatform = Context.getTargetInfo().getPlatformName(); |
| StringRef PrettyPlatformName |
| = AvailabilityAttr::getPrettyPlatformName(TargetPlatform); |
| if (PrettyPlatformName.empty()) |
| PrettyPlatformName = TargetPlatform; |
| |
| VersionTuple TargetMinVersion = Context.getTargetInfo().getPlatformMinVersion(); |
| if (TargetMinVersion.empty()) |
| return AR_Available; |
| |
| // Match the platform name. |
| if (A->getPlatform()->getName() != TargetPlatform) |
| return AR_Available; |
| |
| std::string HintMessage; |
| if (!A->getMessage().empty()) { |
| HintMessage = " - "; |
| HintMessage += A->getMessage(); |
| } |
| |
| // Make sure that this declaration has not been marked 'unavailable'. |
| if (A->getUnavailable()) { |
| if (Message) { |
| Message->clear(); |
| llvm::raw_string_ostream Out(*Message); |
| Out << "not available on " << PrettyPlatformName |
| << HintMessage; |
| } |
| |
| return AR_Unavailable; |
| } |
| |
| // Make sure that this declaration has already been introduced. |
| if (!A->getIntroduced().empty() && |
| TargetMinVersion < A->getIntroduced()) { |
| if (Message) { |
| Message->clear(); |
| llvm::raw_string_ostream Out(*Message); |
| Out << "introduced in " << PrettyPlatformName << ' ' |
| << A->getIntroduced() << HintMessage; |
| } |
| |
| return AR_NotYetIntroduced; |
| } |
| |
| // Make sure that this declaration hasn't been obsoleted. |
| if (!A->getObsoleted().empty() && TargetMinVersion >= A->getObsoleted()) { |
| if (Message) { |
| Message->clear(); |
| llvm::raw_string_ostream Out(*Message); |
| Out << "obsoleted in " << PrettyPlatformName << ' ' |
| << A->getObsoleted() << HintMessage; |
| } |
| |
| return AR_Unavailable; |
| } |
| |
| // Make sure that this declaration hasn't been deprecated. |
| if (!A->getDeprecated().empty() && TargetMinVersion >= A->getDeprecated()) { |
| if (Message) { |
| Message->clear(); |
| llvm::raw_string_ostream Out(*Message); |
| Out << "first deprecated in " << PrettyPlatformName << ' ' |
| << A->getDeprecated() << HintMessage; |
| } |
| |
| return AR_Deprecated; |
| } |
| |
| return AR_Available; |
| } |
| |
| AvailabilityResult Decl::getAvailability(std::string *Message) const { |
| AvailabilityResult Result = AR_Available; |
| std::string ResultMessage; |
| |
| for (attr_iterator A = attr_begin(), AEnd = attr_end(); A != AEnd; ++A) { |
| if (DeprecatedAttr *Deprecated = dyn_cast<DeprecatedAttr>(*A)) { |
| if (Result >= AR_Deprecated) |
| continue; |
| |
| if (Message) |
| ResultMessage = Deprecated->getMessage(); |
| |
| Result = AR_Deprecated; |
| continue; |
| } |
| |
| if (UnavailableAttr *Unavailable = dyn_cast<UnavailableAttr>(*A)) { |
| if (Message) |
| *Message = Unavailable->getMessage(); |
| return AR_Unavailable; |
| } |
| |
| if (AvailabilityAttr *Availability = dyn_cast<AvailabilityAttr>(*A)) { |
| AvailabilityResult AR = CheckAvailability(getASTContext(), Availability, |
| Message); |
| |
| if (AR == AR_Unavailable) |
| return AR_Unavailable; |
| |
| if (AR > Result) { |
| Result = AR; |
| if (Message) |
| ResultMessage.swap(*Message); |
| } |
| continue; |
| } |
| } |
| |
| if (Message) |
| Message->swap(ResultMessage); |
| return Result; |
| } |
| |
| bool Decl::canBeWeakImported(bool &IsDefinition) const { |
| IsDefinition = false; |
| |
| // Variables, if they aren't definitions. |
| if (const VarDecl *Var = dyn_cast<VarDecl>(this)) { |
| if (!Var->hasExternalStorage() || Var->getInit()) { |
| IsDefinition = true; |
| return false; |
| } |
| return true; |
| |
| // Functions, if they aren't definitions. |
| } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(this)) { |
| if (FD->hasBody()) { |
| IsDefinition = true; |
| return false; |
| } |
| return true; |
| |
| // Objective-C classes, if this is the non-fragile runtime. |
| } else if (isa<ObjCInterfaceDecl>(this) && |
| getASTContext().getLangOpts().ObjCRuntime.hasWeakClassImport()) { |
| return true; |
| |
| // Nothing else. |
| } else { |
| return false; |
| } |
| } |
| |
| bool Decl::isWeakImported() const { |
| bool IsDefinition; |
| if (!canBeWeakImported(IsDefinition)) |
| return false; |
| |
| for (attr_iterator A = attr_begin(), AEnd = attr_end(); A != AEnd; ++A) { |
| if (isa<WeakImportAttr>(*A)) |
| return true; |
| |
| if (AvailabilityAttr *Availability = dyn_cast<AvailabilityAttr>(*A)) { |
| if (CheckAvailability(getASTContext(), Availability, 0) |
| == AR_NotYetIntroduced) |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| unsigned Decl::getIdentifierNamespaceForKind(Kind DeclKind) { |
| switch (DeclKind) { |
| case Function: |
| case CXXMethod: |
| case CXXConstructor: |
| case CXXDestructor: |
| case CXXConversion: |
| case EnumConstant: |
| case Var: |
| case ImplicitParam: |
| case ParmVar: |
| case NonTypeTemplateParm: |
| case ObjCMethod: |
| case ObjCProperty: |
| return IDNS_Ordinary; |
| case Label: |
| return IDNS_Label; |
| case IndirectField: |
| return IDNS_Ordinary | IDNS_Member; |
| |
| case ObjCCompatibleAlias: |
| case ObjCInterface: |
| return IDNS_Ordinary | IDNS_Type; |
| |
| case Typedef: |
| case TypeAlias: |
| case TypeAliasTemplate: |
| case UnresolvedUsingTypename: |
| case TemplateTypeParm: |
| return IDNS_Ordinary | IDNS_Type; |
| |
| case UsingShadow: |
| return 0; // we'll actually overwrite this later |
| |
| case UnresolvedUsingValue: |
| return IDNS_Ordinary | IDNS_Using; |
| |
| case Using: |
| return IDNS_Using; |
| |
| case ObjCProtocol: |
| return IDNS_ObjCProtocol; |
| |
| case Field: |
| case ObjCAtDefsField: |
| case ObjCIvar: |
| return IDNS_Member; |
| |
| case Record: |
| case CXXRecord: |
| case Enum: |
| return IDNS_Tag | IDNS_Type; |
| |
| case Namespace: |
| case NamespaceAlias: |
| return IDNS_Namespace; |
| |
| case FunctionTemplate: |
| return IDNS_Ordinary; |
| |
| case ClassTemplate: |
| case TemplateTemplateParm: |
| return IDNS_Ordinary | IDNS_Tag | IDNS_Type; |
| |
| // Never have names. |
| case Friend: |
| case FriendTemplate: |
| case AccessSpec: |
| case LinkageSpec: |
| case FileScopeAsm: |
| case StaticAssert: |
| case ObjCPropertyImpl: |
| case Block: |
| case TranslationUnit: |
| |
| case UsingDirective: |
| case ClassTemplateSpecialization: |
| case ClassTemplatePartialSpecialization: |
| case ClassScopeFunctionSpecialization: |
| case ObjCImplementation: |
| case ObjCCategory: |
| case ObjCCategoryImpl: |
| case Import: |
| // Never looked up by name. |
| return 0; |
| } |
| |
| llvm_unreachable("Invalid DeclKind!"); |
| } |
| |
| void Decl::setAttrsImpl(const AttrVec &attrs, ASTContext &Ctx) { |
| assert(!HasAttrs && "Decl already contains attrs."); |
| |
| AttrVec &AttrBlank = Ctx.getDeclAttrs(this); |
| assert(AttrBlank.empty() && "HasAttrs was wrong?"); |
| |
| AttrBlank = attrs; |
| HasAttrs = true; |
| } |
| |
| void Decl::dropAttrs() { |
| if (!HasAttrs) return; |
| |
| HasAttrs = false; |
| getASTContext().eraseDeclAttrs(this); |
| } |
| |
| const AttrVec &Decl::getAttrs() const { |
| assert(HasAttrs && "No attrs to get!"); |
| return getASTContext().getDeclAttrs(this); |
| } |
| |
| void Decl::swapAttrs(Decl *RHS) { |
| bool HasLHSAttr = this->HasAttrs; |
| bool HasRHSAttr = RHS->HasAttrs; |
| |
| // Usually, neither decl has attrs, nothing to do. |
| if (!HasLHSAttr && !HasRHSAttr) return; |
| |
| // If 'this' has no attrs, swap the other way. |
| if (!HasLHSAttr) |
| return RHS->swapAttrs(this); |
| |
| ASTContext &Context = getASTContext(); |
| |
| // Handle the case when both decls have attrs. |
| if (HasRHSAttr) { |
| std::swap(Context.getDeclAttrs(this), Context.getDeclAttrs(RHS)); |
| return; |
| } |
| |
| // Otherwise, LHS has an attr and RHS doesn't. |
| Context.getDeclAttrs(RHS) = Context.getDeclAttrs(this); |
| Context.eraseDeclAttrs(this); |
| this->HasAttrs = false; |
| RHS->HasAttrs = true; |
| } |
| |
| Decl *Decl::castFromDeclContext (const DeclContext *D) { |
| Decl::Kind DK = D->getDeclKind(); |
| switch(DK) { |
| #define DECL(NAME, BASE) |
| #define DECL_CONTEXT(NAME) \ |
| case Decl::NAME: \ |
| return static_cast<NAME##Decl*>(const_cast<DeclContext*>(D)); |
| #define DECL_CONTEXT_BASE(NAME) |
| #include "clang/AST/DeclNodes.inc" |
| default: |
| #define DECL(NAME, BASE) |
| #define DECL_CONTEXT_BASE(NAME) \ |
| if (DK >= first##NAME && DK <= last##NAME) \ |
| return static_cast<NAME##Decl*>(const_cast<DeclContext*>(D)); |
| #include "clang/AST/DeclNodes.inc" |
| llvm_unreachable("a decl that inherits DeclContext isn't handled"); |
| } |
| } |
| |
| DeclContext *Decl::castToDeclContext(const Decl *D) { |
| Decl::Kind DK = D->getKind(); |
| switch(DK) { |
| #define DECL(NAME, BASE) |
| #define DECL_CONTEXT(NAME) \ |
| case Decl::NAME: \ |
| return static_cast<NAME##Decl*>(const_cast<Decl*>(D)); |
| #define DECL_CONTEXT_BASE(NAME) |
| #include "clang/AST/DeclNodes.inc" |
| default: |
| #define DECL(NAME, BASE) |
| #define DECL_CONTEXT_BASE(NAME) \ |
| if (DK >= first##NAME && DK <= last##NAME) \ |
| return static_cast<NAME##Decl*>(const_cast<Decl*>(D)); |
| #include "clang/AST/DeclNodes.inc" |
| llvm_unreachable("a decl that inherits DeclContext isn't handled"); |
| } |
| } |
| |
| SourceLocation Decl::getBodyRBrace() const { |
| // Special handling of FunctionDecl to avoid de-serializing the body from PCH. |
| // FunctionDecl stores EndRangeLoc for this purpose. |
| if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(this)) { |
| const FunctionDecl *Definition; |
| if (FD->hasBody(Definition)) |
| return Definition->getSourceRange().getEnd(); |
| return SourceLocation(); |
| } |
| |
| if (Stmt *Body = getBody()) |
| return Body->getSourceRange().getEnd(); |
| |
| return SourceLocation(); |
| } |
| |
| void Decl::CheckAccessDeclContext() const { |
| #ifndef NDEBUG |
| // Suppress this check if any of the following hold: |
| // 1. this is the translation unit (and thus has no parent) |
| // 2. this is a template parameter (and thus doesn't belong to its context) |
| // 3. this is a non-type template parameter |
| // 4. the context is not a record |
| // 5. it's invalid |
| // 6. it's a C++0x static_assert. |
| if (isa<TranslationUnitDecl>(this) || |
| isa<TemplateTypeParmDecl>(this) || |
| isa<NonTypeTemplateParmDecl>(this) || |
| !isa<CXXRecordDecl>(getDeclContext()) || |
| isInvalidDecl() || |
| isa<StaticAssertDecl>(this) || |
| // FIXME: a ParmVarDecl can have ClassTemplateSpecialization |
| // as DeclContext (?). |
| isa<ParmVarDecl>(this) || |
| // FIXME: a ClassTemplateSpecialization or CXXRecordDecl can have |
| // AS_none as access specifier. |
| isa<CXXRecordDecl>(this) || |
| isa<ClassScopeFunctionSpecializationDecl>(this)) |
| return; |
| |
| assert(Access != AS_none && |
| "Access specifier is AS_none inside a record decl"); |
| #endif |
| } |
| |
| DeclContext *Decl::getNonClosureContext() { |
| return getDeclContext()->getNonClosureAncestor(); |
| } |
| |
| DeclContext *DeclContext::getNonClosureAncestor() { |
| DeclContext *DC = this; |
| |
| // This is basically "while (DC->isClosure()) DC = DC->getParent();" |
| // except that it's significantly more efficient to cast to a known |
| // decl type and call getDeclContext() than to call getParent(). |
| while (isa<BlockDecl>(DC)) |
| DC = cast<BlockDecl>(DC)->getDeclContext(); |
| |
| assert(!DC->isClosure()); |
| return DC; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // DeclContext Implementation |
| //===----------------------------------------------------------------------===// |
| |
| bool DeclContext::classof(const Decl *D) { |
| switch (D->getKind()) { |
| #define DECL(NAME, BASE) |
| #define DECL_CONTEXT(NAME) case Decl::NAME: |
| #define DECL_CONTEXT_BASE(NAME) |
| #include "clang/AST/DeclNodes.inc" |
| return true; |
| default: |
| #define DECL(NAME, BASE) |
| #define DECL_CONTEXT_BASE(NAME) \ |
| if (D->getKind() >= Decl::first##NAME && \ |
| D->getKind() <= Decl::last##NAME) \ |
| return true; |
| #include "clang/AST/DeclNodes.inc" |
| return false; |
| } |
| } |
| |
| DeclContext::~DeclContext() { } |
| |
| /// \brief Find the parent context of this context that will be |
| /// used for unqualified name lookup. |
| /// |
| /// Generally, the parent lookup context is the semantic context. However, for |
| /// a friend function the parent lookup context is the lexical context, which |
| /// is the class in which the friend is declared. |
| DeclContext *DeclContext::getLookupParent() { |
| // FIXME: Find a better way to identify friends |
| if (isa<FunctionDecl>(this)) |
| if (getParent()->getRedeclContext()->isFileContext() && |
| getLexicalParent()->getRedeclContext()->isRecord()) |
| return getLexicalParent(); |
| |
| return getParent(); |
| } |
| |
| bool DeclContext::isInlineNamespace() const { |
| return isNamespace() && |
| cast<NamespaceDecl>(this)->isInline(); |
| } |
| |
| bool DeclContext::isDependentContext() const { |
| if (isFileContext()) |
| return false; |
| |
| if (isa<ClassTemplatePartialSpecializationDecl>(this)) |
| return true; |
| |
| if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(this)) { |
| if (Record->getDescribedClassTemplate()) |
| return true; |
| |
| if (Record->isDependentLambda()) |
| return true; |
| } |
| |
| if (const FunctionDecl *Function = dyn_cast<FunctionDecl>(this)) { |
| if (Function->getDescribedFunctionTemplate()) |
| return true; |
| |
| // Friend function declarations are dependent if their *lexical* |
| // context is dependent. |
| if (cast<Decl>(this)->getFriendObjectKind()) |
| return getLexicalParent()->isDependentContext(); |
| } |
| |
| return getParent() && getParent()->isDependentContext(); |
| } |
| |
| bool DeclContext::isTransparentContext() const { |
| if (DeclKind == Decl::Enum) |
| return !cast<EnumDecl>(this)->isScoped(); |
| else if (DeclKind == Decl::LinkageSpec) |
| return true; |
| |
| return false; |
| } |
| |
| bool DeclContext::isExternCContext() const { |
| const DeclContext *DC = this; |
| while (DC->DeclKind != Decl::TranslationUnit) { |
| if (DC->DeclKind == Decl::LinkageSpec) |
| return cast<LinkageSpecDecl>(DC)->getLanguage() |
| == LinkageSpecDecl::lang_c; |
| DC = DC->getParent(); |
| } |
| return false; |
| } |
| |
| bool DeclContext::Encloses(const DeclContext *DC) const { |
| if (getPrimaryContext() != this) |
| return getPrimaryContext()->Encloses(DC); |
| |
| for (; DC; DC = DC->getParent()) |
| if (DC->getPrimaryContext() == this) |
| return true; |
| return false; |
| } |
| |
| DeclContext *DeclContext::getPrimaryContext() { |
| switch (DeclKind) { |
| case Decl::TranslationUnit: |
| case Decl::LinkageSpec: |
| case Decl::Block: |
| // There is only one DeclContext for these entities. |
| return this; |
| |
| case Decl::Namespace: |
| // The original namespace is our primary context. |
| return static_cast<NamespaceDecl*>(this)->getOriginalNamespace(); |
| |
| case Decl::ObjCMethod: |
| return this; |
| |
| case Decl::ObjCInterface: |
| if (ObjCInterfaceDecl *Def = cast<ObjCInterfaceDecl>(this)->getDefinition()) |
| return Def; |
| |
| return this; |
| |
| case Decl::ObjCProtocol: |
| if (ObjCProtocolDecl *Def = cast<ObjCProtocolDecl>(this)->getDefinition()) |
| return Def; |
| |
| return this; |
| |
| case Decl::ObjCCategory: |
| return this; |
| |
| case Decl::ObjCImplementation: |
| case Decl::ObjCCategoryImpl: |
| return this; |
| |
| default: |
| if (DeclKind >= Decl::firstTag && DeclKind <= Decl::lastTag) { |
| // If this is a tag type that has a definition or is currently |
| // being defined, that definition is our primary context. |
| TagDecl *Tag = cast<TagDecl>(this); |
| assert(isa<TagType>(Tag->TypeForDecl) || |
| isa<InjectedClassNameType>(Tag->TypeForDecl)); |
| |
| if (TagDecl *Def = Tag->getDefinition()) |
| return Def; |
| |
| if (!isa<InjectedClassNameType>(Tag->TypeForDecl)) { |
| const TagType *TagTy = cast<TagType>(Tag->TypeForDecl); |
| if (TagTy->isBeingDefined()) |
| // FIXME: is it necessarily being defined in the decl |
| // that owns the type? |
| return TagTy->getDecl(); |
| } |
| |
| return Tag; |
| } |
| |
| assert(DeclKind >= Decl::firstFunction && DeclKind <= Decl::lastFunction && |
| "Unknown DeclContext kind"); |
| return this; |
| } |
| } |
| |
| void |
| DeclContext::collectAllContexts(llvm::SmallVectorImpl<DeclContext *> &Contexts){ |
| Contexts.clear(); |
| |
| if (DeclKind != Decl::Namespace) { |
| Contexts.push_back(this); |
| return; |
| } |
| |
| NamespaceDecl *Self = static_cast<NamespaceDecl *>(this); |
| for (NamespaceDecl *N = Self->getMostRecentDecl(); N; |
| N = N->getPreviousDecl()) |
| Contexts.push_back(N); |
| |
| std::reverse(Contexts.begin(), Contexts.end()); |
| } |
| |
| std::pair<Decl *, Decl *> |
| DeclContext::BuildDeclChain(ArrayRef<Decl*> Decls, |
| bool FieldsAlreadyLoaded) { |
| // Build up a chain of declarations via the Decl::NextInContextAndBits field. |
| Decl *FirstNewDecl = 0; |
| Decl *PrevDecl = 0; |
| for (unsigned I = 0, N = Decls.size(); I != N; ++I) { |
| if (FieldsAlreadyLoaded && isa<FieldDecl>(Decls[I])) |
| continue; |
| |
| Decl *D = Decls[I]; |
| if (PrevDecl) |
| PrevDecl->NextInContextAndBits.setPointer(D); |
| else |
| FirstNewDecl = D; |
| |
| PrevDecl = D; |
| } |
| |
| return std::make_pair(FirstNewDecl, PrevDecl); |
| } |
| |
| /// \brief Load the declarations within this lexical storage from an |
| /// external source. |
| void |
| DeclContext::LoadLexicalDeclsFromExternalStorage() const { |
| ExternalASTSource *Source = getParentASTContext().getExternalSource(); |
| assert(hasExternalLexicalStorage() && Source && "No external storage?"); |
| |
| // Notify that we have a DeclContext that is initializing. |
| ExternalASTSource::Deserializing ADeclContext(Source); |
| |
| // Load the external declarations, if any. |
| SmallVector<Decl*, 64> Decls; |
| ExternalLexicalStorage = false; |
| switch (Source->FindExternalLexicalDecls(this, Decls)) { |
| case ELR_Success: |
| break; |
| |
| case ELR_Failure: |
| case ELR_AlreadyLoaded: |
| return; |
| } |
| |
| if (Decls.empty()) |
| return; |
| |
| // We may have already loaded just the fields of this record, in which case |
| // we need to ignore them. |
| bool FieldsAlreadyLoaded = false; |
| if (const RecordDecl *RD = dyn_cast<RecordDecl>(this)) |
| FieldsAlreadyLoaded = RD->LoadedFieldsFromExternalStorage; |
| |
| // Splice the newly-read declarations into the beginning of the list |
| // of declarations. |
| Decl *ExternalFirst, *ExternalLast; |
| llvm::tie(ExternalFirst, ExternalLast) = BuildDeclChain(Decls, |
| FieldsAlreadyLoaded); |
| ExternalLast->NextInContextAndBits.setPointer(FirstDecl); |
| FirstDecl = ExternalFirst; |
| if (!LastDecl) |
| LastDecl = ExternalLast; |
| } |
| |
| DeclContext::lookup_result |
| ExternalASTSource::SetNoExternalVisibleDeclsForName(const DeclContext *DC, |
| DeclarationName Name) { |
| ASTContext &Context = DC->getParentASTContext(); |
| StoredDeclsMap *Map; |
| if (!(Map = DC->LookupPtr.getPointer())) |
| Map = DC->CreateStoredDeclsMap(Context); |
| |
| StoredDeclsList &List = (*Map)[Name]; |
| assert(List.isNull()); |
| (void) List; |
| |
| return DeclContext::lookup_result(); |
| } |
| |
| DeclContext::lookup_result |
| ExternalASTSource::SetExternalVisibleDeclsForName(const DeclContext *DC, |
| DeclarationName Name, |
| ArrayRef<NamedDecl*> Decls) { |
| ASTContext &Context = DC->getParentASTContext(); |
| |
| StoredDeclsMap *Map; |
| if (!(Map = DC->LookupPtr.getPointer())) |
| Map = DC->CreateStoredDeclsMap(Context); |
| |
| StoredDeclsList &List = (*Map)[Name]; |
| for (ArrayRef<NamedDecl*>::iterator |
| I = Decls.begin(), E = Decls.end(); I != E; ++I) { |
| if (List.isNull()) |
| List.setOnlyValue(*I); |
| else |
| List.AddSubsequentDecl(*I); |
| } |
| |
| return List.getLookupResult(); |
| } |
| |
| DeclContext::decl_iterator DeclContext::noload_decls_begin() const { |
| return decl_iterator(FirstDecl); |
| } |
| |
| DeclContext::decl_iterator DeclContext::decls_begin() const { |
| if (hasExternalLexicalStorage()) |
| LoadLexicalDeclsFromExternalStorage(); |
| |
| return decl_iterator(FirstDecl); |
| } |
| |
| bool DeclContext::decls_empty() const { |
| if (hasExternalLexicalStorage()) |
| LoadLexicalDeclsFromExternalStorage(); |
| |
| return !FirstDecl; |
| } |
| |
| void DeclContext::removeDecl(Decl *D) { |
| assert(D->getLexicalDeclContext() == this && |
| "decl being removed from non-lexical context"); |
| assert((D->NextInContextAndBits.getPointer() || D == LastDecl) && |
| "decl is not in decls list"); |
| |
| // Remove D from the decl chain. This is O(n) but hopefully rare. |
| if (D == FirstDecl) { |
| if (D == LastDecl) |
| FirstDecl = LastDecl = 0; |
| else |
| FirstDecl = D->NextInContextAndBits.getPointer(); |
| } else { |
| for (Decl *I = FirstDecl; true; I = I->NextInContextAndBits.getPointer()) { |
| assert(I && "decl not found in linked list"); |
| if (I->NextInContextAndBits.getPointer() == D) { |
| I->NextInContextAndBits.setPointer(D->NextInContextAndBits.getPointer()); |
| if (D == LastDecl) LastDecl = I; |
| break; |
| } |
| } |
| } |
| |
| // Mark that D is no longer in the decl chain. |
| D->NextInContextAndBits.setPointer(0); |
| |
| // Remove D from the lookup table if necessary. |
| if (isa<NamedDecl>(D)) { |
| NamedDecl *ND = cast<NamedDecl>(D); |
| |
| // Remove only decls that have a name |
| if (!ND->getDeclName()) return; |
| |
| StoredDeclsMap *Map = getPrimaryContext()->LookupPtr.getPointer(); |
| if (!Map) return; |
| |
| StoredDeclsMap::iterator Pos = Map->find(ND->getDeclName()); |
| assert(Pos != Map->end() && "no lookup entry for decl"); |
| if (Pos->second.getAsVector() || Pos->second.getAsDecl() == ND) |
| Pos->second.remove(ND); |
| } |
| } |
| |
| void DeclContext::addHiddenDecl(Decl *D) { |
| assert(D->getLexicalDeclContext() == this && |
| "Decl inserted into wrong lexical context"); |
| assert(!D->getNextDeclInContext() && D != LastDecl && |
| "Decl already inserted into a DeclContext"); |
| |
| if (FirstDecl) { |
| LastDecl->NextInContextAndBits.setPointer(D); |
| LastDecl = D; |
| } else { |
| FirstDecl = LastDecl = D; |
| } |
| |
| // Notify a C++ record declaration that we've added a member, so it can |
| // update it's class-specific state. |
| if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(this)) |
| Record->addedMember(D); |
| |
| // If this is a newly-created (not de-serialized) import declaration, wire |
| // it in to the list of local import declarations. |
| if (!D->isFromASTFile()) { |
| if (ImportDecl *Import = dyn_cast<ImportDecl>(D)) |
| D->getASTContext().addedLocalImportDecl(Import); |
| } |
| } |
| |
| void DeclContext::addDecl(Decl *D) { |
| addHiddenDecl(D); |
| |
| if (NamedDecl *ND = dyn_cast<NamedDecl>(D)) |
| ND->getDeclContext()->getPrimaryContext()-> |
| makeDeclVisibleInContextWithFlags(ND, false, true); |
| } |
| |
| void DeclContext::addDeclInternal(Decl *D) { |
| addHiddenDecl(D); |
| |
| if (NamedDecl *ND = dyn_cast<NamedDecl>(D)) |
| ND->getDeclContext()->getPrimaryContext()-> |
| makeDeclVisibleInContextWithFlags(ND, true, true); |
| } |
| |
| /// shouldBeHidden - Determine whether a declaration which was declared |
| /// within its semantic context should be invisible to qualified name lookup. |
| static bool shouldBeHidden(NamedDecl *D) { |
| // Skip unnamed declarations. |
| if (!D->getDeclName()) |
| return true; |
| |
| // Skip entities that can't be found by name lookup into a particular |
| // context. |
| if ((D->getIdentifierNamespace() == 0 && !isa<UsingDirectiveDecl>(D)) || |
| D->isTemplateParameter()) |
| return true; |
| |
| // Skip template specializations. |
| // FIXME: This feels like a hack. Should DeclarationName support |
| // template-ids, or is there a better way to keep specializations |
| // from being visible? |
| if (isa<ClassTemplateSpecializationDecl>(D)) |
| return true; |
| if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) |
| if (FD->isFunctionTemplateSpecialization()) |
| return true; |
| |
| return false; |
| } |
| |
| /// buildLookup - Build the lookup data structure with all of the |
| /// declarations in this DeclContext (and any other contexts linked |
| /// to it or transparent contexts nested within it) and return it. |
| StoredDeclsMap *DeclContext::buildLookup() { |
| assert(this == getPrimaryContext() && "buildLookup called on non-primary DC"); |
| |
| if (!LookupPtr.getInt()) |
| return LookupPtr.getPointer(); |
| |
| llvm::SmallVector<DeclContext *, 2> Contexts; |
| collectAllContexts(Contexts); |
| for (unsigned I = 0, N = Contexts.size(); I != N; ++I) |
| buildLookupImpl(Contexts[I]); |
| |
| // We no longer have any lazy decls. |
| LookupPtr.setInt(false); |
| return LookupPtr.getPointer(); |
| } |
| |
| /// buildLookupImpl - Build part of the lookup data structure for the |
| /// declarations contained within DCtx, which will either be this |
| /// DeclContext, a DeclContext linked to it, or a transparent context |
| /// nested within it. |
| void DeclContext::buildLookupImpl(DeclContext *DCtx) { |
| for (decl_iterator I = DCtx->decls_begin(), E = DCtx->decls_end(); |
| I != E; ++I) { |
| Decl *D = *I; |
| |
| // Insert this declaration into the lookup structure, but only if |
| // it's semantically within its decl context. Any other decls which |
| // should be found in this context are added eagerly. |
| if (NamedDecl *ND = dyn_cast<NamedDecl>(D)) |
| if (ND->getDeclContext() == DCtx && !shouldBeHidden(ND)) |
| makeDeclVisibleInContextImpl(ND, false); |
| |
| // If this declaration is itself a transparent declaration context |
| // or inline namespace, add the members of this declaration of that |
| // context (recursively). |
| if (DeclContext *InnerCtx = dyn_cast<DeclContext>(D)) |
| if (InnerCtx->isTransparentContext() || InnerCtx->isInlineNamespace()) |
| buildLookupImpl(InnerCtx); |
| } |
| } |
| |
| DeclContext::lookup_result |
| DeclContext::lookup(DeclarationName Name) { |
| assert(DeclKind != Decl::LinkageSpec && |
| "Should not perform lookups into linkage specs!"); |
| |
| DeclContext *PrimaryContext = getPrimaryContext(); |
| if (PrimaryContext != this) |
| return PrimaryContext->lookup(Name); |
| |
| if (hasExternalVisibleStorage()) { |
| // If a PCH has a result for this name, and we have a local declaration, we |
| // will have imported the PCH result when adding the local declaration. |
| // FIXME: For modules, we could have had more declarations added by module |
| // imoprts since we saw the declaration of the local name. |
| if (StoredDeclsMap *Map = LookupPtr.getPointer()) { |
| StoredDeclsMap::iterator I = Map->find(Name); |
| if (I != Map->end()) |
| return I->second.getLookupResult(); |
| } |
| |
| ExternalASTSource *Source = getParentASTContext().getExternalSource(); |
| return Source->FindExternalVisibleDeclsByName(this, Name); |
| } |
| |
| StoredDeclsMap *Map = LookupPtr.getPointer(); |
| if (LookupPtr.getInt()) |
| Map = buildLookup(); |
| |
| if (!Map) |
| return lookup_result(lookup_iterator(0), lookup_iterator(0)); |
| |
| StoredDeclsMap::iterator I = Map->find(Name); |
| if (I == Map->end()) |
| return lookup_result(lookup_iterator(0), lookup_iterator(0)); |
| |
| return I->second.getLookupResult(); |
| } |
| |
| void DeclContext::localUncachedLookup(DeclarationName Name, |
| llvm::SmallVectorImpl<NamedDecl *> &Results) { |
| Results.clear(); |
| |
| // If there's no external storage, just perform a normal lookup and copy |
| // the results. |
| if (!hasExternalVisibleStorage() && !hasExternalLexicalStorage() && Name) { |
| lookup_result LookupResults = lookup(Name); |
| Results.insert(Results.end(), LookupResults.first, LookupResults.second); |
| return; |
| } |
| |
| // If we have a lookup table, check there first. Maybe we'll get lucky. |
| if (Name) { |
| if (StoredDeclsMap *Map = LookupPtr.getPointer()) { |
| StoredDeclsMap::iterator Pos = Map->find(Name); |
| if (Pos != Map->end()) { |
| Results.insert(Results.end(), |
| Pos->second.getLookupResult().first, |
| Pos->second.getLookupResult().second); |
| return; |
| } |
| } |
| } |
| |
| // Slow case: grovel through the declarations in our chain looking for |
| // matches. |
| for (Decl *D = FirstDecl; D; D = D->getNextDeclInContext()) { |
| if (NamedDecl *ND = dyn_cast<NamedDecl>(D)) |
| if (ND->getDeclName() == Name) |
| Results.push_back(ND); |
| } |
| } |
| |
| DeclContext *DeclContext::getRedeclContext() { |
| DeclContext *Ctx = this; |
| // Skip through transparent contexts. |
| while (Ctx->isTransparentContext()) |
| Ctx = Ctx->getParent(); |
| return Ctx; |
| } |
| |
| DeclContext *DeclContext::getEnclosingNamespaceContext() { |
| DeclContext *Ctx = this; |
| // Skip through non-namespace, non-translation-unit contexts. |
| while (!Ctx->isFileContext()) |
| Ctx = Ctx->getParent(); |
| return Ctx->getPrimaryContext(); |
| } |
| |
| bool DeclContext::InEnclosingNamespaceSetOf(const DeclContext *O) const { |
| // For non-file contexts, this is equivalent to Equals. |
| if (!isFileContext()) |
| return O->Equals(this); |
| |
| do { |
| if (O->Equals(this)) |
| return true; |
| |
| const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(O); |
| if (!NS || !NS->isInline()) |
| break; |
| O = NS->getParent(); |
| } while (O); |
| |
| return false; |
| } |
| |
| void DeclContext::makeDeclVisibleInContext(NamedDecl *D) { |
| DeclContext *PrimaryDC = this->getPrimaryContext(); |
| DeclContext *DeclDC = D->getDeclContext()->getPrimaryContext(); |
| // If the decl is being added outside of its semantic decl context, we |
| // need to ensure that we eagerly build the lookup information for it. |
| PrimaryDC->makeDeclVisibleInContextWithFlags(D, false, PrimaryDC == DeclDC); |
| } |
| |
| void DeclContext::makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal, |
| bool Recoverable) { |
| assert(this == getPrimaryContext() && "expected a primary DC"); |
| |
| // Skip declarations within functions. |
| // FIXME: We shouldn't need to build lookup tables for function declarations |
| // ever, and we can't do so correctly because we can't model the nesting of |
| // scopes which occurs within functions. We use "qualified" lookup into |
| // function declarations when handling friend declarations inside nested |
| // classes, and consequently accept the following invalid code: |
| // |
| // void f() { void g(); { int g; struct S { friend void g(); }; } } |
| if (isFunctionOrMethod() && !isa<FunctionDecl>(D)) |
| return; |
| |
| // Skip declarations which should be invisible to name lookup. |
| if (shouldBeHidden(D)) |
| return; |
| |
| // If we already have a lookup data structure, perform the insertion into |
| // it. If we might have externally-stored decls with this name, look them |
| // up and perform the insertion. If this decl was declared outside its |
| // semantic context, buildLookup won't add it, so add it now. |
| // |
| // FIXME: As a performance hack, don't add such decls into the translation |
| // unit unless we're in C++, since qualified lookup into the TU is never |
| // performed. |
| if (LookupPtr.getPointer() || hasExternalVisibleStorage() || |
| ((!Recoverable || D->getDeclContext() != D->getLexicalDeclContext()) && |
| (getParentASTContext().getLangOpts().CPlusPlus || |
| !isTranslationUnit()))) { |
| // If we have lazily omitted any decls, they might have the same name as |
| // the decl which we are adding, so build a full lookup table before adding |
| // this decl. |
| buildLookup(); |
| makeDeclVisibleInContextImpl(D, Internal); |
| } else { |
| LookupPtr.setInt(true); |
| } |
| |
| // If we are a transparent context or inline namespace, insert into our |
| // parent context, too. This operation is recursive. |
| if (isTransparentContext() || isInlineNamespace()) |
| getParent()->getPrimaryContext()-> |
| makeDeclVisibleInContextWithFlags(D, Internal, Recoverable); |
| |
| Decl *DCAsDecl = cast<Decl>(this); |
| // Notify that a decl was made visible unless we are a Tag being defined. |
| if (!(isa<TagDecl>(DCAsDecl) && cast<TagDecl>(DCAsDecl)->isBeingDefined())) |
| if (ASTMutationListener *L = DCAsDecl->getASTMutationListener()) |
| L->AddedVisibleDecl(this, D); |
| } |
| |
| void DeclContext::makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal) { |
| // Find or create the stored declaration map. |
| StoredDeclsMap *Map = LookupPtr.getPointer(); |
| if (!Map) { |
| ASTContext *C = &getParentASTContext(); |
| Map = CreateStoredDeclsMap(*C); |
| } |
| |
| // If there is an external AST source, load any declarations it knows about |
| // with this declaration's name. |
| // If the lookup table contains an entry about this name it means that we |
| // have already checked the external source. |
| if (!Internal) |
| if (ExternalASTSource *Source = getParentASTContext().getExternalSource()) |
| if (hasExternalVisibleStorage() && |
| Map->find(D->getDeclName()) == Map->end()) |
| Source->FindExternalVisibleDeclsByName(this, D->getDeclName()); |
| |
| // Insert this declaration into the map. |
| StoredDeclsList &DeclNameEntries = (*Map)[D->getDeclName()]; |
| if (DeclNameEntries.isNull()) { |
| DeclNameEntries.setOnlyValue(D); |
| return; |
| } |
| |
| if (DeclNameEntries.HandleRedeclaration(D)) { |
| // This declaration has replaced an existing one for which |
| // declarationReplaces returns true. |
| return; |
| } |
| |
| // Put this declaration into the appropriate slot. |
| DeclNameEntries.AddSubsequentDecl(D); |
| } |
| |
| /// Returns iterator range [First, Last) of UsingDirectiveDecls stored within |
| /// this context. |
| DeclContext::udir_iterator_range |
| DeclContext::getUsingDirectives() const { |
| // FIXME: Use something more efficient than normal lookup for using |
| // directives. In C++, using directives are looked up more than anything else. |
| lookup_const_result Result = lookup(UsingDirectiveDecl::getName()); |
| return udir_iterator_range(reinterpret_cast<udir_iterator>(Result.first), |
| reinterpret_cast<udir_iterator>(Result.second)); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Creation and Destruction of StoredDeclsMaps. // |
| //===----------------------------------------------------------------------===// |
| |
| StoredDeclsMap *DeclContext::CreateStoredDeclsMap(ASTContext &C) const { |
| assert(!LookupPtr.getPointer() && "context already has a decls map"); |
| assert(getPrimaryContext() == this && |
| "creating decls map on non-primary context"); |
| |
| StoredDeclsMap *M; |
| bool Dependent = isDependentContext(); |
| if (Dependent) |
| M = new DependentStoredDeclsMap(); |
| else |
| M = new StoredDeclsMap(); |
| M->Previous = C.LastSDM; |
| C.LastSDM = llvm::PointerIntPair<StoredDeclsMap*,1>(M, Dependent); |
| LookupPtr.setPointer(M); |
| return M; |
| } |
| |
| void ASTContext::ReleaseDeclContextMaps() { |
| // It's okay to delete DependentStoredDeclsMaps via a StoredDeclsMap |
| // pointer because the subclass doesn't add anything that needs to |
| // be deleted. |
| StoredDeclsMap::DestroyAll(LastSDM.getPointer(), LastSDM.getInt()); |
| } |
| |
| void StoredDeclsMap::DestroyAll(StoredDeclsMap *Map, bool Dependent) { |
| while (Map) { |
| // Advance the iteration before we invalidate memory. |
| llvm::PointerIntPair<StoredDeclsMap*,1> Next = Map->Previous; |
| |
| if (Dependent) |
| delete static_cast<DependentStoredDeclsMap*>(Map); |
| else |
| delete Map; |
| |
| Map = Next.getPointer(); |
| Dependent = Next.getInt(); |
| } |
| } |
| |
| DependentDiagnostic *DependentDiagnostic::Create(ASTContext &C, |
| DeclContext *Parent, |
| const PartialDiagnostic &PDiag) { |
| assert(Parent->isDependentContext() |
| && "cannot iterate dependent diagnostics of non-dependent context"); |
| Parent = Parent->getPrimaryContext(); |
| if (!Parent->LookupPtr.getPointer()) |
| Parent->CreateStoredDeclsMap(C); |
| |
| DependentStoredDeclsMap *Map |
| = static_cast<DependentStoredDeclsMap*>(Parent->LookupPtr.getPointer()); |
| |
| // Allocate the copy of the PartialDiagnostic via the ASTContext's |
| // BumpPtrAllocator, rather than the ASTContext itself. |
| PartialDiagnostic::Storage *DiagStorage = 0; |
| if (PDiag.hasStorage()) |
| DiagStorage = new (C) PartialDiagnostic::Storage; |
| |
| DependentDiagnostic *DD = new (C) DependentDiagnostic(PDiag, DiagStorage); |
| |
| // TODO: Maybe we shouldn't reverse the order during insertion. |
| DD->NextDiagnostic = Map->FirstDiagnostic; |
| Map->FirstDiagnostic = DD; |
| |
| return DD; |
| } |