/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp

Bug Summary

File:	tools/clang/lib/AST/DeclCXX.cpp
Warning:	line 2569, column 11 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 -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -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~svn373517/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/include -I /build/llvm-toolchain-snapshot-10~svn373517/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~svn373517/build-llvm/tools/clang/lib/AST -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~svn373517=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -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-2019-10-02-234743-9763-1 -x c++ /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp

/build/llvm-toolchain-snapshot-10~svn373517/tools/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~svn373517/tools/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~svn373517/tools/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), ComputedVisibleConversions(false),
    UserProvidedDefaultConstructor(false), DeclaredSpecialMembers(0),
    ImplicitCopyConstructorCanHaveConstParamForVBase(true),
    ImplicitCopyConstructorCanHaveConstParamForNonVBase(true),
    ImplicitCopyAssignmentHasConstParam(true),
    HasDeclaredCopyConstructorWithConstParam(false),
    HasDeclaredCopyAssignmentWithConstParam(false), IsLambda(false),
    IsParsingBaseSpecifiers(false), HasODRHash(false), Definition(D) {}

108CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getBasesSlowCase() const {
return Bases.get(Definition->getASTContext().getExternalSource());
110}

112CXXBaseSpecifier *CXXRecordDecl::DefinitionData::getVBasesSlowCase() const {
return VBases.get(Definition->getASTContext().getExternalSource());
114}

116CXXRecordDecl::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) {}

124CXXRecordDecl *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;
137}

139CXXRecordDecl *
140CXXRecordDecl::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;
154}

156CXXRecordDecl *
157CXXRecordDecl::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;
163}

165/// Determine whether a class has a repeated base class. This is intended for
166/// use when determining if a class is standard-layout, so makes no attempt to
167/// handle virtual bases.
168static 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;
182}

184void
185CXXRecordDecl::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->getAs<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 oeprator 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;
475}

477unsigned 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 478, __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;
491}

493void 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;
534}

536bool CXXRecordDecl::hasConstexprDestructor() const {
auto *Dtor = getDestructor();
return Dtor ? Dtor->isConstexpr() : defaultedDestructorIsConstexpr();
539}

541bool CXXRecordDecl::hasAnyDependentBases() const {
if (!isDependentContext())
  return false;

return !forallBases([](const CXXRecordDecl *) { return true; });
546}

548bool 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;
563}

565void CXXRecordDecl::markedVirtualFunctionPure() {
// C++ [class.abstract]p2:
//   A class is abstract if it has at least one pure virtual function.
data().Abstract = true;
569}

571bool 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;
649}

651bool 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 652, __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;
668}

670void 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 964);
  };
  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;
}
1323}

1325void 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1326, __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;
1359}

1361void 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;
1376}

1378bool CXXRecordDecl::isCLike() const {
if (getTagKind() == TTK_Class || getTagKind() == TTK_Interface ||
    !TemplateOrInstantiation.isNull())
  return false;
if (!hasDefinition())
  return true;

return isPOD() && data().HasOnlyCMembers;
1386}

1388bool CXXRecordDecl::isGenericLambda() const {
if (!isLambda()) return false;
return getLambdaData().IsGenericLambda;
1391}

1393#ifndef NDEBUG
1394static bool allLookupResultsAreTheSame(const DeclContext::lookup_result &R) {
for (auto *D : R)
  if (!declaresSameEntity(D, R.front()))
    return false;
return true;
1399}
1400#endif

1402static 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1408, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1410, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1410, __PRETTY_FUNCTION__));
return Calls.front();
1412}

1414FunctionTemplateDecl* CXXRecordDecl::getDependentLambdaCallOperator() const {
NamedDecl *CallOp = getLambdaCallOperatorHelper(*this);
return  dyn_cast_or_null<FunctionTemplateDecl>(CallOp);
1417}

1419CXXMethodDecl *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);
1429}

1431CXXMethodDecl* 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1438, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1438, __PRETTY_FUNCTION__));
NamedDecl *InvokerFun = Invoker.front();
if (const auto *InvokerTemplate = dyn_cast<FunctionTemplateDecl>(InvokerFun))
  return cast<CXXMethodDecl>(InvokerTemplate->getTemplatedDecl());

return cast<CXXMethodDecl>(InvokerFun);
1444}

1446void 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1461, __PRETTY_FUNCTION__));
1462}

1464TemplateParameterList *
1465CXXRecordDecl::getGenericLambdaTemplateParameterList() const {
if (!isGenericLambda()) return nullptr;
CXXMethodDecl *CallOp = getLambdaCallOperator();
if (FunctionTemplateDecl *Tmpl = CallOp->getDescribedFunctionTemplate())
  return Tmpl->getTemplateParameters();
return nullptr;
1471}

1473ArrayRef<NamedDecl *>
1474CXXRecordDecl::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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1481, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1481, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1481, __PRETTY_FUNCTION__));

const auto ExplicitEnd = llvm::partition_point(
    *List, [](const NamedDecl *D) { return !D->isImplicit(); });
return llvm::makeArrayRef(List->begin(), ExplicitEnd);
1486}

1488Decl *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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1489, __PRETTY_FUNCTION__));
ExternalASTSource *Source = getParentASTContext().getExternalSource();
return getLambdaData().ContextDecl.get(Source);
1492}

1494static CanQualType GetConversionType(ASTContext &Context, NamedDecl *Conv) {
QualType T =
    cast<CXXConversionDecl>(Conv->getUnderlyingDecl()->getAsFunction())
        ->getConversionType();
return Context.getCanonicalType(T);
1499}

1501/// Collect the visible conversions of a base class.
1502///
1503/// \param Record a base class of the class we're considering
1504/// \param InVirtual whether this base class is a virtual base (or a base
1505///   of a virtual base)
1506/// \param Access the access along the inheritance path to this base
1507/// \param ParentHiddenTypes the conversions provided by the inheritors
1508///   of this base
1509/// \param Output the set to which to add conversions from non-virtual bases
1510/// \param VOutput the set to which to add conversions from virtual bases
1511/// \param HiddenVBaseCs the set of conversions which were hidden in a
1512///   virtual base along some inheritance path
1513static 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);
}
1572}

1574/// Collect the visible conversions of a class.
1575///
1576/// This would be extremely straightforward if it weren't for virtual
1577/// bases.  It might be worth special-casing that, really.
1578static 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());
}
1617}

1619/// getVisibleConversionFunctions - get all conversion functions visible
1620/// in current class; including conversion function templates.
1621llvm::iterator_range<CXXRecordDecl::conversion_iterator>
1622CXXRecordDecl::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());
1638}

1640void 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1657, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1657, __PRETTY_FUNCTION__));
    return;
  }
}

llvm_unreachable("conversion not found in set!")::llvm::llvm_unreachable_internal("conversion not found in set!"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1662);
1663}

1665CXXRecordDecl *CXXRecordDecl::getInstantiatedFromMemberClass() const {
if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo())
  return cast<CXXRecordDecl>(MSInfo->getInstantiatedFrom());

return nullptr;
1670}

1672MemberSpecializationInfo *CXXRecordDecl::getMemberSpecializationInfo() const {
return TemplateOrInstantiation.dyn_cast<MemberSpecializationInfo *>();
1674}

1676void
1677CXXRecordDecl::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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1680, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1680, __PRETTY_FUNCTION__));
assert(!isa<ClassTemplatePartialSpecializationDecl>(this))((!isa<ClassTemplatePartialSpecializationDecl>(this)) ?
 static_cast<void> (0) : __assert_fail ("!isa<ClassTemplatePartialSpecializationDecl>(this)"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1681, __PRETTY_FUNCTION__));
TemplateOrInstantiation
  = new (getASTContext()) MemberSpecializationInfo(RD, TSK);
1684}

1686ClassTemplateDecl *CXXRecordDecl::getDescribedClassTemplate() const {
return TemplateOrInstantiation.dyn_cast<ClassTemplateDecl *>();
1688}

1690void CXXRecordDecl::setDescribedClassTemplate(ClassTemplateDecl *Template) {
TemplateOrInstantiation = Template;
1692}

1694TemplateSpecializationKind CXXRecordDecl::getTemplateSpecializationKind() const{
if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(this))
  return Spec->getSpecializationKind();

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

return TSK_Undeclared;
1702}

1704void
1705CXXRecordDecl::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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1716);
1717}

1719const 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1760, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1760, __PRETTY_FUNCTION__));
return nullptr;
1762}

1764CXXDestructorDecl *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());
1775}

1777bool 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;
1798}

1800static bool isDeclContextInNamespace(const DeclContext *DC) {
while (!DC->isTranslationUnit()) {
  if (DC->isNamespace())
    return true;
  DC = DC->getParent();
}
return false;
1807}

1809bool 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1810, __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;
1858}

1860void CXXRecordDecl::completeDefinition() {
completeDefinition(nullptr);
1862}

1864void 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1884, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 1884, __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());
1903}

1905bool CXXRecordDecl::mayBeAbstract() const {
if (data().Abstract || isInvalidDecl() || !data().Polymorphic ||
    isDependentContext())
  return false;

for (const auto &B : bases()) {
  const auto *BaseDecl =
      cast<CXXRecordDecl>(B.getType()->getAs<RecordType>()->getDecl());
  if (BaseDecl->isAbstract())
    return true;
}

return false;
1918}

1920void CXXDeductionGuideDecl::anchor() {}

1922bool 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;
1935}

1937ExplicitSpecifier 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 {};
}
1948}

1950CXXDeductionGuideDecl *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);
1956}

1958CXXDeductionGuideDecl *CXXDeductionGuideDecl::CreateDeserialized(ASTContext &C,
                                                               unsigned ID) {
return new (C, ID) CXXDeductionGuideDecl(
    C, nullptr, SourceLocation(), ExplicitSpecifier(), DeclarationNameInfo(),
    QualType(), nullptr, SourceLocation());
1963}

1965void CXXMethodDecl::anchor() {}

1967bool CXXMethodDecl::isStatic() const {
const CXXMethodDecl *MD = getCanonicalDecl();

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

OverloadedOperatorKind OOK = getDeclName().getCXXOverloadedOperator();
return isStaticOverloadedOperator(OOK);
1975}

1977static 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;
1986}

1988CXXMethodDecl *
1989CXXMethodDecl::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;
2017}

2019CXXMethodDecl *
2020CXXMethodDecl::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;
2036}

2038CXXMethodDecl *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);
2048}

2050CXXMethodDecl *CXXMethodDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) CXXMethodDecl(
    CXXMethod, C, nullptr, SourceLocation(), DeclarationNameInfo(),
    QualType(), nullptr, SC_None, false, CSK_unspecified, SourceLocation());
2054}

2056CXXMethodDecl *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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2058, __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;
2138}

2140bool 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2142, __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;
2215}

2217bool 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);
2236}

2238bool 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);
2257}

2259void 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2260, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2262, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2262, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2263, __PRETTY_FUNCTION__));

getASTContext().addOverriddenMethod(this, MD);
2266}

2268CXXMethodDecl::method_iterator CXXMethodDecl::begin_overridden_methods() const {
if (isa<CXXConstructorDecl>(this)) return nullptr;
return getASTContext().overridden_methods_begin(this);
2271}

2273CXXMethodDecl::method_iterator CXXMethodDecl::end_overridden_methods() const {
if (isa<CXXConstructorDecl>(this)) return nullptr;
return getASTContext().overridden_methods_end(this);
2276}

2278unsigned CXXMethodDecl::size_overridden_methods() const {
if (isa<CXXConstructorDecl>(this)) return 0;
return getASTContext().overridden_methods_size(this);
2281}

2283CXXMethodDecl::overridden_method_range
2284CXXMethodDecl::overridden_methods() const {
if (isa<CXXConstructorDecl>(this))
  return overridden_method_range(nullptr, nullptr);
return getASTContext().overridden_methods(this);
2288}

2290static QualType getThisObjectType(ASTContext &C, const FunctionProtoType *FPT,
                                const CXXRecordDecl *Decl) {
QualType ClassTy = C.getTypeDeclType(Decl);
return C.getQualifiedType(ClassTy, FPT->getMethodQuals());
2294}

2296QualType CXXMethodDecl::getThisType(const FunctionProtoType *FPT,
                                  const CXXRecordDecl *Decl) {
ASTContext &C = Decl->getASTContext();
QualType ObjectTy = ::getThisObjectType(C, FPT, Decl);
return C.getPointerType(ObjectTy);
2301}

2303QualType CXXMethodDecl::getThisObjectType(const FunctionProtoType *FPT,
                                        const CXXRecordDecl *Decl) {
ASTContext &C = Decl->getASTContext();
return ::getThisObjectType(C, FPT, Decl);
2307}

2309QualType 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2315, __PRETTY_FUNCTION__));

return CXXMethodDecl::getThisType(getType()->getAs<FunctionProtoType>(),
                                  getParent());
2319}

2321QualType 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2323, __PRETTY_FUNCTION__));

return CXXMethodDecl::getThisObjectType(getType()->getAs<FunctionProtoType>(),
                                        getParent());
2327}

2329bool 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());
2339}

2341bool 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;
2351}

2353CXXCtorInitializer::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) {}

2362CXXCtorInitializer::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) {}

2371CXXCtorInitializer::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) {}

2380CXXCtorInitializer::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) {}

2387int64_t CXXCtorInitializer::getID(const ASTContext &Context) const {
return Context.getAllocator()
              .identifyKnownAlignedObject<CXXCtorInitializer>(this);
2390}

2392TypeLoc CXXCtorInitializer::getBaseClassLoc() const {
if (isBaseInitializer())
  return Initializee.get<TypeSourceInfo*>()->getTypeLoc();
else
  return {};
2397}

2399const Type *CXXCtorInitializer::getBaseClass() const {
if (isBaseInitializer())
  return Initializee.get<TypeSourceInfo*>()->getType().getTypePtr();
else
  return nullptr;
2404}

2406SourceLocation 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 {};
2417}

2419SourceRange CXXCtorInitializer::getSourceRange() const {
if (isInClassMemberInitializer()) {
  FieldDecl *D = getAnyMember();
  if (Expr *I = D->getInClassInitializer())
    return I->getSourceRange();
  return {};
}

return SourceRange(getSourceLocation(), getRParenLoc());
2428}

2430CXXConstructorDecl::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);
2444}

2446void CXXConstructorDecl::anchor() {}

2448CXXConstructorDecl *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;
2466}

2468CXXConstructorDecl *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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2475, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2475, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2475, __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);
2482}

2484CXXConstructorDecl::init_const_iterator CXXConstructorDecl::init_begin() const {
return CtorInitializers.get(getASTContext().getExternalSource());
2486}

2488CXXConstructorDecl *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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2489, __PRETTY_FUNCTION__));
Expr *E = (*init_begin())->getInit()->IgnoreImplicit();
if (const auto *Construct = dyn_cast<CXXConstructExpr>(E))
  return Construct->getConstructor();

return nullptr;
2495}

2497bool 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());
2503}

2505bool
2506CXXConstructorDecl::isCopyConstructor(unsigned &TypeQuals) const {
return isCopyOrMoveConstructor(TypeQuals) &&
       getParamDecl(0)->getType()->isLValueReferenceType();
2509}

2511bool CXXConstructorDecl::isMoveConstructor(unsigned &TypeQuals) const {
return isCopyOrMoveConstructor(TypeQuals) &&
  getParamDecl(0)->getType()->isRValueReferenceType();
2514}

2516/// Determine whether this is a copy or move constructor.
2517bool 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;
2556}

2558bool 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)
1
Calling 'CXXConstructorDecl::isExplicit'→
6
←
Returning from 'CXXConstructorDecl::isExplicit'→
  return false;

return (getNumParams() == 0 &&
7
←
Assuming the condition is true→
        getType()->getAs<FunctionProtoType>()->isVariadic()) ||
8
←
Assuming the object is not a 'FunctionProtoType'→
9
←
Called C++ object pointer is null
       (getNumParams() == 1) ||
       (getNumParams() > 1 &&
        (getParamDecl(1)->hasDefaultArg() ||
         getParamDecl(1)->isParameterPack()));
2574}

2576bool 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;
2594}

2596void CXXDestructorDecl::anchor() {}

2598CXXDestructorDecl *
2599CXXDestructorDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID)
    CXXDestructorDecl(C, nullptr, SourceLocation(), DeclarationNameInfo(),
                      QualType(), nullptr, false, false, CSK_unspecified);
2603}

2605CXXDestructorDecl *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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2611, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2611, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2611, __PRETTY_FUNCTION__));
return new (C, RD)
    CXXDestructorDecl(C, RD, StartLoc, NameInfo, T, TInfo, isInline,
                      isImplicitlyDeclared, ConstexprKind);
2615}

2617void 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);
}
2625}

2627void CXXConversionDecl::anchor() {}

2629CXXConversionDecl *
2630CXXConversionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) CXXConversionDecl(
    C, nullptr, SourceLocation(), DeclarationNameInfo(), QualType(), nullptr,
    false, ExplicitSpecifier(), CSK_unspecified, SourceLocation());
2634}

2636CXXConversionDecl *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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2643, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2643, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2643, __PRETTY_FUNCTION__));
return new (C, RD)
    CXXConversionDecl(C, RD, StartLoc, NameInfo, T, TInfo, isInline, ES,
                      ConstexprKind, EndLocation);
2647}

2649bool CXXConversionDecl::isLambdaToBlockPointerConversion() const {
return isImplicit() && getParent()->isLambda() &&
       getConversionType()->isBlockPointerType();
2652}

2654LinkageSpecDecl::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;
2661}

2663void LinkageSpecDecl::anchor() {}

2665LinkageSpecDecl *LinkageSpecDecl::Create(ASTContext &C,
                                       DeclContext *DC,
                                       SourceLocation ExternLoc,
                                       SourceLocation LangLoc,
                                       LanguageIDs Lang,
                                       bool HasBraces) {
return new (C, DC) LinkageSpecDecl(DC, ExternLoc, LangLoc, Lang, HasBraces);
2672}

2674LinkageSpecDecl *LinkageSpecDecl::CreateDeserialized(ASTContext &C,
                                                   unsigned ID) {
return new (C, ID) LinkageSpecDecl(nullptr, SourceLocation(),
                                   SourceLocation(), lang_c, false);
2678}

2680void UsingDirectiveDecl::anchor() {}

2682UsingDirectiveDecl *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);
2693}

2695UsingDirectiveDecl *UsingDirectiveDecl::CreateDeserialized(ASTContext &C,
                                                         unsigned ID) {
return new (C, ID) UsingDirectiveDecl(nullptr, SourceLocation(),
                                      SourceLocation(),
                                      NestedNameSpecifierLoc(),
                                      SourceLocation(), nullptr, nullptr);
2701}

2703NamespaceDecl *UsingDirectiveDecl::getNominatedNamespace() {
if (auto *NA = dyn_cast_or_null<NamespaceAliasDecl>(NominatedNamespace))
  return NA->getNamespace();
return cast_or_null<NamespaceDecl>(NominatedNamespace);
2707}

2709NamespaceDecl::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());
2719}

2721NamespaceDecl *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);
2727}

2729NamespaceDecl *NamespaceDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) NamespaceDecl(C, nullptr, false, SourceLocation(),
                                 SourceLocation(), nullptr, nullptr);
2732}

2734NamespaceDecl *NamespaceDecl::getOriginalNamespace() {
if (isFirstDecl())
  return this;

return AnonOrFirstNamespaceAndInline.getPointer();
2739}

2741const NamespaceDecl *NamespaceDecl::getOriginalNamespace() const {
if (isFirstDecl())
  return this;

return AnonOrFirstNamespaceAndInline.getPointer();
2746}

2748bool NamespaceDecl::isOriginalNamespace() const { return isFirstDecl(); }

2750NamespaceDecl *NamespaceDecl::getNextRedeclarationImpl() {
return getNextRedeclaration();
2752}

2754NamespaceDecl *NamespaceDecl::getPreviousDeclImpl() {
return getPreviousDecl();
2756}

2758NamespaceDecl *NamespaceDecl::getMostRecentDeclImpl() {
return getMostRecentDecl();
2760}

2762void NamespaceAliasDecl::anchor() {}

2764NamespaceAliasDecl *NamespaceAliasDecl::getNextRedeclarationImpl() {
return getNextRedeclaration();
2766}

2768NamespaceAliasDecl *NamespaceAliasDecl::getPreviousDeclImpl() {
return getPreviousDecl();
2770}

2772NamespaceAliasDecl *NamespaceAliasDecl::getMostRecentDeclImpl() {
return getMostRecentDecl();
2774}

2776NamespaceAliasDecl *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);
2788}

2790NamespaceAliasDecl *
2791NamespaceAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) NamespaceAliasDecl(C, nullptr, SourceLocation(),
                                      SourceLocation(), nullptr,
                                      NestedNameSpecifierLoc(),
                                      SourceLocation(), nullptr);
2796}

2798void UsingShadowDecl::anchor() {}

2800UsingShadowDecl::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();
2808}

2810UsingShadowDecl::UsingShadowDecl(Kind K, ASTContext &C, EmptyShell Empty)
  : NamedDecl(K, nullptr, SourceLocation(), DeclarationName()),
    redeclarable_base(C) {}

2814UsingShadowDecl *
2815UsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) UsingShadowDecl(UsingShadow, C, EmptyShell());
2817}

2819UsingDecl *UsingShadowDecl::getUsingDecl() const {
const UsingShadowDecl *Shadow = this;
while (const auto *NextShadow =
           dyn_cast<UsingShadowDecl>(Shadow->UsingOrNextShadow))
  Shadow = NextShadow;
return cast<UsingDecl>(Shadow->UsingOrNextShadow);
2825}

2827void ConstructorUsingShadowDecl::anchor() {}

2829ConstructorUsingShadowDecl *
2830ConstructorUsingShadowDecl::Create(ASTContext &C, DeclContext *DC,
                                 SourceLocation Loc, UsingDecl *Using,
                                 NamedDecl *Target, bool IsVirtual) {
return new (C, DC) ConstructorUsingShadowDecl(C, DC, Loc, Using, Target,
                                              IsVirtual);
2835}

2837ConstructorUsingShadowDecl *
2838ConstructorUsingShadowDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) ConstructorUsingShadowDecl(C, EmptyShell());
2840}

2842CXXRecordDecl *ConstructorUsingShadowDecl::getNominatedBaseClass() const {
return getUsingDecl()->getQualifier()->getAsRecordDecl();
2844}

2846void UsingDecl::anchor() {}

2848void 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2850, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2850, __PRETTY_FUNCTION__));
assert(S->getUsingDecl() == this)((S->getUsingDecl() == this) ? static_cast<void> (0)
 : __assert_fail ("S->getUsingDecl() == this", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2851, __PRETTY_FUNCTION__));

if (FirstUsingShadow.getPointer())
  S->UsingOrNextShadow = FirstUsingShadow.getPointer();
FirstUsingShadow.setPointer(S);
2856}

2858void 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2860, __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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2860, __PRETTY_FUNCTION__));
assert(S->getUsingDecl() == this)((S->getUsingDecl() == this) ? static_cast<void> (0)
 : __assert_fail ("S->getUsingDecl() == this", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 2861, __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;
2877}

2879UsingDecl *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);
2884}

2886UsingDecl *UsingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) UsingDecl(nullptr, SourceLocation(),
                             NestedNameSpecifierLoc(), DeclarationNameInfo(),
                             false);
2890}

2892SourceRange UsingDecl::getSourceRange() const {
SourceLocation Begin = isAccessDeclaration()
  ? getQualifierLoc().getBeginLoc() : UsingLocation;
return SourceRange(Begin, getNameInfo().getEndLoc());
2896}

2898void UsingPackDecl::anchor() {}

2900UsingPackDecl *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);
2905}

2907UsingPackDecl *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;
2916}

2918void UnresolvedUsingValueDecl::anchor() {}

2920UnresolvedUsingValueDecl *
2921UnresolvedUsingValueDecl::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);
2929}

2931UnresolvedUsingValueDecl *
2932UnresolvedUsingValueDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) UnresolvedUsingValueDecl(nullptr, QualType(),
                                            SourceLocation(),
                                            NestedNameSpecifierLoc(),
                                            DeclarationNameInfo(),
                                            SourceLocation());
2938}

2940SourceRange UnresolvedUsingValueDecl::getSourceRange() const {
SourceLocation Begin = isAccessDeclaration()
  ? getQualifierLoc().getBeginLoc() : UsingLocation;
return SourceRange(Begin, getNameInfo().getEndLoc());
2944}

2946void UnresolvedUsingTypenameDecl::anchor() {}

2948UnresolvedUsingTypenameDecl *
2949UnresolvedUsingTypenameDecl::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);
2959}

2961UnresolvedUsingTypenameDecl *
2962UnresolvedUsingTypenameDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) UnresolvedUsingTypenameDecl(
    nullptr, SourceLocation(), SourceLocation(), NestedNameSpecifierLoc(),
    SourceLocation(), nullptr, SourceLocation());
2966}

2968void StaticAssertDecl::anchor() {}

2970StaticAssertDecl *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);
2978}

2980StaticAssertDecl *StaticAssertDecl::CreateDeserialized(ASTContext &C,
                                                     unsigned ID) {
return new (C, ID) StaticAssertDecl(nullptr, SourceLocation(), nullptr,
                                    nullptr, SourceLocation(), false);
2984}

2986void BindingDecl::anchor() {}

2988BindingDecl *BindingDecl::Create(ASTContext &C, DeclContext *DC,
                               SourceLocation IdLoc, IdentifierInfo *Id) {
return new (C, DC) BindingDecl(DC, IdLoc, Id);
2991}

2993BindingDecl *BindingDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) BindingDecl(nullptr, SourceLocation(), nullptr);
2995}

2997ValueDecl *BindingDecl::getDecomposedDecl() const {
ExternalASTSource *Source =
    Decomp.isOffset() ? getASTContext().getExternalSource() : nullptr;
return cast_or_null<ValueDecl>(Decomp.get(Source));
3001}

3003VarDecl *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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 3012, __PRETTY_FUNCTION__));
return VD;
3014}

3016void DecompositionDecl::anchor() {}

3018DecompositionDecl *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);
3027}

3029DecompositionDecl *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;
3042}

3044void 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 << ']';
3054}

3056void MSPropertyDecl::anchor() {}

3058MSPropertyDecl *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);
3065}

3067MSPropertyDecl *MSPropertyDecl::CreateDeserialized(ASTContext &C,
                                                 unsigned ID) {
return new (C, ID) MSPropertyDecl(nullptr, SourceLocation(),
                                  DeclarationName(), QualType(), nullptr,
                                  SourceLocation(), nullptr, nullptr);
3072}

3074static 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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 3077);
  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~svn373517/tools/clang/lib/AST/DeclCXX.cpp"
, 3085);
3086}

3088const DiagnosticBuilder &clang::operator<<(const DiagnosticBuilder &DB,
                                         AccessSpecifier AS) {
return DB << getAccessName(AS);
3091}

3093const PartialDiagnostic &clang::operator<<(const PartialDiagnostic &DB,
                                         AccessSpecifier AS) {
return DB << getAccessName(AS);
3096}

←

/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h

1//===- DeclCXX.h - Classes for representing C++ declarations --*- C++ -*-=====//
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/// \file
10/// Defines the C++ Decl subclasses, other than those for templates
11/// (found in DeclTemplate.h) and friends (in DeclFriend.h).
12//
13//===----------------------------------------------------------------------===//

15#ifndef LLVM_CLANG_AST_DECLCXX_H
16#define LLVM_CLANG_AST_DECLCXX_H

18#include "clang/AST/ASTContext.h"
19#include "clang/AST/ASTUnresolvedSet.h"
20#include "clang/AST/Attr.h"
21#include "clang/AST/Decl.h"
22#include "clang/AST/DeclBase.h"
23#include "clang/AST/DeclarationName.h"
24#include "clang/AST/Expr.h"
25#include "clang/AST/ExternalASTSource.h"
26#include "clang/AST/LambdaCapture.h"
27#include "clang/AST/NestedNameSpecifier.h"
28#include "clang/AST/Redeclarable.h"
29#include "clang/AST/Stmt.h"
30#include "clang/AST/Type.h"
31#include "clang/AST/TypeLoc.h"
32#include "clang/AST/UnresolvedSet.h"
33#include "clang/Basic/LLVM.h"
34#include "clang/Basic/Lambda.h"
35#include "clang/Basic/LangOptions.h"
36#include "clang/Basic/OperatorKinds.h"
37#include "clang/Basic/SourceLocation.h"
38#include "clang/Basic/Specifiers.h"
39#include "llvm/ADT/ArrayRef.h"
40#include "llvm/ADT/DenseMap.h"
41#include "llvm/ADT/PointerIntPair.h"
42#include "llvm/ADT/PointerUnion.h"
43#include "llvm/ADT/STLExtras.h"
44#include "llvm/ADT/iterator_range.h"
45#include "llvm/BinaryFormat/Dwarf.h"
46#include "llvm/Support/Casting.h"
47#include "llvm/Support/Compiler.h"
48#include "llvm/Support/PointerLikeTypeTraits.h"
49#include "llvm/Support/TrailingObjects.h"
50#include <cassert>
51#include <cstddef>
52#include <iterator>
53#include <memory>
54#include <vector>

56namespace clang {

58class ClassTemplateDecl;
59class ConstructorUsingShadowDecl;
60class CXXBasePath;
61class CXXBasePaths;
62class CXXConstructorDecl;
63class CXXDestructorDecl;
64class CXXFinalOverriderMap;
65class CXXIndirectPrimaryBaseSet;
66class CXXMethodDecl;
67class DecompositionDecl;
68class DiagnosticBuilder;
69class FriendDecl;
70class FunctionTemplateDecl;
71class IdentifierInfo;
72class MemberSpecializationInfo;
73class TemplateDecl;
74class TemplateParameterList;
75class UsingDecl;

77/// Represents an access specifier followed by colon ':'.
78///
79/// An objects of this class represents sugar for the syntactic occurrence
80/// of an access specifier followed by a colon in the list of member
81/// specifiers of a C++ class definition.
82///
83/// Note that they do not represent other uses of access specifiers,
84/// such as those occurring in a list of base specifiers.
85/// Also note that this class has nothing to do with so-called
86/// "access declarations" (C++98 11.3 [class.access.dcl]).
87class AccessSpecDecl : public Decl {
/// The location of the ':'.
SourceLocation ColonLoc;

AccessSpecDecl(AccessSpecifier AS, DeclContext *DC,
               SourceLocation ASLoc, SourceLocation ColonLoc)
  : Decl(AccessSpec, DC, ASLoc), ColonLoc(ColonLoc) {
  setAccess(AS);
}

AccessSpecDecl(EmptyShell Empty) : Decl(AccessSpec, Empty) {}

virtual void anchor();

101public:
/// The location of the access specifier.
SourceLocation getAccessSpecifierLoc() const { return getLocation(); }

/// Sets the location of the access specifier.
void setAccessSpecifierLoc(SourceLocation ASLoc) { setLocation(ASLoc); }

/// The location of the colon following the access specifier.
SourceLocation getColonLoc() const { return ColonLoc; }

/// Sets the location of the colon.
void setColonLoc(SourceLocation CLoc) { ColonLoc = CLoc; }

SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) {
  return SourceRange(getAccessSpecifierLoc(), getColonLoc());
}

static AccessSpecDecl *Create(ASTContext &C, AccessSpecifier AS,
                              DeclContext *DC, SourceLocation ASLoc,
                              SourceLocation ColonLoc) {
  return new (C, DC) AccessSpecDecl(AS, DC, ASLoc, ColonLoc);
}

static AccessSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID);

// Implement isa/cast/dyncast/etc.
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == AccessSpec; }
129};

131/// Represents a base class of a C++ class.
132///
133/// Each CXXBaseSpecifier represents a single, direct base class (or
134/// struct) of a C++ class (or struct). It specifies the type of that
135/// base class, whether it is a virtual or non-virtual base, and what
136/// level of access (public, protected, private) is used for the
137/// derivation. For example:
138///
139/// \code
140///   class A { };
141///   class B { };
142///   class C : public virtual A, protected B { };
143/// \endcode
144///
145/// In this code, C will have two CXXBaseSpecifiers, one for "public
146/// virtual A" and the other for "protected B".
147class CXXBaseSpecifier {
/// The source code range that covers the full base
/// specifier, including the "virtual" (if present) and access
/// specifier (if present).
SourceRange Range;

/// The source location of the ellipsis, if this is a pack
/// expansion.
SourceLocation EllipsisLoc;

/// Whether this is a virtual base class or not.
unsigned Virtual : 1;

/// Whether this is the base of a class (true) or of a struct (false).
///
/// This determines the mapping from the access specifier as written in the
/// source code to the access specifier used for semantic analysis.
unsigned BaseOfClass : 1;

/// Access specifier as written in the source code (may be AS_none).
///
/// The actual type of data stored here is an AccessSpecifier, but we use
/// "unsigned" here to work around a VC++ bug.
unsigned Access : 2;

/// Whether the class contains a using declaration
/// to inherit the named class's constructors.
unsigned InheritConstructors : 1;

/// The type of the base class.
///
/// This will be a class or struct (or a typedef of such). The source code
/// range does not include the \c virtual or the access specifier.
TypeSourceInfo *BaseTypeInfo;

182public:
CXXBaseSpecifier() = default;
CXXBaseSpecifier(SourceRange R, bool V, bool BC, AccessSpecifier A,
                 TypeSourceInfo *TInfo, SourceLocation EllipsisLoc)
  : Range(R), EllipsisLoc(EllipsisLoc), Virtual(V), BaseOfClass(BC),
    Access(A), InheritConstructors(false), BaseTypeInfo(TInfo) {}

/// Retrieves the source range that contains the entire base specifier.
SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { return Range; }
SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getBegin(); }
SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getEnd(); }

/// Get the location at which the base class type was written.
SourceLocation getBaseTypeLoc() const LLVM_READONLY__attribute__((__pure__)) {
  return BaseTypeInfo->getTypeLoc().getBeginLoc();
}

/// Determines whether the base class is a virtual base class (or not).
bool isVirtual() const { return Virtual; }

/// Determine whether this base class is a base of a class declared
/// with the 'class' keyword (vs. one declared with the 'struct' keyword).
bool isBaseOfClass() const { return BaseOfClass; }

/// Determine whether this base specifier is a pack expansion.
bool isPackExpansion() const { return EllipsisLoc.isValid(); }

/// Determine whether this base class's constructors get inherited.
bool getInheritConstructors() const { return InheritConstructors; }

/// Set that this base class's constructors should be inherited.
void setInheritConstructors(bool Inherit = true) {
  InheritConstructors = Inherit;
}

/// For a pack expansion, determine the location of the ellipsis.
SourceLocation getEllipsisLoc() const {
  return EllipsisLoc;
}

/// Returns the access specifier for this base specifier.
///
/// This is the actual base specifier as used for semantic analysis, so
/// the result can never be AS_none. To retrieve the access specifier as
/// written in the source code, use getAccessSpecifierAsWritten().
AccessSpecifier getAccessSpecifier() const {
  if ((AccessSpecifier)Access == AS_none)
    return BaseOfClass? AS_private : AS_public;
  else
    return (AccessSpecifier)Access;
}

/// Retrieves the access specifier as written in the source code
/// (which may mean that no access specifier was explicitly written).
///
/// Use getAccessSpecifier() to retrieve the access specifier for use in
/// semantic analysis.
AccessSpecifier getAccessSpecifierAsWritten() const {
  return (AccessSpecifier)Access;
}

/// Retrieves the type of the base class.
///
/// This type will always be an unqualified class type.
QualType getType() const {
  return BaseTypeInfo->getType().getUnqualifiedType();
}

/// Retrieves the type and source location of the base class.
TypeSourceInfo *getTypeSourceInfo() const { return BaseTypeInfo; }
252};

254/// Represents a C++ struct/union/class.
255class CXXRecordDecl : public RecordDecl {
friend class ASTDeclReader;
friend class ASTDeclWriter;
friend class ASTNodeImporter;
friend class ASTReader;
friend class ASTRecordWriter;
friend class ASTWriter;
friend class DeclContext;
friend class LambdaExpr;

friend void FunctionDecl::setPure(bool);
friend void TagDecl::startDefinition();

/// Values used in DefinitionData fields to represent special members.
enum SpecialMemberFlags {
  SMF_DefaultConstructor = 0x1,
  SMF_CopyConstructor = 0x2,
  SMF_MoveConstructor = 0x4,
  SMF_CopyAssignment = 0x8,
  SMF_MoveAssignment = 0x10,
  SMF_Destructor = 0x20,
  SMF_All = 0x3f
};

struct DefinitionData {
  /// True if this class has any user-declared constructors.
  unsigned UserDeclaredConstructor : 1;

  /// The user-declared special members which this class has.
  unsigned UserDeclaredSpecialMembers : 6;

  /// True when this class is an aggregate.
  unsigned Aggregate : 1;

  /// True when this class is a POD-type.
  unsigned PlainOldData : 1;

  /// True when this class is empty for traits purposes, that is:
  ///  * has no data members other than 0-width bit-fields and empty fields
  ///    marked [[no_unique_address]]
  ///  * has no virtual function/base, and
  ///  * doesn't inherit from a non-empty class.
  /// Doesn't take union-ness into account.
  unsigned Empty : 1;

  /// True when this class is polymorphic, i.e., has at
  /// least one virtual member or derives from a polymorphic class.
  unsigned Polymorphic : 1;

  /// True when this class is abstract, i.e., has at least
  /// one pure virtual function, (that can come from a base class).
  unsigned Abstract : 1;

  /// True when this class is standard-layout, per the applicable
  /// language rules (including DRs).
  unsigned IsStandardLayout : 1;

  /// True when this class was standard-layout under the C++11
  /// definition.
  ///
  /// C++11 [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) or reference,
  /// * has no virtual functions (10.3) and no virtual base classes (10.1),
  /// * has the same access control (Clause 11) for all non-static data
  ///   members
  /// * has no non-standard-layout base classes,
  /// * either has no non-static data members in the most derived class and at
  ///   most one base class with non-static data members, or has no base
  ///   classes with non-static data members, and
  /// * has no base classes of the same type as the first non-static data
  ///   member.
  unsigned IsCXX11StandardLayout : 1;

  /// True when any base class has any declared non-static data
  /// members or bit-fields.
  /// This is a helper bit of state used to implement IsStandardLayout more
  /// efficiently.
  unsigned HasBasesWithFields : 1;

  /// True when any base class has any declared non-static data
  /// members.
  /// This is a helper bit of state used to implement IsCXX11StandardLayout
  /// more efficiently.
  unsigned HasBasesWithNonStaticDataMembers : 1;

  /// True when there are private non-static data members.
  unsigned HasPrivateFields : 1;

  /// True when there are protected non-static data members.
  unsigned HasProtectedFields : 1;

  /// True when there are private non-static data members.
  unsigned HasPublicFields : 1;

  /// True if this class (or any subobject) has mutable fields.
  unsigned HasMutableFields : 1;

  /// True if this class (or any nested anonymous struct or union)
  /// has variant members.
  unsigned HasVariantMembers : 1;

  /// True if there no non-field members declared by the user.
  unsigned HasOnlyCMembers : 1;

  /// True if any field has an in-class initializer, including those
  /// within anonymous unions or structs.
  unsigned HasInClassInitializer : 1;

  /// True if any field is of reference type, and does not have an
  /// in-class initializer.
  ///
  /// In this case, value-initialization of this class is illegal in C++98
  /// even if the class has a trivial default constructor.
  unsigned HasUninitializedReferenceMember : 1;

  /// True if any non-mutable field whose type doesn't have a user-
  /// provided default ctor also doesn't have an in-class initializer.
  unsigned HasUninitializedFields : 1;

  /// True if there are any member using-declarations that inherit
  /// constructors from a base class.
  unsigned HasInheritedConstructor : 1;

  /// True if there are any member using-declarations named
  /// 'operator='.
  unsigned HasInheritedAssignment : 1;

  /// These flags are \c true if a defaulted corresponding special
  /// member can't be fully analyzed without performing overload resolution.
  /// @{
  unsigned NeedOverloadResolutionForCopyConstructor : 1;
  unsigned NeedOverloadResolutionForMoveConstructor : 1;
  unsigned NeedOverloadResolutionForMoveAssignment : 1;
  unsigned NeedOverloadResolutionForDestructor : 1;
  /// @}

  /// These flags are \c true if an implicit defaulted corresponding
  /// special member would be defined as deleted.
  /// @{
  unsigned DefaultedCopyConstructorIsDeleted : 1;
  unsigned DefaultedMoveConstructorIsDeleted : 1;
  unsigned DefaultedMoveAssignmentIsDeleted : 1;
  unsigned DefaultedDestructorIsDeleted : 1;
  /// @}

  /// The trivial special members which this class has, per
  /// C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25,
  /// C++11 [class.dtor]p5, or would have if the member were not suppressed.
  ///
  /// This excludes any user-declared but not user-provided special members
  /// which have been declared but not yet defined.
  unsigned HasTrivialSpecialMembers : 6;

  /// These bits keep track of the triviality of special functions for the
  /// purpose of calls. Only the bits corresponding to SMF_CopyConstructor,
  /// SMF_MoveConstructor, and SMF_Destructor are meaningful here.
  unsigned HasTrivialSpecialMembersForCall : 6;

  /// The declared special members of this class which are known to be
  /// non-trivial.
  ///
  /// This excludes any user-declared but not user-provided special members
  /// which have been declared but not yet defined, and any implicit special
  /// members which have not yet been declared.
  unsigned DeclaredNonTrivialSpecialMembers : 6;

  /// These bits keep track of the declared special members that are
  /// non-trivial for the purpose of calls.
  /// Only the bits corresponding to SMF_CopyConstructor,
  /// SMF_MoveConstructor, and SMF_Destructor are meaningful here.
  unsigned DeclaredNonTrivialSpecialMembersForCall : 6;

  /// True when this class has a destructor with no semantic effect.
  unsigned HasIrrelevantDestructor : 1;

  /// True when this class has at least one user-declared constexpr
  /// constructor which is neither the copy nor move constructor.
  unsigned HasConstexprNonCopyMoveConstructor : 1;

  /// True if this class has a (possibly implicit) defaulted default
  /// constructor.
  unsigned HasDefaultedDefaultConstructor : 1;

  /// True if a defaulted default constructor for this class would
  /// be constexpr.
  unsigned DefaultedDefaultConstructorIsConstexpr : 1;

  /// True if this class has a constexpr default constructor.
  ///
  /// This is true for either a user-declared constexpr default constructor
  /// or an implicitly declared constexpr default constructor.
  unsigned HasConstexprDefaultConstructor : 1;

  /// True if a defaulted destructor for this class would be constexpr.
  unsigned DefaultedDestructorIsConstexpr : 1;

  /// True when this class contains at least one non-static data
  /// member or base class of non-literal or volatile type.
  unsigned HasNonLiteralTypeFieldsOrBases : 1;

  /// True when visible conversion functions are already computed
  /// and are available.
  unsigned ComputedVisibleConversions : 1;

  /// Whether we have a C++11 user-provided default constructor (not
  /// explicitly deleted or defaulted).
  unsigned UserProvidedDefaultConstructor : 1;

  /// The special members which have been declared for this class,
  /// either by the user or implicitly.
  unsigned DeclaredSpecialMembers : 6;

  /// Whether an implicit copy constructor could have a const-qualified
  /// parameter, for initializing virtual bases and for other subobjects.
  unsigned ImplicitCopyConstructorCanHaveConstParamForVBase : 1;
  unsigned ImplicitCopyConstructorCanHaveConstParamForNonVBase : 1;

  /// Whether an implicit copy assignment operator would have a
  /// const-qualified parameter.
  unsigned ImplicitCopyAssignmentHasConstParam : 1;

  /// Whether any declared copy constructor has a const-qualified
  /// parameter.
  unsigned HasDeclaredCopyConstructorWithConstParam : 1;

  /// Whether any declared copy assignment operator has either a
  /// const-qualified reference parameter or a non-reference parameter.
  unsigned HasDeclaredCopyAssignmentWithConstParam : 1;

  /// Whether this class describes a C++ lambda.
  unsigned IsLambda : 1;

  /// Whether we are currently parsing base specifiers.
  unsigned IsParsingBaseSpecifiers : 1;

  unsigned HasODRHash : 1;

  /// A hash of parts of the class to help in ODR checking.
  unsigned ODRHash = 0;

  /// The number of base class specifiers in Bases.
  unsigned NumBases = 0;

  /// The number of virtual base class specifiers in VBases.
  unsigned NumVBases = 0;

  /// Base classes of this class.
  ///
  /// FIXME: This is wasted space for a union.
  LazyCXXBaseSpecifiersPtr Bases;

  /// direct and indirect virtual base classes of this class.
  LazyCXXBaseSpecifiersPtr VBases;

  /// The conversion functions of this C++ class (but not its
  /// inherited conversion functions).
  ///
  /// Each of the entries in this overload set is a CXXConversionDecl.
  LazyASTUnresolvedSet Conversions;

  /// The conversion functions of this C++ class and all those
  /// inherited conversion functions that are visible in this class.
  ///
  /// Each of the entries in this overload set is a CXXConversionDecl or a
  /// FunctionTemplateDecl.
  LazyASTUnresolvedSet VisibleConversions;

  /// The declaration which defines this record.
  CXXRecordDecl *Definition;

  /// The first friend declaration in this class, or null if there
  /// aren't any.
  ///
  /// This is actually currently stored in reverse order.
  LazyDeclPtr FirstFriend;

  DefinitionData(CXXRecordDecl *D);

  /// Retrieve the set of direct base classes.
  CXXBaseSpecifier *getBases() const {
    if (!Bases.isOffset())
      return Bases.get(nullptr);
    return getBasesSlowCase();
  }

  /// Retrieve the set of virtual base classes.
  CXXBaseSpecifier *getVBases() const {
    if (!VBases.isOffset())
      return VBases.get(nullptr);
    return getVBasesSlowCase();
  }

  ArrayRef<CXXBaseSpecifier> bases() const {
    return llvm::makeArrayRef(getBases(), NumBases);
  }

  ArrayRef<CXXBaseSpecifier> vbases() const {
    return llvm::makeArrayRef(getVBases(), NumVBases);
  }

private:
  CXXBaseSpecifier *getBasesSlowCase() const;
  CXXBaseSpecifier *getVBasesSlowCase() const;
};

struct DefinitionData *DefinitionData;

/// Describes a C++ closure type (generated by a lambda expression).
struct LambdaDefinitionData : public DefinitionData {
  using Capture = LambdaCapture;

  /// Whether this lambda is known to be dependent, even if its
  /// context isn't dependent.
  ///
  /// A lambda with a non-dependent context can be dependent if it occurs
  /// within the default argument of a function template, because the
  /// lambda will have been created with the enclosing context as its
  /// declaration context, rather than function. This is an unfortunate
  /// artifact of having to parse the default arguments before.
  unsigned Dependent : 1;

  /// Whether this lambda is a generic lambda.
  unsigned IsGenericLambda : 1;

  /// The Default Capture.
  unsigned CaptureDefault : 2;

  /// The number of captures in this lambda is limited 2^NumCaptures.
  unsigned NumCaptures : 15;

  /// The number of explicit captures in this lambda.
  unsigned NumExplicitCaptures : 13;

  /// The number used to indicate this lambda expression for name
  /// mangling in the Itanium C++ ABI.
  unsigned ManglingNumber = 0;

  /// The declaration that provides context for this lambda, if the
  /// actual DeclContext does not suffice. This is used for lambdas that
  /// occur within default arguments of function parameters within the class
  /// or within a data member initializer.
  LazyDeclPtr ContextDecl;

  /// The list of captures, both explicit and implicit, for this
  /// lambda.
  Capture *Captures = nullptr;

  /// The type of the call method.
  TypeSourceInfo *MethodTyInfo;

  LambdaDefinitionData(CXXRecordDecl *D, TypeSourceInfo *Info,
                       bool Dependent, bool IsGeneric,
                       LambdaCaptureDefault CaptureDefault)
    : DefinitionData(D), Dependent(Dependent), IsGenericLambda(IsGeneric),
      CaptureDefault(CaptureDefault), NumCaptures(0), NumExplicitCaptures(0),
      MethodTyInfo(Info) {
    IsLambda = true;

    // C++1z [expr.prim.lambda]p4:
    //   This class type is not an aggregate type.
    Aggregate = false;
    PlainOldData = false;
  }
};

struct DefinitionData *dataPtr() const {
  // Complete the redecl chain (if necessary).
  getMostRecentDecl();
  return DefinitionData;
}

struct DefinitionData &data() const {
  auto *DD = dataPtr();
  assert(DD && "queried property of class with no definition")((DD && "queried property of class with no definition"
) ? static_cast<void> (0) : __assert_fail ("DD && \"queried property of class with no definition\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 629, __PRETTY_FUNCTION__));
  return *DD;
}

struct LambdaDefinitionData &getLambdaData() const {
  // No update required: a merged definition cannot change any lambda
  // properties.
  auto *DD = DefinitionData;
  assert(DD && DD->IsLambda && "queried lambda property of non-lambda class")((DD && DD->IsLambda && "queried lambda property of non-lambda class"
) ? static_cast<void> (0) : __assert_fail ("DD && DD->IsLambda && \"queried lambda property of non-lambda class\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 637, __PRETTY_FUNCTION__));
  return static_cast<LambdaDefinitionData&>(*DD);
}

/// The template or declaration that this declaration
/// describes or was instantiated from, respectively.
///
/// For non-templates, this value will be null. For record
/// declarations that describe a class template, this will be a
/// pointer to a ClassTemplateDecl. For member
/// classes of class template specializations, this will be the
/// MemberSpecializationInfo referring to the member class that was
/// instantiated or specialized.
llvm::PointerUnion<ClassTemplateDecl *, MemberSpecializationInfo *>
    TemplateOrInstantiation;

/// Called from setBases and addedMember to notify the class that a
/// direct or virtual base class or a member of class type has been added.
void addedClassSubobject(CXXRecordDecl *Base);

/// Notify the class that member has been added.
///
/// This routine helps maintain information about the class based on which
/// members have been added. It will be invoked by DeclContext::addDecl()
/// whenever a member is added to this record.
void addedMember(Decl *D);

void markedVirtualFunctionPure();

/// Get the head of our list of friend declarations, possibly
/// deserializing the friends from an external AST source.
FriendDecl *getFirstFriend() const;

/// Determine whether this class has an empty base class subobject of type X
/// or of one of the types that might be at offset 0 within X (per the C++
/// "standard layout" rules).
bool hasSubobjectAtOffsetZeroOfEmptyBaseType(ASTContext &Ctx,
                                             const CXXRecordDecl *X);

676protected:
CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C, DeclContext *DC,
              SourceLocation StartLoc, SourceLocation IdLoc,
              IdentifierInfo *Id, CXXRecordDecl *PrevDecl);

681public:
/// Iterator that traverses the base classes of a class.
using base_class_iterator = CXXBaseSpecifier *;

/// Iterator that traverses the base classes of a class.
using base_class_const_iterator = const CXXBaseSpecifier *;

CXXRecordDecl *getCanonicalDecl() override {
  return cast<CXXRecordDecl>(RecordDecl::getCanonicalDecl());
}

const CXXRecordDecl *getCanonicalDecl() const {
  return const_cast<CXXRecordDecl*>(this)->getCanonicalDecl();
}

CXXRecordDecl *getPreviousDecl() {
  return cast_or_null<CXXRecordDecl>(
          static_cast<RecordDecl *>(this)->getPreviousDecl());
}

const CXXRecordDecl *getPreviousDecl() const {
  return const_cast<CXXRecordDecl*>(this)->getPreviousDecl();
}

CXXRecordDecl *getMostRecentDecl() {
  return cast<CXXRecordDecl>(
          static_cast<RecordDecl *>(this)->getMostRecentDecl());
}

const CXXRecordDecl *getMostRecentDecl() const {
  return const_cast<CXXRecordDecl*>(this)->getMostRecentDecl();
}

CXXRecordDecl *getMostRecentNonInjectedDecl() {
  CXXRecordDecl *Recent =
      static_cast<CXXRecordDecl *>(this)->getMostRecentDecl();
  while (Recent->isInjectedClassName()) {
    // FIXME: Does injected class name need to be in the redeclarations chain?
    assert(Recent->getPreviousDecl())((Recent->getPreviousDecl()) ? static_cast<void> (0)
 : __assert_fail ("Recent->getPreviousDecl()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 719, __PRETTY_FUNCTION__));
    Recent = Recent->getPreviousDecl();
  }
  return Recent;
}

const CXXRecordDecl *getMostRecentNonInjectedDecl() const {
  return const_cast<CXXRecordDecl*>(this)->getMostRecentNonInjectedDecl();
}

CXXRecordDecl *getDefinition() const {
  // We only need an update if we don't already know which
  // declaration is the definition.
  auto *DD = DefinitionData ? DefinitionData : dataPtr();
  return DD ? DD->Definition : nullptr;
}

bool hasDefinition() const { return DefinitionData || dataPtr(); }

static CXXRecordDecl *Create(const ASTContext &C, TagKind TK, DeclContext *DC,
                             SourceLocation StartLoc, SourceLocation IdLoc,
                             IdentifierInfo *Id,
                             CXXRecordDecl *PrevDecl = nullptr,
                             bool DelayTypeCreation = false);
static CXXRecordDecl *CreateLambda(const ASTContext &C, DeclContext *DC,
                                   TypeSourceInfo *Info, SourceLocation Loc,
                                   bool DependentLambda, bool IsGeneric,
                                   LambdaCaptureDefault CaptureDefault);
static CXXRecordDecl *CreateDeserialized(const ASTContext &C, unsigned ID);

bool isDynamicClass() const {
  return data().Polymorphic || data().NumVBases != 0;
}

/// @returns true if class is dynamic or might be dynamic because the
/// definition is incomplete of dependent.
bool mayBeDynamicClass() const {
  return !hasDefinition() || isDynamicClass() || hasAnyDependentBases();
}

/// @returns true if class is non dynamic or might be non dynamic because the
/// definition is incomplete of dependent.
bool mayBeNonDynamicClass() const {
  return !hasDefinition() || !isDynamicClass() || hasAnyDependentBases();
}

void setIsParsingBaseSpecifiers() { data().IsParsingBaseSpecifiers = true; }

bool isParsingBaseSpecifiers() const {
  return data().IsParsingBaseSpecifiers;
}

unsigned getODRHash() const;

/// Sets the base classes of this struct or class.
void setBases(CXXBaseSpecifier const * const *Bases, unsigned NumBases);

/// Retrieves the number of base classes of this class.
unsigned getNumBases() const { return data().NumBases; }

using base_class_range = llvm::iterator_range<base_class_iterator>;
using base_class_const_range =
    llvm::iterator_range<base_class_const_iterator>;

base_class_range bases() {
  return base_class_range(bases_begin(), bases_end());
}
base_class_const_range bases() const {
  return base_class_const_range(bases_begin(), bases_end());
}

base_class_iterator bases_begin() { return data().getBases(); }
base_class_const_iterator bases_begin() const { return data().getBases(); }
base_class_iterator bases_end() { return bases_begin() + data().NumBases; }
base_class_const_iterator bases_end() const {
  return bases_begin() + data().NumBases;
}

/// Retrieves the number of virtual base classes of this class.
unsigned getNumVBases() const { return data().NumVBases; }

base_class_range vbases() {
  return base_class_range(vbases_begin(), vbases_end());
}
base_class_const_range vbases() const {
  return base_class_const_range(vbases_begin(), vbases_end());
}

base_class_iterator vbases_begin() { return data().getVBases(); }
base_class_const_iterator vbases_begin() const { return data().getVBases(); }
base_class_iterator vbases_end() { return vbases_begin() + data().NumVBases; }
base_class_const_iterator vbases_end() const {
  return vbases_begin() + data().NumVBases;
}

/// Determine whether this class has any dependent base classes which
/// are not the current instantiation.
bool hasAnyDependentBases() const;

/// Iterator access to method members.  The method iterator visits
/// all method members of the class, including non-instance methods,
/// special methods, etc.
using method_iterator = specific_decl_iterator<CXXMethodDecl>;
using method_range =
    llvm::iterator_range<specific_decl_iterator<CXXMethodDecl>>;

method_range methods() const {
  return method_range(method_begin(), method_end());
}

/// Method begin iterator.  Iterates in the order the methods
/// were declared.
method_iterator method_begin() const {
  return method_iterator(decls_begin());
}

/// Method past-the-end iterator.
method_iterator method_end() const {
  return method_iterator(decls_end());
}

/// Iterator access to constructor members.
using ctor_iterator = specific_decl_iterator<CXXConstructorDecl>;
using ctor_range =
    llvm::iterator_range<specific_decl_iterator<CXXConstructorDecl>>;

ctor_range ctors() const { return ctor_range(ctor_begin(), ctor_end()); }

ctor_iterator ctor_begin() const {
  return ctor_iterator(decls_begin());
}

ctor_iterator ctor_end() const {
  return ctor_iterator(decls_end());
}

/// An iterator over friend declarations.  All of these are defined
/// in DeclFriend.h.
class friend_iterator;
using friend_range = llvm::iterator_range<friend_iterator>;

friend_range friends() const;
friend_iterator friend_begin() const;
friend_iterator friend_end() const;
void pushFriendDecl(FriendDecl *FD);

/// Determines whether this record has any friends.
bool hasFriends() const {
  return data().FirstFriend.isValid();
}

/// \c true if a defaulted copy constructor for this class would be
/// deleted.
bool defaultedCopyConstructorIsDeleted() const {
  assert((!needsOverloadResolutionForCopyConstructor() ||(((!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers
 & SMF_CopyConstructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 875, __PRETTY_FUNCTION__))
          (data().DeclaredSpecialMembers & SMF_CopyConstructor)) &&(((!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers
 & SMF_CopyConstructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 875, __PRETTY_FUNCTION__))
         "this property has not yet been computed by Sema")(((!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers
 & SMF_CopyConstructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 875, __PRETTY_FUNCTION__));
  return data().DefaultedCopyConstructorIsDeleted;
}

/// \c true if a defaulted move constructor for this class would be
/// deleted.
bool defaultedMoveConstructorIsDeleted() const {
  assert((!needsOverloadResolutionForMoveConstructor() ||(((!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers
 & SMF_MoveConstructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 884, __PRETTY_FUNCTION__))
          (data().DeclaredSpecialMembers & SMF_MoveConstructor)) &&(((!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers
 & SMF_MoveConstructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 884, __PRETTY_FUNCTION__))
         "this property has not yet been computed by Sema")(((!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers
 & SMF_MoveConstructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 884, __PRETTY_FUNCTION__));
  return data().DefaultedMoveConstructorIsDeleted;
}

/// \c true if a defaulted destructor for this class would be deleted.
bool defaultedDestructorIsDeleted() const {
  assert((!needsOverloadResolutionForDestructor() ||(((!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers
 & SMF_Destructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 892, __PRETTY_FUNCTION__))
          (data().DeclaredSpecialMembers & SMF_Destructor)) &&(((!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers
 & SMF_Destructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 892, __PRETTY_FUNCTION__))
         "this property has not yet been computed by Sema")(((!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers
 & SMF_Destructor)) && "this property has not yet been computed by Sema"
) ? static_cast<void> (0) : __assert_fail ("(!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && \"this property has not yet been computed by Sema\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 892, __PRETTY_FUNCTION__));
  return data().DefaultedDestructorIsDeleted;
}

/// \c true if we know for sure that this class has a single,
/// accessible, unambiguous copy constructor that is not deleted.
bool hasSimpleCopyConstructor() const {
  return !hasUserDeclaredCopyConstructor() &&
         !data().DefaultedCopyConstructorIsDeleted;
}

/// \c true if we know for sure that this class has a single,
/// accessible, unambiguous move constructor that is not deleted.
bool hasSimpleMoveConstructor() const {
  return !hasUserDeclaredMoveConstructor() && hasMoveConstructor() &&
         !data().DefaultedMoveConstructorIsDeleted;
}

/// \c true if we know for sure that this class has a single,
/// accessible, unambiguous move assignment operator that is not deleted.
bool hasSimpleMoveAssignment() const {
  return !hasUserDeclaredMoveAssignment() && hasMoveAssignment() &&
         !data().DefaultedMoveAssignmentIsDeleted;
}

/// \c true if we know for sure that this class has an accessible
/// destructor that is not deleted.
bool hasSimpleDestructor() const {
  return !hasUserDeclaredDestructor() &&
         !data().DefaultedDestructorIsDeleted;
}

/// Determine whether this class has any default constructors.
bool hasDefaultConstructor() const {
  return (data().DeclaredSpecialMembers & SMF_DefaultConstructor) ||
         needsImplicitDefaultConstructor();
}

/// Determine if we need to declare a default constructor for
/// this class.
///
/// This value is used for lazy creation of default constructors.
bool needsImplicitDefaultConstructor() const {
  return !data().UserDeclaredConstructor &&
         !(data().DeclaredSpecialMembers & SMF_DefaultConstructor) &&
         (!isLambda() || lambdaIsDefaultConstructibleAndAssignable());
}

/// Determine whether this class has any user-declared constructors.
///
/// When true, a default constructor will not be implicitly declared.
bool hasUserDeclaredConstructor() const {
  return data().UserDeclaredConstructor;
}

/// Whether this class has a user-provided default constructor
/// per C++11.
bool hasUserProvidedDefaultConstructor() const {
  return data().UserProvidedDefaultConstructor;
}

/// Determine whether this class has a user-declared copy constructor.
///
/// When false, a copy constructor will be implicitly declared.
bool hasUserDeclaredCopyConstructor() const {
  return data().UserDeclaredSpecialMembers & SMF_CopyConstructor;
}

/// Determine whether this class needs an implicit copy
/// constructor to be lazily declared.
bool needsImplicitCopyConstructor() const {
  return !(data().DeclaredSpecialMembers & SMF_CopyConstructor);
}

/// Determine whether we need to eagerly declare a defaulted copy
/// constructor for this class.
bool needsOverloadResolutionForCopyConstructor() const {
  // C++17 [class.copy.ctor]p6:
  //   If the class definition declares a move constructor or move assignment
  //   operator, the implicitly declared copy constructor is defined as
  //   deleted.
  // In MSVC mode, sometimes a declared move assignment does not delete an
  // implicit copy constructor, so defer this choice to Sema.
  if (data().UserDeclaredSpecialMembers &
      (SMF_MoveConstructor | SMF_MoveAssignment))
    return true;
  return data().NeedOverloadResolutionForCopyConstructor;
}

/// Determine whether an implicit copy constructor for this type
/// would have a parameter with a const-qualified reference type.
bool implicitCopyConstructorHasConstParam() const {
  return data().ImplicitCopyConstructorCanHaveConstParamForNonVBase &&
         (isAbstract() ||
          data().ImplicitCopyConstructorCanHaveConstParamForVBase);
}

/// Determine whether this class has a copy constructor with
/// a parameter type which is a reference to a const-qualified type.
bool hasCopyConstructorWithConstParam() const {
  return data().HasDeclaredCopyConstructorWithConstParam ||
         (needsImplicitCopyConstructor() &&
          implicitCopyConstructorHasConstParam());
}

/// Whether this class has a user-declared move constructor or
/// assignment operator.
///
/// When false, a move constructor and assignment operator may be
/// implicitly declared.
bool hasUserDeclaredMoveOperation() const {
  return data().UserDeclaredSpecialMembers &
           (SMF_MoveConstructor | SMF_MoveAssignment);
}

/// Determine whether this class has had a move constructor
/// declared by the user.
bool hasUserDeclaredMoveConstructor() const {
  return data().UserDeclaredSpecialMembers & SMF_MoveConstructor;
}

/// Determine whether this class has a move constructor.
bool hasMoveConstructor() const {
  return (data().DeclaredSpecialMembers & SMF_MoveConstructor) ||
         needsImplicitMoveConstructor();
}

/// Set that we attempted to declare an implicit copy
/// constructor, but overload resolution failed so we deleted it.
void setImplicitCopyConstructorIsDeleted() {
  assert((data().DefaultedCopyConstructorIsDeleted ||(((data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor
()) && "Copy constructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && \"Copy constructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1024, __PRETTY_FUNCTION__))
          needsOverloadResolutionForCopyConstructor()) &&(((data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor
()) && "Copy constructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && \"Copy constructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1024, __PRETTY_FUNCTION__))
         "Copy constructor should not be deleted")(((data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor
()) && "Copy constructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && \"Copy constructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1024, __PRETTY_FUNCTION__));
  data().DefaultedCopyConstructorIsDeleted = true;
}

/// Set that we attempted to declare an implicit move
/// constructor, but overload resolution failed so we deleted it.
void setImplicitMoveConstructorIsDeleted() {
  assert((data().DefaultedMoveConstructorIsDeleted ||(((data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor
()) && "move constructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && \"move constructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1033, __PRETTY_FUNCTION__))
          needsOverloadResolutionForMoveConstructor()) &&(((data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor
()) && "move constructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && \"move constructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1033, __PRETTY_FUNCTION__))
         "move constructor should not be deleted")(((data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor
()) && "move constructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && \"move constructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1033, __PRETTY_FUNCTION__));
  data().DefaultedMoveConstructorIsDeleted = true;
}

/// Set that we attempted to declare an implicit destructor,
/// but overload resolution failed so we deleted it.
void setImplicitDestructorIsDeleted() {
  assert((data().DefaultedDestructorIsDeleted ||(((data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor
()) && "destructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && \"destructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1042, __PRETTY_FUNCTION__))
          needsOverloadResolutionForDestructor()) &&(((data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor
()) && "destructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && \"destructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1042, __PRETTY_FUNCTION__))
         "destructor should not be deleted")(((data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor
()) && "destructor should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && \"destructor should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1042, __PRETTY_FUNCTION__));
  data().DefaultedDestructorIsDeleted = true;
}

/// Determine whether this class should get an implicit move
/// constructor or if any existing special member function inhibits this.
bool needsImplicitMoveConstructor() const {
  return !(data().DeclaredSpecialMembers & SMF_MoveConstructor) &&
         !hasUserDeclaredCopyConstructor() &&
         !hasUserDeclaredCopyAssignment() &&
         !hasUserDeclaredMoveAssignment() &&
         !hasUserDeclaredDestructor();
}

/// Determine whether we need to eagerly declare a defaulted move
/// constructor for this class.
bool needsOverloadResolutionForMoveConstructor() const {
  return data().NeedOverloadResolutionForMoveConstructor;
}

/// Determine whether this class has a user-declared copy assignment
/// operator.
///
/// When false, a copy assignment operator will be implicitly declared.
bool hasUserDeclaredCopyAssignment() const {
  return data().UserDeclaredSpecialMembers & SMF_CopyAssignment;
}

/// Determine whether this class needs an implicit copy
/// assignment operator to be lazily declared.
bool needsImplicitCopyAssignment() const {
  return !(data().DeclaredSpecialMembers & SMF_CopyAssignment);
}

/// Determine whether we need to eagerly declare a defaulted copy
/// assignment operator for this class.
bool needsOverloadResolutionForCopyAssignment() const {
  return data().HasMutableFields;
}

/// Determine whether an implicit copy assignment operator for this
/// type would have a parameter with a const-qualified reference type.
bool implicitCopyAssignmentHasConstParam() const {
  return data().ImplicitCopyAssignmentHasConstParam;
}

/// Determine whether this class has a copy assignment operator with
/// a parameter type which is a reference to a const-qualified type or is not
/// a reference.
bool hasCopyAssignmentWithConstParam() const {
  return data().HasDeclaredCopyAssignmentWithConstParam ||
         (needsImplicitCopyAssignment() &&
          implicitCopyAssignmentHasConstParam());
}

/// Determine whether this class has had a move assignment
/// declared by the user.
bool hasUserDeclaredMoveAssignment() const {
  return data().UserDeclaredSpecialMembers & SMF_MoveAssignment;
}

/// Determine whether this class has a move assignment operator.
bool hasMoveAssignment() const {
  return (data().DeclaredSpecialMembers & SMF_MoveAssignment) ||
         needsImplicitMoveAssignment();
}

/// Set that we attempted to declare an implicit move assignment
/// operator, but overload resolution failed so we deleted it.
void setImplicitMoveAssignmentIsDeleted() {
  assert((data().DefaultedMoveAssignmentIsDeleted ||(((data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment
()) && "move assignment should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && \"move assignment should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1114, __PRETTY_FUNCTION__))
          needsOverloadResolutionForMoveAssignment()) &&(((data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment
()) && "move assignment should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && \"move assignment should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1114, __PRETTY_FUNCTION__))
         "move assignment should not be deleted")(((data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment
()) && "move assignment should not be deleted") ? static_cast
<void> (0) : __assert_fail ("(data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && \"move assignment should not be deleted\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1114, __PRETTY_FUNCTION__));
  data().DefaultedMoveAssignmentIsDeleted = true;
}

/// Determine whether this class should get an implicit move
/// assignment operator or if any existing special member function inhibits
/// this.
bool needsImplicitMoveAssignment() const {
  return !(data().DeclaredSpecialMembers & SMF_MoveAssignment) &&
         !hasUserDeclaredCopyConstructor() &&
         !hasUserDeclaredCopyAssignment() &&
         !hasUserDeclaredMoveConstructor() &&
         !hasUserDeclaredDestructor() &&
         (!isLambda() || lambdaIsDefaultConstructibleAndAssignable());
}

/// Determine whether we need to eagerly declare a move assignment
/// operator for this class.
bool needsOverloadResolutionForMoveAssignment() const {
  return data().NeedOverloadResolutionForMoveAssignment;
}

/// Determine whether this class has a user-declared destructor.
///
/// When false, a destructor will be implicitly declared.
bool hasUserDeclaredDestructor() const {
  return data().UserDeclaredSpecialMembers & SMF_Destructor;
}

/// Determine whether this class needs an implicit destructor to
/// be lazily declared.
bool needsImplicitDestructor() const {
  return !(data().DeclaredSpecialMembers & SMF_Destructor);
}

/// Determine whether we need to eagerly declare a destructor for this
/// class.
bool needsOverloadResolutionForDestructor() const {
  return data().NeedOverloadResolutionForDestructor;
}

/// Determine whether this class describes a lambda function object.
bool isLambda() const {
  // An update record can't turn a non-lambda into a lambda.
  auto *DD = DefinitionData;
  return DD && DD->IsLambda;
}

/// Determine whether this class describes a generic
/// lambda function object (i.e. function call operator is
/// a template).
bool isGenericLambda() const;

/// Determine whether this lambda should have an implicit default constructor
/// and copy and move assignment operators.
bool lambdaIsDefaultConstructibleAndAssignable() const;

/// Retrieve the lambda call operator of the closure type
/// if this is a closure type.
CXXMethodDecl *getLambdaCallOperator() const;

/// Retrieve the dependent lambda call operator of the closure type
/// if this is a templated closure type.
FunctionTemplateDecl *getDependentLambdaCallOperator() const;

/// Retrieve the lambda static invoker, the address of which
/// is returned by the conversion operator, and the body of which
/// is forwarded to the lambda call operator.
CXXMethodDecl *getLambdaStaticInvoker() const;

/// Retrieve the generic lambda's template parameter list.
/// Returns null if the class does not represent a lambda or a generic
/// lambda.
TemplateParameterList *getGenericLambdaTemplateParameterList() const;

/// Retrieve the lambda template parameters that were specified explicitly.
ArrayRef<NamedDecl *> getLambdaExplicitTemplateParameters() const;

LambdaCaptureDefault getLambdaCaptureDefault() const {
  assert(isLambda())((isLambda()) ? static_cast<void> (0) : __assert_fail (
"isLambda()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1193, __PRETTY_FUNCTION__));
  return static_cast<LambdaCaptureDefault>(getLambdaData().CaptureDefault);
}

/// For a closure type, retrieve the mapping from captured
/// variables and \c this to the non-static data members that store the
/// values or references of the captures.
///
/// \param Captures Will be populated with the mapping from captured
/// variables to the corresponding fields.
///
/// \param ThisCapture Will be set to the field declaration for the
/// \c this capture.
///
/// \note No entries will be added for init-captures, as they do not capture
/// variables.
void getCaptureFields(llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures,
                      FieldDecl *&ThisCapture) const;

using capture_const_iterator = const LambdaCapture *;
using capture_const_range = llvm::iterator_range<capture_const_iterator>;

capture_const_range captures() const {
  return capture_const_range(captures_begin(), captures_end());
}

capture_const_iterator captures_begin() const {
  return isLambda() ? getLambdaData().Captures : nullptr;
}

capture_const_iterator captures_end() const {
  return isLambda() ? captures_begin() + getLambdaData().NumCaptures
                    : nullptr;
}

using conversion_iterator = UnresolvedSetIterator;

conversion_iterator conversion_begin() const {
  return data().Conversions.get(getASTContext()).begin();
}

conversion_iterator conversion_end() const {
  return data().Conversions.get(getASTContext()).end();
}

/// Removes a conversion function from this class.  The conversion
/// function must currently be a member of this class.  Furthermore,
/// this class must currently be in the process of being defined.
void removeConversion(const NamedDecl *Old);

/// Get all conversion functions visible in current class,
/// including conversion function templates.
llvm::iterator_range<conversion_iterator> getVisibleConversionFunctions();

/// Determine whether this class is an aggregate (C++ [dcl.init.aggr]),
/// which is a class with no user-declared constructors, no private
/// or protected non-static data members, no base classes, and no virtual
/// functions (C++ [dcl.init.aggr]p1).
bool isAggregate() const { return data().Aggregate; }

/// Whether this class has any in-class initializers
/// for non-static data members (including those in anonymous unions or
/// structs).
bool hasInClassInitializer() const { return data().HasInClassInitializer; }

/// Whether this class or any of its subobjects has any members of
/// reference type which would make value-initialization ill-formed.
///
/// Per C++03 [dcl.init]p5:
///  - if T is a non-union class type without a user-declared constructor,
///    then every non-static data member and base-class component of T is
///    value-initialized [...] A program that calls for [...]
///    value-initialization of an entity of reference type is ill-formed.
bool hasUninitializedReferenceMember() const {
  return !isUnion() && !hasUserDeclaredConstructor() &&
         data().HasUninitializedReferenceMember;
}

/// Whether this class is a POD-type (C++ [class]p4)
///
/// For purposes of this function a class is POD if it is an aggregate
/// that has no non-static non-POD data members, no reference data
/// members, no user-defined copy assignment operator and no
/// user-defined destructor.
///
/// Note that this is the C++ TR1 definition of POD.
bool isPOD() const { return data().PlainOldData; }

/// True if this class is C-like, without C++-specific features, e.g.
/// it contains only public fields, no bases, tag kind is not 'class', etc.
bool isCLike() const;

/// Determine whether this is an empty class in the sense of
/// (C++11 [meta.unary.prop]).
///
/// The CXXRecordDecl is a class type, but not a union type,
/// with no non-static data members other than bit-fields of length 0,
/// no virtual member functions, no virtual base classes,
/// and no base class B for which is_empty<B>::value is false.
///
/// \note This does NOT include a check for union-ness.
bool isEmpty() const { return data().Empty; }

bool hasPrivateFields() const {
  return data().HasPrivateFields;
}

bool hasProtectedFields() const {
  return data().HasProtectedFields;
}

/// Determine whether this class has direct non-static data members.
bool hasDirectFields() const {
  auto &D = data();
  return D.HasPublicFields || D.HasProtectedFields || D.HasPrivateFields;
}

/// Whether this class is polymorphic (C++ [class.virtual]),
/// which means that the class contains or inherits a virtual function.
bool isPolymorphic() const { return data().Polymorphic; }

/// Determine whether this class has a pure virtual function.
///
/// The class is is abstract per (C++ [class.abstract]p2) if it declares
/// a pure virtual function or inherits a pure virtual function that is
/// not overridden.
bool isAbstract() const { return data().Abstract; }

/// Determine whether this class is standard-layout per
/// C++ [class]p7.
bool isStandardLayout() const { return data().IsStandardLayout; }

/// Determine whether this class was standard-layout per
/// C++11 [class]p7, specifically using the C++11 rules without any DRs.
bool isCXX11StandardLayout() const { return data().IsCXX11StandardLayout; }

/// Determine whether this class, or any of its class subobjects,
/// contains a mutable field.
bool hasMutableFields() const { return data().HasMutableFields; }

/// Determine whether this class has any variant members.
bool hasVariantMembers() const { return data().HasVariantMembers; }

/// Determine whether this class has a trivial default constructor
/// (C++11 [class.ctor]p5).
bool hasTrivialDefaultConstructor() const {
  return hasDefaultConstructor() &&
         (data().HasTrivialSpecialMembers & SMF_DefaultConstructor);
}

/// Determine whether this class has a non-trivial default constructor
/// (C++11 [class.ctor]p5).
bool hasNonTrivialDefaultConstructor() const {
  return (data().DeclaredNonTrivialSpecialMembers & SMF_DefaultConstructor) ||
         (needsImplicitDefaultConstructor() &&
          !(data().HasTrivialSpecialMembers & SMF_DefaultConstructor));
}

/// Determine whether this class has at least one constexpr constructor
/// other than the copy or move constructors.
bool hasConstexprNonCopyMoveConstructor() const {
  return data().HasConstexprNonCopyMoveConstructor ||
         (needsImplicitDefaultConstructor() &&
          defaultedDefaultConstructorIsConstexpr());
}

/// Determine whether a defaulted default constructor for this class
/// would be constexpr.
bool defaultedDefaultConstructorIsConstexpr() const {
  return data().DefaultedDefaultConstructorIsConstexpr &&
         (!isUnion() || hasInClassInitializer() || !hasVariantMembers() ||
          getASTContext().getLangOpts().CPlusPlus2a);
}

/// Determine whether this class has a constexpr default constructor.
bool hasConstexprDefaultConstructor() const {
  return data().HasConstexprDefaultConstructor ||
         (needsImplicitDefaultConstructor() &&
          defaultedDefaultConstructorIsConstexpr());
}

/// Determine whether this class has a trivial copy constructor
/// (C++ [class.copy]p6, C++11 [class.copy]p12)
bool hasTrivialCopyConstructor() const {
  return data().HasTrivialSpecialMembers & SMF_CopyConstructor;
}

bool hasTrivialCopyConstructorForCall() const {
  return data().HasTrivialSpecialMembersForCall & SMF_CopyConstructor;
}

/// Determine whether this class has a non-trivial copy constructor
/// (C++ [class.copy]p6, C++11 [class.copy]p12)
bool hasNonTrivialCopyConstructor() const {
  return data().DeclaredNonTrivialSpecialMembers & SMF_CopyConstructor ||
         !hasTrivialCopyConstructor();
}

bool hasNonTrivialCopyConstructorForCall() const {
  return (data().DeclaredNonTrivialSpecialMembersForCall &
          SMF_CopyConstructor) ||
         !hasTrivialCopyConstructorForCall();
}

/// Determine whether this class has a trivial move constructor
/// (C++11 [class.copy]p12)
bool hasTrivialMoveConstructor() const {
  return hasMoveConstructor() &&
         (data().HasTrivialSpecialMembers & SMF_MoveConstructor);
}

bool hasTrivialMoveConstructorForCall() const {
  return hasMoveConstructor() &&
         (data().HasTrivialSpecialMembersForCall & SMF_MoveConstructor);
}

/// Determine whether this class has a non-trivial move constructor
/// (C++11 [class.copy]p12)
bool hasNonTrivialMoveConstructor() const {
  return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveConstructor) ||
         (needsImplicitMoveConstructor() &&
          !(data().HasTrivialSpecialMembers & SMF_MoveConstructor));
}

bool hasNonTrivialMoveConstructorForCall() const {
  return (data().DeclaredNonTrivialSpecialMembersForCall &
          SMF_MoveConstructor) ||
         (needsImplicitMoveConstructor() &&
          !(data().HasTrivialSpecialMembersForCall & SMF_MoveConstructor));
}

/// Determine whether this class has a trivial copy assignment operator
/// (C++ [class.copy]p11, C++11 [class.copy]p25)
bool hasTrivialCopyAssignment() const {
  return data().HasTrivialSpecialMembers & SMF_CopyAssignment;
}

/// Determine whether this class has a non-trivial copy assignment
/// operator (C++ [class.copy]p11, C++11 [class.copy]p25)
bool hasNonTrivialCopyAssignment() const {
  return data().DeclaredNonTrivialSpecialMembers & SMF_CopyAssignment ||
         !hasTrivialCopyAssignment();
}

/// Determine whether this class has a trivial move assignment operator
/// (C++11 [class.copy]p25)
bool hasTrivialMoveAssignment() const {
  return hasMoveAssignment() &&
         (data().HasTrivialSpecialMembers & SMF_MoveAssignment);
}

/// Determine whether this class has a non-trivial move assignment
/// operator (C++11 [class.copy]p25)
bool hasNonTrivialMoveAssignment() const {
  return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveAssignment) ||
         (needsImplicitMoveAssignment() &&
          !(data().HasTrivialSpecialMembers & SMF_MoveAssignment));
}

/// Determine whether a defaulted default constructor for this class
/// would be constexpr.
bool defaultedDestructorIsConstexpr() const {
  return data().DefaultedDestructorIsConstexpr &&
         getASTContext().getLangOpts().CPlusPlus2a;
}

/// Determine whether this class has a constexpr destructor.
bool hasConstexprDestructor() const;

/// Determine whether this class has a trivial destructor
/// (C++ [class.dtor]p3)
bool hasTrivialDestructor() const {
  return data().HasTrivialSpecialMembers & SMF_Destructor;
}

bool hasTrivialDestructorForCall() const {
  return data().HasTrivialSpecialMembersForCall & SMF_Destructor;
}

/// Determine whether this class has a non-trivial destructor
/// (C++ [class.dtor]p3)
bool hasNonTrivialDestructor() const {
  return !(data().HasTrivialSpecialMembers & SMF_Destructor);
}

bool hasNonTrivialDestructorForCall() const {
  return !(data().HasTrivialSpecialMembersForCall & SMF_Destructor);
}

void setHasTrivialSpecialMemberForCall() {
  data().HasTrivialSpecialMembersForCall =
      (SMF_CopyConstructor | SMF_MoveConstructor | SMF_Destructor);
}

/// Determine whether declaring a const variable with this type is ok
/// per core issue 253.
bool allowConstDefaultInit() const {
  return !data().HasUninitializedFields ||
         !(data().HasDefaultedDefaultConstructor ||
           needsImplicitDefaultConstructor());
}

/// Determine whether this class has a destructor which has no
/// semantic effect.
///
/// Any such destructor will be trivial, public, defaulted and not deleted,
/// and will call only irrelevant destructors.
bool hasIrrelevantDestructor() const {
  return data().HasIrrelevantDestructor;
}

/// Determine whether this class has a non-literal or/ volatile type
/// non-static data member or base class.
bool hasNonLiteralTypeFieldsOrBases() const {
  return data().HasNonLiteralTypeFieldsOrBases;
}

/// Determine whether this class has a using-declaration that names
/// a user-declared base class constructor.
bool hasInheritedConstructor() const {
  return data().HasInheritedConstructor;
}

/// Determine whether this class has a using-declaration that names
/// a base class assignment operator.
bool hasInheritedAssignment() const {
  return data().HasInheritedAssignment;
}

/// Determine whether this class is considered trivially copyable per
/// (C++11 [class]p6).
bool isTriviallyCopyable() const;

/// Determine whether this class is considered trivial.
///
/// C++11 [class]p6:
///    "A trivial class is a class that has a trivial default constructor and
///    is trivially copyable."
bool isTrivial() const {
  return isTriviallyCopyable() && hasTrivialDefaultConstructor();
}

/// Determine whether this class is a literal type.
///
/// C++11 [basic.types]p10:
///   A class type that has all the following properties:
///     - it has a trivial destructor
///     - every constructor call and full-expression in the
///       brace-or-equal-intializers for non-static data members (if any) is
///       a constant expression.
///     - it is an aggregate type or has at least one constexpr constructor
///       or constructor template that is not a copy or move constructor, and
///     - all of its non-static data members and base classes are of literal
///       types
///
/// We resolve DR1361 by ignoring the second bullet. We resolve DR1452 by
/// treating types with trivial default constructors as literal types.
///
/// Only in C++17 and beyond, are lambdas literal types.
bool isLiteral() const {
  ASTContext &Ctx = getASTContext();
  return (Ctx.getLangOpts().CPlusPlus2a ? hasConstexprDestructor()
                                        : hasTrivialDestructor()) &&
         (!isLambda() || Ctx.getLangOpts().CPlusPlus17) &&
         !hasNonLiteralTypeFieldsOrBases() &&
         (isAggregate() || isLambda() ||
          hasConstexprNonCopyMoveConstructor() ||
          hasTrivialDefaultConstructor());
}

/// If this record is an instantiation of a member class,
/// retrieves the member class from which it was instantiated.
///
/// This routine will return non-null for (non-templated) member
/// classes of class templates. For example, given:
///
/// \code
/// template<typename T>
/// struct X {
///   struct A { };
/// };
/// \endcode
///
/// The declaration for X<int>::A is a (non-templated) CXXRecordDecl
/// whose parent is the class template specialization X<int>. For
/// this declaration, getInstantiatedFromMemberClass() will return
/// the CXXRecordDecl X<T>::A. When a complete definition of
/// X<int>::A is required, it will be instantiated from the
/// declaration returned by getInstantiatedFromMemberClass().
CXXRecordDecl *getInstantiatedFromMemberClass() const;

/// If this class is an instantiation of a member class of a
/// class template specialization, retrieves the member specialization
/// information.
MemberSpecializationInfo *getMemberSpecializationInfo() const;

/// Specify that this record is an instantiation of the
/// member class \p RD.
void setInstantiationOfMemberClass(CXXRecordDecl *RD,
                                   TemplateSpecializationKind TSK);

/// Retrieves the class template that is described by this
/// class declaration.
///
/// Every class template is represented as a ClassTemplateDecl and a
/// CXXRecordDecl. The former contains template properties (such as
/// the template parameter lists) while the latter contains the
/// actual description of the template's
/// contents. ClassTemplateDecl::getTemplatedDecl() retrieves the
/// CXXRecordDecl that from a ClassTemplateDecl, while
/// getDescribedClassTemplate() retrieves the ClassTemplateDecl from
/// a CXXRecordDecl.
ClassTemplateDecl *getDescribedClassTemplate() const;

void setDescribedClassTemplate(ClassTemplateDecl *Template);

/// Determine whether this particular class is a specialization or
/// instantiation of a class template or member class of a class template,
/// and how it was instantiated or specialized.
TemplateSpecializationKind getTemplateSpecializationKind() const;

/// Set the kind of specialization or template instantiation this is.
void setTemplateSpecializationKind(TemplateSpecializationKind TSK);

/// Retrieve the record declaration from which this record could be
/// instantiated. Returns null if this class is not a template instantiation.
const CXXRecordDecl *getTemplateInstantiationPattern() const;

CXXRecordDecl *getTemplateInstantiationPattern() {
  return const_cast<CXXRecordDecl *>(const_cast<const CXXRecordDecl *>(this)
                                         ->getTemplateInstantiationPattern());
}

/// Returns the destructor decl for this class.
CXXDestructorDecl *getDestructor() const;

/// Returns true if the class destructor, or any implicitly invoked
/// destructors are marked noreturn.
bool isAnyDestructorNoReturn() const;

/// If the class is a local class [class.local], returns
/// the enclosing function declaration.
const FunctionDecl *isLocalClass() const {
  if (const auto *RD = dyn_cast<CXXRecordDecl>(getDeclContext()))
    return RD->isLocalClass();

  return dyn_cast<FunctionDecl>(getDeclContext());
}

FunctionDecl *isLocalClass() {
  return const_cast<FunctionDecl*>(
      const_cast<const CXXRecordDecl*>(this)->isLocalClass());
}

/// Determine whether this dependent class is a current instantiation,
/// when viewed from within the given context.
bool isCurrentInstantiation(const DeclContext *CurContext) const;

/// Determine whether this class is derived from the class \p Base.
///
/// This routine only determines whether this class is derived from \p Base,
/// but does not account for factors that may make a Derived -> Base class
/// ill-formed, such as private/protected inheritance or multiple, ambiguous
/// base class subobjects.
///
/// \param Base the base class we are searching for.
///
/// \returns true if this class is derived from Base, false otherwise.
bool isDerivedFrom(const CXXRecordDecl *Base) const;

/// Determine whether this class is derived from the type \p Base.
///
/// This routine only determines whether this class is derived from \p Base,
/// but does not account for factors that may make a Derived -> Base class
/// ill-formed, such as private/protected inheritance or multiple, ambiguous
/// base class subobjects.
///
/// \param Base the base class we are searching for.
///
/// \param Paths will contain the paths taken from the current class to the
/// given \p Base class.
///
/// \returns true if this class is derived from \p Base, false otherwise.
///
/// \todo add a separate parameter to configure IsDerivedFrom, rather than
/// tangling input and output in \p Paths
bool isDerivedFrom(const CXXRecordDecl *Base, CXXBasePaths &Paths) const;

/// Determine whether this class is virtually derived from
/// the class \p Base.
///
/// This routine only determines whether this class is virtually
/// derived from \p Base, but does not account for factors that may
/// make a Derived -> Base class ill-formed, such as
/// private/protected inheritance or multiple, ambiguous base class
/// subobjects.
///
/// \param Base the base class we are searching for.
///
/// \returns true if this class is virtually derived from Base,
/// false otherwise.
bool isVirtuallyDerivedFrom(const CXXRecordDecl *Base) const;

/// Determine whether this class is provably not derived from
/// the type \p Base.
bool isProvablyNotDerivedFrom(const CXXRecordDecl *Base) const;

/// Function type used by forallBases() as a callback.
///
/// \param BaseDefinition the definition of the base class
///
/// \returns true if this base matched the search criteria
using ForallBasesCallback =
    llvm::function_ref<bool(const CXXRecordDecl *BaseDefinition)>;

/// Determines if the given callback holds for all the direct
/// or indirect base classes of this type.
///
/// The class itself does not count as a base class.  This routine
/// returns false if the class has non-computable base classes.
///
/// \param BaseMatches Callback invoked for each (direct or indirect) base
/// class of this type, or if \p AllowShortCircuit is true then until a call
/// returns false.
///
/// \param AllowShortCircuit if false, forces the callback to be called
/// for every base class, even if a dependent or non-matching base was
/// found.
bool forallBases(ForallBasesCallback BaseMatches,
                 bool AllowShortCircuit = true) const;

/// Function type used by lookupInBases() to determine whether a
/// specific base class subobject matches the lookup criteria.
///
/// \param Specifier the base-class specifier that describes the inheritance
/// from the base class we are trying to match.
///
/// \param Path the current path, from the most-derived class down to the
/// base named by the \p Specifier.
///
/// \returns true if this base matched the search criteria, false otherwise.
using BaseMatchesCallback =
    llvm::function_ref<bool(const CXXBaseSpecifier *Specifier,
                            CXXBasePath &Path)>;

/// Look for entities within the base classes of this C++ class,
/// transitively searching all base class subobjects.
///
/// This routine uses the callback function \p BaseMatches to find base
/// classes meeting some search criteria, walking all base class subobjects
/// and populating the given \p Paths structure with the paths through the
/// inheritance hierarchy that resulted in a match. On a successful search,
/// the \p Paths structure can be queried to retrieve the matching paths and
/// to determine if there were any ambiguities.
///
/// \param BaseMatches callback function used to determine whether a given
/// base matches the user-defined search criteria.
///
/// \param Paths used to record the paths from this class to its base class
/// subobjects that match the search criteria.
///
/// \param LookupInDependent can be set to true to extend the search to
/// dependent base classes.
///
/// \returns true if there exists any path from this class to a base class
/// subobject that matches the search criteria.
bool lookupInBases(BaseMatchesCallback BaseMatches, CXXBasePaths &Paths,
                   bool LookupInDependent = false) const;

/// Base-class lookup callback that determines whether the given
/// base class specifier refers to a specific class declaration.
///
/// This callback can be used with \c lookupInBases() to determine whether
/// a given derived class has is a base class subobject of a particular type.
/// The base record pointer should refer to the canonical CXXRecordDecl of the
/// base class that we are searching for.
static bool FindBaseClass(const CXXBaseSpecifier *Specifier,
                          CXXBasePath &Path, const CXXRecordDecl *BaseRecord);

/// Base-class lookup callback that determines whether the
/// given base class specifier refers to a specific class
/// declaration and describes virtual derivation.
///
/// This callback can be used with \c lookupInBases() to determine
/// whether a given derived class has is a virtual base class
/// subobject of a particular type.  The base record pointer should
/// refer to the canonical CXXRecordDecl of the base class that we
/// are searching for.
static bool FindVirtualBaseClass(const CXXBaseSpecifier *Specifier,
                                 CXXBasePath &Path,
                                 const CXXRecordDecl *BaseRecord);

/// Base-class lookup callback that determines whether there exists
/// a tag with the given name.
///
/// This callback can be used with \c lookupInBases() to find tag members
/// of the given name within a C++ class hierarchy.
static bool FindTagMember(const CXXBaseSpecifier *Specifier,
                          CXXBasePath &Path, DeclarationName Name);

/// Base-class lookup callback that determines whether there exists
/// a member with the given name.
///
/// This callback can be used with \c lookupInBases() to find members
/// of the given name within a C++ class hierarchy.
static bool FindOrdinaryMember(const CXXBaseSpecifier *Specifier,
                               CXXBasePath &Path, DeclarationName Name);

/// Base-class lookup callback that determines whether there exists
/// a member with the given name.
///
/// This callback can be used with \c lookupInBases() to find members
/// of the given name within a C++ class hierarchy, including dependent
/// classes.
static bool
FindOrdinaryMemberInDependentClasses(const CXXBaseSpecifier *Specifier,
                                     CXXBasePath &Path, DeclarationName Name);

/// Base-class lookup callback that determines whether there exists
/// an OpenMP declare reduction member with the given name.
///
/// This callback can be used with \c lookupInBases() to find members
/// of the given name within a C++ class hierarchy.
static bool FindOMPReductionMember(const CXXBaseSpecifier *Specifier,
                                   CXXBasePath &Path, DeclarationName Name);

/// Base-class lookup callback that determines whether there exists
/// an OpenMP declare mapper member with the given name.
///
/// This callback can be used with \c lookupInBases() to find members
/// of the given name within a C++ class hierarchy.
static bool FindOMPMapperMember(const CXXBaseSpecifier *Specifier,
                                CXXBasePath &Path, DeclarationName Name);

/// Base-class lookup callback that determines whether there exists
/// a member with the given name that can be used in a nested-name-specifier.
///
/// This callback can be used with \c lookupInBases() to find members of
/// the given name within a C++ class hierarchy that can occur within
/// nested-name-specifiers.
static bool FindNestedNameSpecifierMember(const CXXBaseSpecifier *Specifier,
                                          CXXBasePath &Path,
                                          DeclarationName Name);

/// Retrieve the final overriders for each virtual member
/// function in the class hierarchy where this class is the
/// most-derived class in the class hierarchy.
void getFinalOverriders(CXXFinalOverriderMap &FinaOverriders) const;

/// Get the indirect primary bases for this class.
void getIndirectPrimaryBases(CXXIndirectPrimaryBaseSet& Bases) const;

/// Performs an imprecise lookup of a dependent name in this class.
///
/// This function does not follow strict semantic rules and should be used
/// only when lookup rules can be relaxed, e.g. indexing.
std::vector<const NamedDecl *>
lookupDependentName(const DeclarationName &Name,
                    llvm::function_ref<bool(const NamedDecl *ND)> Filter);

/// Renders and displays an inheritance diagram
/// for this C++ class and all of its base classes (transitively) using
/// GraphViz.
void viewInheritance(ASTContext& Context) const;

/// Calculates the access of a decl that is reached
/// along a path.
static AccessSpecifier MergeAccess(AccessSpecifier PathAccess,
                                   AccessSpecifier DeclAccess) {
  assert(DeclAccess != AS_none)((DeclAccess != AS_none) ? static_cast<void> (0) : __assert_fail
 ("DeclAccess != AS_none", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1862, __PRETTY_FUNCTION__));
  if (DeclAccess == AS_private) return AS_none;
  return (PathAccess > DeclAccess ? PathAccess : DeclAccess);
}

/// Indicates that the declaration of a defaulted or deleted special
/// member function is now complete.
void finishedDefaultedOrDeletedMember(CXXMethodDecl *MD);

void setTrivialForCallFlags(CXXMethodDecl *MD);

/// Indicates that the definition of this class is now complete.
void completeDefinition() override;

/// Indicates that the definition of this class is now complete,
/// and provides a final overrider map to help determine
///
/// \param FinalOverriders The final overrider map for this class, which can
/// be provided as an optimization for abstract-class checking. If NULL,
/// final overriders will be computed if they are needed to complete the
/// definition.
void completeDefinition(CXXFinalOverriderMap *FinalOverriders);

/// Determine whether this class may end up being abstract, even though
/// it is not yet known to be abstract.
///
/// \returns true if this class is not known to be abstract but has any
/// base classes that are abstract. In this case, \c completeDefinition()
/// will need to compute final overriders to determine whether the class is
/// actually abstract.
bool mayBeAbstract() const;

/// If this is the closure type of a lambda expression, retrieve the
/// number to be used for name mangling in the Itanium C++ ABI.
///
/// Zero indicates that this closure type has internal linkage, so the
/// mangling number does not matter, while a non-zero value indicates which
/// lambda expression this is in this particular context.
unsigned getLambdaManglingNumber() 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~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 1901, __PRETTY_FUNCTION__));
  return getLambdaData().ManglingNumber;
}

/// Retrieve the declaration that provides additional context for a
/// lambda, when the normal declaration context is not specific enough.
///
/// Certain contexts (default arguments of in-class function parameters and
/// the initializers of data members) have separate name mangling rules for
/// lambdas within the Itanium C++ ABI. For these cases, this routine provides
/// the declaration in which the lambda occurs, e.g., the function parameter
/// or the non-static data member. Otherwise, it returns NULL to imply that
/// the declaration context suffices.
Decl *getLambdaContextDecl() const;

/// Set the mangling number and context declaration for a lambda
/// class.
void setLambdaMangling(unsigned ManglingNumber, Decl *ContextDecl) {
  getLambdaData().ManglingNumber = ManglingNumber;
  getLambdaData().ContextDecl = ContextDecl;
}

/// Returns the inheritance model used for this record.
MSInheritanceAttr::Spelling getMSInheritanceModel() const;

/// Calculate what the inheritance model would be for this class.
MSInheritanceAttr::Spelling calculateInheritanceModel() const;

/// In the Microsoft C++ ABI, use zero for the field offset of a null data
/// member pointer if we can guarantee that zero is not a valid field offset,
/// or if the member pointer has multiple fields.  Polymorphic classes have a
/// vfptr at offset zero, so we can use zero for null.  If there are multiple
/// fields, we can use zero even if it is a valid field offset because
/// null-ness testing will check the other fields.
bool nullFieldOffsetIsZero() const {
  return !MSInheritanceAttr::hasOnlyOneField(/*IsMemberFunction=*/false,
                                             getMSInheritanceModel()) ||
         (hasDefinition() && isPolymorphic());
}

/// Controls when vtordisps will be emitted if this record is used as a
/// virtual base.
MSVtorDispAttr::Mode getMSVtorDispMode() const;

/// Determine whether this lambda expression was known to be dependent
/// at the time it was created, even if its context does not appear to be
/// dependent.
///
/// This flag is a workaround for an issue with parsing, where default
/// arguments are parsed before their enclosing function declarations have
/// been created. This means that any lambda expressions within those
/// default arguments will have as their DeclContext the context enclosing
/// the function declaration, which may be non-dependent even when the
/// function declaration itself is dependent. This flag indicates when we
/// know that the lambda is dependent despite that.
bool isDependentLambda() const {
  return isLambda() && getLambdaData().Dependent;
}

TypeSourceInfo *getLambdaTypeInfo() const {
  return getLambdaData().MethodTyInfo;
}

// Determine whether this type is an Interface Like type for
// __interface inheritance purposes.
bool isInterfaceLike() const;

static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) {
  return K >= firstCXXRecord && K <= lastCXXRecord;
}
1972};

1974/// Store information needed for an explicit specifier.
1975/// used by CXXDeductionGuideDecl, CXXConstructorDecl and CXXConversionDecl.
1976class ExplicitSpecifier {
llvm::PointerIntPair<Expr *, 2, ExplicitSpecKind> ExplicitSpec{
    nullptr, ExplicitSpecKind::ResolvedFalse};

1980public:
ExplicitSpecifier() = default;
ExplicitSpecifier(Expr *Expression, ExplicitSpecKind Kind)
    : ExplicitSpec(Expression, Kind) {}
ExplicitSpecKind getKind() const { return ExplicitSpec.getInt(); }
const Expr *getExpr() const { return ExplicitSpec.getPointer(); }
Expr *getExpr() { return ExplicitSpec.getPointer(); }

/// Return true if the ExplicitSpecifier isn't defaulted.
bool isSpecified() const {
  return ExplicitSpec.getInt() != ExplicitSpecKind::ResolvedFalse ||
         ExplicitSpec.getPointer();
}

/// Check for Equivalence of explicit specifiers.
/// Return True if the explicit specifier are equivalent false otherwise.
bool isEquivalent(const ExplicitSpecifier Other) const;
/// Return true if the explicit specifier is already resolved to be explicit.
bool isExplicit() const {
  return ExplicitSpec.getInt() == ExplicitSpecKind::ResolvedTrue;
3
←
Returning zero, which participates in a condition later→
}
/// Return true if the ExplicitSpecifier isn't valid.
/// This state occurs after a substitution failures.
bool isInvalid() const {
  return ExplicitSpec.getInt() == ExplicitSpecKind::Unresolved &&
         !ExplicitSpec.getPointer();
}
void setKind(ExplicitSpecKind Kind) { ExplicitSpec.setInt(Kind); }
void setExpr(Expr *E) { ExplicitSpec.setPointer(E); }
// getFromDecl - retrieve the explicit specifier in the given declaration.
// if the given declaration has no explicit. the returned explicit specifier
// is defaulted. .isSpecified() will be false.
static ExplicitSpecifier getFromDecl(FunctionDecl *Function);
static const ExplicitSpecifier getFromDecl(const FunctionDecl *Function) {
  return getFromDecl(const_cast<FunctionDecl *>(Function));
}
static ExplicitSpecifier Invalid() {
  return ExplicitSpecifier(nullptr, ExplicitSpecKind::Unresolved);
}
2019};

2021/// Represents a C++ deduction guide declaration.
2022///
2023/// \code
2024/// template<typename T> struct A { A(); A(T); };
2025/// A() -> A<int>;
2026/// \endcode
2027///
2028/// In this example, there will be an explicit deduction guide from the
2029/// second line, and implicit deduction guide templates synthesized from
2030/// the constructors of \c A.
2031class CXXDeductionGuideDecl : public FunctionDecl {
void anchor() override;

2034private:
CXXDeductionGuideDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
                      ExplicitSpecifier ES,
                      const DeclarationNameInfo &NameInfo, QualType T,
                      TypeSourceInfo *TInfo, SourceLocation EndLocation)
    : FunctionDecl(CXXDeductionGuide, C, DC, StartLoc, NameInfo, T, TInfo,
                   SC_None, false, CSK_unspecified),
      ExplicitSpec(ES) {
  if (EndLocation.isValid())
    setRangeEnd(EndLocation);
  setIsCopyDeductionCandidate(false);
}

ExplicitSpecifier ExplicitSpec;
void setExplicitSpecifier(ExplicitSpecifier ES) { ExplicitSpec = ES; }

2050public:
friend class ASTDeclReader;
friend class ASTDeclWriter;

static CXXDeductionGuideDecl *
Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
       ExplicitSpecifier ES, const DeclarationNameInfo &NameInfo, QualType T,
       TypeSourceInfo *TInfo, SourceLocation EndLocation);

static CXXDeductionGuideDecl *CreateDeserialized(ASTContext &C, unsigned ID);

ExplicitSpecifier getExplicitSpecifier() { return ExplicitSpec; }
const ExplicitSpecifier getExplicitSpecifier() const { return ExplicitSpec; }

/// Return true if the declartion is already resolved to be explicit.
bool isExplicit() const { return ExplicitSpec.isExplicit(); }

/// Get the template for which this guide performs deduction.
TemplateDecl *getDeducedTemplate() const {
  return getDeclName().getCXXDeductionGuideTemplate();
}

void setIsCopyDeductionCandidate(bool isCDC = true) {
  FunctionDeclBits.IsCopyDeductionCandidate = isCDC;
}

bool isCopyDeductionCandidate() const {
  return FunctionDeclBits.IsCopyDeductionCandidate;
}

// Implement isa/cast/dyncast/etc.
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == CXXDeductionGuide; }
2083};

2085/// Represents a static or instance method of a struct/union/class.
2086///
2087/// In the terminology of the C++ Standard, these are the (static and
2088/// non-static) member functions, whether virtual or not.
2089class CXXMethodDecl : public FunctionDecl {
void anchor() override;

2092protected:
CXXMethodDecl(Kind DK, ASTContext &C, CXXRecordDecl *RD,
              SourceLocation StartLoc, const DeclarationNameInfo &NameInfo,
              QualType T, TypeSourceInfo *TInfo, StorageClass SC,
              bool isInline, ConstexprSpecKind ConstexprKind,
              SourceLocation EndLocation)
    : FunctionDecl(DK, C, RD, StartLoc, NameInfo, T, TInfo, SC, isInline,
                   ConstexprKind) {
  if (EndLocation.isValid())
    setRangeEnd(EndLocation);
}

2104public:
static CXXMethodDecl *Create(ASTContext &C, CXXRecordDecl *RD,
                             SourceLocation StartLoc,
                             const DeclarationNameInfo &NameInfo, QualType T,
                             TypeSourceInfo *TInfo, StorageClass SC,
                             bool isInline, ConstexprSpecKind ConstexprKind,
                             SourceLocation EndLocation);

static CXXMethodDecl *CreateDeserialized(ASTContext &C, unsigned ID);

bool isStatic() const;
bool isInstance() const { return !isStatic(); }

/// Returns true if the given operator is implicitly static in a record
/// context.
static bool isStaticOverloadedOperator(OverloadedOperatorKind OOK) {
  // [class.free]p1:
  // Any allocation function for a class T is a static member
  // (even if not explicitly declared static).
  // [class.free]p6 Any deallocation function for a class X is a static member
  // (even if not explicitly declared static).
  return OOK == OO_New || OOK == OO_Array_New || OOK == OO_Delete ||
         OOK == OO_Array_Delete;
}

bool isConst() const { return getType()->castAs<FunctionType>()->isConst(); }
bool isVolatile() const { return getType()->castAs<FunctionType>()->isVolatile(); }

bool isVirtual() const {
  CXXMethodDecl *CD = const_cast<CXXMethodDecl*>(this)->getCanonicalDecl();

  // Member function is virtual if it is marked explicitly so, or if it is
  // declared in __interface -- then it is automatically pure virtual.
  if (CD->isVirtualAsWritten() || CD->isPure())
    return true;

  return CD->size_overridden_methods() != 0;
}

/// If it's possible to devirtualize a call to this method, return the called
/// function. Otherwise, return null.

/// \param Base The object on which this virtual function is called.
/// \param IsAppleKext True if we are compiling for Apple kext.
CXXMethodDecl *getDevirtualizedMethod(const Expr *Base, bool IsAppleKext);

const CXXMethodDecl *getDevirtualizedMethod(const Expr *Base,
                                            bool IsAppleKext) const {
  return const_cast<CXXMethodDecl *>(this)->getDevirtualizedMethod(
      Base, IsAppleKext);
}

/// Determine whether this is a usual deallocation function (C++
/// [basic.stc.dynamic.deallocation]p2), which is an overloaded delete or
/// delete[] operator with a particular signature. Populates \p PreventedBy
/// with the declarations of the functions of the same kind if they were the
/// reason for this function returning false. This is used by
/// Sema::isUsualDeallocationFunction to reconsider the answer based on the
/// context.
bool isUsualDeallocationFunction(
    SmallVectorImpl<const FunctionDecl *> &PreventedBy) const;

/// Determine whether this is a copy-assignment operator, regardless
/// of whether it was declared implicitly or explicitly.
bool isCopyAssignmentOperator() const;

/// Determine whether this is a move assignment operator.
bool isMoveAssignmentOperator() const;

CXXMethodDecl *getCanonicalDecl() override {
  return cast<CXXMethodDecl>(FunctionDecl::getCanonicalDecl());
}
const CXXMethodDecl *getCanonicalDecl() const {
  return const_cast<CXXMethodDecl*>(this)->getCanonicalDecl();
}

CXXMethodDecl *getMostRecentDecl() {
  return cast<CXXMethodDecl>(
          static_cast<FunctionDecl *>(this)->getMostRecentDecl());
}
const CXXMethodDecl *getMostRecentDecl() const {
  return const_cast<CXXMethodDecl*>(this)->getMostRecentDecl();
}

/// True if this method is user-declared and was not
/// deleted or defaulted on its first declaration.
bool isUserProvided() const {
  auto *DeclAsWritten = this;
  if (auto *Pattern = getTemplateInstantiationPattern())
    DeclAsWritten = cast<CXXMethodDecl>(Pattern);
  return !(DeclAsWritten->isDeleted() ||
           DeclAsWritten->getCanonicalDecl()->isDefaulted());
}

void addOverriddenMethod(const CXXMethodDecl *MD);

using method_iterator = const CXXMethodDecl *const *;

method_iterator begin_overridden_methods() const;
method_iterator end_overridden_methods() const;
unsigned size_overridden_methods() const;

using overridden_method_range= ASTContext::overridden_method_range;

overridden_method_range overridden_methods() const;

/// Return the parent of this method declaration, which
/// is the class in which this method is defined.
const CXXRecordDecl *getParent() const {
  return cast<CXXRecordDecl>(FunctionDecl::getParent());
}

/// Return the parent of this method declaration, which
/// is the class in which this method is defined.
CXXRecordDecl *getParent() {
  return const_cast<CXXRecordDecl *>(
           cast<CXXRecordDecl>(FunctionDecl::getParent()));
}

/// Return the type of the \c this pointer.
///
/// Should only be called for instance (i.e., non-static) methods. Note
/// that for the call operator of a lambda closure type, this returns the
/// desugared 'this' type (a pointer to the closure type), not the captured
/// 'this' type.
QualType getThisType() const;

/// Return the type of the object pointed by \c this.
///
/// See getThisType() for usage restriction.
QualType getThisObjectType() const;

static QualType getThisType(const FunctionProtoType *FPT,
                            const CXXRecordDecl *Decl);

static QualType getThisObjectType(const FunctionProtoType *FPT,
                                  const CXXRecordDecl *Decl);

Qualifiers getMethodQualifiers() const {
  return getType()->castAs<FunctionProtoType>()->getMethodQuals();
}

/// Retrieve the ref-qualifier associated with this method.
///
/// In the following example, \c f() has an lvalue ref-qualifier, \c g()
/// has an rvalue ref-qualifier, and \c h() has no ref-qualifier.
/// @code
/// struct X {
///   void f() &;
///   void g() &&;
///   void h();
/// };
/// @endcode
RefQualifierKind getRefQualifier() const {
  return getType()->castAs<FunctionProtoType>()->getRefQualifier();
}

bool hasInlineBody() const;

/// Determine whether this is a lambda closure type's static member
/// function that is used for the result of the lambda's conversion to
/// function pointer (for a lambda with no captures).
///
/// The function itself, if used, will have a placeholder body that will be
/// supplied by IR generation to either forward to the function call operator
/// or clone the function call operator.
bool isLambdaStaticInvoker() const;

/// Find the method in \p RD that corresponds to this one.
///
/// Find if \p RD or one of the classes it inherits from override this method.
/// If so, return it. \p RD is assumed to be a subclass of the class defining
/// this method (or be the class itself), unless \p MayBeBase is set to true.
CXXMethodDecl *
getCorrespondingMethodInClass(const CXXRecordDecl *RD,
                              bool MayBeBase = false);

const CXXMethodDecl *
getCorrespondingMethodInClass(const CXXRecordDecl *RD,
                              bool MayBeBase = false) const {
  return const_cast<CXXMethodDecl *>(this)
            ->getCorrespondingMethodInClass(RD, MayBeBase);
}

/// Find if \p RD declares a function that overrides this function, and if so,
/// return it. Does not search base classes.
CXXMethodDecl *getCorrespondingMethodDeclaredInClass(const CXXRecordDecl *RD,
                                                     bool MayBeBase = false);
const CXXMethodDecl *
getCorrespondingMethodDeclaredInClass(const CXXRecordDecl *RD,
                                      bool MayBeBase = false) const {
  return const_cast<CXXMethodDecl *>(this)
      ->getCorrespondingMethodDeclaredInClass(RD, MayBeBase);
}

// Implement isa/cast/dyncast/etc.
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) {
  return K >= firstCXXMethod && K <= lastCXXMethod;
}
2304};

2306/// Represents a C++ base or member initializer.
2307///
2308/// This is part of a constructor initializer that
2309/// initializes one non-static member variable or one base class. For
2310/// example, in the following, both 'A(a)' and 'f(3.14159)' are member
2311/// initializers:
2312///
2313/// \code
2314/// class A { };
2315/// class B : public A {
2316///   float f;
2317/// public:
2318///   B(A& a) : A(a), f(3.14159) { }
2319/// };
2320/// \endcode
2321class CXXCtorInitializer final {
/// Either the base class name/delegating constructor type (stored as
/// a TypeSourceInfo*), an normal field (FieldDecl), or an anonymous field
/// (IndirectFieldDecl*) being initialized.
llvm::PointerUnion3<TypeSourceInfo *, FieldDecl *, IndirectFieldDecl *>
  Initializee;

/// The source location for the field name or, for a base initializer
/// pack expansion, the location of the ellipsis.
///
/// In the case of a delegating
/// constructor, it will still include the type's source location as the
/// Initializee points to the CXXConstructorDecl (to allow loop detection).
SourceLocation MemberOrEllipsisLocation;

/// The argument used to initialize the base or member, which may
/// end up constructing an object (when multiple arguments are involved).
Stmt *Init;

/// Location of the left paren of the ctor-initializer.
SourceLocation LParenLoc;

/// Location of the right paren of the ctor-initializer.
SourceLocation RParenLoc;

/// If the initializee is a type, whether that type makes this
/// a delegating initialization.
unsigned IsDelegating : 1;

/// If the initializer is a base initializer, this keeps track
/// of whether the base is virtual or not.
unsigned IsVirtual : 1;

/// Whether or not the initializer is explicitly written
/// in the sources.
unsigned IsWritten : 1;

/// If IsWritten is true, then this number keeps track of the textual order
/// of this initializer in the original sources, counting from 0.
unsigned SourceOrder : 13;

2362public:
/// Creates a new base-class initializer.
explicit
CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo, bool IsVirtual,
                   SourceLocation L, Expr *Init, SourceLocation R,
                   SourceLocation EllipsisLoc);

/// Creates a new member initializer.
explicit
CXXCtorInitializer(ASTContext &Context, FieldDecl *Member,
                   SourceLocation MemberLoc, SourceLocation L, Expr *Init,
                   SourceLocation R);

/// Creates a new anonymous field initializer.
explicit
CXXCtorInitializer(ASTContext &Context, IndirectFieldDecl *Member,
                   SourceLocation MemberLoc, SourceLocation L, Expr *Init,
                   SourceLocation R);

/// Creates a new delegating initializer.
explicit
CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo,
                   SourceLocation L, Expr *Init, SourceLocation R);

/// \return Unique reproducible object identifier.
int64_t getID(const ASTContext &Context) const;

/// Determine whether this initializer is initializing a base class.
bool isBaseInitializer() const {
  return Initializee.is<TypeSourceInfo*>() && !IsDelegating;
}

/// Determine whether this initializer is initializing a non-static
/// data member.
bool isMemberInitializer() const { return Initializee.is<FieldDecl*>(); }

bool isAnyMemberInitializer() const {
  return isMemberInitializer() || isIndirectMemberInitializer();
}

bool isIndirectMemberInitializer() const {
  return Initializee.is<IndirectFieldDecl*>();
}

/// Determine whether this initializer is an implicit initializer
/// generated for a field with an initializer defined on the member
/// declaration.
///
/// In-class member initializers (also known as "non-static data member
/// initializations", NSDMIs) were introduced in C++11.
bool isInClassMemberInitializer() const {
  return Init->getStmtClass() == Stmt::CXXDefaultInitExprClass;
}

/// Determine whether this initializer is creating a delegating
/// constructor.
bool isDelegatingInitializer() const {
  return Initializee.is<TypeSourceInfo*>() && IsDelegating;
}

/// Determine whether this initializer is a pack expansion.
bool isPackExpansion() const {
  return isBaseInitializer() && MemberOrEllipsisLocation.isValid();
}

// For a pack expansion, returns the location of the ellipsis.
SourceLocation getEllipsisLoc() const {
  assert(isPackExpansion() && "Initializer is not a pack expansion")((isPackExpansion() && "Initializer is not a pack expansion"
) ? static_cast<void> (0) : __assert_fail ("isPackExpansion() && \"Initializer is not a pack expansion\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2429, __PRETTY_FUNCTION__));
  return MemberOrEllipsisLocation;
}

/// If this is a base class initializer, returns the type of the
/// base class with location information. Otherwise, returns an NULL
/// type location.
TypeLoc getBaseClassLoc() const;

/// If this is a base class initializer, returns the type of the base class.
/// Otherwise, returns null.
const Type *getBaseClass() const;

/// Returns whether the base is virtual or not.
bool isBaseVirtual() const {
  assert(isBaseInitializer() && "Must call this on base initializer!")((isBaseInitializer() && "Must call this on base initializer!"
) ? static_cast<void> (0) : __assert_fail ("isBaseInitializer() && \"Must call this on base initializer!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2444, __PRETTY_FUNCTION__));

  return IsVirtual;
}

/// Returns the declarator information for a base class or delegating
/// initializer.
TypeSourceInfo *getTypeSourceInfo() const {
  return Initializee.dyn_cast<TypeSourceInfo *>();
}

/// If this is a member initializer, returns the declaration of the
/// non-static data member being initialized. Otherwise, returns null.
FieldDecl *getMember() const {
  if (isMemberInitializer())
    return Initializee.get<FieldDecl*>();
  return nullptr;
}

FieldDecl *getAnyMember() const {
  if (isMemberInitializer())
    return Initializee.get<FieldDecl*>();
  if (isIndirectMemberInitializer())
    return Initializee.get<IndirectFieldDecl*>()->getAnonField();
  return nullptr;
}

IndirectFieldDecl *getIndirectMember() const {
  if (isIndirectMemberInitializer())
    return Initializee.get<IndirectFieldDecl*>();
  return nullptr;
}

SourceLocation getMemberLocation() const {
  return MemberOrEllipsisLocation;
}

/// Determine the source location of the initializer.
SourceLocation getSourceLocation() const;

/// Determine the source range covering the entire initializer.
SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__));

/// Determine whether this initializer is explicitly written
/// in the source code.
bool isWritten() const { return IsWritten; }

/// Return the source position of the initializer, counting from 0.
/// If the initializer was implicit, -1 is returned.
int getSourceOrder() const {
  return IsWritten ? static_cast<int>(SourceOrder) : -1;
}

/// Set the source order of this initializer.
///
/// This can only be called once for each initializer; it cannot be called
/// on an initializer having a positive number of (implicit) array indices.
///
/// This assumes that the initializer was written in the source code, and
/// ensures that isWritten() returns true.
void setSourceOrder(int Pos) {
  assert(!IsWritten &&((!IsWritten && "setSourceOrder() used on implicit initializer"
) ? static_cast<void> (0) : __assert_fail ("!IsWritten && \"setSourceOrder() used on implicit initializer\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2506, __PRETTY_FUNCTION__))
         "setSourceOrder() used on implicit initializer")((!IsWritten && "setSourceOrder() used on implicit initializer"
) ? static_cast<void> (0) : __assert_fail ("!IsWritten && \"setSourceOrder() used on implicit initializer\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2506, __PRETTY_FUNCTION__));
  assert(SourceOrder == 0 &&((SourceOrder == 0 && "calling twice setSourceOrder() on the same initializer"
) ? static_cast<void> (0) : __assert_fail ("SourceOrder == 0 && \"calling twice setSourceOrder() on the same initializer\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2508, __PRETTY_FUNCTION__))
         "calling twice setSourceOrder() on the same initializer")((SourceOrder == 0 && "calling twice setSourceOrder() on the same initializer"
) ? static_cast<void> (0) : __assert_fail ("SourceOrder == 0 && \"calling twice setSourceOrder() on the same initializer\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2508, __PRETTY_FUNCTION__));
  assert(Pos >= 0 &&((Pos >= 0 && "setSourceOrder() used to make an initializer implicit"
) ? static_cast<void> (0) : __assert_fail ("Pos >= 0 && \"setSourceOrder() used to make an initializer implicit\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2510, __PRETTY_FUNCTION__))
         "setSourceOrder() used to make an initializer implicit")((Pos >= 0 && "setSourceOrder() used to make an initializer implicit"
) ? static_cast<void> (0) : __assert_fail ("Pos >= 0 && \"setSourceOrder() used to make an initializer implicit\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2510, __PRETTY_FUNCTION__));
  IsWritten = true;
  SourceOrder = static_cast<unsigned>(Pos);
}

SourceLocation getLParenLoc() const { return LParenLoc; }
SourceLocation getRParenLoc() const { return RParenLoc; }

/// Get the initializer.
Expr *getInit() const { return static_cast<Expr *>(Init); }
2520};

2522/// Description of a constructor that was inherited from a base class.
2523class InheritedConstructor {
ConstructorUsingShadowDecl *Shadow = nullptr;
CXXConstructorDecl *BaseCtor = nullptr;

2527public:
InheritedConstructor() = default;
InheritedConstructor(ConstructorUsingShadowDecl *Shadow,
                     CXXConstructorDecl *BaseCtor)
    : Shadow(Shadow), BaseCtor(BaseCtor) {}

explicit operator bool() const { return Shadow; }

ConstructorUsingShadowDecl *getShadowDecl() const { return Shadow; }
CXXConstructorDecl *getConstructor() const { return BaseCtor; }
2537};

2539/// Represents a C++ constructor within a class.
2540///
2541/// For example:
2542///
2543/// \code
2544/// class X {
2545/// public:
2546///   explicit X(int); // represented by a CXXConstructorDecl.
2547/// };
2548/// \endcode
2549class CXXConstructorDecl final
  : public CXXMethodDecl,
    private llvm::TrailingObjects<CXXConstructorDecl, InheritedConstructor,
                                  ExplicitSpecifier> {
// This class stores some data in DeclContext::CXXConstructorDeclBits
// to save some space. Use the provided accessors to access it.

/// \name Support for base and member initializers.
/// \{
/// The arguments used to initialize the base or member.
LazyCXXCtorInitializersPtr CtorInitializers;

CXXConstructorDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
                   const DeclarationNameInfo &NameInfo, QualType T,
                   TypeSourceInfo *TInfo, ExplicitSpecifier ES, bool isInline,
                   bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind,
                   InheritedConstructor Inherited);

void anchor() override;

size_t numTrailingObjects(OverloadToken<InheritedConstructor>) const {
  return CXXConstructorDeclBits.IsInheritingConstructor;
}
size_t numTrailingObjects(OverloadToken<ExplicitSpecifier>) const {
  return CXXConstructorDeclBits.HasTrailingExplicitSpecifier;
}

ExplicitSpecifier getExplicitSpecifierInternal() const {
  if (CXXConstructorDeclBits.HasTrailingExplicitSpecifier)
    return *getTrailingObjects<ExplicitSpecifier>();
  return ExplicitSpecifier(
      nullptr, CXXConstructorDeclBits.IsSimpleExplicit
                   ? ExplicitSpecKind::ResolvedTrue
                   : ExplicitSpecKind::ResolvedFalse);
}

void setExplicitSpecifier(ExplicitSpecifier ES) {
  assert((!ES.getExpr() ||(((!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier
) && "cannot set this explicit specifier. no trail-allocated space for "
 "explicit") ? static_cast<void> (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2589, __PRETTY_FUNCTION__))
          CXXConstructorDeclBits.HasTrailingExplicitSpecifier) &&(((!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier
) && "cannot set this explicit specifier. no trail-allocated space for "
 "explicit") ? static_cast<void> (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2589, __PRETTY_FUNCTION__))
         "cannot set this explicit specifier. no trail-allocated space for "(((!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier
) && "cannot set this explicit specifier. no trail-allocated space for "
 "explicit") ? static_cast<void> (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2589, __PRETTY_FUNCTION__))
         "explicit")(((!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier
) && "cannot set this explicit specifier. no trail-allocated space for "
 "explicit") ? static_cast<void> (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2589, __PRETTY_FUNCTION__));
  if (ES.getExpr())
    *getCanonicalDecl()->getTrailingObjects<ExplicitSpecifier>() = ES;
  else
    CXXConstructorDeclBits.IsSimpleExplicit = ES.isExplicit();
}

enum TraillingAllocKind {
  TAKInheritsConstructor = 1,
  TAKHasTailExplicit = 1 << 1,
};

uint64_t getTraillingAllocKind() const {
  return numTrailingObjects(OverloadToken<InheritedConstructor>()) |
         (numTrailingObjects(OverloadToken<ExplicitSpecifier>()) << 1);
}

2606public:
friend class ASTDeclReader;
friend class ASTDeclWriter;
friend TrailingObjects;

static CXXConstructorDecl *CreateDeserialized(ASTContext &C, unsigned ID,
                                              uint64_t AllocKind);
static 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 = InheritedConstructor());

ExplicitSpecifier getExplicitSpecifier() {
  return getCanonicalDecl()->getExplicitSpecifierInternal();
}
const ExplicitSpecifier getExplicitSpecifier() const {
  return getCanonicalDecl()->getExplicitSpecifierInternal();
}

/// Return true if the declartion is already resolved to be explicit.
bool isExplicit() const { return getExplicitSpecifier().isExplicit(); }
2
←
Calling 'ExplicitSpecifier::isExplicit'→
4
←
Returning from 'ExplicitSpecifier::isExplicit'→
5
←
Returning zero, which participates in a condition later→

/// Iterates through the member/base initializer list.
using init_iterator = CXXCtorInitializer **;

/// Iterates through the member/base initializer list.
using init_const_iterator = CXXCtorInitializer *const *;

using init_range = llvm::iterator_range<init_iterator>;
using init_const_range = llvm::iterator_range<init_const_iterator>;

init_range inits() { return init_range(init_begin(), init_end()); }
init_const_range inits() const {
  return init_const_range(init_begin(), init_end());
}

/// Retrieve an iterator to the first initializer.
init_iterator init_begin() {
  const auto *ConstThis = this;
  return const_cast<init_iterator>(ConstThis->init_begin());
}

/// Retrieve an iterator to the first initializer.
init_const_iterator init_begin() const;

/// Retrieve an iterator past the last initializer.
init_iterator       init_end()       {
  return init_begin() + getNumCtorInitializers();
}

/// Retrieve an iterator past the last initializer.
init_const_iterator init_end() const {
  return init_begin() + getNumCtorInitializers();
}

using init_reverse_iterator = std::reverse_iterator<init_iterator>;
using init_const_reverse_iterator =
    std::reverse_iterator<init_const_iterator>;

init_reverse_iterator init_rbegin() {
  return init_reverse_iterator(init_end());
}
init_const_reverse_iterator init_rbegin() const {
  return init_const_reverse_iterator(init_end());
}

init_reverse_iterator init_rend() {
  return init_reverse_iterator(init_begin());
}
init_const_reverse_iterator init_rend() const {
  return init_const_reverse_iterator(init_begin());
}

/// Determine the number of arguments used to initialize the member
/// or base.
unsigned getNumCtorInitializers() const {
    return CXXConstructorDeclBits.NumCtorInitializers;
}

void setNumCtorInitializers(unsigned numCtorInitializers) {
  CXXConstructorDeclBits.NumCtorInitializers = numCtorInitializers;
  // This assert added because NumCtorInitializers is stored
  // in CXXConstructorDeclBits as a bitfield and its width has
  // been shrunk from 32 bits to fit into CXXConstructorDeclBitfields.
  assert(CXXConstructorDeclBits.NumCtorInitializers ==((CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers
 && "NumCtorInitializers overflow!") ? static_cast<
void> (0) : __assert_fail ("CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers && \"NumCtorInitializers overflow!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2693, __PRETTY_FUNCTION__))
         numCtorInitializers && "NumCtorInitializers overflow!")((CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers
 && "NumCtorInitializers overflow!") ? static_cast<
void> (0) : __assert_fail ("CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers && \"NumCtorInitializers overflow!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2693, __PRETTY_FUNCTION__));
}

void setCtorInitializers(CXXCtorInitializer **Initializers) {
  CtorInitializers = Initializers;
}

/// Determine whether this constructor is a delegating constructor.
bool isDelegatingConstructor() const {
  return (getNumCtorInitializers() == 1) &&
         init_begin()[0]->isDelegatingInitializer();
}

/// When this constructor delegates to another, retrieve the target.
CXXConstructorDecl *getTargetConstructor() const;

/// Whether this constructor is a default
/// constructor (C++ [class.ctor]p5), which can be used to
/// default-initialize a class of this type.
bool isDefaultConstructor() const;

/// Whether this constructor is a copy constructor (C++ [class.copy]p2,
/// which can be used to copy the class.
///
/// \p TypeQuals will be set to the qualifiers on the
/// argument type. For example, \p TypeQuals would be set to \c
/// Qualifiers::Const for the following copy constructor:
///
/// \code
/// class X {
/// public:
///   X(const X&);
/// };
/// \endcode
bool isCopyConstructor(unsigned &TypeQuals) const;

/// Whether this constructor is a copy
/// constructor (C++ [class.copy]p2, which can be used to copy the
/// class.
bool isCopyConstructor() const {
  unsigned TypeQuals = 0;
  return isCopyConstructor(TypeQuals);
}

/// Determine whether this constructor is a move constructor
/// (C++11 [class.copy]p3), which can be used to move values of the class.
///
/// \param TypeQuals If this constructor is a move constructor, will be set
/// to the type qualifiers on the referent of the first parameter's type.
bool isMoveConstructor(unsigned &TypeQuals) const;

/// Determine whether this constructor is a move constructor
/// (C++11 [class.copy]p3), which can be used to move values of the class.
bool isMoveConstructor() const {
  unsigned TypeQuals = 0;
  return isMoveConstructor(TypeQuals);
}

/// Determine whether this is a copy or move constructor.
///
/// \param TypeQuals Will be set to the type qualifiers on the reference
/// parameter, if in fact this is a copy or move constructor.
bool isCopyOrMoveConstructor(unsigned &TypeQuals) const;

/// Determine whether this a copy or move constructor.
bool isCopyOrMoveConstructor() const {
  unsigned Quals;
  return isCopyOrMoveConstructor(Quals);
}

/// Whether this constructor is a
/// converting constructor (C++ [class.conv.ctor]), which can be
/// used for user-defined conversions.
bool isConvertingConstructor(bool AllowExplicit) const;

/// Determine whether this is a member template specialization that
/// would copy the object to itself. Such constructors are never used to copy
/// an object.
bool isSpecializationCopyingObject() const;

/// Determine whether this is an implicit constructor synthesized to
/// model a call to a constructor inherited from a base class.
bool isInheritingConstructor() const {
  return CXXConstructorDeclBits.IsInheritingConstructor;
}

/// State that this is an implicit constructor synthesized to
/// model a call to a constructor inherited from a base class.
void setInheritingConstructor(bool isIC = true) {
  CXXConstructorDeclBits.IsInheritingConstructor = isIC;
}

/// Get the constructor that this inheriting constructor is based on.
InheritedConstructor getInheritedConstructor() const {
  return isInheritingConstructor() ?
    *getTrailingObjects<InheritedConstructor>() : InheritedConstructor();
}

CXXConstructorDecl *getCanonicalDecl() override {
  return cast<CXXConstructorDecl>(FunctionDecl::getCanonicalDecl());
}
const CXXConstructorDecl *getCanonicalDecl() const {
  return const_cast<CXXConstructorDecl*>(this)->getCanonicalDecl();
}

// Implement isa/cast/dyncast/etc.
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == CXXConstructor; }
2801};

2803/// Represents a C++ destructor within a class.
2804///
2805/// For example:
2806///
2807/// \code
2808/// class X {
2809/// public:
2810///   ~X(); // represented by a CXXDestructorDecl.
2811/// };
2812/// \endcode
2813class CXXDestructorDecl : public CXXMethodDecl {
friend class ASTDeclReader;
friend class ASTDeclWriter;

// FIXME: Don't allocate storage for these except in the first declaration
// of a virtual destructor.
FunctionDecl *OperatorDelete = nullptr;
Expr *OperatorDeleteThisArg = nullptr;

CXXDestructorDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
                  const DeclarationNameInfo &NameInfo, QualType T,
                  TypeSourceInfo *TInfo, bool isInline,
                  bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind)
    : CXXMethodDecl(CXXDestructor, C, RD, StartLoc, NameInfo, T, TInfo,
                    SC_None, isInline, ConstexprKind, SourceLocation()) {
  setImplicit(isImplicitlyDeclared);
}

void anchor() override;

2833public:
static CXXDestructorDecl *Create(ASTContext &C, CXXRecordDecl *RD,
                                 SourceLocation StartLoc,
                                 const DeclarationNameInfo &NameInfo,
                                 QualType T, TypeSourceInfo *TInfo,
                                 bool isInline, bool isImplicitlyDeclared,
                                 ConstexprSpecKind ConstexprKind);
static CXXDestructorDecl *CreateDeserialized(ASTContext & C, unsigned ID);

void setOperatorDelete(FunctionDecl *OD, Expr *ThisArg);

const FunctionDecl *getOperatorDelete() const {
  return getCanonicalDecl()->OperatorDelete;
}

Expr *getOperatorDeleteThisArg() const {
  return getCanonicalDecl()->OperatorDeleteThisArg;
}

CXXDestructorDecl *getCanonicalDecl() override {
  return cast<CXXDestructorDecl>(FunctionDecl::getCanonicalDecl());
}
const CXXDestructorDecl *getCanonicalDecl() const {
  return const_cast<CXXDestructorDecl*>(this)->getCanonicalDecl();
}

// Implement isa/cast/dyncast/etc.
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == CXXDestructor; }
2862};

2864/// Represents a C++ conversion function within a class.
2865///
2866/// For example:
2867///
2868/// \code
2869/// class X {
2870/// public:
2871///   operator bool();
2872/// };
2873/// \endcode
2874class CXXConversionDecl : public CXXMethodDecl {
CXXConversionDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
                  const DeclarationNameInfo &NameInfo, QualType T,
                  TypeSourceInfo *TInfo, bool isInline, ExplicitSpecifier ES,
                  ConstexprSpecKind ConstexprKind, SourceLocation EndLocation)
    : CXXMethodDecl(CXXConversion, C, RD, StartLoc, NameInfo, T, TInfo,
                    SC_None, isInline, ConstexprKind, EndLocation),
      ExplicitSpec(ES) {}
void anchor() override;

ExplicitSpecifier ExplicitSpec;

void setExplicitSpecifier(ExplicitSpecifier ES) { ExplicitSpec = ES; }

2888public:
friend class ASTDeclReader;
friend class ASTDeclWriter;

static CXXConversionDecl *
Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc,
       const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo,
       bool isInline, ExplicitSpecifier ES, ConstexprSpecKind ConstexprKind,
       SourceLocation EndLocation);
static CXXConversionDecl *CreateDeserialized(ASTContext &C, unsigned ID);

ExplicitSpecifier getExplicitSpecifier() {
  return getCanonicalDecl()->ExplicitSpec;
}

const ExplicitSpecifier getExplicitSpecifier() const {
  return getCanonicalDecl()->ExplicitSpec;
}

/// Return true if the declartion is already resolved to be explicit.
bool isExplicit() const { return getExplicitSpecifier().isExplicit(); }

/// Returns the type that this conversion function is converting to.
QualType getConversionType() const {
  return getType()->castAs<FunctionType>()->getReturnType();
}

/// Determine whether this conversion function is a conversion from
/// a lambda closure type to a block pointer.
bool isLambdaToBlockPointerConversion() const;

CXXConversionDecl *getCanonicalDecl() override {
  return cast<CXXConversionDecl>(FunctionDecl::getCanonicalDecl());
}
const CXXConversionDecl *getCanonicalDecl() const {
  return const_cast<CXXConversionDecl*>(this)->getCanonicalDecl();
}

// Implement isa/cast/dyncast/etc.
static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == CXXConversion; }
2929};

2931/// Represents a linkage specification.
2932///
2933/// For example:
2934/// \code
2935///   extern "C" void foo();
2936/// \endcode
2937class LinkageSpecDecl : public Decl, public DeclContext {
virtual void anchor();
// This class stores some data in DeclContext::LinkageSpecDeclBits to save
// some space. Use the provided accessors to access it.
2941public:
/// Represents the language in a linkage specification.
///
/// The values are part of the serialization ABI for
/// ASTs and cannot be changed without altering that ABI.  To help
/// ensure a stable ABI for this, we choose the DW_LANG_ encodings
/// from the dwarf standard.
enum LanguageIDs {
  lang_c = llvm::dwarf::DW_LANG_C,
  lang_cxx = llvm::dwarf::DW_LANG_C_plus_plus,
  lang_cxx_11 = llvm::dwarf::DW_LANG_C_plus_plus_11,
  lang_cxx_14 = llvm::dwarf::DW_LANG_C_plus_plus_14
};

2955private:
/// The source location for the extern keyword.
SourceLocation ExternLoc;

/// The source location for the right brace (if valid).
SourceLocation RBraceLoc;

LinkageSpecDecl(DeclContext *DC, SourceLocation ExternLoc,
                SourceLocation LangLoc, LanguageIDs lang, bool HasBraces);

2965public:
static LinkageSpecDecl *Create(ASTContext &C, DeclContext *DC,
                               SourceLocation ExternLoc,
                               SourceLocation LangLoc, LanguageIDs Lang,
                               bool HasBraces);
static LinkageSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID);

/// Return the language specified by this linkage specification.
LanguageIDs getLanguage() const {
  return static_cast<LanguageIDs>(LinkageSpecDeclBits.Language);
}

/// Set the language specified by this linkage specification.
void setLanguage(LanguageIDs L) { LinkageSpecDeclBits.Language = L; }

/// Determines whether this linkage specification had braces in
/// its syntactic form.
bool hasBraces() const {
  assert(!RBraceLoc.isValid() || LinkageSpecDeclBits.HasBraces)((!RBraceLoc.isValid() || LinkageSpecDeclBits.HasBraces) ? static_cast
<void> (0) : __assert_fail ("!RBraceLoc.isValid() || LinkageSpecDeclBits.HasBraces"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 2983, __PRETTY_FUNCTION__));
  return LinkageSpecDeclBits.HasBraces;
}

SourceLocation getExternLoc() const { return ExternLoc; }
SourceLocation getRBraceLoc() const { return RBraceLoc; }
void setExternLoc(SourceLocation L) { ExternLoc = L; }
void setRBraceLoc(SourceLocation L) {
  RBraceLoc = L;
  LinkageSpecDeclBits.HasBraces = RBraceLoc.isValid();
}

SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) {
  if (hasBraces())
    return getRBraceLoc();
  // No braces: get the end location of the (only) declaration in context
  // (if present).
  return decls_empty() ? getLocation() : decls_begin()->getEndLoc();
}

SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) {
  return SourceRange(ExternLoc, getEndLoc());
}

static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == LinkageSpec; }

static DeclContext *castToDeclContext(const LinkageSpecDecl *D) {
  return static_cast<DeclContext *>(const_cast<LinkageSpecDecl*>(D));
}

static LinkageSpecDecl *castFromDeclContext(const DeclContext *DC) {
  return static_cast<LinkageSpecDecl *>(const_cast<DeclContext*>(DC));
}
3017};

3019/// Represents C++ using-directive.
3020///
3021/// For example:
3022/// \code
3023///    using namespace std;
3024/// \endcode
3025///
3026/// \note UsingDirectiveDecl should be Decl not NamedDecl, but we provide
3027/// artificial names for all using-directives in order to store
3028/// them in DeclContext effectively.
3029class UsingDirectiveDecl : public NamedDecl {
/// The location of the \c using keyword.
SourceLocation UsingLoc;

/// The location of the \c namespace keyword.
SourceLocation NamespaceLoc;

/// The nested-name-specifier that precedes the namespace.
NestedNameSpecifierLoc QualifierLoc;

/// The namespace nominated by this using-directive.
NamedDecl *NominatedNamespace;

/// Enclosing context containing both using-directive and nominated
/// namespace.
DeclContext *CommonAncestor;

UsingDirectiveDecl(DeclContext *DC, SourceLocation UsingLoc,
                   SourceLocation NamespcLoc,
                   NestedNameSpecifierLoc QualifierLoc,
                   SourceLocation IdentLoc,
                   NamedDecl *Nominated,
                   DeclContext *CommonAncestor)
    : NamedDecl(UsingDirective, DC, IdentLoc, getName()), UsingLoc(UsingLoc),
      NamespaceLoc(NamespcLoc), QualifierLoc(QualifierLoc),
      NominatedNamespace(Nominated), CommonAncestor(CommonAncestor) {}

/// Returns special DeclarationName used by using-directives.
///
/// This is only used by DeclContext for storing UsingDirectiveDecls in
/// its lookup structure.
static DeclarationName getName() {
  return DeclarationName::getUsingDirectiveName();
}

void anchor() override;

3066public:
friend class ASTDeclReader;

// Friend for getUsingDirectiveName.
friend class DeclContext;

/// Retrieve the nested-name-specifier that qualifies the
/// name of the namespace, with source-location information.
NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }

/// Retrieve the nested-name-specifier that qualifies the
/// name of the namespace.
NestedNameSpecifier *getQualifier() const {
  return QualifierLoc.getNestedNameSpecifier();
}

NamedDecl *getNominatedNamespaceAsWritten() { return NominatedNamespace; }
const NamedDecl *getNominatedNamespaceAsWritten() const {
  return NominatedNamespace;
}

/// Returns the namespace nominated by this using-directive.
NamespaceDecl *getNominatedNamespace();

const NamespaceDecl *getNominatedNamespace() const {
  return const_cast<UsingDirectiveDecl*>(this)->getNominatedNamespace();
}

/// Returns the common ancestor context of this using-directive and
/// its nominated namespace.
DeclContext *getCommonAncestor() { return CommonAncestor; }
const DeclContext *getCommonAncestor() const { return CommonAncestor; }

/// Return the location of the \c using keyword.
SourceLocation getUsingLoc() const { return UsingLoc; }

// FIXME: Could omit 'Key' in name.
/// Returns the location of the \c namespace keyword.
SourceLocation getNamespaceKeyLocation() const { return NamespaceLoc; }

/// Returns the location of this using declaration's identifier.
SourceLocation getIdentLocation() const { return getLocation(); }

static UsingDirectiveDecl *Create(ASTContext &C, DeclContext *DC,
                                  SourceLocation UsingLoc,
                                  SourceLocation NamespaceLoc,
                                  NestedNameSpecifierLoc QualifierLoc,
                                  SourceLocation IdentLoc,
                                  NamedDecl *Nominated,
                                  DeclContext *CommonAncestor);
static UsingDirectiveDecl *CreateDeserialized(ASTContext &C, unsigned ID);

SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) {
  return SourceRange(UsingLoc, getLocation());
}

static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == UsingDirective; }
3124};

3126/// Represents a C++ namespace alias.
3127///
3128/// For example:
3129///
3130/// \code
3131/// namespace Foo = Bar;
3132/// \endcode
3133class NamespaceAliasDecl : public NamedDecl,
                         public Redeclarable<NamespaceAliasDecl> {
friend class ASTDeclReader;

/// The location of the \c namespace keyword.
SourceLocation NamespaceLoc;

/// The location of the namespace's identifier.
///
/// This is accessed by TargetNameLoc.
SourceLocation IdentLoc;

/// The nested-name-specifier that precedes the namespace.
NestedNameSpecifierLoc QualifierLoc;

/// The Decl that this alias points to, either a NamespaceDecl or
/// a NamespaceAliasDecl.
NamedDecl *Namespace;

NamespaceAliasDecl(ASTContext &C, DeclContext *DC,
                   SourceLocation NamespaceLoc, SourceLocation AliasLoc,
                   IdentifierInfo *Alias, NestedNameSpecifierLoc QualifierLoc,
                   SourceLocation IdentLoc, NamedDecl *Namespace)
    : NamedDecl(NamespaceAlias, DC, AliasLoc, Alias), redeclarable_base(C),
      NamespaceLoc(NamespaceLoc), IdentLoc(IdentLoc),
      QualifierLoc(QualifierLoc), Namespace(Namespace) {}

void anchor() override;

using redeclarable_base = Redeclarable<NamespaceAliasDecl>;

NamespaceAliasDecl *getNextRedeclarationImpl() override;
NamespaceAliasDecl *getPreviousDeclImpl() override;
NamespaceAliasDecl *getMostRecentDeclImpl() override;

3168public:
static NamespaceAliasDecl *Create(ASTContext &C, DeclContext *DC,
                                  SourceLocation NamespaceLoc,
                                  SourceLocation AliasLoc,
                                  IdentifierInfo *Alias,
                                  NestedNameSpecifierLoc QualifierLoc,
                                  SourceLocation IdentLoc,
                                  NamedDecl *Namespace);

static NamespaceAliasDecl *CreateDeserialized(ASTContext &C, unsigned ID);

using redecl_range = redeclarable_base::redecl_range;
using redecl_iterator = redeclarable_base::redecl_iterator;

using redeclarable_base::redecls_begin;
using redeclarable_base::redecls_end;
using redeclarable_base::redecls;
using redeclarable_base::getPreviousDecl;
using redeclarable_base::getMostRecentDecl;

NamespaceAliasDecl *getCanonicalDecl() override {
  return getFirstDecl();
}
const NamespaceAliasDecl *getCanonicalDecl() const {
  return getFirstDecl();
}

/// Retrieve the nested-name-specifier that qualifies the
/// name of the namespace, with source-location information.
NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }

/// Retrieve the nested-name-specifier that qualifies the
/// name of the namespace.
NestedNameSpecifier *getQualifier() const {
  return QualifierLoc.getNestedNameSpecifier();
}

/// Retrieve the namespace declaration aliased by this directive.
NamespaceDecl *getNamespace() {
  if (auto *AD = dyn_cast<NamespaceAliasDecl>(Namespace))
    return AD->getNamespace();

  return cast<NamespaceDecl>(Namespace);
}

const NamespaceDecl *getNamespace() const {
  return const_cast<NamespaceAliasDecl *>(this)->getNamespace();
}

/// Returns the location of the alias name, i.e. 'foo' in
/// "namespace foo = ns::bar;".
SourceLocation getAliasLoc() const { return getLocation(); }

/// Returns the location of the \c namespace keyword.
SourceLocation getNamespaceLoc() const { return NamespaceLoc; }

/// Returns the location of the identifier in the named namespace.
SourceLocation getTargetNameLoc() const { return IdentLoc; }

/// Retrieve the namespace that this alias refers to, which
/// may either be a NamespaceDecl or a NamespaceAliasDecl.
NamedDecl *getAliasedNamespace() const { return Namespace; }

SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) {
  return SourceRange(NamespaceLoc, IdentLoc);
}

static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == NamespaceAlias; }
3237};

3239/// Represents a shadow declaration introduced into a scope by a
3240/// (resolved) using declaration.
3241///
3242/// For example,
3243/// \code
3244/// namespace A {
3245///   void foo();
3246/// }
3247/// namespace B {
3248///   using A::foo; // <- a UsingDecl
3249///                 // Also creates a UsingShadowDecl for A::foo() in B
3250/// }
3251/// \endcode
3252class UsingShadowDecl : public NamedDecl, public Redeclarable<UsingShadowDecl> {
friend class UsingDecl;

/// The referenced declaration.
NamedDecl *Underlying = nullptr;

/// The using declaration which introduced this decl or the next using
/// shadow declaration contained in the aforementioned using declaration.
NamedDecl *UsingOrNextShadow = nullptr;

void anchor() override;

using redeclarable_base = Redeclarable<UsingShadowDecl>;

UsingShadowDecl *getNextRedeclarationImpl() override {
  return getNextRedeclaration();
}

UsingShadowDecl *getPreviousDeclImpl() override {
  return getPreviousDecl();
}

UsingShadowDecl *getMostRecentDeclImpl() override {
  return getMostRecentDecl();
}

3278protected:
UsingShadowDecl(Kind K, ASTContext &C, DeclContext *DC, SourceLocation Loc,
                UsingDecl *Using, NamedDecl *Target);
UsingShadowDecl(Kind K, ASTContext &C, EmptyShell);

3283public:
friend class ASTDeclReader;
friend class ASTDeclWriter;

static UsingShadowDecl *Create(ASTContext &C, DeclContext *DC,
                               SourceLocation Loc, UsingDecl *Using,
                               NamedDecl *Target) {
  return new (C, DC) UsingShadowDecl(UsingShadow, C, DC, Loc, Using, Target);
}

static UsingShadowDecl *CreateDeserialized(ASTContext &C, unsigned ID);

using redecl_range = redeclarable_base::redecl_range;
using redecl_iterator = redeclarable_base::redecl_iterator;

using redeclarable_base::redecls_begin;
using redeclarable_base::redecls_end;
using redeclarable_base::redecls;
using redeclarable_base::getPreviousDecl;
using redeclarable_base::getMostRecentDecl;
using redeclarable_base::isFirstDecl;

UsingShadowDecl *getCanonicalDecl() override {
  return getFirstDecl();
}
const UsingShadowDecl *getCanonicalDecl() const {
  return getFirstDecl();
}

/// Gets the underlying declaration which has been brought into the
/// local scope.
NamedDecl *getTargetDecl() const { return Underlying; }

/// Sets the underlying declaration which has been brought into the
/// local scope.
void setTargetDecl(NamedDecl *ND) {
  assert(ND && "Target decl is null!")((ND && "Target decl is null!") ? static_cast<void
> (0) : __assert_fail ("ND && \"Target decl is null!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/DeclCXX.h"
, 3319, __PRETTY_FUNCTION__));
  Underlying = ND;
  // A UsingShadowDecl is never a friend or local extern declaration, even
  // if it is a shadow declaration for one.
  IdentifierNamespace =
      ND->getIdentifierNamespace() &
      ~(IDNS_OrdinaryFriend | IDNS_TagFriend | IDNS_LocalExtern);
}

/// Gets the using declaration to which this declaration is tied.
UsingDecl *getUsingDecl() const;

/// The next using shadow declaration contained in the shadow decl
/// chain of the using declaration which introduced this decl.
UsingShadowDecl *getNextUsingShadowDecl() const {
  return dyn_cast_or_null<UsingShadowDecl>(UsingOrNextShadow);
}

static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) {
  return K == Decl::UsingShadow || K == Decl::ConstructorUsingShadow;
}
3341};

3343/// Represents a shadow constructor declaration introduced into a
3344/// class by a C++11 using-declaration that names a constructor.
3345///
3346/// For example:
3347/// \code
3348/// struct Base { Base(int); };
3349/// struct Derived {
3350///    using Base::Base; // creates a UsingDecl and a ConstructorUsingShadowDecl
3351/// };
3352/// \endcode
3353class ConstructorUsingShadowDecl final : public UsingShadowDecl {
/// If this constructor using declaration inherted the constructor
/// from an indirect base class, this is the ConstructorUsingShadowDecl
/// in the named direct base class from which the declaration was inherited.
ConstructorUsingShadowDecl *NominatedBaseClassShadowDecl = nullptr;

/// If this constructor using declaration inherted the constructor
/// from an indirect base class, this is the ConstructorUsingShadowDecl
/// that will be used to construct the unique direct or virtual base class
/// that receives the constructor arguments.
ConstructorUsingShadowDecl *ConstructedBaseClassShadowDecl = nullptr;

/// \c true if the constructor ultimately named by this using shadow
/// declaration is within a virtual base class subobject of the class that
/// contains this declaration.
unsigned IsVirtual : 1;

ConstructorUsingShadowDecl(ASTContext &C, DeclContext *DC, SourceLocation Loc,
                           UsingDecl *Using, NamedDecl *Target,
                           bool TargetInVirtualBase)
    : UsingShadowDecl(ConstructorUsingShadow, C, DC, Loc, Using,
                      Target->getUnderlyingDecl()),
      NominatedBaseClassShadowDecl(
          dyn_cast<ConstructorUsingShadowDecl>(Target)),
      ConstructedBaseClassShadowDecl(NominatedBaseClassShadowDecl),
      IsVirtual(TargetInVirtualBase) {
  // If we found a constructor that chains to a constructor for a virtual
  // base, we should directly call that virtual base constructor instead.
  // FIXME: This logic belongs in Sema.
  if (NominatedBaseClassShadowDecl &&
      NominatedBaseClassShadowDecl->constructsVirtualBase()) {
    ConstructedBaseClassShadowDecl =
        NominatedBaseClassShadowDecl->ConstructedBaseClassShadowDecl;
    IsVirtual = true;
  }
}

ConstructorUsingShadowDecl(ASTContext &C, EmptyShell Empty)
    : UsingShadowDecl(ConstructorUsingShadow, C, Empty), IsVirtual(false) {}

void anchor() override;

3395public:
friend class ASTDeclReader;
friend class ASTDeclWriter;

static ConstructorUsingShadowDecl *Create(ASTContext &C, DeclContext *DC,
                                          SourceLocation Loc,
                                          UsingDecl *Using, NamedDecl *Target,
                                          bool IsVirtual);
static ConstructorUsingShadowDecl *CreateDeserialized(ASTContext &C,
                                                      unsigned ID);

/// Returns the parent of this using shadow declaration, which
/// is the class in which this is declared.
//@{
const CXXRecordDecl *getParent() const {
  return cast<CXXRecordDecl>(getDeclContext());
}
CXXRecordDecl *getParent() {
  return cast<CXXRecordDecl>(getDeclContext());
}
//@}

/// Get the inheriting constructor declaration for the direct base
/// class from which this using shadow declaration was inherited, if there is
/// one. This can be different for each redeclaration of the same shadow decl.
ConstructorUsingShadowDecl *getNominatedBaseClassShadowDecl() const {
  return NominatedBaseClassShadowDecl;
}

/// Get the inheriting constructor declaration for the base class
/// for which we don't have an explicit initializer, if there is one.
ConstructorUsingShadowDecl *getConstructedBaseClassShadowDecl() const {
  return ConstructedBaseClassShadowDecl;
}

/// Get the base class that was named in the using declaration. This
/// can be different for each redeclaration of this same shadow decl.
CXXRecordDecl *getNominatedBaseClass() const;

/// Get the base class whose constructor or constructor shadow
/// declaration is passed the constructor arguments.
CXXRecordDecl *getConstructedBaseClass() const {
  return cast<CXXRecordDecl>((ConstructedBaseClassShadowDecl
                                  ? ConstructedBaseClassShadowDecl
                                  : getTargetDecl())
                                 ->getDeclContext());
}

/// Returns \c true if the constructed base class is a virtual base
/// class subobject of this declaration's class.
bool constructsVirtualBase() const {
  return IsVirtual;
}

static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == ConstructorUsingShadow; }
3451};

3453/// Represents a C++ using-declaration.
3454///
3455/// For example:
3456/// \code
3457///    using someNameSpace::someIdentifier;
3458/// \endcode
3459class UsingDecl : public NamedDecl, public Mergeable<UsingDecl> {
/// The source location of the 'using' keyword itself.
SourceLocation UsingLocation;

/// The nested-name-specifier that precedes the name.
NestedNameSpecifierLoc QualifierLoc;

/// Provides source/type location info for the declaration name
/// embedded in the ValueDecl base class.
DeclarationNameLoc DNLoc;

/// The first shadow declaration of the shadow decl chain associated
/// with this using declaration.
///
/// The bool member of the pair store whether this decl has the \c typename
/// keyword.
llvm::PointerIntPair<UsingShadowDecl *, 1, bool> FirstUsingShadow;

UsingDecl(DeclContext *DC, SourceLocation UL,
          NestedNameSpecifierLoc QualifierLoc,
          const DeclarationNameInfo &NameInfo, bool HasTypenameKeyword)
  : NamedDecl(Using, DC, NameInfo.getLoc(), NameInfo.getName()),
    UsingLocation(UL), QualifierLoc(QualifierLoc),
    DNLoc(NameInfo.getInfo()), FirstUsingShadow(nullptr, HasTypenameKeyword) {
}

void anchor() override;

3487public:
friend class ASTDeclReader;
friend class ASTDeclWriter;

/// Return the source location of the 'using' keyword.
SourceLocation getUsingLoc() const { return UsingLocation; }

/// Set the source location of the 'using' keyword.
void setUsingLoc(SourceLocation L) { UsingLocation = L; }

/// Retrieve the nested-name-specifier that qualifies the name,
/// with source-location information.
NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }

/// Retrieve the nested-name-specifier that qualifies the name.
NestedNameSpecifier *getQualifier() const {
  return QualifierLoc.getNestedNameSpecifier();
}

DeclarationNameInfo getNameInfo() const {
  return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc);
}

/// Return true if it is a C++03 access declaration (no 'using').
bool isAccessDeclaration() const { return UsingLocation.isInvalid(); }

/// Return true if the using declaration has 'typename'.
bool hasTypename() const { return FirstUsingShadow.getInt(); }

/// Sets whether the using declaration has 'typename'.
void setTypename(bool TN) { FirstUsingShadow.setInt(TN); }

/// Iterates through the using shadow declarations associated with
/// this using declaration.
class shadow_iterator {
  /// The current using shadow declaration.
  UsingShadowDecl *Current = nullptr;

public:
  using value_type = UsingShadowDecl *;
  using reference = UsingShadowDecl *;
  using pointer = UsingShadowDecl *;
  using iterator_category = std::forward_iterator_tag;
  using difference_type = std::ptrdiff_t;

  shadow_iterator() = default;
  explicit shadow_iterator(UsingShadowDecl *C) : Current(C) {}

  reference operator*() const { return Current; }
  pointer operator->() const { return Current; }

  shadow_iterator& operator++() {
    Current = Current->getNextUsingShadowDecl();
    return *this;
  }

  shadow_iterator operator++(int) {
    shadow_iterator tmp(*this);
    ++(*this);
    return tmp;
  }

  friend bool operator==(shadow_iterator x, shadow_iterator y) {
    return x.Current == y.Current;
  }
  friend bool operator!=(shadow_iterator x, shadow_iterator y) {
    return x.Current != y.Current;
  }
};

using shadow_range = llvm::iterator_range<shadow_iterator>;

shadow_range shadows() const {
  return shadow_range(shadow_begin(), shadow_end());
}

shadow_iterator shadow_begin() const {
  return shadow_iterator(FirstUsingShadow.getPointer());
}

shadow_iterator shadow_end() const { return shadow_iterator(); }

/// Return the number of shadowed declarations associated with this
/// using declaration.
unsigned shadow_size() const {
  return std::distance(shadow_begin(), shadow_end());
}

void addShadowDecl(UsingShadowDecl *S);
void removeShadowDecl(UsingShadowDecl *S);

static UsingDecl *Create(ASTContext &C, DeclContext *DC,
                         SourceLocation UsingL,
                         NestedNameSpecifierLoc QualifierLoc,
                         const DeclarationNameInfo &NameInfo,
                         bool HasTypenameKeyword);

static UsingDecl *CreateDeserialized(ASTContext &C, unsigned ID);

SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__));

/// Retrieves the canonical declaration of this declaration.
UsingDecl *getCanonicalDecl() override { return getFirstDecl(); }
const UsingDecl *getCanonicalDecl() const { return getFirstDecl(); }

static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == Using; }
3594};

3596/// Represents a pack of using declarations that a single
3597/// using-declarator pack-expanded into.
3598///
3599/// \code
3600/// template<typename ...T> struct X : T... {
3601///   using T::operator()...;
3602///   using T::operator T...;
3603/// };
3604/// \endcode
3605///
3606/// In the second case above, the UsingPackDecl will have the name
3607/// 'operator T' (which contains an unexpanded pack), but the individual
3608/// UsingDecls and UsingShadowDecls will have more reasonable names.
3609class UsingPackDecl final
  : public NamedDecl, public Mergeable<UsingPackDecl>,
    private llvm::TrailingObjects<UsingPackDecl, NamedDecl *> {
/// The UnresolvedUsingValueDecl or UnresolvedUsingTypenameDecl from
/// which this waas instantiated.
NamedDecl *InstantiatedFrom;

/// The number of using-declarations created by this pack expansion.
unsigned NumExpansions;

UsingPackDecl(DeclContext *DC, NamedDecl *InstantiatedFrom,
              ArrayRef<NamedDecl *> UsingDecls)
    : NamedDecl(UsingPack, DC,
                InstantiatedFrom ? InstantiatedFrom->getLocation()
                                 : SourceLocation(),
                InstantiatedFrom ? InstantiatedFrom->getDeclName()
                                 : DeclarationName()),
      InstantiatedFrom(InstantiatedFrom), NumExpansions(UsingDecls.size()) {
  std::uninitialized_copy(UsingDecls.begin(), UsingDecls.end(),
                          getTrailingObjects<NamedDecl *>());
}

void anchor() override;

3633public:
friend class ASTDeclReader;
friend class ASTDeclWriter;
friend TrailingObjects;

/// Get the using declaration from which this was instantiated. This will
/// always be an UnresolvedUsingValueDecl or an UnresolvedUsingTypenameDecl
/// that is a pack expansion.
NamedDecl *getInstantiatedFromUsingDecl() const { return InstantiatedFrom; }

/// Get the set of using declarations that this pack expanded into. Note that
/// some of these may still be unresolved.
ArrayRef<NamedDecl *> expansions() const {
  return llvm::makeArrayRef(getTrailingObjects<NamedDecl *>(), NumExpansions);
}

static UsingPackDecl *Create(ASTContext &C, DeclContext *DC,
                             NamedDecl *InstantiatedFrom,
                             ArrayRef<NamedDecl *> UsingDecls);

static UsingPackDecl *CreateDeserialized(ASTContext &C, unsigned ID,
                                         unsigned NumExpansions);

SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) {
  return InstantiatedFrom->getSourceRange();
}

UsingPackDecl *getCanonicalDecl() override { return getFirstDecl(); }
const UsingPackDecl *getCanonicalDecl() const { return getFirstDecl(); }

static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == UsingPack; }
3665};

3667/// Represents a dependent using declaration which was not marked with
3668/// \c typename.
3669///
3670/// Unlike non-dependent using declarations, these *only* bring through
3671/// non-types; otherwise they would break two-phase lookup.
3672///
3673/// \code
3674/// template \<class T> class A : public Base<T> {
3675///   using Base<T>::foo;
3676/// };
3677/// \endcode
3678class UnresolvedUsingValueDecl : public ValueDecl,
                               public Mergeable<UnresolvedUsingValueDecl> {
/// The source location of the 'using' keyword
SourceLocation UsingLocation;

/// If this is a pack expansion, the location of the '...'.
SourceLocation EllipsisLoc;

/// The nested-name-specifier that precedes the name.
NestedNameSpecifierLoc QualifierLoc;

/// Provides source/type location info for the declaration name
/// embedded in the ValueDecl base class.
DeclarationNameLoc DNLoc;

UnresolvedUsingValueDecl(DeclContext *DC, QualType Ty,
                         SourceLocation UsingLoc,
                         NestedNameSpecifierLoc QualifierLoc,
                         const DeclarationNameInfo &NameInfo,
                         SourceLocation EllipsisLoc)
    : ValueDecl(UnresolvedUsingValue, DC,
                NameInfo.getLoc(), NameInfo.getName(), Ty),
      UsingLocation(UsingLoc), EllipsisLoc(EllipsisLoc),
      QualifierLoc(QualifierLoc), DNLoc(NameInfo.getInfo()) {}

void anchor() override;

3705public:
friend class ASTDeclReader;
friend class ASTDeclWriter;

/// Returns the source location of the 'using' keyword.
SourceLocation getUsingLoc() const { return UsingLocation; }

/// Set the source location of the 'using' keyword.
void setUsingLoc(SourceLocation L) { UsingLocation = L; }

/// Return true if it is a C++03 access declaration (no 'using').
bool isAccessDeclaration() const { return UsingLocation.isInvalid(); }

/// Retrieve the nested-name-specifier that qualifies the name,
/// with source-location information.
NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }

/// Retrieve the nested-name-specifier that qualifies the name.
NestedNameSpecifier *getQualifier() const {
  return QualifierLoc.getNestedNameSpecifier();
}

DeclarationNameInfo getNameInfo() const {
  return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc);
}

/// Determine whether this is a pack expansion.
bool isPackExpansion() const {
  return EllipsisLoc.isValid();
}

/// Get the location of the ellipsis if this is a pack expansion.
SourceLocation getEllipsisLoc() const {
  return EllipsisLoc;
}

static UnresolvedUsingValueDecl *
  Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc,
         NestedNameSpecifierLoc QualifierLoc,
         const DeclarationNameInfo &NameInfo, SourceLocation EllipsisLoc);

static UnresolvedUsingValueDecl *
CreateDeserialized(ASTContext &C, unsigned ID);

SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__));

/// Retrieves the canonical declaration of this declaration.
UnresolvedUsingValueDecl *getCanonicalDecl() override {
  return getFirstDecl();
}
const UnresolvedUsingValueDecl *getCanonicalDecl() const {
  return getFirstDecl();
}

static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == UnresolvedUsingValue; }
3761};

3763/// Represents a dependent using declaration which was marked with
3764/// \c typename.
3765///
3766/// \code
3767/// template \<class T> class A : public Base<T> {
3768///   using typename Base<T>::foo;
3769/// };
3770/// \endcode
3771///
3772/// The type associated with an unresolved using typename decl is
3773/// currently always a typename type.
3774class UnresolvedUsingTypenameDecl
  : public TypeDecl,
    public Mergeable<UnresolvedUsingTypenameDecl> {
friend class ASTDeclReader;

/// The source location of the 'typename' keyword
SourceLocation TypenameLocation;

/// If this is a pack expansion, the location of the '...'.
SourceLocation EllipsisLoc;

/// The nested-name-specifier that precedes the name.
NestedNameSpecifierLoc QualifierLoc;

UnresolvedUsingTypenameDecl(DeclContext *DC, SourceLocation UsingLoc,
                            SourceLocation TypenameLoc,
                            NestedNameSpecifierLoc QualifierLoc,
                            SourceLocation TargetNameLoc,
                            IdentifierInfo *TargetName,
                            SourceLocation EllipsisLoc)
  : TypeDecl(UnresolvedUsingTypename, DC, TargetNameLoc, TargetName,
             UsingLoc),
    TypenameLocation(TypenameLoc), EllipsisLoc(EllipsisLoc),
    QualifierLoc(QualifierLoc) {}

void anchor() override;

3801public:
/// Returns the source location of the 'using' keyword.
SourceLocation getUsingLoc() const { return getBeginLoc(); }

/// Returns the source location of the 'typename' keyword.
SourceLocation getTypenameLoc() const { return TypenameLocation; }

/// Retrieve the nested-name-specifier that qualifies the name,
/// with source-location information.
NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; }

/// Retrieve the nested-name-specifier that qualifies the name.
NestedNameSpecifier *getQualifier() const {
  return QualifierLoc.getNestedNameSpecifier();
}

DeclarationNameInfo getNameInfo() const {
  return DeclarationNameInfo(getDeclName(), getLocation());
}

/// Determine whether this is a pack expansion.
bool isPackExpansion() const {
  return EllipsisLoc.isValid();
}

/// Get the location of the ellipsis if this is a pack expansion.
SourceLocation getEllipsisLoc() const {
  return EllipsisLoc;
}

static UnresolvedUsingTypenameDecl *
  Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc,
         SourceLocation TypenameLoc, NestedNameSpecifierLoc QualifierLoc,
         SourceLocation TargetNameLoc, DeclarationName TargetName,
         SourceLocation EllipsisLoc);

static UnresolvedUsingTypenameDecl *
CreateDeserialized(ASTContext &C, unsigned ID);

/// Retrieves the canonical declaration of this declaration.
UnresolvedUsingTypenameDecl *getCanonicalDecl() override {
  return getFirstDecl();
}
const UnresolvedUsingTypenameDecl *getCanonicalDecl() const {
  return getFirstDecl();
}

static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == UnresolvedUsingTypename; }
3850};

3852/// Represents a C++11 static_assert declaration.
3853class StaticAssertDecl : public Decl {
llvm::PointerIntPair<Expr *, 1, bool> AssertExprAndFailed;
StringLiteral *Message;
SourceLocation RParenLoc;

StaticAssertDecl(DeclContext *DC, SourceLocation StaticAssertLoc,
                 Expr *AssertExpr, StringLiteral *Message,
                 SourceLocation RParenLoc, bool Failed)
    : Decl(StaticAssert, DC, StaticAssertLoc),
      AssertExprAndFailed(AssertExpr, Failed), Message(Message),
      RParenLoc(RParenLoc) {}

virtual void anchor();

3867public:
friend class ASTDeclReader;

static StaticAssertDecl *Create(ASTContext &C, DeclContext *DC,
                                SourceLocation StaticAssertLoc,
                                Expr *AssertExpr, StringLiteral *Message,
                                SourceLocation RParenLoc, bool Failed);
static StaticAssertDecl *CreateDeserialized(ASTContext &C, unsigned ID);

Expr *getAssertExpr() { return AssertExprAndFailed.getPointer(); }
const Expr *getAssertExpr() const { return AssertExprAndFailed.getPointer(); }

StringLiteral *getMessage() { return Message; }
const StringLiteral *getMessage() const { return Message; }

bool isFailed() const { return AssertExprAndFailed.getInt(); }

SourceLocation getRParenLoc() const { return RParenLoc; }

SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) {
  return SourceRange(getLocation(), getRParenLoc());
}

static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == StaticAssert; }
3892};

3894/// A binding in a decomposition declaration. For instance, given:
3895///
3896///   int n[3];
3897///   auto &[a, b, c] = n;
3898///
3899/// a, b, and c are BindingDecls, whose bindings are the expressions
3900/// x[0], x[1], and x[2] respectively, where x is the implicit
3901/// DecompositionDecl of type 'int (&)[3]'.
3902class BindingDecl : public ValueDecl {
/// The declaration that this binding binds to part of.
LazyDeclPtr Decomp;
/// The binding represented by this declaration. References to this
/// declaration are effectively equivalent to this expression (except
/// that it is only evaluated once at the point of declaration of the
/// binding).
Expr *Binding = nullptr;

BindingDecl(DeclContext *DC, SourceLocation IdLoc, IdentifierInfo *Id)
    : ValueDecl(Decl::Binding, DC, IdLoc, Id, QualType()) {}

void anchor() override;

3916public:
friend class ASTDeclReader;

static BindingDecl *Create(ASTContext &C, DeclContext *DC,
                           SourceLocation IdLoc, IdentifierInfo *Id);
static BindingDecl *CreateDeserialized(ASTContext &C, unsigned ID);

/// Get the expression to which this declaration is bound. This may be null
/// in two different cases: while parsing the initializer for the
/// decomposition declaration, and when the initializer is type-dependent.
Expr *getBinding() const { return Binding; }

/// Get the decomposition declaration that this binding represents a
/// decomposition of.
ValueDecl *getDecomposedDecl() const;

/// Get the variable (if any) that holds the value of evaluating the binding.
/// Only present for user-defined bindings for tuple-like types.
VarDecl *getHoldingVar() const;

/// Set the binding for this BindingDecl, along with its declared type (which
/// should be a possibly-cv-qualified form of the type of the binding, or a
/// reference to such a type).
void setBinding(QualType DeclaredType, Expr *Binding) {
  setType(DeclaredType);
  this->Binding = Binding;
}

/// Set the decomposed variable for this BindingDecl.
void setDecomposedDecl(ValueDecl *Decomposed) { Decomp = Decomposed; }

static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == Decl::Binding; }
3949};

3951/// A decomposition declaration. For instance, given:
3952///
3953///   int n[3];
3954///   auto &[a, b, c] = n;
3955///
3956/// the second line declares a DecompositionDecl of type 'int (&)[3]', and
3957/// three BindingDecls (named a, b, and c). An instance of this class is always
3958/// unnamed, but behaves in almost all other respects like a VarDecl.
3959class DecompositionDecl final
  : public VarDecl,
    private llvm::TrailingObjects<DecompositionDecl, BindingDecl *> {
/// The number of BindingDecl*s following this object.
unsigned NumBindings;

DecompositionDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
                  SourceLocation LSquareLoc, QualType T,
                  TypeSourceInfo *TInfo, StorageClass SC,
                  ArrayRef<BindingDecl *> Bindings)
    : VarDecl(Decomposition, C, DC, StartLoc, LSquareLoc, nullptr, T, TInfo,
              SC),
      NumBindings(Bindings.size()) {
  std::uninitialized_copy(Bindings.begin(), Bindings.end(),
                          getTrailingObjects<BindingDecl *>());
  for (auto *B : Bindings)
    B->setDecomposedDecl(this);
}

void anchor() override;

3980public:
friend class ASTDeclReader;
friend TrailingObjects;

static DecompositionDecl *Create(ASTContext &C, DeclContext *DC,
                                 SourceLocation StartLoc,
                                 SourceLocation LSquareLoc,
                                 QualType T, TypeSourceInfo *TInfo,
                                 StorageClass S,
                                 ArrayRef<BindingDecl *> Bindings);
static DecompositionDecl *CreateDeserialized(ASTContext &C, unsigned ID,
                                             unsigned NumBindings);

ArrayRef<BindingDecl *> bindings() const {
  return llvm::makeArrayRef(getTrailingObjects<BindingDecl *>(), NumBindings);
}

void printName(raw_ostream &os) const override;

static bool classof(const Decl *D) { return classofKind(D->getKind()); }
static bool classofKind(Kind K) { return K == Decomposition; }
4001};

4003/// An instance of this class represents the declaration of a property
4004/// member.  This is a Microsoft extension to C++, first introduced in
4005/// Visual Studio .NET 2003 as a parallel to similar features in C#
4006/// and Managed C++.
4007///
4008/// A property must always be a non-static class member.
4009///
4010/// A property member superficially resembles a non-static data
4011/// member, except preceded by a property attribute:
4012///   __declspec(property(get=GetX, put=PutX)) int x;
4013/// Either (but not both) of the 'get' and 'put' names may be omitted.
4014///
4015/// A reference to a property is always an lvalue.  If the lvalue
4016/// undergoes lvalue-to-rvalue conversion, then a getter name is
4017/// required, and that member is called with no arguments.
4018/// If the lvalue is assigned into, then a setter name is required,
4019/// and that member is called with one argument, the value assigned.
4020/// Both operations are potentially overloaded.  Compound assignments
4021/// are permitted, as are the increment and decrement operators.
4022///
4023/// The getter and putter methods are permitted to be overloaded,
4024/// although their return and parameter types are subject to certain
4025/// restrictions according to the type of the property.
4026///
4027/// A property declared using an incomplete array type may
4028/// additionally be subscripted, adding extra parameters to the getter
4029/// and putter methods.
4030class MSPropertyDecl : public DeclaratorDecl {
IdentifierInfo *GetterId, *SetterId;

MSPropertyDecl(DeclContext *DC, SourceLocation L, DeclarationName N,
               QualType T, TypeSourceInfo *TInfo, SourceLocation StartL,
               IdentifierInfo *Getter, IdentifierInfo *Setter)
    : DeclaratorDecl(MSProperty, DC, L, N, T, TInfo, StartL),
      GetterId(Getter), SetterId(Setter) {}

void anchor() override;
4040public:
friend class ASTDeclReader;

static MSPropertyDecl *Create(ASTContext &C, DeclContext *DC,
                              SourceLocation L, DeclarationName N, QualType T,
                              TypeSourceInfo *TInfo, SourceLocation StartL,
                              IdentifierInfo *Getter, IdentifierInfo *Setter);
static MSPropertyDecl *CreateDeserialized(ASTContext &C, unsigned ID);

static bool classof(const Decl *D) { return D->getKind() == MSProperty; }

bool hasGetter() const { return GetterId != nullptr; }
IdentifierInfo* getGetterId() const { return GetterId; }
bool hasSetter() const { return SetterId != nullptr; }
IdentifierInfo* getSetterId() const { return SetterId; }
4055};

4057/// Insertion operator for diagnostics.  This allows sending an AccessSpecifier
4058/// into a diagnostic with <<.
4059const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB,
                                  AccessSpecifier AS);

4062const PartialDiagnostic &operator<<(const PartialDiagnostic &DB,
                                  AccessSpecifier AS);

4065} // namespace clang

4067#endif // LLVM_CLANG_AST_DECLCXX_H