/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp

Bug Summary

File:	clang/lib/AST/DeclCXX.cpp
Warning:	line 2294, column 38 Called C++ object pointer is null
Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name DeclCXX.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST -I /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/include -I /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/build-llvm/include -I /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/llvm/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/build-llvm/tools/clang/lib/AST -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2019-12-07-102640-14763-1 -x c++ /build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp
1//===- DeclCXX.cpp - C++ Declaration AST Node Implementation --------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the C++ related Decl classes.
10//
11//===----------------------------------------------------------------------===//

13#include "clang/AST/DeclCXX.h"
14#include "clang/AST/ASTContext.h"
15#include "clang/AST/ASTLambda.h"
16#include "clang/AST/ASTMutationListener.h"
17#include "clang/AST/ASTUnresolvedSet.h"
18#include "clang/AST/CXXInheritance.h"
19#include "clang/AST/DeclBase.h"
20#include "clang/AST/DeclTemplate.h"
21#include "clang/AST/DeclarationName.h"
22#include "clang/AST/Expr.h"
23#include "clang/AST/ExprCXX.h"
24#include "clang/AST/LambdaCapture.h"
25#include "clang/AST/NestedNameSpecifier.h"
26#include "clang/AST/ODRHash.h"
27#include "clang/AST/Type.h"
28#include "clang/AST/TypeLoc.h"
29#include "clang/AST/UnresolvedSet.h"
30#include "clang/Basic/Diagnostic.h"
31#include "clang/Basic/IdentifierTable.h"
32#include "clang/Basic/LLVM.h"
33#include "clang/Basic/LangOptions.h"
34#include "clang/Basic/OperatorKinds.h"
35#include "clang/Basic/PartialDiagnostic.h"
36#include "clang/Basic/SourceLocation.h"
37#include "clang/Basic/Specifiers.h"
38#include "llvm/ADT/None.h"
39#include "llvm/ADT/SmallPtrSet.h"
40#include "llvm/ADT/SmallVector.h"
41#include "llvm/ADT/iterator_range.h"
42#include "llvm/Support/Casting.h"
43#include "llvm/Support/ErrorHandling.h"
44#include "llvm/Support/raw_ostream.h"
45#include <algorithm>
46#include <cassert>
47#include <cstddef>
48#include <cstdint>

50using namespace clang;

52//===----------------------------------------------------------------------===//
53// Decl Allocation/Deallocation Method Implementations
54//===----------------------------------------------------------------------===//

56void AccessSpecDecl::anchor() {}

58AccessSpecDecl *AccessSpecDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) AccessSpecDecl(EmptyShell());
60}

62void LazyASTUnresolvedSet::getFromExternalSource(ASTContext &C) const {
ExternalASTSource *Source = C.getExternalSource();
assert(Impl.Decls.isLazy() && "getFromExternalSource for non-lazy set")((Impl.Decls.isLazy() && "getFromExternalSource for non-lazy set"
) ? static_cast<void> (0) : __assert_fail ("Impl.Decls.isLazy() && \"getFromExternalSource for non-lazy set\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 64, __PRETTY_FUNCTION__));
assert(Source && "getFromExternalSource with no external source")((Source && "getFromExternalSource with no external source"
) ? static_cast<void> (0) : __assert_fail ("Source && \"getFromExternalSource with no external source\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 65, __PRETTY_FUNCTION__));

for (ASTUnresolvedSet::iterator I = Impl.begin(); I != Impl.end(); ++I)
  I.setDecl(cast<NamedDecl>(Source->GetExternalDecl(
      reinterpret_cast<uintptr_t>(I.getDecl()) >> 2)));
Impl.Decls.setLazy(false);
71}

73CXXRecordDecl::DefinitionData::DefinitionData(CXXRecordDecl *D)
  : UserDeclaredConstructor(false), UserDeclaredSpecialMembers(0),
    Aggregate(true), PlainOldData(true), Empty(true), Polymorphic(false),
    Abstract(false), IsStandardLayout(true), IsCXX11StandardLayout(true),
    HasBasesWithFields(false), HasBasesWithNonStaticDataMembers(false),
    HasPrivateFields(false), HasProtectedFields(false),
    HasPublicFields(false), HasMutableFields(false), HasVariantMembers(false),
    HasOnlyCMembers(true), HasInClassInitializer(false),
    HasUninitializedReferenceMember(false), HasUninitializedFields(false),
    HasInheritedConstructor(false), HasInheritedAssignment(false),
    NeedOverloadResolutionForCopyConstructor(false),
    NeedOverloadResolutionForMoveConstructor(false),
    NeedOverloadResolutionForMoveAssignment(false),
    NeedOverloadResolutionForDestructor(false),
    DefaultedCopyConstructorIsDeleted(false),
    DefaultedMoveConstructorIsDeleted(false),
    DefaultedMoveAssignmentIsDeleted(false),
    DefaultedDestructorIsDeleted(false), HasTrivialSpecialMembers(SMF_All),
    HasTrivialSpecialMembersForCall(SMF_All),
    DeclaredNonTrivialSpecialMembers(0),
    DeclaredNonTrivialSpecialMembersForCall(0), HasIrrelevantDestructor(true),
    HasConstexprNonCopyMoveConstructor(false),
    HasDefaultedDefaultConstructor(false),
    DefaultedDefaultConstructorIsConstexpr(true),
    HasConstexprDefaultConstructor(false),
    DefaultedDestructorIsConstexpr(true),
    HasNonLiteralTypeFieldsOrBases(false),
    UserProvidedDefaultConstructor(false), DeclaredSpecialMembers(0),
    ImplicitCopyConstructorCanHaveConstParamForVBase(true),
    ImplicitCopyConstructorCanHaveConstParamForNonVBase(true),
    ImplicitCopyAssignmentHasConstParam(true),
    HasDeclaredCopyConstructorWithConstParam(false),
    HasDeclaredCopyAssignmentWithConstParam(false), IsLambda(false),
    IsParsingBaseSpecifiers(false), ComputedVisibleConversions(false),
    HasODRHash(false), Definition(D) {}

109CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getBasesSlowCase() const {
return Bases.get(Definition->getASTContext().getExternalSource());
111}

113CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getVBasesSlowCase() const {
return VBases.get(Definition->getASTContext().getExternalSource());
115}

117CXXRecordDecl::CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C,
                           DeclContext *DC, SourceLocation StartLoc,
                           SourceLocation IdLoc, IdentifierInfo *Id,
                           CXXRecordDecl *PrevDecl)
  : RecordDecl(K, TK, C, DC, StartLoc, IdLoc, Id, PrevDecl),
    DefinitionData(PrevDecl ? PrevDecl->DefinitionData
                            : nullptr) {}

125CXXRecordDecl *CXXRecordDecl::Create(const ASTContext &C, TagKind TK,
                                   DeclContext *DC, SourceLocation StartLoc,
                                   SourceLocation IdLoc, IdentifierInfo *Id,
                                   CXXRecordDecl *PrevDecl,
                                   bool DelayTypeCreation) {
auto *R = new (C, DC) CXXRecordDecl(CXXRecord, TK, C, DC, StartLoc, IdLoc, Id,
                                    PrevDecl);
R->setMayHaveOutOfDateDef(C.getLangOpts().Modules);

// FIXME: DelayTypeCreation seems like such a hack
if (!DelayTypeCreation)
  C.getTypeDeclType(R, PrevDecl);
return R;
138}

140CXXRecordDecl *
141CXXRecordDecl::CreateLambda(const ASTContext &C, DeclContext *DC,
                          TypeSourceInfo *Info, SourceLocation Loc,
                          bool Dependent, bool IsGeneric,
                          LambdaCaptureDefault CaptureDefault) {
auto *R = new (C, DC) CXXRecordDecl(CXXRecord, TTK_Class, C, DC, Loc, Loc,
                                    nullptr, nullptr);
R->setBeingDefined(true);
R->DefinitionData =
    new (C) struct LambdaDefinitionData(R, Info, Dependent, IsGeneric,
                                        CaptureDefault);
R->setMayHaveOutOfDateDef(false);
R->setImplicit(true);
C.getTypeDeclType(R, /*PrevDecl=*/nullptr);
return R;
155}

157CXXRecordDecl *
158CXXRecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) {
auto *R = new (C, ID) CXXRecordDecl(
    CXXRecord, TTK_Struct, C, nullptr, SourceLocation(), SourceLocation(),
    nullptr, nullptr);
R->setMayHaveOutOfDateDef(false);
return R;
164}

166/// Determine whether a class has a repeated base class. This is intended for
167/// use when determining if a class is standard-layout, so makes no attempt to
168/// handle virtual bases.
169static bool hasRepeatedBaseClass(const CXXRecordDecl *StartRD) {
llvm::SmallPtrSet<const CXXRecordDecl*, 8> SeenBaseTypes;
SmallVector<const CXXRecordDecl*, 8> WorkList = {StartRD};
while (!WorkList.empty()) {
  const CXXRecordDecl *RD = WorkList.pop_back_val();
  for (const CXXBaseSpecifier &BaseSpec : RD->bases()) {
    if (const CXXRecordDecl *B = BaseSpec.getType()->getAsCXXRecordDecl()) {
      if (!SeenBaseTypes.insert(B).second)
        return true;
      WorkList.push_back(B);
    }
  }
}
return false;
183}

185void
186CXXRecordDecl::setBases(CXXBaseSpecifier const * const *Bases,
                      unsigned NumBases) {
ASTContext &C = getASTContext();

if (!data().Bases.isOffset() && data().NumBases > 0)
  C.Deallocate(data().getBases());

if (NumBases) {
  if (!C.getLangOpts().CPlusPlus17) {
    // C++ [dcl.init.aggr]p1:
    //   An aggregate is [...] a class with [...] no base classes [...].
    data().Aggregate = false;
  }

  // C++ [class]p4:
  //   A POD-struct is an aggregate class...
  data().PlainOldData = false;
}

// The set of seen virtual base types.
llvm::SmallPtrSet<CanQualType, 8> SeenVBaseTypes;

// The virtual bases of this class.
SmallVector<const CXXBaseSpecifier *, 8> VBases;

data().Bases = new(C) CXXBaseSpecifier [NumBases];
data().NumBases = NumBases;
for (unsigned i = 0; i < NumBases; ++i) {
  data().getBases()[i] = *Bases[i];
  // Keep track of inherited vbases for this base class.
  const CXXBaseSpecifier *Base = Bases[i];
  QualType BaseType = Base->getType();
  // Skip dependent types; we can't do any checking on them now.
  if (BaseType->isDependentType())
    continue;
  auto *BaseClassDecl =
      cast<CXXRecordDecl>(BaseType->castAs<RecordType>()->getDecl());

  // 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 (BaseClassDecl->data().HasBasesWithFields ||
      !BaseClassDecl->field_empty()) {
    if (data().HasBasesWithFields)
      // Two bases have members or bit-fields: not standard-layout.
      data().IsStandardLayout = false;
    data().HasBasesWithFields = true;
  }

  // C++11 [class]p7:
  //   A standard-layout class is a class that:
  //     -- [...] has [...] at most one base class with non-static data
  //        members
  if (BaseClassDecl->data().HasBasesWithNonStaticDataMembers ||
      BaseClassDecl->hasDirectFields()) {
    if (data().HasBasesWithNonStaticDataMembers)
      data().IsCXX11StandardLayout = false;
    data().HasBasesWithNonStaticDataMembers = true;
  }

  if (!BaseClassDecl->isEmpty()) {
    // C++14 [meta.unary.prop]p4:
    //   T is a class type [...] with [...] no base class B for which
    //   is_empty<B>::value is false.
    data().Empty = false;
  }

  // C++1z [dcl.init.agg]p1:
  //   An aggregate is a class with [...] no private or protected base classes
  if (Base->getAccessSpecifier() != AS_public)
    data().Aggregate = false;

  // C++ [class.virtual]p1:
  //   A class that declares or inherits a virtual function is called a
  //   polymorphic class.
  if (BaseClassDecl->isPolymorphic()) {
    data().Polymorphic = true;

    //   An aggregate is a class with [...] no virtual functions.
    data().Aggregate = false;
  }

  // C++0x [class]p7:
  //   A standard-layout class is a class that: [...]
  //    -- has no non-standard-layout base classes
  if (!BaseClassDecl->isStandardLayout())
    data().IsStandardLayout = false;
  if (!BaseClassDecl->isCXX11StandardLayout())
    data().IsCXX11StandardLayout = false;

  // Record if this base is the first non-literal field or base.
  if (!hasNonLiteralTypeFieldsOrBases() && !BaseType->isLiteralType(C))
    data().HasNonLiteralTypeFieldsOrBases = true;

  // Now go through all virtual bases of this base and add them.
  for (const auto &VBase : BaseClassDecl->vbases()) {
    // Add this base if it's not already in the list.
    if (SeenVBaseTypes.insert(C.getCanonicalType(VBase.getType())).second) {
      VBases.push_back(&VBase);

      // C++11 [class.copy]p8:
      //   The implicitly-declared copy constructor for a class X will have
      //   the form 'X::X(const X&)' if each [...] virtual base class B of X
      //   has a copy constructor whose first parameter is of type
      //   'const B&' or 'const volatile B&' [...]
      if (CXXRecordDecl *VBaseDecl = VBase.getType()->getAsCXXRecordDecl())
        if (!VBaseDecl->hasCopyConstructorWithConstParam())
          data().ImplicitCopyConstructorCanHaveConstParamForVBase = false;

      // C++1z [dcl.init.agg]p1:
      //   An aggregate is a class with [...] no virtual base classes
      data().Aggregate = false;
    }
  }

  if (Base->isVirtual()) {
    // Add this base if it's not already in the list.
    if (SeenVBaseTypes.insert(C.getCanonicalType(BaseType)).second)
      VBases.push_back(Base);

    // C++14 [meta.unary.prop] is_empty:
    //   T is a class type, but not a union type, with ... no virtual base
    //   classes
    data().Empty = false;

    // C++1z [dcl.init.agg]p1:
    //   An aggregate is a class with [...] no virtual base classes
    data().Aggregate = false;

    // 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 base classes
    data().HasTrivialSpecialMembers &= SMF_Destructor;
    data().HasTrivialSpecialMembersForCall &= SMF_Destructor;

    // C++0x [class]p7:
    //   A standard-layout class is a class that: [...]
    //    -- has [...] no virtual base classes
    data().IsStandardLayout = false;
    data().IsCXX11StandardLayout = false;

    // C++20 [dcl.constexpr]p3:
    //   In the definition of a constexpr function [...]
    //    -- if the function is a constructor or destructor,
    //       its class shall not have any virtual base classes
    data().DefaultedDefaultConstructorIsConstexpr = false;
    data().DefaultedDestructorIsConstexpr = false;

    // C++1z [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
    //   has a copy constructor whose first parameter is of type
    //   'const B&' or 'const volatile B&' [...]
    if (!BaseClassDecl->hasCopyConstructorWithConstParam())
      data().ImplicitCopyConstructorCanHaveConstParamForVBase = false;
  } else {
    // C++ [class.ctor]p5:
    //   A default constructor is trivial [...] if:
    //    -- all the direct base classes of its class have trivial default
    //       constructors.
    if (!BaseClassDecl->hasTrivialDefaultConstructor())
      data().HasTrivialSpecialMembers &= ~SMF_DefaultConstructor;

    // C++0x [class.copy]p13:
    //   A copy/move constructor for class X is trivial if [...]
    //    [...]
    //    -- the constructor selected to copy/move each direct base class
    //       subobject is trivial, and
    if (!BaseClassDecl->hasTrivialCopyConstructor())
      data().HasTrivialSpecialMembers &= ~SMF_CopyConstructor;

    if (!BaseClassDecl->hasTrivialCopyConstructorForCall())
      data().HasTrivialSpecialMembersForCall &= ~SMF_CopyConstructor;

    // If the base class doesn't have a simple move constructor, we'll eagerly
    // declare it and perform overload resolution to determine which function
    // it actually calls. If it does have a simple move constructor, this
    // check is correct.
    if (!BaseClassDecl->hasTrivialMoveConstructor())
      data().HasTrivialSpecialMembers &= ~SMF_MoveConstructor;

    if (!BaseClassDecl->hasTrivialMoveConstructorForCall())
      data().HasTrivialSpecialMembersForCall &= ~SMF_MoveConstructor;

    // C++0x [class.copy]p27:
    //   A copy/move assignment operator for class X is trivial if [...]
    //    [...]
    //    -- the assignment operator selected to copy/move each direct base
    //       class subobject is trivial, and
    if (!BaseClassDecl->hasTrivialCopyAssignment())
      data().HasTrivialSpecialMembers &= ~SMF_CopyAssignment;
    // If the base class doesn't have a simple move assignment, we'll eagerly
    // declare it and perform overload resolution to determine which function
    // it actually calls. If it does have a simple move assignment, this
    // check is correct.
    if (!BaseClassDecl->hasTrivialMoveAssignment())
      data().HasTrivialSpecialMembers &= ~SMF_MoveAssignment;

    // C++11 [class.ctor]p6:
    //   If that user-written default constructor would satisfy the
    //   requirements of a constexpr constructor, the implicitly-defined
    //   default constructor is constexpr.
    if (!BaseClassDecl->hasConstexprDefaultConstructor())
      data().DefaultedDefaultConstructorIsConstexpr = false;

    // C++1z [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
    //   has a copy constructor whose first parameter is of type
    //   'const B&' or 'const volatile B&' [...]
    if (!BaseClassDecl->hasCopyConstructorWithConstParam())
      data().ImplicitCopyConstructorCanHaveConstParamForNonVBase = false;
  }

  // C++ [class.ctor]p3:
  //   A destructor is trivial if all the direct base classes of its class
  //   have trivial destructors.
  if (!BaseClassDecl->hasTrivialDestructor())
    data().HasTrivialSpecialMembers &= ~SMF_Destructor;

  if (!BaseClassDecl->hasTrivialDestructorForCall())
    data().HasTrivialSpecialMembersForCall &= ~SMF_Destructor;

  if (!BaseClassDecl->hasIrrelevantDestructor())
    data().HasIrrelevantDestructor = false;

  // C++11 [class.copy]p18:
  //   The implicitly-declared copy assignment operator for a class X will
  //   have the form 'X& X::operator=(const X&)' if each direct base class B
  //   of X has a copy assignment operator whose parameter is of type 'const
  //   B&', 'const volatile B&', or 'B' [...]
  if (!BaseClassDecl->hasCopyAssignmentWithConstParam())
    data().ImplicitCopyAssignmentHasConstParam = false;

  // A class has an Objective-C object member if... or any of its bases
  // has an Objective-C object member.
  if (BaseClassDecl->hasObjectMember())
    setHasObjectMember(true);

  if (BaseClassDecl->hasVolatileMember())
    setHasVolatileMember(true);

  if (BaseClassDecl->getArgPassingRestrictions() ==
      RecordDecl::APK_CanNeverPassInRegs)
    setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs);

  // Keep track of the presence of mutable fields.
  if (BaseClassDecl->hasMutableFields()) {
    data().HasMutableFields = true;
    data().NeedOverloadResolutionForCopyConstructor = true;
  }

  if (BaseClassDecl->hasUninitializedReferenceMember())
    data().HasUninitializedReferenceMember = true;

  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;
476}

478unsigned CXXRecordDecl::getODRHash() const {
assert(hasDefinition() && "ODRHash only for records with definitions")((hasDefinition() && "ODRHash only for records with definitions"
) ? static_cast<void> (0) : __assert_fail ("hasDefinition() && \"ODRHash only for records with definitions\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 479, __PRETTY_FUNCTION__));

// 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;
492}

494void 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->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;
535}

537bool CXXRecordDecl::hasConstexprDestructor() const {
auto *Dtor = getDestructor();
return Dtor ? Dtor->isConstexpr() : defaultedDestructorIsConstexpr();
540}

542bool CXXRecordDecl::hasAnyDependentBases() const {
if (!isDependentContext())
  return false;

return !forallBases([](const CXXRecordDecl *) { return true; });
547}

549bool 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;
564}

566void CXXRecordDecl::markedVirtualFunctionPure() {
// C++ [class.abstract]p2:
//   A class is abstract if it has at least one pure virtual function.
data().Abstract = true;
570}

572bool 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;
650}

652bool CXXRecordDecl::lambdaIsDefaultConstructibleAndAssignable() const {
assert(isLambda() && "not a lambda")((isLambda() && "not a lambda") ? static_cast<void
> (0) : __assert_fail ("isLambda() && \"not a lambda\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 653, __PRETTY_FUNCTION__));

// 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 || 
    getLambdaData().NumCaptures != 0)
  return false;
return getASTContext().getLangOpts().CPlusPlus2a;
669}

671void 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->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().CPlusPlus2a
          ? !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;
  }

  // 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")::llvm::llvm_unreachable_internal("Invalid access specifier",
 "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 965);
  };
  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;
    data().NeedOverloadResolutionForCopyConstructor = true;
  }

  // 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().DefaultedMoveAssignmentIsDeleted = true;
        data().DefaultedDestructorIsDeleted = true;
        data().NeedOverloadResolutionForCopyConstructor = true;
        data().NeedOverloadResolutionForMoveConstructor = 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().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().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->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().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;
        data().NeedOverloadResolutionForCopyConstructor = 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().CPlusPlus2a))
      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().DefaultedMoveAssignmentIsDeleted = true;
  }

  // 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;
}
1324}

1326void CXXRecordDecl::finishedDefaultedOrDeletedMember(CXXMethodDecl *D) {
assert(!D->isImplicit() && !D->isUserProvided())((!D->isImplicit() && !D->isUserProvided()) ? static_cast
<void> (0) : __assert_fail ("!D->isImplicit() && !D->isUserProvided()"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1327, __PRETTY_FUNCTION__));

// 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;
1360}

1362void 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;
1377}

1379bool CXXRecordDecl::isCLike() const {
if (getTagKind() == TTK_Class || getTagKind() == TTK_Interface ||
    !TemplateOrInstantiation.isNull())
  return false;
if (!hasDefinition())
  return true;

return isPOD() && data().HasOnlyCMembers;
1387}

1389bool CXXRecordDecl::isGenericLambda() const {
if (!isLambda()) return false;
return getLambdaData().IsGenericLambda;
1392}

1394#ifndef NDEBUG
1395static bool allLookupResultsAreTheSame(const DeclContext::lookup_result &R) {
for (auto *D : R)
  if (!declaresSameEntity(D, R.front()))
    return false;
return true;
1400}
1401#endif

1403static 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!")((!Calls.empty() && "Missing lambda call operator!") ?
 static_cast<void> (0) : __assert_fail ("!Calls.empty() && \"Missing lambda call operator!\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1409, __PRETTY_FUNCTION__));
assert(allLookupResultsAreTheSame(Calls) &&((allLookupResultsAreTheSame(Calls) && "More than one lambda call operator!"
) ? static_cast<void> (0) : __assert_fail ("allLookupResultsAreTheSame(Calls) && \"More than one lambda call operator!\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1411, __PRETTY_FUNCTION__))
       "More than one lambda call operator!")((allLookupResultsAreTheSame(Calls) && "More than one lambda call operator!"
) ? static_cast<void> (0) : __assert_fail ("allLookupResultsAreTheSame(Calls) && \"More than one lambda call operator!\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1411, __PRETTY_FUNCTION__));
return Calls.front();
1413}

1415FunctionTemplateDecl* CXXRecordDecl::getDependentLambdaCallOperator() const {
NamedDecl *CallOp = getLambdaCallOperatorHelper(*this);
return  dyn_cast_or_null<FunctionTemplateDecl>(CallOp);
1418}

1420CXXMethodDecl *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);
1430}

1432CXXMethodDecl* CXXRecordDecl::getLambdaStaticInvoker() const {
if (!isLambda()) return nullptr;
DeclarationName Name =
  &getASTContext().Idents.get(getLambdaStaticInvokerName());
DeclContext::lookup_result Invoker = lookup(Name);
if (Invoker.empty()) return nullptr;
assert(allLookupResultsAreTheSame(Invoker) &&((allLookupResultsAreTheSame(Invoker) && "More than one static invoker operator!"
) ? static_cast<void> (0) : __assert_fail ("allLookupResultsAreTheSame(Invoker) && \"More than one static invoker operator!\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1439, __PRETTY_FUNCTION__))
       "More than one static invoker operator!")((allLookupResultsAreTheSame(Invoker) && "More than one static invoker operator!"
) ? static_cast<void> (0) : __assert_fail ("allLookupResultsAreTheSame(Invoker) && \"More than one static invoker operator!\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1439, __PRETTY_FUNCTION__));
NamedDecl *InvokerFun = Invoker.front();
if (const auto *InvokerTemplate = dyn_cast<FunctionTemplateDecl>(InvokerFun))
  return cast<CXXMethodDecl>(InvokerTemplate->getTemplatedDecl());

return cast<CXXMethodDecl>(InvokerFun);
1445}

1447void 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())((Field == field_end()) ? static_cast<void> (0) : __assert_fail
 ("Field == field_end()", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1462, __PRETTY_FUNCTION__));
1463}

1465TemplateParameterList *
1466CXXRecordDecl::getGenericLambdaTemplateParameterList() const {
if (!isGenericLambda()) return nullptr;
CXXMethodDecl *CallOp = getLambdaCallOperator();
if (FunctionTemplateDecl *Tmpl = CallOp->getDescribedFunctionTemplate())
  return Tmpl->getTemplateParameters();
return nullptr;
1472}

1474ArrayRef<NamedDecl *>
1475CXXRecordDecl::getLambdaExplicitTemplateParameters() const {
TemplateParameterList *List = getGenericLambdaTemplateParameterList();
if (!List)
  return {};

assert(std::is_partitioned(List->begin(), List->end(),((std::is_partitioned(List->begin(), List->end(), [](const
 NamedDecl *D) { return !D->isImplicit(); }) && "Explicit template params should be ordered before implicit ones"
) ? static_cast<void> (0) : __assert_fail ("std::is_partitioned(List->begin(), List->end(), [](const NamedDecl *D) { return !D->isImplicit(); }) && \"Explicit template params should be ordered before implicit ones\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1482, __PRETTY_FUNCTION__))
                           [](const NamedDecl *D) { return !D->isImplicit(); })((std::is_partitioned(List->begin(), List->end(), [](const
 NamedDecl *D) { return !D->isImplicit(); }) && "Explicit template params should be ordered before implicit ones"
) ? static_cast<void> (0) : __assert_fail ("std::is_partitioned(List->begin(), List->end(), [](const NamedDecl *D) { return !D->isImplicit(); }) && \"Explicit template params should be ordered before implicit ones\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1482, __PRETTY_FUNCTION__))
       && "Explicit template params should be ordered before implicit ones")((std::is_partitioned(List->begin(), List->end(), [](const
 NamedDecl *D) { return !D->isImplicit(); }) && "Explicit template params should be ordered before implicit ones"
) ? static_cast<void> (0) : __assert_fail ("std::is_partitioned(List->begin(), List->end(), [](const NamedDecl *D) { return !D->isImplicit(); }) && \"Explicit template params should be ordered before implicit ones\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1482, __PRETTY_FUNCTION__));

const auto ExplicitEnd = llvm::partition_point(
    *List, [](const NamedDecl *D) { return !D->isImplicit(); });
return llvm::makeArrayRef(List->begin(), ExplicitEnd);
1487}

1489Decl *CXXRecordDecl::getLambdaContextDecl() const {
assert(isLambda() && "Not a lambda closure type!")((isLambda() && "Not a lambda closure type!") ? static_cast
<void> (0) : __assert_fail ("isLambda() && \"Not a lambda closure type!\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1490, __PRETTY_FUNCTION__));
ExternalASTSource *Source = getParentASTContext().getExternalSource();
return getLambdaData().ContextDecl.get(Source);
1493}

1495static CanQualType GetConversionType(ASTContext &Context, NamedDecl *Conv) {
QualType T =
    cast<CXXConversionDecl>(Conv->getUnderlyingDecl()->getAsFunction())
        ->getConversionType();
return Context.getCanonicalType(T);
1500}

1502/// Collect the visible conversions of a base class.
1503///
1504/// \param Record a base class of the class we're considering
1505/// \param InVirtual whether this base class is a virtual base (or a base
1506///   of a virtual base)
1507/// \param Access the access along the inheritance path to this base
1508/// \param ParentHiddenTypes the conversions provided by the inheritors
1509///   of this base
1510/// \param Output the set to which to add conversions from non-virtual bases
1511/// \param VOutput the set to which to add conversions from virtual bases
1512/// \param HiddenVBaseCs the set of conversions which were hidden in a
1513///   virtual base along some inheritance path
1514static void CollectVisibleConversions(ASTContext &Context,
                                    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 RecordType *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);
}
1573}

1575/// Collect the visible conversions of a class.
1576///
1577/// This would be extremely straightforward if it weren't for virtual
1578/// bases.  It might be worth special-casing that, really.
1579static void CollectVisibleConversions(ASTContext &Context,
                                    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 RecordType *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());
}
1618}

1620/// getVisibleConversionFunctions - get all conversion functions visible
1621/// in current class; including conversion function templates.
1622llvm::iterator_range<CXXRecordDecl::conversion_iterator>
1623CXXRecordDecl::getVisibleConversionFunctions() {
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());
1639}

1641void 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() &&((llvm::find(Convs, ConvDecl) == Convs.end() && "conversion was found multiple times in unresolved set"
) ? static_cast<void> (0) : __assert_fail ("llvm::find(Convs, ConvDecl) == Convs.end() && \"conversion was found multiple times in unresolved set\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1658, __PRETTY_FUNCTION__))
           "conversion was found multiple times in unresolved set")((llvm::find(Convs, ConvDecl) == Convs.end() && "conversion was found multiple times in unresolved set"
) ? static_cast<void> (0) : __assert_fail ("llvm::find(Convs, ConvDecl) == Convs.end() && \"conversion was found multiple times in unresolved set\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1658, __PRETTY_FUNCTION__));
    return;
  }
}

llvm_unreachable("conversion not found in set!")::llvm::llvm_unreachable_internal("conversion not found in set!"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1663);
1664}

1666CXXRecordDecl *CXXRecordDecl::getInstantiatedFromMemberClass() const {
if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
  return cast<CXXRecordDecl>(MSInfo->getInstantiatedFrom());

return nullptr;
1671}

1673MemberSpecializationInfo *CXXRecordDecl::getMemberSpecializationInfo() const {
return TemplateOrInstantiation.dyn_cast<MemberSpecializationInfo *>();
1675}

1677void
1678CXXRecordDecl::setInstantiationOfMemberClass(CXXRecordDecl *RD,
                                           TemplateSpecializationKind TSK) {
assert(TemplateOrInstantiation.isNull() &&((TemplateOrInstantiation.isNull() && "Previous template or instantiation?"
) ? static_cast<void> (0) : __assert_fail ("TemplateOrInstantiation.isNull() && \"Previous template or instantiation?\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1681, __PRETTY_FUNCTION__))
       "Previous template or instantiation?")((TemplateOrInstantiation.isNull() && "Previous template or instantiation?"
) ? static_cast<void> (0) : __assert_fail ("TemplateOrInstantiation.isNull() && \"Previous template or instantiation?\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1681, __PRETTY_FUNCTION__));
assert(!isa<ClassTemplatePartialSpecializationDecl>(this))((!isa<ClassTemplatePartialSpecializationDecl>(this)) ?
 static_cast<void> (0) : __assert_fail ("!isa<ClassTemplatePartialSpecializationDecl>(this)"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1682, __PRETTY_FUNCTION__));
TemplateOrInstantiation
  = new (getASTContext()) MemberSpecializationInfo(RD, TSK);
1685}

1687ClassTemplateDecl *CXXRecordDecl::getDescribedClassTemplate() const {
return TemplateOrInstantiation.dyn_cast<ClassTemplateDecl *>();
1689}

1691void CXXRecordDecl::setDescribedClassTemplate(ClassTemplateDecl *Template) {
TemplateOrInstantiation = Template;
1693}

1695TemplateSpecializationKind CXXRecordDecl::getTemplateSpecializationKind() const{
if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(this))
  return Spec->getSpecializationKind();

if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
  return MSInfo->getTemplateSpecializationKind();

return TSK_Undeclared;
1703}

1705void
1706CXXRecordDecl::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")::llvm::llvm_unreachable_internal("Not a class template or member class specialization"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1717);
1718}

1720const 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()) &&((!isTemplateInstantiation(this->getTemplateSpecializationKind
()) && "couldn't find pattern for class template instantiation"
) ? static_cast<void> (0) : __assert_fail ("!isTemplateInstantiation(this->getTemplateSpecializationKind()) && \"couldn't find pattern for class template instantiation\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1761, __PRETTY_FUNCTION__))
       "couldn't find pattern for class template instantiation")((!isTemplateInstantiation(this->getTemplateSpecializationKind
()) && "couldn't find pattern for class template instantiation"
) ? static_cast<void> (0) : __assert_fail ("!isTemplateInstantiation(this->getTemplateSpecializationKind()) && \"couldn't find pattern for class template instantiation\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1761, __PRETTY_FUNCTION__));
return nullptr;
1763}

1765CXXDestructorDecl *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());
1776}

1778bool 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;
1799}

1801static bool isDeclContextInNamespace(const DeclContext *DC) {
while (!DC->isTranslationUnit()) {
  if (DC->isNamespace())
    return true;
  DC = DC->getParent();
}
return false;
1808}

1810bool CXXRecordDecl::isInterfaceLike() const {
assert(hasDefinition() && "checking for interface-like without a definition")((hasDefinition() && "checking for interface-like without a definition"
) ? static_cast<void> (0) : __assert_fail ("hasDefinition() && \"checking for interface-like without a definition\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1811, __PRETTY_FUNCTION__));
// 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;
1859}

1861void CXXRecordDecl::completeDefinition() {
completeDefinition(nullptr);
1863}

1865void 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 &&((SO->second.size() > 0 && "All virtual functions have overriding virtual functions"
) ? static_cast<void> (0) : __assert_fail ("SO->second.size() > 0 && \"All virtual functions have overriding virtual functions\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1885, __PRETTY_FUNCTION__))
             "All virtual functions have overriding virtual functions")((SO->second.size() > 0 && "All virtual functions have overriding virtual functions"
) ? static_cast<void> (0) : __assert_fail ("SO->second.size() > 0 && \"All virtual functions have overriding virtual functions\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 1885, __PRETTY_FUNCTION__));

      // 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());
1904}

1906bool 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;
1919}

1921void CXXDeductionGuideDecl::anchor() {}

1923bool 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;
1936}

1938ExplicitSpecifier 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 {};
}
1949}

1951CXXDeductionGuideDecl *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);
1957}

1959CXXDeductionGuideDecl *CXXDeductionGuideDecl::CreateDeserialized(ASTContext &C,
                                                               unsigned ID) {
return new (C, ID) CXXDeductionGuideDecl(
    C, nullptr, SourceLocation(), ExplicitSpecifier(), DeclarationNameInfo(),
    QualType(), nullptr, SourceLocation());
1964}

1966void CXXMethodDecl::anchor() {}

1968bool CXXMethodDecl::isStatic() const {
const CXXMethodDecl *MD = getCanonicalDecl();

if (MD->getStorageClass() == SC_Static)
  return true;

OverloadedOperatorKind OOK = getDeclName().getCXXOverloadedOperator();
return isStaticOverloadedOperator(OOK);
1976}

1978static 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;
1987}

1989CXXMethodDecl *
1990CXXMethodDecl::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;
2018}

2020CXXMethodDecl *
2021CXXMethodDecl::getCorrespondingMethodInClass(const CXXRecordDecl *RD,
                                           bool MayBeBase) {
if (auto *MD = getCorrespondingMethodDeclaredInClass(RD, MayBeBase))
  return MD;

for (const auto &I : RD->bases()) {
  const RecordType *RT = I.getType()->getAs<RecordType>();
  if (!RT)
    continue;
  const auto *Base = cast<CXXRecordDecl>(RT->getDecl());
  CXXMethodDecl *T = this->getCorrespondingMethodInClass(Base);
  if (T)
    return T;
}

return nullptr;
2037}

2039CXXMethodDecl *CXXMethodDecl::Create(ASTContext &C, CXXRecordDecl *RD,
                                   SourceLocation StartLoc,
                                   const DeclarationNameInfo &NameInfo,
                                   QualType T, TypeSourceInfo *TInfo,
                                   StorageClass SC, bool isInline,
                                   ConstexprSpecKind ConstexprKind,
                                   SourceLocation EndLocation) {
return new (C, RD)
    CXXMethodDecl(CXXMethod, C, RD, StartLoc, NameInfo, T, TInfo, SC,
                  isInline, ConstexprKind, EndLocation);
2049}

2051CXXMethodDecl *CXXMethodDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) CXXMethodDecl(
    CXXMethod, C, nullptr, SourceLocation(), DeclarationNameInfo(),
    QualType(), nullptr, SC_None, false, CSK_unspecified, SourceLocation());
2055}

2057CXXMethodDecl *CXXMethodDecl::getDevirtualizedMethod(const Expr *Base,
                                                   bool IsAppleKext) {
assert(isVirtual() && "this method is expected to be virtual")((isVirtual() && "this method is expected to be virtual"
) ? static_cast<void> (0) : __assert_fail ("isVirtual() && \"this method is expected to be virtual\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2059, __PRETTY_FUNCTION__));

// 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 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->hasAttr<FinalAttr>())
  return DevirtualizedMethod;
if (const auto *dtor = BestDynamicDecl->getDestructor()) {
  if (dtor->hasAttr<FinalAttr>())
    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;
2139}

2141bool CXXMethodDecl::isUsualDeallocationFunction(
  SmallVectorImpl<const FunctionDecl *> &PreventedBy) const {
assert(PreventedBy.empty() && "PreventedBy is expected to be empty")((PreventedBy.empty() && "PreventedBy is expected to be empty"
) ? static_cast<void> (0) : __assert_fail ("PreventedBy.empty() && \"PreventedBy is expected to be empty\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2143, __PRETTY_FUNCTION__));
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;
2216}

2218bool 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);
2237}

2239bool 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);
2258}

2260void CXXMethodDecl::addOverriddenMethod(const CXXMethodDecl *MD) {
assert(MD->isCanonicalDecl() && "Method is not canonical!")((MD->isCanonicalDecl() && "Method is not canonical!"
) ? static_cast<void> (0) : __assert_fail ("MD->isCanonicalDecl() && \"Method is not canonical!\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2261, __PRETTY_FUNCTION__));
assert(!MD->getParent()->isDependentContext() &&((!MD->getParent()->isDependentContext() && "Can't add an overridden method to a class template!"
) ? static_cast<void> (0) : __assert_fail ("!MD->getParent()->isDependentContext() && \"Can't add an overridden method to a class template!\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2263, __PRETTY_FUNCTION__))
       "Can't add an overridden method to a class template!")((!MD->getParent()->isDependentContext() && "Can't add an overridden method to a class template!"
) ? static_cast<void> (0) : __assert_fail ("!MD->getParent()->isDependentContext() && \"Can't add an overridden method to a class template!\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2263, __PRETTY_FUNCTION__));
assert(MD->isVirtual() && "Method is not virtual!")((MD->isVirtual() && "Method is not virtual!") ? static_cast
<void> (0) : __assert_fail ("MD->isVirtual() && \"Method is not virtual!\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2264, __PRETTY_FUNCTION__));

getASTContext().addOverriddenMethod(this, MD);
2267}

2269CXXMethodDecl::method_iterator CXXMethodDecl::begin_overridden_methods() const {
if (isa<CXXConstructorDecl>(this)) return nullptr;
return getASTContext().overridden_methods_begin(this);
2272}

2274CXXMethodDecl::method_iterator CXXMethodDecl::end_overridden_methods() const {
if (isa<CXXConstructorDecl>(this)) return nullptr;
return getASTContext().overridden_methods_end(this);
2277}

2279unsigned CXXMethodDecl::size_overridden_methods() const {
if (isa<CXXConstructorDecl>(this)) return 0;
return getASTContext().overridden_methods_size(this);
2282}

2284CXXMethodDecl::overridden_method_range
2285CXXMethodDecl::overridden_methods() const {
if (isa<CXXConstructorDecl>(this))
  return overridden_method_range(nullptr, nullptr);
return getASTContext().overridden_methods(this);
2289}

2291static QualType getThisObjectType(ASTContext &C, const FunctionProtoType *FPT,
                                const CXXRecordDecl *Decl) {
QualType ClassTy = C.getTypeDeclType(Decl);
return C.getQualifiedType(ClassTy, FPT->getMethodQuals());
7
←
Called C++ object pointer is null
2295}

2297QualType CXXMethodDecl::getThisType(const FunctionProtoType *FPT,
                                  const CXXRecordDecl *Decl) {
ASTContext &C = Decl->getASTContext();
QualType ObjectTy = ::getThisObjectType(C, FPT, Decl);
return C.getPointerType(ObjectTy);
2302}

2304QualType CXXMethodDecl::getThisObjectType(const FunctionProtoType *FPT,
                                        const CXXRecordDecl *Decl) {
ASTContext &C = Decl->getASTContext();
return ::getThisObjectType(C, FPT, Decl);
5
←
Passing null pointer value via 2nd parameter 'FPT'→
6
←
Calling 'getThisObjectType'→
2308}

2310QualType 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!")((isInstance() && "No 'this' for static methods!") ? static_cast
<void> (0) : __assert_fail ("isInstance() && \"No 'this' for static methods!\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2316, __PRETTY_FUNCTION__));

return CXXMethodDecl::getThisType(getType()->getAs<FunctionProtoType>(),
                                  getParent());
2320}

2322QualType CXXMethodDecl::getThisObjectType() const {
// Ditto getThisType.
assert(isInstance() && "No 'this' for static methods!")((isInstance() && "No 'this' for static methods!") ? static_cast
<void> (0) : __assert_fail ("isInstance() && \"No 'this' for static methods!\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2324, __PRETTY_FUNCTION__));
1
'?' condition is true→

return CXXMethodDecl::getThisObjectType(getType()->getAs<FunctionProtoType>(),
2
←
Assuming the object is not a 'FunctionProtoType'→
3
←
Passing null pointer value via 1st parameter 'FPT'→
4
←
Calling 'CXXMethodDecl::getThisObjectType'→
                                        getParent());
2328}

2330bool 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());
2340}

2342bool CXXMethodDecl::isLambdaStaticInvoker() const {
const CXXRecordDecl *P = getParent();
if (P->isLambda()) {
  if (const CXXMethodDecl *StaticInvoker = P->getLambdaStaticInvoker()) {
    if (StaticInvoker == this) return true;
    if (P->isGenericLambda() && this->isFunctionTemplateSpecialization())
      return StaticInvoker == this->getPrimaryTemplate()->getTemplatedDecl();
  }
}
return false;
2352}

2354CXXCtorInitializer::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) {}

2363CXXCtorInitializer::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) {}

2372CXXCtorInitializer::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) {}

2381CXXCtorInitializer::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) {}

2388int64_t CXXCtorInitializer::getID(const ASTContext &Context) const {
return Context.getAllocator()
              .identifyKnownAlignedObject<CXXCtorInitializer>(this);
2391}

2393TypeLoc CXXCtorInitializer::getBaseClassLoc() const {
if (isBaseInitializer())
  return Initializee.get<TypeSourceInfo*>()->getTypeLoc();
else
  return {};
2398}

2400const Type *CXXCtorInitializer::getBaseClass() const {
if (isBaseInitializer())
  return Initializee.get<TypeSourceInfo*>()->getType().getTypePtr();
else
  return nullptr;
2405}

2407SourceLocation 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 {};
2418}

2420SourceRange CXXCtorInitializer::getSourceRange() const {
if (isInClassMemberInitializer()) {
  FieldDecl *D = getAnyMember();
  if (Expr *I = D->getInClassInitializer())
    return I->getSourceRange();
  return {};
}

return SourceRange(getSourceLocation(), getRParenLoc());
2429}

2431CXXConstructorDecl::CXXConstructorDecl(
  ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
  const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
  ExplicitSpecifier ES, bool isInline, bool isImplicitlyDeclared,
  ConstexprSpecKind ConstexprKind, InheritedConstructor Inherited)
  : CXXMethodDecl(CXXConstructor, C, RD, StartLoc, NameInfo, T, TInfo,
                  SC_None, isInline, ConstexprKind, SourceLocation()) {
setNumCtorInitializers(0);
setInheritingConstructor(static_cast<bool>(Inherited));
setImplicit(isImplicitlyDeclared);
CXXConstructorDeclBits.HasTrailingExplicitSpecifier = ES.getExpr() ? 1 : 0;
if (Inherited)
  *getTrailingObjects<InheritedConstructor>() = Inherited;
setExplicitSpecifier(ES);
2445}

2447void CXXConstructorDecl::anchor() {}

2449CXXConstructorDecl *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,
                       CSK_unspecified, InheritedConstructor());
Result->setInheritingConstructor(isInheritingConstructor);
Result->CXXConstructorDeclBits.HasTrailingExplicitSpecifier =
    hasTraillingExplicit;
Result->setExplicitSpecifier(ExplicitSpecifier());
return Result;
2467}

2469CXXConstructorDecl *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) {
assert(NameInfo.getName().getNameKind()((NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName
 && "Name must refer to a constructor") ? static_cast
<void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName && \"Name must refer to a constructor\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2476, __PRETTY_FUNCTION__))
       == DeclarationName::CXXConstructorName &&((NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName
 && "Name must refer to a constructor") ? static_cast
<void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName && \"Name must refer to a constructor\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2476, __PRETTY_FUNCTION__))
       "Name must refer to a constructor")((NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName
 && "Name must refer to a constructor") ? static_cast
<void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXConstructorName && \"Name must refer to a constructor\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2476, __PRETTY_FUNCTION__));
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);
2483}

2485CXXConstructorDecl::init_const_iterator CXXConstructorDecl::init_begin() const {
return CtorInitializers.get(getASTContext().getExternalSource());
2487}

2489CXXConstructorDecl *CXXConstructorDecl::getTargetConstructor() const {
assert(isDelegatingConstructor() && "Not a delegating constructor!")((isDelegatingConstructor() && "Not a delegating constructor!"
) ? static_cast<void> (0) : __assert_fail ("isDelegatingConstructor() && \"Not a delegating constructor!\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2490, __PRETTY_FUNCTION__));
Expr *E = (*init_begin())->getInit()->IgnoreImplicit();
if (const auto *Construct = dyn_cast<CXXConstructExpr>(E))
  return Construct->getConstructor();

return nullptr;
2496}

2498bool CXXConstructorDecl::isDefaultConstructor() const {
// C++ [class.ctor]p5:
//   A default constructor for a class X is a constructor of class
//   X that can be called without an argument.
return (getNumParams() == 0) ||
       (getNumParams() > 0 && getParamDecl(0)->hasDefaultArg());
2504}

2506bool
2507CXXConstructorDecl::isCopyConstructor(unsigned &TypeQuals) const {
return isCopyOrMoveConstructor(TypeQuals) &&
       getParamDecl(0)->getType()->isLValueReferenceType();
2510}

2512bool CXXConstructorDecl::isMoveConstructor(unsigned &TypeQuals) const {
return isCopyOrMoveConstructor(TypeQuals) &&
  getParamDecl(0)->getType()->isRValueReferenceType();
2515}

2517/// Determine whether this is a copy or move constructor.
2518bool 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 ((getNumParams() < 1) ||
    (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
    (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;
2557}

2559bool 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;

return (getNumParams() == 0 &&
        getType()->castAs<FunctionProtoType>()->isVariadic()) ||
       (getNumParams() == 1) ||
       (getNumParams() > 1 &&
        (getParamDecl(1)->hasDefaultArg() ||
         getParamDecl(1)->isParameterPack()));
2575}

2577bool CXXConstructorDecl::isSpecializationCopyingObject() const {
if ((getNumParams() < 1) ||
    (getNumParams() > 1 && !getParamDecl(1)->hasDefaultArg()) ||
    (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;
2595}

2597void CXXDestructorDecl::anchor() {}

2599CXXDestructorDecl *
2600CXXDestructorDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID)
    CXXDestructorDecl(C, nullptr, SourceLocation(), DeclarationNameInfo(),
                      QualType(), nullptr, false, false, CSK_unspecified);
2604}

2606CXXDestructorDecl *CXXDestructorDecl::Create(
  ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
  const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
  bool isInline, bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind) {
assert(NameInfo.getName().getNameKind()((NameInfo.getName().getNameKind() == DeclarationName::CXXDestructorName
 && "Name must refer to a destructor") ? static_cast<
void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXDestructorName && \"Name must refer to a destructor\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2612, __PRETTY_FUNCTION__))
       == DeclarationName::CXXDestructorName &&((NameInfo.getName().getNameKind() == DeclarationName::CXXDestructorName
 && "Name must refer to a destructor") ? static_cast<
void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXDestructorName && \"Name must refer to a destructor\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2612, __PRETTY_FUNCTION__))
       "Name must refer to a destructor")((NameInfo.getName().getNameKind() == DeclarationName::CXXDestructorName
 && "Name must refer to a destructor") ? static_cast<
void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXDestructorName && \"Name must refer to a destructor\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2612, __PRETTY_FUNCTION__));
return new (C, RD)
    CXXDestructorDecl(C, RD, StartLoc, NameInfo, T, TInfo, isInline,
                      isImplicitlyDeclared, ConstexprKind);
2616}

2618void 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);
}
2626}

2628void CXXConversionDecl::anchor() {}

2630CXXConversionDecl *
2631CXXConversionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) CXXConversionDecl(
    C, nullptr, SourceLocation(), DeclarationNameInfo(), QualType(), nullptr,
    false, ExplicitSpecifier(), CSK_unspecified, SourceLocation());
2635}

2637CXXConversionDecl *CXXConversionDecl::Create(
  ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
  const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
  bool isInline, ExplicitSpecifier ES, ConstexprSpecKind ConstexprKind,
  SourceLocation EndLocation) {
assert(NameInfo.getName().getNameKind()((NameInfo.getName().getNameKind() == DeclarationName::CXXConversionFunctionName
 && "Name must refer to a conversion function") ? static_cast
<void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXConversionFunctionName && \"Name must refer to a conversion function\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2644, __PRETTY_FUNCTION__))
       == DeclarationName::CXXConversionFunctionName &&((NameInfo.getName().getNameKind() == DeclarationName::CXXConversionFunctionName
 && "Name must refer to a conversion function") ? static_cast
<void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXConversionFunctionName && \"Name must refer to a conversion function\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2644, __PRETTY_FUNCTION__))
       "Name must refer to a conversion function")((NameInfo.getName().getNameKind() == DeclarationName::CXXConversionFunctionName
 && "Name must refer to a conversion function") ? static_cast
<void> (0) : __assert_fail ("NameInfo.getName().getNameKind() == DeclarationName::CXXConversionFunctionName && \"Name must refer to a conversion function\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2644, __PRETTY_FUNCTION__));
return new (C, RD)
    CXXConversionDecl(C, RD, StartLoc, NameInfo, T, TInfo, isInline, ES,
                      ConstexprKind, EndLocation);
2648}

2650bool CXXConversionDecl::isLambdaToBlockPointerConversion() const {
return isImplicit() && getParent()->isLambda() &&
       getConversionType()->isBlockPointerType();
2653}

2655LinkageSpecDecl::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;
2662}

2664void LinkageSpecDecl::anchor() {}

2666LinkageSpecDecl *LinkageSpecDecl::Create(ASTContext &C,
                                       DeclContext *DC,
                                       SourceLocation ExternLoc,
                                       SourceLocation LangLoc,
                                       LanguageIDs Lang,
                                       bool HasBraces) {
return new (C, DC) LinkageSpecDecl(DC, ExternLoc, LangLoc, Lang, HasBraces);
2673}

2675LinkageSpecDecl *LinkageSpecDecl::CreateDeserialized(ASTContext &C,
                                                   unsigned ID) {
return new (C, ID) LinkageSpecDecl(nullptr, SourceLocation(),
                                   SourceLocation(), lang_c, false);
2679}

2681void UsingDirectiveDecl::anchor() {}

2683UsingDirectiveDecl *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);
2694}

2696UsingDirectiveDecl *UsingDirectiveDecl::CreateDeserialized(ASTContext &C,
                                                         unsigned ID) {
return new (C, ID) UsingDirectiveDecl(nullptr, SourceLocation(),
                                      SourceLocation(),
                                      NestedNameSpecifierLoc(),
                                      SourceLocation(), nullptr, nullptr);
2702}

2704NamespaceDecl *UsingDirectiveDecl::getNominatedNamespace() {
if (auto *NA = dyn_cast_or_null<NamespaceAliasDecl>(NominatedNamespace))
  return NA->getNamespace();
return cast_or_null<NamespaceDecl>(NominatedNamespace);
2708}

2710NamespaceDecl::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());
2720}

2722NamespaceDecl *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);
2728}

2730NamespaceDecl *NamespaceDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) NamespaceDecl(C, nullptr, false, SourceLocation(),
                                 SourceLocation(), nullptr, nullptr);
2733}

2735NamespaceDecl *NamespaceDecl::getOriginalNamespace() {
if (isFirstDecl())
  return this;

return AnonOrFirstNamespaceAndInline.getPointer();
2740}

2742const NamespaceDecl *NamespaceDecl::getOriginalNamespace() const {
if (isFirstDecl())
  return this;

return AnonOrFirstNamespaceAndInline.getPointer();
2747}

2749bool NamespaceDecl::isOriginalNamespace() const { return isFirstDecl(); }

2751NamespaceDecl *NamespaceDecl::getNextRedeclarationImpl() {
return getNextRedeclaration();
2753}

2755NamespaceDecl *NamespaceDecl::getPreviousDeclImpl() {
return getPreviousDecl();
2757}

2759NamespaceDecl *NamespaceDecl::getMostRecentDeclImpl() {
return getMostRecentDecl();
2761}

2763void NamespaceAliasDecl::anchor() {}

2765NamespaceAliasDecl *NamespaceAliasDecl::getNextRedeclarationImpl() {
return getNextRedeclaration();
2767}

2769NamespaceAliasDecl *NamespaceAliasDecl::getPreviousDeclImpl() {
return getPreviousDecl();
2771}

2773NamespaceAliasDecl *NamespaceAliasDecl::getMostRecentDeclImpl() {
return getMostRecentDecl();
2775}

2777NamespaceAliasDecl *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);
2789}

2791NamespaceAliasDecl *
2792NamespaceAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) NamespaceAliasDecl(C, nullptr, SourceLocation(),
                                      SourceLocation(), nullptr,
                                      NestedNameSpecifierLoc(),
                                      SourceLocation(), nullptr);
2797}

2799void UsingShadowDecl::anchor() {}

2801UsingShadowDecl::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();
2809}

2811UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, EmptyShell Empty)
  : NamedDecl(K, nullptr, SourceLocation(), DeclarationName()),
    redeclarable_base(C) {}

2815UsingShadowDecl *
2816UsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) UsingShadowDecl(UsingShadow, C, EmptyShell());
2818}

2820UsingDecl *UsingShadowDecl::getUsingDecl() const {
const UsingShadowDecl *Shadow = this;
while (const auto *NextShadow =
           dyn_cast<UsingShadowDecl>(Shadow->UsingOrNextShadow))
  Shadow = NextShadow;
return cast<UsingDecl>(Shadow->UsingOrNextShadow);
2826}

2828void ConstructorUsingShadowDecl::anchor() {}

2830ConstructorUsingShadowDecl *
2831ConstructorUsingShadowDecl::Create(ASTContext &C, DeclContext *DC,
                                 SourceLocation Loc, UsingDecl *Using,
                                 NamedDecl *Target, bool IsVirtual) {
return new (C, DC) ConstructorUsingShadowDecl(C, DC, Loc, Using, Target,
                                              IsVirtual);
2836}

2838ConstructorUsingShadowDecl *
2839ConstructorUsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) ConstructorUsingShadowDecl(C, EmptyShell());
2841}

2843CXXRecordDecl *ConstructorUsingShadowDecl::getNominatedBaseClass() const {
return getUsingDecl()->getQualifier()->getAsRecordDecl();
2845}

2847void UsingDecl::anchor() {}

2849void UsingDecl::addShadowDecl(UsingShadowDecl *S) {
assert(std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&((std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&
 "declaration already in set") ? static_cast<void> (0) :
 __assert_fail ("std::find(shadow_begin(), shadow_end(), S) == shadow_end() && \"declaration already in set\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2851, __PRETTY_FUNCTION__))
       "declaration already in set")((std::find(shadow_begin(), shadow_end(), S) == shadow_end() &&
 "declaration already in set") ? static_cast<void> (0) :
 __assert_fail ("std::find(shadow_begin(), shadow_end(), S) == shadow_end() && \"declaration already in set\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2851, __PRETTY_FUNCTION__));
assert(S->getUsingDecl() == this)((S->getUsingDecl() == this) ? static_cast<void> (0)
 : __assert_fail ("S->getUsingDecl() == this", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2852, __PRETTY_FUNCTION__));

if (FirstUsingShadow.getPointer())
  S->UsingOrNextShadow = FirstUsingShadow.getPointer();
FirstUsingShadow.setPointer(S);
2857}

2859void UsingDecl::removeShadowDecl(UsingShadowDecl *S) {
assert(std::find(shadow_begin(), shadow_end(), S) != shadow_end() &&((std::find(shadow_begin(), shadow_end(), S) != shadow_end() &&
 "declaration not in set") ? static_cast<void> (0) : __assert_fail
 ("std::find(shadow_begin(), shadow_end(), S) != shadow_end() && \"declaration not in set\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2861, __PRETTY_FUNCTION__))
       "declaration not in set")((std::find(shadow_begin(), shadow_end(), S) != shadow_end() &&
 "declaration not in set") ? static_cast<void> (0) : __assert_fail
 ("std::find(shadow_begin(), shadow_end(), S) != shadow_end() && \"declaration not in set\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2861, __PRETTY_FUNCTION__));
assert(S->getUsingDecl() == this)((S->getUsingDecl() == this) ? static_cast<void> (0)
 : __assert_fail ("S->getUsingDecl() == this", "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 2862, __PRETTY_FUNCTION__));

// 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;
2878}

2880UsingDecl *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);
2885}

2887UsingDecl *UsingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) UsingDecl(nullptr, SourceLocation(),
                             NestedNameSpecifierLoc(), DeclarationNameInfo(),
                             false);
2891}

2893SourceRange UsingDecl::getSourceRange() const {
SourceLocation Begin = isAccessDeclaration()
  ? getQualifierLoc().getBeginLoc() : UsingLocation;
return SourceRange(Begin, getNameInfo().getEndLoc());
2897}

2899void UsingPackDecl::anchor() {}

2901UsingPackDecl *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);
2906}

2908UsingPackDecl *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;
2917}

2919void UnresolvedUsingValueDecl::anchor() {}

2921UnresolvedUsingValueDecl *
2922UnresolvedUsingValueDecl::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);
2930}

2932UnresolvedUsingValueDecl *
2933UnresolvedUsingValueDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) UnresolvedUsingValueDecl(nullptr, QualType(),
                                            SourceLocation(),
                                            NestedNameSpecifierLoc(),
                                            DeclarationNameInfo(),
                                            SourceLocation());
2939}

2941SourceRange UnresolvedUsingValueDecl::getSourceRange() const {
SourceLocation Begin = isAccessDeclaration()
  ? getQualifierLoc().getBeginLoc() : UsingLocation;
return SourceRange(Begin, getNameInfo().getEndLoc());
2945}

2947void UnresolvedUsingTypenameDecl::anchor() {}

2949UnresolvedUsingTypenameDecl *
2950UnresolvedUsingTypenameDecl::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);
2960}

2962UnresolvedUsingTypenameDecl *
2963UnresolvedUsingTypenameDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) UnresolvedUsingTypenameDecl(
    nullptr, SourceLocation(), SourceLocation(), NestedNameSpecifierLoc(),
    SourceLocation(), nullptr, SourceLocation());
2967}

2969void StaticAssertDecl::anchor() {}

2971StaticAssertDecl *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);
2979}

2981StaticAssertDecl *StaticAssertDecl::CreateDeserialized(ASTContext &C,
                                                     unsigned ID) {
return new (C, ID) StaticAssertDecl(nullptr, SourceLocation(), nullptr,
                                    nullptr, SourceLocation(), false);
2985}

2987void BindingDecl::anchor() {}

2989BindingDecl *BindingDecl::Create(ASTContext &C, DeclContext *DC,
                               SourceLocation IdLoc, IdentifierInfo *Id) {
return new (C, DC) BindingDecl(DC, IdLoc, Id);
2992}

2994BindingDecl *BindingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) BindingDecl(nullptr, SourceLocation(), nullptr);
2996}

2998ValueDecl *BindingDecl::getDecomposedDecl() const {
ExternalASTSource *Source =
    Decomp.isOffset() ? getASTContext().getExternalSource() : nullptr;
return cast_or_null<ValueDecl>(Decomp.get(Source));
3002}

3004VarDecl *BindingDecl::getHoldingVar() const {
Expr *B = getBinding();
if (!B)
  return nullptr;
auto *DRE = dyn_cast<DeclRefExpr>(B->IgnoreImplicit());
if (!DRE)
  return nullptr;

auto *VD = dyn_cast<VarDecl>(DRE->getDecl());
assert(VD->isImplicit() && "holding var for binding decl not implicit")((VD->isImplicit() && "holding var for binding decl not implicit"
) ? static_cast<void> (0) : __assert_fail ("VD->isImplicit() && \"holding var for binding decl not implicit\""
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 3013, __PRETTY_FUNCTION__));
return VD;
3015}

3017void DecompositionDecl::anchor() {}

3019DecompositionDecl *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);
3028}

3030DecompositionDecl *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;
3043}

3045void 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 << ']';
3055}

3057void MSPropertyDecl::anchor() {}

3059MSPropertyDecl *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);
3066}

3068MSPropertyDecl *MSPropertyDecl::CreateDeserialized(ASTContext &C,
                                                 unsigned ID) {
return new (C, ID) MSPropertyDecl(nullptr, SourceLocation(),
                                  DeclarationName(), QualType(), nullptr,
                                  SourceLocation(), nullptr, nullptr);
3073}

3075static const char *getAccessName(AccessSpecifier AS) {
switch (AS) {
  case AS_none:
    llvm_unreachable("Invalid access specifier!")::llvm::llvm_unreachable_internal("Invalid access specifier!"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 3078);
  case AS_public:
    return "public";
  case AS_private:
    return "private";
  case AS_protected:
    return "protected";
}
llvm_unreachable("Invalid access specifier!")::llvm::llvm_unreachable_internal("Invalid access specifier!"
, "/build/llvm-toolchain-snapshot-10~+201911111502510600c19528f1809/clang/lib/AST/DeclCXX.cpp"
, 3086);
3087}

3089const DiagnosticBuilder &clang::operator<<(const DiagnosticBuilder &DB,
                                         AccessSpecifier AS) {
return DB << getAccessName(AS);
3092}

3094const PartialDiagnostic &clang::operator<<(const PartialDiagnostic &DB,
                                         AccessSpecifier AS) {
return DB << getAccessName(AS);
3097}