forked from OSchip/llvm-project
3354 lines
129 KiB
C++
3354 lines
129 KiB
C++
//===- DeclCXX.cpp - C++ Declaration AST Node Implementation --------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the C++ related Decl classes.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/DeclCXX.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/ASTLambda.h"
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#include "clang/AST/ASTMutationListener.h"
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#include "clang/AST/ASTUnresolvedSet.h"
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#include "clang/AST/Attr.h"
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#include "clang/AST/CXXInheritance.h"
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#include "clang/AST/DeclBase.h"
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#include "clang/AST/DeclTemplate.h"
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#include "clang/AST/DeclarationName.h"
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#include "clang/AST/Expr.h"
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#include "clang/AST/ExprCXX.h"
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#include "clang/AST/LambdaCapture.h"
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#include "clang/AST/NestedNameSpecifier.h"
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#include "clang/AST/ODRHash.h"
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#include "clang/AST/Type.h"
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#include "clang/AST/TypeLoc.h"
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#include "clang/AST/UnresolvedSet.h"
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Basic/IdentifierTable.h"
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#include "clang/Basic/LLVM.h"
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#include "clang/Basic/LangOptions.h"
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#include "clang/Basic/OperatorKinds.h"
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#include "clang/Basic/PartialDiagnostic.h"
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#include "clang/Basic/SourceLocation.h"
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#include "clang/Basic/Specifiers.h"
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#include "llvm/ADT/None.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/iterator_range.h"
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cassert>
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#include <cstddef>
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#include <cstdint>
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using namespace clang;
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//===----------------------------------------------------------------------===//
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// Decl Allocation/Deallocation Method Implementations
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//===----------------------------------------------------------------------===//
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void AccessSpecDecl::anchor() {}
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AccessSpecDecl *AccessSpecDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
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return new (C, ID) AccessSpecDecl(EmptyShell());
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}
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void LazyASTUnresolvedSet::getFromExternalSource(ASTContext &C) const {
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ExternalASTSource *Source = C.getExternalSource();
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assert(Impl.Decls.isLazy() && "getFromExternalSource for non-lazy set");
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assert(Source && "getFromExternalSource with no external source");
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for (ASTUnresolvedSet::iterator I = Impl.begin(); I != Impl.end(); ++I)
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I.setDecl(cast<NamedDecl>(Source->GetExternalDecl(
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reinterpret_cast<uintptr_t>(I.getDecl()) >> 2)));
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Impl.Decls.setLazy(false);
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}
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CXXRecordDecl::DefinitionData::DefinitionData(CXXRecordDecl *D)
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: UserDeclaredConstructor(false), UserDeclaredSpecialMembers(0),
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Aggregate(true), PlainOldData(true), Empty(true), Polymorphic(false),
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Abstract(false), IsStandardLayout(true), IsCXX11StandardLayout(true),
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HasBasesWithFields(false), HasBasesWithNonStaticDataMembers(false),
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HasPrivateFields(false), HasProtectedFields(false),
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HasPublicFields(false), HasMutableFields(false), HasVariantMembers(false),
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HasOnlyCMembers(true), HasInClassInitializer(false),
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HasUninitializedReferenceMember(false), HasUninitializedFields(false),
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HasInheritedConstructor(false), HasInheritedAssignment(false),
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NeedOverloadResolutionForCopyConstructor(false),
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NeedOverloadResolutionForMoveConstructor(false),
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NeedOverloadResolutionForCopyAssignment(false),
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NeedOverloadResolutionForMoveAssignment(false),
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NeedOverloadResolutionForDestructor(false),
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DefaultedCopyConstructorIsDeleted(false),
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DefaultedMoveConstructorIsDeleted(false),
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DefaultedCopyAssignmentIsDeleted(false),
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DefaultedMoveAssignmentIsDeleted(false),
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DefaultedDestructorIsDeleted(false), HasTrivialSpecialMembers(SMF_All),
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HasTrivialSpecialMembersForCall(SMF_All),
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DeclaredNonTrivialSpecialMembers(0),
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DeclaredNonTrivialSpecialMembersForCall(0), HasIrrelevantDestructor(true),
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HasConstexprNonCopyMoveConstructor(false),
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HasDefaultedDefaultConstructor(false),
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DefaultedDefaultConstructorIsConstexpr(true),
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HasConstexprDefaultConstructor(false),
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DefaultedDestructorIsConstexpr(true),
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HasNonLiteralTypeFieldsOrBases(false), StructuralIfLiteral(true),
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UserProvidedDefaultConstructor(false), DeclaredSpecialMembers(0),
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ImplicitCopyConstructorCanHaveConstParamForVBase(true),
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ImplicitCopyConstructorCanHaveConstParamForNonVBase(true),
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ImplicitCopyAssignmentHasConstParam(true),
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HasDeclaredCopyConstructorWithConstParam(false),
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HasDeclaredCopyAssignmentWithConstParam(false), IsLambda(false),
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IsParsingBaseSpecifiers(false), ComputedVisibleConversions(false),
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HasODRHash(false), Definition(D) {}
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CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getBasesSlowCase() const {
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return Bases.get(Definition->getASTContext().getExternalSource());
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}
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CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getVBasesSlowCase() const {
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return VBases.get(Definition->getASTContext().getExternalSource());
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}
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CXXRecordDecl::CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C,
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DeclContext *DC, SourceLocation StartLoc,
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SourceLocation IdLoc, IdentifierInfo *Id,
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CXXRecordDecl *PrevDecl)
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: RecordDecl(K, TK, C, DC, StartLoc, IdLoc, Id, PrevDecl),
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DefinitionData(PrevDecl ? PrevDecl->DefinitionData
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: nullptr) {}
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CXXRecordDecl *CXXRecordDecl::Create(const ASTContext &C, TagKind TK,
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DeclContext *DC, SourceLocation StartLoc,
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SourceLocation IdLoc, IdentifierInfo *Id,
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CXXRecordDecl *PrevDecl,
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bool DelayTypeCreation) {
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auto *R = new (C, DC) CXXRecordDecl(CXXRecord, TK, C, DC, StartLoc, IdLoc, Id,
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PrevDecl);
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R->setMayHaveOutOfDateDef(C.getLangOpts().Modules);
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// FIXME: DelayTypeCreation seems like such a hack
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if (!DelayTypeCreation)
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C.getTypeDeclType(R, PrevDecl);
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return R;
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}
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CXXRecordDecl *
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CXXRecordDecl::CreateLambda(const ASTContext &C, DeclContext *DC,
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TypeSourceInfo *Info, SourceLocation Loc,
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bool Dependent, bool IsGeneric,
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LambdaCaptureDefault CaptureDefault) {
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auto *R = new (C, DC) CXXRecordDecl(CXXRecord, TTK_Class, C, DC, Loc, Loc,
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nullptr, nullptr);
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R->setBeingDefined(true);
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R->DefinitionData =
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new (C) struct LambdaDefinitionData(R, Info, Dependent, IsGeneric,
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CaptureDefault);
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R->setMayHaveOutOfDateDef(false);
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R->setImplicit(true);
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C.getTypeDeclType(R, /*PrevDecl=*/nullptr);
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return R;
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}
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CXXRecordDecl *
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CXXRecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) {
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auto *R = new (C, ID) CXXRecordDecl(
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CXXRecord, TTK_Struct, C, nullptr, SourceLocation(), SourceLocation(),
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nullptr, nullptr);
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R->setMayHaveOutOfDateDef(false);
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return R;
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}
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/// Determine whether a class has a repeated base class. This is intended for
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/// use when determining if a class is standard-layout, so makes no attempt to
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/// handle virtual bases.
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static bool hasRepeatedBaseClass(const CXXRecordDecl *StartRD) {
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llvm::SmallPtrSet<const CXXRecordDecl*, 8> SeenBaseTypes;
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SmallVector<const CXXRecordDecl*, 8> WorkList = {StartRD};
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while (!WorkList.empty()) {
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const CXXRecordDecl *RD = WorkList.pop_back_val();
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for (const CXXBaseSpecifier &BaseSpec : RD->bases()) {
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if (const CXXRecordDecl *B = BaseSpec.getType()->getAsCXXRecordDecl()) {
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if (!SeenBaseTypes.insert(B).second)
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return true;
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WorkList.push_back(B);
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}
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}
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}
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return false;
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}
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void
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CXXRecordDecl::setBases(CXXBaseSpecifier const * const *Bases,
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unsigned NumBases) {
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ASTContext &C = getASTContext();
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if (!data().Bases.isOffset() && data().NumBases > 0)
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C.Deallocate(data().getBases());
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if (NumBases) {
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if (!C.getLangOpts().CPlusPlus17) {
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// C++ [dcl.init.aggr]p1:
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// An aggregate is [...] a class with [...] no base classes [...].
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data().Aggregate = false;
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}
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// C++ [class]p4:
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// A POD-struct is an aggregate class...
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data().PlainOldData = false;
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}
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// The set of seen virtual base types.
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llvm::SmallPtrSet<CanQualType, 8> SeenVBaseTypes;
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// The virtual bases of this class.
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SmallVector<const CXXBaseSpecifier *, 8> VBases;
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data().Bases = new(C) CXXBaseSpecifier [NumBases];
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data().NumBases = NumBases;
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for (unsigned i = 0; i < NumBases; ++i) {
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data().getBases()[i] = *Bases[i];
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// Keep track of inherited vbases for this base class.
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const CXXBaseSpecifier *Base = Bases[i];
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QualType BaseType = Base->getType();
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// Skip dependent types; we can't do any checking on them now.
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if (BaseType->isDependentType())
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continue;
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auto *BaseClassDecl =
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cast<CXXRecordDecl>(BaseType->castAs<RecordType>()->getDecl());
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// C++2a [class]p7:
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// A standard-layout class is a class that:
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// [...]
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// -- has all non-static data members and bit-fields in the class and
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// its base classes first declared in the same class
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if (BaseClassDecl->data().HasBasesWithFields ||
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!BaseClassDecl->field_empty()) {
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if (data().HasBasesWithFields)
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// Two bases have members or bit-fields: not standard-layout.
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data().IsStandardLayout = false;
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data().HasBasesWithFields = true;
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}
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// C++11 [class]p7:
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// A standard-layout class is a class that:
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// -- [...] has [...] at most one base class with non-static data
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// members
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if (BaseClassDecl->data().HasBasesWithNonStaticDataMembers ||
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BaseClassDecl->hasDirectFields()) {
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if (data().HasBasesWithNonStaticDataMembers)
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data().IsCXX11StandardLayout = false;
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data().HasBasesWithNonStaticDataMembers = true;
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}
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if (!BaseClassDecl->isEmpty()) {
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// C++14 [meta.unary.prop]p4:
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// T is a class type [...] with [...] no base class B for which
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// is_empty<B>::value is false.
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data().Empty = false;
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}
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// C++1z [dcl.init.agg]p1:
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// An aggregate is a class with [...] no private or protected base classes
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if (Base->getAccessSpecifier() != AS_public) {
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data().Aggregate = false;
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// C++20 [temp.param]p7:
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// A structural type is [...] a literal class type with [...] all base
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// classes [...] public
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data().StructuralIfLiteral = false;
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}
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// C++ [class.virtual]p1:
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// A class that declares or inherits a virtual function is called a
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// polymorphic class.
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if (BaseClassDecl->isPolymorphic()) {
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data().Polymorphic = true;
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// An aggregate is a class with [...] no virtual functions.
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data().Aggregate = false;
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}
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// C++0x [class]p7:
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// A standard-layout class is a class that: [...]
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// -- has no non-standard-layout base classes
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if (!BaseClassDecl->isStandardLayout())
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data().IsStandardLayout = false;
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if (!BaseClassDecl->isCXX11StandardLayout())
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data().IsCXX11StandardLayout = false;
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// Record if this base is the first non-literal field or base.
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if (!hasNonLiteralTypeFieldsOrBases() && !BaseType->isLiteralType(C))
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data().HasNonLiteralTypeFieldsOrBases = true;
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// Now go through all virtual bases of this base and add them.
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for (const auto &VBase : BaseClassDecl->vbases()) {
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// Add this base if it's not already in the list.
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if (SeenVBaseTypes.insert(C.getCanonicalType(VBase.getType())).second) {
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VBases.push_back(&VBase);
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// C++11 [class.copy]p8:
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// The implicitly-declared copy constructor for a class X will have
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// the form 'X::X(const X&)' if each [...] virtual base class B of X
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// has a copy constructor whose first parameter is of type
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// 'const B&' or 'const volatile B&' [...]
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if (CXXRecordDecl *VBaseDecl = VBase.getType()->getAsCXXRecordDecl())
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if (!VBaseDecl->hasCopyConstructorWithConstParam())
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data().ImplicitCopyConstructorCanHaveConstParamForVBase = false;
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// C++1z [dcl.init.agg]p1:
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// An aggregate is a class with [...] no virtual base classes
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data().Aggregate = false;
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}
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}
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if (Base->isVirtual()) {
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// Add this base if it's not already in the list.
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if (SeenVBaseTypes.insert(C.getCanonicalType(BaseType)).second)
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VBases.push_back(Base);
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// C++14 [meta.unary.prop] is_empty:
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// T is a class type, but not a union type, with ... no virtual base
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// classes
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data().Empty = false;
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// C++1z [dcl.init.agg]p1:
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// An aggregate is a class with [...] no virtual base classes
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data().Aggregate = false;
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// C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25:
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// A [default constructor, copy/move constructor, or copy/move assignment
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// operator for a class X] is trivial [...] if:
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// -- class X has [...] no virtual base classes
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data().HasTrivialSpecialMembers &= SMF_Destructor;
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data().HasTrivialSpecialMembersForCall &= SMF_Destructor;
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// C++0x [class]p7:
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// A standard-layout class is a class that: [...]
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// -- has [...] no virtual base classes
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data().IsStandardLayout = false;
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data().IsCXX11StandardLayout = false;
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// C++20 [dcl.constexpr]p3:
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// In the definition of a constexpr function [...]
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// -- if the function is a constructor or destructor,
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// its class shall not have any virtual base classes
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data().DefaultedDefaultConstructorIsConstexpr = false;
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data().DefaultedDestructorIsConstexpr = false;
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// C++1z [class.copy]p8:
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// The implicitly-declared copy constructor for a class X will have
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// the form 'X::X(const X&)' if each potentially constructed subobject
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// has a copy constructor whose first parameter is of type
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// 'const B&' or 'const volatile B&' [...]
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if (!BaseClassDecl->hasCopyConstructorWithConstParam())
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data().ImplicitCopyConstructorCanHaveConstParamForVBase = false;
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} else {
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// C++ [class.ctor]p5:
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// A default constructor is trivial [...] if:
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// -- all the direct base classes of its class have trivial default
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// constructors.
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if (!BaseClassDecl->hasTrivialDefaultConstructor())
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data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
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// C++0x [class.copy]p13:
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// A copy/move constructor for class X is trivial if [...]
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// [...]
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// -- the constructor selected to copy/move each direct base class
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// subobject is trivial, and
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if (!BaseClassDecl->hasTrivialCopyConstructor())
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data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;
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if (!BaseClassDecl->hasTrivialCopyConstructorForCall())
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data().HasTrivialSpecialMembersForCall &= ~SMF_CopyConstructor;
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// If the base class doesn't have a simple move constructor, we'll eagerly
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// declare it and perform overload resolution to determine which function
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// it actually calls. If it does have a simple move constructor, this
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// check is correct.
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if (!BaseClassDecl->hasTrivialMoveConstructor())
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data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;
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if (!BaseClassDecl->hasTrivialMoveConstructorForCall())
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data().HasTrivialSpecialMembersForCall &= ~SMF_MoveConstructor;
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// C++0x [class.copy]p27:
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// A copy/move assignment operator for class X is trivial if [...]
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// [...]
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// -- the assignment operator selected to copy/move each direct base
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// class subobject is trivial, and
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if (!BaseClassDecl->hasTrivialCopyAssignment())
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data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
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// If the base class doesn't have a simple move assignment, we'll eagerly
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// declare it and perform overload resolution to determine which function
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// it actually calls. If it does have a simple move assignment, this
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// check is correct.
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if (!BaseClassDecl->hasTrivialMoveAssignment())
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data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;
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// C++11 [class.ctor]p6:
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// If that user-written default constructor would satisfy the
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// requirements of a constexpr constructor, the implicitly-defined
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// default constructor is constexpr.
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if (!BaseClassDecl->hasConstexprDefaultConstructor())
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data().DefaultedDefaultConstructorIsConstexpr = false;
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// C++1z [class.copy]p8:
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// The implicitly-declared copy constructor for a class X will have
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// the form 'X::X(const X&)' if each potentially constructed subobject
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// has a copy constructor whose first parameter is of type
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// 'const B&' or 'const volatile B&' [...]
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if (!BaseClassDecl->hasCopyConstructorWithConstParam())
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data().ImplicitCopyConstructorCanHaveConstParamForNonVBase = false;
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}
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// C++ [class.ctor]p3:
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// A destructor is trivial if all the direct base classes of its class
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// have trivial destructors.
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if (!BaseClassDecl->hasTrivialDestructor())
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data().HasTrivialSpecialMembers &= ~SMF_Destructor;
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if (!BaseClassDecl->hasTrivialDestructorForCall())
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data().HasTrivialSpecialMembersForCall &= ~SMF_Destructor;
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if (!BaseClassDecl->hasIrrelevantDestructor())
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data().HasIrrelevantDestructor = false;
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// C++11 [class.copy]p18:
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// The implicitly-declared copy assignment operator for a class X will
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// have the form 'X& X::operator=(const X&)' if each direct base class B
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// of X has a copy assignment operator whose parameter is of type 'const
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// B&', 'const volatile B&', or 'B' [...]
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if (!BaseClassDecl->hasCopyAssignmentWithConstParam())
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data().ImplicitCopyAssignmentHasConstParam = false;
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// A class has an Objective-C object member if... or any of its bases
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// has an Objective-C object member.
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if (BaseClassDecl->hasObjectMember())
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setHasObjectMember(true);
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if (BaseClassDecl->hasVolatileMember())
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setHasVolatileMember(true);
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if (BaseClassDecl->getArgPassingRestrictions() ==
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RecordDecl::APK_CanNeverPassInRegs)
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setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs);
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// Keep track of the presence of mutable fields.
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if (BaseClassDecl->hasMutableFields())
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data().HasMutableFields = true;
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if (BaseClassDecl->hasUninitializedReferenceMember())
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data().HasUninitializedReferenceMember = true;
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if (!BaseClassDecl->allowConstDefaultInit())
|
|
data().HasUninitializedFields = true;
|
|
|
|
addedClassSubobject(BaseClassDecl);
|
|
}
|
|
|
|
// C++2a [class]p7:
|
|
// A class S is a standard-layout class if it:
|
|
// -- has at most one base class subobject of any given type
|
|
//
|
|
// Note that we only need to check this for classes with more than one base
|
|
// class. If there's only one base class, and it's standard layout, then
|
|
// we know there are no repeated base classes.
|
|
if (data().IsStandardLayout && NumBases > 1 && hasRepeatedBaseClass(this))
|
|
data().IsStandardLayout = false;
|
|
|
|
if (VBases.empty()) {
|
|
data().IsParsingBaseSpecifiers = false;
|
|
return;
|
|
}
|
|
|
|
// Create base specifier for any direct or indirect virtual bases.
|
|
data().VBases = new (C) CXXBaseSpecifier[VBases.size()];
|
|
data().NumVBases = VBases.size();
|
|
for (int I = 0, E = VBases.size(); I != E; ++I) {
|
|
QualType Type = VBases[I]->getType();
|
|
if (!Type->isDependentType())
|
|
addedClassSubobject(Type->getAsCXXRecordDecl());
|
|
data().getVBases()[I] = *VBases[I];
|
|
}
|
|
|
|
data().IsParsingBaseSpecifiers = false;
|
|
}
|
|
|
|
unsigned CXXRecordDecl::getODRHash() const {
|
|
assert(hasDefinition() && "ODRHash only for records with definitions");
|
|
|
|
// Previously calculated hash is stored in DefinitionData.
|
|
if (DefinitionData->HasODRHash)
|
|
return DefinitionData->ODRHash;
|
|
|
|
// Only calculate hash on first call of getODRHash per record.
|
|
ODRHash Hash;
|
|
Hash.AddCXXRecordDecl(getDefinition());
|
|
DefinitionData->HasODRHash = true;
|
|
DefinitionData->ODRHash = Hash.CalculateHash();
|
|
|
|
return DefinitionData->ODRHash;
|
|
}
|
|
|
|
void CXXRecordDecl::addedClassSubobject(CXXRecordDecl *Subobj) {
|
|
// C++11 [class.copy]p11:
|
|
// A defaulted copy/move constructor for a class X is defined as
|
|
// deleted if X has:
|
|
// -- a direct or virtual base class B that cannot be copied/moved [...]
|
|
// -- a non-static data member of class type M (or array thereof)
|
|
// that cannot be copied or moved [...]
|
|
if (!Subobj->hasSimpleCopyConstructor())
|
|
data().NeedOverloadResolutionForCopyConstructor = true;
|
|
if (!Subobj->hasSimpleMoveConstructor())
|
|
data().NeedOverloadResolutionForMoveConstructor = true;
|
|
|
|
// C++11 [class.copy]p23:
|
|
// A defaulted copy/move assignment operator for a class X is defined as
|
|
// deleted if X has:
|
|
// -- a direct or virtual base class B that cannot be copied/moved [...]
|
|
// -- a non-static data member of class type M (or array thereof)
|
|
// that cannot be copied or moved [...]
|
|
if (!Subobj->hasSimpleCopyAssignment())
|
|
data().NeedOverloadResolutionForCopyAssignment = true;
|
|
if (!Subobj->hasSimpleMoveAssignment())
|
|
data().NeedOverloadResolutionForMoveAssignment = true;
|
|
|
|
// C++11 [class.ctor]p5, C++11 [class.copy]p11, C++11 [class.dtor]p5:
|
|
// A defaulted [ctor or dtor] for a class X is defined as
|
|
// deleted if X has:
|
|
// -- any direct or virtual base class [...] has a type with a destructor
|
|
// that is deleted or inaccessible from the defaulted [ctor or dtor].
|
|
// -- any non-static data member has a type with a destructor
|
|
// that is deleted or inaccessible from the defaulted [ctor or dtor].
|
|
if (!Subobj->hasSimpleDestructor()) {
|
|
data().NeedOverloadResolutionForCopyConstructor = true;
|
|
data().NeedOverloadResolutionForMoveConstructor = true;
|
|
data().NeedOverloadResolutionForDestructor = true;
|
|
}
|
|
|
|
// C++2a [dcl.constexpr]p4:
|
|
// The definition of a constexpr destructor [shall] satisfy the
|
|
// following requirement:
|
|
// -- for every subobject of class type or (possibly multi-dimensional)
|
|
// array thereof, that class type shall have a constexpr destructor
|
|
if (!Subobj->hasConstexprDestructor())
|
|
data().DefaultedDestructorIsConstexpr = false;
|
|
|
|
// C++20 [temp.param]p7:
|
|
// A structural type is [...] a literal class type [for which] the types
|
|
// of all base classes and non-static data members are structural types or
|
|
// (possibly multi-dimensional) array thereof
|
|
if (!Subobj->data().StructuralIfLiteral)
|
|
data().StructuralIfLiteral = false;
|
|
}
|
|
|
|
bool CXXRecordDecl::hasConstexprDestructor() const {
|
|
auto *Dtor = getDestructor();
|
|
return Dtor ? Dtor->isConstexpr() : defaultedDestructorIsConstexpr();
|
|
}
|
|
|
|
bool CXXRecordDecl::hasAnyDependentBases() const {
|
|
if (!isDependentContext())
|
|
return false;
|
|
|
|
return !forallBases([](const CXXRecordDecl *) { return true; });
|
|
}
|
|
|
|
bool CXXRecordDecl::isTriviallyCopyable() const {
|
|
// C++0x [class]p5:
|
|
// A trivially copyable class is a class that:
|
|
// -- has no non-trivial copy constructors,
|
|
if (hasNonTrivialCopyConstructor()) return false;
|
|
// -- has no non-trivial move constructors,
|
|
if (hasNonTrivialMoveConstructor()) return false;
|
|
// -- has no non-trivial copy assignment operators,
|
|
if (hasNonTrivialCopyAssignment()) return false;
|
|
// -- has no non-trivial move assignment operators, and
|
|
if (hasNonTrivialMoveAssignment()) return false;
|
|
// -- has a trivial destructor.
|
|
if (!hasTrivialDestructor()) return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
void CXXRecordDecl::markedVirtualFunctionPure() {
|
|
// C++ [class.abstract]p2:
|
|
// A class is abstract if it has at least one pure virtual function.
|
|
data().Abstract = true;
|
|
}
|
|
|
|
bool CXXRecordDecl::hasSubobjectAtOffsetZeroOfEmptyBaseType(
|
|
ASTContext &Ctx, const CXXRecordDecl *XFirst) {
|
|
if (!getNumBases())
|
|
return false;
|
|
|
|
llvm::SmallPtrSet<const CXXRecordDecl*, 8> Bases;
|
|
llvm::SmallPtrSet<const CXXRecordDecl*, 8> M;
|
|
SmallVector<const CXXRecordDecl*, 8> WorkList;
|
|
|
|
// Visit a type that we have determined is an element of M(S).
|
|
auto Visit = [&](const CXXRecordDecl *RD) -> bool {
|
|
RD = RD->getCanonicalDecl();
|
|
|
|
// C++2a [class]p8:
|
|
// A class S is a standard-layout class if it [...] has no element of the
|
|
// set M(S) of types as a base class.
|
|
//
|
|
// If we find a subobject of an empty type, it might also be a base class,
|
|
// so we'll need to walk the base classes to check.
|
|
if (!RD->data().HasBasesWithFields) {
|
|
// Walk the bases the first time, stopping if we find the type. Build a
|
|
// set of them so we don't need to walk them again.
|
|
if (Bases.empty()) {
|
|
bool RDIsBase = !forallBases([&](const CXXRecordDecl *Base) -> bool {
|
|
Base = Base->getCanonicalDecl();
|
|
if (RD == Base)
|
|
return false;
|
|
Bases.insert(Base);
|
|
return true;
|
|
});
|
|
if (RDIsBase)
|
|
return true;
|
|
} else {
|
|
if (Bases.count(RD))
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (M.insert(RD).second)
|
|
WorkList.push_back(RD);
|
|
return false;
|
|
};
|
|
|
|
if (Visit(XFirst))
|
|
return true;
|
|
|
|
while (!WorkList.empty()) {
|
|
const CXXRecordDecl *X = WorkList.pop_back_val();
|
|
|
|
// FIXME: We don't check the bases of X. That matches the standard, but
|
|
// that sure looks like a wording bug.
|
|
|
|
// -- If X is a non-union class type with a non-static data member
|
|
// [recurse to each field] that is either of zero size or is the
|
|
// first non-static data member of X
|
|
// -- If X is a union type, [recurse to union members]
|
|
bool IsFirstField = true;
|
|
for (auto *FD : X->fields()) {
|
|
// FIXME: Should we really care about the type of the first non-static
|
|
// data member of a non-union if there are preceding unnamed bit-fields?
|
|
if (FD->isUnnamedBitfield())
|
|
continue;
|
|
|
|
if (!IsFirstField && !FD->isZeroSize(Ctx))
|
|
continue;
|
|
|
|
// -- If X is n array type, [visit the element type]
|
|
QualType T = Ctx.getBaseElementType(FD->getType());
|
|
if (auto *RD = T->getAsCXXRecordDecl())
|
|
if (Visit(RD))
|
|
return true;
|
|
|
|
if (!X->isUnion())
|
|
IsFirstField = false;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool CXXRecordDecl::lambdaIsDefaultConstructibleAndAssignable() const {
|
|
assert(isLambda() && "not a lambda");
|
|
|
|
// C++2a [expr.prim.lambda.capture]p11:
|
|
// The closure type associated with a lambda-expression has no default
|
|
// constructor if the lambda-expression has a lambda-capture and a
|
|
// defaulted default constructor otherwise. It has a deleted copy
|
|
// assignment operator if the lambda-expression has a lambda-capture and
|
|
// defaulted copy and move assignment operators otherwise.
|
|
//
|
|
// C++17 [expr.prim.lambda]p21:
|
|
// The closure type associated with a lambda-expression has no default
|
|
// constructor and a deleted copy assignment operator.
|
|
if (getLambdaCaptureDefault() != LCD_None || capture_size() != 0)
|
|
return false;
|
|
return getASTContext().getLangOpts().CPlusPlus20;
|
|
}
|
|
|
|
void CXXRecordDecl::addedMember(Decl *D) {
|
|
if (!D->isImplicit() &&
|
|
!isa<FieldDecl>(D) &&
|
|
!isa<IndirectFieldDecl>(D) &&
|
|
(!isa<TagDecl>(D) || cast<TagDecl>(D)->getTagKind() == TTK_Class ||
|
|
cast<TagDecl>(D)->getTagKind() == TTK_Interface))
|
|
data().HasOnlyCMembers = false;
|
|
|
|
// Ignore friends and invalid declarations.
|
|
if (D->getFriendObjectKind() || D->isInvalidDecl())
|
|
return;
|
|
|
|
auto *FunTmpl = dyn_cast<FunctionTemplateDecl>(D);
|
|
if (FunTmpl)
|
|
D = FunTmpl->getTemplatedDecl();
|
|
|
|
// FIXME: Pass NamedDecl* to addedMember?
|
|
Decl *DUnderlying = D;
|
|
if (auto *ND = dyn_cast<NamedDecl>(DUnderlying)) {
|
|
DUnderlying = ND->getUnderlyingDecl();
|
|
if (auto *UnderlyingFunTmpl = dyn_cast<FunctionTemplateDecl>(DUnderlying))
|
|
DUnderlying = UnderlyingFunTmpl->getTemplatedDecl();
|
|
}
|
|
|
|
if (const auto *Method = dyn_cast<CXXMethodDecl>(D)) {
|
|
if (Method->isVirtual()) {
|
|
// C++ [dcl.init.aggr]p1:
|
|
// An aggregate is an array or a class with [...] no virtual functions.
|
|
data().Aggregate = false;
|
|
|
|
// C++ [class]p4:
|
|
// A POD-struct is an aggregate class...
|
|
data().PlainOldData = false;
|
|
|
|
// C++14 [meta.unary.prop]p4:
|
|
// T is a class type [...] with [...] no virtual member functions...
|
|
data().Empty = false;
|
|
|
|
// C++ [class.virtual]p1:
|
|
// A class that declares or inherits a virtual function is called a
|
|
// polymorphic class.
|
|
data().Polymorphic = true;
|
|
|
|
// C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25:
|
|
// A [default constructor, copy/move constructor, or copy/move
|
|
// assignment operator for a class X] is trivial [...] if:
|
|
// -- class X has no virtual functions [...]
|
|
data().HasTrivialSpecialMembers &= SMF_Destructor;
|
|
data().HasTrivialSpecialMembersForCall &= SMF_Destructor;
|
|
|
|
// C++0x [class]p7:
|
|
// A standard-layout class is a class that: [...]
|
|
// -- has no virtual functions
|
|
data().IsStandardLayout = false;
|
|
data().IsCXX11StandardLayout = false;
|
|
}
|
|
}
|
|
|
|
// Notify the listener if an implicit member was added after the definition
|
|
// was completed.
|
|
if (!isBeingDefined() && D->isImplicit())
|
|
if (ASTMutationListener *L = getASTMutationListener())
|
|
L->AddedCXXImplicitMember(data().Definition, D);
|
|
|
|
// The kind of special member this declaration is, if any.
|
|
unsigned SMKind = 0;
|
|
|
|
// Handle constructors.
|
|
if (const auto *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
|
|
if (Constructor->isInheritingConstructor()) {
|
|
// Ignore constructor shadow declarations. They are lazily created and
|
|
// so shouldn't affect any properties of the class.
|
|
} else {
|
|
if (!Constructor->isImplicit()) {
|
|
// Note that we have a user-declared constructor.
|
|
data().UserDeclaredConstructor = true;
|
|
|
|
// C++ [class]p4:
|
|
// A POD-struct is an aggregate class [...]
|
|
// Since the POD bit is meant to be C++03 POD-ness, clear it even if
|
|
// the type is technically an aggregate in C++0x since it wouldn't be
|
|
// in 03.
|
|
data().PlainOldData = false;
|
|
}
|
|
|
|
if (Constructor->isDefaultConstructor()) {
|
|
SMKind |= SMF_DefaultConstructor;
|
|
|
|
if (Constructor->isUserProvided())
|
|
data().UserProvidedDefaultConstructor = true;
|
|
if (Constructor->isConstexpr())
|
|
data().HasConstexprDefaultConstructor = true;
|
|
if (Constructor->isDefaulted())
|
|
data().HasDefaultedDefaultConstructor = true;
|
|
}
|
|
|
|
if (!FunTmpl) {
|
|
unsigned Quals;
|
|
if (Constructor->isCopyConstructor(Quals)) {
|
|
SMKind |= SMF_CopyConstructor;
|
|
|
|
if (Quals & Qualifiers::Const)
|
|
data().HasDeclaredCopyConstructorWithConstParam = true;
|
|
} else if (Constructor->isMoveConstructor())
|
|
SMKind |= SMF_MoveConstructor;
|
|
}
|
|
|
|
// C++11 [dcl.init.aggr]p1: DR1518
|
|
// An aggregate is an array or a class with no user-provided [or]
|
|
// explicit [...] constructors
|
|
// C++20 [dcl.init.aggr]p1:
|
|
// An aggregate is an array or a class with no user-declared [...]
|
|
// constructors
|
|
if (getASTContext().getLangOpts().CPlusPlus20
|
|
? !Constructor->isImplicit()
|
|
: (Constructor->isUserProvided() || Constructor->isExplicit()))
|
|
data().Aggregate = false;
|
|
}
|
|
}
|
|
|
|
// Handle constructors, including those inherited from base classes.
|
|
if (const auto *Constructor = dyn_cast<CXXConstructorDecl>(DUnderlying)) {
|
|
// Record if we see any constexpr constructors which are neither copy
|
|
// nor move constructors.
|
|
// C++1z [basic.types]p10:
|
|
// [...] has at least one constexpr constructor or constructor template
|
|
// (possibly inherited from a base class) that is not a copy or move
|
|
// constructor [...]
|
|
if (Constructor->isConstexpr() && !Constructor->isCopyOrMoveConstructor())
|
|
data().HasConstexprNonCopyMoveConstructor = true;
|
|
}
|
|
|
|
// Handle destructors.
|
|
if (const auto *DD = dyn_cast<CXXDestructorDecl>(D)) {
|
|
SMKind |= SMF_Destructor;
|
|
|
|
if (DD->isUserProvided())
|
|
data().HasIrrelevantDestructor = false;
|
|
// If the destructor is explicitly defaulted and not trivial or not public
|
|
// or if the destructor is deleted, we clear HasIrrelevantDestructor in
|
|
// finishedDefaultedOrDeletedMember.
|
|
|
|
// C++11 [class.dtor]p5:
|
|
// A destructor is trivial if [...] the destructor is not virtual.
|
|
if (DD->isVirtual()) {
|
|
data().HasTrivialSpecialMembers &= ~SMF_Destructor;
|
|
data().HasTrivialSpecialMembersForCall &= ~SMF_Destructor;
|
|
}
|
|
}
|
|
|
|
// Handle member functions.
|
|
if (const auto *Method = dyn_cast<CXXMethodDecl>(D)) {
|
|
if (Method->isCopyAssignmentOperator()) {
|
|
SMKind |= SMF_CopyAssignment;
|
|
|
|
const auto *ParamTy =
|
|
Method->getParamDecl(0)->getType()->getAs<ReferenceType>();
|
|
if (!ParamTy || ParamTy->getPointeeType().isConstQualified())
|
|
data().HasDeclaredCopyAssignmentWithConstParam = true;
|
|
}
|
|
|
|
if (Method->isMoveAssignmentOperator())
|
|
SMKind |= SMF_MoveAssignment;
|
|
|
|
// Keep the list of conversion functions up-to-date.
|
|
if (auto *Conversion = dyn_cast<CXXConversionDecl>(D)) {
|
|
// FIXME: We use the 'unsafe' accessor for the access specifier here,
|
|
// because Sema may not have set it yet. That's really just a misdesign
|
|
// in Sema. However, LLDB *will* have set the access specifier correctly,
|
|
// and adds declarations after the class is technically completed,
|
|
// so completeDefinition()'s overriding of the access specifiers doesn't
|
|
// work.
|
|
AccessSpecifier AS = Conversion->getAccessUnsafe();
|
|
|
|
if (Conversion->getPrimaryTemplate()) {
|
|
// We don't record specializations.
|
|
} else {
|
|
ASTContext &Ctx = getASTContext();
|
|
ASTUnresolvedSet &Conversions = data().Conversions.get(Ctx);
|
|
NamedDecl *Primary =
|
|
FunTmpl ? cast<NamedDecl>(FunTmpl) : cast<NamedDecl>(Conversion);
|
|
if (Primary->getPreviousDecl())
|
|
Conversions.replace(cast<NamedDecl>(Primary->getPreviousDecl()),
|
|
Primary, AS);
|
|
else
|
|
Conversions.addDecl(Ctx, Primary, AS);
|
|
}
|
|
}
|
|
|
|
if (SMKind) {
|
|
// If this is the first declaration of a special member, we no longer have
|
|
// an implicit trivial special member.
|
|
data().HasTrivialSpecialMembers &=
|
|
data().DeclaredSpecialMembers | ~SMKind;
|
|
data().HasTrivialSpecialMembersForCall &=
|
|
data().DeclaredSpecialMembers | ~SMKind;
|
|
|
|
if (!Method->isImplicit() && !Method->isUserProvided()) {
|
|
// This method is user-declared but not user-provided. We can't work out
|
|
// whether it's trivial yet (not until we get to the end of the class).
|
|
// We'll handle this method in finishedDefaultedOrDeletedMember.
|
|
} else if (Method->isTrivial()) {
|
|
data().HasTrivialSpecialMembers |= SMKind;
|
|
data().HasTrivialSpecialMembersForCall |= SMKind;
|
|
} else if (Method->isTrivialForCall()) {
|
|
data().HasTrivialSpecialMembersForCall |= SMKind;
|
|
data().DeclaredNonTrivialSpecialMembers |= SMKind;
|
|
} else {
|
|
data().DeclaredNonTrivialSpecialMembers |= SMKind;
|
|
// If this is a user-provided function, do not set
|
|
// DeclaredNonTrivialSpecialMembersForCall here since we don't know
|
|
// yet whether the method would be considered non-trivial for the
|
|
// purpose of calls (attribute "trivial_abi" can be dropped from the
|
|
// class later, which can change the special method's triviality).
|
|
if (!Method->isUserProvided())
|
|
data().DeclaredNonTrivialSpecialMembersForCall |= SMKind;
|
|
}
|
|
|
|
// Note when we have declared a declared special member, and suppress the
|
|
// implicit declaration of this special member.
|
|
data().DeclaredSpecialMembers |= SMKind;
|
|
|
|
if (!Method->isImplicit()) {
|
|
data().UserDeclaredSpecialMembers |= SMKind;
|
|
|
|
// C++03 [class]p4:
|
|
// A POD-struct is an aggregate class that has [...] no user-defined
|
|
// copy assignment operator and no user-defined destructor.
|
|
//
|
|
// Since the POD bit is meant to be C++03 POD-ness, and in C++03,
|
|
// aggregates could not have any constructors, clear it even for an
|
|
// explicitly defaulted or deleted constructor.
|
|
// type is technically an aggregate in C++0x since it wouldn't be in 03.
|
|
//
|
|
// Also, a user-declared move assignment operator makes a class non-POD.
|
|
// This is an extension in C++03.
|
|
data().PlainOldData = false;
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
// Handle non-static data members.
|
|
if (const auto *Field = dyn_cast<FieldDecl>(D)) {
|
|
ASTContext &Context = getASTContext();
|
|
|
|
// C++2a [class]p7:
|
|
// A standard-layout class is a class that:
|
|
// [...]
|
|
// -- has all non-static data members and bit-fields in the class and
|
|
// its base classes first declared in the same class
|
|
if (data().HasBasesWithFields)
|
|
data().IsStandardLayout = false;
|
|
|
|
// C++ [class.bit]p2:
|
|
// A declaration for a bit-field that omits the identifier declares an
|
|
// unnamed bit-field. Unnamed bit-fields are not members and cannot be
|
|
// initialized.
|
|
if (Field->isUnnamedBitfield()) {
|
|
// C++ [meta.unary.prop]p4: [LWG2358]
|
|
// T is a class type [...] with [...] no unnamed bit-fields of non-zero
|
|
// length
|
|
if (data().Empty && !Field->isZeroLengthBitField(Context) &&
|
|
Context.getLangOpts().getClangABICompat() >
|
|
LangOptions::ClangABI::Ver6)
|
|
data().Empty = false;
|
|
return;
|
|
}
|
|
|
|
// C++11 [class]p7:
|
|
// A standard-layout class is a class that:
|
|
// -- either has no non-static data members in the most derived class
|
|
// [...] or has no base classes with non-static data members
|
|
if (data().HasBasesWithNonStaticDataMembers)
|
|
data().IsCXX11StandardLayout = false;
|
|
|
|
// C++ [dcl.init.aggr]p1:
|
|
// An aggregate is an array or a class (clause 9) with [...] no
|
|
// private or protected non-static data members (clause 11).
|
|
//
|
|
// A POD must be an aggregate.
|
|
if (D->getAccess() == AS_private || D->getAccess() == AS_protected) {
|
|
data().Aggregate = false;
|
|
data().PlainOldData = false;
|
|
|
|
// C++20 [temp.param]p7:
|
|
// A structural type is [...] a literal class type [for which] all
|
|
// non-static data members are public
|
|
data().StructuralIfLiteral = false;
|
|
}
|
|
|
|
// Track whether this is the first field. We use this when checking
|
|
// whether the class is standard-layout below.
|
|
bool IsFirstField = !data().HasPrivateFields &&
|
|
!data().HasProtectedFields && !data().HasPublicFields;
|
|
|
|
// C++0x [class]p7:
|
|
// A standard-layout class is a class that:
|
|
// [...]
|
|
// -- has the same access control for all non-static data members,
|
|
switch (D->getAccess()) {
|
|
case AS_private: data().HasPrivateFields = true; break;
|
|
case AS_protected: data().HasProtectedFields = true; break;
|
|
case AS_public: data().HasPublicFields = true; break;
|
|
case AS_none: llvm_unreachable("Invalid access specifier");
|
|
};
|
|
if ((data().HasPrivateFields + data().HasProtectedFields +
|
|
data().HasPublicFields) > 1) {
|
|
data().IsStandardLayout = false;
|
|
data().IsCXX11StandardLayout = false;
|
|
}
|
|
|
|
// Keep track of the presence of mutable fields.
|
|
if (Field->isMutable()) {
|
|
data().HasMutableFields = true;
|
|
|
|
// C++20 [temp.param]p7:
|
|
// A structural type is [...] a literal class type [for which] all
|
|
// non-static data members are public
|
|
data().StructuralIfLiteral = false;
|
|
}
|
|
|
|
// C++11 [class.union]p8, DR1460:
|
|
// If X is a union, a non-static data member of X that is not an anonymous
|
|
// union is a variant member of X.
|
|
if (isUnion() && !Field->isAnonymousStructOrUnion())
|
|
data().HasVariantMembers = true;
|
|
|
|
// C++0x [class]p9:
|
|
// A POD struct is a class that is both a trivial class and a
|
|
// standard-layout class, and has no non-static data members of type
|
|
// non-POD struct, non-POD union (or array of such types).
|
|
//
|
|
// Automatic Reference Counting: the presence of a member of Objective-C pointer type
|
|
// that does not explicitly have no lifetime makes the class a non-POD.
|
|
QualType T = Context.getBaseElementType(Field->getType());
|
|
if (T->isObjCRetainableType() || T.isObjCGCStrong()) {
|
|
if (T.hasNonTrivialObjCLifetime()) {
|
|
// Objective-C Automatic Reference Counting:
|
|
// If a class has a non-static data member of Objective-C pointer
|
|
// type (or array thereof), it is a non-POD type and its
|
|
// default constructor (if any), copy constructor, move constructor,
|
|
// copy assignment operator, move assignment operator, and destructor are
|
|
// non-trivial.
|
|
setHasObjectMember(true);
|
|
struct DefinitionData &Data = data();
|
|
Data.PlainOldData = false;
|
|
Data.HasTrivialSpecialMembers = 0;
|
|
|
|
// __strong or __weak fields do not make special functions non-trivial
|
|
// for the purpose of calls.
|
|
Qualifiers::ObjCLifetime LT = T.getQualifiers().getObjCLifetime();
|
|
if (LT != Qualifiers::OCL_Strong && LT != Qualifiers::OCL_Weak)
|
|
data().HasTrivialSpecialMembersForCall = 0;
|
|
|
|
// Structs with __weak fields should never be passed directly.
|
|
if (LT == Qualifiers::OCL_Weak)
|
|
setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs);
|
|
|
|
Data.HasIrrelevantDestructor = false;
|
|
|
|
if (isUnion()) {
|
|
data().DefaultedCopyConstructorIsDeleted = true;
|
|
data().DefaultedMoveConstructorIsDeleted = true;
|
|
data().DefaultedCopyAssignmentIsDeleted = true;
|
|
data().DefaultedMoveAssignmentIsDeleted = true;
|
|
data().DefaultedDestructorIsDeleted = true;
|
|
data().NeedOverloadResolutionForCopyConstructor = true;
|
|
data().NeedOverloadResolutionForMoveConstructor = true;
|
|
data().NeedOverloadResolutionForCopyAssignment = true;
|
|
data().NeedOverloadResolutionForMoveAssignment = true;
|
|
data().NeedOverloadResolutionForDestructor = true;
|
|
}
|
|
} else if (!Context.getLangOpts().ObjCAutoRefCount) {
|
|
setHasObjectMember(true);
|
|
}
|
|
} else if (!T.isCXX98PODType(Context))
|
|
data().PlainOldData = false;
|
|
|
|
if (T->isReferenceType()) {
|
|
if (!Field->hasInClassInitializer())
|
|
data().HasUninitializedReferenceMember = true;
|
|
|
|
// C++0x [class]p7:
|
|
// A standard-layout class is a class that:
|
|
// -- has no non-static data members of type [...] reference,
|
|
data().IsStandardLayout = false;
|
|
data().IsCXX11StandardLayout = false;
|
|
|
|
// C++1z [class.copy.ctor]p10:
|
|
// A defaulted copy constructor for a class X is defined as deleted if X has:
|
|
// -- a non-static data member of rvalue reference type
|
|
if (T->isRValueReferenceType())
|
|
data().DefaultedCopyConstructorIsDeleted = true;
|
|
}
|
|
|
|
if (!Field->hasInClassInitializer() && !Field->isMutable()) {
|
|
if (CXXRecordDecl *FieldType = T->getAsCXXRecordDecl()) {
|
|
if (FieldType->hasDefinition() && !FieldType->allowConstDefaultInit())
|
|
data().HasUninitializedFields = true;
|
|
} else {
|
|
data().HasUninitializedFields = true;
|
|
}
|
|
}
|
|
|
|
// Record if this field is the first non-literal or volatile field or base.
|
|
if (!T->isLiteralType(Context) || T.isVolatileQualified())
|
|
data().HasNonLiteralTypeFieldsOrBases = true;
|
|
|
|
if (Field->hasInClassInitializer() ||
|
|
(Field->isAnonymousStructOrUnion() &&
|
|
Field->getType()->getAsCXXRecordDecl()->hasInClassInitializer())) {
|
|
data().HasInClassInitializer = true;
|
|
|
|
// C++11 [class]p5:
|
|
// A default constructor is trivial if [...] no non-static data member
|
|
// of its class has a brace-or-equal-initializer.
|
|
data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
|
|
|
|
// C++11 [dcl.init.aggr]p1:
|
|
// An aggregate is a [...] class with [...] no
|
|
// brace-or-equal-initializers for non-static data members.
|
|
//
|
|
// This rule was removed in C++14.
|
|
if (!getASTContext().getLangOpts().CPlusPlus14)
|
|
data().Aggregate = false;
|
|
|
|
// C++11 [class]p10:
|
|
// A POD struct is [...] a trivial class.
|
|
data().PlainOldData = false;
|
|
}
|
|
|
|
// C++11 [class.copy]p23:
|
|
// A defaulted copy/move assignment operator for a class X is defined
|
|
// as deleted if X has:
|
|
// -- a non-static data member of reference type
|
|
if (T->isReferenceType()) {
|
|
data().DefaultedCopyAssignmentIsDeleted = true;
|
|
data().DefaultedMoveAssignmentIsDeleted = true;
|
|
}
|
|
|
|
// Bitfields of length 0 are also zero-sized, but we already bailed out for
|
|
// those because they are always unnamed.
|
|
bool IsZeroSize = Field->isZeroSize(Context);
|
|
|
|
if (const auto *RecordTy = T->getAs<RecordType>()) {
|
|
auto *FieldRec = cast<CXXRecordDecl>(RecordTy->getDecl());
|
|
if (FieldRec->getDefinition()) {
|
|
addedClassSubobject(FieldRec);
|
|
|
|
// We may need to perform overload resolution to determine whether a
|
|
// field can be moved if it's const or volatile qualified.
|
|
if (T.getCVRQualifiers() & (Qualifiers::Const | Qualifiers::Volatile)) {
|
|
// We need to care about 'const' for the copy constructor because an
|
|
// implicit copy constructor might be declared with a non-const
|
|
// parameter.
|
|
data().NeedOverloadResolutionForCopyConstructor = true;
|
|
data().NeedOverloadResolutionForMoveConstructor = true;
|
|
data().NeedOverloadResolutionForCopyAssignment = true;
|
|
data().NeedOverloadResolutionForMoveAssignment = true;
|
|
}
|
|
|
|
// C++11 [class.ctor]p5, C++11 [class.copy]p11:
|
|
// A defaulted [special member] for a class X is defined as
|
|
// deleted if:
|
|
// -- X is a union-like class that has a variant member with a
|
|
// non-trivial [corresponding special member]
|
|
if (isUnion()) {
|
|
if (FieldRec->hasNonTrivialCopyConstructor())
|
|
data().DefaultedCopyConstructorIsDeleted = true;
|
|
if (FieldRec->hasNonTrivialMoveConstructor())
|
|
data().DefaultedMoveConstructorIsDeleted = true;
|
|
if (FieldRec->hasNonTrivialCopyAssignment())
|
|
data().DefaultedCopyAssignmentIsDeleted = true;
|
|
if (FieldRec->hasNonTrivialMoveAssignment())
|
|
data().DefaultedMoveAssignmentIsDeleted = true;
|
|
if (FieldRec->hasNonTrivialDestructor())
|
|
data().DefaultedDestructorIsDeleted = true;
|
|
}
|
|
|
|
// For an anonymous union member, our overload resolution will perform
|
|
// overload resolution for its members.
|
|
if (Field->isAnonymousStructOrUnion()) {
|
|
data().NeedOverloadResolutionForCopyConstructor |=
|
|
FieldRec->data().NeedOverloadResolutionForCopyConstructor;
|
|
data().NeedOverloadResolutionForMoveConstructor |=
|
|
FieldRec->data().NeedOverloadResolutionForMoveConstructor;
|
|
data().NeedOverloadResolutionForCopyAssignment |=
|
|
FieldRec->data().NeedOverloadResolutionForCopyAssignment;
|
|
data().NeedOverloadResolutionForMoveAssignment |=
|
|
FieldRec->data().NeedOverloadResolutionForMoveAssignment;
|
|
data().NeedOverloadResolutionForDestructor |=
|
|
FieldRec->data().NeedOverloadResolutionForDestructor;
|
|
}
|
|
|
|
// C++0x [class.ctor]p5:
|
|
// A default constructor is trivial [...] if:
|
|
// -- for all the non-static data members of its class that are of
|
|
// class type (or array thereof), each such class has a trivial
|
|
// default constructor.
|
|
if (!FieldRec->hasTrivialDefaultConstructor())
|
|
data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;
|
|
|
|
// C++0x [class.copy]p13:
|
|
// A copy/move constructor for class X is trivial if [...]
|
|
// [...]
|
|
// -- for each non-static data member of X that is of class type (or
|
|
// an array thereof), the constructor selected to copy/move that
|
|
// member is trivial;
|
|
if (!FieldRec->hasTrivialCopyConstructor())
|
|
data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;
|
|
|
|
if (!FieldRec->hasTrivialCopyConstructorForCall())
|
|
data().HasTrivialSpecialMembersForCall &= ~SMF_CopyConstructor;
|
|
|
|
// If the field doesn't have a simple move constructor, we'll eagerly
|
|
// declare the move constructor for this class and we'll decide whether
|
|
// it's trivial then.
|
|
if (!FieldRec->hasTrivialMoveConstructor())
|
|
data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;
|
|
|
|
if (!FieldRec->hasTrivialMoveConstructorForCall())
|
|
data().HasTrivialSpecialMembersForCall &= ~SMF_MoveConstructor;
|
|
|
|
// C++0x [class.copy]p27:
|
|
// A copy/move assignment operator for class X is trivial if [...]
|
|
// [...]
|
|
// -- for each non-static data member of X that is of class type (or
|
|
// an array thereof), the assignment operator selected to
|
|
// copy/move that member is trivial;
|
|
if (!FieldRec->hasTrivialCopyAssignment())
|
|
data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
|
|
// If the field doesn't have a simple move assignment, we'll eagerly
|
|
// declare the move assignment for this class and we'll decide whether
|
|
// it's trivial then.
|
|
if (!FieldRec->hasTrivialMoveAssignment())
|
|
data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;
|
|
|
|
if (!FieldRec->hasTrivialDestructor())
|
|
data().HasTrivialSpecialMembers &= ~SMF_Destructor;
|
|
if (!FieldRec->hasTrivialDestructorForCall())
|
|
data().HasTrivialSpecialMembersForCall &= ~SMF_Destructor;
|
|
if (!FieldRec->hasIrrelevantDestructor())
|
|
data().HasIrrelevantDestructor = false;
|
|
if (FieldRec->hasObjectMember())
|
|
setHasObjectMember(true);
|
|
if (FieldRec->hasVolatileMember())
|
|
setHasVolatileMember(true);
|
|
if (FieldRec->getArgPassingRestrictions() ==
|
|
RecordDecl::APK_CanNeverPassInRegs)
|
|
setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs);
|
|
|
|
// C++0x [class]p7:
|
|
// A standard-layout class is a class that:
|
|
// -- has no non-static data members of type non-standard-layout
|
|
// class (or array of such types) [...]
|
|
if (!FieldRec->isStandardLayout())
|
|
data().IsStandardLayout = false;
|
|
if (!FieldRec->isCXX11StandardLayout())
|
|
data().IsCXX11StandardLayout = false;
|
|
|
|
// C++2a [class]p7:
|
|
// A standard-layout class is a class that:
|
|
// [...]
|
|
// -- has no element of the set M(S) of types as a base class.
|
|
if (data().IsStandardLayout &&
|
|
(isUnion() || IsFirstField || IsZeroSize) &&
|
|
hasSubobjectAtOffsetZeroOfEmptyBaseType(Context, FieldRec))
|
|
data().IsStandardLayout = false;
|
|
|
|
// C++11 [class]p7:
|
|
// A standard-layout class is a class that:
|
|
// -- has no base classes of the same type as the first non-static
|
|
// data member
|
|
if (data().IsCXX11StandardLayout && IsFirstField) {
|
|
// FIXME: We should check all base classes here, not just direct
|
|
// base classes.
|
|
for (const auto &BI : bases()) {
|
|
if (Context.hasSameUnqualifiedType(BI.getType(), T)) {
|
|
data().IsCXX11StandardLayout = false;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Keep track of the presence of mutable fields.
|
|
if (FieldRec->hasMutableFields())
|
|
data().HasMutableFields = true;
|
|
|
|
if (Field->isMutable()) {
|
|
// Our copy constructor/assignment might call something other than
|
|
// the subobject's copy constructor/assignment if it's mutable and of
|
|
// class type.
|
|
data().NeedOverloadResolutionForCopyConstructor = true;
|
|
data().NeedOverloadResolutionForCopyAssignment = true;
|
|
}
|
|
|
|
// C++11 [class.copy]p13:
|
|
// If the implicitly-defined constructor would satisfy the
|
|
// requirements of a constexpr constructor, the implicitly-defined
|
|
// constructor is constexpr.
|
|
// C++11 [dcl.constexpr]p4:
|
|
// -- every constructor involved in initializing non-static data
|
|
// members [...] shall be a constexpr constructor
|
|
if (!Field->hasInClassInitializer() &&
|
|
!FieldRec->hasConstexprDefaultConstructor() && !isUnion())
|
|
// The standard requires any in-class initializer to be a constant
|
|
// expression. We consider this to be a defect.
|
|
data().DefaultedDefaultConstructorIsConstexpr = false;
|
|
|
|
// C++11 [class.copy]p8:
|
|
// The implicitly-declared copy constructor for a class X will have
|
|
// the form 'X::X(const X&)' if each potentially constructed subobject
|
|
// of a class type M (or array thereof) has a copy constructor whose
|
|
// first parameter is of type 'const M&' or 'const volatile M&'.
|
|
if (!FieldRec->hasCopyConstructorWithConstParam())
|
|
data().ImplicitCopyConstructorCanHaveConstParamForNonVBase = false;
|
|
|
|
// C++11 [class.copy]p18:
|
|
// The implicitly-declared copy assignment oeprator for a class X will
|
|
// have the form 'X& X::operator=(const X&)' if [...] for all the
|
|
// non-static data members of X that are of a class type M (or array
|
|
// thereof), each such class type has a copy assignment operator whose
|
|
// parameter is of type 'const M&', 'const volatile M&' or 'M'.
|
|
if (!FieldRec->hasCopyAssignmentWithConstParam())
|
|
data().ImplicitCopyAssignmentHasConstParam = false;
|
|
|
|
if (FieldRec->hasUninitializedReferenceMember() &&
|
|
!Field->hasInClassInitializer())
|
|
data().HasUninitializedReferenceMember = true;
|
|
|
|
// C++11 [class.union]p8, DR1460:
|
|
// a non-static data member of an anonymous union that is a member of
|
|
// X is also a variant member of X.
|
|
if (FieldRec->hasVariantMembers() &&
|
|
Field->isAnonymousStructOrUnion())
|
|
data().HasVariantMembers = true;
|
|
}
|
|
} else {
|
|
// Base element type of field is a non-class type.
|
|
if (!T->isLiteralType(Context) ||
|
|
(!Field->hasInClassInitializer() && !isUnion() &&
|
|
!Context.getLangOpts().CPlusPlus20))
|
|
data().DefaultedDefaultConstructorIsConstexpr = false;
|
|
|
|
// C++11 [class.copy]p23:
|
|
// A defaulted copy/move assignment operator for a class X is defined
|
|
// as deleted if X has:
|
|
// -- a non-static data member of const non-class type (or array
|
|
// thereof)
|
|
if (T.isConstQualified()) {
|
|
data().DefaultedCopyAssignmentIsDeleted = true;
|
|
data().DefaultedMoveAssignmentIsDeleted = true;
|
|
}
|
|
|
|
// C++20 [temp.param]p7:
|
|
// A structural type is [...] a literal class type [for which] the
|
|
// types of all non-static data members are structural types or
|
|
// (possibly multidimensional) array thereof
|
|
// We deal with class types elsewhere.
|
|
if (!T->isStructuralType())
|
|
data().StructuralIfLiteral = false;
|
|
}
|
|
|
|
// C++14 [meta.unary.prop]p4:
|
|
// T is a class type [...] with [...] no non-static data members other
|
|
// than subobjects of zero size
|
|
if (data().Empty && !IsZeroSize)
|
|
data().Empty = false;
|
|
}
|
|
|
|
// Handle using declarations of conversion functions.
|
|
if (auto *Shadow = dyn_cast<UsingShadowDecl>(D)) {
|
|
if (Shadow->getDeclName().getNameKind()
|
|
== DeclarationName::CXXConversionFunctionName) {
|
|
ASTContext &Ctx = getASTContext();
|
|
data().Conversions.get(Ctx).addDecl(Ctx, Shadow, Shadow->getAccess());
|
|
}
|
|
}
|
|
|
|
if (const auto *Using = dyn_cast<UsingDecl>(D)) {
|
|
if (Using->getDeclName().getNameKind() ==
|
|
DeclarationName::CXXConstructorName) {
|
|
data().HasInheritedConstructor = true;
|
|
// C++1z [dcl.init.aggr]p1:
|
|
// An aggregate is [...] a class [...] with no inherited constructors
|
|
data().Aggregate = false;
|
|
}
|
|
|
|
if (Using->getDeclName().getCXXOverloadedOperator() == OO_Equal)
|
|
data().HasInheritedAssignment = true;
|
|
}
|
|
}
|
|
|
|
void CXXRecordDecl::finishedDefaultedOrDeletedMember(CXXMethodDecl *D) {
|
|
assert(!D->isImplicit() && !D->isUserProvided());
|
|
|
|
// The kind of special member this declaration is, if any.
|
|
unsigned SMKind = 0;
|
|
|
|
if (const auto *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
|
|
if (Constructor->isDefaultConstructor()) {
|
|
SMKind |= SMF_DefaultConstructor;
|
|
if (Constructor->isConstexpr())
|
|
data().HasConstexprDefaultConstructor = true;
|
|
}
|
|
if (Constructor->isCopyConstructor())
|
|
SMKind |= SMF_CopyConstructor;
|
|
else if (Constructor->isMoveConstructor())
|
|
SMKind |= SMF_MoveConstructor;
|
|
else if (Constructor->isConstexpr())
|
|
// We may now know that the constructor is constexpr.
|
|
data().HasConstexprNonCopyMoveConstructor = true;
|
|
} else if (isa<CXXDestructorDecl>(D)) {
|
|
SMKind |= SMF_Destructor;
|
|
if (!D->isTrivial() || D->getAccess() != AS_public || D->isDeleted())
|
|
data().HasIrrelevantDestructor = false;
|
|
} else if (D->isCopyAssignmentOperator())
|
|
SMKind |= SMF_CopyAssignment;
|
|
else if (D->isMoveAssignmentOperator())
|
|
SMKind |= SMF_MoveAssignment;
|
|
|
|
// Update which trivial / non-trivial special members we have.
|
|
// addedMember will have skipped this step for this member.
|
|
if (D->isTrivial())
|
|
data().HasTrivialSpecialMembers |= SMKind;
|
|
else
|
|
data().DeclaredNonTrivialSpecialMembers |= SMKind;
|
|
}
|
|
|
|
void CXXRecordDecl::setCaptures(ASTContext &Context,
|
|
ArrayRef<LambdaCapture> Captures) {
|
|
CXXRecordDecl::LambdaDefinitionData &Data = getLambdaData();
|
|
|
|
// Copy captures.
|
|
Data.NumCaptures = Captures.size();
|
|
Data.NumExplicitCaptures = 0;
|
|
Data.Captures = (LambdaCapture *)Context.Allocate(sizeof(LambdaCapture) *
|
|
Captures.size());
|
|
LambdaCapture *ToCapture = Data.Captures;
|
|
for (unsigned I = 0, N = Captures.size(); I != N; ++I) {
|
|
if (Captures[I].isExplicit())
|
|
++Data.NumExplicitCaptures;
|
|
|
|
*ToCapture++ = Captures[I];
|
|
}
|
|
|
|
if (!lambdaIsDefaultConstructibleAndAssignable())
|
|
Data.DefaultedCopyAssignmentIsDeleted = true;
|
|
}
|
|
|
|
void CXXRecordDecl::setTrivialForCallFlags(CXXMethodDecl *D) {
|
|
unsigned SMKind = 0;
|
|
|
|
if (const auto *Constructor = dyn_cast<CXXConstructorDecl>(D)) {
|
|
if (Constructor->isCopyConstructor())
|
|
SMKind = SMF_CopyConstructor;
|
|
else if (Constructor->isMoveConstructor())
|
|
SMKind = SMF_MoveConstructor;
|
|
} else if (isa<CXXDestructorDecl>(D))
|
|
SMKind = SMF_Destructor;
|
|
|
|
if (D->isTrivialForCall())
|
|
data().HasTrivialSpecialMembersForCall |= SMKind;
|
|
else
|
|
data().DeclaredNonTrivialSpecialMembersForCall |= SMKind;
|
|
}
|
|
|
|
bool CXXRecordDecl::isCLike() const {
|
|
if (getTagKind() == TTK_Class || getTagKind() == TTK_Interface ||
|
|
!TemplateOrInstantiation.isNull())
|
|
return false;
|
|
if (!hasDefinition())
|
|
return true;
|
|
|
|
return isPOD() && data().HasOnlyCMembers;
|
|
}
|
|
|
|
bool CXXRecordDecl::isGenericLambda() const {
|
|
if (!isLambda()) return false;
|
|
return getLambdaData().IsGenericLambda;
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
static bool allLookupResultsAreTheSame(const DeclContext::lookup_result &R) {
|
|
for (auto *D : R)
|
|
if (!declaresSameEntity(D, R.front()))
|
|
return false;
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
static NamedDecl* getLambdaCallOperatorHelper(const CXXRecordDecl &RD) {
|
|
if (!RD.isLambda()) return nullptr;
|
|
DeclarationName Name =
|
|
RD.getASTContext().DeclarationNames.getCXXOperatorName(OO_Call);
|
|
DeclContext::lookup_result Calls = RD.lookup(Name);
|
|
|
|
assert(!Calls.empty() && "Missing lambda call operator!");
|
|
assert(allLookupResultsAreTheSame(Calls) &&
|
|
"More than one lambda call operator!");
|
|
return Calls.front();
|
|
}
|
|
|
|
FunctionTemplateDecl* CXXRecordDecl::getDependentLambdaCallOperator() const {
|
|
NamedDecl *CallOp = getLambdaCallOperatorHelper(*this);
|
|
return dyn_cast_or_null<FunctionTemplateDecl>(CallOp);
|
|
}
|
|
|
|
CXXMethodDecl *CXXRecordDecl::getLambdaCallOperator() const {
|
|
NamedDecl *CallOp = getLambdaCallOperatorHelper(*this);
|
|
|
|
if (CallOp == nullptr)
|
|
return nullptr;
|
|
|
|
if (const auto *CallOpTmpl = dyn_cast<FunctionTemplateDecl>(CallOp))
|
|
return cast<CXXMethodDecl>(CallOpTmpl->getTemplatedDecl());
|
|
|
|
return cast<CXXMethodDecl>(CallOp);
|
|
}
|
|
|
|
CXXMethodDecl* CXXRecordDecl::getLambdaStaticInvoker() const {
|
|
CXXMethodDecl *CallOp = getLambdaCallOperator();
|
|
CallingConv CC = CallOp->getType()->castAs<FunctionType>()->getCallConv();
|
|
return getLambdaStaticInvoker(CC);
|
|
}
|
|
|
|
static DeclContext::lookup_result
|
|
getLambdaStaticInvokers(const CXXRecordDecl &RD) {
|
|
assert(RD.isLambda() && "Must be a lambda");
|
|
DeclarationName Name =
|
|
&RD.getASTContext().Idents.get(getLambdaStaticInvokerName());
|
|
return RD.lookup(Name);
|
|
}
|
|
|
|
static CXXMethodDecl *getInvokerAsMethod(NamedDecl *ND) {
|
|
if (const auto *InvokerTemplate = dyn_cast<FunctionTemplateDecl>(ND))
|
|
return cast<CXXMethodDecl>(InvokerTemplate->getTemplatedDecl());
|
|
return cast<CXXMethodDecl>(ND);
|
|
}
|
|
|
|
CXXMethodDecl *CXXRecordDecl::getLambdaStaticInvoker(CallingConv CC) const {
|
|
if (!isLambda())
|
|
return nullptr;
|
|
DeclContext::lookup_result Invoker = getLambdaStaticInvokers(*this);
|
|
|
|
for (NamedDecl *ND : Invoker) {
|
|
const auto *FTy =
|
|
cast<ValueDecl>(ND->getAsFunction())->getType()->castAs<FunctionType>();
|
|
if (FTy->getCallConv() == CC)
|
|
return getInvokerAsMethod(ND);
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
void CXXRecordDecl::getCaptureFields(
|
|
llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures,
|
|
FieldDecl *&ThisCapture) const {
|
|
Captures.clear();
|
|
ThisCapture = nullptr;
|
|
|
|
LambdaDefinitionData &Lambda = getLambdaData();
|
|
RecordDecl::field_iterator Field = field_begin();
|
|
for (const LambdaCapture *C = Lambda.Captures, *CEnd = C + Lambda.NumCaptures;
|
|
C != CEnd; ++C, ++Field) {
|
|
if (C->capturesThis())
|
|
ThisCapture = *Field;
|
|
else if (C->capturesVariable())
|
|
Captures[C->getCapturedVar()] = *Field;
|
|
}
|
|
assert(Field == field_end());
|
|
}
|
|
|
|
TemplateParameterList *
|
|
CXXRecordDecl::getGenericLambdaTemplateParameterList() const {
|
|
if (!isGenericLambda()) return nullptr;
|
|
CXXMethodDecl *CallOp = getLambdaCallOperator();
|
|
if (FunctionTemplateDecl *Tmpl = CallOp->getDescribedFunctionTemplate())
|
|
return Tmpl->getTemplateParameters();
|
|
return nullptr;
|
|
}
|
|
|
|
ArrayRef<NamedDecl *>
|
|
CXXRecordDecl::getLambdaExplicitTemplateParameters() const {
|
|
TemplateParameterList *List = getGenericLambdaTemplateParameterList();
|
|
if (!List)
|
|
return {};
|
|
|
|
assert(std::is_partitioned(List->begin(), List->end(),
|
|
[](const NamedDecl *D) { return !D->isImplicit(); })
|
|
&& "Explicit template params should be ordered before implicit ones");
|
|
|
|
const auto ExplicitEnd = llvm::partition_point(
|
|
*List, [](const NamedDecl *D) { return !D->isImplicit(); });
|
|
return llvm::makeArrayRef(List->begin(), ExplicitEnd);
|
|
}
|
|
|
|
Decl *CXXRecordDecl::getLambdaContextDecl() const {
|
|
assert(isLambda() && "Not a lambda closure type!");
|
|
ExternalASTSource *Source = getParentASTContext().getExternalSource();
|
|
return getLambdaData().ContextDecl.get(Source);
|
|
}
|
|
|
|
static CanQualType GetConversionType(ASTContext &Context, NamedDecl *Conv) {
|
|
QualType T =
|
|
cast<CXXConversionDecl>(Conv->getUnderlyingDecl()->getAsFunction())
|
|
->getConversionType();
|
|
return Context.getCanonicalType(T);
|
|
}
|
|
|
|
/// Collect the visible conversions of a base class.
|
|
///
|
|
/// \param Record a base class of the class we're considering
|
|
/// \param InVirtual whether this base class is a virtual base (or a base
|
|
/// of a virtual base)
|
|
/// \param Access the access along the inheritance path to this base
|
|
/// \param ParentHiddenTypes the conversions provided by the inheritors
|
|
/// of this base
|
|
/// \param Output the set to which to add conversions from non-virtual bases
|
|
/// \param VOutput the set to which to add conversions from virtual bases
|
|
/// \param HiddenVBaseCs the set of conversions which were hidden in a
|
|
/// virtual base along some inheritance path
|
|
static void CollectVisibleConversions(
|
|
ASTContext &Context, const CXXRecordDecl *Record, bool InVirtual,
|
|
AccessSpecifier Access,
|
|
const llvm::SmallPtrSet<CanQualType, 8> &ParentHiddenTypes,
|
|
ASTUnresolvedSet &Output, UnresolvedSetImpl &VOutput,
|
|
llvm::SmallPtrSet<NamedDecl *, 8> &HiddenVBaseCs) {
|
|
// The set of types which have conversions in this class or its
|
|
// subclasses. As an optimization, we don't copy the derived set
|
|
// unless it might change.
|
|
const llvm::SmallPtrSet<CanQualType, 8> *HiddenTypes = &ParentHiddenTypes;
|
|
llvm::SmallPtrSet<CanQualType, 8> HiddenTypesBuffer;
|
|
|
|
// Collect the direct conversions and figure out which conversions
|
|
// will be hidden in the subclasses.
|
|
CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
|
|
CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
|
|
if (ConvI != ConvE) {
|
|
HiddenTypesBuffer = ParentHiddenTypes;
|
|
HiddenTypes = &HiddenTypesBuffer;
|
|
|
|
for (CXXRecordDecl::conversion_iterator I = ConvI; I != ConvE; ++I) {
|
|
CanQualType ConvType(GetConversionType(Context, I.getDecl()));
|
|
bool Hidden = ParentHiddenTypes.count(ConvType);
|
|
if (!Hidden)
|
|
HiddenTypesBuffer.insert(ConvType);
|
|
|
|
// If this conversion is hidden and we're in a virtual base,
|
|
// remember that it's hidden along some inheritance path.
|
|
if (Hidden && InVirtual)
|
|
HiddenVBaseCs.insert(cast<NamedDecl>(I.getDecl()->getCanonicalDecl()));
|
|
|
|
// If this conversion isn't hidden, add it to the appropriate output.
|
|
else if (!Hidden) {
|
|
AccessSpecifier IAccess
|
|
= CXXRecordDecl::MergeAccess(Access, I.getAccess());
|
|
|
|
if (InVirtual)
|
|
VOutput.addDecl(I.getDecl(), IAccess);
|
|
else
|
|
Output.addDecl(Context, I.getDecl(), IAccess);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Collect information recursively from any base classes.
|
|
for (const auto &I : Record->bases()) {
|
|
const auto *RT = I.getType()->getAs<RecordType>();
|
|
if (!RT) continue;
|
|
|
|
AccessSpecifier BaseAccess
|
|
= CXXRecordDecl::MergeAccess(Access, I.getAccessSpecifier());
|
|
bool BaseInVirtual = InVirtual || I.isVirtual();
|
|
|
|
auto *Base = cast<CXXRecordDecl>(RT->getDecl());
|
|
CollectVisibleConversions(Context, Base, BaseInVirtual, BaseAccess,
|
|
*HiddenTypes, Output, VOutput, HiddenVBaseCs);
|
|
}
|
|
}
|
|
|
|
/// Collect the visible conversions of a class.
|
|
///
|
|
/// This would be extremely straightforward if it weren't for virtual
|
|
/// bases. It might be worth special-casing that, really.
|
|
static void CollectVisibleConversions(ASTContext &Context,
|
|
const CXXRecordDecl *Record,
|
|
ASTUnresolvedSet &Output) {
|
|
// The collection of all conversions in virtual bases that we've
|
|
// found. These will be added to the output as long as they don't
|
|
// appear in the hidden-conversions set.
|
|
UnresolvedSet<8> VBaseCs;
|
|
|
|
// The set of conversions in virtual bases that we've determined to
|
|
// be hidden.
|
|
llvm::SmallPtrSet<NamedDecl*, 8> HiddenVBaseCs;
|
|
|
|
// The set of types hidden by classes derived from this one.
|
|
llvm::SmallPtrSet<CanQualType, 8> HiddenTypes;
|
|
|
|
// Go ahead and collect the direct conversions and add them to the
|
|
// hidden-types set.
|
|
CXXRecordDecl::conversion_iterator ConvI = Record->conversion_begin();
|
|
CXXRecordDecl::conversion_iterator ConvE = Record->conversion_end();
|
|
Output.append(Context, ConvI, ConvE);
|
|
for (; ConvI != ConvE; ++ConvI)
|
|
HiddenTypes.insert(GetConversionType(Context, ConvI.getDecl()));
|
|
|
|
// Recursively collect conversions from base classes.
|
|
for (const auto &I : Record->bases()) {
|
|
const auto *RT = I.getType()->getAs<RecordType>();
|
|
if (!RT) continue;
|
|
|
|
CollectVisibleConversions(Context, cast<CXXRecordDecl>(RT->getDecl()),
|
|
I.isVirtual(), I.getAccessSpecifier(),
|
|
HiddenTypes, Output, VBaseCs, HiddenVBaseCs);
|
|
}
|
|
|
|
// Add any unhidden conversions provided by virtual bases.
|
|
for (UnresolvedSetIterator I = VBaseCs.begin(), E = VBaseCs.end();
|
|
I != E; ++I) {
|
|
if (!HiddenVBaseCs.count(cast<NamedDecl>(I.getDecl()->getCanonicalDecl())))
|
|
Output.addDecl(Context, I.getDecl(), I.getAccess());
|
|
}
|
|
}
|
|
|
|
/// getVisibleConversionFunctions - get all conversion functions visible
|
|
/// in current class; including conversion function templates.
|
|
llvm::iterator_range<CXXRecordDecl::conversion_iterator>
|
|
CXXRecordDecl::getVisibleConversionFunctions() const {
|
|
ASTContext &Ctx = getASTContext();
|
|
|
|
ASTUnresolvedSet *Set;
|
|
if (bases_begin() == bases_end()) {
|
|
// If root class, all conversions are visible.
|
|
Set = &data().Conversions.get(Ctx);
|
|
} else {
|
|
Set = &data().VisibleConversions.get(Ctx);
|
|
// If visible conversion list is not evaluated, evaluate it.
|
|
if (!data().ComputedVisibleConversions) {
|
|
CollectVisibleConversions(Ctx, this, *Set);
|
|
data().ComputedVisibleConversions = true;
|
|
}
|
|
}
|
|
return llvm::make_range(Set->begin(), Set->end());
|
|
}
|
|
|
|
void CXXRecordDecl::removeConversion(const NamedDecl *ConvDecl) {
|
|
// This operation is O(N) but extremely rare. Sema only uses it to
|
|
// remove UsingShadowDecls in a class that were followed by a direct
|
|
// declaration, e.g.:
|
|
// class A : B {
|
|
// using B::operator int;
|
|
// operator int();
|
|
// };
|
|
// This is uncommon by itself and even more uncommon in conjunction
|
|
// with sufficiently large numbers of directly-declared conversions
|
|
// that asymptotic behavior matters.
|
|
|
|
ASTUnresolvedSet &Convs = data().Conversions.get(getASTContext());
|
|
for (unsigned I = 0, E = Convs.size(); I != E; ++I) {
|
|
if (Convs[I].getDecl() == ConvDecl) {
|
|
Convs.erase(I);
|
|
assert(llvm::find(Convs, ConvDecl) == Convs.end() &&
|
|
"conversion was found multiple times in unresolved set");
|
|
return;
|
|
}
|
|
}
|
|
|
|
llvm_unreachable("conversion not found in set!");
|
|
}
|
|
|
|
CXXRecordDecl *CXXRecordDecl::getInstantiatedFromMemberClass() const {
|
|
if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
|
|
return cast<CXXRecordDecl>(MSInfo->getInstantiatedFrom());
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
MemberSpecializationInfo *CXXRecordDecl::getMemberSpecializationInfo() const {
|
|
return TemplateOrInstantiation.dyn_cast<MemberSpecializationInfo *>();
|
|
}
|
|
|
|
void
|
|
CXXRecordDecl::setInstantiationOfMemberClass(CXXRecordDecl *RD,
|
|
TemplateSpecializationKind TSK) {
|
|
assert(TemplateOrInstantiation.isNull() &&
|
|
"Previous template or instantiation?");
|
|
assert(!isa<ClassTemplatePartialSpecializationDecl>(this));
|
|
TemplateOrInstantiation
|
|
= new (getASTContext()) MemberSpecializationInfo(RD, TSK);
|
|
}
|
|
|
|
ClassTemplateDecl *CXXRecordDecl::getDescribedClassTemplate() const {
|
|
return TemplateOrInstantiation.dyn_cast<ClassTemplateDecl *>();
|
|
}
|
|
|
|
void CXXRecordDecl::setDescribedClassTemplate(ClassTemplateDecl *Template) {
|
|
TemplateOrInstantiation = Template;
|
|
}
|
|
|
|
TemplateSpecializationKind CXXRecordDecl::getTemplateSpecializationKind() const{
|
|
if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(this))
|
|
return Spec->getSpecializationKind();
|
|
|
|
if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
|
|
return MSInfo->getTemplateSpecializationKind();
|
|
|
|
return TSK_Undeclared;
|
|
}
|
|
|
|
void
|
|
CXXRecordDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK) {
|
|
if (auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(this)) {
|
|
Spec->setSpecializationKind(TSK);
|
|
return;
|
|
}
|
|
|
|
if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
|
|
MSInfo->setTemplateSpecializationKind(TSK);
|
|
return;
|
|
}
|
|
|
|
llvm_unreachable("Not a class template or member class specialization");
|
|
}
|
|
|
|
const CXXRecordDecl *CXXRecordDecl::getTemplateInstantiationPattern() const {
|
|
auto GetDefinitionOrSelf =
|
|
[](const CXXRecordDecl *D) -> const CXXRecordDecl * {
|
|
if (auto *Def = D->getDefinition())
|
|
return Def;
|
|
return D;
|
|
};
|
|
|
|
// If it's a class template specialization, find the template or partial
|
|
// specialization from which it was instantiated.
|
|
if (auto *TD = dyn_cast<ClassTemplateSpecializationDecl>(this)) {
|
|
auto From = TD->getInstantiatedFrom();
|
|
if (auto *CTD = From.dyn_cast<ClassTemplateDecl *>()) {
|
|
while (auto *NewCTD = CTD->getInstantiatedFromMemberTemplate()) {
|
|
if (NewCTD->isMemberSpecialization())
|
|
break;
|
|
CTD = NewCTD;
|
|
}
|
|
return GetDefinitionOrSelf(CTD->getTemplatedDecl());
|
|
}
|
|
if (auto *CTPSD =
|
|
From.dyn_cast<ClassTemplatePartialSpecializationDecl *>()) {
|
|
while (auto *NewCTPSD = CTPSD->getInstantiatedFromMember()) {
|
|
if (NewCTPSD->isMemberSpecialization())
|
|
break;
|
|
CTPSD = NewCTPSD;
|
|
}
|
|
return GetDefinitionOrSelf(CTPSD);
|
|
}
|
|
}
|
|
|
|
if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
|
|
if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
|
|
const CXXRecordDecl *RD = this;
|
|
while (auto *NewRD = RD->getInstantiatedFromMemberClass())
|
|
RD = NewRD;
|
|
return GetDefinitionOrSelf(RD);
|
|
}
|
|
}
|
|
|
|
assert(!isTemplateInstantiation(this->getTemplateSpecializationKind()) &&
|
|
"couldn't find pattern for class template instantiation");
|
|
return nullptr;
|
|
}
|
|
|
|
CXXDestructorDecl *CXXRecordDecl::getDestructor() const {
|
|
ASTContext &Context = getASTContext();
|
|
QualType ClassType = Context.getTypeDeclType(this);
|
|
|
|
DeclarationName Name
|
|
= Context.DeclarationNames.getCXXDestructorName(
|
|
Context.getCanonicalType(ClassType));
|
|
|
|
DeclContext::lookup_result R = lookup(Name);
|
|
|
|
return R.empty() ? nullptr : dyn_cast<CXXDestructorDecl>(R.front());
|
|
}
|
|
|
|
bool CXXRecordDecl::isAnyDestructorNoReturn() const {
|
|
// Destructor is noreturn.
|
|
if (const CXXDestructorDecl *Destructor = getDestructor())
|
|
if (Destructor->isNoReturn())
|
|
return true;
|
|
|
|
// Check base classes destructor for noreturn.
|
|
for (const auto &Base : bases())
|
|
if (const CXXRecordDecl *RD = Base.getType()->getAsCXXRecordDecl())
|
|
if (RD->isAnyDestructorNoReturn())
|
|
return true;
|
|
|
|
// Check fields for noreturn.
|
|
for (const auto *Field : fields())
|
|
if (const CXXRecordDecl *RD =
|
|
Field->getType()->getBaseElementTypeUnsafe()->getAsCXXRecordDecl())
|
|
if (RD->isAnyDestructorNoReturn())
|
|
return true;
|
|
|
|
// All destructors are not noreturn.
|
|
return false;
|
|
}
|
|
|
|
static bool isDeclContextInNamespace(const DeclContext *DC) {
|
|
while (!DC->isTranslationUnit()) {
|
|
if (DC->isNamespace())
|
|
return true;
|
|
DC = DC->getParent();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool CXXRecordDecl::isInterfaceLike() const {
|
|
assert(hasDefinition() && "checking for interface-like without a definition");
|
|
// All __interfaces are inheritently interface-like.
|
|
if (isInterface())
|
|
return true;
|
|
|
|
// Interface-like types cannot have a user declared constructor, destructor,
|
|
// friends, VBases, conversion functions, or fields. Additionally, lambdas
|
|
// cannot be interface types.
|
|
if (isLambda() || hasUserDeclaredConstructor() ||
|
|
hasUserDeclaredDestructor() || !field_empty() || hasFriends() ||
|
|
getNumVBases() > 0 || conversion_end() - conversion_begin() > 0)
|
|
return false;
|
|
|
|
// No interface-like type can have a method with a definition.
|
|
for (const auto *const Method : methods())
|
|
if (Method->isDefined() && !Method->isImplicit())
|
|
return false;
|
|
|
|
// Check "Special" types.
|
|
const auto *Uuid = getAttr<UuidAttr>();
|
|
// MS SDK declares IUnknown/IDispatch both in the root of a TU, or in an
|
|
// extern C++ block directly in the TU. These are only valid if in one
|
|
// of these two situations.
|
|
if (Uuid && isStruct() && !getDeclContext()->isExternCContext() &&
|
|
!isDeclContextInNamespace(getDeclContext()) &&
|
|
((getName() == "IUnknown" &&
|
|
Uuid->getGuid() == "00000000-0000-0000-C000-000000000046") ||
|
|
(getName() == "IDispatch" &&
|
|
Uuid->getGuid() == "00020400-0000-0000-C000-000000000046"))) {
|
|
if (getNumBases() > 0)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
// FIXME: Any access specifiers is supposed to make this no longer interface
|
|
// like.
|
|
|
|
// If this isn't a 'special' type, it must have a single interface-like base.
|
|
if (getNumBases() != 1)
|
|
return false;
|
|
|
|
const auto BaseSpec = *bases_begin();
|
|
if (BaseSpec.isVirtual() || BaseSpec.getAccessSpecifier() != AS_public)
|
|
return false;
|
|
const auto *Base = BaseSpec.getType()->getAsCXXRecordDecl();
|
|
if (Base->isInterface() || !Base->isInterfaceLike())
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
void CXXRecordDecl::completeDefinition() {
|
|
completeDefinition(nullptr);
|
|
}
|
|
|
|
void CXXRecordDecl::completeDefinition(CXXFinalOverriderMap *FinalOverriders) {
|
|
RecordDecl::completeDefinition();
|
|
|
|
// If the class may be abstract (but hasn't been marked as such), check for
|
|
// any pure final overriders.
|
|
if (mayBeAbstract()) {
|
|
CXXFinalOverriderMap MyFinalOverriders;
|
|
if (!FinalOverriders) {
|
|
getFinalOverriders(MyFinalOverriders);
|
|
FinalOverriders = &MyFinalOverriders;
|
|
}
|
|
|
|
bool Done = false;
|
|
for (CXXFinalOverriderMap::iterator M = FinalOverriders->begin(),
|
|
MEnd = FinalOverriders->end();
|
|
M != MEnd && !Done; ++M) {
|
|
for (OverridingMethods::iterator SO = M->second.begin(),
|
|
SOEnd = M->second.end();
|
|
SO != SOEnd && !Done; ++SO) {
|
|
assert(SO->second.size() > 0 &&
|
|
"All virtual functions have overriding virtual functions");
|
|
|
|
// C++ [class.abstract]p4:
|
|
// A class is abstract if it contains or inherits at least one
|
|
// pure virtual function for which the final overrider is pure
|
|
// virtual.
|
|
if (SO->second.front().Method->isPure()) {
|
|
data().Abstract = true;
|
|
Done = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Set access bits correctly on the directly-declared conversions.
|
|
for (conversion_iterator I = conversion_begin(), E = conversion_end();
|
|
I != E; ++I)
|
|
I.setAccess((*I)->getAccess());
|
|
}
|
|
|
|
bool CXXRecordDecl::mayBeAbstract() const {
|
|
if (data().Abstract || isInvalidDecl() || !data().Polymorphic ||
|
|
isDependentContext())
|
|
return false;
|
|
|
|
for (const auto &B : bases()) {
|
|
const auto *BaseDecl =
|
|
cast<CXXRecordDecl>(B.getType()->castAs<RecordType>()->getDecl());
|
|
if (BaseDecl->isAbstract())
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool CXXRecordDecl::isEffectivelyFinal() const {
|
|
auto *Def = getDefinition();
|
|
if (!Def)
|
|
return false;
|
|
if (Def->hasAttr<FinalAttr>())
|
|
return true;
|
|
if (const auto *Dtor = Def->getDestructor())
|
|
if (Dtor->hasAttr<FinalAttr>())
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
void CXXDeductionGuideDecl::anchor() {}
|
|
|
|
bool ExplicitSpecifier::isEquivalent(const ExplicitSpecifier Other) const {
|
|
if ((getKind() != Other.getKind() ||
|
|
getKind() == ExplicitSpecKind::Unresolved)) {
|
|
if (getKind() == ExplicitSpecKind::Unresolved &&
|
|
Other.getKind() == ExplicitSpecKind::Unresolved) {
|
|
ODRHash SelfHash, OtherHash;
|
|
SelfHash.AddStmt(getExpr());
|
|
OtherHash.AddStmt(Other.getExpr());
|
|
return SelfHash.CalculateHash() == OtherHash.CalculateHash();
|
|
} else
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
ExplicitSpecifier ExplicitSpecifier::getFromDecl(FunctionDecl *Function) {
|
|
switch (Function->getDeclKind()) {
|
|
case Decl::Kind::CXXConstructor:
|
|
return cast<CXXConstructorDecl>(Function)->getExplicitSpecifier();
|
|
case Decl::Kind::CXXConversion:
|
|
return cast<CXXConversionDecl>(Function)->getExplicitSpecifier();
|
|
case Decl::Kind::CXXDeductionGuide:
|
|
return cast<CXXDeductionGuideDecl>(Function)->getExplicitSpecifier();
|
|
default:
|
|
return {};
|
|
}
|
|
}
|
|
|
|
CXXDeductionGuideDecl *CXXDeductionGuideDecl::Create(
|
|
ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
|
|
ExplicitSpecifier ES, const DeclarationNameInfo &NameInfo, QualType T,
|
|
TypeSourceInfo *TInfo, SourceLocation EndLocation) {
|
|
return new (C, DC) CXXDeductionGuideDecl(C, DC, StartLoc, ES, NameInfo, T,
|
|
TInfo, EndLocation);
|
|
}
|
|
|
|
CXXDeductionGuideDecl *CXXDeductionGuideDecl::CreateDeserialized(ASTContext &C,
|
|
unsigned ID) {
|
|
return new (C, ID) CXXDeductionGuideDecl(
|
|
C, nullptr, SourceLocation(), ExplicitSpecifier(), DeclarationNameInfo(),
|
|
QualType(), nullptr, SourceLocation());
|
|
}
|
|
|
|
RequiresExprBodyDecl *RequiresExprBodyDecl::Create(
|
|
ASTContext &C, DeclContext *DC, SourceLocation StartLoc) {
|
|
return new (C, DC) RequiresExprBodyDecl(C, DC, StartLoc);
|
|
}
|
|
|
|
RequiresExprBodyDecl *RequiresExprBodyDecl::CreateDeserialized(ASTContext &C,
|
|
unsigned ID) {
|
|
return new (C, ID) RequiresExprBodyDecl(C, nullptr, SourceLocation());
|
|
}
|
|
|
|
void CXXMethodDecl::anchor() {}
|
|
|
|
bool CXXMethodDecl::isStatic() const {
|
|
const CXXMethodDecl *MD = getCanonicalDecl();
|
|
|
|
if (MD->getStorageClass() == SC_Static)
|
|
return true;
|
|
|
|
OverloadedOperatorKind OOK = getDeclName().getCXXOverloadedOperator();
|
|
return isStaticOverloadedOperator(OOK);
|
|
}
|
|
|
|
static bool recursivelyOverrides(const CXXMethodDecl *DerivedMD,
|
|
const CXXMethodDecl *BaseMD) {
|
|
for (const CXXMethodDecl *MD : DerivedMD->overridden_methods()) {
|
|
if (MD->getCanonicalDecl() == BaseMD->getCanonicalDecl())
|
|
return true;
|
|
if (recursivelyOverrides(MD, BaseMD))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
CXXMethodDecl *
|
|
CXXMethodDecl::getCorrespondingMethodDeclaredInClass(const CXXRecordDecl *RD,
|
|
bool MayBeBase) {
|
|
if (this->getParent()->getCanonicalDecl() == RD->getCanonicalDecl())
|
|
return this;
|
|
|
|
// Lookup doesn't work for destructors, so handle them separately.
|
|
if (isa<CXXDestructorDecl>(this)) {
|
|
CXXMethodDecl *MD = RD->getDestructor();
|
|
if (MD) {
|
|
if (recursivelyOverrides(MD, this))
|
|
return MD;
|
|
if (MayBeBase && recursivelyOverrides(this, MD))
|
|
return MD;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
for (auto *ND : RD->lookup(getDeclName())) {
|
|
auto *MD = dyn_cast<CXXMethodDecl>(ND);
|
|
if (!MD)
|
|
continue;
|
|
if (recursivelyOverrides(MD, this))
|
|
return MD;
|
|
if (MayBeBase && recursivelyOverrides(this, MD))
|
|
return MD;
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
CXXMethodDecl *
|
|
CXXMethodDecl::getCorrespondingMethodInClass(const CXXRecordDecl *RD,
|
|
bool MayBeBase) {
|
|
if (auto *MD = getCorrespondingMethodDeclaredInClass(RD, MayBeBase))
|
|
return MD;
|
|
|
|
llvm::SmallVector<CXXMethodDecl*, 4> FinalOverriders;
|
|
auto AddFinalOverrider = [&](CXXMethodDecl *D) {
|
|
// If this function is overridden by a candidate final overrider, it is not
|
|
// a final overrider.
|
|
for (CXXMethodDecl *OtherD : FinalOverriders) {
|
|
if (declaresSameEntity(D, OtherD) || recursivelyOverrides(OtherD, D))
|
|
return;
|
|
}
|
|
|
|
// Other candidate final overriders might be overridden by this function.
|
|
FinalOverriders.erase(
|
|
std::remove_if(FinalOverriders.begin(), FinalOverriders.end(),
|
|
[&](CXXMethodDecl *OtherD) {
|
|
return recursivelyOverrides(D, OtherD);
|
|
}),
|
|
FinalOverriders.end());
|
|
|
|
FinalOverriders.push_back(D);
|
|
};
|
|
|
|
for (const auto &I : RD->bases()) {
|
|
const RecordType *RT = I.getType()->getAs<RecordType>();
|
|
if (!RT)
|
|
continue;
|
|
const auto *Base = cast<CXXRecordDecl>(RT->getDecl());
|
|
if (CXXMethodDecl *D = this->getCorrespondingMethodInClass(Base))
|
|
AddFinalOverrider(D);
|
|
}
|
|
|
|
return FinalOverriders.size() == 1 ? FinalOverriders.front() : nullptr;
|
|
}
|
|
|
|
CXXMethodDecl *CXXMethodDecl::Create(ASTContext &C, CXXRecordDecl *RD,
|
|
SourceLocation StartLoc,
|
|
const DeclarationNameInfo &NameInfo,
|
|
QualType T, TypeSourceInfo *TInfo,
|
|
StorageClass SC, bool isInline,
|
|
ConstexprSpecKind ConstexprKind,
|
|
SourceLocation EndLocation,
|
|
Expr *TrailingRequiresClause) {
|
|
return new (C, RD)
|
|
CXXMethodDecl(CXXMethod, C, RD, StartLoc, NameInfo, T, TInfo, SC,
|
|
isInline, ConstexprKind, EndLocation,
|
|
TrailingRequiresClause);
|
|
}
|
|
|
|
CXXMethodDecl *CXXMethodDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
|
|
return new (C, ID)
|
|
CXXMethodDecl(CXXMethod, C, nullptr, SourceLocation(),
|
|
DeclarationNameInfo(), QualType(), nullptr, SC_None, false,
|
|
ConstexprSpecKind::Unspecified, SourceLocation(), nullptr);
|
|
}
|
|
|
|
CXXMethodDecl *CXXMethodDecl::getDevirtualizedMethod(const Expr *Base,
|
|
bool IsAppleKext) {
|
|
assert(isVirtual() && "this method is expected to be virtual");
|
|
|
|
// When building with -fapple-kext, all calls must go through the vtable since
|
|
// the kernel linker can do runtime patching of vtables.
|
|
if (IsAppleKext)
|
|
return nullptr;
|
|
|
|
// If the member function is marked 'final', we know that it can't be
|
|
// overridden and can therefore devirtualize it unless it's pure virtual.
|
|
if (hasAttr<FinalAttr>())
|
|
return isPure() ? nullptr : this;
|
|
|
|
// If Base is unknown, we cannot devirtualize.
|
|
if (!Base)
|
|
return nullptr;
|
|
|
|
// If the base expression (after skipping derived-to-base conversions) is a
|
|
// class prvalue, then we can devirtualize.
|
|
Base = Base->getBestDynamicClassTypeExpr();
|
|
if (Base->isRValue() && Base->getType()->isRecordType())
|
|
return this;
|
|
|
|
// If we don't even know what we would call, we can't devirtualize.
|
|
const CXXRecordDecl *BestDynamicDecl = Base->getBestDynamicClassType();
|
|
if (!BestDynamicDecl)
|
|
return nullptr;
|
|
|
|
// There may be a method corresponding to MD in a derived class.
|
|
CXXMethodDecl *DevirtualizedMethod =
|
|
getCorrespondingMethodInClass(BestDynamicDecl);
|
|
|
|
// If there final overrider in the dynamic type is ambiguous, we can't
|
|
// devirtualize this call.
|
|
if (!DevirtualizedMethod)
|
|
return nullptr;
|
|
|
|
// If that method is pure virtual, we can't devirtualize. If this code is
|
|
// reached, the result would be UB, not a direct call to the derived class
|
|
// function, and we can't assume the derived class function is defined.
|
|
if (DevirtualizedMethod->isPure())
|
|
return nullptr;
|
|
|
|
// If that method is marked final, we can devirtualize it.
|
|
if (DevirtualizedMethod->hasAttr<FinalAttr>())
|
|
return DevirtualizedMethod;
|
|
|
|
// Similarly, if the class itself or its destructor is marked 'final',
|
|
// the class can't be derived from and we can therefore devirtualize the
|
|
// member function call.
|
|
if (BestDynamicDecl->isEffectivelyFinal())
|
|
return DevirtualizedMethod;
|
|
|
|
if (const auto *DRE = dyn_cast<DeclRefExpr>(Base)) {
|
|
if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
|
|
if (VD->getType()->isRecordType())
|
|
// This is a record decl. We know the type and can devirtualize it.
|
|
return DevirtualizedMethod;
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
// We can devirtualize calls on an object accessed by a class member access
|
|
// expression, since by C++11 [basic.life]p6 we know that it can't refer to
|
|
// a derived class object constructed in the same location.
|
|
if (const auto *ME = dyn_cast<MemberExpr>(Base)) {
|
|
const ValueDecl *VD = ME->getMemberDecl();
|
|
return VD->getType()->isRecordType() ? DevirtualizedMethod : nullptr;
|
|
}
|
|
|
|
// Likewise for calls on an object accessed by a (non-reference) pointer to
|
|
// member access.
|
|
if (auto *BO = dyn_cast<BinaryOperator>(Base)) {
|
|
if (BO->isPtrMemOp()) {
|
|
auto *MPT = BO->getRHS()->getType()->castAs<MemberPointerType>();
|
|
if (MPT->getPointeeType()->isRecordType())
|
|
return DevirtualizedMethod;
|
|
}
|
|
}
|
|
|
|
// We can't devirtualize the call.
|
|
return nullptr;
|
|
}
|
|
|
|
bool CXXMethodDecl::isUsualDeallocationFunction(
|
|
SmallVectorImpl<const FunctionDecl *> &PreventedBy) const {
|
|
assert(PreventedBy.empty() && "PreventedBy is expected to be empty");
|
|
if (getOverloadedOperator() != OO_Delete &&
|
|
getOverloadedOperator() != OO_Array_Delete)
|
|
return false;
|
|
|
|
// C++ [basic.stc.dynamic.deallocation]p2:
|
|
// A template instance is never a usual deallocation function,
|
|
// regardless of its signature.
|
|
if (getPrimaryTemplate())
|
|
return false;
|
|
|
|
// C++ [basic.stc.dynamic.deallocation]p2:
|
|
// If a class T has a member deallocation function named operator delete
|
|
// with exactly one parameter, then that function is a usual (non-placement)
|
|
// deallocation function. [...]
|
|
if (getNumParams() == 1)
|
|
return true;
|
|
unsigned UsualParams = 1;
|
|
|
|
// C++ P0722:
|
|
// A destroying operator delete is a usual deallocation function if
|
|
// removing the std::destroying_delete_t parameter and changing the
|
|
// first parameter type from T* to void* results in the signature of
|
|
// a usual deallocation function.
|
|
if (isDestroyingOperatorDelete())
|
|
++UsualParams;
|
|
|
|
// C++ <=14 [basic.stc.dynamic.deallocation]p2:
|
|
// [...] If class T does not declare such an operator delete but does
|
|
// declare a member deallocation function named operator delete with
|
|
// exactly two parameters, the second of which has type std::size_t (18.1),
|
|
// then this function is a usual deallocation function.
|
|
//
|
|
// C++17 says a usual deallocation function is one with the signature
|
|
// (void* [, size_t] [, std::align_val_t] [, ...])
|
|
// and all such functions are usual deallocation functions. It's not clear
|
|
// that allowing varargs functions was intentional.
|
|
ASTContext &Context = getASTContext();
|
|
if (UsualParams < getNumParams() &&
|
|
Context.hasSameUnqualifiedType(getParamDecl(UsualParams)->getType(),
|
|
Context.getSizeType()))
|
|
++UsualParams;
|
|
|
|
if (UsualParams < getNumParams() &&
|
|
getParamDecl(UsualParams)->getType()->isAlignValT())
|
|
++UsualParams;
|
|
|
|
if (UsualParams != getNumParams())
|
|
return false;
|
|
|
|
// In C++17 onwards, all potential usual deallocation functions are actual
|
|
// usual deallocation functions. Honor this behavior when post-C++14
|
|
// deallocation functions are offered as extensions too.
|
|
// FIXME(EricWF): Destrying Delete should be a language option. How do we
|
|
// handle when destroying delete is used prior to C++17?
|
|
if (Context.getLangOpts().CPlusPlus17 ||
|
|
Context.getLangOpts().AlignedAllocation ||
|
|
isDestroyingOperatorDelete())
|
|
return true;
|
|
|
|
// This function is a usual deallocation function if there are no
|
|
// single-parameter deallocation functions of the same kind.
|
|
DeclContext::lookup_result R = getDeclContext()->lookup(getDeclName());
|
|
bool Result = true;
|
|
for (const auto *D : R) {
|
|
if (const auto *FD = dyn_cast<FunctionDecl>(D)) {
|
|
if (FD->getNumParams() == 1) {
|
|
PreventedBy.push_back(FD);
|
|
Result = false;
|
|
}
|
|
}
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
bool CXXMethodDecl::isCopyAssignmentOperator() const {
|
|
// C++0x [class.copy]p17:
|
|
// A user-declared copy assignment operator X::operator= is a non-static
|
|
// non-template member function of class X with exactly one parameter of
|
|
// type X, X&, const X&, volatile X& or const volatile X&.
|
|
if (/*operator=*/getOverloadedOperator() != OO_Equal ||
|
|
/*non-static*/ isStatic() ||
|
|
/*non-template*/getPrimaryTemplate() || getDescribedFunctionTemplate() ||
|
|
getNumParams() != 1)
|
|
return false;
|
|
|
|
QualType ParamType = getParamDecl(0)->getType();
|
|
if (const auto *Ref = ParamType->getAs<LValueReferenceType>())
|
|
ParamType = Ref->getPointeeType();
|
|
|
|
ASTContext &Context = getASTContext();
|
|
QualType ClassType
|
|
= Context.getCanonicalType(Context.getTypeDeclType(getParent()));
|
|
return Context.hasSameUnqualifiedType(ClassType, ParamType);
|
|
}
|
|
|
|
bool CXXMethodDecl::isMoveAssignmentOperator() const {
|
|
// C++0x [class.copy]p19:
|
|
// A user-declared move assignment operator X::operator= is a non-static
|
|
// non-template member function of class X with exactly one parameter of type
|
|
// X&&, const X&&, volatile X&&, or const volatile X&&.
|
|
if (getOverloadedOperator() != OO_Equal || isStatic() ||
|
|
getPrimaryTemplate() || getDescribedFunctionTemplate() ||
|
|
getNumParams() != 1)
|
|
return false;
|
|
|
|
QualType ParamType = getParamDecl(0)->getType();
|
|
if (!isa<RValueReferenceType>(ParamType))
|
|
return false;
|
|
ParamType = ParamType->getPointeeType();
|
|
|
|
ASTContext &Context = getASTContext();
|
|
QualType ClassType
|
|
= Context.getCanonicalType(Context.getTypeDeclType(getParent()));
|
|
return Context.hasSameUnqualifiedType(ClassType, ParamType);
|
|
}
|
|
|
|
void CXXMethodDecl::addOverriddenMethod(const CXXMethodDecl *MD) {
|
|
assert(MD->isCanonicalDecl() && "Method is not canonical!");
|
|
assert(!MD->getParent()->isDependentContext() &&
|
|
"Can't add an overridden method to a class template!");
|
|
assert(MD->isVirtual() && "Method is not virtual!");
|
|
|
|
getASTContext().addOverriddenMethod(this, MD);
|
|
}
|
|
|
|
CXXMethodDecl::method_iterator CXXMethodDecl::begin_overridden_methods() const {
|
|
if (isa<CXXConstructorDecl>(this)) return nullptr;
|
|
return getASTContext().overridden_methods_begin(this);
|
|
}
|
|
|
|
CXXMethodDecl::method_iterator CXXMethodDecl::end_overridden_methods() const {
|
|
if (isa<CXXConstructorDecl>(this)) return nullptr;
|
|
return getASTContext().overridden_methods_end(this);
|
|
}
|
|
|
|
unsigned CXXMethodDecl::size_overridden_methods() const {
|
|
if (isa<CXXConstructorDecl>(this)) return 0;
|
|
return getASTContext().overridden_methods_size(this);
|
|
}
|
|
|
|
CXXMethodDecl::overridden_method_range
|
|
CXXMethodDecl::overridden_methods() const {
|
|
if (isa<CXXConstructorDecl>(this))
|
|
return overridden_method_range(nullptr, nullptr);
|
|
return getASTContext().overridden_methods(this);
|
|
}
|
|
|
|
static QualType getThisObjectType(ASTContext &C, const FunctionProtoType *FPT,
|
|
const CXXRecordDecl *Decl) {
|
|
QualType ClassTy = C.getTypeDeclType(Decl);
|
|
return C.getQualifiedType(ClassTy, FPT->getMethodQuals());
|
|
}
|
|
|
|
QualType CXXMethodDecl::getThisType(const FunctionProtoType *FPT,
|
|
const CXXRecordDecl *Decl) {
|
|
ASTContext &C = Decl->getASTContext();
|
|
QualType ObjectTy = ::getThisObjectType(C, FPT, Decl);
|
|
return C.getPointerType(ObjectTy);
|
|
}
|
|
|
|
QualType CXXMethodDecl::getThisObjectType(const FunctionProtoType *FPT,
|
|
const CXXRecordDecl *Decl) {
|
|
ASTContext &C = Decl->getASTContext();
|
|
return ::getThisObjectType(C, FPT, Decl);
|
|
}
|
|
|
|
QualType CXXMethodDecl::getThisType() const {
|
|
// C++ 9.3.2p1: The type of this in a member function of a class X is X*.
|
|
// If the member function is declared const, the type of this is const X*,
|
|
// if the member function is declared volatile, the type of this is
|
|
// volatile X*, and if the member function is declared const volatile,
|
|
// the type of this is const volatile X*.
|
|
assert(isInstance() && "No 'this' for static methods!");
|
|
return CXXMethodDecl::getThisType(getType()->castAs<FunctionProtoType>(),
|
|
getParent());
|
|
}
|
|
|
|
QualType CXXMethodDecl::getThisObjectType() const {
|
|
// Ditto getThisType.
|
|
assert(isInstance() && "No 'this' for static methods!");
|
|
return CXXMethodDecl::getThisObjectType(
|
|
getType()->castAs<FunctionProtoType>(), getParent());
|
|
}
|
|
|
|
bool CXXMethodDecl::hasInlineBody() const {
|
|
// If this function is a template instantiation, look at the template from
|
|
// which it was instantiated.
|
|
const FunctionDecl *CheckFn = getTemplateInstantiationPattern();
|
|
if (!CheckFn)
|
|
CheckFn = this;
|
|
|
|
const FunctionDecl *fn;
|
|
return CheckFn->isDefined(fn) && !fn->isOutOfLine() &&
|
|
(fn->doesThisDeclarationHaveABody() || fn->willHaveBody());
|
|
}
|
|
|
|
bool CXXMethodDecl::isLambdaStaticInvoker() const {
|
|
const CXXRecordDecl *P = getParent();
|
|
return P->isLambda() && getDeclName().isIdentifier() &&
|
|
getName() == getLambdaStaticInvokerName();
|
|
}
|
|
|
|
CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
|
|
TypeSourceInfo *TInfo, bool IsVirtual,
|
|
SourceLocation L, Expr *Init,
|
|
SourceLocation R,
|
|
SourceLocation EllipsisLoc)
|
|
: Initializee(TInfo), MemberOrEllipsisLocation(EllipsisLoc), Init(Init),
|
|
LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(IsVirtual),
|
|
IsWritten(false), SourceOrder(0) {}
|
|
|
|
CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
|
|
FieldDecl *Member,
|
|
SourceLocation MemberLoc,
|
|
SourceLocation L, Expr *Init,
|
|
SourceLocation R)
|
|
: Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
|
|
LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
|
|
IsWritten(false), SourceOrder(0) {}
|
|
|
|
CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
|
|
IndirectFieldDecl *Member,
|
|
SourceLocation MemberLoc,
|
|
SourceLocation L, Expr *Init,
|
|
SourceLocation R)
|
|
: Initializee(Member), MemberOrEllipsisLocation(MemberLoc), Init(Init),
|
|
LParenLoc(L), RParenLoc(R), IsDelegating(false), IsVirtual(false),
|
|
IsWritten(false), SourceOrder(0) {}
|
|
|
|
CXXCtorInitializer::CXXCtorInitializer(ASTContext &Context,
|
|
TypeSourceInfo *TInfo,
|
|
SourceLocation L, Expr *Init,
|
|
SourceLocation R)
|
|
: Initializee(TInfo), Init(Init), LParenLoc(L), RParenLoc(R),
|
|
IsDelegating(true), IsVirtual(false), IsWritten(false), SourceOrder(0) {}
|
|
|
|
int64_t CXXCtorInitializer::getID(const ASTContext &Context) const {
|
|
return Context.getAllocator()
|
|
.identifyKnownAlignedObject<CXXCtorInitializer>(this);
|
|
}
|
|
|
|
TypeLoc CXXCtorInitializer::getBaseClassLoc() const {
|
|
if (isBaseInitializer())
|
|
return Initializee.get<TypeSourceInfo*>()->getTypeLoc();
|
|
else
|
|
return {};
|
|
}
|
|
|
|
const Type *CXXCtorInitializer::getBaseClass() const {
|
|
if (isBaseInitializer())
|
|
return Initializee.get<TypeSourceInfo*>()->getType().getTypePtr();
|
|
else
|
|
return nullptr;
|
|
}
|
|
|
|
SourceLocation CXXCtorInitializer::getSourceLocation() const {
|
|
if (isInClassMemberInitializer())
|
|
return getAnyMember()->getLocation();
|
|
|
|
if (isAnyMemberInitializer())
|
|
return getMemberLocation();
|
|
|
|
if (const auto *TSInfo = Initializee.get<TypeSourceInfo *>())
|
|
return TSInfo->getTypeLoc().getLocalSourceRange().getBegin();
|
|
|
|
return {};
|
|
}
|
|
|
|
SourceRange CXXCtorInitializer::getSourceRange() const {
|
|
if (isInClassMemberInitializer()) {
|
|
FieldDecl *D = getAnyMember();
|
|
if (Expr *I = D->getInClassInitializer())
|
|
return I->getSourceRange();
|
|
return {};
|
|
}
|
|
|
|
return SourceRange(getSourceLocation(), getRParenLoc());
|
|
}
|
|
|
|
CXXConstructorDecl::CXXConstructorDecl(
|
|
ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
|
|
const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
|
|
ExplicitSpecifier ES, bool isInline, bool isImplicitlyDeclared,
|
|
ConstexprSpecKind ConstexprKind, InheritedConstructor Inherited,
|
|
Expr *TrailingRequiresClause)
|
|
: CXXMethodDecl(CXXConstructor, C, RD, StartLoc, NameInfo, T, TInfo,
|
|
SC_None, isInline, ConstexprKind, SourceLocation(),
|
|
TrailingRequiresClause) {
|
|
setNumCtorInitializers(0);
|
|
setInheritingConstructor(static_cast<bool>(Inherited));
|
|
setImplicit(isImplicitlyDeclared);
|
|
CXXConstructorDeclBits.HasTrailingExplicitSpecifier = ES.getExpr() ? 1 : 0;
|
|
if (Inherited)
|
|
*getTrailingObjects<InheritedConstructor>() = Inherited;
|
|
setExplicitSpecifier(ES);
|
|
}
|
|
|
|
void CXXConstructorDecl::anchor() {}
|
|
|
|
CXXConstructorDecl *CXXConstructorDecl::CreateDeserialized(ASTContext &C,
|
|
unsigned ID,
|
|
uint64_t AllocKind) {
|
|
bool hasTraillingExplicit = static_cast<bool>(AllocKind & TAKHasTailExplicit);
|
|
bool isInheritingConstructor =
|
|
static_cast<bool>(AllocKind & TAKInheritsConstructor);
|
|
unsigned Extra =
|
|
additionalSizeToAlloc<InheritedConstructor, ExplicitSpecifier>(
|
|
isInheritingConstructor, hasTraillingExplicit);
|
|
auto *Result = new (C, ID, Extra) CXXConstructorDecl(
|
|
C, nullptr, SourceLocation(), DeclarationNameInfo(), QualType(), nullptr,
|
|
ExplicitSpecifier(), false, false, ConstexprSpecKind::Unspecified,
|
|
InheritedConstructor(), nullptr);
|
|
Result->setInheritingConstructor(isInheritingConstructor);
|
|
Result->CXXConstructorDeclBits.HasTrailingExplicitSpecifier =
|
|
hasTraillingExplicit;
|
|
Result->setExplicitSpecifier(ExplicitSpecifier());
|
|
return Result;
|
|
}
|
|
|
|
CXXConstructorDecl *CXXConstructorDecl::Create(
|
|
ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
|
|
const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
|
|
ExplicitSpecifier ES, bool isInline, bool isImplicitlyDeclared,
|
|
ConstexprSpecKind ConstexprKind, InheritedConstructor Inherited,
|
|
Expr *TrailingRequiresClause) {
|
|
assert(NameInfo.getName().getNameKind()
|
|
== DeclarationName::CXXConstructorName &&
|
|
"Name must refer to a constructor");
|
|
unsigned Extra =
|
|
additionalSizeToAlloc<InheritedConstructor, ExplicitSpecifier>(
|
|
Inherited ? 1 : 0, ES.getExpr() ? 1 : 0);
|
|
return new (C, RD, Extra)
|
|
CXXConstructorDecl(C, RD, StartLoc, NameInfo, T, TInfo, ES, isInline,
|
|
isImplicitlyDeclared, ConstexprKind, Inherited,
|
|
TrailingRequiresClause);
|
|
}
|
|
|
|
CXXConstructorDecl::init_const_iterator CXXConstructorDecl::init_begin() const {
|
|
return CtorInitializers.get(getASTContext().getExternalSource());
|
|
}
|
|
|
|
CXXConstructorDecl *CXXConstructorDecl::getTargetConstructor() const {
|
|
assert(isDelegatingConstructor() && "Not a delegating constructor!");
|
|
Expr *E = (*init_begin())->getInit()->IgnoreImplicit();
|
|
if (const auto *Construct = dyn_cast<CXXConstructExpr>(E))
|
|
return Construct->getConstructor();
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
bool CXXConstructorDecl::isDefaultConstructor() const {
|
|
// C++ [class.default.ctor]p1:
|
|
// A default constructor for a class X is a constructor of class X for
|
|
// which each parameter that is not a function parameter pack has a default
|
|
// argument (including the case of a constructor with no parameters)
|
|
return getMinRequiredArguments() == 0;
|
|
}
|
|
|
|
bool
|
|
CXXConstructorDecl::isCopyConstructor(unsigned &TypeQuals) const {
|
|
return isCopyOrMoveConstructor(TypeQuals) &&
|
|
getParamDecl(0)->getType()->isLValueReferenceType();
|
|
}
|
|
|
|
bool CXXConstructorDecl::isMoveConstructor(unsigned &TypeQuals) const {
|
|
return isCopyOrMoveConstructor(TypeQuals) &&
|
|
getParamDecl(0)->getType()->isRValueReferenceType();
|
|
}
|
|
|
|
/// Determine whether this is a copy or move constructor.
|
|
bool CXXConstructorDecl::isCopyOrMoveConstructor(unsigned &TypeQuals) const {
|
|
// C++ [class.copy]p2:
|
|
// A non-template constructor for class X is a copy constructor
|
|
// if its first parameter is of type X&, const X&, volatile X& or
|
|
// const volatile X&, and either there are no other parameters
|
|
// or else all other parameters have default arguments (8.3.6).
|
|
// C++0x [class.copy]p3:
|
|
// A non-template constructor for class X is a move constructor if its
|
|
// first parameter is of type X&&, const X&&, volatile X&&, or
|
|
// const volatile X&&, and either there are no other parameters or else
|
|
// all other parameters have default arguments.
|
|
if (!hasOneParamOrDefaultArgs() || getPrimaryTemplate() != nullptr ||
|
|
getDescribedFunctionTemplate() != nullptr)
|
|
return false;
|
|
|
|
const ParmVarDecl *Param = getParamDecl(0);
|
|
|
|
// Do we have a reference type?
|
|
const auto *ParamRefType = Param->getType()->getAs<ReferenceType>();
|
|
if (!ParamRefType)
|
|
return false;
|
|
|
|
// Is it a reference to our class type?
|
|
ASTContext &Context = getASTContext();
|
|
|
|
CanQualType PointeeType
|
|
= Context.getCanonicalType(ParamRefType->getPointeeType());
|
|
CanQualType ClassTy
|
|
= Context.getCanonicalType(Context.getTagDeclType(getParent()));
|
|
if (PointeeType.getUnqualifiedType() != ClassTy)
|
|
return false;
|
|
|
|
// FIXME: other qualifiers?
|
|
|
|
// We have a copy or move constructor.
|
|
TypeQuals = PointeeType.getCVRQualifiers();
|
|
return true;
|
|
}
|
|
|
|
bool CXXConstructorDecl::isConvertingConstructor(bool AllowExplicit) const {
|
|
// C++ [class.conv.ctor]p1:
|
|
// A constructor declared without the function-specifier explicit
|
|
// that can be called with a single parameter specifies a
|
|
// conversion from the type of its first parameter to the type of
|
|
// its class. Such a constructor is called a converting
|
|
// constructor.
|
|
if (isExplicit() && !AllowExplicit)
|
|
return false;
|
|
|
|
// FIXME: This has nothing to do with the definition of converting
|
|
// constructor, but is convenient for how we use this function in overload
|
|
// resolution.
|
|
return getNumParams() == 0
|
|
? getType()->castAs<FunctionProtoType>()->isVariadic()
|
|
: getMinRequiredArguments() <= 1;
|
|
}
|
|
|
|
bool CXXConstructorDecl::isSpecializationCopyingObject() const {
|
|
if (!hasOneParamOrDefaultArgs() || getDescribedFunctionTemplate() != nullptr)
|
|
return false;
|
|
|
|
const ParmVarDecl *Param = getParamDecl(0);
|
|
|
|
ASTContext &Context = getASTContext();
|
|
CanQualType ParamType = Context.getCanonicalType(Param->getType());
|
|
|
|
// Is it the same as our class type?
|
|
CanQualType ClassTy
|
|
= Context.getCanonicalType(Context.getTagDeclType(getParent()));
|
|
if (ParamType.getUnqualifiedType() != ClassTy)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
void CXXDestructorDecl::anchor() {}
|
|
|
|
CXXDestructorDecl *
|
|
CXXDestructorDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
|
|
return new (C, ID) CXXDestructorDecl(
|
|
C, nullptr, SourceLocation(), DeclarationNameInfo(), QualType(), nullptr,
|
|
false, false, ConstexprSpecKind::Unspecified, nullptr);
|
|
}
|
|
|
|
CXXDestructorDecl *CXXDestructorDecl::Create(
|
|
ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
|
|
const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
|
|
bool isInline, bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind,
|
|
Expr *TrailingRequiresClause) {
|
|
assert(NameInfo.getName().getNameKind()
|
|
== DeclarationName::CXXDestructorName &&
|
|
"Name must refer to a destructor");
|
|
return new (C, RD)
|
|
CXXDestructorDecl(C, RD, StartLoc, NameInfo, T, TInfo, isInline,
|
|
isImplicitlyDeclared, ConstexprKind,
|
|
TrailingRequiresClause);
|
|
}
|
|
|
|
void CXXDestructorDecl::setOperatorDelete(FunctionDecl *OD, Expr *ThisArg) {
|
|
auto *First = cast<CXXDestructorDecl>(getFirstDecl());
|
|
if (OD && !First->OperatorDelete) {
|
|
First->OperatorDelete = OD;
|
|
First->OperatorDeleteThisArg = ThisArg;
|
|
if (auto *L = getASTMutationListener())
|
|
L->ResolvedOperatorDelete(First, OD, ThisArg);
|
|
}
|
|
}
|
|
|
|
void CXXConversionDecl::anchor() {}
|
|
|
|
CXXConversionDecl *
|
|
CXXConversionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
|
|
return new (C, ID) CXXConversionDecl(
|
|
C, nullptr, SourceLocation(), DeclarationNameInfo(), QualType(), nullptr,
|
|
false, ExplicitSpecifier(), ConstexprSpecKind::Unspecified,
|
|
SourceLocation(), nullptr);
|
|
}
|
|
|
|
CXXConversionDecl *CXXConversionDecl::Create(
|
|
ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
|
|
const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
|
|
bool isInline, ExplicitSpecifier ES, ConstexprSpecKind ConstexprKind,
|
|
SourceLocation EndLocation, Expr *TrailingRequiresClause) {
|
|
assert(NameInfo.getName().getNameKind()
|
|
== DeclarationName::CXXConversionFunctionName &&
|
|
"Name must refer to a conversion function");
|
|
return new (C, RD)
|
|
CXXConversionDecl(C, RD, StartLoc, NameInfo, T, TInfo, isInline, ES,
|
|
ConstexprKind, EndLocation, TrailingRequiresClause);
|
|
}
|
|
|
|
bool CXXConversionDecl::isLambdaToBlockPointerConversion() const {
|
|
return isImplicit() && getParent()->isLambda() &&
|
|
getConversionType()->isBlockPointerType();
|
|
}
|
|
|
|
LinkageSpecDecl::LinkageSpecDecl(DeclContext *DC, SourceLocation ExternLoc,
|
|
SourceLocation LangLoc, LanguageIDs lang,
|
|
bool HasBraces)
|
|
: Decl(LinkageSpec, DC, LangLoc), DeclContext(LinkageSpec),
|
|
ExternLoc(ExternLoc), RBraceLoc(SourceLocation()) {
|
|
setLanguage(lang);
|
|
LinkageSpecDeclBits.HasBraces = HasBraces;
|
|
}
|
|
|
|
void LinkageSpecDecl::anchor() {}
|
|
|
|
LinkageSpecDecl *LinkageSpecDecl::Create(ASTContext &C,
|
|
DeclContext *DC,
|
|
SourceLocation ExternLoc,
|
|
SourceLocation LangLoc,
|
|
LanguageIDs Lang,
|
|
bool HasBraces) {
|
|
return new (C, DC) LinkageSpecDecl(DC, ExternLoc, LangLoc, Lang, HasBraces);
|
|
}
|
|
|
|
LinkageSpecDecl *LinkageSpecDecl::CreateDeserialized(ASTContext &C,
|
|
unsigned ID) {
|
|
return new (C, ID) LinkageSpecDecl(nullptr, SourceLocation(),
|
|
SourceLocation(), lang_c, false);
|
|
}
|
|
|
|
void UsingDirectiveDecl::anchor() {}
|
|
|
|
UsingDirectiveDecl *UsingDirectiveDecl::Create(ASTContext &C, DeclContext *DC,
|
|
SourceLocation L,
|
|
SourceLocation NamespaceLoc,
|
|
NestedNameSpecifierLoc QualifierLoc,
|
|
SourceLocation IdentLoc,
|
|
NamedDecl *Used,
|
|
DeclContext *CommonAncestor) {
|
|
if (auto *NS = dyn_cast_or_null<NamespaceDecl>(Used))
|
|
Used = NS->getOriginalNamespace();
|
|
return new (C, DC) UsingDirectiveDecl(DC, L, NamespaceLoc, QualifierLoc,
|
|
IdentLoc, Used, CommonAncestor);
|
|
}
|
|
|
|
UsingDirectiveDecl *UsingDirectiveDecl::CreateDeserialized(ASTContext &C,
|
|
unsigned ID) {
|
|
return new (C, ID) UsingDirectiveDecl(nullptr, SourceLocation(),
|
|
SourceLocation(),
|
|
NestedNameSpecifierLoc(),
|
|
SourceLocation(), nullptr, nullptr);
|
|
}
|
|
|
|
NamespaceDecl *UsingDirectiveDecl::getNominatedNamespace() {
|
|
if (auto *NA = dyn_cast_or_null<NamespaceAliasDecl>(NominatedNamespace))
|
|
return NA->getNamespace();
|
|
return cast_or_null<NamespaceDecl>(NominatedNamespace);
|
|
}
|
|
|
|
NamespaceDecl::NamespaceDecl(ASTContext &C, DeclContext *DC, bool Inline,
|
|
SourceLocation StartLoc, SourceLocation IdLoc,
|
|
IdentifierInfo *Id, NamespaceDecl *PrevDecl)
|
|
: NamedDecl(Namespace, DC, IdLoc, Id), DeclContext(Namespace),
|
|
redeclarable_base(C), LocStart(StartLoc),
|
|
AnonOrFirstNamespaceAndInline(nullptr, Inline) {
|
|
setPreviousDecl(PrevDecl);
|
|
|
|
if (PrevDecl)
|
|
AnonOrFirstNamespaceAndInline.setPointer(PrevDecl->getOriginalNamespace());
|
|
}
|
|
|
|
NamespaceDecl *NamespaceDecl::Create(ASTContext &C, DeclContext *DC,
|
|
bool Inline, SourceLocation StartLoc,
|
|
SourceLocation IdLoc, IdentifierInfo *Id,
|
|
NamespaceDecl *PrevDecl) {
|
|
return new (C, DC) NamespaceDecl(C, DC, Inline, StartLoc, IdLoc, Id,
|
|
PrevDecl);
|
|
}
|
|
|
|
NamespaceDecl *NamespaceDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
|
|
return new (C, ID) NamespaceDecl(C, nullptr, false, SourceLocation(),
|
|
SourceLocation(), nullptr, nullptr);
|
|
}
|
|
|
|
NamespaceDecl *NamespaceDecl::getOriginalNamespace() {
|
|
if (isFirstDecl())
|
|
return this;
|
|
|
|
return AnonOrFirstNamespaceAndInline.getPointer();
|
|
}
|
|
|
|
const NamespaceDecl *NamespaceDecl::getOriginalNamespace() const {
|
|
if (isFirstDecl())
|
|
return this;
|
|
|
|
return AnonOrFirstNamespaceAndInline.getPointer();
|
|
}
|
|
|
|
bool NamespaceDecl::isOriginalNamespace() const { return isFirstDecl(); }
|
|
|
|
NamespaceDecl *NamespaceDecl::getNextRedeclarationImpl() {
|
|
return getNextRedeclaration();
|
|
}
|
|
|
|
NamespaceDecl *NamespaceDecl::getPreviousDeclImpl() {
|
|
return getPreviousDecl();
|
|
}
|
|
|
|
NamespaceDecl *NamespaceDecl::getMostRecentDeclImpl() {
|
|
return getMostRecentDecl();
|
|
}
|
|
|
|
void NamespaceAliasDecl::anchor() {}
|
|
|
|
NamespaceAliasDecl *NamespaceAliasDecl::getNextRedeclarationImpl() {
|
|
return getNextRedeclaration();
|
|
}
|
|
|
|
NamespaceAliasDecl *NamespaceAliasDecl::getPreviousDeclImpl() {
|
|
return getPreviousDecl();
|
|
}
|
|
|
|
NamespaceAliasDecl *NamespaceAliasDecl::getMostRecentDeclImpl() {
|
|
return getMostRecentDecl();
|
|
}
|
|
|
|
NamespaceAliasDecl *NamespaceAliasDecl::Create(ASTContext &C, DeclContext *DC,
|
|
SourceLocation UsingLoc,
|
|
SourceLocation AliasLoc,
|
|
IdentifierInfo *Alias,
|
|
NestedNameSpecifierLoc QualifierLoc,
|
|
SourceLocation IdentLoc,
|
|
NamedDecl *Namespace) {
|
|
// FIXME: Preserve the aliased namespace as written.
|
|
if (auto *NS = dyn_cast_or_null<NamespaceDecl>(Namespace))
|
|
Namespace = NS->getOriginalNamespace();
|
|
return new (C, DC) NamespaceAliasDecl(C, DC, UsingLoc, AliasLoc, Alias,
|
|
QualifierLoc, IdentLoc, Namespace);
|
|
}
|
|
|
|
NamespaceAliasDecl *
|
|
NamespaceAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
|
|
return new (C, ID) NamespaceAliasDecl(C, nullptr, SourceLocation(),
|
|
SourceLocation(), nullptr,
|
|
NestedNameSpecifierLoc(),
|
|
SourceLocation(), nullptr);
|
|
}
|
|
|
|
void LifetimeExtendedTemporaryDecl::anchor() {}
|
|
|
|
/// Retrieve the storage duration for the materialized temporary.
|
|
StorageDuration LifetimeExtendedTemporaryDecl::getStorageDuration() const {
|
|
const ValueDecl *ExtendingDecl = getExtendingDecl();
|
|
if (!ExtendingDecl)
|
|
return SD_FullExpression;
|
|
// FIXME: This is not necessarily correct for a temporary materialized
|
|
// within a default initializer.
|
|
if (isa<FieldDecl>(ExtendingDecl))
|
|
return SD_Automatic;
|
|
// FIXME: This only works because storage class specifiers are not allowed
|
|
// on decomposition declarations.
|
|
if (isa<BindingDecl>(ExtendingDecl))
|
|
return ExtendingDecl->getDeclContext()->isFunctionOrMethod() ? SD_Automatic
|
|
: SD_Static;
|
|
return cast<VarDecl>(ExtendingDecl)->getStorageDuration();
|
|
}
|
|
|
|
APValue *LifetimeExtendedTemporaryDecl::getOrCreateValue(bool MayCreate) const {
|
|
assert(getStorageDuration() == SD_Static &&
|
|
"don't need to cache the computed value for this temporary");
|
|
if (MayCreate && !Value) {
|
|
Value = (new (getASTContext()) APValue);
|
|
getASTContext().addDestruction(Value);
|
|
}
|
|
assert(Value && "may not be null");
|
|
return Value;
|
|
}
|
|
|
|
void UsingShadowDecl::anchor() {}
|
|
|
|
UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, DeclContext *DC,
|
|
SourceLocation Loc, UsingDecl *Using,
|
|
NamedDecl *Target)
|
|
: NamedDecl(K, DC, Loc, Using ? Using->getDeclName() : DeclarationName()),
|
|
redeclarable_base(C), UsingOrNextShadow(cast<NamedDecl>(Using)) {
|
|
if (Target)
|
|
setTargetDecl(Target);
|
|
setImplicit();
|
|
}
|
|
|
|
UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, EmptyShell Empty)
|
|
: NamedDecl(K, nullptr, SourceLocation(), DeclarationName()),
|
|
redeclarable_base(C) {}
|
|
|
|
UsingShadowDecl *
|
|
UsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
|
|
return new (C, ID) UsingShadowDecl(UsingShadow, C, EmptyShell());
|
|
}
|
|
|
|
UsingDecl *UsingShadowDecl::getUsingDecl() const {
|
|
const UsingShadowDecl *Shadow = this;
|
|
while (const auto *NextShadow =
|
|
dyn_cast<UsingShadowDecl>(Shadow->UsingOrNextShadow))
|
|
Shadow = NextShadow;
|
|
return cast<UsingDecl>(Shadow->UsingOrNextShadow);
|
|
}
|
|
|
|
void ConstructorUsingShadowDecl::anchor() {}
|
|
|
|
ConstructorUsingShadowDecl *
|
|
ConstructorUsingShadowDecl::Create(ASTContext &C, DeclContext *DC,
|
|
SourceLocation Loc, UsingDecl *Using,
|
|
NamedDecl *Target, bool IsVirtual) {
|
|
return new (C, DC) ConstructorUsingShadowDecl(C, DC, Loc, Using, Target,
|
|
IsVirtual);
|
|
}
|
|
|
|
ConstructorUsingShadowDecl *
|
|
ConstructorUsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
|
|
return new (C, ID) ConstructorUsingShadowDecl(C, EmptyShell());
|
|
}
|
|
|
|
CXXRecordDecl *ConstructorUsingShadowDecl::getNominatedBaseClass() const {
|
|
return getUsingDecl()->getQualifier()->getAsRecordDecl();
|
|
}
|
|
|
|
void UsingDecl::anchor() {}
|
|
|
|
void UsingDecl::addShadowDecl(UsingShadowDecl *S) {
|
|
assert(std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&
|
|
"declaration already in set");
|
|
assert(S->getUsingDecl() == this);
|
|
|
|
if (FirstUsingShadow.getPointer())
|
|
S->UsingOrNextShadow = FirstUsingShadow.getPointer();
|
|
FirstUsingShadow.setPointer(S);
|
|
}
|
|
|
|
void UsingDecl::removeShadowDecl(UsingShadowDecl *S) {
|
|
assert(std::find(shadow_begin(), shadow_end(), S) != shadow_end() &&
|
|
"declaration not in set");
|
|
assert(S->getUsingDecl() == this);
|
|
|
|
// Remove S from the shadow decl chain. This is O(n) but hopefully rare.
|
|
|
|
if (FirstUsingShadow.getPointer() == S) {
|
|
FirstUsingShadow.setPointer(
|
|
dyn_cast<UsingShadowDecl>(S->UsingOrNextShadow));
|
|
S->UsingOrNextShadow = this;
|
|
return;
|
|
}
|
|
|
|
UsingShadowDecl *Prev = FirstUsingShadow.getPointer();
|
|
while (Prev->UsingOrNextShadow != S)
|
|
Prev = cast<UsingShadowDecl>(Prev->UsingOrNextShadow);
|
|
Prev->UsingOrNextShadow = S->UsingOrNextShadow;
|
|
S->UsingOrNextShadow = this;
|
|
}
|
|
|
|
UsingDecl *UsingDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation UL,
|
|
NestedNameSpecifierLoc QualifierLoc,
|
|
const DeclarationNameInfo &NameInfo,
|
|
bool HasTypename) {
|
|
return new (C, DC) UsingDecl(DC, UL, QualifierLoc, NameInfo, HasTypename);
|
|
}
|
|
|
|
UsingDecl *UsingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
|
|
return new (C, ID) UsingDecl(nullptr, SourceLocation(),
|
|
NestedNameSpecifierLoc(), DeclarationNameInfo(),
|
|
false);
|
|
}
|
|
|
|
SourceRange UsingDecl::getSourceRange() const {
|
|
SourceLocation Begin = isAccessDeclaration()
|
|
? getQualifierLoc().getBeginLoc() : UsingLocation;
|
|
return SourceRange(Begin, getNameInfo().getEndLoc());
|
|
}
|
|
|
|
void UsingPackDecl::anchor() {}
|
|
|
|
UsingPackDecl *UsingPackDecl::Create(ASTContext &C, DeclContext *DC,
|
|
NamedDecl *InstantiatedFrom,
|
|
ArrayRef<NamedDecl *> UsingDecls) {
|
|
size_t Extra = additionalSizeToAlloc<NamedDecl *>(UsingDecls.size());
|
|
return new (C, DC, Extra) UsingPackDecl(DC, InstantiatedFrom, UsingDecls);
|
|
}
|
|
|
|
UsingPackDecl *UsingPackDecl::CreateDeserialized(ASTContext &C, unsigned ID,
|
|
unsigned NumExpansions) {
|
|
size_t Extra = additionalSizeToAlloc<NamedDecl *>(NumExpansions);
|
|
auto *Result = new (C, ID, Extra) UsingPackDecl(nullptr, nullptr, None);
|
|
Result->NumExpansions = NumExpansions;
|
|
auto *Trail = Result->getTrailingObjects<NamedDecl *>();
|
|
for (unsigned I = 0; I != NumExpansions; ++I)
|
|
new (Trail + I) NamedDecl*(nullptr);
|
|
return Result;
|
|
}
|
|
|
|
void UnresolvedUsingValueDecl::anchor() {}
|
|
|
|
UnresolvedUsingValueDecl *
|
|
UnresolvedUsingValueDecl::Create(ASTContext &C, DeclContext *DC,
|
|
SourceLocation UsingLoc,
|
|
NestedNameSpecifierLoc QualifierLoc,
|
|
const DeclarationNameInfo &NameInfo,
|
|
SourceLocation EllipsisLoc) {
|
|
return new (C, DC) UnresolvedUsingValueDecl(DC, C.DependentTy, UsingLoc,
|
|
QualifierLoc, NameInfo,
|
|
EllipsisLoc);
|
|
}
|
|
|
|
UnresolvedUsingValueDecl *
|
|
UnresolvedUsingValueDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
|
|
return new (C, ID) UnresolvedUsingValueDecl(nullptr, QualType(),
|
|
SourceLocation(),
|
|
NestedNameSpecifierLoc(),
|
|
DeclarationNameInfo(),
|
|
SourceLocation());
|
|
}
|
|
|
|
SourceRange UnresolvedUsingValueDecl::getSourceRange() const {
|
|
SourceLocation Begin = isAccessDeclaration()
|
|
? getQualifierLoc().getBeginLoc() : UsingLocation;
|
|
return SourceRange(Begin, getNameInfo().getEndLoc());
|
|
}
|
|
|
|
void UnresolvedUsingTypenameDecl::anchor() {}
|
|
|
|
UnresolvedUsingTypenameDecl *
|
|
UnresolvedUsingTypenameDecl::Create(ASTContext &C, DeclContext *DC,
|
|
SourceLocation UsingLoc,
|
|
SourceLocation TypenameLoc,
|
|
NestedNameSpecifierLoc QualifierLoc,
|
|
SourceLocation TargetNameLoc,
|
|
DeclarationName TargetName,
|
|
SourceLocation EllipsisLoc) {
|
|
return new (C, DC) UnresolvedUsingTypenameDecl(
|
|
DC, UsingLoc, TypenameLoc, QualifierLoc, TargetNameLoc,
|
|
TargetName.getAsIdentifierInfo(), EllipsisLoc);
|
|
}
|
|
|
|
UnresolvedUsingTypenameDecl *
|
|
UnresolvedUsingTypenameDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
|
|
return new (C, ID) UnresolvedUsingTypenameDecl(
|
|
nullptr, SourceLocation(), SourceLocation(), NestedNameSpecifierLoc(),
|
|
SourceLocation(), nullptr, SourceLocation());
|
|
}
|
|
|
|
void StaticAssertDecl::anchor() {}
|
|
|
|
StaticAssertDecl *StaticAssertDecl::Create(ASTContext &C, DeclContext *DC,
|
|
SourceLocation StaticAssertLoc,
|
|
Expr *AssertExpr,
|
|
StringLiteral *Message,
|
|
SourceLocation RParenLoc,
|
|
bool Failed) {
|
|
return new (C, DC) StaticAssertDecl(DC, StaticAssertLoc, AssertExpr, Message,
|
|
RParenLoc, Failed);
|
|
}
|
|
|
|
StaticAssertDecl *StaticAssertDecl::CreateDeserialized(ASTContext &C,
|
|
unsigned ID) {
|
|
return new (C, ID) StaticAssertDecl(nullptr, SourceLocation(), nullptr,
|
|
nullptr, SourceLocation(), false);
|
|
}
|
|
|
|
void BindingDecl::anchor() {}
|
|
|
|
BindingDecl *BindingDecl::Create(ASTContext &C, DeclContext *DC,
|
|
SourceLocation IdLoc, IdentifierInfo *Id) {
|
|
return new (C, DC) BindingDecl(DC, IdLoc, Id);
|
|
}
|
|
|
|
BindingDecl *BindingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
|
|
return new (C, ID) BindingDecl(nullptr, SourceLocation(), nullptr);
|
|
}
|
|
|
|
ValueDecl *BindingDecl::getDecomposedDecl() const {
|
|
ExternalASTSource *Source =
|
|
Decomp.isOffset() ? getASTContext().getExternalSource() : nullptr;
|
|
return cast_or_null<ValueDecl>(Decomp.get(Source));
|
|
}
|
|
|
|
VarDecl *BindingDecl::getHoldingVar() const {
|
|
Expr *B = getBinding();
|
|
if (!B)
|
|
return nullptr;
|
|
auto *DRE = dyn_cast<DeclRefExpr>(B->IgnoreImplicit());
|
|
if (!DRE)
|
|
return nullptr;
|
|
|
|
auto *VD = cast<VarDecl>(DRE->getDecl());
|
|
assert(VD->isImplicit() && "holding var for binding decl not implicit");
|
|
return VD;
|
|
}
|
|
|
|
void DecompositionDecl::anchor() {}
|
|
|
|
DecompositionDecl *DecompositionDecl::Create(ASTContext &C, DeclContext *DC,
|
|
SourceLocation StartLoc,
|
|
SourceLocation LSquareLoc,
|
|
QualType T, TypeSourceInfo *TInfo,
|
|
StorageClass SC,
|
|
ArrayRef<BindingDecl *> Bindings) {
|
|
size_t Extra = additionalSizeToAlloc<BindingDecl *>(Bindings.size());
|
|
return new (C, DC, Extra)
|
|
DecompositionDecl(C, DC, StartLoc, LSquareLoc, T, TInfo, SC, Bindings);
|
|
}
|
|
|
|
DecompositionDecl *DecompositionDecl::CreateDeserialized(ASTContext &C,
|
|
unsigned ID,
|
|
unsigned NumBindings) {
|
|
size_t Extra = additionalSizeToAlloc<BindingDecl *>(NumBindings);
|
|
auto *Result = new (C, ID, Extra)
|
|
DecompositionDecl(C, nullptr, SourceLocation(), SourceLocation(),
|
|
QualType(), nullptr, StorageClass(), None);
|
|
// Set up and clean out the bindings array.
|
|
Result->NumBindings = NumBindings;
|
|
auto *Trail = Result->getTrailingObjects<BindingDecl *>();
|
|
for (unsigned I = 0; I != NumBindings; ++I)
|
|
new (Trail + I) BindingDecl*(nullptr);
|
|
return Result;
|
|
}
|
|
|
|
void DecompositionDecl::printName(llvm::raw_ostream &os) const {
|
|
os << '[';
|
|
bool Comma = false;
|
|
for (const auto *B : bindings()) {
|
|
if (Comma)
|
|
os << ", ";
|
|
B->printName(os);
|
|
Comma = true;
|
|
}
|
|
os << ']';
|
|
}
|
|
|
|
void MSPropertyDecl::anchor() {}
|
|
|
|
MSPropertyDecl *MSPropertyDecl::Create(ASTContext &C, DeclContext *DC,
|
|
SourceLocation L, DeclarationName N,
|
|
QualType T, TypeSourceInfo *TInfo,
|
|
SourceLocation StartL,
|
|
IdentifierInfo *Getter,
|
|
IdentifierInfo *Setter) {
|
|
return new (C, DC) MSPropertyDecl(DC, L, N, T, TInfo, StartL, Getter, Setter);
|
|
}
|
|
|
|
MSPropertyDecl *MSPropertyDecl::CreateDeserialized(ASTContext &C,
|
|
unsigned ID) {
|
|
return new (C, ID) MSPropertyDecl(nullptr, SourceLocation(),
|
|
DeclarationName(), QualType(), nullptr,
|
|
SourceLocation(), nullptr, nullptr);
|
|
}
|
|
|
|
void MSGuidDecl::anchor() {}
|
|
|
|
MSGuidDecl::MSGuidDecl(DeclContext *DC, QualType T, Parts P)
|
|
: ValueDecl(Decl::MSGuid, DC, SourceLocation(), DeclarationName(), T),
|
|
PartVal(P), APVal() {}
|
|
|
|
MSGuidDecl *MSGuidDecl::Create(const ASTContext &C, QualType T, Parts P) {
|
|
DeclContext *DC = C.getTranslationUnitDecl();
|
|
return new (C, DC) MSGuidDecl(DC, T, P);
|
|
}
|
|
|
|
MSGuidDecl *MSGuidDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
|
|
return new (C, ID) MSGuidDecl(nullptr, QualType(), Parts());
|
|
}
|
|
|
|
void MSGuidDecl::printName(llvm::raw_ostream &OS) const {
|
|
OS << llvm::format("GUID{%08" PRIx32 "-%04" PRIx16 "-%04" PRIx16 "-",
|
|
PartVal.Part1, PartVal.Part2, PartVal.Part3);
|
|
unsigned I = 0;
|
|
for (uint8_t Byte : PartVal.Part4And5) {
|
|
OS << llvm::format("%02" PRIx8, Byte);
|
|
if (++I == 2)
|
|
OS << '-';
|
|
}
|
|
OS << '}';
|
|
}
|
|
|
|
/// Determine if T is a valid 'struct _GUID' of the shape that we expect.
|
|
static bool isValidStructGUID(ASTContext &Ctx, QualType T) {
|
|
// FIXME: We only need to check this once, not once each time we compute a
|
|
// GUID APValue.
|
|
using MatcherRef = llvm::function_ref<bool(QualType)>;
|
|
|
|
auto IsInt = [&Ctx](unsigned N) {
|
|
return [&Ctx, N](QualType T) {
|
|
return T->isUnsignedIntegerOrEnumerationType() &&
|
|
Ctx.getIntWidth(T) == N;
|
|
};
|
|
};
|
|
|
|
auto IsArray = [&Ctx](MatcherRef Elem, unsigned N) {
|
|
return [&Ctx, Elem, N](QualType T) {
|
|
const ConstantArrayType *CAT = Ctx.getAsConstantArrayType(T);
|
|
return CAT && CAT->getSize() == N && Elem(CAT->getElementType());
|
|
};
|
|
};
|
|
|
|
auto IsStruct = [](std::initializer_list<MatcherRef> Fields) {
|
|
return [Fields](QualType T) {
|
|
const RecordDecl *RD = T->getAsRecordDecl();
|
|
if (!RD || RD->isUnion())
|
|
return false;
|
|
RD = RD->getDefinition();
|
|
if (!RD)
|
|
return false;
|
|
if (auto *CXXRD = dyn_cast<CXXRecordDecl>(RD))
|
|
if (CXXRD->getNumBases())
|
|
return false;
|
|
auto MatcherIt = Fields.begin();
|
|
for (const FieldDecl *FD : RD->fields()) {
|
|
if (FD->isUnnamedBitfield()) continue;
|
|
if (FD->isBitField() || MatcherIt == Fields.end() ||
|
|
!(*MatcherIt)(FD->getType()))
|
|
return false;
|
|
++MatcherIt;
|
|
}
|
|
return MatcherIt == Fields.end();
|
|
};
|
|
};
|
|
|
|
// We expect an {i32, i16, i16, [8 x i8]}.
|
|
return IsStruct({IsInt(32), IsInt(16), IsInt(16), IsArray(IsInt(8), 8)})(T);
|
|
}
|
|
|
|
APValue &MSGuidDecl::getAsAPValue() const {
|
|
if (APVal.isAbsent() && isValidStructGUID(getASTContext(), getType())) {
|
|
using llvm::APInt;
|
|
using llvm::APSInt;
|
|
APVal = APValue(APValue::UninitStruct(), 0, 4);
|
|
APVal.getStructField(0) = APValue(APSInt(APInt(32, PartVal.Part1), true));
|
|
APVal.getStructField(1) = APValue(APSInt(APInt(16, PartVal.Part2), true));
|
|
APVal.getStructField(2) = APValue(APSInt(APInt(16, PartVal.Part3), true));
|
|
APValue &Arr = APVal.getStructField(3) =
|
|
APValue(APValue::UninitArray(), 8, 8);
|
|
for (unsigned I = 0; I != 8; ++I) {
|
|
Arr.getArrayInitializedElt(I) =
|
|
APValue(APSInt(APInt(8, PartVal.Part4And5[I]), true));
|
|
}
|
|
// Register this APValue to be destroyed if necessary. (Note that the
|
|
// MSGuidDecl destructor is never run.)
|
|
getASTContext().addDestruction(&APVal);
|
|
}
|
|
|
|
return APVal;
|
|
}
|
|
|
|
static const char *getAccessName(AccessSpecifier AS) {
|
|
switch (AS) {
|
|
case AS_none:
|
|
llvm_unreachable("Invalid access specifier!");
|
|
case AS_public:
|
|
return "public";
|
|
case AS_private:
|
|
return "private";
|
|
case AS_protected:
|
|
return "protected";
|
|
}
|
|
llvm_unreachable("Invalid access specifier!");
|
|
}
|
|
|
|
const StreamingDiagnostic &clang::operator<<(const StreamingDiagnostic &DB,
|
|
AccessSpecifier AS) {
|
|
return DB << getAccessName(AS);
|
|
}
|