| //===- DeclBase.cpp - Declaration AST Node Implementation -----------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the Decl and DeclContext classes. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/AST/DeclBase.h" |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/ASTLambda.h" |
| #include "clang/AST/ASTMutationListener.h" |
| #include "clang/AST/Attr.h" |
| #include "clang/AST/AttrIterator.h" |
| #include "clang/AST/Decl.h" |
| #include "clang/AST/DeclCXX.h" |
| #include "clang/AST/DeclContextInternals.h" |
| #include "clang/AST/DeclFriend.h" |
| #include "clang/AST/DeclObjC.h" |
| #include "clang/AST/DeclOpenMP.h" |
| #include "clang/AST/DeclTemplate.h" |
| #include "clang/AST/DependentDiagnostic.h" |
| #include "clang/AST/ExternalASTSource.h" |
| #include "clang/AST/Stmt.h" |
| #include "clang/AST/Type.h" |
| #include "clang/Basic/IdentifierTable.h" |
| #include "clang/Basic/LLVM.h" |
| #include "clang/Basic/LangOptions.h" |
| #include "clang/Basic/ObjCRuntime.h" |
| #include "clang/Basic/PartialDiagnostic.h" |
| #include "clang/Basic/SourceLocation.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "llvm/ADT/ArrayRef.h" |
| #include "llvm/ADT/PointerIntPair.h" |
| #include "llvm/ADT/SmallVector.h" |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/Support/Casting.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/MathExtras.h" |
| #include "llvm/Support/VersionTuple.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include <algorithm> |
| #include <cassert> |
| #include <cstddef> |
| #include <string> |
| #include <tuple> |
| #include <utility> |
| |
| 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::updateOutOfDate(IdentifierInfo &II) const { |
| getASTContext().getExternalSource()->updateOutOfDateIdentifier(II); |
| } |
| |
| #define DECL(DERIVED, BASE) \ |
| static_assert(alignof(Decl) >= alignof(DERIVED##Decl), \ |
| "Alignment sufficient after objects prepended to " #DERIVED); |
| #define ABSTRACT_DECL(DECL) |
| #include "clang/AST/DeclNodes.inc" |
| |
| void *Decl::operator new(std::size_t Size, const ASTContext &Context, |
| unsigned ID, std::size_t Extra) { |
| // Allocate an extra 8 bytes worth of storage, which ensures that the |
| // resulting pointer will still be 8-byte aligned. |
| static_assert(sizeof(unsigned) * 2 >= alignof(Decl), |
| "Decl won't be misaligned"); |
| void *Start = Context.Allocate(Size + Extra + 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; |
| } |
| |
| void *Decl::operator new(std::size_t Size, const ASTContext &Ctx, |
| DeclContext *Parent, std::size_t Extra) { |
| assert(!Parent || &Parent->getParentASTContext() == &Ctx); |
| // With local visibility enabled, we track the owning module even for local |
| // declarations. We create the TU decl early and may not yet know what the |
| // LangOpts are, so conservatively allocate the storage. |
| if (Ctx.getLangOpts().trackLocalOwningModule() || !Parent) { |
| // Ensure required alignment of the resulting object by adding extra |
| // padding at the start if required. |
| size_t ExtraAlign = |
| llvm::offsetToAlignment(sizeof(Module *), llvm::Align(alignof(Decl))); |
| auto *Buffer = reinterpret_cast<char *>( |
| ::operator new(ExtraAlign + sizeof(Module *) + Size + Extra, Ctx)); |
| Buffer += ExtraAlign; |
| auto *ParentModule = |
| Parent ? cast<Decl>(Parent)->getOwningModule() : nullptr; |
| return new (Buffer) Module*(ParentModule) + 1; |
| } |
| return ::operator new(Size + Extra, Ctx); |
| } |
| |
| Module *Decl::getOwningModuleSlow() const { |
| assert(isFromASTFile() && "Not from AST file?"); |
| return getASTContext().getExternalSource()->getModule(getOwningModuleID()); |
| } |
| |
| bool Decl::hasLocalOwningModuleStorage() const { |
| return getASTContext().getLangOpts().trackLocalOwningModule(); |
| } |
| |
| 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; |
| assert(!isa<TagDecl>(this) || !cast<TagDecl>(this)->isCompleteDefinition()); |
| if (!Invalid) { |
| return; |
| } |
| |
| if (!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); |
| } |
| |
| // Marking a DecompositionDecl as invalid implies all the child BindingDecl's |
| // are invalid too. |
| if (auto *DD = dyn_cast<DecompositionDecl>(this)) { |
| for (auto *Binding : DD->bindings()) { |
| Binding->setInvalidDecl(); |
| } |
| } |
| } |
| |
| const char *DeclContext::getDeclKindName() const { |
| switch (getDeclKind()) { |
| #define DECL(DERIVED, BASE) case Decl::DERIVED: return #DERIVED; |
| #define ABSTRACT_DECL(DECL) |
| #include "clang/AST/DeclNodes.inc" |
| } |
| llvm_unreachable("Declaration context not in 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 auto *TTP = dyn_cast<TemplateTypeParmDecl>(this)) |
| return TTP->isParameterPack(); |
| if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(this)) |
| return NTTP->isParameterPack(); |
| if (const auto *TTP = dyn_cast<TemplateTemplateParmDecl>(this)) |
| return TTP->isParameterPack(); |
| return false; |
| } |
| |
| bool Decl::isParameterPack() const { |
| if (const auto *Var = dyn_cast<VarDecl>(this)) |
| return Var->isParameterPack(); |
| |
| return isTemplateParameterPack(); |
| } |
| |
| FunctionDecl *Decl::getAsFunction() { |
| if (auto *FD = dyn_cast<FunctionDecl>(this)) |
| return FD; |
| if (const auto *FTD = dyn_cast<FunctionTemplateDecl>(this)) |
| return FTD->getTemplatedDecl(); |
| return nullptr; |
| } |
| |
| bool Decl::isTemplateDecl() const { |
| return isa<TemplateDecl>(this); |
| } |
| |
| TemplateDecl *Decl::getDescribedTemplate() const { |
| if (auto *FD = dyn_cast<FunctionDecl>(this)) |
| return FD->getDescribedFunctionTemplate(); |
| if (auto *RD = dyn_cast<CXXRecordDecl>(this)) |
| return RD->getDescribedClassTemplate(); |
| if (auto *VD = dyn_cast<VarDecl>(this)) |
| return VD->getDescribedVarTemplate(); |
| if (auto *AD = dyn_cast<TypeAliasDecl>(this)) |
| return AD->getDescribedAliasTemplate(); |
| |
| return nullptr; |
| } |
| |
| const TemplateParameterList *Decl::getDescribedTemplateParams() const { |
| if (auto *TD = getDescribedTemplate()) |
| return TD->getTemplateParameters(); |
| if (auto *CTPSD = dyn_cast<ClassTemplatePartialSpecializationDecl>(this)) |
| return CTPSD->getTemplateParameters(); |
| if (auto *VTPSD = dyn_cast<VarTemplatePartialSpecializationDecl>(this)) |
| return VTPSD->getTemplateParameters(); |
| return nullptr; |
| } |
| |
| bool Decl::isTemplated() const { |
| // A declaration is templated if it is a template or a template pattern, or |
| // is within (lexcially for a friend, semantically otherwise) a dependent |
| // context. |
| // FIXME: Should local extern declarations be treated like friends? |
| if (auto *AsDC = dyn_cast<DeclContext>(this)) |
| return AsDC->isDependentContext(); |
| auto *DC = getFriendObjectKind() ? getLexicalDeclContext() : getDeclContext(); |
| return DC->isDependentContext() || isTemplateDecl() || |
| getDescribedTemplateParams(); |
| } |
| |
| unsigned Decl::getTemplateDepth() const { |
| if (auto *DC = dyn_cast<DeclContext>(this)) |
| if (DC->isFileContext()) |
| return 0; |
| |
| if (auto *TPL = getDescribedTemplateParams()) |
| return TPL->getDepth() + 1; |
| |
| // If this is a dependent lambda, there might be an enclosing variable |
| // template. In this case, the next step is not the parent DeclContext (or |
| // even a DeclContext at all). |
| auto *RD = dyn_cast<CXXRecordDecl>(this); |
| if (RD && RD->isDependentLambda()) |
| if (Decl *Context = RD->getLambdaContextDecl()) |
| return Context->getTemplateDepth(); |
| |
| const DeclContext *DC = |
| getFriendObjectKind() ? getLexicalDeclContext() : getDeclContext(); |
| return cast<Decl>(DC)->getTemplateDepth(); |
| } |
| |
| const DeclContext *Decl::getParentFunctionOrMethod() const { |
| for (const DeclContext *DC = getDeclContext(); |
| DC && !DC->isTranslationUnit() && !DC->isNamespace(); |
| DC = DC->getParent()) |
| if (DC->isFunctionOrMethod()) |
| return DC; |
| |
| return nullptr; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // 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 auto *DN = dyn_cast_or_null<NamedDecl>(TheDecl)) { |
| OS << " '"; |
| DN->printQualifiedName(OS); |
| OS << '\''; |
| } |
| OS << '\n'; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Decl Implementation |
| //===----------------------------------------------------------------------===// |
| |
| // Out-of-line virtual method providing a home for Decl. |
| Decl::~Decl() = default; |
| |
| 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; |
| } |
| |
| // FIXME: We shouldn't be changing the lexical context of declarations |
| // imported from AST files. |
| if (!isFromASTFile()) { |
| setModuleOwnershipKind(getModuleOwnershipKindForChildOf(DC)); |
| if (hasOwningModule()) |
| setLocalOwningModule(cast<Decl>(DC)->getOwningModule()); |
| } |
| |
| assert( |
| (getModuleOwnershipKind() != ModuleOwnershipKind::VisibleWhenImported || |
| getOwningModule()) && |
| "hidden declaration has no owning module"); |
| } |
| |
| void Decl::setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC, |
| ASTContext &Ctx) { |
| if (SemaDC == LexicalDC) { |
| DeclCtx = SemaDC; |
| } else { |
| auto *MDC = new (Ctx) Decl::MultipleDC(); |
| MDC->SemanticDC = SemaDC; |
| MDC->LexicalDC = LexicalDC; |
| DeclCtx = MDC; |
| } |
| } |
| |
| bool Decl::isInLocalScopeForInstantiation() const { |
| const DeclContext *LDC = getLexicalDeclContext(); |
| if (!LDC->isDependentContext()) |
| return false; |
| while (true) { |
| if (LDC->isFunctionOrMethod()) |
| return true; |
| if (!isa<TagDecl>(LDC)) |
| return false; |
| if (const auto *CRD = dyn_cast<CXXRecordDecl>(LDC)) |
| if (CRD->isLambda()) |
| return true; |
| LDC = LDC->getLexicalParent(); |
| } |
| return false; |
| } |
| |
| bool Decl::isInAnonymousNamespace() const { |
| for (const DeclContext *DC = getDeclContext(); DC; DC = DC->getParent()) { |
| if (const auto *ND = dyn_cast<NamespaceDecl>(DC)) |
| if (ND->isAnonymousNamespace()) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| bool Decl::isInStdNamespace() const { |
| const DeclContext *DC = getDeclContext(); |
| return DC && DC->isStdNamespace(); |
| } |
| |
| TranslationUnitDecl *Decl::getTranslationUnitDecl() { |
| if (auto *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(); |
| } |
| |
| /// Helper to get the language options from the ASTContext. |
| /// Defined out of line to avoid depending on ASTContext.h. |
| const LangOptions &Decl::getLangOpts() const { |
| return getASTContext().getLangOpts(); |
| } |
| |
| 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) { |
| if (!I->isAlignmentErrorDependent()) |
| Align = std::max(Align, I->getAlignment(Ctx)); |
| } |
| return Align; |
| } |
| |
| bool Decl::isUsed(bool CheckUsedAttr) const { |
| const Decl *CanonD = getCanonicalDecl(); |
| if (CanonD->Used) |
| return true; |
| |
| // Check for used attribute. |
| // Ask the most recent decl, since attributes accumulate in the redecl chain. |
| if (CheckUsedAttr && getMostRecentDecl()->hasAttr<UsedAttr>()) |
| return true; |
| |
| // The information may have not been deserialized yet. Force deserialization |
| // to complete the needed information. |
| return getMostRecentDecl()->getCanonicalDecl()->Used; |
| } |
| |
| void Decl::markUsed(ASTContext &C) { |
| if (isUsed(false)) |
| return; |
| |
| if (C.getASTMutationListener()) |
| C.getASTMutationListener()->DeclarationMarkedUsed(this); |
| |
| setIsUsed(); |
| } |
| |
| bool Decl::isReferenced() const { |
| if (Referenced) |
| return true; |
| |
| // Check redeclarations. |
| for (const auto *I : redecls()) |
| if (I->Referenced) |
| return true; |
| |
| return false; |
| } |
| |
| ExternalSourceSymbolAttr *Decl::getExternalSourceSymbolAttr() const { |
| const Decl *Definition = nullptr; |
| if (auto *ID = dyn_cast<ObjCInterfaceDecl>(this)) { |
| Definition = ID->getDefinition(); |
| } else if (auto *PD = dyn_cast<ObjCProtocolDecl>(this)) { |
| Definition = PD->getDefinition(); |
| } else if (auto *TD = dyn_cast<TagDecl>(this)) { |
| Definition = TD->getDefinition(); |
| } |
| if (!Definition) |
| Definition = this; |
| |
| if (auto *attr = Definition->getAttr<ExternalSourceSymbolAttr>()) |
| return attr; |
| if (auto *dcd = dyn_cast<Decl>(getDeclContext())) { |
| return dcd->getAttr<ExternalSourceSymbolAttr>(); |
| } |
| |
| return nullptr; |
| } |
| |
| bool Decl::hasDefiningAttr() const { |
| return hasAttr<AliasAttr>() || hasAttr<IFuncAttr>() || |
| hasAttr<LoaderUninitializedAttr>(); |
| } |
| |
| const Attr *Decl::getDefiningAttr() const { |
| if (auto *AA = getAttr<AliasAttr>()) |
| return AA; |
| if (auto *IFA = getAttr<IFuncAttr>()) |
| return IFA; |
| if (auto *NZA = getAttr<LoaderUninitializedAttr>()) |
| return NZA; |
| return nullptr; |
| } |
| |
| static StringRef getRealizedPlatform(const AvailabilityAttr *A, |
| const ASTContext &Context) { |
| // Check if this is an App Extension "platform", and if so chop off |
| // the suffix for matching with the actual platform. |
| StringRef RealizedPlatform = A->getPlatform()->getName(); |
| if (!Context.getLangOpts().AppExt) |
| return RealizedPlatform; |
| size_t suffix = RealizedPlatform.rfind("_app_extension"); |
| if (suffix != StringRef::npos) |
| return RealizedPlatform.slice(0, suffix); |
| return RealizedPlatform; |
| } |
| |
| /// 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, |
| VersionTuple EnclosingVersion) { |
| if (EnclosingVersion.empty()) |
| EnclosingVersion = Context.getTargetInfo().getPlatformMinVersion(); |
| |
| if (EnclosingVersion.empty()) |
| return AR_Available; |
| |
| StringRef ActualPlatform = A->getPlatform()->getName(); |
| StringRef TargetPlatform = Context.getTargetInfo().getPlatformName(); |
| |
| // Match the platform name. |
| if (getRealizedPlatform(A, Context) != TargetPlatform) |
| return AR_Available; |
| |
| StringRef PrettyPlatformName |
| = AvailabilityAttr::getPrettyPlatformName(ActualPlatform); |
| |
| if (PrettyPlatformName.empty()) |
| PrettyPlatformName = ActualPlatform; |
| |
| 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() && |
| EnclosingVersion < A->getIntroduced()) { |
| if (Message) { |
| Message->clear(); |
| llvm::raw_string_ostream Out(*Message); |
| VersionTuple VTI(A->getIntroduced()); |
| Out << "introduced in " << PrettyPlatformName << ' ' |
| << VTI << HintMessage; |
| } |
| |
| return A->getStrict() ? AR_Unavailable : AR_NotYetIntroduced; |
| } |
| |
| // Make sure that this declaration hasn't been obsoleted. |
| if (!A->getObsoleted().empty() && EnclosingVersion >= A->getObsoleted()) { |
| if (Message) { |
| Message->clear(); |
| llvm::raw_string_ostream Out(*Message); |
| VersionTuple VTO(A->getObsoleted()); |
| Out << "obsoleted in " << PrettyPlatformName << ' ' |
| << VTO << HintMessage; |
| } |
| |
| return AR_Unavailable; |
| } |
| |
| // Make sure that this declaration hasn't been deprecated. |
| if (!A->getDeprecated().empty() && EnclosingVersion >= A->getDeprecated()) { |
| if (Message) { |
| Message->clear(); |
| llvm::raw_string_ostream Out(*Message); |
| VersionTuple VTD(A->getDeprecated()); |
| Out << "first deprecated in " << PrettyPlatformName << ' ' |
| << VTD << HintMessage; |
| } |
| |
| return AR_Deprecated; |
| } |
| |
| return AR_Available; |
| } |
| |
| AvailabilityResult Decl::getAvailability(std::string *Message, |
| VersionTuple EnclosingVersion, |
| StringRef *RealizedPlatform) const { |
| if (auto *FTD = dyn_cast<FunctionTemplateDecl>(this)) |
| return FTD->getTemplatedDecl()->getAvailability(Message, EnclosingVersion, |
| RealizedPlatform); |
| |
| AvailabilityResult Result = AR_Available; |
| std::string ResultMessage; |
| |
| for (const auto *A : attrs()) { |
| if (const auto *Deprecated = dyn_cast<DeprecatedAttr>(A)) { |
| if (Result >= AR_Deprecated) |
| continue; |
| |
| if (Message) |
| ResultMessage = std::string(Deprecated->getMessage()); |
| |
| Result = AR_Deprecated; |
| continue; |
| } |
| |
| if (const auto *Unavailable = dyn_cast<UnavailableAttr>(A)) { |
| if (Message) |
| *Message = std::string(Unavailable->getMessage()); |
| return AR_Unavailable; |
| } |
| |
| if (const auto *Availability = dyn_cast<AvailabilityAttr>(A)) { |
| AvailabilityResult AR = CheckAvailability(getASTContext(), Availability, |
| Message, EnclosingVersion); |
| |
| if (AR == AR_Unavailable) { |
| if (RealizedPlatform) |
| *RealizedPlatform = Availability->getPlatform()->getName(); |
| return AR_Unavailable; |
| } |
| |
| if (AR > Result) { |
| Result = AR; |
| if (Message) |
| ResultMessage.swap(*Message); |
| } |
| continue; |
| } |
| } |
| |
| if (Message) |
| Message->swap(ResultMessage); |
| return Result; |
| } |
| |
| VersionTuple Decl::getVersionIntroduced() const { |
| const ASTContext &Context = getASTContext(); |
| StringRef TargetPlatform = Context.getTargetInfo().getPlatformName(); |
| for (const auto *A : attrs()) { |
| if (const auto *Availability = dyn_cast<AvailabilityAttr>(A)) { |
| if (getRealizedPlatform(Availability, Context) != TargetPlatform) |
| continue; |
| if (!Availability->getIntroduced().empty()) |
| return Availability->getIntroduced(); |
| } |
| } |
| return {}; |
| } |
| |
| bool Decl::canBeWeakImported(bool &IsDefinition) const { |
| IsDefinition = false; |
| |
| // Variables, if they aren't definitions. |
| if (const auto *Var = dyn_cast<VarDecl>(this)) { |
| if (Var->isThisDeclarationADefinition()) { |
| IsDefinition = true; |
| return false; |
| } |
| return true; |
| } |
| // Functions, if they aren't definitions. |
| if (const auto *FD = dyn_cast<FunctionDecl>(this)) { |
| if (FD->hasBody()) { |
| IsDefinition = true; |
| return false; |
| } |
| return true; |
| |
| } |
| // Objective-C classes, if this is the non-fragile runtime. |
| if (isa<ObjCInterfaceDecl>(this) && |
| getASTContext().getLangOpts().ObjCRuntime.hasWeakClassImport()) { |
| return true; |
| } |
| // Nothing else. |
| return false; |
| } |
| |
| bool Decl::isWeakImported() const { |
| bool IsDefinition; |
| if (!canBeWeakImported(IsDefinition)) |
| return false; |
| |
| for (const auto *A : getMostRecentDecl()->attrs()) { |
| if (isa<WeakImportAttr>(A)) |
| return true; |
| |
| if (const auto *Availability = dyn_cast<AvailabilityAttr>(A)) { |
| if (CheckAvailability(getASTContext(), Availability, nullptr, |
| VersionTuple()) == AR_NotYetIntroduced) |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| unsigned Decl::getIdentifierNamespaceForKind(Kind DeclKind) { |
| switch (DeclKind) { |
| case Function: |
| case CXXDeductionGuide: |
| case CXXMethod: |
| case CXXConstructor: |
| case ConstructorUsingShadow: |
| case CXXDestructor: |
| case CXXConversion: |
| case EnumConstant: |
| case Var: |
| case ImplicitParam: |
| case ParmVar: |
| case ObjCMethod: |
| case ObjCProperty: |
| case MSProperty: |
| return IDNS_Ordinary; |
| case Label: |
| return IDNS_Label; |
| case IndirectField: |
| return IDNS_Ordinary | IDNS_Member; |
| |
| case Binding: |
| case NonTypeTemplateParm: |
| case VarTemplate: |
| case Concept: |
| // These (C++-only) declarations are found by redeclaration lookup for |
| // tag types, so we include them in the tag namespace. |
| return IDNS_Ordinary | IDNS_Tag; |
| |
| case ObjCCompatibleAlias: |
| case ObjCInterface: |
| return IDNS_Ordinary | IDNS_Type; |
| |
| case Typedef: |
| case TypeAlias: |
| case TemplateTypeParm: |
| case ObjCTypeParam: |
| return IDNS_Ordinary | IDNS_Type; |
| |
| case UnresolvedUsingTypename: |
| return IDNS_Ordinary | IDNS_Type | IDNS_Using; |
| |
| case UsingShadow: |
| return 0; // we'll actually overwrite this later |
| |
| case UnresolvedUsingValue: |
| return IDNS_Ordinary | IDNS_Using; |
| |
| case Using: |
| case UsingPack: |
| case UsingEnum: |
| 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: |
| case TypeAliasTemplate: |
| return IDNS_Ordinary | IDNS_Tag | IDNS_Type; |
| |
| case UnresolvedUsingIfExists: |
| return IDNS_Type | IDNS_Ordinary; |
| |
| case OMPDeclareReduction: |
| return IDNS_OMPReduction; |
| |
| case OMPDeclareMapper: |
| return IDNS_OMPMapper; |
| |
| // Never have names. |
| case Friend: |
| case FriendTemplate: |
| case AccessSpec: |
| case LinkageSpec: |
| case Export: |
| case FileScopeAsm: |
| case StaticAssert: |
| case ObjCPropertyImpl: |
| case PragmaComment: |
| case PragmaDetectMismatch: |
| case Block: |
| case Captured: |
| case TranslationUnit: |
| case ExternCContext: |
| case Decomposition: |
| case MSGuid: |
| case TemplateParamObject: |
| |
| case UsingDirective: |
| case BuiltinTemplate: |
| case ClassTemplateSpecialization: |
| case ClassTemplatePartialSpecialization: |
| case ClassScopeFunctionSpecialization: |
| case VarTemplateSpecialization: |
| case VarTemplatePartialSpecialization: |
| case ObjCImplementation: |
| case ObjCCategory: |
| case ObjCCategoryImpl: |
| case Import: |
| case OMPThreadPrivate: |
| case OMPAllocate: |
| case OMPRequires: |
| case OMPCapturedExpr: |
| case Empty: |
| case LifetimeExtendedTemporary: |
| case RequiresExprBody: |
| // 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); |
| } |
| |
| void Decl::addAttr(Attr *A) { |
| if (!hasAttrs()) { |
| setAttrs(AttrVec(1, A)); |
| return; |
| } |
| |
| AttrVec &Attrs = getAttrs(); |
| if (!A->isInherited()) { |
| Attrs.push_back(A); |
| return; |
| } |
| |
| // Attribute inheritance is processed after attribute parsing. To keep the |
| // order as in the source code, add inherited attributes before non-inherited |
| // ones. |
| auto I = Attrs.begin(), E = Attrs.end(); |
| for (; I != E; ++I) { |
| if (!(*I)->isInherited()) |
| break; |
| } |
| Attrs.insert(I, A); |
| } |
| |
| const AttrVec &Decl::getAttrs() const { |
| assert(HasAttrs && "No attrs to get!"); |
| return getASTContext().getDeclAttrs(this); |
| } |
| |
| 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 auto *FD = dyn_cast<FunctionDecl>(this)) { |
| const FunctionDecl *Definition; |
| if (FD->hasBody(Definition)) |
| return Definition->getSourceRange().getEnd(); |
| return {}; |
| } |
| |
| if (Stmt *Body = getBody()) |
| return Body->getSourceRange().getEnd(); |
| |
| return {}; |
| } |
| |
| bool Decl::AccessDeclContextCheck() 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. |
| // 7. it's a block literal declaration |
| // 8. it's a temporary with lifetime extended due to being default value. |
| if (isa<TranslationUnitDecl>(this) || isa<TemplateTypeParmDecl>(this) || |
| isa<NonTypeTemplateParmDecl>(this) || !getDeclContext() || |
| !isa<CXXRecordDecl>(getDeclContext()) || isInvalidDecl() || |
| isa<StaticAssertDecl>(this) || isa<BlockDecl>(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) || |
| isa<LifetimeExtendedTemporaryDecl>(this)) |
| return true; |
| |
| assert(Access != AS_none && |
| "Access specifier is AS_none inside a record decl"); |
| #endif |
| return true; |
| } |
| |
| static Decl::Kind getKind(const Decl *D) { return D->getKind(); } |
| static Decl::Kind getKind(const DeclContext *DC) { return DC->getDeclKind(); } |
| |
| int64_t Decl::getID() const { |
| return getASTContext().getAllocator().identifyKnownAlignedObject<Decl>(this); |
| } |
| |
| const FunctionType *Decl::getFunctionType(bool BlocksToo) const { |
| QualType Ty; |
| if (const auto *D = dyn_cast<ValueDecl>(this)) |
| Ty = D->getType(); |
| else if (const auto *D = dyn_cast<TypedefNameDecl>(this)) |
| Ty = D->getUnderlyingType(); |
| else |
| return nullptr; |
| |
| if (Ty->isFunctionPointerType()) |
| Ty = Ty->castAs<PointerType>()->getPointeeType(); |
| else if (Ty->isFunctionReferenceType()) |
| Ty = Ty->castAs<ReferenceType>()->getPointeeType(); |
| else if (BlocksToo && Ty->isBlockPointerType()) |
| Ty = Ty->castAs<BlockPointerType>()->getPointeeType(); |
| |
| return Ty->getAs<FunctionType>(); |
| } |
| |
| /// Starting at a given context (a Decl or DeclContext), look for a |
| /// code context that is not a closure (a lambda, block, etc.). |
| template <class T> static Decl *getNonClosureContext(T *D) { |
| if (getKind(D) == Decl::CXXMethod) { |
| auto *MD = cast<CXXMethodDecl>(D); |
| if (MD->getOverloadedOperator() == OO_Call && |
| MD->getParent()->isLambda()) |
| return getNonClosureContext(MD->getParent()->getParent()); |
| return MD; |
| } |
| if (auto *FD = dyn_cast<FunctionDecl>(D)) |
| return FD; |
| if (auto *MD = dyn_cast<ObjCMethodDecl>(D)) |
| return MD; |
| if (auto *BD = dyn_cast<BlockDecl>(D)) |
| return getNonClosureContext(BD->getParent()); |
| if (auto *CD = dyn_cast<CapturedDecl>(D)) |
| return getNonClosureContext(CD->getParent()); |
| return nullptr; |
| } |
| |
| Decl *Decl::getNonClosureContext() { |
| return ::getNonClosureContext(this); |
| } |
| |
| Decl *DeclContext::getNonClosureAncestor() { |
| return ::getNonClosureContext(this); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // DeclContext Implementation |
| //===----------------------------------------------------------------------===// |
| |
| DeclContext::DeclContext(Decl::Kind K) { |
| DeclContextBits.DeclKind = K; |
| setHasExternalLexicalStorage(false); |
| setHasExternalVisibleStorage(false); |
| setNeedToReconcileExternalVisibleStorage(false); |
| setHasLazyLocalLexicalLookups(false); |
| setHasLazyExternalLexicalLookups(false); |
| setUseQualifiedLookup(false); |
| } |
| |
| 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() = default; |
| |
| /// 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(); |
| |
| // A lookup within the call operator of a lambda never looks in the lambda |
| // class; instead, skip to the context in which that closure type is |
| // declared. |
| if (isLambdaCallOperator(this)) |
| return getParent()->getParent(); |
| |
| return getParent(); |
| } |
| |
| const BlockDecl *DeclContext::getInnermostBlockDecl() const { |
| const DeclContext *Ctx = this; |
| |
| do { |
| if (Ctx->isClosure()) |
| return cast<BlockDecl>(Ctx); |
| Ctx = Ctx->getParent(); |
| } while (Ctx); |
| |
| return nullptr; |
| } |
| |
| bool DeclContext::isInlineNamespace() const { |
| return isNamespace() && |
| cast<NamespaceDecl>(this)->isInline(); |
| } |
| |
| bool DeclContext::isStdNamespace() const { |
| if (!isNamespace()) |
| return false; |
| |
| const auto *ND = cast<NamespaceDecl>(this); |
| if (ND->isInline()) { |
| return ND->getParent()->isStdNamespace(); |
| } |
| |
| if (!getParent()->getRedeclContext()->isTranslationUnit()) |
| return false; |
| |
| const IdentifierInfo *II = ND->getIdentifier(); |
| return II && II->isStr("std"); |
| } |
| |
| bool DeclContext::isDependentContext() const { |
| if (isFileContext()) |
| return false; |
| |
| if (isa<ClassTemplatePartialSpecializationDecl>(this)) |
| return true; |
| |
| if (const auto *Record = dyn_cast<CXXRecordDecl>(this)) { |
| if (Record->getDescribedClassTemplate()) |
| return true; |
| |
| if (Record->isDependentLambda()) |
| return true; |
| } |
| |
| if (const auto *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(); |
| } |
| |
| // FIXME: A variable template is a dependent context, but is not a |
| // DeclContext. A context within it (such as a lambda-expression) |
| // should be considered dependent. |
| |
| return getParent() && getParent()->isDependentContext(); |
| } |
| |
| bool DeclContext::isTransparentContext() const { |
| if (getDeclKind() == Decl::Enum) |
| return !cast<EnumDecl>(this)->isScoped(); |
| |
| return getDeclKind() == Decl::LinkageSpec || getDeclKind() == Decl::Export; |
| } |
| |
| static bool isLinkageSpecContext(const DeclContext *DC, |
| LinkageSpecDecl::LanguageIDs ID) { |
| while (DC->getDeclKind() != Decl::TranslationUnit) { |
| if (DC->getDeclKind() == Decl::LinkageSpec) |
| return cast<LinkageSpecDecl>(DC)->getLanguage() == ID; |
| DC = DC->getLexicalParent(); |
| } |
| return false; |
| } |
| |
| bool DeclContext::isExternCContext() const { |
| return isLinkageSpecContext(this, LinkageSpecDecl::lang_c); |
| } |
| |
| const LinkageSpecDecl *DeclContext::getExternCContext() const { |
| const DeclContext *DC = this; |
| while (DC->getDeclKind() != Decl::TranslationUnit) { |
| if (DC->getDeclKind() == Decl::LinkageSpec && |
| cast<LinkageSpecDecl>(DC)->getLanguage() == LinkageSpecDecl::lang_c) |
| return cast<LinkageSpecDecl>(DC); |
| DC = DC->getLexicalParent(); |
| } |
| return nullptr; |
| } |
| |
| bool DeclContext::isExternCXXContext() const { |
| return isLinkageSpecContext(this, LinkageSpecDecl::lang_cxx); |
| } |
| |
| bool DeclContext::Encloses(const DeclContext *DC) const { |
| if (getPrimaryContext() != this) |
| return getPrimaryContext()->Encloses(DC); |
| |
| for (; DC; DC = DC->getParent()) |
| if (!isa<LinkageSpecDecl>(DC) && DC->getPrimaryContext() == this) |
| return true; |
| return false; |
| } |
| |
| DeclContext *DeclContext::getNonTransparentContext() { |
| DeclContext *DC = this; |
| while (DC->isTransparentContext()) { |
| DC = DC->getParent(); |
| assert(DC && "All transparent contexts should have a parent!"); |
| } |
| return DC; |
| } |
| |
| DeclContext *DeclContext::getPrimaryContext() { |
| switch (getDeclKind()) { |
| case Decl::ExternCContext: |
| case Decl::LinkageSpec: |
| case Decl::Export: |
| case Decl::Block: |
| case Decl::Captured: |
| case Decl::OMPDeclareReduction: |
| case Decl::OMPDeclareMapper: |
| case Decl::RequiresExprBody: |
| // There is only one DeclContext for these entities. |
| return this; |
| |
| case Decl::TranslationUnit: |
| return static_cast<TranslationUnitDecl *>(this)->getFirstDecl(); |
| 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 (auto *OID = dyn_cast<ObjCInterfaceDecl>(this)) |
| if (auto *Def = OID->getDefinition()) |
| return Def; |
| return this; |
| |
| case Decl::ObjCProtocol: |
| if (auto *OPD = dyn_cast<ObjCProtocolDecl>(this)) |
| if (auto *Def = OPD->getDefinition()) |
| return Def; |
| return this; |
| |
| case Decl::ObjCCategory: |
| return this; |
| |
| case Decl::ObjCImplementation: |
| case Decl::ObjCCategoryImpl: |
| return this; |
| |
| default: |
| if (getDeclKind() >= Decl::firstTag && getDeclKind() <= Decl::lastTag) { |
| // If this is a tag type that has a definition or is currently |
| // being defined, that definition is our primary context. |
| auto *Tag = cast<TagDecl>(this); |
| |
| if (TagDecl *Def = Tag->getDefinition()) |
| return Def; |
| |
| if (const auto *TagTy = dyn_cast<TagType>(Tag->getTypeForDecl())) { |
| // Note, TagType::getDecl returns the (partial) definition one exists. |
| TagDecl *PossiblePartialDef = TagTy->getDecl(); |
| if (PossiblePartialDef->isBeingDefined()) |
| return PossiblePartialDef; |
| } else { |
| assert(isa<InjectedClassNameType>(Tag->getTypeForDecl())); |
| } |
| |
| return Tag; |
| } |
| |
| assert(getDeclKind() >= Decl::firstFunction && |
| getDeclKind() <= Decl::lastFunction && |
| "Unknown DeclContext kind"); |
| return this; |
| } |
| } |
| |
| template <typename T> |
| void collectAllContextsImpl(T *Self, SmallVectorImpl<DeclContext *> &Contexts) { |
| for (T *D = Self->getMostRecentDecl(); D; D = D->getPreviousDecl()) |
| Contexts.push_back(D); |
| |
| std::reverse(Contexts.begin(), Contexts.end()); |
| } |
| |
| void DeclContext::collectAllContexts(SmallVectorImpl<DeclContext *> &Contexts) { |
| Contexts.clear(); |
| |
| Decl::Kind Kind = getDeclKind(); |
| |
| if (Kind == Decl::TranslationUnit) |
| collectAllContextsImpl(static_cast<TranslationUnitDecl *>(this), Contexts); |
| else if (Kind == Decl::Namespace) |
| collectAllContextsImpl(static_cast<NamespaceDecl *>(this), Contexts); |
| else |
| Contexts.push_back(this); |
| } |
| |
| std::pair<Decl *, Decl *> |
| DeclContext::BuildDeclChain(ArrayRef<Decl *> Decls, |
| bool FieldsAlreadyLoaded) { |
| // Build up a chain of declarations via the Decl::NextInContextAndBits field. |
| Decl *FirstNewDecl = nullptr; |
| Decl *PrevDecl = nullptr; |
| for (auto *D : Decls) { |
| if (FieldsAlreadyLoaded && isa<FieldDecl>(D)) |
| continue; |
| |
| if (PrevDecl) |
| PrevDecl->NextInContextAndBits.setPointer(D); |
| else |
| FirstNewDecl = D; |
| |
| PrevDecl = D; |
| } |
| |
| return std::make_pair(FirstNewDecl, PrevDecl); |
| } |
| |
| /// We have just acquired external visible storage, and we already have |
| /// built a lookup map. For every name in the map, pull in the new names from |
| /// the external storage. |
| void DeclContext::reconcileExternalVisibleStorage() const { |
| assert(hasNeedToReconcileExternalVisibleStorage() && LookupPtr); |
| setNeedToReconcileExternalVisibleStorage(false); |
| |
| for (auto &Lookup : *LookupPtr) |
| Lookup.second.setHasExternalDecls(); |
| } |
| |
| /// Load the declarations within this lexical storage from an |
| /// external source. |
| /// \return \c true if any declarations were added. |
| bool |
| 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; |
| setHasExternalLexicalStorage(false); |
| Source->FindExternalLexicalDecls(this, Decls); |
| |
| if (Decls.empty()) |
| return false; |
| |
| // We may have already loaded just the fields of this record, in which case |
| // we need to ignore them. |
| bool FieldsAlreadyLoaded = false; |
| if (const auto *RD = dyn_cast<RecordDecl>(this)) |
| FieldsAlreadyLoaded = RD->hasLoadedFieldsFromExternalStorage(); |
| |
| // Splice the newly-read declarations into the beginning of the list |
| // of declarations. |
| Decl *ExternalFirst, *ExternalLast; |
| std::tie(ExternalFirst, ExternalLast) = |
| BuildDeclChain(Decls, FieldsAlreadyLoaded); |
| ExternalLast->NextInContextAndBits.setPointer(FirstDecl); |
| FirstDecl = ExternalFirst; |
| if (!LastDecl) |
| LastDecl = ExternalLast; |
| return true; |
| } |
| |
| DeclContext::lookup_result |
| ExternalASTSource::SetNoExternalVisibleDeclsForName(const DeclContext *DC, |
| DeclarationName Name) { |
| ASTContext &Context = DC->getParentASTContext(); |
| StoredDeclsMap *Map; |
| if (!(Map = DC->LookupPtr)) |
| Map = DC->CreateStoredDeclsMap(Context); |
| if (DC->hasNeedToReconcileExternalVisibleStorage()) |
| DC->reconcileExternalVisibleStorage(); |
| |
| (*Map)[Name].removeExternalDecls(); |
| |
| 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)) |
| Map = DC->CreateStoredDeclsMap(Context); |
| if (DC->hasNeedToReconcileExternalVisibleStorage()) |
| DC->reconcileExternalVisibleStorage(); |
| |
| StoredDeclsList &List = (*Map)[Name]; |
| List.replaceExternalDecls(Decls); |
| return List.getLookupResult(); |
| } |
| |
| DeclContext::decl_iterator DeclContext::decls_begin() const { |
| if (hasExternalLexicalStorage()) |
| LoadLexicalDeclsFromExternalStorage(); |
| return decl_iterator(FirstDecl); |
| } |
| |
| bool DeclContext::decls_empty() const { |
| if (hasExternalLexicalStorage()) |
| LoadLexicalDeclsFromExternalStorage(); |
| |
| return !FirstDecl; |
| } |
| |
| bool DeclContext::containsDecl(Decl *D) const { |
| return (D->getLexicalDeclContext() == this && |
| (D->NextInContextAndBits.getPointer() || D == LastDecl)); |
| } |
| |
| bool DeclContext::containsDeclAndLoad(Decl *D) const { |
| if (hasExternalLexicalStorage()) |
| LoadLexicalDeclsFromExternalStorage(); |
| return containsDecl(D); |
| } |
| |
| /// 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 friends and local extern declarations unless they're the first |
| // declaration of the entity. |
| if ((D->isLocalExternDecl() || D->getFriendObjectKind()) && |
| D != D->getCanonicalDecl()) |
| 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 (auto *FD = dyn_cast<FunctionDecl>(D)) |
| if (FD->isFunctionTemplateSpecialization()) |
| return true; |
| |
| // Hide destructors that are invalid. There should always be one destructor, |
| // but if it is an invalid decl, another one is created. We need to hide the |
| // invalid one from places that expect exactly one destructor, like the |
| // serialization code. |
| if (isa<CXXDestructorDecl>(D) && D->isInvalidDecl()) |
| return true; |
| |
| return false; |
| } |
| |
| 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 = nullptr; |
| 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(nullptr); |
| |
| // Remove D from the lookup table if necessary. |
| if (isa<NamedDecl>(D)) { |
| auto *ND = cast<NamedDecl>(D); |
| |
| // Do not try to remove the declaration if that is invisible to qualified |
| // lookup. E.g. template specializations are skipped. |
| if (shouldBeHidden(ND)) |
| return; |
| |
| // Remove only decls that have a name |
| if (!ND->getDeclName()) |
| return; |
| |
| auto *DC = D->getDeclContext(); |
| do { |
| StoredDeclsMap *Map = DC->getPrimaryContext()->LookupPtr; |
| if (Map) { |
| StoredDeclsMap::iterator Pos = Map->find(ND->getDeclName()); |
| assert(Pos != Map->end() && "no lookup entry for decl"); |
| Pos->second.remove(ND); |
| } |
| } while (DC->isTransparentContext() && (DC = DC->getParent())); |
| } |
| } |
| |
| 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 its class-specific state. |
| if (auto *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 (auto *Import = dyn_cast<ImportDecl>(D)) |
| D->getASTContext().addedLocalImportDecl(Import); |
| } |
| } |
| |
| void DeclContext::addDecl(Decl *D) { |
| addHiddenDecl(D); |
| |
| if (auto *ND = dyn_cast<NamedDecl>(D)) |
| ND->getDeclContext()->getPrimaryContext()-> |
| makeDeclVisibleInContextWithFlags(ND, false, true); |
| } |
| |
| void DeclContext::addDeclInternal(Decl *D) { |
| addHiddenDecl(D); |
| |
| if (auto *ND = dyn_cast<NamedDecl>(D)) |
| ND->getDeclContext()->getPrimaryContext()-> |
| makeDeclVisibleInContextWithFlags(ND, true, true); |
| } |
| |
| /// 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. |
| /// |
| /// Note that the produced map may miss out declarations from an |
| /// external source. If it does, those entries will be marked with |
| /// the 'hasExternalDecls' flag. |
| StoredDeclsMap *DeclContext::buildLookup() { |
| assert(this == getPrimaryContext() && "buildLookup called on non-primary DC"); |
| |
| if (!hasLazyLocalLexicalLookups() && |
| !hasLazyExternalLexicalLookups()) |
| return LookupPtr; |
| |
| SmallVector<DeclContext *, 2> Contexts; |
| collectAllContexts(Contexts); |
| |
| if (hasLazyExternalLexicalLookups()) { |
| setHasLazyExternalLexicalLookups(false); |
| for (auto *DC : Contexts) { |
| if (DC->hasExternalLexicalStorage()) { |
| bool LoadedDecls = DC->LoadLexicalDeclsFromExternalStorage(); |
| setHasLazyLocalLexicalLookups( |
| hasLazyLocalLexicalLookups() | LoadedDecls ); |
| } |
| } |
| |
| if (!hasLazyLocalLexicalLookups()) |
| return LookupPtr; |
| } |
| |
| for (auto *DC : Contexts) |
| buildLookupImpl(DC, hasExternalVisibleStorage()); |
| |
| // We no longer have any lazy decls. |
| setHasLazyLocalLexicalLookups(false); |
| return LookupPtr; |
| } |
| |
| /// 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, bool Internal) { |
| for (auto *D : DCtx->noload_decls()) { |
| // 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 it's from an AST file, don't add it now. It'll get handled by |
| // FindExternalVisibleDeclsByName if needed. Exception: if we're not |
| // in C++, we do not track external visible decls for the TU, so in |
| // that case we need to collect them all here. |
| if (auto *ND = dyn_cast<NamedDecl>(D)) |
| if (ND->getDeclContext() == DCtx && !shouldBeHidden(ND) && |
| (!ND->isFromASTFile() || |
| (isTranslationUnit() && |
| !getParentASTContext().getLangOpts().CPlusPlus))) |
| makeDeclVisibleInContextImpl(ND, Internal); |
| |
| // If this declaration is itself a transparent declaration context |
| // or inline namespace, add the members of this declaration of that |
| // context (recursively). |
| if (auto *InnerCtx = dyn_cast<DeclContext>(D)) |
| if (InnerCtx->isTransparentContext() || InnerCtx->isInlineNamespace()) |
| buildLookupImpl(InnerCtx, Internal); |
| } |
| } |
| |
| DeclContext::lookup_result |
| DeclContext::lookup(DeclarationName Name) const { |
| assert(getDeclKind() != Decl::LinkageSpec && |
| getDeclKind() != Decl::Export && |
| "should not perform lookups into transparent contexts"); |
| |
| const DeclContext *PrimaryContext = getPrimaryContext(); |
| if (PrimaryContext != this) |
| return PrimaryContext->lookup(Name); |
| |
| // If we have an external source, ensure that any later redeclarations of this |
| // context have been loaded, since they may add names to the result of this |
| // lookup (or add external visible storage). |
| ExternalASTSource *Source = getParentASTContext().getExternalSource(); |
| if (Source) |
| (void)cast<Decl>(this)->getMostRecentDecl(); |
| |
| if (hasExternalVisibleStorage()) { |
| assert(Source && "external visible storage but no external source?"); |
| |
| if (hasNeedToReconcileExternalVisibleStorage()) |
| reconcileExternalVisibleStorage(); |
| |
| StoredDeclsMap *Map = LookupPtr; |
| |
| if (hasLazyLocalLexicalLookups() || |
| hasLazyExternalLexicalLookups()) |
| // FIXME: Make buildLookup const? |
| Map = const_cast<DeclContext*>(this)->buildLookup(); |
| |
| if (!Map) |
| Map = CreateStoredDeclsMap(getParentASTContext()); |
| |
| // If we have a lookup result with no external decls, we are done. |
| std::pair<StoredDeclsMap::iterator, bool> R = |
| Map->insert(std::make_pair(Name, StoredDeclsList())); |
| if (!R.second && !R.first->second.hasExternalDecls()) |
| return R.first->second.getLookupResult(); |
| |
| if (Source->FindExternalVisibleDeclsByName(this, Name) || !R.second) { |
| if (StoredDeclsMap *Map = LookupPtr) { |
| StoredDeclsMap::iterator I = Map->find(Name); |
| if (I != Map->end()) |
| return I->second.getLookupResult(); |
| } |
| } |
| |
| return {}; |
| } |
| |
| StoredDeclsMap *Map = LookupPtr; |
| if (hasLazyLocalLexicalLookups() || |
| hasLazyExternalLexicalLookups()) |
| Map = const_cast<DeclContext*>(this)->buildLookup(); |
| |
| if (!Map) |
| return {}; |
| |
| StoredDeclsMap::iterator I = Map->find(Name); |
| if (I == Map->end()) |
| return {}; |
| |
| return I->second.getLookupResult(); |
| } |
| |
| DeclContext::lookup_result |
| DeclContext::noload_lookup(DeclarationName Name) { |
| assert(getDeclKind() != Decl::LinkageSpec && |
| getDeclKind() != Decl::Export && |
| "should not perform lookups into transparent contexts"); |
| |
| DeclContext *PrimaryContext = getPrimaryContext(); |
| if (PrimaryContext != this) |
| return PrimaryContext->noload_lookup(Name); |
| |
| loadLazyLocalLexicalLookups(); |
| StoredDeclsMap *Map = LookupPtr; |
| if (!Map) |
| return {}; |
| |
| StoredDeclsMap::iterator I = Map->find(Name); |
| return I != Map->end() ? I->second.getLookupResult() |
| : lookup_result(); |
| } |
| |
| // If we have any lazy lexical declarations not in our lookup map, add them |
| // now. Don't import any external declarations, not even if we know we have |
| // some missing from the external visible lookups. |
| void DeclContext::loadLazyLocalLexicalLookups() { |
| if (hasLazyLocalLexicalLookups()) { |
| SmallVector<DeclContext *, 2> Contexts; |
| collectAllContexts(Contexts); |
| for (auto *Context : Contexts) |
| buildLookupImpl(Context, hasExternalVisibleStorage()); |
| setHasLazyLocalLexicalLookups(false); |
| } |
| } |
| |
| void DeclContext::localUncachedLookup(DeclarationName Name, |
| 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.begin(), LookupResults.end()); |
| return; |
| } |
| |
| // If we have a lookup table, check there first. Maybe we'll get lucky. |
| // FIXME: Should we be checking these flags on the primary context? |
| if (Name && !hasLazyLocalLexicalLookups() && |
| !hasLazyExternalLexicalLookups()) { |
| if (StoredDeclsMap *Map = LookupPtr) { |
| StoredDeclsMap::iterator Pos = Map->find(Name); |
| if (Pos != Map->end()) { |
| Results.insert(Results.end(), |
| Pos->second.getLookupResult().begin(), |
| Pos->second.getLookupResult().end()); |
| return; |
| } |
| } |
| } |
| |
| // Slow case: grovel through the declarations in our chain looking for |
| // matches. |
| // FIXME: If we have lazy external declarations, this will not find them! |
| // FIXME: Should we CollectAllContexts and walk them all here? |
| for (Decl *D = FirstDecl; D; D = D->getNextDeclInContext()) { |
| if (auto *ND = dyn_cast<NamedDecl>(D)) |
| if (ND->getDeclName() == Name) |
| Results.push_back(ND); |
| } |
| } |
| |
| DeclContext *DeclContext::getRedeclContext() { |
| DeclContext *Ctx = this; |
| |
| // In C, a record type is the redeclaration context for its fields only. If |
| // we arrive at a record context after skipping anything else, we should skip |
| // the record as well. Currently, this means skipping enumerations because |
| // they're the only transparent context that can exist within a struct or |
| // union. |
| bool SkipRecords = getDeclKind() == Decl::Kind::Enum && |
| !getParentASTContext().getLangOpts().CPlusPlus; |
| |
| // Skip through contexts to get to the redeclaration context. Transparent |
| // contexts are always skipped. |
| while ((SkipRecords && Ctx->isRecord()) || 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(); |
| } |
| |
| RecordDecl *DeclContext::getOuterLexicalRecordContext() { |
| // Loop until we find a non-record context. |
| RecordDecl *OutermostRD = nullptr; |
| DeclContext *DC = this; |
| while (DC->isRecord()) { |
| OutermostRD = cast<RecordDecl>(DC); |
| DC = DC->getLexicalParent(); |
| } |
| return OutermostRD; |
| } |
| |
| 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 auto *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"); |
| |
| if (!isLookupContext()) { |
| if (isTransparentContext()) |
| getParent()->getPrimaryContext() |
| ->makeDeclVisibleInContextWithFlags(D, Internal, Recoverable); |
| 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 || 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 { |
| setHasLazyLocalLexicalLookups(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); |
| |
| auto *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; |
| 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 (Internal) { |
| // If this is being added as part of loading an external declaration, |
| // this may not be the only external declaration with this name. |
| // In this case, we never try to replace an existing declaration; we'll |
| // handle that when we finalize the list of declarations for this name. |
| DeclNameEntries.setHasExternalDecls(); |
| DeclNameEntries.prependDeclNoReplace(D); |
| return; |
| } |
| |
| DeclNameEntries.addOrReplaceDecl(D); |
| } |
| |
| UsingDirectiveDecl *DeclContext::udir_iterator::operator*() const { |
| return cast<UsingDirectiveDecl>(*I); |
| } |
| |
| /// Returns iterator range [First, Last) of UsingDirectiveDecls stored within |
| /// this context. |
| DeclContext::udir_range DeclContext::using_directives() const { |
| // FIXME: Use something more efficient than normal lookup for using |
| // directives. In C++, using directives are looked up more than anything else. |
| lookup_result Result = lookup(UsingDirectiveDecl::getName()); |
| return udir_range(Result.begin(), Result.end()); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Creation and Destruction of StoredDeclsMaps. // |
| //===----------------------------------------------------------------------===// |
| |
| StoredDeclsMap *DeclContext::CreateStoredDeclsMap(ASTContext &C) const { |
| assert(!LookupPtr && "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 = 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()); |
| LastSDM.setPointer(nullptr); |
| } |
| |
| 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) |
| Parent->CreateStoredDeclsMap(C); |
| |
| auto *Map = static_cast<DependentStoredDeclsMap *>(Parent->LookupPtr); |
| |
| // Allocate the copy of the PartialDiagnostic via the ASTContext's |
| // BumpPtrAllocator, rather than the ASTContext itself. |
| DiagnosticStorage *DiagStorage = nullptr; |
| if (PDiag.hasStorage()) |
| DiagStorage = new (C) DiagnosticStorage; |
| |
| auto *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; |
| } |