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-rw-r--r--lib/AST/DeclBase.cpp756
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diff --git a/lib/AST/DeclBase.cpp b/lib/AST/DeclBase.cpp
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+//===--- 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/DeclObjC.h"
+#include "clang/AST/DeclTemplate.h"
+#include "clang/AST/ExternalASTSource.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Type.h"
+#include "clang/AST/Stmt.h"
+#include "clang/AST/StmtCXX.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/Support/raw_ostream.h"
+#include <algorithm>
+#include <cstdio>
+#include <vector>
+using namespace clang;
+
+//===----------------------------------------------------------------------===//
+// Statistics
+//===----------------------------------------------------------------------===//
+
+#define DECL(Derived, Base) static int n##Derived##s = 0;
+#include "clang/AST/DeclNodes.def"
+
+static bool StatSwitch = false;
+
+// This keeps track of all decl attributes. Since so few decls have attrs, we
+// keep them in a hash map instead of wasting space in the Decl class.
+typedef llvm::DenseMap<const Decl*, Attr*> DeclAttrMapTy;
+
+static DeclAttrMapTy *DeclAttrs = 0;
+
+const char *Decl::getDeclKindName() const {
+ switch (DeclKind) {
+ default: assert(0 && "Declaration not in DeclNodes.def!");
+#define DECL(Derived, Base) case Derived: return #Derived;
+#include "clang/AST/DeclNodes.def"
+ }
+}
+
+const char *DeclContext::getDeclKindName() const {
+ switch (DeclKind) {
+ default: assert(0 && "Declaration context not in DeclNodes.def!");
+#define DECL(Derived, Base) case Decl::Derived: return #Derived;
+#include "clang/AST/DeclNodes.def"
+ }
+}
+
+bool Decl::CollectingStats(bool Enable) {
+ if (Enable)
+ StatSwitch = true;
+ return StatSwitch;
+}
+
+void Decl::PrintStats() {
+ fprintf(stderr, "*** Decl Stats:\n");
+
+ int totalDecls = 0;
+#define DECL(Derived, Base) totalDecls += n##Derived##s;
+#include "clang/AST/DeclNodes.def"
+ fprintf(stderr, " %d decls total.\n", totalDecls);
+
+ int totalBytes = 0;
+#define DECL(Derived, Base) \
+ if (n##Derived##s > 0) { \
+ totalBytes += (int)(n##Derived##s * sizeof(Derived##Decl)); \
+ fprintf(stderr, " %d " #Derived " decls, %d each (%d bytes)\n", \
+ n##Derived##s, (int)sizeof(Derived##Decl), \
+ (int)(n##Derived##s * sizeof(Derived##Decl))); \
+ }
+#include "clang/AST/DeclNodes.def"
+
+ fprintf(stderr, "Total bytes = %d\n", totalBytes);
+}
+
+void Decl::addDeclKind(Kind k) {
+ switch (k) {
+ default: assert(0 && "Declaration not in DeclNodes.def!");
+#define DECL(Derived, Base) case Derived: ++n##Derived##s; break;
+#include "clang/AST/DeclNodes.def"
+ }
+}
+
+//===----------------------------------------------------------------------===//
+// PrettyStackTraceDecl Implementation
+//===----------------------------------------------------------------------===//
+
+void PrettyStackTraceDecl::print(llvm::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 (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() {
+ if (isOutOfSemaDC())
+ delete getMultipleDC();
+
+ assert(!HasAttrs && "attributes should have been freed by Destroy");
+}
+
+void Decl::setDeclContext(DeclContext *DC) {
+ if (isOutOfSemaDC())
+ delete getMultipleDC();
+
+ DeclCtx = DC;
+}
+
+void Decl::setLexicalDeclContext(DeclContext *DC) {
+ if (DC == getLexicalDeclContext())
+ return;
+
+ if (isInSemaDC()) {
+ MultipleDC *MDC = new MultipleDC();
+ MDC->SemanticDC = getDeclContext();
+ MDC->LexicalDC = DC;
+ DeclCtx = MDC;
+ } else {
+ getMultipleDC()->LexicalDC = DC;
+ }
+}
+
+unsigned Decl::getIdentifierNamespaceForKind(Kind DeclKind) {
+ switch (DeclKind) {
+ default:
+ if (DeclKind >= FunctionFirst && DeclKind <= FunctionLast)
+ return IDNS_Ordinary;
+ assert(0 && "Unknown decl kind!");
+ case OverloadedFunction:
+ case Typedef:
+ case EnumConstant:
+ case Var:
+ case ImplicitParam:
+ case ParmVar:
+ case OriginalParmVar:
+ case NonTypeTemplateParm:
+ case ObjCMethod:
+ case ObjCContainer:
+ case ObjCCategory:
+ case ObjCInterface:
+ case ObjCProperty:
+ case ObjCCompatibleAlias:
+ return IDNS_Ordinary;
+
+ case ObjCProtocol:
+ return IDNS_ObjCProtocol;
+
+ case ObjCImplementation:
+ return IDNS_ObjCImplementation;
+
+ case ObjCCategoryImpl:
+ return IDNS_ObjCCategoryImpl;
+
+ case Field:
+ case ObjCAtDefsField:
+ case ObjCIvar:
+ return IDNS_Member;
+
+ case Record:
+ case CXXRecord:
+ case Enum:
+ case TemplateTypeParm:
+ return IDNS_Tag;
+
+ case Namespace:
+ case Template:
+ case FunctionTemplate:
+ case ClassTemplate:
+ case TemplateTemplateParm:
+ case NamespaceAlias:
+ return IDNS_Tag | IDNS_Ordinary;
+
+ // Never have names.
+ case LinkageSpec:
+ case FileScopeAsm:
+ case StaticAssert:
+ case ObjCClass:
+ case ObjCPropertyImpl:
+ case ObjCForwardProtocol:
+ case Block:
+ case TranslationUnit:
+
+ // Aren't looked up?
+ case UsingDirective:
+ case ClassTemplateSpecialization:
+ case ClassTemplatePartialSpecialization:
+ return 0;
+ }
+}
+
+void Decl::addAttr(Attr *NewAttr) {
+ if (!DeclAttrs)
+ DeclAttrs = new DeclAttrMapTy();
+
+ Attr *&ExistingAttr = (*DeclAttrs)[this];
+
+ NewAttr->setNext(ExistingAttr);
+ ExistingAttr = NewAttr;
+
+ HasAttrs = true;
+}
+
+void Decl::invalidateAttrs() {
+ if (!HasAttrs) return;
+
+ HasAttrs = false;
+ (*DeclAttrs)[this] = 0;
+ DeclAttrs->erase(this);
+
+ if (DeclAttrs->empty()) {
+ delete DeclAttrs;
+ DeclAttrs = 0;
+ }
+}
+
+const Attr *Decl::getAttrsImpl() const {
+ assert(HasAttrs && "getAttrs() should verify this!");
+ return (*DeclAttrs)[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);
+
+ // Handle the case when both decls have attrs.
+ if (HasRHSAttr) {
+ std::swap((*DeclAttrs)[this], (*DeclAttrs)[RHS]);
+ return;
+ }
+
+ // Otherwise, LHS has an attr and RHS doesn't.
+ (*DeclAttrs)[RHS] = (*DeclAttrs)[this];
+ (*DeclAttrs).erase(this);
+ this->HasAttrs = false;
+ RHS->HasAttrs = true;
+}
+
+
+void Decl::Destroy(ASTContext &C) {
+ // Free attributes for this decl.
+ if (HasAttrs) {
+ DeclAttrMapTy::iterator it = DeclAttrs->find(this);
+ assert(it != DeclAttrs->end() && "No attrs found but HasAttrs is true!");
+
+ // release attributes.
+ it->second->Destroy(C);
+ invalidateAttrs();
+ HasAttrs = false;
+ }
+
+#if 0
+ // FIXME: Once ownership is fully understood, we can enable this code
+ if (DeclContext *DC = dyn_cast<DeclContext>(this))
+ DC->decls_begin()->Destroy(C);
+
+ // Observe the unrolled recursion. By setting N->NextDeclInContext = 0x0
+ // within the loop, only the Destroy method for the first Decl
+ // will deallocate all of the Decls in a chain.
+
+ Decl* N = getNextDeclInContext();
+
+ while (N) {
+ Decl* Tmp = N->getNextDeclInContext();
+ N->NextDeclInContext = 0;
+ N->Destroy(C);
+ N = Tmp;
+ }
+
+ this->~Decl();
+ C.Deallocate((void *)this);
+#endif
+}
+
+Decl *Decl::castFromDeclContext (const DeclContext *D) {
+ Decl::Kind DK = D->getDeclKind();
+ switch(DK) {
+#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.def"
+ default:
+#define DECL_CONTEXT_BASE(Name) \
+ if (DK >= Decl::Name##First && DK <= Decl::Name##Last) \
+ return static_cast<Name##Decl*>(const_cast<DeclContext*>(D));
+#include "clang/AST/DeclNodes.def"
+ assert(false && "a decl that inherits DeclContext isn't handled");
+ return 0;
+ }
+}
+
+DeclContext *Decl::castToDeclContext(const Decl *D) {
+ Decl::Kind DK = D->getKind();
+ switch(DK) {
+#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.def"
+ default:
+#define DECL_CONTEXT_BASE(Name) \
+ if (DK >= Decl::Name##First && DK <= Decl::Name##Last) \
+ return static_cast<Name##Decl*>(const_cast<Decl*>(D));
+#include "clang/AST/DeclNodes.def"
+ assert(false && "a decl that inherits DeclContext isn't handled");
+ return 0;
+ }
+}
+
+CompoundStmt* Decl::getCompoundBody(ASTContext &Context) const {
+ return dyn_cast_or_null<CompoundStmt>(getBody(Context));
+}
+
+SourceLocation Decl::getBodyRBrace(ASTContext &Context) const {
+ Stmt *Body = getBody(Context);
+ if (!Body)
+ return SourceLocation();
+ if (CompoundStmt *CS = dyn_cast<CompoundStmt>(Body))
+ return CS->getRBracLoc();
+ assert(isa<CXXTryStmt>(Body) &&
+ "Body can only be CompoundStmt or CXXTryStmt");
+ return cast<CXXTryStmt>(Body)->getSourceRange().getEnd();
+}
+
+#ifndef NDEBUG
+void Decl::CheckAccessDeclContext() const {
+ assert((Access != AS_none || isa<TranslationUnitDecl>(this) ||
+ !isa<CXXRecordDecl>(getDeclContext())) &&
+ "Access specifier is AS_none inside a record decl");
+}
+
+#endif
+
+//===----------------------------------------------------------------------===//
+// DeclContext Implementation
+//===----------------------------------------------------------------------===//
+
+bool DeclContext::classof(const Decl *D) {
+ switch (D->getKind()) {
+#define DECL_CONTEXT(Name) case Decl::Name:
+#define DECL_CONTEXT_BASE(Name)
+#include "clang/AST/DeclNodes.def"
+ return true;
+ default:
+#define DECL_CONTEXT_BASE(Name) \
+ if (D->getKind() >= Decl::Name##First && \
+ D->getKind() <= Decl::Name##Last) \
+ return true;
+#include "clang/AST/DeclNodes.def"
+ return false;
+ }
+}
+
+DeclContext::~DeclContext() {
+ delete static_cast<StoredDeclsMap*>(LookupPtr);
+}
+
+void DeclContext::DestroyDecls(ASTContext &C) {
+ for (decl_iterator D = decls_begin(C); D != decls_end(C); )
+ (*D++)->Destroy(C);
+}
+
+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 (const FunctionDecl *Function = dyn_cast<FunctionDecl>(this))
+ if (Function->getDescribedFunctionTemplate())
+ return true;
+
+ return getParent() && getParent()->isDependentContext();
+}
+
+bool DeclContext::isTransparentContext() const {
+ if (DeclKind == Decl::Enum)
+ return true; // FIXME: Check for C++0x scoped enums
+ else if (DeclKind == Decl::LinkageSpec)
+ return true;
+ else if (DeclKind >= Decl::RecordFirst && DeclKind <= Decl::RecordLast)
+ return cast<RecordDecl>(this)->isAnonymousStructOrUnion();
+ else if (DeclKind == Decl::Namespace)
+ return false; // FIXME: Check for C++0x inline namespaces
+
+ 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:
+ case Decl::ObjCProtocol:
+ case Decl::ObjCCategory:
+ // FIXME: Can Objective-C interfaces be forward-declared?
+ return this;
+
+ case Decl::ObjCImplementation:
+ case Decl::ObjCCategoryImpl:
+ return this;
+
+ default:
+ if (DeclKind >= Decl::TagFirst && DeclKind <= Decl::TagLast) {
+ // If this is a tag type that has a definition or is currently
+ // being defined, that definition is our primary context.
+ if (const TagType *TagT =cast<TagDecl>(this)->TypeForDecl->getAsTagType())
+ if (TagT->isBeingDefined() ||
+ (TagT->getDecl() && TagT->getDecl()->isDefinition()))
+ return TagT->getDecl();
+ return this;
+ }
+
+ assert(DeclKind >= Decl::FunctionFirst && DeclKind <= Decl::FunctionLast &&
+ "Unknown DeclContext kind");
+ return this;
+ }
+}
+
+DeclContext *DeclContext::getNextContext() {
+ switch (DeclKind) {
+ case Decl::Namespace:
+ // Return the next namespace
+ return static_cast<NamespaceDecl*>(this)->getNextNamespace();
+
+ default:
+ return 0;
+ }
+}
+
+/// \brief Load the declarations within this lexical storage from an
+/// external source.
+void
+DeclContext::LoadLexicalDeclsFromExternalStorage(ASTContext &Context) const {
+ ExternalASTSource *Source = Context.getExternalSource();
+ assert(hasExternalLexicalStorage() && Source && "No external storage?");
+
+ llvm::SmallVector<uint32_t, 64> Decls;
+ if (Source->ReadDeclsLexicallyInContext(const_cast<DeclContext *>(this),
+ Decls))
+ return;
+
+ // There is no longer any lexical storage in this context
+ ExternalLexicalStorage = false;
+
+ if (Decls.empty())
+ return;
+
+ // Resolve all of the declaration IDs into declarations, building up
+ // a chain of declarations via the Decl::NextDeclInContext field.
+ Decl *FirstNewDecl = 0;
+ Decl *PrevDecl = 0;
+ for (unsigned I = 0, N = Decls.size(); I != N; ++I) {
+ Decl *D = Source->GetDecl(Decls[I]);
+ if (PrevDecl)
+ PrevDecl->NextDeclInContext = D;
+ else
+ FirstNewDecl = D;
+
+ PrevDecl = D;
+ }
+
+ // Splice the newly-read declarations into the beginning of the list
+ // of declarations.
+ PrevDecl->NextDeclInContext = FirstDecl;
+ FirstDecl = FirstNewDecl;
+ if (!LastDecl)
+ LastDecl = PrevDecl;
+}
+
+void
+DeclContext::LoadVisibleDeclsFromExternalStorage(ASTContext &Context) const {
+ DeclContext *This = const_cast<DeclContext *>(this);
+ ExternalASTSource *Source = Context.getExternalSource();
+ assert(hasExternalVisibleStorage() && Source && "No external storage?");
+
+ llvm::SmallVector<VisibleDeclaration, 64> Decls;
+ if (Source->ReadDeclsVisibleInContext(This, Decls))
+ return;
+
+ // There is no longer any visible storage in this context
+ ExternalVisibleStorage = false;
+
+ // Load the declaration IDs for all of the names visible in this
+ // context.
+ assert(!LookupPtr && "Have a lookup map before de-serialization?");
+ StoredDeclsMap *Map = new StoredDeclsMap;
+ LookupPtr = Map;
+ for (unsigned I = 0, N = Decls.size(); I != N; ++I) {
+ (*Map)[Decls[I].Name].setFromDeclIDs(Decls[I].Declarations);
+ }
+}
+
+DeclContext::decl_iterator DeclContext::decls_begin(ASTContext &Context) const {
+ if (hasExternalLexicalStorage())
+ LoadLexicalDeclsFromExternalStorage(Context);
+
+ // FIXME: Check whether we need to load some declarations from
+ // external storage.
+ return decl_iterator(FirstDecl);
+}
+
+DeclContext::decl_iterator DeclContext::decls_end(ASTContext &Context) const {
+ if (hasExternalLexicalStorage())
+ LoadLexicalDeclsFromExternalStorage(Context);
+
+ return decl_iterator();
+}
+
+bool DeclContext::decls_empty(ASTContext &Context) const {
+ if (hasExternalLexicalStorage())
+ LoadLexicalDeclsFromExternalStorage(Context);
+
+ return !FirstDecl;
+}
+
+void DeclContext::addDecl(ASTContext &Context, 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->NextDeclInContext = D;
+ LastDecl = D;
+ } else {
+ FirstDecl = LastDecl = D;
+ }
+
+ if (NamedDecl *ND = dyn_cast<NamedDecl>(D))
+ ND->getDeclContext()->makeDeclVisibleInContext(Context, ND);
+}
+
+/// buildLookup - Build the lookup data structure with all of the
+/// declarations in DCtx (and any other contexts linked to it or
+/// transparent contexts nested within it).
+void DeclContext::buildLookup(ASTContext &Context, DeclContext *DCtx) {
+ for (; DCtx; DCtx = DCtx->getNextContext()) {
+ for (decl_iterator D = DCtx->decls_begin(Context),
+ DEnd = DCtx->decls_end(Context);
+ D != DEnd; ++D) {
+ // Insert this declaration into the lookup structure
+ if (NamedDecl *ND = dyn_cast<NamedDecl>(*D))
+ makeDeclVisibleInContextImpl(Context, ND);
+
+ // If this declaration is itself a transparent declaration context,
+ // add its members (recursively).
+ if (DeclContext *InnerCtx = dyn_cast<DeclContext>(*D))
+ if (InnerCtx->isTransparentContext())
+ buildLookup(Context, InnerCtx->getPrimaryContext());
+ }
+ }
+}
+
+DeclContext::lookup_result
+DeclContext::lookup(ASTContext &Context, DeclarationName Name) {
+ DeclContext *PrimaryContext = getPrimaryContext();
+ if (PrimaryContext != this)
+ return PrimaryContext->lookup(Context, Name);
+
+ if (hasExternalVisibleStorage())
+ LoadVisibleDeclsFromExternalStorage(Context);
+
+ /// If there is no lookup data structure, build one now by walking
+ /// all of the linked DeclContexts (in declaration order!) and
+ /// inserting their values.
+ if (!LookupPtr) {
+ buildLookup(Context, this);
+
+ if (!LookupPtr)
+ return lookup_result(0, 0);
+ }
+
+ StoredDeclsMap *Map = static_cast<StoredDeclsMap*>(LookupPtr);
+ StoredDeclsMap::iterator Pos = Map->find(Name);
+ if (Pos == Map->end())
+ return lookup_result(0, 0);
+ return Pos->second.getLookupResult(Context);
+}
+
+DeclContext::lookup_const_result
+DeclContext::lookup(ASTContext &Context, DeclarationName Name) const {
+ return const_cast<DeclContext*>(this)->lookup(Context, Name);
+}
+
+DeclContext *DeclContext::getLookupContext() {
+ 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->isTransparentContext())
+ Ctx = Ctx->getParent();
+ return Ctx->getPrimaryContext();
+}
+
+void DeclContext::makeDeclVisibleInContext(ASTContext &Context, NamedDecl *D) {
+ // 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;
+
+ DeclContext *PrimaryContext = getPrimaryContext();
+ if (PrimaryContext != this) {
+ PrimaryContext->makeDeclVisibleInContext(Context, D);
+ return;
+ }
+
+ // If we already have a lookup data structure, perform the insertion
+ // into it. Otherwise, be lazy and don't build that structure until
+ // someone asks for it.
+ if (LookupPtr)
+ makeDeclVisibleInContextImpl(Context, D);
+
+ // If we are a transparent context, insert into our parent context,
+ // too. This operation is recursive.
+ if (isTransparentContext())
+ getParent()->makeDeclVisibleInContext(Context, D);
+}
+
+void DeclContext::makeDeclVisibleInContextImpl(ASTContext &Context,
+ NamedDecl *D) {
+ // Skip unnamed declarations.
+ if (!D->getDeclName())
+ return;
+
+ // 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;
+
+ if (!LookupPtr)
+ LookupPtr = new StoredDeclsMap;
+
+ // Insert this declaration into the map.
+ StoredDeclsMap &Map = *static_cast<StoredDeclsMap*>(LookupPtr);
+ StoredDeclsList &DeclNameEntries = Map[D->getDeclName()];
+ if (DeclNameEntries.isNull()) {
+ DeclNameEntries.setOnlyValue(D);
+ return;
+ }
+
+ // If it is possible that this is a redeclaration, check to see if there is
+ // already a decl for which declarationReplaces returns true. If there is
+ // one, just replace it and return.
+ if (DeclNameEntries.HandleRedeclaration(Context, D))
+ 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(ASTContext &Context) const {
+ lookup_const_result Result = lookup(Context, UsingDirectiveDecl::getName());
+ return udir_iterator_range(reinterpret_cast<udir_iterator>(Result.first),
+ reinterpret_cast<udir_iterator>(Result.second));
+}
+
+void StoredDeclsList::materializeDecls(ASTContext &Context) {
+ if (isNull())
+ return;
+
+ switch ((DataKind)(Data & 0x03)) {
+ case DK_Decl:
+ case DK_Decl_Vector:
+ break;
+
+ case DK_DeclID: {
+ // Resolve this declaration ID to an actual declaration by
+ // querying the external AST source.
+ unsigned DeclID = Data >> 2;
+
+ ExternalASTSource *Source = Context.getExternalSource();
+ assert(Source && "No external AST source available!");
+
+ Data = reinterpret_cast<uintptr_t>(Source->GetDecl(DeclID));
+ break;
+ }
+
+ case DK_ID_Vector: {
+ // We have a vector of declaration IDs. Resolve all of them to
+ // actual declarations.
+ VectorTy &Vector = *getAsVector();
+ ExternalASTSource *Source = Context.getExternalSource();
+ assert(Source && "No external AST source available!");
+
+ for (unsigned I = 0, N = Vector.size(); I != N; ++I)
+ Vector[I] = reinterpret_cast<uintptr_t>(Source->GetDecl(Vector[I]));
+
+ Data = (Data & ~0x03) | DK_Decl_Vector;
+ break;
+ }
+ }
+}
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