/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp

Bug Summary

File:	src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp
Warning:	line 6699, column 23 Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name TypeSystemClang.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model static -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/obj -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/llvm/include -I /usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../include -I /usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/obj -I /usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/obj/../include -D NDEBUG -D __STDC_LIMIT_MACROS -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D LLVM_PREFIX="/usr" -I /usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/include -I /usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source -I /usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/clang/include -internal-isystem /usr/include/c++/v1 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/obj -ferror-limit 19 -fvisibility-inlines-hidden -fwrapv -stack-protector 2 -fno-rtti -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c++ /usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp

/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp

→

1//===-- TypeSystemClang.cpp -----------------------------------------------===//
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//===----------------------------------------------------------------------===//

9#include "TypeSystemClang.h"

11#include "llvm/Support/FormatAdapters.h"
12#include "llvm/Support/FormatVariadic.h"

14#include <mutex>
15#include <string>
16#include <vector>

18#include "clang/AST/ASTContext.h"
19#include "clang/AST/ASTImporter.h"
20#include "clang/AST/Attr.h"
21#include "clang/AST/CXXInheritance.h"
22#include "clang/AST/DeclObjC.h"
23#include "clang/AST/DeclTemplate.h"
24#include "clang/AST/Mangle.h"
25#include "clang/AST/RecordLayout.h"
26#include "clang/AST/Type.h"
27#include "clang/AST/VTableBuilder.h"
28#include "clang/Basic/Builtins.h"
29#include "clang/Basic/Diagnostic.h"
30#include "clang/Basic/FileManager.h"
31#include "clang/Basic/FileSystemOptions.h"
32#include "clang/Basic/LangStandard.h"
33#include "clang/Basic/SourceManager.h"
34#include "clang/Basic/TargetInfo.h"
35#include "clang/Basic/TargetOptions.h"
36#include "clang/Frontend/FrontendOptions.h"
37#include "clang/Lex/HeaderSearch.h"
38#include "clang/Lex/HeaderSearchOptions.h"
39#include "clang/Lex/ModuleMap.h"
40#include "clang/Sema/Sema.h"

42#include "llvm/Support/Signals.h"
43#include "llvm/Support/Threading.h"

45#include "Plugins/ExpressionParser/Clang/ClangASTImporter.h"
46#include "Plugins/ExpressionParser/Clang/ClangASTMetadata.h"
47#include "Plugins/ExpressionParser/Clang/ClangExternalASTSourceCallbacks.h"
48#include "Plugins/ExpressionParser/Clang/ClangFunctionCaller.h"
49#include "Plugins/ExpressionParser/Clang/ClangPersistentVariables.h"
50#include "Plugins/ExpressionParser/Clang/ClangUserExpression.h"
51#include "Plugins/ExpressionParser/Clang/ClangUtil.h"
52#include "Plugins/ExpressionParser/Clang/ClangUtilityFunction.h"
53#include "lldb/Utility/ArchSpec.h"
54#include "lldb/Utility/Flags.h"

56#include "lldb/Core/DumpDataExtractor.h"
57#include "lldb/Core/Module.h"
58#include "lldb/Core/PluginManager.h"
59#include "lldb/Core/StreamFile.h"
60#include "lldb/Core/ThreadSafeDenseMap.h"
61#include "lldb/Core/UniqueCStringMap.h"
62#include "lldb/Symbol/ObjectFile.h"
63#include "lldb/Symbol/SymbolFile.h"
64#include "lldb/Target/ExecutionContext.h"
65#include "lldb/Target/Language.h"
66#include "lldb/Target/Process.h"
67#include "lldb/Target/Target.h"
68#include "lldb/Utility/DataExtractor.h"
69#include "lldb/Utility/LLDBAssert.h"
70#include "lldb/Utility/Log.h"
71#include "lldb/Utility/RegularExpression.h"
72#include "lldb/Utility/Scalar.h"

74#include "Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.h"
75#include "Plugins/SymbolFile/DWARF/DWARFASTParserClang.h"
76#include "Plugins/SymbolFile/PDB/PDBASTParser.h"

78#include <cstdio>

80#include <mutex>

82using namespace lldb;
83using namespace lldb_private;
84using namespace clang;
85using llvm::StringSwitch;

87LLDB_PLUGIN_DEFINE(TypeSystemClang)namespace lldb_private { void lldb_initialize_TypeSystemClang
() { TypeSystemClang::Initialize(); } void lldb_terminate_TypeSystemClang
() { TypeSystemClang::Terminate(); } }

89namespace {
90static void VerifyDecl(clang::Decl *decl) {
assert(decl && "VerifyDecl called with nullptr?")((void)0);
92#ifndef NDEBUG1
// We don't care about the actual access value here but only want to trigger
// that Clang calls its internal Decl::AccessDeclContextSanity check.
decl->getAccess();
96#endif
97}

99static inline bool
100TypeSystemClangSupportsLanguage(lldb::LanguageType language) {
return language == eLanguageTypeUnknown || // Clang is the default type system
       lldb_private::Language::LanguageIsC(language) ||
       lldb_private::Language::LanguageIsCPlusPlus(language) ||
       lldb_private::Language::LanguageIsObjC(language) ||
       lldb_private::Language::LanguageIsPascal(language) ||
       // Use Clang for Rust until there is a proper language plugin for it
       language == eLanguageTypeRust ||
       language == eLanguageTypeExtRenderScript ||
       // Use Clang for D until there is a proper language plugin for it
       language == eLanguageTypeD ||
       // Open Dylan compiler debug info is designed to be Clang-compatible
       language == eLanguageTypeDylan;
113}

115// Checks whether m1 is an overload of m2 (as opposed to an override). This is
116// called by addOverridesForMethod to distinguish overrides (which share a
117// vtable entry) from overloads (which require distinct entries).
118bool isOverload(clang::CXXMethodDecl *m1, clang::CXXMethodDecl *m2) {
// FIXME: This should detect covariant return types, but currently doesn't.
lldbassert(&m1->getASTContext() == &m2->getASTContext() &&lldb_private::lldb_assert(static_cast<bool>(&m1->
getASTContext() == &m2->getASTContext() && "Methods should have the same AST context"
), "&m1->getASTContext() == &m2->getASTContext() && \"Methods should have the same AST context\""
, __FUNCTION__, "/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp"
, 121)
           "Methods should have the same AST context")lldb_private::lldb_assert(static_cast<bool>(&m1->
getASTContext() == &m2->getASTContext() && "Methods should have the same AST context"
), "&m1->getASTContext() == &m2->getASTContext() && \"Methods should have the same AST context\""
, __FUNCTION__, "/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp"
, 121);
clang::ASTContext &context = m1->getASTContext();

const auto *m1Type = llvm::cast<clang::FunctionProtoType>(
    context.getCanonicalType(m1->getType()));

const auto *m2Type = llvm::cast<clang::FunctionProtoType>(
    context.getCanonicalType(m2->getType()));

auto compareArgTypes = [&context](const clang::QualType &m1p,
                                  const clang::QualType &m2p) {
  return context.hasSameType(m1p.getUnqualifiedType(),
                             m2p.getUnqualifiedType());
};

// FIXME: In C++14 and later, we can just pass m2Type->param_type_end()
//        as a fourth parameter to std::equal().
return (m1->getNumParams() != m2->getNumParams()) ||
       !std::equal(m1Type->param_type_begin(), m1Type->param_type_end(),
                   m2Type->param_type_begin(), compareArgTypes);
141}

143// If decl is a virtual method, walk the base classes looking for methods that
144// decl overrides. This table of overridden methods is used by IRGen to
145// determine the vtable layout for decl's parent class.
146void addOverridesForMethod(clang::CXXMethodDecl *decl) {
if (!decl->isVirtual())
  return;

clang::CXXBasePaths paths;
llvm::SmallVector<clang::NamedDecl *, 4> decls;

auto find_overridden_methods =
    [&decls, decl](const clang::CXXBaseSpecifier *specifier,
                   clang::CXXBasePath &path) {
      if (auto *base_record = llvm::dyn_cast<clang::CXXRecordDecl>(
              specifier->getType()->getAs<clang::RecordType>()->getDecl())) {

        clang::DeclarationName name = decl->getDeclName();

        // If this is a destructor, check whether the base class destructor is
        // virtual.
        if (name.getNameKind() == clang::DeclarationName::CXXDestructorName)
          if (auto *baseDtorDecl = base_record->getDestructor()) {
            if (baseDtorDecl->isVirtual()) {
              decls.push_back(baseDtorDecl);
              return true;
            } else
              return false;
          }

        // Otherwise, search for name in the base class.
        for (path.Decls = base_record->lookup(name).begin();
             path.Decls != path.Decls.end(); ++path.Decls) {
          if (auto *method_decl =
                  llvm::dyn_cast<clang::CXXMethodDecl>(*path.Decls))
            if (method_decl->isVirtual() && !isOverload(decl, method_decl)) {
              decls.push_back(method_decl);
              return true;
            }
        }
      }

      return false;
    };

if (decl->getParent()->lookupInBases(find_overridden_methods, paths)) {
  for (auto *overridden_decl : decls)
    decl->addOverriddenMethod(
        llvm::cast<clang::CXXMethodDecl>(overridden_decl));
}
192}
193}

195static lldb::addr_t GetVTableAddress(Process &process,
                                   VTableContextBase &vtable_ctx,
                                   ValueObject &valobj,
                                   const ASTRecordLayout &record_layout) {
// Retrieve type info
CompilerType pointee_type;
CompilerType this_type(valobj.GetCompilerType());
uint32_t type_info = this_type.GetTypeInfo(&pointee_type);
if (!type_info)
  return LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

// Check if it's a pointer or reference
bool ptr_or_ref = false;
if (type_info & (eTypeIsPointer | eTypeIsReference)) {
  ptr_or_ref = true;
  type_info = pointee_type.GetTypeInfo();
}

// We process only C++ classes
const uint32_t cpp_class = eTypeIsClass | eTypeIsCPlusPlus;
if ((type_info & cpp_class) != cpp_class)
  return LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

// Calculate offset to VTable pointer
lldb::offset_t vbtable_ptr_offset =
    vtable_ctx.isMicrosoft() ? record_layout.getVBPtrOffset().getQuantity()
                             : 0;

if (ptr_or_ref) {
  // We have a pointer / ref to object, so read
  // VTable pointer from process memory

  if (valobj.GetAddressTypeOfChildren() != eAddressTypeLoad)
    return LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

  auto vbtable_ptr_addr = valobj.GetValueAsUnsigned(LLDB_INVALID_ADDRESS0xffffffffffffffffULL);
  if (vbtable_ptr_addr == LLDB_INVALID_ADDRESS0xffffffffffffffffULL)
    return LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

  vbtable_ptr_addr += vbtable_ptr_offset;

  Status err;
  return process.ReadPointerFromMemory(vbtable_ptr_addr, err);
}

// We have an object already read from process memory,
// so just extract VTable pointer from it

DataExtractor data;
Status err;
auto size = valobj.GetData(data, err);
if (err.Fail() || vbtable_ptr_offset + data.GetAddressByteSize() > size)
  return LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

return data.GetAddress(&vbtable_ptr_offset);
250}

252static int64_t ReadVBaseOffsetFromVTable(Process &process,
                                       VTableContextBase &vtable_ctx,
                                       lldb::addr_t vtable_ptr,
                                       const CXXRecordDecl *cxx_record_decl,
                                       const CXXRecordDecl *base_class_decl) {
if (vtable_ctx.isMicrosoft()) {
  clang::MicrosoftVTableContext &msoft_vtable_ctx =
      static_cast<clang::MicrosoftVTableContext &>(vtable_ctx);

  // Get the index into the virtual base table. The
  // index is the index in uint32_t from vbtable_ptr
  const unsigned vbtable_index =
      msoft_vtable_ctx.getVBTableIndex(cxx_record_decl, base_class_decl);
  const lldb::addr_t base_offset_addr = vtable_ptr + vbtable_index * 4;
  Status err;
  return process.ReadSignedIntegerFromMemory(base_offset_addr, 4, INT64_MAX0x7fffffffffffffffLL,
                                             err);
}

clang::ItaniumVTableContext &itanium_vtable_ctx =
    static_cast<clang::ItaniumVTableContext &>(vtable_ctx);

clang::CharUnits base_offset_offset =
    itanium_vtable_ctx.getVirtualBaseOffsetOffset(cxx_record_decl,
                                                  base_class_decl);
const lldb::addr_t base_offset_addr =
    vtable_ptr + base_offset_offset.getQuantity();
const uint32_t base_offset_size = process.GetAddressByteSize();
Status err;
return process.ReadSignedIntegerFromMemory(base_offset_addr, base_offset_size,
                                           INT64_MAX0x7fffffffffffffffLL, err);
283}

285static bool GetVBaseBitOffset(VTableContextBase &vtable_ctx,
                            ValueObject &valobj,
                            const ASTRecordLayout &record_layout,
                            const CXXRecordDecl *cxx_record_decl,
                            const CXXRecordDecl *base_class_decl,
                            int32_t &bit_offset) {
ExecutionContext exe_ctx(valobj.GetExecutionContextRef());
Process *process = exe_ctx.GetProcessPtr();
if (!process)
  return false;

lldb::addr_t vtable_ptr =
    GetVTableAddress(*process, vtable_ctx, valobj, record_layout);
if (vtable_ptr == LLDB_INVALID_ADDRESS0xffffffffffffffffULL)
  return false;

auto base_offset = ReadVBaseOffsetFromVTable(
    *process, vtable_ctx, vtable_ptr, cxx_record_decl, base_class_decl);
if (base_offset == INT64_MAX0x7fffffffffffffffLL)
  return false;

bit_offset = base_offset * 8;

return true;
309}

311typedef lldb_private::ThreadSafeDenseMap<clang::ASTContext *, TypeSystemClang *>
  ClangASTMap;

314static ClangASTMap &GetASTMap() {
static ClangASTMap *g_map_ptr = nullptr;
static llvm::once_flag g_once_flag;
llvm::call_once(g_once_flag, []() {
  g_map_ptr = new ClangASTMap(); // leaked on purpose to avoid spins
});
return *g_map_ptr;
321}

323TypePayloadClang::TypePayloadClang(OptionalClangModuleID owning_module,
                                 bool is_complete_objc_class)
  : m_payload(owning_module.GetValue()) {
SetIsCompleteObjCClass(is_complete_objc_class);
327}

329void TypePayloadClang::SetOwningModule(OptionalClangModuleID id) {
assert(id.GetValue() < ObjCClassBit)((void)0);
bool is_complete = IsCompleteObjCClass();
m_payload = id.GetValue();
SetIsCompleteObjCClass(is_complete);
334}

336static void SetMemberOwningModule(clang::Decl *member,
                                const clang::Decl *parent) {
if (!member || !parent)
  return;

OptionalClangModuleID id(parent->getOwningModuleID());
if (!id.HasValue())
  return;

member->setFromASTFile();
member->setOwningModuleID(id.GetValue());
member->setModuleOwnershipKind(clang::Decl::ModuleOwnershipKind::Visible);
if (llvm::isa<clang::NamedDecl>(member))
  if (auto *dc = llvm::dyn_cast<clang::DeclContext>(parent)) {
    dc->setHasExternalVisibleStorage(true);
    // This triggers ExternalASTSource::FindExternalVisibleDeclsByName() to be
    // called when searching for members.
    dc->setHasExternalLexicalStorage(true);
  }
355}

357char TypeSystemClang::ID;

359bool TypeSystemClang::IsOperator(llvm::StringRef name,
                               clang::OverloadedOperatorKind &op_kind) {
// All operators have to start with "operator".
if (!name.consume_front("operator"))
  return false;

// Remember if there was a space after "operator". This is necessary to
// check for collisions with strangely named functions like "operatorint()".
bool space_after_operator = name.consume_front(" ");

op_kind = StringSwitch<clang::OverloadedOperatorKind>(name)
              .Case("+", clang::OO_Plus)
              .Case("+=", clang::OO_PlusEqual)
              .Case("++", clang::OO_PlusPlus)
              .Case("-", clang::OO_Minus)
              .Case("-=", clang::OO_MinusEqual)
              .Case("--", clang::OO_MinusMinus)
              .Case("->", clang::OO_Arrow)
              .Case("->*", clang::OO_ArrowStar)
              .Case("*", clang::OO_Star)
              .Case("*=", clang::OO_StarEqual)
              .Case("/", clang::OO_Slash)
              .Case("/=", clang::OO_SlashEqual)
              .Case("%", clang::OO_Percent)
              .Case("%=", clang::OO_PercentEqual)
              .Case("^", clang::OO_Caret)
              .Case("^=", clang::OO_CaretEqual)
              .Case("&", clang::OO_Amp)
              .Case("&=", clang::OO_AmpEqual)
              .Case("&&", clang::OO_AmpAmp)
              .Case("|", clang::OO_Pipe)
              .Case("|=", clang::OO_PipeEqual)
              .Case("||", clang::OO_PipePipe)
              .Case("~", clang::OO_Tilde)
              .Case("!", clang::OO_Exclaim)
              .Case("!=", clang::OO_ExclaimEqual)
              .Case("=", clang::OO_Equal)
              .Case("==", clang::OO_EqualEqual)
              .Case("<", clang::OO_Less)
              .Case("<<", clang::OO_LessLess)
              .Case("<<=", clang::OO_LessLessEqual)
              .Case("<=", clang::OO_LessEqual)
              .Case(">", clang::OO_Greater)
              .Case(">>", clang::OO_GreaterGreater)
              .Case(">>=", clang::OO_GreaterGreaterEqual)
              .Case(">=", clang::OO_GreaterEqual)
              .Case("()", clang::OO_Call)
              .Case("[]", clang::OO_Subscript)
              .Case(",", clang::OO_Comma)
              .Default(clang::NUM_OVERLOADED_OPERATORS);

// We found a fitting operator, so we can exit now.
if (op_kind != clang::NUM_OVERLOADED_OPERATORS)
  return true;

// After the "operator " or "operator" part is something unknown. This means
// it's either one of the named operators (new/delete), a conversion operator
// (e.g. operator bool) or a function which name starts with "operator"
// (e.g. void operatorbool).

// If it's a function that starts with operator it can't have a space after
// "operator" because identifiers can't contain spaces.
// E.g. "operator int" (conversion operator)
//  vs. "operatorint" (function with colliding name).
if (!space_after_operator)
  return false; // not an operator.

// Now the operator is either one of the named operators or a conversion
// operator.
op_kind = StringSwitch<clang::OverloadedOperatorKind>(name)
              .Case("new", clang::OO_New)
              .Case("new[]", clang::OO_Array_New)
              .Case("delete", clang::OO_Delete)
              .Case("delete[]", clang::OO_Array_Delete)
              // conversion operators hit this case.
              .Default(clang::NUM_OVERLOADED_OPERATORS);

return true;
437}

439clang::AccessSpecifier
440TypeSystemClang::ConvertAccessTypeToAccessSpecifier(AccessType access) {
switch (access) {
default:
  break;
case eAccessNone:
  return AS_none;
case eAccessPublic:
  return AS_public;
case eAccessPrivate:
  return AS_private;
case eAccessProtected:
  return AS_protected;
}
return AS_none;
454}

456static void ParseLangArgs(LangOptions &Opts, InputKind IK, const char *triple) {
// FIXME: Cleanup per-file based stuff.

// Set some properties which depend solely on the input kind; it would be
// nice to move these to the language standard, and have the driver resolve
// the input kind + language standard.
if (IK.getLanguage() == clang::Language::Asm) {
  Opts.AsmPreprocessor = 1;
} else if (IK.isObjectiveC()) {
  Opts.ObjC = 1;
}

LangStandard::Kind LangStd = LangStandard::lang_unspecified;

if (LangStd == LangStandard::lang_unspecified) {
  // Based on the base language, pick one.
  switch (IK.getLanguage()) {
  case clang::Language::Unknown:
  case clang::Language::LLVM_IR:
  case clang::Language::RenderScript:
    llvm_unreachable("Invalid input kind!")__builtin_unreachable();
  case clang::Language::OpenCL:
    LangStd = LangStandard::lang_opencl10;
    break;
  case clang::Language::OpenCLCXX:
    LangStd = LangStandard::lang_openclcpp;
    break;
  case clang::Language::CUDA:
    LangStd = LangStandard::lang_cuda;
    break;
  case clang::Language::Asm:
  case clang::Language::C:
  case clang::Language::ObjC:
    LangStd = LangStandard::lang_gnu99;
    break;
  case clang::Language::CXX:
  case clang::Language::ObjCXX:
    LangStd = LangStandard::lang_gnucxx98;
    break;
  case clang::Language::HIP:
    LangStd = LangStandard::lang_hip;
    break;
  }
}

const LangStandard &Std = LangStandard::getLangStandardForKind(LangStd);
Opts.LineComment = Std.hasLineComments();
Opts.C99 = Std.isC99();
Opts.CPlusPlus = Std.isCPlusPlus();
Opts.CPlusPlus11 = Std.isCPlusPlus11();
Opts.Digraphs = Std.hasDigraphs();
Opts.GNUMode = Std.isGNUMode();
Opts.GNUInline = !Std.isC99();
Opts.HexFloats = Std.hasHexFloats();
Opts.ImplicitInt = Std.hasImplicitInt();

Opts.WChar = true;

// OpenCL has some additional defaults.
if (LangStd == LangStandard::lang_opencl10) {
  Opts.OpenCL = 1;
  Opts.AltiVec = 1;
  Opts.CXXOperatorNames = 1;
  Opts.setLaxVectorConversions(LangOptions::LaxVectorConversionKind::All);
}

// OpenCL and C++ both have bool, true, false keywords.
Opts.Bool = Opts.OpenCL || Opts.CPlusPlus;

Opts.setValueVisibilityMode(DefaultVisibility);

// Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs is
// specified, or -std is set to a conforming mode.
Opts.Trigraphs = !Opts.GNUMode;
Opts.CharIsSigned = ArchSpec(triple).CharIsSignedByDefault();
Opts.OptimizeSize = 0;

// FIXME: Eliminate this dependency.
//    unsigned Opt =
//    Args.hasArg(OPT_Os) ? 2 : getLastArgIntValue(Args, OPT_O, 0, Diags);
//    Opts.Optimize = Opt != 0;
unsigned Opt = 0;

// This is the __NO_INLINE__ define, which just depends on things like the
// optimization level and -fno-inline, not actually whether the backend has
// inlining enabled.
//
// FIXME: This is affected by other options (-fno-inline).
Opts.NoInlineDefine = !Opt;

// This is needed to allocate the extra space for the owning module
// on each decl.
Opts.ModulesLocalVisibility = 1;
549}

551TypeSystemClang::TypeSystemClang(llvm::StringRef name,
                               llvm::Triple target_triple) {
m_display_name = name.str();
if (!target_triple.str().empty())
  SetTargetTriple(target_triple.str());
// The caller didn't pass an ASTContext so create a new one for this
// TypeSystemClang.
CreateASTContext();
559}

561TypeSystemClang::TypeSystemClang(llvm::StringRef name,
                               ASTContext &existing_ctxt) {
m_display_name = name.str();
SetTargetTriple(existing_ctxt.getTargetInfo().getTriple().str());

m_ast_up.reset(&existing_ctxt);
GetASTMap().Insert(&existing_ctxt, this);
568}

570// Destructor
571TypeSystemClang::~TypeSystemClang() { Finalize(); }

573ConstString TypeSystemClang::GetPluginNameStatic() {
return ConstString("clang");
575}

577ConstString TypeSystemClang::GetPluginName() {
return TypeSystemClang::GetPluginNameStatic();
579}

581uint32_t TypeSystemClang::GetPluginVersion() { return 1; }

583lldb::TypeSystemSP TypeSystemClang::CreateInstance(lldb::LanguageType language,
                                                 lldb_private::Module *module,
                                                 Target *target) {
if (!TypeSystemClangSupportsLanguage(language))
  return lldb::TypeSystemSP();
ArchSpec arch;
if (module)
  arch = module->GetArchitecture();
else if (target)
  arch = target->GetArchitecture();

if (!arch.IsValid())
  return lldb::TypeSystemSP();

llvm::Triple triple = arch.GetTriple();
// LLVM wants this to be set to iOS or MacOSX; if we're working on
// a bare-boards type image, change the triple for llvm's benefit.
if (triple.getVendor() == llvm::Triple::Apple &&
    triple.getOS() == llvm::Triple::UnknownOS) {
  if (triple.getArch() == llvm::Triple::arm ||
      triple.getArch() == llvm::Triple::aarch64 ||
      triple.getArch() == llvm::Triple::aarch64_32 ||
      triple.getArch() == llvm::Triple::thumb) {
    triple.setOS(llvm::Triple::IOS);
  } else {
    triple.setOS(llvm::Triple::MacOSX);
  }
}

if (module) {
  std::string ast_name =
      "ASTContext for '" + module->GetFileSpec().GetPath() + "'";
  return std::make_shared<TypeSystemClang>(ast_name, triple);
} else if (target && target->IsValid())
  return std::make_shared<ScratchTypeSystemClang>(*target, triple);
return lldb::TypeSystemSP();
619}

621LanguageSet TypeSystemClang::GetSupportedLanguagesForTypes() {
LanguageSet languages;
languages.Insert(lldb::eLanguageTypeC89);
languages.Insert(lldb::eLanguageTypeC);
languages.Insert(lldb::eLanguageTypeC11);
languages.Insert(lldb::eLanguageTypeC_plus_plus);
languages.Insert(lldb::eLanguageTypeC99);
languages.Insert(lldb::eLanguageTypeObjC);
languages.Insert(lldb::eLanguageTypeObjC_plus_plus);
languages.Insert(lldb::eLanguageTypeC_plus_plus_03);
languages.Insert(lldb::eLanguageTypeC_plus_plus_11);
languages.Insert(lldb::eLanguageTypeC11);
languages.Insert(lldb::eLanguageTypeC_plus_plus_14);
return languages;
635}

637LanguageSet TypeSystemClang::GetSupportedLanguagesForExpressions() {
LanguageSet languages;
languages.Insert(lldb::eLanguageTypeC_plus_plus);
languages.Insert(lldb::eLanguageTypeObjC_plus_plus);
languages.Insert(lldb::eLanguageTypeC_plus_plus_03);
languages.Insert(lldb::eLanguageTypeC_plus_plus_11);
languages.Insert(lldb::eLanguageTypeC_plus_plus_14);
return languages;
645}

647void TypeSystemClang::Initialize() {
PluginManager::RegisterPlugin(
    GetPluginNameStatic(), "clang base AST context plug-in", CreateInstance,
    GetSupportedLanguagesForTypes(), GetSupportedLanguagesForExpressions());
651}

653void TypeSystemClang::Terminate() {
PluginManager::UnregisterPlugin(CreateInstance);
655}

657void TypeSystemClang::Finalize() {
assert(m_ast_up)((void)0);
GetASTMap().Erase(m_ast_up.get());
if (!m_ast_owned)
  m_ast_up.release();

m_builtins_up.reset();
m_selector_table_up.reset();
m_identifier_table_up.reset();
m_target_info_up.reset();
m_target_options_rp.reset();
m_diagnostics_engine_up.reset();
m_source_manager_up.reset();
m_language_options_up.reset();
671}

673void TypeSystemClang::setSema(Sema *s) {
// Ensure that the new sema actually belongs to our ASTContext.
assert(s == nullptr || &s->getASTContext() == m_ast_up.get())((void)0);
m_sema = s;
677}

679const char *TypeSystemClang::GetTargetTriple() {
return m_target_triple.c_str();
681}

683void TypeSystemClang::SetTargetTriple(llvm::StringRef target_triple) {
m_target_triple = target_triple.str();
685}

687void TypeSystemClang::SetExternalSource(
  llvm::IntrusiveRefCntPtr<ExternalASTSource> &ast_source_up) {
ASTContext &ast = getASTContext();
ast.getTranslationUnitDecl()->setHasExternalLexicalStorage(true);
ast.setExternalSource(ast_source_up);
692}

694ASTContext &TypeSystemClang::getASTContext() {
assert(m_ast_up)((void)0);
return *m_ast_up;
697}

699class NullDiagnosticConsumer : public DiagnosticConsumer {
700public:
NullDiagnosticConsumer() {
  m_log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS(1u << 8));
}

void HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
                      const clang::Diagnostic &info) override {
  if (m_log) {
    llvm::SmallVector<char, 32> diag_str(10);
    info.FormatDiagnostic(diag_str);
    diag_str.push_back('\0');
    LLDB_LOGF(m_log, "Compiler diagnostic: %s\n", diag_str.data())do { ::lldb_private::Log *log_private = (m_log); if (log_private
) log_private->Printf("Compiler diagnostic: %s\n", diag_str
.data()); } while (0);
  }
}

DiagnosticConsumer *clone(DiagnosticsEngine &Diags) const {
  return new NullDiagnosticConsumer();
}

719private:
Log *m_log;
721};

723void TypeSystemClang::CreateASTContext() {
assert(!m_ast_up)((void)0);
m_ast_owned = true;

m_language_options_up = std::make_unique<LangOptions>();
ParseLangArgs(*m_language_options_up, clang::Language::ObjCXX,
              GetTargetTriple());

m_identifier_table_up =
    std::make_unique<IdentifierTable>(*m_language_options_up, nullptr);
m_builtins_up = std::make_unique<Builtin::Context>();

m_selector_table_up = std::make_unique<SelectorTable>();

clang::FileSystemOptions file_system_options;
m_file_manager_up = std::make_unique<clang::FileManager>(
    file_system_options, FileSystem::Instance().GetVirtualFileSystem());

llvm::IntrusiveRefCntPtr<DiagnosticIDs> diag_id_sp(new DiagnosticIDs());
m_diagnostics_engine_up =
    std::make_unique<DiagnosticsEngine>(diag_id_sp, new DiagnosticOptions());

m_source_manager_up = std::make_unique<clang::SourceManager>(
    *m_diagnostics_engine_up, *m_file_manager_up);
m_ast_up = std::make_unique<ASTContext>(
    *m_language_options_up, *m_source_manager_up, *m_identifier_table_up,
    *m_selector_table_up, *m_builtins_up, TU_Complete);

m_diagnostic_consumer_up = std::make_unique<NullDiagnosticConsumer>();
m_ast_up->getDiagnostics().setClient(m_diagnostic_consumer_up.get(), false);

// This can be NULL if we don't know anything about the architecture or if
// the target for an architecture isn't enabled in the llvm/clang that we
// built
TargetInfo *target_info = getTargetInfo();
if (target_info)
  m_ast_up->InitBuiltinTypes(*target_info);

GetASTMap().Insert(m_ast_up.get(), this);

llvm::IntrusiveRefCntPtr<clang::ExternalASTSource> ast_source_up(
    new ClangExternalASTSourceCallbacks(*this));
SetExternalSource(ast_source_up);
766}

768TypeSystemClang *TypeSystemClang::GetASTContext(clang::ASTContext *ast) {
TypeSystemClang *clang_ast = GetASTMap().Lookup(ast);
return clang_ast;
771}

773clang::MangleContext *TypeSystemClang::getMangleContext() {
if (m_mangle_ctx_up == nullptr)
  m_mangle_ctx_up.reset(getASTContext().createMangleContext());
return m_mangle_ctx_up.get();
777}

779std::shared_ptr<clang::TargetOptions> &TypeSystemClang::getTargetOptions() {
if (m_target_options_rp == nullptr && !m_target_triple.empty()) {
  m_target_options_rp = std::make_shared<clang::TargetOptions>();
  if (m_target_options_rp != nullptr)
    m_target_options_rp->Triple = m_target_triple;
}
return m_target_options_rp;
786}

788TargetInfo *TypeSystemClang::getTargetInfo() {
// target_triple should be something like "x86_64-apple-macosx"
if (m_target_info_up == nullptr && !m_target_triple.empty())
  m_target_info_up.reset(TargetInfo::CreateTargetInfo(
      getASTContext().getDiagnostics(), getTargetOptions()));
return m_target_info_up.get();
794}

796#pragma mark Basic Types

798static inline bool QualTypeMatchesBitSize(const uint64_t bit_size,
                                        ASTContext &ast, QualType qual_type) {
uint64_t qual_type_bit_size = ast.getTypeSize(qual_type);
return qual_type_bit_size == bit_size;
802}

804CompilerType
805TypeSystemClang::GetBuiltinTypeForEncodingAndBitSize(Encoding encoding,
                                                   size_t bit_size) {
ASTContext &ast = getASTContext();
switch (encoding) {
case eEncodingInvalid:
  if (QualTypeMatchesBitSize(bit_size, ast, ast.VoidPtrTy))
    return GetType(ast.VoidPtrTy);
  break;

case eEncodingUint:
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedCharTy))
    return GetType(ast.UnsignedCharTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedShortTy))
    return GetType(ast.UnsignedShortTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedIntTy))
    return GetType(ast.UnsignedIntTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedLongTy))
    return GetType(ast.UnsignedLongTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedLongLongTy))
    return GetType(ast.UnsignedLongLongTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedInt128Ty))
    return GetType(ast.UnsignedInt128Ty);
  break;

case eEncodingSint:
  if (QualTypeMatchesBitSize(bit_size, ast, ast.SignedCharTy))
    return GetType(ast.SignedCharTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.ShortTy))
    return GetType(ast.ShortTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.IntTy))
    return GetType(ast.IntTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.LongTy))
    return GetType(ast.LongTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.LongLongTy))
    return GetType(ast.LongLongTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.Int128Ty))
    return GetType(ast.Int128Ty);
  break;

case eEncodingIEEE754:
  if (QualTypeMatchesBitSize(bit_size, ast, ast.FloatTy))
    return GetType(ast.FloatTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.DoubleTy))
    return GetType(ast.DoubleTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.LongDoubleTy))
    return GetType(ast.LongDoubleTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.HalfTy))
    return GetType(ast.HalfTy);
  break;

case eEncodingVector:
  // Sanity check that bit_size is a multiple of 8's.
  if (bit_size && !(bit_size & 0x7u))
    return GetType(ast.getExtVectorType(ast.UnsignedCharTy, bit_size / 8));
  break;
}

return CompilerType();
863}

865lldb::BasicType
866TypeSystemClang::GetBasicTypeEnumeration(ConstString name) {
if (name) {
  typedef UniqueCStringMap<lldb::BasicType> TypeNameToBasicTypeMap;
  static TypeNameToBasicTypeMap g_type_map;
  static llvm::once_flag g_once_flag;
  llvm::call_once(g_once_flag, []() {
    // "void"
    g_type_map.Append(ConstString("void"), eBasicTypeVoid);

    // "char"
    g_type_map.Append(ConstString("char"), eBasicTypeChar);
    g_type_map.Append(ConstString("signed char"), eBasicTypeSignedChar);
    g_type_map.Append(ConstString("unsigned char"), eBasicTypeUnsignedChar);
    g_type_map.Append(ConstString("wchar_t"), eBasicTypeWChar);
    g_type_map.Append(ConstString("signed wchar_t"), eBasicTypeSignedWChar);
    g_type_map.Append(ConstString("unsigned wchar_t"),
                      eBasicTypeUnsignedWChar);
    // "short"
    g_type_map.Append(ConstString("short"), eBasicTypeShort);
    g_type_map.Append(ConstString("short int"), eBasicTypeShort);
    g_type_map.Append(ConstString("unsigned short"), eBasicTypeUnsignedShort);
    g_type_map.Append(ConstString("unsigned short int"),
                      eBasicTypeUnsignedShort);

    // "int"
    g_type_map.Append(ConstString("int"), eBasicTypeInt);
    g_type_map.Append(ConstString("signed int"), eBasicTypeInt);
    g_type_map.Append(ConstString("unsigned int"), eBasicTypeUnsignedInt);
    g_type_map.Append(ConstString("unsigned"), eBasicTypeUnsignedInt);

    // "long"
    g_type_map.Append(ConstString("long"), eBasicTypeLong);
    g_type_map.Append(ConstString("long int"), eBasicTypeLong);
    g_type_map.Append(ConstString("unsigned long"), eBasicTypeUnsignedLong);
    g_type_map.Append(ConstString("unsigned long int"),
                      eBasicTypeUnsignedLong);

    // "long long"
    g_type_map.Append(ConstString("long long"), eBasicTypeLongLong);
    g_type_map.Append(ConstString("long long int"), eBasicTypeLongLong);
    g_type_map.Append(ConstString("unsigned long long"),
                      eBasicTypeUnsignedLongLong);
    g_type_map.Append(ConstString("unsigned long long int"),
                      eBasicTypeUnsignedLongLong);

    // "int128"
    g_type_map.Append(ConstString("__int128_t"), eBasicTypeInt128);
    g_type_map.Append(ConstString("__uint128_t"), eBasicTypeUnsignedInt128);

    // Miscellaneous
    g_type_map.Append(ConstString("bool"), eBasicTypeBool);
    g_type_map.Append(ConstString("float"), eBasicTypeFloat);
    g_type_map.Append(ConstString("double"), eBasicTypeDouble);
    g_type_map.Append(ConstString("long double"), eBasicTypeLongDouble);
    g_type_map.Append(ConstString("id"), eBasicTypeObjCID);
    g_type_map.Append(ConstString("SEL"), eBasicTypeObjCSel);
    g_type_map.Append(ConstString("nullptr"), eBasicTypeNullPtr);
    g_type_map.Sort();
  });

  return g_type_map.Find(name, eBasicTypeInvalid);
}
return eBasicTypeInvalid;
929}

931uint32_t TypeSystemClang::GetPointerByteSize() {
if (m_pointer_byte_size == 0)
  if (auto size = GetBasicType(lldb::eBasicTypeVoid)
                      .GetPointerType()
                      .GetByteSize(nullptr))
    m_pointer_byte_size = *size;
return m_pointer_byte_size;
938}

940CompilerType TypeSystemClang::GetBasicType(lldb::BasicType basic_type) {
clang::ASTContext &ast = getASTContext();

lldb::opaque_compiler_type_t clang_type =
    GetOpaqueCompilerType(&ast, basic_type);

if (clang_type)
  return CompilerType(this, clang_type);
return CompilerType();
949}

951CompilerType TypeSystemClang::GetBuiltinTypeForDWARFEncodingAndBitSize(
  llvm::StringRef type_name, uint32_t dw_ate, uint32_t bit_size) {
ASTContext &ast = getASTContext();

switch (dw_ate) {
default:
  break;

case DW_ATE_address:
  if (QualTypeMatchesBitSize(bit_size, ast, ast.VoidPtrTy))
    return GetType(ast.VoidPtrTy);
  break;

case DW_ATE_boolean:
  if (QualTypeMatchesBitSize(bit_size, ast, ast.BoolTy))
    return GetType(ast.BoolTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedCharTy))
    return GetType(ast.UnsignedCharTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedShortTy))
    return GetType(ast.UnsignedShortTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedIntTy))
    return GetType(ast.UnsignedIntTy);
  break;

case DW_ATE_lo_user:
  // This has been seen to mean DW_AT_complex_integer
  if (type_name.contains("complex")) {
    CompilerType complex_int_clang_type =
        GetBuiltinTypeForDWARFEncodingAndBitSize("int", DW_ATE_signed,
                                                 bit_size / 2);
    return GetType(
        ast.getComplexType(ClangUtil::GetQualType(complex_int_clang_type)));
  }
  break;

case DW_ATE_complex_float:
  if (QualTypeMatchesBitSize(bit_size, ast, ast.FloatComplexTy))
    return GetType(ast.FloatComplexTy);
  else if (QualTypeMatchesBitSize(bit_size, ast, ast.DoubleComplexTy))
    return GetType(ast.DoubleComplexTy);
  else if (QualTypeMatchesBitSize(bit_size, ast, ast.LongDoubleComplexTy))
    return GetType(ast.LongDoubleComplexTy);
  else {
    CompilerType complex_float_clang_type =
        GetBuiltinTypeForDWARFEncodingAndBitSize("float", DW_ATE_float,
                                                 bit_size / 2);
    return GetType(
        ast.getComplexType(ClangUtil::GetQualType(complex_float_clang_type)));
  }
  break;

case DW_ATE_float:
  if (type_name == "float" &&
      QualTypeMatchesBitSize(bit_size, ast, ast.FloatTy))
    return GetType(ast.FloatTy);
  if (type_name == "double" &&
      QualTypeMatchesBitSize(bit_size, ast, ast.DoubleTy))
    return GetType(ast.DoubleTy);
  if (type_name == "long double" &&
      QualTypeMatchesBitSize(bit_size, ast, ast.LongDoubleTy))
    return GetType(ast.LongDoubleTy);
  // Fall back to not requiring a name match
  if (QualTypeMatchesBitSize(bit_size, ast, ast.FloatTy))
    return GetType(ast.FloatTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.DoubleTy))
    return GetType(ast.DoubleTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.LongDoubleTy))
    return GetType(ast.LongDoubleTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.HalfTy))
    return GetType(ast.HalfTy);
  break;

case DW_ATE_signed:
  if (!type_name.empty()) {
    if (type_name == "wchar_t" &&
        QualTypeMatchesBitSize(bit_size, ast, ast.WCharTy) &&
        (getTargetInfo() &&
         TargetInfo::isTypeSigned(getTargetInfo()->getWCharType())))
      return GetType(ast.WCharTy);
    if (type_name == "void" &&
        QualTypeMatchesBitSize(bit_size, ast, ast.VoidTy))
      return GetType(ast.VoidTy);
    if (type_name.contains("long long") &&
        QualTypeMatchesBitSize(bit_size, ast, ast.LongLongTy))
      return GetType(ast.LongLongTy);
    if (type_name.contains("long") &&
        QualTypeMatchesBitSize(bit_size, ast, ast.LongTy))
      return GetType(ast.LongTy);
    if (type_name.contains("short") &&
        QualTypeMatchesBitSize(bit_size, ast, ast.ShortTy))
      return GetType(ast.ShortTy);
    if (type_name.contains("char")) {
      if (QualTypeMatchesBitSize(bit_size, ast, ast.CharTy))
        return GetType(ast.CharTy);
      if (QualTypeMatchesBitSize(bit_size, ast, ast.SignedCharTy))
        return GetType(ast.SignedCharTy);
    }
    if (type_name.contains("int")) {
      if (QualTypeMatchesBitSize(bit_size, ast, ast.IntTy))
        return GetType(ast.IntTy);
      if (QualTypeMatchesBitSize(bit_size, ast, ast.Int128Ty))
        return GetType(ast.Int128Ty);
    }
  }
  // We weren't able to match up a type name, just search by size
  if (QualTypeMatchesBitSize(bit_size, ast, ast.CharTy))
    return GetType(ast.CharTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.ShortTy))
    return GetType(ast.ShortTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.IntTy))
    return GetType(ast.IntTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.LongTy))
    return GetType(ast.LongTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.LongLongTy))
    return GetType(ast.LongLongTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.Int128Ty))
    return GetType(ast.Int128Ty);
  break;

case DW_ATE_signed_char:
  if (ast.getLangOpts().CharIsSigned && type_name == "char") {
    if (QualTypeMatchesBitSize(bit_size, ast, ast.CharTy))
      return GetType(ast.CharTy);
  }
  if (QualTypeMatchesBitSize(bit_size, ast, ast.SignedCharTy))
    return GetType(ast.SignedCharTy);
  break;

case DW_ATE_unsigned:
  if (!type_name.empty()) {
    if (type_name == "wchar_t") {
      if (QualTypeMatchesBitSize(bit_size, ast, ast.WCharTy)) {
        if (!(getTargetInfo() &&
              TargetInfo::isTypeSigned(getTargetInfo()->getWCharType())))
          return GetType(ast.WCharTy);
      }
    }
    if (type_name.contains("long long")) {
      if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedLongLongTy))
        return GetType(ast.UnsignedLongLongTy);
    } else if (type_name.contains("long")) {
      if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedLongTy))
        return GetType(ast.UnsignedLongTy);
    } else if (type_name.contains("short")) {
      if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedShortTy))
        return GetType(ast.UnsignedShortTy);
    } else if (type_name.contains("char")) {
      if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedCharTy))
        return GetType(ast.UnsignedCharTy);
    } else if (type_name.contains("int")) {
      if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedIntTy))
        return GetType(ast.UnsignedIntTy);
      if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedInt128Ty))
        return GetType(ast.UnsignedInt128Ty);
    }
  }
  // We weren't able to match up a type name, just search by size
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedCharTy))
    return GetType(ast.UnsignedCharTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedShortTy))
    return GetType(ast.UnsignedShortTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedIntTy))
    return GetType(ast.UnsignedIntTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedLongTy))
    return GetType(ast.UnsignedLongTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedLongLongTy))
    return GetType(ast.UnsignedLongLongTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedInt128Ty))
    return GetType(ast.UnsignedInt128Ty);
  break;

case DW_ATE_unsigned_char:
  if (!ast.getLangOpts().CharIsSigned && type_name == "char") {
    if (QualTypeMatchesBitSize(bit_size, ast, ast.CharTy))
      return GetType(ast.CharTy);
  }
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedCharTy))
    return GetType(ast.UnsignedCharTy);
  if (QualTypeMatchesBitSize(bit_size, ast, ast.UnsignedShortTy))
    return GetType(ast.UnsignedShortTy);
  break;

case DW_ATE_imaginary_float:
  break;

case DW_ATE_UTF:
  switch (bit_size) {
  case 8:
    return GetType(ast.Char8Ty);
  case 16:
    return GetType(ast.Char16Ty);
  case 32:
    return GetType(ast.Char32Ty);
  default:
    if (!type_name.empty()) {
      if (type_name == "char16_t")
        return GetType(ast.Char16Ty);
      if (type_name == "char32_t")
        return GetType(ast.Char32Ty);
      if (type_name == "char8_t")
        return GetType(ast.Char8Ty);
    }
  }
  break;
}
// This assert should fire for anything that we don't catch above so we know
// to fix any issues we run into.
if (!type_name.empty()) {
  std::string type_name_str = type_name.str();
  Host::SystemLog(Host::eSystemLogError,
                  "error: need to add support for DW_TAG_base_type '%s' "
                  "encoded with DW_ATE = 0x%x, bit_size = %u\n",
                  type_name_str.c_str(), dw_ate, bit_size);
} else {
  Host::SystemLog(Host::eSystemLogError, "error: need to add support for "
                                         "DW_TAG_base_type encoded with "
                                         "DW_ATE = 0x%x, bit_size = %u\n",
                  dw_ate, bit_size);
}
return CompilerType();
1171}

1173CompilerType TypeSystemClang::GetCStringType(bool is_const) {
ASTContext &ast = getASTContext();
QualType char_type(ast.CharTy);

if (is_const)
  char_type.addConst();

return GetType(ast.getPointerType(char_type));
1181}

1183bool TypeSystemClang::AreTypesSame(CompilerType type1, CompilerType type2,
                                 bool ignore_qualifiers) {
TypeSystemClang *ast =
    llvm::dyn_cast_or_null<TypeSystemClang>(type1.GetTypeSystem());
if (!ast || ast != type2.GetTypeSystem())
  return false;

if (type1.GetOpaqueQualType() == type2.GetOpaqueQualType())
  return true;

QualType type1_qual = ClangUtil::GetQualType(type1);
QualType type2_qual = ClangUtil::GetQualType(type2);

if (ignore_qualifiers) {
  type1_qual = type1_qual.getUnqualifiedType();
  type2_qual = type2_qual.getUnqualifiedType();
}

return ast->getASTContext().hasSameType(type1_qual, type2_qual);
1202}

1204CompilerType TypeSystemClang::GetTypeForDecl(void *opaque_decl) {
if (!opaque_decl)
  return CompilerType();

clang::Decl *decl = static_cast<clang::Decl *>(opaque_decl);
if (auto *named_decl = llvm::dyn_cast<clang::NamedDecl>(decl))
  return GetTypeForDecl(named_decl);
return CompilerType();
1212}

1214CompilerDeclContext TypeSystemClang::CreateDeclContext(DeclContext *ctx) {
// Check that the DeclContext actually belongs to this ASTContext.
assert(&ctx->getParentASTContext() == &getASTContext())((void)0);
return CompilerDeclContext(this, ctx);
1218}

1220CompilerType TypeSystemClang::GetTypeForDecl(clang::NamedDecl *decl) {
if (clang::ObjCInterfaceDecl *interface_decl =
    llvm::dyn_cast<clang::ObjCInterfaceDecl>(decl))
  return GetTypeForDecl(interface_decl);
if (clang::TagDecl *tag_decl = llvm::dyn_cast<clang::TagDecl>(decl))
  return GetTypeForDecl(tag_decl);
return CompilerType();
1227}

1229CompilerType TypeSystemClang::GetTypeForDecl(TagDecl *decl) {
return GetType(getASTContext().getTagDeclType(decl));
1231}

1233CompilerType TypeSystemClang::GetTypeForDecl(ObjCInterfaceDecl *decl) {
return GetType(getASTContext().getObjCInterfaceType(decl));
1235}

1237#pragma mark Structure, Unions, Classes

1239void TypeSystemClang::SetOwningModule(clang::Decl *decl,
                                    OptionalClangModuleID owning_module) {
if (!decl || !owning_module.HasValue())
  return;

decl->setFromASTFile();
decl->setOwningModuleID(owning_module.GetValue());
decl->setModuleOwnershipKind(clang::Decl::ModuleOwnershipKind::Visible);
1247}

1249OptionalClangModuleID
1250TypeSystemClang::GetOrCreateClangModule(llvm::StringRef name,
                                      OptionalClangModuleID parent,
                                      bool is_framework, bool is_explicit) {
// Get the external AST source which holds the modules.
auto *ast_source = llvm::dyn_cast_or_null<ClangExternalASTSourceCallbacks>(
    getASTContext().getExternalSource());
assert(ast_source && "external ast source was lost")((void)0);
if (!ast_source)
  return {};

// Lazily initialize the module map.
if (!m_header_search_up) {
  auto HSOpts = std::make_shared<clang::HeaderSearchOptions>();
  m_header_search_up = std::make_unique<clang::HeaderSearch>(
      HSOpts, *m_source_manager_up, *m_diagnostics_engine_up,
      *m_language_options_up, m_target_info_up.get());
  m_module_map_up = std::make_unique<clang::ModuleMap>(
      *m_source_manager_up, *m_diagnostics_engine_up, *m_language_options_up,
      m_target_info_up.get(), *m_header_search_up);
}

// Get or create the module context.
bool created;
clang::Module *module;
auto parent_desc = ast_source->getSourceDescriptor(parent.GetValue());
std::tie(module, created) = m_module_map_up->findOrCreateModule(
    name, parent_desc ? parent_desc->getModuleOrNull() : nullptr,
    is_framework, is_explicit);
if (!created)
  return ast_source->GetIDForModule(module);

return ast_source->RegisterModule(module);
1282}

1284CompilerType TypeSystemClang::CreateRecordType(
  clang::DeclContext *decl_ctx, OptionalClangModuleID owning_module,
  AccessType access_type, llvm::StringRef name, int kind,
  LanguageType language, ClangASTMetadata *metadata, bool exports_symbols) {
ASTContext &ast = getASTContext();

if (decl_ctx == nullptr)
  decl_ctx = ast.getTranslationUnitDecl();

if (language == eLanguageTypeObjC ||
    language == eLanguageTypeObjC_plus_plus) {
  bool isForwardDecl = true;
  bool isInternal = false;
  return CreateObjCClass(name, decl_ctx, owning_module, isForwardDecl,
                         isInternal, metadata);
}

// NOTE: Eventually CXXRecordDecl will be merged back into RecordDecl and
// we will need to update this code. I was told to currently always use the
// CXXRecordDecl class since we often don't know from debug information if
// something is struct or a class, so we default to always use the more
// complete definition just in case.

bool has_name = !name.empty();
CXXRecordDecl *decl = CXXRecordDecl::CreateDeserialized(ast, 0);
decl->setTagKind(static_cast<TagDecl::TagKind>(kind));
decl->setDeclContext(decl_ctx);
if (has_name)
  decl->setDeclName(&ast.Idents.get(name));
SetOwningModule(decl, owning_module);

if (!has_name) {
  // In C++ a lambda is also represented as an unnamed class. This is
  // different from an *anonymous class* that the user wrote:
  //
  // struct A {
  //  // anonymous class (GNU/MSVC extension)
  //  struct {
  //    int x;
  //  };
  //  // unnamed class within a class
  //  struct {
  //    int y;
  //  } B;
  // };
  //
  // void f() {
  //    // unammed class outside of a class
  //    struct {
  //      int z;
  //    } C;
  // }
  //
  // Anonymous classes is a GNU/MSVC extension that clang supports. It
  // requires the anonymous class be embedded within a class. So the new
  // heuristic verifies this condition.
  if (isa<CXXRecordDecl>(decl_ctx) && exports_symbols)
    decl->setAnonymousStructOrUnion(true);
}

if (decl) {
  if (metadata)
    SetMetadata(decl, *metadata);

  if (access_type != eAccessNone)
    decl->setAccess(ConvertAccessTypeToAccessSpecifier(access_type));

  if (decl_ctx)
    decl_ctx->addDecl(decl);

  return GetType(ast.getTagDeclType(decl));
}
return CompilerType();
1357}

1359namespace {
1360/// Returns true iff the given TemplateArgument should be represented as an
1361/// NonTypeTemplateParmDecl in the AST.
1362bool IsValueParam(const clang::TemplateArgument &argument) {
return argument.getKind() == TemplateArgument::Integral;
1364}
1365}

1367static TemplateParameterList *CreateTemplateParameterList(
  ASTContext &ast,
  const TypeSystemClang::TemplateParameterInfos &template_param_infos,
  llvm::SmallVector<NamedDecl *, 8> &template_param_decls) {
const bool parameter_pack = false;
const bool is_typename = false;
const unsigned depth = 0;
const size_t num_template_params = template_param_infos.args.size();
DeclContext *const decl_context =
    ast.getTranslationUnitDecl(); // Is this the right decl context?,
for (size_t i = 0; i < num_template_params; ++i) {
  const char *name = template_param_infos.names[i];

  IdentifierInfo *identifier_info = nullptr;
  if (name && name[0])
    identifier_info = &ast.Idents.get(name);
  if (IsValueParam(template_param_infos.args[i])) {
    QualType template_param_type =
        template_param_infos.args[i].getIntegralType();
    template_param_decls.push_back(NonTypeTemplateParmDecl::Create(
        ast, decl_context, SourceLocation(), SourceLocation(), depth, i,
        identifier_info, template_param_type, parameter_pack,
        ast.getTrivialTypeSourceInfo(template_param_type)));
  } else {
    template_param_decls.push_back(TemplateTypeParmDecl::Create(
        ast, decl_context, SourceLocation(), SourceLocation(), depth, i,
        identifier_info, is_typename, parameter_pack));
  }
}

if (template_param_infos.packed_args) {
  IdentifierInfo *identifier_info = nullptr;
  if (template_param_infos.pack_name && template_param_infos.pack_name[0])
    identifier_info = &ast.Idents.get(template_param_infos.pack_name);
  const bool parameter_pack_true = true;

  if (!template_param_infos.packed_args->args.empty() &&
      IsValueParam(template_param_infos.packed_args->args[0])) {
    QualType template_param_type =
        template_param_infos.packed_args->args[0].getIntegralType();
    template_param_decls.push_back(NonTypeTemplateParmDecl::Create(
        ast, decl_context, SourceLocation(), SourceLocation(), depth,
        num_template_params, identifier_info, template_param_type,
        parameter_pack_true,
        ast.getTrivialTypeSourceInfo(template_param_type)));
  } else {
    template_param_decls.push_back(TemplateTypeParmDecl::Create(
        ast, decl_context, SourceLocation(), SourceLocation(), depth,
        num_template_params, identifier_info, is_typename,
        parameter_pack_true));
  }
}
clang::Expr *const requires_clause = nullptr; // TODO: Concepts
TemplateParameterList *template_param_list = TemplateParameterList::Create(
    ast, SourceLocation(), SourceLocation(), template_param_decls,
    SourceLocation(), requires_clause);
return template_param_list;
1424}

1426clang::FunctionTemplateDecl *TypeSystemClang::CreateFunctionTemplateDecl(
  clang::DeclContext *decl_ctx, OptionalClangModuleID owning_module,
  clang::FunctionDecl *func_decl,
  const TemplateParameterInfos &template_param_infos) {
//    /// Create a function template node.
ASTContext &ast = getASTContext();

llvm::SmallVector<NamedDecl *, 8> template_param_decls;
TemplateParameterList *template_param_list = CreateTemplateParameterList(
    ast, template_param_infos, template_param_decls);
FunctionTemplateDecl *func_tmpl_decl =
    FunctionTemplateDecl::CreateDeserialized(ast, 0);
func_tmpl_decl->setDeclContext(decl_ctx);
func_tmpl_decl->setLocation(func_decl->getLocation());
func_tmpl_decl->setDeclName(func_decl->getDeclName());
func_tmpl_decl->init(func_decl, template_param_list);
SetOwningModule(func_tmpl_decl, owning_module);

for (size_t i = 0, template_param_decl_count = template_param_decls.size();
     i < template_param_decl_count; ++i) {
  // TODO: verify which decl context we should put template_param_decls into..
  template_param_decls[i]->setDeclContext(func_decl);
}
// Function templates inside a record need to have an access specifier.
// It doesn't matter what access specifier we give the template as LLDB
// anyway allows accessing everything inside a record.
if (decl_ctx->isRecord())
  func_tmpl_decl->setAccess(clang::AccessSpecifier::AS_public);

return func_tmpl_decl;
1456}

1458void TypeSystemClang::CreateFunctionTemplateSpecializationInfo(
  FunctionDecl *func_decl, clang::FunctionTemplateDecl *func_tmpl_decl,
  const TemplateParameterInfos &infos) {
TemplateArgumentList *template_args_ptr =
    TemplateArgumentList::CreateCopy(func_decl->getASTContext(), infos.args);

func_decl->setFunctionTemplateSpecialization(func_tmpl_decl,
                                             template_args_ptr, nullptr);
1466}

1468/// Returns true if the given template parameter can represent the given value.
1469/// For example, `typename T` can represent `int` but not integral values such
1470/// as `int I = 3`.
1471static bool TemplateParameterAllowsValue(NamedDecl *param,
                                       const TemplateArgument &value) {
if (auto *type_param = llvm::dyn_cast<TemplateTypeParmDecl>(param)) {
  // Compare the argument kind, i.e. ensure that <typename> != <int>.
  if (value.getKind() != TemplateArgument::Type)
    return false;
} else if (auto *type_param =
               llvm::dyn_cast<NonTypeTemplateParmDecl>(param)) {
  // Compare the argument kind, i.e. ensure that <typename> != <int>.
  if (!IsValueParam(value))
    return false;
  // Compare the integral type, i.e. ensure that <int> != <char>.
  if (type_param->getType() != value.getIntegralType())
    return false;
} else {
  // There is no way to create other parameter decls at the moment, so we
  // can't reach this case during normal LLDB usage. Log that this happened
  // and assert.
  Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS(1u << 8));
  LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp"
, __func__, "Don't know how to compare template parameter to passed"
 " value. Decl kind of parameter is: {0}", param->getDeclKindName
()); } while (0)
           "Don't know how to compare template parameter to passed"do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp"
, __func__, "Don't know how to compare template parameter to passed"
 " value. Decl kind of parameter is: {0}", param->getDeclKindName
()); } while (0)
           " value. Decl kind of parameter is: {0}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp"
, __func__, "Don't know how to compare template parameter to passed"
 " value. Decl kind of parameter is: {0}", param->getDeclKindName
()); } while (0)
           param->getDeclKindName())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp"
, __func__, "Don't know how to compare template parameter to passed"
 " value. Decl kind of parameter is: {0}", param->getDeclKindName
()); } while (0);
  lldbassert(false && "Can't compare this TemplateParmDecl subclass")lldb_private::lldb_assert(static_cast<bool>(false &&
 "Can't compare this TemplateParmDecl subclass"), "false && \"Can't compare this TemplateParmDecl subclass\""
, __FUNCTION__, "/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp"
, 1494);
  // In release builds just fall back to marking the parameter as not
  // accepting the value so that we don't try to fit an instantiation to a
  // template that doesn't fit. E.g., avoid that `S<1>` is being connected to
  // `template<typename T> struct S;`.
  return false;
}
return true;
1502}

1504/// Returns true if the given class template declaration could produce an
1505/// instantiation with the specified values.
1506/// For example, `<typename T>` allows the arguments `float`, but not for
1507/// example `bool, float` or `3` (as an integer parameter value).
1508static bool ClassTemplateAllowsToInstantiationArgs(
  ClassTemplateDecl *class_template_decl,
  const TypeSystemClang::TemplateParameterInfos &instantiation_values) {

TemplateParameterList &params = *class_template_decl->getTemplateParameters();

// Save some work by iterating only once over the found parameters and
// calculate the information related to parameter packs.

// Contains the first pack parameter (or non if there are none).
llvm::Optional<NamedDecl *> pack_parameter;
// Contains the number of non-pack parameters.
size_t non_pack_params = params.size();
for (size_t i = 0; i < params.size(); ++i) {
  NamedDecl *param = params.getParam(i);
  if (param->isParameterPack()) {
    pack_parameter = param;
    non_pack_params = i;
    break;
  }
}

// The found template needs to have compatible non-pack template arguments.
// E.g., ensure that <typename, typename> != <typename>.
// The pack parameters are compared later.
if (non_pack_params != instantiation_values.args.size())
  return false;

// Ensure that <typename...> != <typename>.
if (pack_parameter.hasValue() != instantiation_values.hasParameterPack())
  return false;

// Compare the first pack parameter that was found with the first pack
// parameter value. The special case of having an empty parameter pack value
// always fits to a pack parameter.
// E.g., ensure that <int...> != <typename...>.
if (pack_parameter && !instantiation_values.packed_args->args.empty() &&
    !TemplateParameterAllowsValue(
        *pack_parameter, instantiation_values.packed_args->args.front()))
  return false;

// Compare all the non-pack parameters now.
// E.g., ensure that <int> != <long>.
for (const auto pair : llvm::zip_first(instantiation_values.args, params)) {
  const TemplateArgument &passed_arg = std::get<0>(pair);
  NamedDecl *found_param = std::get<1>(pair);
  if (!TemplateParameterAllowsValue(found_param, passed_arg))
    return false;
}

return class_template_decl;
1559}

1561ClassTemplateDecl *TypeSystemClang::CreateClassTemplateDecl(
  DeclContext *decl_ctx, OptionalClangModuleID owning_module,
  lldb::AccessType access_type, const char *class_name, int kind,
  const TemplateParameterInfos &template_param_infos) {
ASTContext &ast = getASTContext();

ClassTemplateDecl *class_template_decl = nullptr;
if (decl_ctx == nullptr)
  decl_ctx = ast.getTranslationUnitDecl();

IdentifierInfo &identifier_info = ast.Idents.get(class_name);
DeclarationName decl_name(&identifier_info);

// Search the AST for an existing ClassTemplateDecl that could be reused.
clang::DeclContext::lookup_result result = decl_ctx->lookup(decl_name);
for (NamedDecl *decl : result) {
  class_template_decl = dyn_cast<clang::ClassTemplateDecl>(decl);
  if (!class_template_decl)
    continue;
  // The class template has to be able to represents the instantiation
  // values we received. Without this we might end up putting an instantiation
  // with arguments such as <int, int> to a template such as:
  //     template<typename T> struct S;
  // Connecting the instantiation to an incompatible template could cause
  // problems later on.
  if (!ClassTemplateAllowsToInstantiationArgs(class_template_decl,
                                              template_param_infos))
    continue;
  return class_template_decl;
}

llvm::SmallVector<NamedDecl *, 8> template_param_decls;

TemplateParameterList *template_param_list = CreateTemplateParameterList(
    ast, template_param_infos, template_param_decls);

CXXRecordDecl *template_cxx_decl = CXXRecordDecl::CreateDeserialized(ast, 0);
template_cxx_decl->setTagKind(static_cast<TagDecl::TagKind>(kind));
// What decl context do we use here? TU? The actual decl context?
template_cxx_decl->setDeclContext(decl_ctx);
template_cxx_decl->setDeclName(decl_name);
SetOwningModule(template_cxx_decl, owning_module);

for (size_t i = 0, template_param_decl_count = template_param_decls.size();
     i < template_param_decl_count; ++i) {
  template_param_decls[i]->setDeclContext(template_cxx_decl);
}

// With templated classes, we say that a class is templated with
// specializations, but that the bare class has no functions.
// template_cxx_decl->startDefinition();
// template_cxx_decl->completeDefinition();

class_template_decl = ClassTemplateDecl::CreateDeserialized(ast, 0);
// What decl context do we use here? TU? The actual decl context?
class_template_decl->setDeclContext(decl_ctx);
class_template_decl->setDeclName(decl_name);
class_template_decl->init(template_cxx_decl, template_param_list);
template_cxx_decl->setDescribedClassTemplate(class_template_decl);
SetOwningModule(class_template_decl, owning_module);

if (class_template_decl) {
  if (access_type != eAccessNone)
    class_template_decl->setAccess(
        ConvertAccessTypeToAccessSpecifier(access_type));

  decl_ctx->addDecl(class_template_decl);

  VerifyDecl(class_template_decl);
}

return class_template_decl;
1633}

1635TemplateTemplateParmDecl *
1636TypeSystemClang::CreateTemplateTemplateParmDecl(const char *template_name) {
ASTContext &ast = getASTContext();

auto *decl_ctx = ast.getTranslationUnitDecl();

IdentifierInfo &identifier_info = ast.Idents.get(template_name);
llvm::SmallVector<NamedDecl *, 8> template_param_decls;

TypeSystemClang::TemplateParameterInfos template_param_infos;
TemplateParameterList *template_param_list = CreateTemplateParameterList(
    ast, template_param_infos, template_param_decls);

// LLDB needs to create those decls only to be able to display a
// type that includes a template template argument. Only the name matters for
// this purpose, so we use dummy values for the other characteristics of the
// type.
return TemplateTemplateParmDecl::Create(
    ast, decl_ctx, SourceLocation(),
    /*Depth*/ 0, /*Position*/ 0,
    /*IsParameterPack*/ false, &identifier_info, template_param_list);
1656}

1658ClassTemplateSpecializationDecl *
1659TypeSystemClang::CreateClassTemplateSpecializationDecl(
  DeclContext *decl_ctx, OptionalClangModuleID owning_module,
  ClassTemplateDecl *class_template_decl, int kind,
  const TemplateParameterInfos &template_param_infos) {
ASTContext &ast = getASTContext();
llvm::SmallVector<clang::TemplateArgument, 2> args(
    template_param_infos.args.size() +
    (template_param_infos.packed_args ? 1 : 0));
std::copy(template_param_infos.args.begin(), template_param_infos.args.end(),
          args.begin());
if (template_param_infos.packed_args) {
  args[args.size() - 1] = TemplateArgument::CreatePackCopy(
      ast, template_param_infos.packed_args->args);
}
ClassTemplateSpecializationDecl *class_template_specialization_decl =
    ClassTemplateSpecializationDecl::CreateDeserialized(ast, 0);
class_template_specialization_decl->setTagKind(
    static_cast<TagDecl::TagKind>(kind));
class_template_specialization_decl->setDeclContext(decl_ctx);
class_template_specialization_decl->setInstantiationOf(class_template_decl);
class_template_specialization_decl->setTemplateArgs(
    TemplateArgumentList::CreateCopy(ast, args));
ast.getTypeDeclType(class_template_specialization_decl, nullptr);
class_template_specialization_decl->setDeclName(
    class_template_decl->getDeclName());
SetOwningModule(class_template_specialization_decl, owning_module);
decl_ctx->addDecl(class_template_specialization_decl);

class_template_specialization_decl->setSpecializationKind(
    TSK_ExplicitSpecialization);

return class_template_specialization_decl;
1691}

1693CompilerType TypeSystemClang::CreateClassTemplateSpecializationType(
  ClassTemplateSpecializationDecl *class_template_specialization_decl) {
if (class_template_specialization_decl) {
  ASTContext &ast = getASTContext();
  return GetType(ast.getTagDeclType(class_template_specialization_decl));
}
return CompilerType();
1700}

1702static inline bool check_op_param(bool is_method,
                                clang::OverloadedOperatorKind op_kind,
                                bool unary, bool binary,
                                uint32_t num_params) {
// Special-case call since it can take any number of operands
if (op_kind == OO_Call)
  return true;

// The parameter count doesn't include "this"
if (is_method)
  ++num_params;
if (num_params == 1)
  return unary;
if (num_params == 2)
  return binary;
else
  return false;
1719}

1721bool TypeSystemClang::CheckOverloadedOperatorKindParameterCount(
  bool is_method, clang::OverloadedOperatorKind op_kind,
  uint32_t num_params) {
switch (op_kind) {
default:
  break;
// C++ standard allows any number of arguments to new/delete
case OO_New:
case OO_Array_New:
case OO_Delete:
case OO_Array_Delete:
  return true;
}

1735#define OVERLOADED_OPERATOR(Name, Spelling, Token, Unary, Binary, MemberOnly)  \
case OO_##Name:                                                              \
  return check_op_param(is_method, op_kind, Unary, Binary, num_params);
switch (op_kind) {
1739#include "clang/Basic/OperatorKinds.def"
default:
  break;
}
return false;
1744}

1746clang::AccessSpecifier
1747TypeSystemClang::UnifyAccessSpecifiers(clang::AccessSpecifier lhs,
                                     clang::AccessSpecifier rhs) {
// Make the access equal to the stricter of the field and the nested field's
// access
if (lhs == AS_none || rhs == AS_none)
  return AS_none;
if (lhs == AS_private || rhs == AS_private)
  return AS_private;
if (lhs == AS_protected || rhs == AS_protected)
  return AS_protected;
return AS_public;
1758}

1760bool TypeSystemClang::FieldIsBitfield(FieldDecl *field,
                                    uint32_t &bitfield_bit_size) {
ASTContext &ast = getASTContext();
if (field == nullptr)
  return false;

if (field->isBitField()) {
  Expr *bit_width_expr = field->getBitWidth();
  if (bit_width_expr) {
    if (Optional<llvm::APSInt> bit_width_apsint =
            bit_width_expr->getIntegerConstantExpr(ast)) {
      bitfield_bit_size = bit_width_apsint->getLimitedValue(UINT32_MAX0xffffffffU);
      return true;
    }
  }
}
return false;
1777}

1779bool TypeSystemClang::RecordHasFields(const RecordDecl *record_decl) {
if (record_decl == nullptr)
  return false;

if (!record_decl->field_empty())
  return true;

// No fields, lets check this is a CXX record and check the base classes
const CXXRecordDecl *cxx_record_decl = dyn_cast<CXXRecordDecl>(record_decl);
if (cxx_record_decl) {
  CXXRecordDecl::base_class_const_iterator base_class, base_class_end;
  for (base_class = cxx_record_decl->bases_begin(),
      base_class_end = cxx_record_decl->bases_end();
       base_class != base_class_end; ++base_class) {
    const CXXRecordDecl *base_class_decl = cast<CXXRecordDecl>(
        base_class->getType()->getAs<RecordType>()->getDecl());
    if (RecordHasFields(base_class_decl))
      return true;
  }
}
return false;
1800}

1802#pragma mark Objective-C Classes

1804CompilerType TypeSystemClang::CreateObjCClass(
  llvm::StringRef name, clang::DeclContext *decl_ctx,
  OptionalClangModuleID owning_module, bool isForwardDecl, bool isInternal,
  ClangASTMetadata *metadata) {
ASTContext &ast = getASTContext();
assert(!name.empty())((void)0);
if (!decl_ctx)
  decl_ctx = ast.getTranslationUnitDecl();

ObjCInterfaceDecl *decl = ObjCInterfaceDecl::CreateDeserialized(ast, 0);
decl->setDeclContext(decl_ctx);
decl->setDeclName(&ast.Idents.get(name));
/*isForwardDecl,*/
decl->setImplicit(isInternal);
SetOwningModule(decl, owning_module);

if (decl && metadata)
  SetMetadata(decl, *metadata);

return GetType(ast.getObjCInterfaceType(decl));
1824}

1826static inline bool BaseSpecifierIsEmpty(const CXXBaseSpecifier *b) {
return !TypeSystemClang::RecordHasFields(b->getType()->getAsCXXRecordDecl());
1828}

1830uint32_t
1831TypeSystemClang::GetNumBaseClasses(const CXXRecordDecl *cxx_record_decl,
                                 bool omit_empty_base_classes) {
uint32_t num_bases = 0;
if (cxx_record_decl) {
  if (omit_empty_base_classes) {
    CXXRecordDecl::base_class_const_iterator base_class, base_class_end;
    for (base_class = cxx_record_decl->bases_begin(),
        base_class_end = cxx_record_decl->bases_end();
         base_class != base_class_end; ++base_class) {
      // Skip empty base classes
      if (BaseSpecifierIsEmpty(base_class))
        continue;
      ++num_bases;
    }
  } else
    num_bases = cxx_record_decl->getNumBases();
}
return num_bases;
1849}

1851#pragma mark Namespace Declarations

1853NamespaceDecl *TypeSystemClang::GetUniqueNamespaceDeclaration(
  const char *name, clang::DeclContext *decl_ctx,
  OptionalClangModuleID owning_module, bool is_inline) {
NamespaceDecl *namespace_decl = nullptr;
ASTContext &ast = getASTContext();
TranslationUnitDecl *translation_unit_decl = ast.getTranslationUnitDecl();
if (!decl_ctx)
  decl_ctx = translation_unit_decl;

if (name) {
  IdentifierInfo &identifier_info = ast.Idents.get(name);
  DeclarationName decl_name(&identifier_info);
  clang::DeclContext::lookup_result result = decl_ctx->lookup(decl_name);
  for (NamedDecl *decl : result) {
    namespace_decl = dyn_cast<clang::NamespaceDecl>(decl);
    if (namespace_decl)
      return namespace_decl;
  }

  namespace_decl =
      NamespaceDecl::Create(ast, decl_ctx, is_inline, SourceLocation(),
                            SourceLocation(), &identifier_info, nullptr);

  decl_ctx->addDecl(namespace_decl);
} else {
  if (decl_ctx == translation_unit_decl) {
    namespace_decl = translation_unit_decl->getAnonymousNamespace();
    if (namespace_decl)
      return namespace_decl;

    namespace_decl =
        NamespaceDecl::Create(ast, decl_ctx, false, SourceLocation(),
                              SourceLocation(), nullptr, nullptr);
    translation_unit_decl->setAnonymousNamespace(namespace_decl);
    translation_unit_decl->addDecl(namespace_decl);
    assert(namespace_decl == translation_unit_decl->getAnonymousNamespace())((void)0);
  } else {
    NamespaceDecl *parent_namespace_decl = cast<NamespaceDecl>(decl_ctx);
    if (parent_namespace_decl) {
      namespace_decl = parent_namespace_decl->getAnonymousNamespace();
      if (namespace_decl)
        return namespace_decl;
      namespace_decl =
          NamespaceDecl::Create(ast, decl_ctx, false, SourceLocation(),
                                SourceLocation(), nullptr, nullptr);
      parent_namespace_decl->setAnonymousNamespace(namespace_decl);
      parent_namespace_decl->addDecl(namespace_decl);
      assert(namespace_decl ==((void)0)
             parent_namespace_decl->getAnonymousNamespace())((void)0);
    } else {
      assert(false && "GetUniqueNamespaceDeclaration called with no name and "((void)0)
                      "no namespace as decl_ctx")((void)0);
    }
  }
}
// Note: namespaces can span multiple modules, so perhaps this isn't a good
// idea.
SetOwningModule(namespace_decl, owning_module);

VerifyDecl(namespace_decl);
return namespace_decl;
1914}

1916clang::BlockDecl *
1917TypeSystemClang::CreateBlockDeclaration(clang::DeclContext *ctx,
                                      OptionalClangModuleID owning_module) {
if (ctx) {
  clang::BlockDecl *decl =
      clang::BlockDecl::CreateDeserialized(getASTContext(), 0);
  decl->setDeclContext(ctx);
  ctx->addDecl(decl);
  SetOwningModule(decl, owning_module);
  return decl;
}
return nullptr;
1928}

1930clang::DeclContext *FindLCABetweenDecls(clang::DeclContext *left,
                                      clang::DeclContext *right,
                                      clang::DeclContext *root) {
if (root == nullptr)
  return nullptr;

std::set<clang::DeclContext *> path_left;
for (clang::DeclContext *d = left; d != nullptr; d = d->getParent())
  path_left.insert(d);

for (clang::DeclContext *d = right; d != nullptr; d = d->getParent())
  if (path_left.find(d) != path_left.end())
    return d;

return nullptr;
1945}

1947clang::UsingDirectiveDecl *TypeSystemClang::CreateUsingDirectiveDeclaration(
  clang::DeclContext *decl_ctx, OptionalClangModuleID owning_module,
  clang::NamespaceDecl *ns_decl) {
if (decl_ctx && ns_decl) {
  auto *translation_unit = getASTContext().getTranslationUnitDecl();
  clang::UsingDirectiveDecl *using_decl = clang::UsingDirectiveDecl::Create(
        getASTContext(), decl_ctx, clang::SourceLocation(),
        clang::SourceLocation(), clang::NestedNameSpecifierLoc(),
        clang::SourceLocation(), ns_decl,
        FindLCABetweenDecls(decl_ctx, ns_decl,
                            translation_unit));
    decl_ctx->addDecl(using_decl);
    SetOwningModule(using_decl, owning_module);
    return using_decl;
}
return nullptr;
1963}

1965clang::UsingDecl *
1966TypeSystemClang::CreateUsingDeclaration(clang::DeclContext *current_decl_ctx,
                                      OptionalClangModuleID owning_module,
                                      clang::NamedDecl *target) {
if (current_decl_ctx && target) {
  clang::UsingDecl *using_decl = clang::UsingDecl::Create(
      getASTContext(), current_decl_ctx, clang::SourceLocation(),
      clang::NestedNameSpecifierLoc(), clang::DeclarationNameInfo(), false);
  SetOwningModule(using_decl, owning_module);
  clang::UsingShadowDecl *shadow_decl = clang::UsingShadowDecl::Create(
      getASTContext(), current_decl_ctx, clang::SourceLocation(),
      target->getDeclName(), using_decl, target);
  SetOwningModule(shadow_decl, owning_module);
  using_decl->addShadowDecl(shadow_decl);
  current_decl_ctx->addDecl(using_decl);
  return using_decl;
}
return nullptr;
1983}

1985clang::VarDecl *TypeSystemClang::CreateVariableDeclaration(
  clang::DeclContext *decl_context, OptionalClangModuleID owning_module,
  const char *name, clang::QualType type) {
if (decl_context) {
  clang::VarDecl *var_decl =
      clang::VarDecl::CreateDeserialized(getASTContext(), 0);
  var_decl->setDeclContext(decl_context);
  if (name && name[0])
    var_decl->setDeclName(&getASTContext().Idents.getOwn(name));
  var_decl->setType(type);
  SetOwningModule(var_decl, owning_module);
  var_decl->setAccess(clang::AS_public);
  decl_context->addDecl(var_decl);
  return var_decl;
}
return nullptr;
2001}

2003lldb::opaque_compiler_type_t
2004TypeSystemClang::GetOpaqueCompilerType(clang::ASTContext *ast,
                                     lldb::BasicType basic_type) {
switch (basic_type) {
case eBasicTypeVoid:
  return ast->VoidTy.getAsOpaquePtr();
case eBasicTypeChar:
  return ast->CharTy.getAsOpaquePtr();
case eBasicTypeSignedChar:
  return ast->SignedCharTy.getAsOpaquePtr();
case eBasicTypeUnsignedChar:
  return ast->UnsignedCharTy.getAsOpaquePtr();
case eBasicTypeWChar:
  return ast->getWCharType().getAsOpaquePtr();
case eBasicTypeSignedWChar:
  return ast->getSignedWCharType().getAsOpaquePtr();
case eBasicTypeUnsignedWChar:
  return ast->getUnsignedWCharType().getAsOpaquePtr();
case eBasicTypeChar16:
  return ast->Char16Ty.getAsOpaquePtr();
case eBasicTypeChar32:
  return ast->Char32Ty.getAsOpaquePtr();
case eBasicTypeShort:
  return ast->ShortTy.getAsOpaquePtr();
case eBasicTypeUnsignedShort:
  return ast->UnsignedShortTy.getAsOpaquePtr();
case eBasicTypeInt:
  return ast->IntTy.getAsOpaquePtr();
case eBasicTypeUnsignedInt:
  return ast->UnsignedIntTy.getAsOpaquePtr();
case eBasicTypeLong:
  return ast->LongTy.getAsOpaquePtr();
case eBasicTypeUnsignedLong:
  return ast->UnsignedLongTy.getAsOpaquePtr();
case eBasicTypeLongLong:
  return ast->LongLongTy.getAsOpaquePtr();
case eBasicTypeUnsignedLongLong:
  return ast->UnsignedLongLongTy.getAsOpaquePtr();
case eBasicTypeInt128:
  return ast->Int128Ty.getAsOpaquePtr();
case eBasicTypeUnsignedInt128:
  return ast->UnsignedInt128Ty.getAsOpaquePtr();
case eBasicTypeBool:
  return ast->BoolTy.getAsOpaquePtr();
case eBasicTypeHalf:
  return ast->HalfTy.getAsOpaquePtr();
case eBasicTypeFloat:
  return ast->FloatTy.getAsOpaquePtr();
case eBasicTypeDouble:
  return ast->DoubleTy.getAsOpaquePtr();
case eBasicTypeLongDouble:
  return ast->LongDoubleTy.getAsOpaquePtr();
case eBasicTypeFloatComplex:
  return ast->FloatComplexTy.getAsOpaquePtr();
case eBasicTypeDoubleComplex:
  return ast->DoubleComplexTy.getAsOpaquePtr();
case eBasicTypeLongDoubleComplex:
  return ast->LongDoubleComplexTy.getAsOpaquePtr();
case eBasicTypeObjCID:
  return ast->getObjCIdType().getAsOpaquePtr();
case eBasicTypeObjCClass:
  return ast->getObjCClassType().getAsOpaquePtr();
case eBasicTypeObjCSel:
  return ast->getObjCSelType().getAsOpaquePtr();
case eBasicTypeNullPtr:
  return ast->NullPtrTy.getAsOpaquePtr();
default:
  return nullptr;
}
2072}

2074#pragma mark Function Types

2076clang::DeclarationName
2077TypeSystemClang::GetDeclarationName(llvm::StringRef name,
                                  const CompilerType &function_clang_type) {
clang::OverloadedOperatorKind op_kind = clang::NUM_OVERLOADED_OPERATORS;
if (!IsOperator(name, op_kind) || op_kind == clang::NUM_OVERLOADED_OPERATORS)
  return DeclarationName(&getASTContext().Idents.get(
      name)); // Not operator, but a regular function.

// Check the number of operator parameters. Sometimes we have seen bad DWARF
// that doesn't correctly describe operators and if we try to create a method
// and add it to the class, clang will assert and crash, so we need to make
// sure things are acceptable.
clang::QualType method_qual_type(ClangUtil::GetQualType(function_clang_type));
const clang::FunctionProtoType *function_type =
    llvm::dyn_cast<clang::FunctionProtoType>(method_qual_type.getTypePtr());
if (function_type == nullptr)
  return clang::DeclarationName();

const bool is_method = false;
const unsigned int num_params = function_type->getNumParams();
if (!TypeSystemClang::CheckOverloadedOperatorKindParameterCount(
        is_method, op_kind, num_params))
  return clang::DeclarationName();

return getASTContext().DeclarationNames.getCXXOperatorName(op_kind);
2101}

2103PrintingPolicy TypeSystemClang::GetTypePrintingPolicy() {
clang::PrintingPolicy printing_policy(getASTContext().getPrintingPolicy());
printing_policy.SuppressTagKeyword = true;
// Inline namespaces are important for some type formatters (e.g., libc++
// and libstdc++ are differentiated by their inline namespaces).
printing_policy.SuppressInlineNamespace = false;
printing_policy.SuppressUnwrittenScope = false;
// Default arguments are also always important for type formatters. Otherwise
// we would need to always specify two type names for the setups where we do
// know the default arguments and where we don't know default arguments.
//
// For example, without this we would need to have formatters for both:
//   std::basic_string<char>
// and
//   std::basic_string<char, std::char_traits<char>, std::allocator<char> >
// to support setups where LLDB was able to reconstruct default arguments
// (and we then would have suppressed them from the type name) and also setups
// where LLDB wasn't able to reconstruct the default arguments.
printing_policy.SuppressDefaultTemplateArgs = false;
return printing_policy;
2123}

2125std::string TypeSystemClang::GetTypeNameForDecl(const NamedDecl *named_decl) {
clang::PrintingPolicy printing_policy = GetTypePrintingPolicy();
std::string result;
llvm::raw_string_ostream os(result);
named_decl->printQualifiedName(os, printing_policy);
return result;
2131}

2133FunctionDecl *TypeSystemClang::CreateFunctionDeclaration(
  clang::DeclContext *decl_ctx, OptionalClangModuleID owning_module,
  llvm::StringRef name, const CompilerType &function_clang_type,
  clang::StorageClass storage, bool is_inline) {
FunctionDecl *func_decl = nullptr;
ASTContext &ast = getASTContext();
if (!decl_ctx)
  decl_ctx = ast.getTranslationUnitDecl();

const bool hasWrittenPrototype = true;
const bool isConstexprSpecified = false;

clang::DeclarationName declarationName =
    GetDeclarationName(name, function_clang_type);
func_decl = FunctionDecl::CreateDeserialized(ast, 0);
func_decl->setDeclContext(decl_ctx);
func_decl->setDeclName(declarationName);
func_decl->setType(ClangUtil::GetQualType(function_clang_type));
func_decl->setStorageClass(storage);
func_decl->setInlineSpecified(is_inline);
func_decl->setHasWrittenPrototype(hasWrittenPrototype);
func_decl->setConstexprKind(isConstexprSpecified
                                ? ConstexprSpecKind::Constexpr
                                : ConstexprSpecKind::Unspecified);
SetOwningModule(func_decl, owning_module);
if (func_decl)
  decl_ctx->addDecl(func_decl);

VerifyDecl(func_decl);

return func_decl;
2164}

2166CompilerType
2167TypeSystemClang::CreateFunctionType(const CompilerType &result_type,
                                  const CompilerType *args, unsigned num_args,
                                  bool is_variadic, unsigned type_quals,
                                  clang::CallingConv cc) {
if (!result_type || !ClangUtil::IsClangType(result_type))
  return CompilerType(); // invalid return type

std::vector<QualType> qual_type_args;
if (num_args > 0 && args == nullptr)
  return CompilerType(); // invalid argument array passed in

// Verify that all arguments are valid and the right type
for (unsigned i = 0; i < num_args; ++i) {
  if (args[i]) {
    // Make sure we have a clang type in args[i] and not a type from another
    // language whose name might match
    const bool is_clang_type = ClangUtil::IsClangType(args[i]);
    lldbassert(is_clang_type)lldb_private::lldb_assert(static_cast<bool>(is_clang_type
), "is_clang_type", __FUNCTION__, "/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp"
, 2184);
    if (is_clang_type)
      qual_type_args.push_back(ClangUtil::GetQualType(args[i]));
    else
      return CompilerType(); //  invalid argument type (must be a clang type)
  } else
    return CompilerType(); // invalid argument type (empty)
}

// TODO: Detect calling convention in DWARF?
FunctionProtoType::ExtProtoInfo proto_info;
proto_info.ExtInfo = cc;
proto_info.Variadic = is_variadic;
proto_info.ExceptionSpec = EST_None;
proto_info.TypeQuals = clang::Qualifiers::fromFastMask(type_quals);
proto_info.RefQualifier = RQ_None;

return GetType(getASTContext().getFunctionType(
    ClangUtil::GetQualType(result_type), qual_type_args, proto_info));
2203}

2205ParmVarDecl *TypeSystemClang::CreateParameterDeclaration(
  clang::DeclContext *decl_ctx, OptionalClangModuleID owning_module,
  const char *name, const CompilerType &param_type, int storage,
  bool add_decl) {
ASTContext &ast = getASTContext();
auto *decl = ParmVarDecl::CreateDeserialized(ast, 0);
decl->setDeclContext(decl_ctx);
if (name && name[0])
  decl->setDeclName(&ast.Idents.get(name));
decl->setType(ClangUtil::GetQualType(param_type));
decl->setStorageClass(static_cast<clang::StorageClass>(storage));
SetOwningModule(decl, owning_module);
if (add_decl)
  decl_ctx->addDecl(decl);

return decl;
2221}

2223void TypeSystemClang::SetFunctionParameters(
  FunctionDecl *function_decl, llvm::ArrayRef<ParmVarDecl *> params) {
if (function_decl)
  function_decl->setParams(params);
2227}

2229CompilerType
2230TypeSystemClang::CreateBlockPointerType(const CompilerType &function_type) {
QualType block_type = m_ast_up->getBlockPointerType(
    clang::QualType::getFromOpaquePtr(function_type.GetOpaqueQualType()));

return GetType(block_type);
2235}

2237#pragma mark Array Types

2239CompilerType TypeSystemClang::CreateArrayType(const CompilerType &element_type,
                                            size_t element_count,
                                            bool is_vector) {
if (element_type.IsValid()) {
  ASTContext &ast = getASTContext();

  if (is_vector) {
    return GetType(ast.getExtVectorType(ClangUtil::GetQualType(element_type),
                                        element_count));
  } else {

    llvm::APInt ap_element_count(64, element_count);
    if (element_count == 0) {
      return GetType(ast.getIncompleteArrayType(
          ClangUtil::GetQualType(element_type), clang::ArrayType::Normal, 0));
    } else {
      return GetType(ast.getConstantArrayType(
          ClangUtil::GetQualType(element_type), ap_element_count, nullptr,
          clang::ArrayType::Normal, 0));
    }
  }
}
return CompilerType();
2262}

2264CompilerType TypeSystemClang::CreateStructForIdentifier(
  ConstString type_name,
  const std::initializer_list<std::pair<const char *, CompilerType>>
      &type_fields,
  bool packed) {
CompilerType type;
if (!type_name.IsEmpty() &&
    (type = GetTypeForIdentifier<clang::CXXRecordDecl>(type_name))
        .IsValid()) {
  lldbassert(0 && "Trying to create a type for an existing name")lldb_private::lldb_assert(static_cast<bool>(0 &&
 "Trying to create a type for an existing name"), "0 && \"Trying to create a type for an existing name\""
, __FUNCTION__, "/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp"
, 2273);
  return type;
}

type = CreateRecordType(nullptr, OptionalClangModuleID(), lldb::eAccessPublic,
                        type_name.GetCString(), clang::TTK_Struct,
                        lldb::eLanguageTypeC);
StartTagDeclarationDefinition(type);
for (const auto &field : type_fields)
  AddFieldToRecordType(type, field.first, field.second, lldb::eAccessPublic,
                       0);
if (packed)
  SetIsPacked(type);
CompleteTagDeclarationDefinition(type);
return type;
2288}

2290CompilerType TypeSystemClang::GetOrCreateStructForIdentifier(
  ConstString type_name,
  const std::initializer_list<std::pair<const char *, CompilerType>>
      &type_fields,
  bool packed) {
CompilerType type;
if ((type = GetTypeForIdentifier<clang::CXXRecordDecl>(type_name)).IsValid())
  return type;

return CreateStructForIdentifier(type_name, type_fields, packed);
2300}

2302#pragma mark Enumeration Types

2304CompilerType TypeSystemClang::CreateEnumerationType(
  const char *name, clang::DeclContext *decl_ctx,
  OptionalClangModuleID owning_module, const Declaration &decl,
  const CompilerType &integer_clang_type, bool is_scoped) {
// TODO: Do something intelligent with the Declaration object passed in
// like maybe filling in the SourceLocation with it...
ASTContext &ast = getASTContext();

// TODO: ask about these...
//    const bool IsFixed = false;
EnumDecl *enum_decl = EnumDecl::CreateDeserialized(ast, 0);
enum_decl->setDeclContext(decl_ctx);
if (name && name[0])
  enum_decl->setDeclName(&ast.Idents.get(name));
enum_decl->setScoped(is_scoped);
enum_decl->setScopedUsingClassTag(is_scoped);
enum_decl->setFixed(false);
SetOwningModule(enum_decl, owning_module);
if (enum_decl) {
  if (decl_ctx)
    decl_ctx->addDecl(enum_decl);

  // TODO: check if we should be setting the promotion type too?
  enum_decl->setIntegerType(ClangUtil::GetQualType(integer_clang_type));

  enum_decl->setAccess(AS_public); // TODO respect what's in the debug info

  return GetType(ast.getTagDeclType(enum_decl));
}
return CompilerType();
2334}

2336CompilerType TypeSystemClang::GetIntTypeFromBitSize(size_t bit_size,
                                                  bool is_signed) {
clang::ASTContext &ast = getASTContext();

if (is_signed) {
  if (bit_size == ast.getTypeSize(ast.SignedCharTy))
    return GetType(ast.SignedCharTy);

  if (bit_size == ast.getTypeSize(ast.ShortTy))
    return GetType(ast.ShortTy);

  if (bit_size == ast.getTypeSize(ast.IntTy))
    return GetType(ast.IntTy);

  if (bit_size == ast.getTypeSize(ast.LongTy))
    return GetType(ast.LongTy);

  if (bit_size == ast.getTypeSize(ast.LongLongTy))
    return GetType(ast.LongLongTy);

  if (bit_size == ast.getTypeSize(ast.Int128Ty))
    return GetType(ast.Int128Ty);
} else {
  if (bit_size == ast.getTypeSize(ast.UnsignedCharTy))
    return GetType(ast.UnsignedCharTy);

  if (bit_size == ast.getTypeSize(ast.UnsignedShortTy))
    return GetType(ast.UnsignedShortTy);

  if (bit_size == ast.getTypeSize(ast.UnsignedIntTy))
    return GetType(ast.UnsignedIntTy);

  if (bit_size == ast.getTypeSize(ast.UnsignedLongTy))
    return GetType(ast.UnsignedLongTy);

  if (bit_size == ast.getTypeSize(ast.UnsignedLongLongTy))
    return GetType(ast.UnsignedLongLongTy);

  if (bit_size == ast.getTypeSize(ast.UnsignedInt128Ty))
    return GetType(ast.UnsignedInt128Ty);
}
return CompilerType();
2378}

2380CompilerType TypeSystemClang::GetPointerSizedIntType(bool is_signed) {
return GetIntTypeFromBitSize(
    getASTContext().getTypeSize(getASTContext().VoidPtrTy), is_signed);
2383}

2385void TypeSystemClang::DumpDeclContextHiearchy(clang::DeclContext *decl_ctx) {
if (decl_ctx) {
  DumpDeclContextHiearchy(decl_ctx->getParent());

  clang::NamedDecl *named_decl = llvm::dyn_cast<clang::NamedDecl>(decl_ctx);
  if (named_decl) {
    printf("%20s: %s\n", decl_ctx->getDeclKindName(),
           named_decl->getDeclName().getAsString().c_str());
  } else {
    printf("%20s\n", decl_ctx->getDeclKindName());
  }
}
2397}

2399void TypeSystemClang::DumpDeclHiearchy(clang::Decl *decl) {
if (decl == nullptr)
  return;
DumpDeclContextHiearchy(decl->getDeclContext());

clang::RecordDecl *record_decl = llvm::dyn_cast<clang::RecordDecl>(decl);
if (record_decl) {
  printf("%20s: %s%s\n", decl->getDeclKindName(),
         record_decl->getDeclName().getAsString().c_str(),
         record_decl->isInjectedClassName() ? " (injected class name)" : "");

} else {
  clang::NamedDecl *named_decl = llvm::dyn_cast<clang::NamedDecl>(decl);
  if (named_decl) {
    printf("%20s: %s\n", decl->getDeclKindName(),
           named_decl->getDeclName().getAsString().c_str());
  } else {
    printf("%20s\n", decl->getDeclKindName());
  }
}
2419}

2421bool TypeSystemClang::DeclsAreEquivalent(clang::Decl *lhs_decl,
                                       clang::Decl *rhs_decl) {
if (lhs_decl && rhs_decl) {
  // Make sure the decl kinds match first
  const clang::Decl::Kind lhs_decl_kind = lhs_decl->getKind();
  const clang::Decl::Kind rhs_decl_kind = rhs_decl->getKind();

  if (lhs_decl_kind == rhs_decl_kind) {
    // Now check that the decl contexts kinds are all equivalent before we
    // have to check any names of the decl contexts...
    clang::DeclContext *lhs_decl_ctx = lhs_decl->getDeclContext();
    clang::DeclContext *rhs_decl_ctx = rhs_decl->getDeclContext();
    if (lhs_decl_ctx && rhs_decl_ctx) {
      while (true) {
        if (lhs_decl_ctx && rhs_decl_ctx) {
          const clang::Decl::Kind lhs_decl_ctx_kind =
              lhs_decl_ctx->getDeclKind();
          const clang::Decl::Kind rhs_decl_ctx_kind =
              rhs_decl_ctx->getDeclKind();
          if (lhs_decl_ctx_kind == rhs_decl_ctx_kind) {
            lhs_decl_ctx = lhs_decl_ctx->getParent();
            rhs_decl_ctx = rhs_decl_ctx->getParent();

            if (lhs_decl_ctx == nullptr && rhs_decl_ctx == nullptr)
              break;
          } else
            return false;
        } else
          return false;
      }

      // Now make sure the name of the decls match
      clang::NamedDecl *lhs_named_decl =
          llvm::dyn_cast<clang::NamedDecl>(lhs_decl);
      clang::NamedDecl *rhs_named_decl =
          llvm::dyn_cast<clang::NamedDecl>(rhs_decl);
      if (lhs_named_decl && rhs_named_decl) {
        clang::DeclarationName lhs_decl_name = lhs_named_decl->getDeclName();
        clang::DeclarationName rhs_decl_name = rhs_named_decl->getDeclName();
        if (lhs_decl_name.getNameKind() == rhs_decl_name.getNameKind()) {
          if (lhs_decl_name.getAsString() != rhs_decl_name.getAsString())
            return false;
        } else
          return false;
      } else
        return false;

      // We know that the decl context kinds all match, so now we need to
      // make sure the names match as well
      lhs_decl_ctx = lhs_decl->getDeclContext();
      rhs_decl_ctx = rhs_decl->getDeclContext();
      while (true) {
        switch (lhs_decl_ctx->getDeclKind()) {
        case clang::Decl::TranslationUnit:
          // We don't care about the translation unit names
          return true;
        default: {
          clang::NamedDecl *lhs_named_decl =
              llvm::dyn_cast<clang::NamedDecl>(lhs_decl_ctx);
          clang::NamedDecl *rhs_named_decl =
              llvm::dyn_cast<clang::NamedDecl>(rhs_decl_ctx);
          if (lhs_named_decl && rhs_named_decl) {
            clang::DeclarationName lhs_decl_name =
                lhs_named_decl->getDeclName();
            clang::DeclarationName rhs_decl_name =
                rhs_named_decl->getDeclName();
            if (lhs_decl_name.getNameKind() == rhs_decl_name.getNameKind()) {
              if (lhs_decl_name.getAsString() != rhs_decl_name.getAsString())
                return false;
            } else
              return false;
          } else
            return false;
        } break;
        }
        lhs_decl_ctx = lhs_decl_ctx->getParent();
        rhs_decl_ctx = rhs_decl_ctx->getParent();
      }
    }
  }
}
return false;
2503}
2504bool TypeSystemClang::GetCompleteDecl(clang::ASTContext *ast,
                                    clang::Decl *decl) {
if (!decl)
  return false;

ExternalASTSource *ast_source = ast->getExternalSource();

if (!ast_source)
  return false;

if (clang::TagDecl *tag_decl = llvm::dyn_cast<clang::TagDecl>(decl)) {
  if (tag_decl->isCompleteDefinition())
    return true;

  if (!tag_decl->hasExternalLexicalStorage())
    return false;

  ast_source->CompleteType(tag_decl);

  return !tag_decl->getTypeForDecl()->isIncompleteType();
} else if (clang::ObjCInterfaceDecl *objc_interface_decl =
               llvm::dyn_cast<clang::ObjCInterfaceDecl>(decl)) {
  if (objc_interface_decl->getDefinition())
    return true;

  if (!objc_interface_decl->hasExternalLexicalStorage())
    return false;

  ast_source->CompleteType(objc_interface_decl);

  return !objc_interface_decl->getTypeForDecl()->isIncompleteType();
} else {
  return false;
}
2538}

2540void TypeSystemClang::SetMetadataAsUserID(const clang::Decl *decl,
                                        user_id_t user_id) {
ClangASTMetadata meta_data;
meta_data.SetUserID(user_id);
SetMetadata(decl, meta_data);
2545}

2547void TypeSystemClang::SetMetadataAsUserID(const clang::Type *type,
                                        user_id_t user_id) {
ClangASTMetadata meta_data;
meta_data.SetUserID(user_id);
SetMetadata(type, meta_data);
2552}

2554void TypeSystemClang::SetMetadata(const clang::Decl *object,
                                ClangASTMetadata &metadata) {
m_decl_metadata[object] = metadata;
2557}

2559void TypeSystemClang::SetMetadata(const clang::Type *object,
                                ClangASTMetadata &metadata) {
m_type_metadata[object] = metadata;
2562}

2564ClangASTMetadata *TypeSystemClang::GetMetadata(const clang::Decl *object) {
auto It = m_decl_metadata.find(object);
if (It != m_decl_metadata.end())
  return &It->second;
return nullptr;
2569}

2571ClangASTMetadata *TypeSystemClang::GetMetadata(const clang::Type *object) {
auto It = m_type_metadata.find(object);
if (It != m_type_metadata.end())
  return &It->second;
return nullptr;
2576}

2578clang::DeclContext *
2579TypeSystemClang::GetDeclContextForType(const CompilerType &type) {
return GetDeclContextForType(ClangUtil::GetQualType(type));
2581}

2583/// Aggressively desugar the provided type, skipping past various kinds of
2584/// syntactic sugar and other constructs one typically wants to ignore.
2585/// The \p mask argument allows one to skip certain kinds of simplifications,
2586/// when one wishes to handle a certain kind of type directly.
2587static QualType
2588RemoveWrappingTypes(QualType type, ArrayRef<clang::Type::TypeClass> mask = {}) {
while (true) {
  if (find(mask, type->getTypeClass()) != mask.end())
    return type;
  switch (type->getTypeClass()) {
  // This is not fully correct as _Atomic is more than sugar, but it is
  // sufficient for the purposes we care about.
  case clang::Type::Atomic:
    type = cast<clang::AtomicType>(type)->getValueType();
    break;
  case clang::Type::Auto:
  case clang::Type::Decltype:
  case clang::Type::Elaborated:
  case clang::Type::Paren:
  case clang::Type::SubstTemplateTypeParm:
  case clang::Type::TemplateSpecialization:
  case clang::Type::Typedef:
  case clang::Type::TypeOf:
  case clang::Type::TypeOfExpr:
    type = type->getLocallyUnqualifiedSingleStepDesugaredType();
    break;
  default:
    return type;
  }
}
2613}

2615clang::DeclContext *
2616TypeSystemClang::GetDeclContextForType(clang::QualType type) {
if (type.isNull())
  return nullptr;

clang::QualType qual_type = RemoveWrappingTypes(type.getCanonicalType());
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::ObjCInterface:
  return llvm::cast<clang::ObjCObjectType>(qual_type.getTypePtr())
      ->getInterface();
case clang::Type::ObjCObjectPointer:
  return GetDeclContextForType(
      llvm::cast<clang::ObjCObjectPointerType>(qual_type.getTypePtr())
          ->getPointeeType());
case clang::Type::Record:
  return llvm::cast<clang::RecordType>(qual_type)->getDecl();
case clang::Type::Enum:
  return llvm::cast<clang::EnumType>(qual_type)->getDecl();
default:
  break;
}
// No DeclContext in this type...
return nullptr;
2639}

2641static bool GetCompleteQualType(clang::ASTContext *ast,
                              clang::QualType qual_type,
                              bool allow_completion = true) {
qual_type = RemoveWrappingTypes(qual_type);
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::ConstantArray:
case clang::Type::IncompleteArray:
case clang::Type::VariableArray: {
  const clang::ArrayType *array_type =
      llvm::dyn_cast<clang::ArrayType>(qual_type.getTypePtr());

  if (array_type)
    return GetCompleteQualType(ast, array_type->getElementType(),
                               allow_completion);
} break;
case clang::Type::Record: {
  clang::CXXRecordDecl *cxx_record_decl = qual_type->getAsCXXRecordDecl();
  if (cxx_record_decl) {
    if (cxx_record_decl->hasExternalLexicalStorage()) {
      const bool is_complete = cxx_record_decl->isCompleteDefinition();
      const bool fields_loaded =
          cxx_record_decl->hasLoadedFieldsFromExternalStorage();
      if (is_complete && fields_loaded)
        return true;

      if (!allow_completion)
        return false;

      // Call the field_begin() accessor to for it to use the external source
      // to load the fields...
      clang::ExternalASTSource *external_ast_source =
          ast->getExternalSource();
      if (external_ast_source) {
        external_ast_source->CompleteType(cxx_record_decl);
        if (cxx_record_decl->isCompleteDefinition()) {
          cxx_record_decl->field_begin();
          cxx_record_decl->setHasLoadedFieldsFromExternalStorage(true);
        }
      }
    }
  }
  const clang::TagType *tag_type =
      llvm::cast<clang::TagType>(qual_type.getTypePtr());
  return !tag_type->isIncompleteType();
} break;

case clang::Type::Enum: {
  const clang::TagType *tag_type =
      llvm::dyn_cast<clang::TagType>(qual_type.getTypePtr());
  if (tag_type) {
    clang::TagDecl *tag_decl = tag_type->getDecl();
    if (tag_decl) {
      if (tag_decl->getDefinition())
        return true;

      if (!allow_completion)
        return false;

      if (tag_decl->hasExternalLexicalStorage()) {
        if (ast) {
          clang::ExternalASTSource *external_ast_source =
              ast->getExternalSource();
          if (external_ast_source) {
            external_ast_source->CompleteType(tag_decl);
            return !tag_type->isIncompleteType();
          }
        }
      }
      return false;
    }
  }

} break;
case clang::Type::ObjCObject:
case clang::Type::ObjCInterface: {
  const clang::ObjCObjectType *objc_class_type =
      llvm::dyn_cast<clang::ObjCObjectType>(qual_type);
  if (objc_class_type) {
    clang::ObjCInterfaceDecl *class_interface_decl =
        objc_class_type->getInterface();
    // We currently can't complete objective C types through the newly added
    // ASTContext because it only supports TagDecl objects right now...
    if (class_interface_decl) {
      if (class_interface_decl->getDefinition())
        return true;

      if (!allow_completion)
        return false;

      if (class_interface_decl->hasExternalLexicalStorage()) {
        if (ast) {
          clang::ExternalASTSource *external_ast_source =
              ast->getExternalSource();
          if (external_ast_source) {
            external_ast_source->CompleteType(class_interface_decl);
            return !objc_class_type->isIncompleteType();
          }
        }
      }
      return false;
    }
  }
} break;

case clang::Type::Attributed:
  return GetCompleteQualType(
      ast, llvm::cast<clang::AttributedType>(qual_type)->getModifiedType(),
      allow_completion);

default:
  break;
}

return true;
2756}

2758static clang::ObjCIvarDecl::AccessControl
2759ConvertAccessTypeToObjCIvarAccessControl(AccessType access) {
switch (access) {
case eAccessNone:
  return clang::ObjCIvarDecl::None;
case eAccessPublic:
  return clang::ObjCIvarDecl::Public;
case eAccessPrivate:
  return clang::ObjCIvarDecl::Private;
case eAccessProtected:
  return clang::ObjCIvarDecl::Protected;
case eAccessPackage:
  return clang::ObjCIvarDecl::Package;
}
return clang::ObjCIvarDecl::None;
2773}

2775// Tests

2777#ifndef NDEBUG1
2778bool TypeSystemClang::Verify(lldb::opaque_compiler_type_t type) {
return !type || llvm::isa<clang::Type>(GetQualType(type).getTypePtr());
2780}
2781#endif

2783bool TypeSystemClang::IsAggregateType(lldb::opaque_compiler_type_t type) {
clang::QualType qual_type(RemoveWrappingTypes(GetCanonicalQualType(type)));

const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::IncompleteArray:
case clang::Type::VariableArray:
case clang::Type::ConstantArray:
case clang::Type::ExtVector:
case clang::Type::Vector:
case clang::Type::Record:
case clang::Type::ObjCObject:
case clang::Type::ObjCInterface:
  return true;
default:
  break;
}
// The clang type does have a value
return false;
2802}

2804bool TypeSystemClang::IsAnonymousType(lldb::opaque_compiler_type_t type) {
clang::QualType qual_type(RemoveWrappingTypes(GetCanonicalQualType(type)));

const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Record: {
  if (const clang::RecordType *record_type =
          llvm::dyn_cast_or_null<clang::RecordType>(
              qual_type.getTypePtrOrNull())) {
    if (const clang::RecordDecl *record_decl = record_type->getDecl()) {
      return record_decl->isAnonymousStructOrUnion();
    }
  }
  break;
}
default:
  break;
}
// The clang type does have a value
return false;
2824}

2826bool TypeSystemClang::IsArrayType(lldb::opaque_compiler_type_t type,
                                CompilerType *element_type_ptr,
                                uint64_t *size, bool *is_incomplete) {
clang::QualType qual_type(RemoveWrappingTypes(GetCanonicalQualType(type)));

const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
default:
  break;

case clang::Type::ConstantArray:
  if (element_type_ptr)
    element_type_ptr->SetCompilerType(
        this, llvm::cast<clang::ConstantArrayType>(qual_type)
                  ->getElementType()
                  .getAsOpaquePtr());
  if (size)
    *size = llvm::cast<clang::ConstantArrayType>(qual_type)
                ->getSize()
                .getLimitedValue(ULLONG_MAX(9223372036854775807LL*2ULL+1ULL));
  if (is_incomplete)
    *is_incomplete = false;
  return true;

case clang::Type::IncompleteArray:
  if (element_type_ptr)
    element_type_ptr->SetCompilerType(
        this, llvm::cast<clang::IncompleteArrayType>(qual_type)
                  ->getElementType()
                  .getAsOpaquePtr());
  if (size)
    *size = 0;
  if (is_incomplete)
    *is_incomplete = true;
  return true;

case clang::Type::VariableArray:
  if (element_type_ptr)
    element_type_ptr->SetCompilerType(
        this, llvm::cast<clang::VariableArrayType>(qual_type)
                  ->getElementType()
                  .getAsOpaquePtr());
  if (size)
    *size = 0;
  if (is_incomplete)
    *is_incomplete = false;
  return true;

case clang::Type::DependentSizedArray:
  if (element_type_ptr)
    element_type_ptr->SetCompilerType(
        this, llvm::cast<clang::DependentSizedArrayType>(qual_type)
                  ->getElementType()
                  .getAsOpaquePtr());
  if (size)
    *size = 0;
  if (is_incomplete)
    *is_incomplete = false;
  return true;
}
if (element_type_ptr)
  element_type_ptr->Clear();
if (size)
  *size = 0;
if (is_incomplete)
  *is_incomplete = false;
return false;
2893}

2895bool TypeSystemClang::IsVectorType(lldb::opaque_compiler_type_t type,
                                 CompilerType *element_type, uint64_t *size) {
clang::QualType qual_type(GetCanonicalQualType(type));

const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Vector: {
  const clang::VectorType *vector_type =
      qual_type->getAs<clang::VectorType>();
  if (vector_type) {
    if (size)
      *size = vector_type->getNumElements();
    if (element_type)
      *element_type = GetType(vector_type->getElementType());
  }
  return true;
} break;
case clang::Type::ExtVector: {
  const clang::ExtVectorType *ext_vector_type =
      qual_type->getAs<clang::ExtVectorType>();
  if (ext_vector_type) {
    if (size)
      *size = ext_vector_type->getNumElements();
    if (element_type)
      *element_type =
          CompilerType(this, ext_vector_type->getElementType().getAsOpaquePtr());
  }
  return true;
}
default:
  break;
}
return false;
2928}

2930bool TypeSystemClang::IsRuntimeGeneratedType(
  lldb::opaque_compiler_type_t type) {
clang::DeclContext *decl_ctx = GetDeclContextForType(GetQualType(type));
if (!decl_ctx)
  return false;

if (!llvm::isa<clang::ObjCInterfaceDecl>(decl_ctx))
  return false;

clang::ObjCInterfaceDecl *result_iface_decl =
    llvm::dyn_cast<clang::ObjCInterfaceDecl>(decl_ctx);

ClangASTMetadata *ast_metadata = GetMetadata(result_iface_decl);
if (!ast_metadata)
  return false;
return (ast_metadata->GetISAPtr() != 0);
2946}

2948bool TypeSystemClang::IsCharType(lldb::opaque_compiler_type_t type) {
return GetQualType(type).getUnqualifiedType()->isCharType();
2950}

2952bool TypeSystemClang::IsCompleteType(lldb::opaque_compiler_type_t type) {
const bool allow_completion = false;
return GetCompleteQualType(&getASTContext(), GetQualType(type),
                           allow_completion);
2956}

2958bool TypeSystemClang::IsConst(lldb::opaque_compiler_type_t type) {
return GetQualType(type).isConstQualified();
2960}

2962bool TypeSystemClang::IsCStringType(lldb::opaque_compiler_type_t type,
                                  uint32_t &length) {
CompilerType pointee_or_element_clang_type;
length = 0;
Flags type_flags(GetTypeInfo(type, &pointee_or_element_clang_type));

if (!pointee_or_element_clang_type.IsValid())
  return false;

if (type_flags.AnySet(eTypeIsArray | eTypeIsPointer)) {
  if (pointee_or_element_clang_type.IsCharType()) {
    if (type_flags.Test(eTypeIsArray)) {
      // We know the size of the array and it could be a C string since it is
      // an array of characters
      length = llvm::cast<clang::ConstantArrayType>(
                   GetCanonicalQualType(type).getTypePtr())
                   ->getSize()
                   .getLimitedValue();
    }
    return true;
  }
}
return false;
2985}

2987bool TypeSystemClang::IsFunctionType(lldb::opaque_compiler_type_t type) {
if (type) {
  clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));

  if (qual_type->isFunctionType()) {
    return true;
  }

  const clang::Type::TypeClass type_class = qual_type->getTypeClass();
  switch (type_class) {
  default:
    break;
  case clang::Type::LValueReference:
  case clang::Type::RValueReference: {
    const clang::ReferenceType *reference_type =
        llvm::cast<clang::ReferenceType>(qual_type.getTypePtr());
    if (reference_type)
      return IsFunctionType(
          reference_type->getPointeeType().getAsOpaquePtr());
  } break;
  }
}
return false;
3010}

3012// Used to detect "Homogeneous Floating-point Aggregates"
3013uint32_t
3014TypeSystemClang::IsHomogeneousAggregate(lldb::opaque_compiler_type_t type,
                                      CompilerType *base_type_ptr) {
if (!type)
  return 0;

clang::QualType qual_type(RemoveWrappingTypes(GetCanonicalQualType(type)));
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Record:
  if (GetCompleteType(type)) {
    const clang::CXXRecordDecl *cxx_record_decl =
        qual_type->getAsCXXRecordDecl();
    if (cxx_record_decl) {
      if (cxx_record_decl->getNumBases() || cxx_record_decl->isDynamicClass())
        return 0;
    }
    const clang::RecordType *record_type =
        llvm::cast<clang::RecordType>(qual_type.getTypePtr());
    if (record_type) {
      const clang::RecordDecl *record_decl = record_type->getDecl();
      if (record_decl) {
        // We are looking for a structure that contains only floating point
        // types
        clang::RecordDecl::field_iterator field_pos,
            field_end = record_decl->field_end();
        uint32_t num_fields = 0;
        bool is_hva = false;
        bool is_hfa = false;
        clang::QualType base_qual_type;
        uint64_t base_bitwidth = 0;
        for (field_pos = record_decl->field_begin(); field_pos != field_end;
             ++field_pos) {
          clang::QualType field_qual_type = field_pos->getType();
          uint64_t field_bitwidth = getASTContext().getTypeSize(qual_type);
          if (field_qual_type->isFloatingType()) {
            if (field_qual_type->isComplexType())
              return 0;
            else {
              if (num_fields == 0)
                base_qual_type = field_qual_type;
              else {
                if (is_hva)
                  return 0;
                is_hfa = true;
                if (field_qual_type.getTypePtr() !=
                    base_qual_type.getTypePtr())
                  return 0;
              }
            }
          } else if (field_qual_type->isVectorType() ||
                     field_qual_type->isExtVectorType()) {
            if (num_fields == 0) {
              base_qual_type = field_qual_type;
              base_bitwidth = field_bitwidth;
            } else {
              if (is_hfa)
                return 0;
              is_hva = true;
              if (base_bitwidth != field_bitwidth)
                return 0;
              if (field_qual_type.getTypePtr() != base_qual_type.getTypePtr())
                return 0;
            }
          } else
            return 0;
          ++num_fields;
        }
        if (base_type_ptr)
          *base_type_ptr = CompilerType(this, base_qual_type.getAsOpaquePtr());
        return num_fields;
      }
    }
  }
  break;

default:
  break;
}
return 0;
3093}

3095size_t TypeSystemClang::GetNumberOfFunctionArguments(
  lldb::opaque_compiler_type_t type) {
if (type) {
  clang::QualType qual_type(GetCanonicalQualType(type));
  const clang::FunctionProtoType *func =
      llvm::dyn_cast<clang::FunctionProtoType>(qual_type.getTypePtr());
  if (func)
    return func->getNumParams();
}
return 0;
3105}

3107CompilerType
3108TypeSystemClang::GetFunctionArgumentAtIndex(lldb::opaque_compiler_type_t type,
                                          const size_t index) {
if (type) {
  clang::QualType qual_type(GetQualType(type));
  const clang::FunctionProtoType *func =
      llvm::dyn_cast<clang::FunctionProtoType>(qual_type.getTypePtr());
  if (func) {
    if (index < func->getNumParams())
      return CompilerType(this, func->getParamType(index).getAsOpaquePtr());
  }
}
return CompilerType();
3120}

3122bool TypeSystemClang::IsFunctionPointerType(lldb::opaque_compiler_type_t type) {
if (type) {
  clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));

  if (qual_type->isFunctionPointerType())
    return true;

  const clang::Type::TypeClass type_class = qual_type->getTypeClass();
  switch (type_class) {
  default:
    break;

  case clang::Type::LValueReference:
  case clang::Type::RValueReference: {
    const clang::ReferenceType *reference_type =
        llvm::cast<clang::ReferenceType>(qual_type.getTypePtr());
    if (reference_type)
      return IsFunctionPointerType(
          reference_type->getPointeeType().getAsOpaquePtr());
  } break;
  }
}
return false;
3145}

3147bool TypeSystemClang::IsBlockPointerType(
  lldb::opaque_compiler_type_t type,
  CompilerType *function_pointer_type_ptr) {
if (type) {
  clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));

  if (qual_type->isBlockPointerType()) {
    if (function_pointer_type_ptr) {
      const clang::BlockPointerType *block_pointer_type =
          qual_type->getAs<clang::BlockPointerType>();
      QualType pointee_type = block_pointer_type->getPointeeType();
      QualType function_pointer_type = m_ast_up->getPointerType(pointee_type);
      *function_pointer_type_ptr =
          CompilerType(this, function_pointer_type.getAsOpaquePtr());
    }
    return true;
  }

  const clang::Type::TypeClass type_class = qual_type->getTypeClass();
  switch (type_class) {
  default:
    break;

  case clang::Type::LValueReference:
  case clang::Type::RValueReference: {
    const clang::ReferenceType *reference_type =
        llvm::cast<clang::ReferenceType>(qual_type.getTypePtr());
    if (reference_type)
      return IsBlockPointerType(
          reference_type->getPointeeType().getAsOpaquePtr(),
          function_pointer_type_ptr);
  } break;
  }
}
return false;
3182}

3184bool TypeSystemClang::IsIntegerType(lldb::opaque_compiler_type_t type,
                                  bool &is_signed) {
if (!type)
  return false;

clang::QualType qual_type(GetCanonicalQualType(type));
const clang::BuiltinType *builtin_type =
    llvm::dyn_cast<clang::BuiltinType>(qual_type->getCanonicalTypeInternal());

if (builtin_type) {
  if (builtin_type->isInteger()) {
    is_signed = builtin_type->isSignedInteger();
    return true;
  }
}

return false;
3201}

3203bool TypeSystemClang::IsEnumerationType(lldb::opaque_compiler_type_t type,
                                      bool &is_signed) {
if (type) {
  const clang::EnumType *enum_type = llvm::dyn_cast<clang::EnumType>(
      GetCanonicalQualType(type)->getCanonicalTypeInternal());

  if (enum_type) {
    IsIntegerType(enum_type->getDecl()->getIntegerType().getAsOpaquePtr(),
                  is_signed);
    return true;
  }
}

return false;
3217}

3219bool TypeSystemClang::IsScopedEnumerationType(
  lldb::opaque_compiler_type_t type) {
if (type) {
  const clang::EnumType *enum_type = llvm::dyn_cast<clang::EnumType>(
      GetCanonicalQualType(type)->getCanonicalTypeInternal());

  if (enum_type) {
    return enum_type->isScopedEnumeralType();
  }
}

return false;
3231}

3233bool TypeSystemClang::IsPointerType(lldb::opaque_compiler_type_t type,
                                  CompilerType *pointee_type) {
if (type) {
  clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));
  const clang::Type::TypeClass type_class = qual_type->getTypeClass();
  switch (type_class) {
  case clang::Type::Builtin:
    switch (llvm::cast<clang::BuiltinType>(qual_type)->getKind()) {
    default:
      break;
    case clang::BuiltinType::ObjCId:
    case clang::BuiltinType::ObjCClass:
      return true;
    }
    return false;
  case clang::Type::ObjCObjectPointer:
    if (pointee_type)
      pointee_type->SetCompilerType(
          this, llvm::cast<clang::ObjCObjectPointerType>(qual_type)
                    ->getPointeeType()
                    .getAsOpaquePtr());
    return true;
  case clang::Type::BlockPointer:
    if (pointee_type)
      pointee_type->SetCompilerType(
          this, llvm::cast<clang::BlockPointerType>(qual_type)
                    ->getPointeeType()
                    .getAsOpaquePtr());
    return true;
  case clang::Type::Pointer:
    if (pointee_type)
      pointee_type->SetCompilerType(this,
                                    llvm::cast<clang::PointerType>(qual_type)
                                        ->getPointeeType()
                                        .getAsOpaquePtr());
    return true;
  case clang::Type::MemberPointer:
    if (pointee_type)
      pointee_type->SetCompilerType(
          this, llvm::cast<clang::MemberPointerType>(qual_type)
                    ->getPointeeType()
                    .getAsOpaquePtr());
    return true;
  default:
    break;
  }
}
if (pointee_type)
  pointee_type->Clear();
return false;
3283}

3285bool TypeSystemClang::IsPointerOrReferenceType(
  lldb::opaque_compiler_type_t type, CompilerType *pointee_type) {
if (type) {
  clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));
  const clang::Type::TypeClass type_class = qual_type->getTypeClass();
  switch (type_class) {
  case clang::Type::Builtin:
    switch (llvm::cast<clang::BuiltinType>(qual_type)->getKind()) {
    default:
      break;
    case clang::BuiltinType::ObjCId:
    case clang::BuiltinType::ObjCClass:
      return true;
    }
    return false;
  case clang::Type::ObjCObjectPointer:
    if (pointee_type)
      pointee_type->SetCompilerType(
          this, llvm::cast<clang::ObjCObjectPointerType>(qual_type)
                               ->getPointeeType().getAsOpaquePtr());
    return true;
  case clang::Type::BlockPointer:
    if (pointee_type)
      pointee_type->SetCompilerType(
          this, llvm::cast<clang::BlockPointerType>(qual_type)
                    ->getPointeeType()
                    .getAsOpaquePtr());
    return true;
  case clang::Type::Pointer:
    if (pointee_type)
      pointee_type->SetCompilerType(this,
                                    llvm::cast<clang::PointerType>(qual_type)
                                        ->getPointeeType()
                                        .getAsOpaquePtr());
    return true;
  case clang::Type::MemberPointer:
    if (pointee_type)
      pointee_type->SetCompilerType(
          this, llvm::cast<clang::MemberPointerType>(qual_type)
                    ->getPointeeType()
                    .getAsOpaquePtr());
    return true;
  case clang::Type::LValueReference:
    if (pointee_type)
      pointee_type->SetCompilerType(
          this, llvm::cast<clang::LValueReferenceType>(qual_type)
                    ->desugar()
                    .getAsOpaquePtr());
    return true;
  case clang::Type::RValueReference:
    if (pointee_type)
      pointee_type->SetCompilerType(
          this, llvm::cast<clang::RValueReferenceType>(qual_type)
                    ->desugar()
                    .getAsOpaquePtr());
    return true;
  default:
    break;
  }
}
if (pointee_type)
  pointee_type->Clear();
return false;
3348}

3350bool TypeSystemClang::IsReferenceType(lldb::opaque_compiler_type_t type,
                                    CompilerType *pointee_type,
                                    bool *is_rvalue) {
if (type) {
  clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));
  const clang::Type::TypeClass type_class = qual_type->getTypeClass();

  switch (type_class) {
  case clang::Type::LValueReference:
    if (pointee_type)
      pointee_type->SetCompilerType(
          this, llvm::cast<clang::LValueReferenceType>(qual_type)
                    ->desugar()
                    .getAsOpaquePtr());
    if (is_rvalue)
      *is_rvalue = false;
    return true;
  case clang::Type::RValueReference:
    if (pointee_type)
      pointee_type->SetCompilerType(
          this, llvm::cast<clang::RValueReferenceType>(qual_type)
                    ->desugar()
                    .getAsOpaquePtr());
    if (is_rvalue)
      *is_rvalue = true;
    return true;

  default:
    break;
  }
}
if (pointee_type)
  pointee_type->Clear();
return false;
3384}

3386bool TypeSystemClang::IsFloatingPointType(lldb::opaque_compiler_type_t type,
                                        uint32_t &count, bool &is_complex) {
if (type) {
  clang::QualType qual_type(GetCanonicalQualType(type));

  if (const clang::BuiltinType *BT = llvm::dyn_cast<clang::BuiltinType>(
          qual_type->getCanonicalTypeInternal())) {
    clang::BuiltinType::Kind kind = BT->getKind();
    if (kind >= clang::BuiltinType::Float &&
        kind <= clang::BuiltinType::LongDouble) {
      count = 1;
      is_complex = false;
      return true;
    }
  } else if (const clang::ComplexType *CT =
                 llvm::dyn_cast<clang::ComplexType>(
                     qual_type->getCanonicalTypeInternal())) {
    if (IsFloatingPointType(CT->getElementType().getAsOpaquePtr(), count,
                            is_complex)) {
      count = 2;
      is_complex = true;
      return true;
    }
  } else if (const clang::VectorType *VT = llvm::dyn_cast<clang::VectorType>(
                 qual_type->getCanonicalTypeInternal())) {
    if (IsFloatingPointType(VT->getElementType().getAsOpaquePtr(), count,
                            is_complex)) {
      count = VT->getNumElements();
      is_complex = false;
      return true;
    }
  }
}
count = 0;
is_complex = false;
return false;
3422}

3424bool TypeSystemClang::IsDefined(lldb::opaque_compiler_type_t type) {
if (!type)
  return false;

clang::QualType qual_type(GetQualType(type));
const clang::TagType *tag_type =
    llvm::dyn_cast<clang::TagType>(qual_type.getTypePtr());
if (tag_type) {
  clang::TagDecl *tag_decl = tag_type->getDecl();
  if (tag_decl)
    return tag_decl->isCompleteDefinition();
  return false;
} else {
  const clang::ObjCObjectType *objc_class_type =
      llvm::dyn_cast<clang::ObjCObjectType>(qual_type);
  if (objc_class_type) {
    clang::ObjCInterfaceDecl *class_interface_decl =
        objc_class_type->getInterface();
    if (class_interface_decl)
      return class_interface_decl->getDefinition() != nullptr;
    return false;
  }
}
return true;
3448}

3450bool TypeSystemClang::IsObjCClassType(const CompilerType &type) {
if (ClangUtil::IsClangType(type)) {
  clang::QualType qual_type(ClangUtil::GetCanonicalQualType(type));

  const clang::ObjCObjectPointerType *obj_pointer_type =
      llvm::dyn_cast<clang::ObjCObjectPointerType>(qual_type);

  if (obj_pointer_type)
    return obj_pointer_type->isObjCClassType();
}
return false;
3461}

3463bool TypeSystemClang::IsObjCObjectOrInterfaceType(const CompilerType &type) {
if (ClangUtil::IsClangType(type))
  return ClangUtil::GetCanonicalQualType(type)->isObjCObjectOrInterfaceType();
return false;
3467}

3469bool TypeSystemClang::IsClassType(lldb::opaque_compiler_type_t type) {
if (!type)
  return false;
clang::QualType qual_type(GetCanonicalQualType(type));
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
return (type_class == clang::Type::Record);
3475}

3477bool TypeSystemClang::IsEnumType(lldb::opaque_compiler_type_t type) {
if (!type)
  return false;
clang::QualType qual_type(GetCanonicalQualType(type));
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
return (type_class == clang::Type::Enum);
3483}

3485bool TypeSystemClang::IsPolymorphicClass(lldb::opaque_compiler_type_t type) {
if (type) {
  clang::QualType qual_type(GetCanonicalQualType(type));
  const clang::Type::TypeClass type_class = qual_type->getTypeClass();
  switch (type_class) {
  case clang::Type::Record:
    if (GetCompleteType(type)) {
      const clang::RecordType *record_type =
          llvm::cast<clang::RecordType>(qual_type.getTypePtr());
      const clang::RecordDecl *record_decl = record_type->getDecl();
      if (record_decl) {
        const clang::CXXRecordDecl *cxx_record_decl =
            llvm::dyn_cast<clang::CXXRecordDecl>(record_decl);
        if (cxx_record_decl)
          return cxx_record_decl->isPolymorphic();
      }
    }
    break;

  default:
    break;
  }
}
return false;
3509}

3511bool TypeSystemClang::IsPossibleDynamicType(lldb::opaque_compiler_type_t type,
                                          CompilerType *dynamic_pointee_type,
                                          bool check_cplusplus,
                                          bool check_objc) {
clang::QualType pointee_qual_type;
if (type) {
  clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));
  bool success = false;
  const clang::Type::TypeClass type_class = qual_type->getTypeClass();
  switch (type_class) {
  case clang::Type::Builtin:
    if (check_objc &&
        llvm::cast<clang::BuiltinType>(qual_type)->getKind() ==
            clang::BuiltinType::ObjCId) {
      if (dynamic_pointee_type)
        dynamic_pointee_type->SetCompilerType(this, type);
      return true;
    }
    break;

  case clang::Type::ObjCObjectPointer:
    if (check_objc) {
      if (const auto *objc_pointee_type =
              qual_type->getPointeeType().getTypePtrOrNull()) {
        if (const auto *objc_object_type =
                llvm::dyn_cast_or_null<clang::ObjCObjectType>(
                    objc_pointee_type)) {
          if (objc_object_type->isObjCClass())
            return false;
        }
      }
      if (dynamic_pointee_type)
        dynamic_pointee_type->SetCompilerType(
            this, llvm::cast<clang::ObjCObjectPointerType>(qual_type)
                      ->getPointeeType()
                      .getAsOpaquePtr());
      return true;
    }
    break;

  case clang::Type::Pointer:
    pointee_qual_type =
        llvm::cast<clang::PointerType>(qual_type)->getPointeeType();
    success = true;
    break;

  case clang::Type::LValueReference:
  case clang::Type::RValueReference:
    pointee_qual_type =
        llvm::cast<clang::ReferenceType>(qual_type)->getPointeeType();
    success = true;
    break;

  default:
    break;
  }

  if (success) {
    // Check to make sure what we are pointing too is a possible dynamic C++
    // type We currently accept any "void *" (in case we have a class that
    // has been watered down to an opaque pointer) and virtual C++ classes.
    const clang::Type::TypeClass pointee_type_class =
        pointee_qual_type.getCanonicalType()->getTypeClass();
    switch (pointee_type_class) {
    case clang::Type::Builtin:
      switch (llvm::cast<clang::BuiltinType>(pointee_qual_type)->getKind()) {
      case clang::BuiltinType::UnknownAny:
      case clang::BuiltinType::Void:
        if (dynamic_pointee_type)
          dynamic_pointee_type->SetCompilerType(
              this, pointee_qual_type.getAsOpaquePtr());
        return true;
      default:
        break;
      }
      break;

    case clang::Type::Record:
      if (check_cplusplus) {
        clang::CXXRecordDecl *cxx_record_decl =
            pointee_qual_type->getAsCXXRecordDecl();
        if (cxx_record_decl) {
          bool is_complete = cxx_record_decl->isCompleteDefinition();

          if (is_complete)
            success = cxx_record_decl->isDynamicClass();
          else {
            ClangASTMetadata *metadata = GetMetadata(cxx_record_decl);
            if (metadata)
              success = metadata->GetIsDynamicCXXType();
            else {
              is_complete = GetType(pointee_qual_type).GetCompleteType();
              if (is_complete)
                success = cxx_record_decl->isDynamicClass();
              else
                success = false;
            }
          }

          if (success) {
            if (dynamic_pointee_type)
              dynamic_pointee_type->SetCompilerType(
                  this, pointee_qual_type.getAsOpaquePtr());
            return true;
          }
        }
      }
      break;

    case clang::Type::ObjCObject:
    case clang::Type::ObjCInterface:
      if (check_objc) {
        if (dynamic_pointee_type)
          dynamic_pointee_type->SetCompilerType(
              this, pointee_qual_type.getAsOpaquePtr());
        return true;
      }
      break;

    default:
      break;
    }
  }
}
if (dynamic_pointee_type)
  dynamic_pointee_type->Clear();
return false;
3638}

3640bool TypeSystemClang::IsScalarType(lldb::opaque_compiler_type_t type) {
if (!type)
  return false;

return (GetTypeInfo(type, nullptr) & eTypeIsScalar) != 0;
3645}

3647bool TypeSystemClang::IsTypedefType(lldb::opaque_compiler_type_t type) {
if (!type)
  return false;
return RemoveWrappingTypes(GetQualType(type), {clang::Type::Typedef})
           ->getTypeClass() == clang::Type::Typedef;
3652}

3654bool TypeSystemClang::IsVoidType(lldb::opaque_compiler_type_t type) {
if (!type)
  return false;
return GetCanonicalQualType(type)->isVoidType();
3658}

3660bool TypeSystemClang::CanPassInRegisters(const CompilerType &type) {
if (auto *record_decl =
    TypeSystemClang::GetAsRecordDecl(type)) {
  return record_decl->canPassInRegisters();
}
return false;
3666}

3668bool TypeSystemClang::SupportsLanguage(lldb::LanguageType language) {
return TypeSystemClangSupportsLanguage(language);
3670}

3672Optional<std::string>
3673TypeSystemClang::GetCXXClassName(const CompilerType &type) {
if (!type)
  return llvm::None;

clang::QualType qual_type(ClangUtil::GetCanonicalQualType(type));
if (qual_type.isNull())
  return llvm::None;

clang::CXXRecordDecl *cxx_record_decl = qual_type->getAsCXXRecordDecl();
if (!cxx_record_decl)
  return llvm::None;

return std::string(cxx_record_decl->getIdentifier()->getNameStart());
3686}

3688bool TypeSystemClang::IsCXXClassType(const CompilerType &type) {
if (!type)
  return false;

clang::QualType qual_type(ClangUtil::GetCanonicalQualType(type));
return !qual_type.isNull() && qual_type->getAsCXXRecordDecl() != nullptr;
3694}

3696bool TypeSystemClang::IsBeingDefined(lldb::opaque_compiler_type_t type) {
if (!type)
  return false;
clang::QualType qual_type(GetCanonicalQualType(type));
const clang::TagType *tag_type = llvm::dyn_cast<clang::TagType>(qual_type);
if (tag_type)
  return tag_type->isBeingDefined();
return false;
3704}

3706bool TypeSystemClang::IsObjCObjectPointerType(const CompilerType &type,
                                            CompilerType *class_type_ptr) {
if (!ClangUtil::IsClangType(type))
  return false;

clang::QualType qual_type(ClangUtil::GetCanonicalQualType(type));

if (!qual_type.isNull() && qual_type->isObjCObjectPointerType()) {
  if (class_type_ptr) {
    if (!qual_type->isObjCClassType() && !qual_type->isObjCIdType()) {
      const clang::ObjCObjectPointerType *obj_pointer_type =
          llvm::dyn_cast<clang::ObjCObjectPointerType>(qual_type);
      if (obj_pointer_type == nullptr)
        class_type_ptr->Clear();
      else
        class_type_ptr->SetCompilerType(
            type.GetTypeSystem(),
            clang::QualType(obj_pointer_type->getInterfaceType(), 0)
                .getAsOpaquePtr());
    }
  }
  return true;
}
if (class_type_ptr)
  class_type_ptr->Clear();
return false;
3732}

3734// Type Completion

3736bool TypeSystemClang::GetCompleteType(lldb::opaque_compiler_type_t type) {
if (!type)
  return false;
const bool allow_completion = true;
return GetCompleteQualType(&getASTContext(), GetQualType(type),
                           allow_completion);
3742}

3744ConstString TypeSystemClang::GetTypeName(lldb::opaque_compiler_type_t type) {
if (!type)
  return ConstString();

clang::QualType qual_type(GetQualType(type));

// Remove certain type sugar from the name. Sugar such as elaborated types
// or template types which only serve to improve diagnostics shouldn't
// act as their own types from the user's perspective (e.g., formatter
// shouldn't format a variable differently depending on how the ser has
// specified the type. '::Type' and 'Type' should behave the same).
// Typedefs and atomic derived types are not removed as they are actually
// useful for identifiying specific types.
qual_type = RemoveWrappingTypes(qual_type,
                                {clang::Type::Typedef, clang::Type::Atomic});

// For a typedef just return the qualified name.
if (const auto *typedef_type = qual_type->getAs<clang::TypedefType>()) {
  const clang::TypedefNameDecl *typedef_decl = typedef_type->getDecl();
  return ConstString(GetTypeNameForDecl(typedef_decl));
}

return ConstString(qual_type.getAsString(GetTypePrintingPolicy()));
3767}

3769ConstString
3770TypeSystemClang::GetDisplayTypeName(lldb::opaque_compiler_type_t type) {
if (!type)
  return ConstString();

clang::QualType qual_type(GetQualType(type));
clang::PrintingPolicy printing_policy(getASTContext().getPrintingPolicy());
printing_policy.SuppressTagKeyword = true;
printing_policy.SuppressScope = false;
printing_policy.SuppressUnwrittenScope = true;
printing_policy.SuppressInlineNamespace = true;
return ConstString(qual_type.getAsString(printing_policy));
3781}

3783uint32_t
3784TypeSystemClang::GetTypeInfo(lldb::opaque_compiler_type_t type,
                           CompilerType *pointee_or_element_clang_type) {
if (!type)
  return 0;

if (pointee_or_element_clang_type)
  pointee_or_element_clang_type->Clear();

clang::QualType qual_type =
    RemoveWrappingTypes(GetQualType(type), {clang::Type::Typedef});

const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Attributed:
  return GetTypeInfo(
      qual_type->getAs<clang::AttributedType>()
          ->getModifiedType().getAsOpaquePtr(),
      pointee_or_element_clang_type);
case clang::Type::Builtin: {
  const clang::BuiltinType *builtin_type = llvm::dyn_cast<clang::BuiltinType>(
      qual_type->getCanonicalTypeInternal());

  uint32_t builtin_type_flags = eTypeIsBuiltIn | eTypeHasValue;
  switch (builtin_type->getKind()) {
  case clang::BuiltinType::ObjCId:
  case clang::BuiltinType::ObjCClass:
    if (pointee_or_element_clang_type)
      pointee_or_element_clang_type->SetCompilerType(
          this, getASTContext().ObjCBuiltinClassTy.getAsOpaquePtr());
    builtin_type_flags |= eTypeIsPointer | eTypeIsObjC;
    break;

  case clang::BuiltinType::ObjCSel:
    if (pointee_or_element_clang_type)
      pointee_or_element_clang_type->SetCompilerType(
          this, getASTContext().CharTy.getAsOpaquePtr());
    builtin_type_flags |= eTypeIsPointer | eTypeIsObjC;
    break;

  case clang::BuiltinType::Bool:
  case clang::BuiltinType::Char_U:
  case clang::BuiltinType::UChar:
  case clang::BuiltinType::WChar_U:
  case clang::BuiltinType::Char16:
  case clang::BuiltinType::Char32:
  case clang::BuiltinType::UShort:
  case clang::BuiltinType::UInt:
  case clang::BuiltinType::ULong:
  case clang::BuiltinType::ULongLong:
  case clang::BuiltinType::UInt128:
  case clang::BuiltinType::Char_S:
  case clang::BuiltinType::SChar:
  case clang::BuiltinType::WChar_S:
  case clang::BuiltinType::Short:
  case clang::BuiltinType::Int:
  case clang::BuiltinType::Long:
  case clang::BuiltinType::LongLong:
  case clang::BuiltinType::Int128:
  case clang::BuiltinType::Float:
  case clang::BuiltinType::Double:
  case clang::BuiltinType::LongDouble:
    builtin_type_flags |= eTypeIsScalar;
    if (builtin_type->isInteger()) {
      builtin_type_flags |= eTypeIsInteger;
      if (builtin_type->isSignedInteger())
        builtin_type_flags |= eTypeIsSigned;
    } else if (builtin_type->isFloatingPoint())
      builtin_type_flags |= eTypeIsFloat;
    break;
  default:
    break;
  }
  return builtin_type_flags;
}

case clang::Type::BlockPointer:
  if (pointee_or_element_clang_type)
    pointee_or_element_clang_type->SetCompilerType(
        this, qual_type->getPointeeType().getAsOpaquePtr());
  return eTypeIsPointer | eTypeHasChildren | eTypeIsBlock;

case clang::Type::Complex: {
  uint32_t complex_type_flags =
      eTypeIsBuiltIn | eTypeHasValue | eTypeIsComplex;
  const clang::ComplexType *complex_type = llvm::dyn_cast<clang::ComplexType>(
      qual_type->getCanonicalTypeInternal());
  if (complex_type) {
    clang::QualType complex_element_type(complex_type->getElementType());
    if (complex_element_type->isIntegerType())
      complex_type_flags |= eTypeIsFloat;
    else if (complex_element_type->isFloatingType())
      complex_type_flags |= eTypeIsInteger;
  }
  return complex_type_flags;
} break;

case clang::Type::ConstantArray:
case clang::Type::DependentSizedArray:
case clang::Type::IncompleteArray:
case clang::Type::VariableArray:
  if (pointee_or_element_clang_type)
    pointee_or_element_clang_type->SetCompilerType(
        this, llvm::cast<clang::ArrayType>(qual_type.getTypePtr())
                  ->getElementType()
                  .getAsOpaquePtr());
  return eTypeHasChildren | eTypeIsArray;

case clang::Type::DependentName:
  return 0;
case clang::Type::DependentSizedExtVector:
  return eTypeHasChildren | eTypeIsVector;
case clang::Type::DependentTemplateSpecialization:
  return eTypeIsTemplate;

case clang::Type::Enum:
  if (pointee_or_element_clang_type)
    pointee_or_element_clang_type->SetCompilerType(
        this, llvm::cast<clang::EnumType>(qual_type)
                  ->getDecl()
                  ->getIntegerType()
                  .getAsOpaquePtr());
  return eTypeIsEnumeration | eTypeHasValue;

case clang::Type::FunctionProto:
  return eTypeIsFuncPrototype | eTypeHasValue;
case clang::Type::FunctionNoProto:
  return eTypeIsFuncPrototype | eTypeHasValue;
case clang::Type::InjectedClassName:
  return 0;

case clang::Type::LValueReference:
case clang::Type::RValueReference:
  if (pointee_or_element_clang_type)
    pointee_or_element_clang_type->SetCompilerType(
        this, llvm::cast<clang::ReferenceType>(qual_type.getTypePtr())
                  ->getPointeeType()
                  .getAsOpaquePtr());
  return eTypeHasChildren | eTypeIsReference | eTypeHasValue;

case clang::Type::MemberPointer:
  return eTypeIsPointer | eTypeIsMember | eTypeHasValue;

case clang::Type::ObjCObjectPointer:
  if (pointee_or_element_clang_type)
    pointee_or_element_clang_type->SetCompilerType(
        this, qual_type->getPointeeType().getAsOpaquePtr());
  return eTypeHasChildren | eTypeIsObjC | eTypeIsClass | eTypeIsPointer |
         eTypeHasValue;

case clang::Type::ObjCObject:
  return eTypeHasChildren | eTypeIsObjC | eTypeIsClass;
case clang::Type::ObjCInterface:
  return eTypeHasChildren | eTypeIsObjC | eTypeIsClass;

case clang::Type::Pointer:
  if (pointee_or_element_clang_type)
    pointee_or_element_clang_type->SetCompilerType(
        this, qual_type->getPointeeType().getAsOpaquePtr());
  return eTypeHasChildren | eTypeIsPointer | eTypeHasValue;

case clang::Type::Record:
  if (qual_type->getAsCXXRecordDecl())
    return eTypeHasChildren | eTypeIsClass | eTypeIsCPlusPlus;
  else
    return eTypeHasChildren | eTypeIsStructUnion;
  break;
case clang::Type::SubstTemplateTypeParm:
  return eTypeIsTemplate;
case clang::Type::TemplateTypeParm:
  return eTypeIsTemplate;
case clang::Type::TemplateSpecialization:
  return eTypeIsTemplate;

case clang::Type::Typedef:
  return eTypeIsTypedef | GetType(llvm::cast<clang::TypedefType>(qual_type)
                                      ->getDecl()
                                      ->getUnderlyingType())
                              .GetTypeInfo(pointee_or_element_clang_type);
case clang::Type::UnresolvedUsing:
  return 0;

case clang::Type::ExtVector:
case clang::Type::Vector: {
  uint32_t vector_type_flags = eTypeHasChildren | eTypeIsVector;
  const clang::VectorType *vector_type = llvm::dyn_cast<clang::VectorType>(
      qual_type->getCanonicalTypeInternal());
  if (vector_type) {
    if (vector_type->isIntegerType())
      vector_type_flags |= eTypeIsFloat;
    else if (vector_type->isFloatingType())
      vector_type_flags |= eTypeIsInteger;
  }
  return vector_type_flags;
}
default:
  return 0;
}
return 0;
3982}

3984lldb::LanguageType
3985TypeSystemClang::GetMinimumLanguage(lldb::opaque_compiler_type_t type) {
if (!type)
  return lldb::eLanguageTypeC;

// If the type is a reference, then resolve it to what it refers to first:
clang::QualType qual_type(GetCanonicalQualType(type).getNonReferenceType());
if (qual_type->isAnyPointerType()) {
  if (qual_type->isObjCObjectPointerType())
    return lldb::eLanguageTypeObjC;
  if (qual_type->getPointeeCXXRecordDecl())
    return lldb::eLanguageTypeC_plus_plus;

  clang::QualType pointee_type(qual_type->getPointeeType());
  if (pointee_type->getPointeeCXXRecordDecl())
    return lldb::eLanguageTypeC_plus_plus;
  if (pointee_type->isObjCObjectOrInterfaceType())
    return lldb::eLanguageTypeObjC;
  if (pointee_type->isObjCClassType())
    return lldb::eLanguageTypeObjC;
  if (pointee_type.getTypePtr() ==
      getASTContext().ObjCBuiltinIdTy.getTypePtr())
    return lldb::eLanguageTypeObjC;
} else {
  if (qual_type->isObjCObjectOrInterfaceType())
    return lldb::eLanguageTypeObjC;
  if (qual_type->getAsCXXRecordDecl())
    return lldb::eLanguageTypeC_plus_plus;
  switch (qual_type->getTypeClass()) {
  default:
    break;
  case clang::Type::Builtin:
    switch (llvm::cast<clang::BuiltinType>(qual_type)->getKind()) {
    default:
    case clang::BuiltinType::Void:
    case clang::BuiltinType::Bool:
    case clang::BuiltinType::Char_U:
    case clang::BuiltinType::UChar:
    case clang::BuiltinType::WChar_U:
    case clang::BuiltinType::Char16:
    case clang::BuiltinType::Char32:
    case clang::BuiltinType::UShort:
    case clang::BuiltinType::UInt:
    case clang::BuiltinType::ULong:
    case clang::BuiltinType::ULongLong:
    case clang::BuiltinType::UInt128:
    case clang::BuiltinType::Char_S:
    case clang::BuiltinType::SChar:
    case clang::BuiltinType::WChar_S:
    case clang::BuiltinType::Short:
    case clang::BuiltinType::Int:
    case clang::BuiltinType::Long:
    case clang::BuiltinType::LongLong:
    case clang::BuiltinType::Int128:
    case clang::BuiltinType::Float:
    case clang::BuiltinType::Double:
    case clang::BuiltinType::LongDouble:
      break;

    case clang::BuiltinType::NullPtr:
      return eLanguageTypeC_plus_plus;

    case clang::BuiltinType::ObjCId:
    case clang::BuiltinType::ObjCClass:
    case clang::BuiltinType::ObjCSel:
      return eLanguageTypeObjC;

    case clang::BuiltinType::Dependent:
    case clang::BuiltinType::Overload:
    case clang::BuiltinType::BoundMember:
    case clang::BuiltinType::UnknownAny:
      break;
    }
    break;
  case clang::Type::Typedef:
    return GetType(llvm::cast<clang::TypedefType>(qual_type)
                       ->getDecl()
                       ->getUnderlyingType())
        .GetMinimumLanguage();
  }
}
return lldb::eLanguageTypeC;
4066}

4068lldb::TypeClass
4069TypeSystemClang::GetTypeClass(lldb::opaque_compiler_type_t type) {
if (!type)
  return lldb::eTypeClassInvalid;

clang::QualType qual_type =
    RemoveWrappingTypes(GetQualType(type), {clang::Type::Typedef});

switch (qual_type->getTypeClass()) {
case clang::Type::Atomic:
case clang::Type::Auto:
case clang::Type::Decltype:
case clang::Type::Elaborated:
case clang::Type::Paren:
case clang::Type::TypeOf:
case clang::Type::TypeOfExpr:
  llvm_unreachable("Handled in RemoveWrappingTypes!")__builtin_unreachable();
case clang::Type::UnaryTransform:
  break;
case clang::Type::FunctionNoProto:
  return lldb::eTypeClassFunction;
case clang::Type::FunctionProto:
  return lldb::eTypeClassFunction;
case clang::Type::IncompleteArray:
  return lldb::eTypeClassArray;
case clang::Type::VariableArray:
  return lldb::eTypeClassArray;
case clang::Type::ConstantArray:
  return lldb::eTypeClassArray;
case clang::Type::DependentSizedArray:
  return lldb::eTypeClassArray;
case clang::Type::DependentSizedExtVector:
  return lldb::eTypeClassVector;
case clang::Type::DependentVector:
  return lldb::eTypeClassVector;
case clang::Type::ExtVector:
  return lldb::eTypeClassVector;
case clang::Type::Vector:
  return lldb::eTypeClassVector;
case clang::Type::Builtin:
// Ext-Int is just an integer type.
case clang::Type::ExtInt:
case clang::Type::DependentExtInt:
  return lldb::eTypeClassBuiltin;
case clang::Type::ObjCObjectPointer:
  return lldb::eTypeClassObjCObjectPointer;
case clang::Type::BlockPointer:
  return lldb::eTypeClassBlockPointer;
case clang::Type::Pointer:
  return lldb::eTypeClassPointer;
case clang::Type::LValueReference:
  return lldb::eTypeClassReference;
case clang::Type::RValueReference:
  return lldb::eTypeClassReference;
case clang::Type::MemberPointer:
  return lldb::eTypeClassMemberPointer;
case clang::Type::Complex:
  if (qual_type->isComplexType())
    return lldb::eTypeClassComplexFloat;
  else
    return lldb::eTypeClassComplexInteger;
case clang::Type::ObjCObject:
  return lldb::eTypeClassObjCObject;
case clang::Type::ObjCInterface:
  return lldb::eTypeClassObjCInterface;
case clang::Type::Record: {
  const clang::RecordType *record_type =
      llvm::cast<clang::RecordType>(qual_type.getTypePtr());
  const clang::RecordDecl *record_decl = record_type->getDecl();
  if (record_decl->isUnion())
    return lldb::eTypeClassUnion;
  else if (record_decl->isStruct())
    return lldb::eTypeClassStruct;
  else
    return lldb::eTypeClassClass;
} break;
case clang::Type::Enum:
  return lldb::eTypeClassEnumeration;
case clang::Type::Typedef:
  return lldb::eTypeClassTypedef;
case clang::Type::UnresolvedUsing:
  break;

case clang::Type::Attributed:
  break;
case clang::Type::TemplateTypeParm:
  break;
case clang::Type::SubstTemplateTypeParm:
  break;
case clang::Type::SubstTemplateTypeParmPack:
  break;
case clang::Type::InjectedClassName:
  break;
case clang::Type::DependentName:
  break;
case clang::Type::DependentTemplateSpecialization:
  break;
case clang::Type::PackExpansion:
  break;

case clang::Type::TemplateSpecialization:
  break;
case clang::Type::DeducedTemplateSpecialization:
  break;
case clang::Type::Pipe:
  break;

// pointer type decayed from an array or function type.
case clang::Type::Decayed:
  break;
case clang::Type::Adjusted:
  break;
case clang::Type::ObjCTypeParam:
  break;

case clang::Type::DependentAddressSpace:
  break;
case clang::Type::MacroQualified:
  break;

// Matrix types that we're not sure how to display at the moment.
case clang::Type::ConstantMatrix:
case clang::Type::DependentSizedMatrix:
  break;
}
// We don't know hot to display this type...
return lldb::eTypeClassOther;
4195}

4197unsigned TypeSystemClang::GetTypeQualifiers(lldb::opaque_compiler_type_t type) {
if (type)
  return GetQualType(type).getQualifiers().getCVRQualifiers();
return 0;
4201}

4203// Creating related types

4205CompilerType
4206TypeSystemClang::GetArrayElementType(lldb::opaque_compiler_type_t type,
                                   ExecutionContextScope *exe_scope) {
if (type) {
  clang::QualType qual_type(GetQualType(type));

  const clang::Type *array_eletype =
      qual_type.getTypePtr()->getArrayElementTypeNoTypeQual();

  if (!array_eletype)
    return CompilerType();

  return GetType(clang::QualType(array_eletype, 0));
}
return CompilerType();
4220}

4222CompilerType TypeSystemClang::GetArrayType(lldb::opaque_compiler_type_t type,
                                         uint64_t size) {
if (type) {
  clang::QualType qual_type(GetCanonicalQualType(type));
  clang::ASTContext &ast_ctx = getASTContext();
  if (size != 0)
    return GetType(ast_ctx.getConstantArrayType(
        qual_type, llvm::APInt(64, size), nullptr,
        clang::ArrayType::ArraySizeModifier::Normal, 0));
  else
    return GetType(ast_ctx.getIncompleteArrayType(
        qual_type, clang::ArrayType::ArraySizeModifier::Normal, 0));
}

return CompilerType();
4237}

4239CompilerType
4240TypeSystemClang::GetCanonicalType(lldb::opaque_compiler_type_t type) {
if (type)
  return GetType(GetCanonicalQualType(type));
return CompilerType();
4244}

4246static clang::QualType GetFullyUnqualifiedType_Impl(clang::ASTContext *ast,
                                                  clang::QualType qual_type) {
if (qual_type->isPointerType())
  qual_type = ast->getPointerType(
      GetFullyUnqualifiedType_Impl(ast, qual_type->getPointeeType()));
else
  qual_type = qual_type.getUnqualifiedType();
qual_type.removeLocalConst();
qual_type.removeLocalRestrict();
qual_type.removeLocalVolatile();
return qual_type;
4257}

4259CompilerType
4260TypeSystemClang::GetFullyUnqualifiedType(lldb::opaque_compiler_type_t type) {
if (type)
  return GetType(
      GetFullyUnqualifiedType_Impl(&getASTContext(), GetQualType(type)));
return CompilerType();
4265}

4267CompilerType
4268TypeSystemClang::GetEnumerationIntegerType(lldb::opaque_compiler_type_t type) {
if (type)
  return GetEnumerationIntegerType(GetType(GetCanonicalQualType(type)));
return CompilerType();
4272}

4274int TypeSystemClang::GetFunctionArgumentCount(
  lldb::opaque_compiler_type_t type) {
if (type) {
  const clang::FunctionProtoType *func =
      llvm::dyn_cast<clang::FunctionProtoType>(GetCanonicalQualType(type));
  if (func)
    return func->getNumParams();
}
return -1;
4283}

4285CompilerType TypeSystemClang::GetFunctionArgumentTypeAtIndex(
  lldb::opaque_compiler_type_t type, size_t idx) {
if (type) {
  const clang::FunctionProtoType *func =
      llvm::dyn_cast<clang::FunctionProtoType>(GetQualType(type));
  if (func) {
    const uint32_t num_args = func->getNumParams();
    if (idx < num_args)
      return GetType(func->getParamType(idx));
  }
}
return CompilerType();
4297}

4299CompilerType
4300TypeSystemClang::GetFunctionReturnType(lldb::opaque_compiler_type_t type) {
if (type) {
  clang::QualType qual_type(GetQualType(type));
  const clang::FunctionProtoType *func =
      llvm::dyn_cast<clang::FunctionProtoType>(qual_type.getTypePtr());
  if (func)
    return GetType(func->getReturnType());
}
return CompilerType();
4309}

4311size_t
4312TypeSystemClang::GetNumMemberFunctions(lldb::opaque_compiler_type_t type) {
size_t num_functions = 0;
if (type) {
  clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));
  switch (qual_type->getTypeClass()) {
  case clang::Type::Record:
    if (GetCompleteQualType(&getASTContext(), qual_type)) {
      const clang::RecordType *record_type =
          llvm::cast<clang::RecordType>(qual_type.getTypePtr());
      const clang::RecordDecl *record_decl = record_type->getDecl();
      assert(record_decl)((void)0);
      const clang::CXXRecordDecl *cxx_record_decl =
          llvm::dyn_cast<clang::CXXRecordDecl>(record_decl);
      if (cxx_record_decl)
        num_functions = std::distance(cxx_record_decl->method_begin(),
                                      cxx_record_decl->method_end());
    }
    break;

  case clang::Type::ObjCObjectPointer: {
    const clang::ObjCObjectPointerType *objc_class_type =
        qual_type->getAs<clang::ObjCObjectPointerType>();
    const clang::ObjCInterfaceType *objc_interface_type =
        objc_class_type->getInterfaceType();
    if (objc_interface_type &&
        GetCompleteType(static_cast<lldb::opaque_compiler_type_t>(
            const_cast<clang::ObjCInterfaceType *>(objc_interface_type)))) {
      clang::ObjCInterfaceDecl *class_interface_decl =
          objc_interface_type->getDecl();
      if (class_interface_decl) {
        num_functions = std::distance(class_interface_decl->meth_begin(),
                                      class_interface_decl->meth_end());
      }
    }
    break;
  }

  case clang::Type::ObjCObject:
  case clang::Type::ObjCInterface:
    if (GetCompleteType(type)) {
      const clang::ObjCObjectType *objc_class_type =
          llvm::dyn_cast<clang::ObjCObjectType>(qual_type.getTypePtr());
      if (objc_class_type) {
        clang::ObjCInterfaceDecl *class_interface_decl =
            objc_class_type->getInterface();
        if (class_interface_decl)
          num_functions = std::distance(class_interface_decl->meth_begin(),
                                        class_interface_decl->meth_end());
      }
    }
    break;

  default:
    break;
  }
}
return num_functions;
4369}

4371TypeMemberFunctionImpl
4372TypeSystemClang::GetMemberFunctionAtIndex(lldb::opaque_compiler_type_t type,
                                        size_t idx) {
std::string name;
MemberFunctionKind kind(MemberFunctionKind::eMemberFunctionKindUnknown);
CompilerType clang_type;
CompilerDecl clang_decl;
if (type) {
  clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));
  switch (qual_type->getTypeClass()) {
  case clang::Type::Record:
    if (GetCompleteQualType(&getASTContext(), qual_type)) {
      const clang::RecordType *record_type =
          llvm::cast<clang::RecordType>(qual_type.getTypePtr());
      const clang::RecordDecl *record_decl = record_type->getDecl();
      assert(record_decl)((void)0);
      const clang::CXXRecordDecl *cxx_record_decl =
          llvm::dyn_cast<clang::CXXRecordDecl>(record_decl);
      if (cxx_record_decl) {
        auto method_iter = cxx_record_decl->method_begin();
        auto method_end = cxx_record_decl->method_end();
        if (idx <
            static_cast<size_t>(std::distance(method_iter, method_end))) {
          std::advance(method_iter, idx);
          clang::CXXMethodDecl *cxx_method_decl =
              method_iter->getCanonicalDecl();
          if (cxx_method_decl) {
            name = cxx_method_decl->getDeclName().getAsString();
            if (cxx_method_decl->isStatic())
              kind = lldb::eMemberFunctionKindStaticMethod;
            else if (llvm::isa<clang::CXXConstructorDecl>(cxx_method_decl))
              kind = lldb::eMemberFunctionKindConstructor;
            else if (llvm::isa<clang::CXXDestructorDecl>(cxx_method_decl))
              kind = lldb::eMemberFunctionKindDestructor;
            else
              kind = lldb::eMemberFunctionKindInstanceMethod;
            clang_type = GetType(cxx_method_decl->getType());
            clang_decl = GetCompilerDecl(cxx_method_decl);
          }
        }
      }
    }
    break;

  case clang::Type::ObjCObjectPointer: {
    const clang::ObjCObjectPointerType *objc_class_type =
        qual_type->getAs<clang::ObjCObjectPointerType>();
    const clang::ObjCInterfaceType *objc_interface_type =
        objc_class_type->getInterfaceType();
    if (objc_interface_type &&
        GetCompleteType(static_cast<lldb::opaque_compiler_type_t>(
            const_cast<clang::ObjCInterfaceType *>(objc_interface_type)))) {
      clang::ObjCInterfaceDecl *class_interface_decl =
          objc_interface_type->getDecl();
      if (class_interface_decl) {
        auto method_iter = class_interface_decl->meth_begin();
        auto method_end = class_interface_decl->meth_end();
        if (idx <
            static_cast<size_t>(std::distance(method_iter, method_end))) {
          std::advance(method_iter, idx);
          clang::ObjCMethodDecl *objc_method_decl =
              method_iter->getCanonicalDecl();
          if (objc_method_decl) {
            clang_decl = GetCompilerDecl(objc_method_decl);
            name = objc_method_decl->getSelector().getAsString();
            if (objc_method_decl->isClassMethod())
              kind = lldb::eMemberFunctionKindStaticMethod;
            else
              kind = lldb::eMemberFunctionKindInstanceMethod;
          }
        }
      }
    }
    break;
  }

  case clang::Type::ObjCObject:
  case clang::Type::ObjCInterface:
    if (GetCompleteType(type)) {
      const clang::ObjCObjectType *objc_class_type =
          llvm::dyn_cast<clang::ObjCObjectType>(qual_type.getTypePtr());
      if (objc_class_type) {
        clang::ObjCInterfaceDecl *class_interface_decl =
            objc_class_type->getInterface();
        if (class_interface_decl) {
          auto method_iter = class_interface_decl->meth_begin();
          auto method_end = class_interface_decl->meth_end();
          if (idx <
              static_cast<size_t>(std::distance(method_iter, method_end))) {
            std::advance(method_iter, idx);
            clang::ObjCMethodDecl *objc_method_decl =
                method_iter->getCanonicalDecl();
            if (objc_method_decl) {
              clang_decl = GetCompilerDecl(objc_method_decl);
              name = objc_method_decl->getSelector().getAsString();
              if (objc_method_decl->isClassMethod())
                kind = lldb::eMemberFunctionKindStaticMethod;
              else
                kind = lldb::eMemberFunctionKindInstanceMethod;
            }
          }
        }
      }
    }
    break;

  default:
    break;
  }
}

if (kind == eMemberFunctionKindUnknown)
  return TypeMemberFunctionImpl();
else
  return TypeMemberFunctionImpl(clang_type, clang_decl, name, kind);
4486}

4488CompilerType
4489TypeSystemClang::GetNonReferenceType(lldb::opaque_compiler_type_t type) {
if (type)
  return GetType(GetQualType(type).getNonReferenceType());
return CompilerType();
4493}

4495CompilerType
4496TypeSystemClang::GetPointeeType(lldb::opaque_compiler_type_t type) {
if (type) {
  clang::QualType qual_type(GetQualType(type));
  return GetType(qual_type.getTypePtr()->getPointeeType());
}
return CompilerType();
4502}

4504CompilerType
4505TypeSystemClang::GetPointerType(lldb::opaque_compiler_type_t type) {
if (type) {
  clang::QualType qual_type(GetQualType(type));

  switch (qual_type.getDesugaredType(getASTContext())->getTypeClass()) {
  case clang::Type::ObjCObject:
  case clang::Type::ObjCInterface:
    return GetType(getASTContext().getObjCObjectPointerType(qual_type));

  default:
    return GetType(getASTContext().getPointerType(qual_type));
  }
}
return CompilerType();
4519}

4521CompilerType
4522TypeSystemClang::GetLValueReferenceType(lldb::opaque_compiler_type_t type) {
if (type)
  return GetType(getASTContext().getLValueReferenceType(GetQualType(type)));
else
  return CompilerType();
4527}

4529CompilerType
4530TypeSystemClang::GetRValueReferenceType(lldb::opaque_compiler_type_t type) {
if (type)
  return GetType(getASTContext().getRValueReferenceType(GetQualType(type)));
else
  return CompilerType();
4535}

4537CompilerType TypeSystemClang::GetAtomicType(lldb::opaque_compiler_type_t type) {
if (!type)
  return CompilerType();
return GetType(getASTContext().getAtomicType(GetQualType(type)));
4541}

4543CompilerType
4544TypeSystemClang::AddConstModifier(lldb::opaque_compiler_type_t type) {
if (type) {
  clang::QualType result(GetQualType(type));
  result.addConst();
  return GetType(result);
}
return CompilerType();
4551}

4553CompilerType
4554TypeSystemClang::AddVolatileModifier(lldb::opaque_compiler_type_t type) {
if (type) {
  clang::QualType result(GetQualType(type));
  result.addVolatile();
  return GetType(result);
}
return CompilerType();
4561}

4563CompilerType
4564TypeSystemClang::AddRestrictModifier(lldb::opaque_compiler_type_t type) {
if (type) {
  clang::QualType result(GetQualType(type));
  result.addRestrict();
  return GetType(result);
}
return CompilerType();
4571}

4573CompilerType TypeSystemClang::CreateTypedef(
  lldb::opaque_compiler_type_t type, const char *typedef_name,
  const CompilerDeclContext &compiler_decl_ctx, uint32_t payload) {
if (type && typedef_name && typedef_name[0]) {
  clang::ASTContext &clang_ast = getASTContext();
  clang::QualType qual_type(GetQualType(type));

  clang::DeclContext *decl_ctx =
      TypeSystemClang::DeclContextGetAsDeclContext(compiler_decl_ctx);
  if (!decl_ctx)
    decl_ctx = getASTContext().getTranslationUnitDecl();

  clang::TypedefDecl *decl =
      clang::TypedefDecl::CreateDeserialized(clang_ast, 0);
  decl->setDeclContext(decl_ctx);
  decl->setDeclName(&clang_ast.Idents.get(typedef_name));
  decl->setTypeSourceInfo(clang_ast.getTrivialTypeSourceInfo(qual_type));
  decl_ctx->addDecl(decl);
  SetOwningModule(decl, TypePayloadClang(payload).GetOwningModule());

  clang::TagDecl *tdecl = nullptr;
  if (!qual_type.isNull()) {
    if (const clang::RecordType *rt = qual_type->getAs<clang::RecordType>())
      tdecl = rt->getDecl();
    if (const clang::EnumType *et = qual_type->getAs<clang::EnumType>())
      tdecl = et->getDecl();
  }

  // Check whether this declaration is an anonymous struct, union, or enum,
  // hidden behind a typedef. If so, we try to check whether we have a
  // typedef tag to attach to the original record declaration
  if (tdecl && !tdecl->getIdentifier() && !tdecl->getTypedefNameForAnonDecl())
    tdecl->setTypedefNameForAnonDecl(decl);

  decl->setAccess(clang::AS_public); // TODO respect proper access specifier

  // Get a uniqued clang::QualType for the typedef decl type
  return GetType(clang_ast.getTypedefType(decl));
}
return CompilerType();
4613}

4615CompilerType
4616TypeSystemClang::GetTypedefedType(lldb::opaque_compiler_type_t type) {
if (type) {
  const clang::TypedefType *typedef_type = llvm::dyn_cast<clang::TypedefType>(
      RemoveWrappingTypes(GetQualType(type), {clang::Type::Typedef}));
  if (typedef_type)
    return GetType(typedef_type->getDecl()->getUnderlyingType());
}
return CompilerType();
4624}

4626// Create related types using the current type's AST

4628CompilerType TypeSystemClang::GetBasicTypeFromAST(lldb::BasicType basic_type) {
return TypeSystemClang::GetBasicType(basic_type);
4630}
4631// Exploring the type

4633const llvm::fltSemantics &
4634TypeSystemClang::GetFloatTypeSemantics(size_t byte_size) {
clang::ASTContext &ast = getASTContext();
const size_t bit_size = byte_size * 8;
if (bit_size == ast.getTypeSize(ast.FloatTy))
  return ast.getFloatTypeSemantics(ast.FloatTy);
else if (bit_size == ast.getTypeSize(ast.DoubleTy))
  return ast.getFloatTypeSemantics(ast.DoubleTy);
else if (bit_size == ast.getTypeSize(ast.LongDoubleTy))
  return ast.getFloatTypeSemantics(ast.LongDoubleTy);
else if (bit_size == ast.getTypeSize(ast.HalfTy))
  return ast.getFloatTypeSemantics(ast.HalfTy);
return llvm::APFloatBase::Bogus();
4646}

4648Optional<uint64_t>
4649TypeSystemClang::GetBitSize(lldb::opaque_compiler_type_t type,
                          ExecutionContextScope *exe_scope) {
if (GetCompleteType(type)) {
  clang::QualType qual_type(GetCanonicalQualType(type));
  const clang::Type::TypeClass type_class = qual_type->getTypeClass();
  switch (type_class) {
  case clang::Type::Record:
    if (GetCompleteType(type))
      return getASTContext().getTypeSize(qual_type);
    else
      return None;
    break;

  case clang::Type::ObjCInterface:
  case clang::Type::ObjCObject: {
    ExecutionContext exe_ctx(exe_scope);
    Process *process = exe_ctx.GetProcessPtr();
    if (process) {
      ObjCLanguageRuntime *objc_runtime = ObjCLanguageRuntime::Get(*process);
      if (objc_runtime) {
        uint64_t bit_size = 0;
        if (objc_runtime->GetTypeBitSize(GetType(qual_type), bit_size))
          return bit_size;
      }
    } else {
      static bool g_printed = false;
      if (!g_printed) {
        StreamString s;
        DumpTypeDescription(type, &s);

        llvm::outs() << "warning: trying to determine the size of type ";
        llvm::outs() << s.GetString() << "\n";
        llvm::outs() << "without a valid ExecutionContext. this is not "
                        "reliable. please file a bug against LLDB.\n";
        llvm::outs() << "backtrace:\n";
        llvm::sys::PrintStackTrace(llvm::outs());
        llvm::outs() << "\n";
        g_printed = true;
      }
    }
  }
    LLVM_FALLTHROUGH[[gnu::fallthrough]];
  default:
    const uint32_t bit_size = getASTContext().getTypeSize(qual_type);
    if (bit_size == 0) {
      if (qual_type->isIncompleteArrayType())
        return getASTContext().getTypeSize(
            qual_type->getArrayElementTypeNoTypeQual()
                ->getCanonicalTypeUnqualified());
    }
    if (qual_type->isObjCObjectOrInterfaceType())
      return bit_size +
             getASTContext().getTypeSize(getASTContext().ObjCBuiltinClassTy);
    // Function types actually have a size of 0, that's not an error.
    if (qual_type->isFunctionProtoType())
      return bit_size;
    if (bit_size)
      return bit_size;
  }
}
return None;
4710}

4712llvm::Optional<size_t>
4713TypeSystemClang::GetTypeBitAlign(lldb::opaque_compiler_type_t type,
                               ExecutionContextScope *exe_scope) {
if (GetCompleteType(type))
  return getASTContext().getTypeAlign(GetQualType(type));
return {};
4718}

4720lldb::Encoding TypeSystemClang::GetEncoding(lldb::opaque_compiler_type_t type,
                                          uint64_t &count) {
if (!type)
  return lldb::eEncodingInvalid;

count = 1;
clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));

switch (qual_type->getTypeClass()) {
case clang::Type::Atomic:
case clang::Type::Auto:
case clang::Type::Decltype:
case clang::Type::Elaborated:
case clang::Type::Paren:
case clang::Type::Typedef:
case clang::Type::TypeOf:
case clang::Type::TypeOfExpr:
  llvm_unreachable("Handled in RemoveWrappingTypes!")__builtin_unreachable();

case clang::Type::UnaryTransform:
  break;

case clang::Type::FunctionNoProto:
case clang::Type::FunctionProto:
  break;

case clang::Type::IncompleteArray:
case clang::Type::VariableArray:
  break;

case clang::Type::ConstantArray:
  break;

case clang::Type::DependentVector:
case clang::Type::ExtVector:
case clang::Type::Vector:
  // TODO: Set this to more than one???
  break;

case clang::Type::ExtInt:
case clang::Type::DependentExtInt:
  return qual_type->isUnsignedIntegerType() ? lldb::eEncodingUint
                                            : lldb::eEncodingSint;

case clang::Type::Builtin:
  switch (llvm::cast<clang::BuiltinType>(qual_type)->getKind()) {
  case clang::BuiltinType::Void:
    break;

  case clang::BuiltinType::Char_S:
  case clang::BuiltinType::SChar:
  case clang::BuiltinType::WChar_S:
  case clang::BuiltinType::Short:
  case clang::BuiltinType::Int:
  case clang::BuiltinType::Long:
  case clang::BuiltinType::LongLong:
  case clang::BuiltinType::Int128:
    return lldb::eEncodingSint;

  case clang::BuiltinType::Bool:
  case clang::BuiltinType::Char_U:
  case clang::BuiltinType::UChar:
  case clang::BuiltinType::WChar_U:
  case clang::BuiltinType::Char8:
  case clang::BuiltinType::Char16:
  case clang::BuiltinType::Char32:
  case clang::BuiltinType::UShort:
  case clang::BuiltinType::UInt:
  case clang::BuiltinType::ULong:
  case clang::BuiltinType::ULongLong:
  case clang::BuiltinType::UInt128:
    return lldb::eEncodingUint;

  // Fixed point types. Note that they are currently ignored.
  case clang::BuiltinType::ShortAccum:
  case clang::BuiltinType::Accum:
  case clang::BuiltinType::LongAccum:
  case clang::BuiltinType::UShortAccum:
  case clang::BuiltinType::UAccum:
  case clang::BuiltinType::ULongAccum:
  case clang::BuiltinType::ShortFract:
  case clang::BuiltinType::Fract:
  case clang::BuiltinType::LongFract:
  case clang::BuiltinType::UShortFract:
  case clang::BuiltinType::UFract:
  case clang::BuiltinType::ULongFract:
  case clang::BuiltinType::SatShortAccum:
  case clang::BuiltinType::SatAccum:
  case clang::BuiltinType::SatLongAccum:
  case clang::BuiltinType::SatUShortAccum:
  case clang::BuiltinType::SatUAccum:
  case clang::BuiltinType::SatULongAccum:
  case clang::BuiltinType::SatShortFract:
  case clang::BuiltinType::SatFract:
  case clang::BuiltinType::SatLongFract:
  case clang::BuiltinType::SatUShortFract:
  case clang::BuiltinType::SatUFract:
  case clang::BuiltinType::SatULongFract:
    break;

  case clang::BuiltinType::Half:
  case clang::BuiltinType::Float:
  case clang::BuiltinType::Float16:
  case clang::BuiltinType::Float128:
  case clang::BuiltinType::Double:
  case clang::BuiltinType::LongDouble:
  case clang::BuiltinType::BFloat16:
    return lldb::eEncodingIEEE754;

  case clang::BuiltinType::ObjCClass:
  case clang::BuiltinType::ObjCId:
  case clang::BuiltinType::ObjCSel:
    return lldb::eEncodingUint;

  case clang::BuiltinType::NullPtr:
    return lldb::eEncodingUint;

  case clang::BuiltinType::Kind::ARCUnbridgedCast:
  case clang::BuiltinType::Kind::BoundMember:
  case clang::BuiltinType::Kind::BuiltinFn:
  case clang::BuiltinType::Kind::Dependent:
  case clang::BuiltinType::Kind::OCLClkEvent:
  case clang::BuiltinType::Kind::OCLEvent:
  case clang::BuiltinType::Kind::OCLImage1dRO:
  case clang::BuiltinType::Kind::OCLImage1dWO:
  case clang::BuiltinType::Kind::OCLImage1dRW:
  case clang::BuiltinType::Kind::OCLImage1dArrayRO:
  case clang::BuiltinType::Kind::OCLImage1dArrayWO:
  case clang::BuiltinType::Kind::OCLImage1dArrayRW:
  case clang::BuiltinType::Kind::OCLImage1dBufferRO:
  case clang::BuiltinType::Kind::OCLImage1dBufferWO:
  case clang::BuiltinType::Kind::OCLImage1dBufferRW:
  case clang::BuiltinType::Kind::OCLImage2dRO:
  case clang::BuiltinType::Kind::OCLImage2dWO:
  case clang::BuiltinType::Kind::OCLImage2dRW:
  case clang::BuiltinType::Kind::OCLImage2dArrayRO:
  case clang::BuiltinType::Kind::OCLImage2dArrayWO:
  case clang::BuiltinType::Kind::OCLImage2dArrayRW:
  case clang::BuiltinType::Kind::OCLImage2dArrayDepthRO:
  case clang::BuiltinType::Kind::OCLImage2dArrayDepthWO:
  case clang::BuiltinType::Kind::OCLImage2dArrayDepthRW:
  case clang::BuiltinType::Kind::OCLImage2dArrayMSAARO:
  case clang::BuiltinType::Kind::OCLImage2dArrayMSAAWO:
  case clang::BuiltinType::Kind::OCLImage2dArrayMSAARW:
  case clang::BuiltinType::Kind::OCLImage2dArrayMSAADepthRO:
  case clang::BuiltinType::Kind::OCLImage2dArrayMSAADepthWO:
  case clang::BuiltinType::Kind::OCLImage2dArrayMSAADepthRW:
  case clang::BuiltinType::Kind::OCLImage2dDepthRO:
  case clang::BuiltinType::Kind::OCLImage2dDepthWO:
  case clang::BuiltinType::Kind::OCLImage2dDepthRW:
  case clang::BuiltinType::Kind::OCLImage2dMSAARO:
  case clang::BuiltinType::Kind::OCLImage2dMSAAWO:
  case clang::BuiltinType::Kind::OCLImage2dMSAARW:
  case clang::BuiltinType::Kind::OCLImage2dMSAADepthRO:
  case clang::BuiltinType::Kind::OCLImage2dMSAADepthWO:
  case clang::BuiltinType::Kind::OCLImage2dMSAADepthRW:
  case clang::BuiltinType::Kind::OCLImage3dRO:
  case clang::BuiltinType::Kind::OCLImage3dWO:
  case clang::BuiltinType::Kind::OCLImage3dRW:
  case clang::BuiltinType::Kind::OCLQueue:
  case clang::BuiltinType::Kind::OCLReserveID:
  case clang::BuiltinType::Kind::OCLSampler:
  case clang::BuiltinType::Kind::OMPArraySection:
  case clang::BuiltinType::Kind::OMPArrayShaping:
  case clang::BuiltinType::Kind::OMPIterator:
  case clang::BuiltinType::Kind::Overload:
  case clang::BuiltinType::Kind::PseudoObject:
  case clang::BuiltinType::Kind::UnknownAny:
    break;

  case clang::BuiltinType::OCLIntelSubgroupAVCMcePayload:
  case clang::BuiltinType::OCLIntelSubgroupAVCImePayload:
  case clang::BuiltinType::OCLIntelSubgroupAVCRefPayload:
  case clang::BuiltinType::OCLIntelSubgroupAVCSicPayload:
  case clang::BuiltinType::OCLIntelSubgroupAVCMceResult:
  case clang::BuiltinType::OCLIntelSubgroupAVCImeResult:
  case clang::BuiltinType::OCLIntelSubgroupAVCRefResult:
  case clang::BuiltinType::OCLIntelSubgroupAVCSicResult:
  case clang::BuiltinType::OCLIntelSubgroupAVCImeResultSingleRefStreamout:
  case clang::BuiltinType::OCLIntelSubgroupAVCImeResultDualRefStreamout:
  case clang::BuiltinType::OCLIntelSubgroupAVCImeSingleRefStreamin:
  case clang::BuiltinType::OCLIntelSubgroupAVCImeDualRefStreamin:
    break;

  // PowerPC -- Matrix Multiply Assist
  case clang::BuiltinType::VectorPair:
  case clang::BuiltinType::VectorQuad:
    break;

  // ARM -- Scalable Vector Extension
  case clang::BuiltinType::SveBool:
  case clang::BuiltinType::SveInt8:
  case clang::BuiltinType::SveInt8x2:
  case clang::BuiltinType::SveInt8x3:
  case clang::BuiltinType::SveInt8x4:
  case clang::BuiltinType::SveInt16:
  case clang::BuiltinType::SveInt16x2:
  case clang::BuiltinType::SveInt16x3:
  case clang::BuiltinType::SveInt16x4:
  case clang::BuiltinType::SveInt32:
  case clang::BuiltinType::SveInt32x2:
  case clang::BuiltinType::SveInt32x3:
  case clang::BuiltinType::SveInt32x4:
  case clang::BuiltinType::SveInt64:
  case clang::BuiltinType::SveInt64x2:
  case clang::BuiltinType::SveInt64x3:
  case clang::BuiltinType::SveInt64x4:
  case clang::BuiltinType::SveUint8:
  case clang::BuiltinType::SveUint8x2:
  case clang::BuiltinType::SveUint8x3:
  case clang::BuiltinType::SveUint8x4:
  case clang::BuiltinType::SveUint16:
  case clang::BuiltinType::SveUint16x2:
  case clang::BuiltinType::SveUint16x3:
  case clang::BuiltinType::SveUint16x4:
  case clang::BuiltinType::SveUint32:
  case clang::BuiltinType::SveUint32x2:
  case clang::BuiltinType::SveUint32x3:
  case clang::BuiltinType::SveUint32x4:
  case clang::BuiltinType::SveUint64:
  case clang::BuiltinType::SveUint64x2:
  case clang::BuiltinType::SveUint64x3:
  case clang::BuiltinType::SveUint64x4:
  case clang::BuiltinType::SveFloat16:
  case clang::BuiltinType::SveBFloat16:
  case clang::BuiltinType::SveBFloat16x2:
  case clang::BuiltinType::SveBFloat16x3:
  case clang::BuiltinType::SveBFloat16x4:
  case clang::BuiltinType::SveFloat16x2:
  case clang::BuiltinType::SveFloat16x3:
  case clang::BuiltinType::SveFloat16x4:
  case clang::BuiltinType::SveFloat32:
  case clang::BuiltinType::SveFloat32x2:
  case clang::BuiltinType::SveFloat32x3:
  case clang::BuiltinType::SveFloat32x4:
  case clang::BuiltinType::SveFloat64:
  case clang::BuiltinType::SveFloat64x2:
  case clang::BuiltinType::SveFloat64x3:
  case clang::BuiltinType::SveFloat64x4:
    break;

  // RISC-V V builtin types.
  case clang::BuiltinType::RvvInt8mf8:
  case clang::BuiltinType::RvvInt8mf4:
  case clang::BuiltinType::RvvInt8mf2:
  case clang::BuiltinType::RvvInt8m1:
  case clang::BuiltinType::RvvInt8m2:
  case clang::BuiltinType::RvvInt8m4:
  case clang::BuiltinType::RvvInt8m8:
  case clang::BuiltinType::RvvUint8mf8:
  case clang::BuiltinType::RvvUint8mf4:
  case clang::BuiltinType::RvvUint8mf2:
  case clang::BuiltinType::RvvUint8m1:
  case clang::BuiltinType::RvvUint8m2:
  case clang::BuiltinType::RvvUint8m4:
  case clang::BuiltinType::RvvUint8m8:
  case clang::BuiltinType::RvvInt16mf4:
  case clang::BuiltinType::RvvInt16mf2:
  case clang::BuiltinType::RvvInt16m1:
  case clang::BuiltinType::RvvInt16m2:
  case clang::BuiltinType::RvvInt16m4:
  case clang::BuiltinType::RvvInt16m8:
  case clang::BuiltinType::RvvUint16mf4:
  case clang::BuiltinType::RvvUint16mf2:
  case clang::BuiltinType::RvvUint16m1:
  case clang::BuiltinType::RvvUint16m2:
  case clang::BuiltinType::RvvUint16m4:
  case clang::BuiltinType::RvvUint16m8:
  case clang::BuiltinType::RvvInt32mf2:
  case clang::BuiltinType::RvvInt32m1:
  case clang::BuiltinType::RvvInt32m2:
  case clang::BuiltinType::RvvInt32m4:
  case clang::BuiltinType::RvvInt32m8:
  case clang::BuiltinType::RvvUint32mf2:
  case clang::BuiltinType::RvvUint32m1:
  case clang::BuiltinType::RvvUint32m2:
  case clang::BuiltinType::RvvUint32m4:
  case clang::BuiltinType::RvvUint32m8:
  case clang::BuiltinType::RvvInt64m1:
  case clang::BuiltinType::RvvInt64m2:
  case clang::BuiltinType::RvvInt64m4:
  case clang::BuiltinType::RvvInt64m8:
  case clang::BuiltinType::RvvUint64m1:
  case clang::BuiltinType::RvvUint64m2:
  case clang::BuiltinType::RvvUint64m4:
  case clang::BuiltinType::RvvUint64m8:
  case clang::BuiltinType::RvvFloat16mf4:
  case clang::BuiltinType::RvvFloat16mf2:
  case clang::BuiltinType::RvvFloat16m1:
  case clang::BuiltinType::RvvFloat16m2:
  case clang::BuiltinType::RvvFloat16m4:
  case clang::BuiltinType::RvvFloat16m8:
  case clang::BuiltinType::RvvFloat32mf2:
  case clang::BuiltinType::RvvFloat32m1:
  case clang::BuiltinType::RvvFloat32m2:
  case clang::BuiltinType::RvvFloat32m4:
  case clang::BuiltinType::RvvFloat32m8:
  case clang::BuiltinType::RvvFloat64m1:
  case clang::BuiltinType::RvvFloat64m2:
  case clang::BuiltinType::RvvFloat64m4:
  case clang::BuiltinType::RvvFloat64m8:
  case clang::BuiltinType::RvvBool1:
  case clang::BuiltinType::RvvBool2:
  case clang::BuiltinType::RvvBool4:
  case clang::BuiltinType::RvvBool8:
  case clang::BuiltinType::RvvBool16:
  case clang::BuiltinType::RvvBool32:
  case clang::BuiltinType::RvvBool64:
    break;

  case clang::BuiltinType::IncompleteMatrixIdx:
    break;
  }
  break;
// All pointer types are represented as unsigned integer encodings. We may
// nee to add a eEncodingPointer if we ever need to know the difference
case clang::Type::ObjCObjectPointer:
case clang::Type::BlockPointer:
case clang::Type::Pointer:
case clang::Type::LValueReference:
case clang::Type::RValueReference:
case clang::Type::MemberPointer:
  return lldb::eEncodingUint;
case clang::Type::Complex: {
  lldb::Encoding encoding = lldb::eEncodingIEEE754;
  if (qual_type->isComplexType())
    encoding = lldb::eEncodingIEEE754;
  else {
    const clang::ComplexType *complex_type =
        qual_type->getAsComplexIntegerType();
    if (complex_type)
      encoding = GetType(complex_type->getElementType()).GetEncoding(count);
    else
      encoding = lldb::eEncodingSint;
  }
  count = 2;
  return encoding;
}

case clang::Type::ObjCInterface:
  break;
case clang::Type::Record:
  break;
case clang::Type::Enum:
  return lldb::eEncodingSint;
case clang::Type::DependentSizedArray:
case clang::Type::DependentSizedExtVector:
case clang::Type::UnresolvedUsing:
case clang::Type::Attributed:
case clang::Type::TemplateTypeParm:
case clang::Type::SubstTemplateTypeParm:
case clang::Type::SubstTemplateTypeParmPack:
case clang::Type::InjectedClassName:
case clang::Type::DependentName:
case clang::Type::DependentTemplateSpecialization:
case clang::Type::PackExpansion:
case clang::Type::ObjCObject:

case clang::Type::TemplateSpecialization:
case clang::Type::DeducedTemplateSpecialization:
case clang::Type::Adjusted:
case clang::Type::Pipe:
  break;

// pointer type decayed from an array or function type.
case clang::Type::Decayed:
  break;
case clang::Type::ObjCTypeParam:
  break;

case clang::Type::DependentAddressSpace:
  break;
case clang::Type::MacroQualified:
  break;

case clang::Type::ConstantMatrix:
case clang::Type::DependentSizedMatrix:
  break;
}
count = 0;
return lldb::eEncodingInvalid;
5101}

5103lldb::Format TypeSystemClang::GetFormat(lldb::opaque_compiler_type_t type) {
if (!type)
  return lldb::eFormatDefault;

clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));

switch (qual_type->getTypeClass()) {
case clang::Type::Atomic:
case clang::Type::Auto:
case clang::Type::Decltype:
case clang::Type::Elaborated:
case clang::Type::Paren:
case clang::Type::Typedef:
case clang::Type::TypeOf:
case clang::Type::TypeOfExpr:
  llvm_unreachable("Handled in RemoveWrappingTypes!")__builtin_unreachable();
case clang::Type::UnaryTransform:
  break;

case clang::Type::FunctionNoProto:
case clang::Type::FunctionProto:
  break;

case clang::Type::IncompleteArray:
case clang::Type::VariableArray:
  break;

case clang::Type::ConstantArray:
  return lldb::eFormatVoid; // no value

case clang::Type::DependentVector:
case clang::Type::ExtVector:
case clang::Type::Vector:
  break;

case clang::Type::ExtInt:
case clang::Type::DependentExtInt:
  return qual_type->isUnsignedIntegerType() ? lldb::eFormatUnsigned
                                            : lldb::eFormatDecimal;

case clang::Type::Builtin:
  switch (llvm::cast<clang::BuiltinType>(qual_type)->getKind()) {
  case clang::BuiltinType::UnknownAny:
  case clang::BuiltinType::Void:
  case clang::BuiltinType::BoundMember:
    break;

  case clang::BuiltinType::Bool:
    return lldb::eFormatBoolean;
  case clang::BuiltinType::Char_S:
  case clang::BuiltinType::SChar:
  case clang::BuiltinType::WChar_S:
  case clang::BuiltinType::Char_U:
  case clang::BuiltinType::UChar:
  case clang::BuiltinType::WChar_U:
    return lldb::eFormatChar;
  case clang::BuiltinType::Char16:
    return lldb::eFormatUnicode16;
  case clang::BuiltinType::Char32:
    return lldb::eFormatUnicode32;
  case clang::BuiltinType::UShort:
    return lldb::eFormatUnsigned;
  case clang::BuiltinType::Short:
    return lldb::eFormatDecimal;
  case clang::BuiltinType::UInt:
    return lldb::eFormatUnsigned;
  case clang::BuiltinType::Int:
    return lldb::eFormatDecimal;
  case clang::BuiltinType::ULong:
    return lldb::eFormatUnsigned;
  case clang::BuiltinType::Long:
    return lldb::eFormatDecimal;
  case clang::BuiltinType::ULongLong:
    return lldb::eFormatUnsigned;
  case clang::BuiltinType::LongLong:
    return lldb::eFormatDecimal;
  case clang::BuiltinType::UInt128:
    return lldb::eFormatUnsigned;
  case clang::BuiltinType::Int128:
    return lldb::eFormatDecimal;
  case clang::BuiltinType::Half:
  case clang::BuiltinType::Float:
  case clang::BuiltinType::Double:
  case clang::BuiltinType::LongDouble:
    return lldb::eFormatFloat;
  default:
    return lldb::eFormatHex;
  }
  break;
case clang::Type::ObjCObjectPointer:
  return lldb::eFormatHex;
case clang::Type::BlockPointer:
  return lldb::eFormatHex;
case clang::Type::Pointer:
  return lldb::eFormatHex;
case clang::Type::LValueReference:
case clang::Type::RValueReference:
  return lldb::eFormatHex;
case clang::Type::MemberPointer:
  break;
case clang::Type::Complex: {
  if (qual_type->isComplexType())
    return lldb::eFormatComplex;
  else
    return lldb::eFormatComplexInteger;
}
case clang::Type::ObjCInterface:
  break;
case clang::Type::Record:
  break;
case clang::Type::Enum:
  return lldb::eFormatEnum;
case clang::Type::DependentSizedArray:
case clang::Type::DependentSizedExtVector:
case clang::Type::UnresolvedUsing:
case clang::Type::Attributed:
case clang::Type::TemplateTypeParm:
case clang::Type::SubstTemplateTypeParm:
case clang::Type::SubstTemplateTypeParmPack:
case clang::Type::InjectedClassName:
case clang::Type::DependentName:
case clang::Type::DependentTemplateSpecialization:
case clang::Type::PackExpansion:
case clang::Type::ObjCObject:

case clang::Type::TemplateSpecialization:
case clang::Type::DeducedTemplateSpecialization:
case clang::Type::Adjusted:
case clang::Type::Pipe:
  break;

// pointer type decayed from an array or function type.
case clang::Type::Decayed:
  break;
case clang::Type::ObjCTypeParam:
  break;

case clang::Type::DependentAddressSpace:
  break;
case clang::Type::MacroQualified:
  break;

// Matrix types we're not sure how to display yet.
case clang::Type::ConstantMatrix:
case clang::Type::DependentSizedMatrix:
  break;
}
// We don't know hot to display this type...
return lldb::eFormatBytes;
5252}

5254static bool ObjCDeclHasIVars(clang::ObjCInterfaceDecl *class_interface_decl,
                           bool check_superclass) {
while (class_interface_decl) {
  if (class_interface_decl->ivar_size() > 0)
    return true;

  if (check_superclass)
    class_interface_decl = class_interface_decl->getSuperClass();
  else
    break;
}
return false;
5266}

5268static Optional<SymbolFile::ArrayInfo>
5269GetDynamicArrayInfo(TypeSystemClang &ast, SymbolFile *sym_file,
                  clang::QualType qual_type,
                  const ExecutionContext *exe_ctx) {
if (qual_type->isIncompleteArrayType())
  if (auto *metadata = ast.GetMetadata(qual_type.getTypePtr()))
    return sym_file->GetDynamicArrayInfoForUID(metadata->GetUserID(),
                                               exe_ctx);
return llvm::None;
5277}

5279uint32_t TypeSystemClang::GetNumChildren(lldb::opaque_compiler_type_t type,
                                       bool omit_empty_base_classes,
                                       const ExecutionContext *exe_ctx) {
if (!type)
  return 0;

uint32_t num_children = 0;
clang::QualType qual_type(RemoveWrappingTypes(GetQualType(type)));
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Builtin:
  switch (llvm::cast<clang::BuiltinType>(qual_type)->getKind()) {
  case clang::BuiltinType::ObjCId:    // child is Class
  case clang::BuiltinType::ObjCClass: // child is Class
    num_children = 1;
    break;

  default:
    break;
  }
  break;

case clang::Type::Complex:
  return 0;
case clang::Type::Record:
  if (GetCompleteQualType(&getASTContext(), qual_type)) {
    const clang::RecordType *record_type =
        llvm::cast<clang::RecordType>(qual_type.getTypePtr());
    const clang::RecordDecl *record_decl = record_type->getDecl();
    assert(record_decl)((void)0);
    const clang::CXXRecordDecl *cxx_record_decl =
        llvm::dyn_cast<clang::CXXRecordDecl>(record_decl);
    if (cxx_record_decl) {
      if (omit_empty_base_classes) {
        // Check each base classes to see if it or any of its base classes
        // contain any fields. This can help limit the noise in variable
        // views by not having to show base classes that contain no members.
        clang::CXXRecordDecl::base_class_const_iterator base_class,
            base_class_end;
        for (base_class = cxx_record_decl->bases_begin(),
            base_class_end = cxx_record_decl->bases_end();
             base_class != base_class_end; ++base_class) {
          const clang::CXXRecordDecl *base_class_decl =
              llvm::cast<clang::CXXRecordDecl>(
                  base_class->getType()
                      ->getAs<clang::RecordType>()
                      ->getDecl());

          // Skip empty base classes
          if (!TypeSystemClang::RecordHasFields(base_class_decl))
            continue;

          num_children++;
        }
      } else {
        // Include all base classes
        num_children += cxx_record_decl->getNumBases();
      }
    }
    clang::RecordDecl::field_iterator field, field_end;
    for (field = record_decl->field_begin(),
        field_end = record_decl->field_end();
         field != field_end; ++field)
      ++num_children;
  }
  break;

case clang::Type::ObjCObject:
case clang::Type::ObjCInterface:
  if (GetCompleteQualType(&getASTContext(), qual_type)) {
    const clang::ObjCObjectType *objc_class_type =
        llvm::dyn_cast<clang::ObjCObjectType>(qual_type.getTypePtr());
    assert(objc_class_type)((void)0);
    if (objc_class_type) {
      clang::ObjCInterfaceDecl *class_interface_decl =
          objc_class_type->getInterface();

      if (class_interface_decl) {

        clang::ObjCInterfaceDecl *superclass_interface_decl =
            class_interface_decl->getSuperClass();
        if (superclass_interface_decl) {
          if (omit_empty_base_classes) {
            if (ObjCDeclHasIVars(superclass_interface_decl, true))
              ++num_children;
          } else
            ++num_children;
        }

        num_children += class_interface_decl->ivar_size();
      }
    }
  }
  break;

case clang::Type::LValueReference:
case clang::Type::RValueReference:
case clang::Type::ObjCObjectPointer: {
  CompilerType pointee_clang_type(GetPointeeType(type));

  uint32_t num_pointee_children = 0;
  if (pointee_clang_type.IsAggregateType())
    num_pointee_children =
        pointee_clang_type.GetNumChildren(omit_empty_base_classes, exe_ctx);
  // If this type points to a simple type, then it has 1 child
  if (num_pointee_children == 0)
    num_children = 1;
  else
    num_children = num_pointee_children;
} break;

case clang::Type::Vector:
case clang::Type::ExtVector:
  num_children =
      llvm::cast<clang::VectorType>(qual_type.getTypePtr())->getNumElements();
  break;

case clang::Type::ConstantArray:
  num_children = llvm::cast<clang::ConstantArrayType>(qual_type.getTypePtr())
                     ->getSize()
                     .getLimitedValue();
  break;
case clang::Type::IncompleteArray:
  if (auto array_info =
          GetDynamicArrayInfo(*this, GetSymbolFile(), qual_type, exe_ctx))
    // Only 1-dimensional arrays are supported.
    num_children = array_info->element_orders.size()
                       ? array_info->element_orders.back()
                       : 0;
  break;

case clang::Type::Pointer: {
  const clang::PointerType *pointer_type =
      llvm::cast<clang::PointerType>(qual_type.getTypePtr());
  clang::QualType pointee_type(pointer_type->getPointeeType());
  CompilerType pointee_clang_type(GetType(pointee_type));
  uint32_t num_pointee_children = 0;
  if (pointee_clang_type.IsAggregateType())
    num_pointee_children =
        pointee_clang_type.GetNumChildren(omit_empty_base_classes, exe_ctx);
  if (num_pointee_children == 0) {
    // We have a pointer to a pointee type that claims it has no children. We
    // will want to look at
    num_children = GetNumPointeeChildren(pointee_type);
  } else
    num_children = num_pointee_children;
} break;

default:
  break;
}
return num_children;
5431}

5433CompilerType TypeSystemClang::GetBuiltinTypeByName(ConstString name) {
return GetBasicType(GetBasicTypeEnumeration(name));
5435}

5437lldb::BasicType
5438TypeSystemClang::GetBasicTypeEnumeration(lldb::opaque_compiler_type_t type) {
if (type) {
  clang::QualType qual_type(GetQualType(type));
  const clang::Type::TypeClass type_class = qual_type->getTypeClass();
  if (type_class == clang::Type::Builtin) {
    switch (llvm::cast<clang::BuiltinType>(qual_type)->getKind()) {
    case clang::BuiltinType::Void:
      return eBasicTypeVoid;
    case clang::BuiltinType::Bool:
      return eBasicTypeBool;
    case clang::BuiltinType::Char_S:
      return eBasicTypeSignedChar;
    case clang::BuiltinType::Char_U:
      return eBasicTypeUnsignedChar;
    case clang::BuiltinType::Char16:
      return eBasicTypeChar16;
    case clang::BuiltinType::Char32:
      return eBasicTypeChar32;
    case clang::BuiltinType::UChar:
      return eBasicTypeUnsignedChar;
    case clang::BuiltinType::SChar:
      return eBasicTypeSignedChar;
    case clang::BuiltinType::WChar_S:
      return eBasicTypeSignedWChar;
    case clang::BuiltinType::WChar_U:
      return eBasicTypeUnsignedWChar;
    case clang::BuiltinType::Short:
      return eBasicTypeShort;
    case clang::BuiltinType::UShort:
      return eBasicTypeUnsignedShort;
    case clang::BuiltinType::Int:
      return eBasicTypeInt;
    case clang::BuiltinType::UInt:
      return eBasicTypeUnsignedInt;
    case clang::BuiltinType::Long:
      return eBasicTypeLong;
    case clang::BuiltinType::ULong:
      return eBasicTypeUnsignedLong;
    case clang::BuiltinType::LongLong:
      return eBasicTypeLongLong;
    case clang::BuiltinType::ULongLong:
      return eBasicTypeUnsignedLongLong;
    case clang::BuiltinType::Int128:
      return eBasicTypeInt128;
    case clang::BuiltinType::UInt128:
      return eBasicTypeUnsignedInt128;

    case clang::BuiltinType::Half:
      return eBasicTypeHalf;
    case clang::BuiltinType::Float:
      return eBasicTypeFloat;
    case clang::BuiltinType::Double:
      return eBasicTypeDouble;
    case clang::BuiltinType::LongDouble:
      return eBasicTypeLongDouble;

    case clang::BuiltinType::NullPtr:
      return eBasicTypeNullPtr;
    case clang::BuiltinType::ObjCId:
      return eBasicTypeObjCID;
    case clang::BuiltinType::ObjCClass:
      return eBasicTypeObjCClass;
    case clang::BuiltinType::ObjCSel:
      return eBasicTypeObjCSel;
    default:
      return eBasicTypeOther;
    }
  }
}
return eBasicTypeInvalid;
5508}

5510void TypeSystemClang::ForEachEnumerator(
  lldb::opaque_compiler_type_t type,
  std::function<bool(const CompilerType &integer_type,
                     ConstString name,
                     const llvm::APSInt &value)> const &callback) {
const clang::EnumType *enum_type =
    llvm::dyn_cast<clang::EnumType>(GetCanonicalQualType(type));
if (enum_type) {
  const clang::EnumDecl *enum_decl = enum_type->getDecl();
  if (enum_decl) {
    CompilerType integer_type = GetType(enum_decl->getIntegerType());

    clang::EnumDecl::enumerator_iterator enum_pos, enum_end_pos;
    for (enum_pos = enum_decl->enumerator_begin(),
        enum_end_pos = enum_decl->enumerator_end();
         enum_pos != enum_end_pos; ++enum_pos) {
      ConstString name(enum_pos->getNameAsString().c_str());
      if (!callback(integer_type, name, enum_pos->getInitVal()))
        break;
    }
  }
}
5532}

5534#pragma mark Aggregate Types

5536uint32_t TypeSystemClang::GetNumFields(lldb::opaque_compiler_type_t type) {
if (!type)
  return 0;

uint32_t count = 0;
clang::QualType qual_type(RemoveWrappingTypes(GetCanonicalQualType(type)));
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Record:
  if (GetCompleteType(type)) {
    const clang::RecordType *record_type =
        llvm::dyn_cast<clang::RecordType>(qual_type.getTypePtr());
    if (record_type) {
      clang::RecordDecl *record_decl = record_type->getDecl();
      if (record_decl) {
        uint32_t field_idx = 0;
        clang::RecordDecl::field_iterator field, field_end;
        for (field = record_decl->field_begin(),
            field_end = record_decl->field_end();
             field != field_end; ++field)
          ++field_idx;
        count = field_idx;
      }
    }
  }
  break;

case clang::Type::ObjCObjectPointer: {
  const clang::ObjCObjectPointerType *objc_class_type =
      qual_type->getAs<clang::ObjCObjectPointerType>();
  const clang::ObjCInterfaceType *objc_interface_type =
      objc_class_type->getInterfaceType();
  if (objc_interface_type &&
      GetCompleteType(static_cast<lldb::opaque_compiler_type_t>(
          const_cast<clang::ObjCInterfaceType *>(objc_interface_type)))) {
    clang::ObjCInterfaceDecl *class_interface_decl =
        objc_interface_type->getDecl();
    if (class_interface_decl) {
      count = class_interface_decl->ivar_size();
    }
  }
  break;
}

case clang::Type::ObjCObject:
case clang::Type::ObjCInterface:
  if (GetCompleteType(type)) {
    const clang::ObjCObjectType *objc_class_type =
        llvm::dyn_cast<clang::ObjCObjectType>(qual_type.getTypePtr());
    if (objc_class_type) {
      clang::ObjCInterfaceDecl *class_interface_decl =
          objc_class_type->getInterface();

      if (class_interface_decl)
        count = class_interface_decl->ivar_size();
    }
  }
  break;

default:
  break;
}
return count;
5599}

5601static lldb::opaque_compiler_type_t
5602GetObjCFieldAtIndex(clang::ASTContext *ast,
                  clang::ObjCInterfaceDecl *class_interface_decl, size_t idx,
                  std::string &name, uint64_t *bit_offset_ptr,
                  uint32_t *bitfield_bit_size_ptr, bool *is_bitfield_ptr) {
if (class_interface_decl) {
  if (idx < (class_interface_decl->ivar_size())) {
    clang::ObjCInterfaceDecl::ivar_iterator ivar_pos,
        ivar_end = class_interface_decl->ivar_end();
    uint32_t ivar_idx = 0;

    for (ivar_pos = class_interface_decl->ivar_begin(); ivar_pos != ivar_end;
         ++ivar_pos, ++ivar_idx) {
      if (ivar_idx == idx) {
        const clang::ObjCIvarDecl *ivar_decl = *ivar_pos;

        clang::QualType ivar_qual_type(ivar_decl->getType());

        name.assign(ivar_decl->getNameAsString());

        if (bit_offset_ptr) {
          const clang::ASTRecordLayout &interface_layout =
              ast->getASTObjCInterfaceLayout(class_interface_decl);
          *bit_offset_ptr = interface_layout.getFieldOffset(ivar_idx);
        }

        const bool is_bitfield = ivar_pos->isBitField();

        if (bitfield_bit_size_ptr) {
          *bitfield_bit_size_ptr = 0;

          if (is_bitfield && ast) {
            clang::Expr *bitfield_bit_size_expr = ivar_pos->getBitWidth();
            clang::Expr::EvalResult result;
            if (bitfield_bit_size_expr &&
                bitfield_bit_size_expr->EvaluateAsInt(result, *ast)) {
              llvm::APSInt bitfield_apsint = result.Val.getInt();
              *bitfield_bit_size_ptr = bitfield_apsint.getLimitedValue();
            }
          }
        }
        if (is_bitfield_ptr)
          *is_bitfield_ptr = is_bitfield;

        return ivar_qual_type.getAsOpaquePtr();
      }
    }
  }
}
return nullptr;
5651}

5653CompilerType TypeSystemClang::GetFieldAtIndex(lldb::opaque_compiler_type_t type,
                                            size_t idx, std::string &name,
                                            uint64_t *bit_offset_ptr,
                                            uint32_t *bitfield_bit_size_ptr,
                                            bool *is_bitfield_ptr) {
if (!type)
  return CompilerType();

clang::QualType qual_type(RemoveWrappingTypes(GetCanonicalQualType(type)));
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Record:
  if (GetCompleteType(type)) {
    const clang::RecordType *record_type =
        llvm::cast<clang::RecordType>(qual_type.getTypePtr());
    const clang::RecordDecl *record_decl = record_type->getDecl();
    uint32_t field_idx = 0;
    clang::RecordDecl::field_iterator field, field_end;
    for (field = record_decl->field_begin(),
        field_end = record_decl->field_end();
         field != field_end; ++field, ++field_idx) {
      if (idx == field_idx) {
        // Print the member type if requested
        // Print the member name and equal sign
        name.assign(field->getNameAsString());

        // Figure out the type byte size (field_type_info.first) and
        // alignment (field_type_info.second) from the AST context.
        if (bit_offset_ptr) {
          const clang::ASTRecordLayout &record_layout =
              getASTContext().getASTRecordLayout(record_decl);
          *bit_offset_ptr = record_layout.getFieldOffset(field_idx);
        }

        const bool is_bitfield = field->isBitField();

        if (bitfield_bit_size_ptr) {
          *bitfield_bit_size_ptr = 0;

          if (is_bitfield) {
            clang::Expr *bitfield_bit_size_expr = field->getBitWidth();
            clang::Expr::EvalResult result;
            if (bitfield_bit_size_expr &&
                bitfield_bit_size_expr->EvaluateAsInt(result,
                                                      getASTContext())) {
              llvm::APSInt bitfield_apsint = result.Val.getInt();
              *bitfield_bit_size_ptr = bitfield_apsint.getLimitedValue();
            }
          }
        }
        if (is_bitfield_ptr)
          *is_bitfield_ptr = is_bitfield;

        return GetType(field->getType());
      }
    }
  }
  break;

case clang::Type::ObjCObjectPointer: {
  const clang::ObjCObjectPointerType *objc_class_type =
      qual_type->getAs<clang::ObjCObjectPointerType>();
  const clang::ObjCInterfaceType *objc_interface_type =
      objc_class_type->getInterfaceType();
  if (objc_interface_type &&
      GetCompleteType(static_cast<lldb::opaque_compiler_type_t>(
          const_cast<clang::ObjCInterfaceType *>(objc_interface_type)))) {
    clang::ObjCInterfaceDecl *class_interface_decl =
        objc_interface_type->getDecl();
    if (class_interface_decl) {
      return CompilerType(
          this, GetObjCFieldAtIndex(&getASTContext(), class_interface_decl,
                                    idx, name, bit_offset_ptr,
                                    bitfield_bit_size_ptr, is_bitfield_ptr));
    }
  }
  break;
}

case clang::Type::ObjCObject:
case clang::Type::ObjCInterface:
  if (GetCompleteType(type)) {
    const clang::ObjCObjectType *objc_class_type =
        llvm::dyn_cast<clang::ObjCObjectType>(qual_type.getTypePtr());
    assert(objc_class_type)((void)0);
    if (objc_class_type) {
      clang::ObjCInterfaceDecl *class_interface_decl =
          objc_class_type->getInterface();
      return CompilerType(
          this, GetObjCFieldAtIndex(&getASTContext(), class_interface_decl,
                                    idx, name, bit_offset_ptr,
                                    bitfield_bit_size_ptr, is_bitfield_ptr));
    }
  }
  break;

default:
  break;
}
return CompilerType();
5753}

5755uint32_t
5756TypeSystemClang::GetNumDirectBaseClasses(lldb::opaque_compiler_type_t type) {
uint32_t count = 0;
clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Record:
  if (GetCompleteType(type)) {
    const clang::CXXRecordDecl *cxx_record_decl =
        qual_type->getAsCXXRecordDecl();
    if (cxx_record_decl)
      count = cxx_record_decl->getNumBases();
  }
  break;

case clang::Type::ObjCObjectPointer:
  count = GetPointeeType(type).GetNumDirectBaseClasses();
  break;

case clang::Type::ObjCObject:
  if (GetCompleteType(type)) {
    const clang::ObjCObjectType *objc_class_type =
        qual_type->getAsObjCQualifiedInterfaceType();
    if (objc_class_type) {
      clang::ObjCInterfaceDecl *class_interface_decl =
          objc_class_type->getInterface();

      if (class_interface_decl && class_interface_decl->getSuperClass())
        count = 1;
    }
  }
  break;
case clang::Type::ObjCInterface:
  if (GetCompleteType(type)) {
    const clang::ObjCInterfaceType *objc_interface_type =
        qual_type->getAs<clang::ObjCInterfaceType>();
    if (objc_interface_type) {
      clang::ObjCInterfaceDecl *class_interface_decl =
          objc_interface_type->getInterface();

      if (class_interface_decl && class_interface_decl->getSuperClass())
        count = 1;
    }
  }
  break;

default:
  break;
}
return count;
5805}

5807uint32_t
5808TypeSystemClang::GetNumVirtualBaseClasses(lldb::opaque_compiler_type_t type) {
uint32_t count = 0;
clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Record:
  if (GetCompleteType(type)) {
    const clang::CXXRecordDecl *cxx_record_decl =
        qual_type->getAsCXXRecordDecl();
    if (cxx_record_decl)
      count = cxx_record_decl->getNumVBases();
  }
  break;

default:
  break;
}
return count;
5826}

5828CompilerType TypeSystemClang::GetDirectBaseClassAtIndex(
  lldb::opaque_compiler_type_t type, size_t idx, uint32_t *bit_offset_ptr) {
clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Record:
  if (GetCompleteType(type)) {
    const clang::CXXRecordDecl *cxx_record_decl =
        qual_type->getAsCXXRecordDecl();
    if (cxx_record_decl) {
      uint32_t curr_idx = 0;
      clang::CXXRecordDecl::base_class_const_iterator base_class,
          base_class_end;
      for (base_class = cxx_record_decl->bases_begin(),
          base_class_end = cxx_record_decl->bases_end();
           base_class != base_class_end; ++base_class, ++curr_idx) {
        if (curr_idx == idx) {
          if (bit_offset_ptr) {
            const clang::ASTRecordLayout &record_layout =
                getASTContext().getASTRecordLayout(cxx_record_decl);
            const clang::CXXRecordDecl *base_class_decl =
                llvm::cast<clang::CXXRecordDecl>(
                    base_class->getType()
                        ->getAs<clang::RecordType>()
                        ->getDecl());
            if (base_class->isVirtual())
              *bit_offset_ptr =
                  record_layout.getVBaseClassOffset(base_class_decl)
                      .getQuantity() *
                  8;
            else
              *bit_offset_ptr =
                  record_layout.getBaseClassOffset(base_class_decl)
                      .getQuantity() *
                  8;
          }
          return GetType(base_class->getType());
        }
      }
    }
  }
  break;

case clang::Type::ObjCObjectPointer:
  return GetPointeeType(type).GetDirectBaseClassAtIndex(idx, bit_offset_ptr);

case clang::Type::ObjCObject:
  if (idx == 0 && GetCompleteType(type)) {
    const clang::ObjCObjectType *objc_class_type =
        qual_type->getAsObjCQualifiedInterfaceType();
    if (objc_class_type) {
      clang::ObjCInterfaceDecl *class_interface_decl =
          objc_class_type->getInterface();

      if (class_interface_decl) {
        clang::ObjCInterfaceDecl *superclass_interface_decl =
            class_interface_decl->getSuperClass();
        if (superclass_interface_decl) {
          if (bit_offset_ptr)
            *bit_offset_ptr = 0;
          return GetType(getASTContext().getObjCInterfaceType(
              superclass_interface_decl));
        }
      }
    }
  }
  break;
case clang::Type::ObjCInterface:
  if (idx == 0 && GetCompleteType(type)) {
    const clang::ObjCObjectType *objc_interface_type =
        qual_type->getAs<clang::ObjCInterfaceType>();
    if (objc_interface_type) {
      clang::ObjCInterfaceDecl *class_interface_decl =
          objc_interface_type->getInterface();

      if (class_interface_decl) {
        clang::ObjCInterfaceDecl *superclass_interface_decl =
            class_interface_decl->getSuperClass();
        if (superclass_interface_decl) {
          if (bit_offset_ptr)
            *bit_offset_ptr = 0;
          return GetType(getASTContext().getObjCInterfaceType(
              superclass_interface_decl));
        }
      }
    }
  }
  break;

default:
  break;
}
return CompilerType();
5921}

5923CompilerType TypeSystemClang::GetVirtualBaseClassAtIndex(
  lldb::opaque_compiler_type_t type, size_t idx, uint32_t *bit_offset_ptr) {
clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Record:
  if (GetCompleteType(type)) {
    const clang::CXXRecordDecl *cxx_record_decl =
        qual_type->getAsCXXRecordDecl();
    if (cxx_record_decl) {
      uint32_t curr_idx = 0;
      clang::CXXRecordDecl::base_class_const_iterator base_class,
          base_class_end;
      for (base_class = cxx_record_decl->vbases_begin(),
          base_class_end = cxx_record_decl->vbases_end();
           base_class != base_class_end; ++base_class, ++curr_idx) {
        if (curr_idx == idx) {
          if (bit_offset_ptr) {
            const clang::ASTRecordLayout &record_layout =
                getASTContext().getASTRecordLayout(cxx_record_decl);
            const clang::CXXRecordDecl *base_class_decl =
                llvm::cast<clang::CXXRecordDecl>(
                    base_class->getType()
                        ->getAs<clang::RecordType>()
                        ->getDecl());
            *bit_offset_ptr =
                record_layout.getVBaseClassOffset(base_class_decl)
                    .getQuantity() *
                8;
          }
          return GetType(base_class->getType());
        }
      }
    }
  }
  break;

default:
  break;
}
return CompilerType();
5964}

5966// If a pointer to a pointee type (the clang_type arg) says that it has no
5967// children, then we either need to trust it, or override it and return a
5968// different result. For example, an "int *" has one child that is an integer,
5969// but a function pointer doesn't have any children. Likewise if a Record type
5970// claims it has no children, then there really is nothing to show.
5971uint32_t TypeSystemClang::GetNumPointeeChildren(clang::QualType type) {
if (type.isNull())
  return 0;

clang::QualType qual_type = RemoveWrappingTypes(type.getCanonicalType());
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Builtin:
  switch (llvm::cast<clang::BuiltinType>(qual_type)->getKind()) {
  case clang::BuiltinType::UnknownAny:
  case clang::BuiltinType::Void:
  case clang::BuiltinType::NullPtr:
  case clang::BuiltinType::OCLEvent:
  case clang::BuiltinType::OCLImage1dRO:
  case clang::BuiltinType::OCLImage1dWO:
  case clang::BuiltinType::OCLImage1dRW:
  case clang::BuiltinType::OCLImage1dArrayRO:
  case clang::BuiltinType::OCLImage1dArrayWO:
  case clang::BuiltinType::OCLImage1dArrayRW:
  case clang::BuiltinType::OCLImage1dBufferRO:
  case clang::BuiltinType::OCLImage1dBufferWO:
  case clang::BuiltinType::OCLImage1dBufferRW:
  case clang::BuiltinType::OCLImage2dRO:
  case clang::BuiltinType::OCLImage2dWO:
  case clang::BuiltinType::OCLImage2dRW:
  case clang::BuiltinType::OCLImage2dArrayRO:
  case clang::BuiltinType::OCLImage2dArrayWO:
  case clang::BuiltinType::OCLImage2dArrayRW:
  case clang::BuiltinType::OCLImage3dRO:
  case clang::BuiltinType::OCLImage3dWO:
  case clang::BuiltinType::OCLImage3dRW:
  case clang::BuiltinType::OCLSampler:
    return 0;
  case clang::BuiltinType::Bool:
  case clang::BuiltinType::Char_U:
  case clang::BuiltinType::UChar:
  case clang::BuiltinType::WChar_U:
  case clang::BuiltinType::Char16:
  case clang::BuiltinType::Char32:
  case clang::BuiltinType::UShort:
  case clang::BuiltinType::UInt:
  case clang::BuiltinType::ULong:
  case clang::BuiltinType::ULongLong:
  case clang::BuiltinType::UInt128:
  case clang::BuiltinType::Char_S:
  case clang::BuiltinType::SChar:
  case clang::BuiltinType::WChar_S:
  case clang::BuiltinType::Short:
  case clang::BuiltinType::Int:
  case clang::BuiltinType::Long:
  case clang::BuiltinType::LongLong:
  case clang::BuiltinType::Int128:
  case clang::BuiltinType::Float:
  case clang::BuiltinType::Double:
  case clang::BuiltinType::LongDouble:
  case clang::BuiltinType::Dependent:
  case clang::BuiltinType::Overload:
  case clang::BuiltinType::ObjCId:
  case clang::BuiltinType::ObjCClass:
  case clang::BuiltinType::ObjCSel:
  case clang::BuiltinType::BoundMember:
  case clang::BuiltinType::Half:
  case clang::BuiltinType::ARCUnbridgedCast:
  case clang::BuiltinType::PseudoObject:
  case clang::BuiltinType::BuiltinFn:
  case clang::BuiltinType::OMPArraySection:
    return 1;
  default:
    return 0;
  }
  break;

case clang::Type::Complex:
  return 1;
case clang::Type::Pointer:
  return 1;
case clang::Type::BlockPointer:
  return 0; // If block pointers don't have debug info, then no children for
            // them
case clang::Type::LValueReference:
  return 1;
case clang::Type::RValueReference:
  return 1;
case clang::Type::MemberPointer:
  return 0;
case clang::Type::ConstantArray:
  return 0;
case clang::Type::IncompleteArray:
  return 0;
case clang::Type::VariableArray:
  return 0;
case clang::Type::DependentSizedArray:
  return 0;
case clang::Type::DependentSizedExtVector:
  return 0;
case clang::Type::Vector:
  return 0;
case clang::Type::ExtVector:
  return 0;
case clang::Type::FunctionProto:
  return 0; // When we function pointers, they have no children...
case clang::Type::FunctionNoProto:
  return 0; // When we function pointers, they have no children...
case clang::Type::UnresolvedUsing:
  return 0;
case clang::Type::Record:
  return 0;
case clang::Type::Enum:
  return 1;
case clang::Type::TemplateTypeParm:
  return 1;
case clang::Type::SubstTemplateTypeParm:
  return 1;
case clang::Type::TemplateSpecialization:
  return 1;
case clang::Type::InjectedClassName:
  return 0;
case clang::Type::DependentName:
  return 1;
case clang::Type::DependentTemplateSpecialization:
  return 1;
case clang::Type::ObjCObject:
  return 0;
case clang::Type::ObjCInterface:
  return 0;
case clang::Type::ObjCObjectPointer:
  return 1;
default:
  break;
}
return 0;
6102}

6104CompilerType TypeSystemClang::GetChildCompilerTypeAtIndex(
  lldb::opaque_compiler_type_t type, ExecutionContext *exe_ctx, size_t idx,
  bool transparent_pointers, bool omit_empty_base_classes,
  bool ignore_array_bounds, std::string &child_name,
  uint32_t &child_byte_size, int32_t &child_byte_offset,
  uint32_t &child_bitfield_bit_size, uint32_t &child_bitfield_bit_offset,
  bool &child_is_base_class, bool &child_is_deref_of_parent,
  ValueObject *valobj, uint64_t &language_flags) {
if (!type)
  return CompilerType();

auto get_exe_scope = [&exe_ctx]() {
  return exe_ctx ? exe_ctx->GetBestExecutionContextScope() : nullptr;
};

clang::QualType parent_qual_type(
    RemoveWrappingTypes(GetCanonicalQualType(type)));
const clang::Type::TypeClass parent_type_class =
    parent_qual_type->getTypeClass();
child_bitfield_bit_size = 0;
child_bitfield_bit_offset = 0;
child_is_base_class = false;
language_flags = 0;

const bool idx_is_valid =
    idx < GetNumChildren(type, omit_empty_base_classes, exe_ctx);
int32_t bit_offset;
switch (parent_type_class) {
case clang::Type::Builtin:
  if (idx_is_valid) {
    switch (llvm::cast<clang::BuiltinType>(parent_qual_type)->getKind()) {
    case clang::BuiltinType::ObjCId:
    case clang::BuiltinType::ObjCClass:
      child_name = "isa";
      child_byte_size =
          getASTContext().getTypeSize(getASTContext().ObjCBuiltinClassTy) /
          CHAR_BIT8;
      return GetType(getASTContext().ObjCBuiltinClassTy);

    default:
      break;
    }
  }
  break;

case clang::Type::Record:
  if (idx_is_valid && GetCompleteType(type)) {
    const clang::RecordType *record_type =
        llvm::cast<clang::RecordType>(parent_qual_type.getTypePtr());
    const clang::RecordDecl *record_decl = record_type->getDecl();
    assert(record_decl)((void)0);
    const clang::ASTRecordLayout &record_layout =
        getASTContext().getASTRecordLayout(record_decl);
    uint32_t child_idx = 0;

    const clang::CXXRecordDecl *cxx_record_decl =
        llvm::dyn_cast<clang::CXXRecordDecl>(record_decl);
    if (cxx_record_decl) {
      // We might have base classes to print out first
      clang::CXXRecordDecl::base_class_const_iterator base_class,
          base_class_end;
      for (base_class = cxx_record_decl->bases_begin(),
          base_class_end = cxx_record_decl->bases_end();
           base_class != base_class_end; ++base_class) {
        const clang::CXXRecordDecl *base_class_decl = nullptr;

        // Skip empty base classes
        if (omit_empty_base_classes) {
          base_class_decl = llvm::cast<clang::CXXRecordDecl>(
              base_class->getType()->getAs<clang::RecordType>()->getDecl());
          if (!TypeSystemClang::RecordHasFields(base_class_decl))
            continue;
        }

        if (idx == child_idx) {
          if (base_class_decl == nullptr)
            base_class_decl = llvm::cast<clang::CXXRecordDecl>(
                base_class->getType()->getAs<clang::RecordType>()->getDecl());

          if (base_class->isVirtual()) {
            bool handled = false;
            if (valobj) {
              clang::VTableContextBase *vtable_ctx =
                  getASTContext().getVTableContext();
              if (vtable_ctx)
                handled = GetVBaseBitOffset(*vtable_ctx, *valobj,
                                            record_layout, cxx_record_decl,
                                            base_class_decl, bit_offset);
            }
            if (!handled)
              bit_offset = record_layout.getVBaseClassOffset(base_class_decl)
                               .getQuantity() *
                           8;
          } else
            bit_offset = record_layout.getBaseClassOffset(base_class_decl)
                             .getQuantity() *
                         8;

          // Base classes should be a multiple of 8 bits in size
          child_byte_offset = bit_offset / 8;
          CompilerType base_class_clang_type = GetType(base_class->getType());
          child_name = base_class_clang_type.GetTypeName().AsCString("");
          Optional<uint64_t> size =
              base_class_clang_type.GetBitSize(get_exe_scope());
          if (!size)
            return {};
          uint64_t base_class_clang_type_bit_size = *size;

          // Base classes bit sizes should be a multiple of 8 bits in size
          assert(base_class_clang_type_bit_size % 8 == 0)((void)0);
          child_byte_size = base_class_clang_type_bit_size / 8;
          child_is_base_class = true;
          return base_class_clang_type;
        }
        // We don't increment the child index in the for loop since we might
        // be skipping empty base classes
        ++child_idx;
      }
    }
    // Make sure index is in range...
    uint32_t field_idx = 0;
    clang::RecordDecl::field_iterator field, field_end;
    for (field = record_decl->field_begin(),
        field_end = record_decl->field_end();
         field != field_end; ++field, ++field_idx, ++child_idx) {
      if (idx == child_idx) {
        // Print the member type if requested
        // Print the member name and equal sign
        child_name.assign(field->getNameAsString());

        // Figure out the type byte size (field_type_info.first) and
        // alignment (field_type_info.second) from the AST context.
        CompilerType field_clang_type = GetType(field->getType());
        assert(field_idx < record_layout.getFieldCount())((void)0);
        Optional<uint64_t> size =
            field_clang_type.GetByteSize(get_exe_scope());
        if (!size)
          return {};
        child_byte_size = *size;
        const uint32_t child_bit_size = child_byte_size * 8;

        // Figure out the field offset within the current struct/union/class
        // type
        bit_offset = record_layout.getFieldOffset(field_idx);
        if (FieldIsBitfield(*field, child_bitfield_bit_size)) {
          child_bitfield_bit_offset = bit_offset % child_bit_size;
          const uint32_t child_bit_offset =
              bit_offset - child_bitfield_bit_offset;
          child_byte_offset = child_bit_offset / 8;
        } else {
          child_byte_offset = bit_offset / 8;
        }

        return field_clang_type;
      }
    }
  }
  break;

case clang::Type::ObjCObject:
case clang::Type::ObjCInterface:
  if (idx_is_valid && GetCompleteType(type)) {
    const clang::ObjCObjectType *objc_class_type =
        llvm::dyn_cast<clang::ObjCObjectType>(parent_qual_type.getTypePtr());
    assert(objc_class_type)((void)0);
    if (objc_class_type) {
      uint32_t child_idx = 0;
      clang::ObjCInterfaceDecl *class_interface_decl =
          objc_class_type->getInterface();

      if (class_interface_decl) {

        const clang::ASTRecordLayout &interface_layout =
            getASTContext().getASTObjCInterfaceLayout(class_interface_decl);
        clang::ObjCInterfaceDecl *superclass_interface_decl =
            class_interface_decl->getSuperClass();
        if (superclass_interface_decl) {
          if (omit_empty_base_classes) {
            CompilerType base_class_clang_type =
                GetType(getASTContext().getObjCInterfaceType(
                    superclass_interface_decl));
            if (base_class_clang_type.GetNumChildren(omit_empty_base_classes,
                                                     exe_ctx) > 0) {
              if (idx == 0) {
                clang::QualType ivar_qual_type(
                    getASTContext().getObjCInterfaceType(
                        superclass_interface_decl));

                child_name.assign(
                    superclass_interface_decl->getNameAsString());

                clang::TypeInfo ivar_type_info =
                    getASTContext().getTypeInfo(ivar_qual_type.getTypePtr());

                child_byte_size = ivar_type_info.Width / 8;
                child_byte_offset = 0;
                child_is_base_class = true;

                return GetType(ivar_qual_type);
              }

              ++child_idx;
            }
          } else
            ++child_idx;
        }

        const uint32_t superclass_idx = child_idx;

        if (idx < (child_idx + class_interface_decl->ivar_size())) {
          clang::ObjCInterfaceDecl::ivar_iterator ivar_pos,
              ivar_end = class_interface_decl->ivar_end();

          for (ivar_pos = class_interface_decl->ivar_begin();
               ivar_pos != ivar_end; ++ivar_pos) {
            if (child_idx == idx) {
              clang::ObjCIvarDecl *ivar_decl = *ivar_pos;

              clang::QualType ivar_qual_type(ivar_decl->getType());

              child_name.assign(ivar_decl->getNameAsString());

              clang::TypeInfo ivar_type_info =
                  getASTContext().getTypeInfo(ivar_qual_type.getTypePtr());

              child_byte_size = ivar_type_info.Width / 8;

              // Figure out the field offset within the current
              // struct/union/class type For ObjC objects, we can't trust the
              // bit offset we get from the Clang AST, since that doesn't
              // account for the space taken up by unbacked properties, or
              // from the changing size of base classes that are newer than
              // this class. So if we have a process around that we can ask
              // about this object, do so.
              child_byte_offset = LLDB_INVALID_IVAR_OFFSET0xffffffffU;
              Process *process = nullptr;
              if (exe_ctx)
                process = exe_ctx->GetProcessPtr();
              if (process) {
                ObjCLanguageRuntime *objc_runtime =
                    ObjCLanguageRuntime::Get(*process);
                if (objc_runtime != nullptr) {
                  CompilerType parent_ast_type = GetType(parent_qual_type);
                  child_byte_offset = objc_runtime->GetByteOffsetForIvar(
                      parent_ast_type, ivar_decl->getNameAsString().c_str());
                }
              }

              // Setting this to INT32_MAX to make sure we don't compute it
              // twice...
              bit_offset = INT32_MAX0x7fffffff;

              if (child_byte_offset ==
                  static_cast<int32_t>(LLDB_INVALID_IVAR_OFFSET0xffffffffU)) {
                bit_offset = interface_layout.getFieldOffset(child_idx -
                                                             superclass_idx);
                child_byte_offset = bit_offset / 8;
              }

              // Note, the ObjC Ivar Byte offset is just that, it doesn't
              // account for the bit offset of a bitfield within its
              // containing object.  So regardless of where we get the byte
              // offset from, we still need to get the bit offset for
              // bitfields from the layout.

              if (FieldIsBitfield(ivar_decl, child_bitfield_bit_size)) {
                if (bit_offset == INT32_MAX0x7fffffff)
                  bit_offset = interface_layout.getFieldOffset(
                      child_idx - superclass_idx);

                child_bitfield_bit_offset = bit_offset % 8;
              }
              return GetType(ivar_qual_type);
            }
            ++child_idx;
          }
        }
      }
    }
  }
  break;

case clang::Type::ObjCObjectPointer:
  if (idx_is_valid) {
    CompilerType pointee_clang_type(GetPointeeType(type));

    if (transparent_pointers && pointee_clang_type.IsAggregateType()) {
      child_is_deref_of_parent = false;
      bool tmp_child_is_deref_of_parent = false;
      return pointee_clang_type.GetChildCompilerTypeAtIndex(
          exe_ctx, idx, transparent_pointers, omit_empty_base_classes,
          ignore_array_bounds, child_name, child_byte_size, child_byte_offset,
          child_bitfield_bit_size, child_bitfield_bit_offset,
          child_is_base_class, tmp_child_is_deref_of_parent, valobj,
          language_flags);
    } else {
      child_is_deref_of_parent = true;
      const char *parent_name =
          valobj ? valobj->GetName().GetCString() : nullptr;
      if (parent_name) {
        child_name.assign(1, '*');
        child_name += parent_name;
      }

      // We have a pointer to an simple type
      if (idx == 0 && pointee_clang_type.GetCompleteType()) {
        if (Optional<uint64_t> size =
                pointee_clang_type.GetByteSize(get_exe_scope())) {
          child_byte_size = *size;
          child_byte_offset = 0;
          return pointee_clang_type;
        }
      }
    }
  }
  break;

case clang::Type::Vector:
case clang::Type::ExtVector:
  if (idx_is_valid) {
    const clang::VectorType *array =
        llvm::cast<clang::VectorType>(parent_qual_type.getTypePtr());
    if (array) {
      CompilerType element_type = GetType(array->getElementType());
      if (element_type.GetCompleteType()) {
        char element_name[64];
        ::snprintf(element_name, sizeof(element_name), "[%" PRIu64"llu" "]",
                   static_cast<uint64_t>(idx));
        child_name.assign(element_name);
        if (Optional<uint64_t> size =
                element_type.GetByteSize(get_exe_scope())) {
          child_byte_size = *size;
          child_byte_offset = (int32_t)idx * (int32_t)child_byte_size;
          return element_type;
        }
      }
    }
  }
  break;

case clang::Type::ConstantArray:
case clang::Type::IncompleteArray:
  if (ignore_array_bounds || idx_is_valid) {
    const clang::ArrayType *array = GetQualType(type)->getAsArrayTypeUnsafe();
    if (array) {
      CompilerType element_type = GetType(array->getElementType());
      if (element_type.GetCompleteType()) {
        child_name = std::string(llvm::formatv("[{0}]", idx));
        if (Optional<uint64_t> size =
                element_type.GetByteSize(get_exe_scope())) {
          child_byte_size = *size;
          child_byte_offset = (int32_t)idx * (int32_t)child_byte_size;
          return element_type;
        }
      }
    }
  }
  break;

case clang::Type::Pointer: {
  CompilerType pointee_clang_type(GetPointeeType(type));

  // Don't dereference "void *" pointers
  if (pointee_clang_type.IsVoidType())
    return CompilerType();

  if (transparent_pointers && pointee_clang_type.IsAggregateType()) {
    child_is_deref_of_parent = false;
    bool tmp_child_is_deref_of_parent = false;
    return pointee_clang_type.GetChildCompilerTypeAtIndex(
        exe_ctx, idx, transparent_pointers, omit_empty_base_classes,
        ignore_array_bounds, child_name, child_byte_size, child_byte_offset,
        child_bitfield_bit_size, child_bitfield_bit_offset,
        child_is_base_class, tmp_child_is_deref_of_parent, valobj,
        language_flags);
  } else {
    child_is_deref_of_parent = true;

    const char *parent_name =
        valobj ? valobj->GetName().GetCString() : nullptr;
    if (parent_name) {
      child_name.assign(1, '*');
      child_name += parent_name;
    }

    // We have a pointer to an simple type
    if (idx == 0) {
      if (Optional<uint64_t> size =
              pointee_clang_type.GetByteSize(get_exe_scope())) {
        child_byte_size = *size;
        child_byte_offset = 0;
        return pointee_clang_type;
      }
    }
  }
  break;
}

case clang::Type::LValueReference:
case clang::Type::RValueReference:
  if (idx_is_valid) {
    const clang::ReferenceType *reference_type =
        llvm::cast<clang::ReferenceType>(GetQualType(type).getTypePtr());
    CompilerType pointee_clang_type =
        GetType(reference_type->getPointeeType());
    if (transparent_pointers && pointee_clang_type.IsAggregateType()) {
      child_is_deref_of_parent = false;
      bool tmp_child_is_deref_of_parent = false;
      return pointee_clang_type.GetChildCompilerTypeAtIndex(
          exe_ctx, idx, transparent_pointers, omit_empty_base_classes,
          ignore_array_bounds, child_name, child_byte_size, child_byte_offset,
          child_bitfield_bit_size, child_bitfield_bit_offset,
          child_is_base_class, tmp_child_is_deref_of_parent, valobj,
          language_flags);
    } else {
      const char *parent_name =
          valobj ? valobj->GetName().GetCString() : nullptr;
      if (parent_name) {
        child_name.assign(1, '&');
        child_name += parent_name;
      }

      // We have a pointer to an simple type
      if (idx == 0) {
        if (Optional<uint64_t> size =
                pointee_clang_type.GetByteSize(get_exe_scope())) {
          child_byte_size = *size;
          child_byte_offset = 0;
          return pointee_clang_type;
        }
      }
    }
  }
  break;

default:
  break;
}
return CompilerType();
6543}

6545static uint32_t GetIndexForRecordBase(const clang::RecordDecl *record_decl,
                                    const clang::CXXBaseSpecifier *base_spec,
                                    bool omit_empty_base_classes) {
uint32_t child_idx = 0;

const clang::CXXRecordDecl *cxx_record_decl =
    llvm::dyn_cast<clang::CXXRecordDecl>(record_decl);

if (cxx_record_decl) {
  clang::CXXRecordDecl::base_class_const_iterator base_class, base_class_end;
  for (base_class = cxx_record_decl->bases_begin(),
      base_class_end = cxx_record_decl->bases_end();
       base_class != base_class_end; ++base_class) {
    if (omit_empty_base_classes) {
      if (BaseSpecifierIsEmpty(base_class))
        continue;
    }

    if (base_class == base_spec)
      return child_idx;
    ++child_idx;
  }
}

return UINT32_MAX0xffffffffU;
6570}

6572static uint32_t GetIndexForRecordChild(const clang::RecordDecl *record_decl,
                                     clang::NamedDecl *canonical_decl,
                                     bool omit_empty_base_classes) {
uint32_t child_idx = TypeSystemClang::GetNumBaseClasses(
    llvm::dyn_cast<clang::CXXRecordDecl>(record_decl),
    omit_empty_base_classes);

clang::RecordDecl::field_iterator field, field_end;
for (field = record_decl->field_begin(), field_end = record_decl->field_end();
     field != field_end; ++field, ++child_idx) {
  if (field->getCanonicalDecl() == canonical_decl)
    return child_idx;
}

return UINT32_MAX0xffffffffU;
6587}

6589// Look for a child member (doesn't include base classes, but it does include
6590// their members) in the type hierarchy. Returns an index path into
6591// "clang_type" on how to reach the appropriate member.
6592//
6593//    class A
6594//    {
6595//    public:
6596//        int m_a;
6597//        int m_b;
6598//    };
6599//
6600//    class B
6601//    {
6602//    };
6603//
6604//    class C :
6605//        public B,
6606//        public A
6607//    {
6608//    };
6609//
6610// If we have a clang type that describes "class C", and we wanted to looked
6611// "m_b" in it:
6612//
6613// With omit_empty_base_classes == false we would get an integer array back
6614// with: { 1,  1 } The first index 1 is the child index for "class A" within
6615// class C The second index 1 is the child index for "m_b" within class A
6616//
6617// With omit_empty_base_classes == true we would get an integer array back
6618// with: { 0,  1 } The first index 0 is the child index for "class A" within
6619// class C (since class B doesn't have any members it doesn't count) The second
6620// index 1 is the child index for "m_b" within class A

6622size_t TypeSystemClang::GetIndexOfChildMemberWithName(
  lldb::opaque_compiler_type_t type, const char *name,
  bool omit_empty_base_classes, std::vector<uint32_t> &child_indexes) {
if (type && name && name[0]) {
1
Assuming 'type' is non-null→
2
←
Assuming 'name' is non-null→
3
←
Assuming the condition is true→
4
←
Taking true branch→
  clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));
  const clang::Type::TypeClass type_class = qual_type->getTypeClass();
  switch (type_class) {
5
←
Control jumps to 'case Record:'  at line 6629→
  case clang::Type::Record:
    if (GetCompleteType(type)) {
6
←
Assuming the condition is true→
7
←
Taking true branch→
      const clang::RecordType *record_type =
          llvm::cast<clang::RecordType>(qual_type.getTypePtr());
8
←
The object is a 'RecordType'→
      const clang::RecordDecl *record_decl = record_type->getDecl();

      assert(record_decl)((void)0);
      uint32_t child_idx = 0;

      const clang::CXXRecordDecl *cxx_record_decl =
          llvm::dyn_cast<clang::CXXRecordDecl>(record_decl);
9
←
Assuming 'record_decl' is a 'CXXRecordDecl'→

      // Try and find a field that matches NAME
      clang::RecordDecl::field_iterator field, field_end;
      llvm::StringRef name_sref(name);
      for (field = record_decl->field_begin(),
17
←
Loop condition is false. Execution continues on line 6665→
          field_end = record_decl->field_end();
           field != field_end; ++field, ++child_idx) {
10
←
Calling 'operator!='→
16
←
Returning from 'operator!='→
        llvm::StringRef field_name = field->getName();
        if (field_name.empty()) {
          CompilerType field_type = GetType(field->getType());
          child_indexes.push_back(child_idx);
          if (field_type.GetIndexOfChildMemberWithName(
                  name, omit_empty_base_classes, child_indexes))
            return child_indexes.size();
          child_indexes.pop_back();

        } else if (field_name.equals(name_sref)) {
          // We have to add on the number of base classes to this index!
          child_indexes.push_back(
              child_idx + TypeSystemClang::GetNumBaseClasses(
                              cxx_record_decl, omit_empty_base_classes));
          return child_indexes.size();
        }
      }

      if (cxx_record_decl17.1
'cxx_record_decl' is non-null
1
'cxx_record_decl' is non-null
1
'cxx_record_decl' is non-null
) {
18
←
Taking true branch→
        const clang::RecordDecl *parent_record_decl = cxx_record_decl;

        // Didn't find things easily, lets let clang do its thang...
        clang::IdentifierInfo &ident_ref =
            getASTContext().Idents.get(name_sref);
        clang::DeclarationName decl_name(&ident_ref);

        clang::CXXBasePaths paths;
        if (cxx_record_decl->lookupInBases(
19
←
Assuming the condition is true→
20
←
Taking true branch→
                [decl_name](const clang::CXXBaseSpecifier *specifier,
                            clang::CXXBasePath &path) {
                  CXXRecordDecl *record =
                    specifier->getType()->getAsCXXRecordDecl();
                  auto r = record->lookup(decl_name);
                  path.Decls = r.begin();
                  return !r.empty();
                },
                paths)) {
          clang::CXXBasePaths::const_paths_iterator path,
              path_end = paths.end();
          for (path = paths.begin(); path != path_end; ++path) {
21
←
Calling 'operator!='→
27
←
Returning from 'operator!='→
28
←
Loop condition is true.  Entering loop body→
            const size_t num_path_elements = path->size();
            for (size_t e = 0; e < num_path_elements; ++e) {
29
←
Assuming 'e' is < 'num_path_elements'→
30
←
Loop condition is true.  Entering loop body→
              clang::CXXBasePathElement elem = (*path)[e];

              child_idx = GetIndexForRecordBase(parent_record_decl, elem.Base,
                                                omit_empty_base_classes);
              if (child_idx30.1
'child_idx' is not equal to UINT32_MAX
1
'child_idx' is not equal to UINT32_MAX
1
'child_idx' is not equal to UINT32_MAX
 == UINT32_MAX0xffffffffU) {
31
←
Taking false branch→
                child_indexes.clear();
                return 0;
              } else {
                child_indexes.push_back(child_idx);
                parent_record_decl = llvm::cast<clang::RecordDecl>(
                    elem.Base->getType()
32
←
Assuming the object is not a 'RecordType'→
33
←
Called C++ object pointer is null
                        ->getAs<clang::RecordType>()
                        ->getDecl());
              }
            }
            for (clang::DeclContext::lookup_iterator I = path->Decls, E;
                 I != E; ++I) {
              child_idx = GetIndexForRecordChild(
                  parent_record_decl, *I, omit_empty_base_classes);
              if (child_idx == UINT32_MAX0xffffffffU) {
                child_indexes.clear();
                return 0;
              } else {
                child_indexes.push_back(child_idx);
              }
            }
          }
          return child_indexes.size();
        }
      }
    }
    break;

  case clang::Type::ObjCObject:
  case clang::Type::ObjCInterface:
    if (GetCompleteType(type)) {
      llvm::StringRef name_sref(name);
      const clang::ObjCObjectType *objc_class_type =
          llvm::dyn_cast<clang::ObjCObjectType>(qual_type.getTypePtr());
      assert(objc_class_type)((void)0);
      if (objc_class_type) {
        uint32_t child_idx = 0;
        clang::ObjCInterfaceDecl *class_interface_decl =
            objc_class_type->getInterface();

        if (class_interface_decl) {
          clang::ObjCInterfaceDecl::ivar_iterator ivar_pos,
              ivar_end = class_interface_decl->ivar_end();
          clang::ObjCInterfaceDecl *superclass_interface_decl =
              class_interface_decl->getSuperClass();

          for (ivar_pos = class_interface_decl->ivar_begin();
               ivar_pos != ivar_end; ++ivar_pos, ++child_idx) {
            const clang::ObjCIvarDecl *ivar_decl = *ivar_pos;

            if (ivar_decl->getName().equals(name_sref)) {
              if ((!omit_empty_base_classes && superclass_interface_decl) ||
                  (omit_empty_base_classes &&
                   ObjCDeclHasIVars(superclass_interface_decl, true)))
                ++child_idx;

              child_indexes.push_back(child_idx);
              return child_indexes.size();
            }
          }

          if (superclass_interface_decl) {
            // The super class index is always zero for ObjC classes, so we
            // push it onto the child indexes in case we find an ivar in our
            // superclass...
            child_indexes.push_back(0);

            CompilerType superclass_clang_type =
                GetType(getASTContext().getObjCInterfaceType(
                    superclass_interface_decl));
            if (superclass_clang_type.GetIndexOfChildMemberWithName(
                    name, omit_empty_base_classes, child_indexes)) {
              // We did find an ivar in a superclass so just return the
              // results!
              return child_indexes.size();
            }

            // We didn't find an ivar matching "name" in our superclass, pop
            // the superclass zero index that we pushed on above.
            child_indexes.pop_back();
          }
        }
      }
    }
    break;

  case clang::Type::ObjCObjectPointer: {
    CompilerType objc_object_clang_type = GetType(
        llvm::cast<clang::ObjCObjectPointerType>(qual_type.getTypePtr())
            ->getPointeeType());
    return objc_object_clang_type.GetIndexOfChildMemberWithName(
        name, omit_empty_base_classes, child_indexes);
  } break;

  case clang::Type::ConstantArray: {
    //                const clang::ConstantArrayType *array =
    //                llvm::cast<clang::ConstantArrayType>(parent_qual_type.getTypePtr());
    //                const uint64_t element_count =
    //                array->getSize().getLimitedValue();
    //
    //                if (idx < element_count)
    //                {
    //                    std::pair<uint64_t, unsigned> field_type_info =
    //                    ast->getTypeInfo(array->getElementType());
    //
    //                    char element_name[32];
    //                    ::snprintf (element_name, sizeof (element_name),
    //                    "%s[%u]", parent_name ? parent_name : "", idx);
    //
    //                    child_name.assign(element_name);
    //                    assert(field_type_info.first % 8 == 0);
    //                    child_byte_size = field_type_info.first / 8;
    //                    child_byte_offset = idx * child_byte_size;
    //                    return array->getElementType().getAsOpaquePtr();
    //                }
  } break;

  //        case clang::Type::MemberPointerType:
  //            {
  //                MemberPointerType *mem_ptr_type =
  //                llvm::cast<MemberPointerType>(qual_type.getTypePtr());
  //                clang::QualType pointee_type =
  //                mem_ptr_type->getPointeeType();
  //
  //                if (TypeSystemClang::IsAggregateType
  //                (pointee_type.getAsOpaquePtr()))
  //                {
  //                    return GetIndexOfChildWithName (ast,
  //                                                    mem_ptr_type->getPointeeType().getAsOpaquePtr(),
  //                                                    name);
  //                }
  //            }
  //            break;
  //
  case clang::Type::LValueReference:
  case clang::Type::RValueReference: {
    const clang::ReferenceType *reference_type =
        llvm::cast<clang::ReferenceType>(qual_type.getTypePtr());
    clang::QualType pointee_type(reference_type->getPointeeType());
    CompilerType pointee_clang_type = GetType(pointee_type);

    if (pointee_clang_type.IsAggregateType()) {
      return pointee_clang_type.GetIndexOfChildMemberWithName(
          name, omit_empty_base_classes, child_indexes);
    }
  } break;

  case clang::Type::Pointer: {
    CompilerType pointee_clang_type(GetPointeeType(type));

    if (pointee_clang_type.IsAggregateType()) {
      return pointee_clang_type.GetIndexOfChildMemberWithName(
          name, omit_empty_base_classes, child_indexes);
    }
  } break;

  default:
    break;
  }
}
return 0;
6855}

6857// Get the index of the child of "clang_type" whose name matches. This function
6858// doesn't descend into the children, but only looks one level deep and name
6859// matches can include base class names.

6861uint32_t
6862TypeSystemClang::GetIndexOfChildWithName(lldb::opaque_compiler_type_t type,
                                       const char *name,
                                       bool omit_empty_base_classes) {
if (type && name && name[0]) {
  clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));

  const clang::Type::TypeClass type_class = qual_type->getTypeClass();

  switch (type_class) {
  case clang::Type::Record:
    if (GetCompleteType(type)) {
      const clang::RecordType *record_type =
          llvm::cast<clang::RecordType>(qual_type.getTypePtr());
      const clang::RecordDecl *record_decl = record_type->getDecl();

      assert(record_decl)((void)0);
      uint32_t child_idx = 0;

      const clang::CXXRecordDecl *cxx_record_decl =
          llvm::dyn_cast<clang::CXXRecordDecl>(record_decl);

      if (cxx_record_decl) {
        clang::CXXRecordDecl::base_class_const_iterator base_class,
            base_class_end;
        for (base_class = cxx_record_decl->bases_begin(),
            base_class_end = cxx_record_decl->bases_end();
             base_class != base_class_end; ++base_class) {
          // Skip empty base classes
          clang::CXXRecordDecl *base_class_decl =
              llvm::cast<clang::CXXRecordDecl>(
                  base_class->getType()
                      ->getAs<clang::RecordType>()
                      ->getDecl());
          if (omit_empty_base_classes &&
              !TypeSystemClang::RecordHasFields(base_class_decl))
            continue;

          CompilerType base_class_clang_type = GetType(base_class->getType());
          std::string base_class_type_name(
              base_class_clang_type.GetTypeName().AsCString(""));
          if (base_class_type_name == name)
            return child_idx;
          ++child_idx;
        }
      }

      // Try and find a field that matches NAME
      clang::RecordDecl::field_iterator field, field_end;
      llvm::StringRef name_sref(name);
      for (field = record_decl->field_begin(),
          field_end = record_decl->field_end();
           field != field_end; ++field, ++child_idx) {
        if (field->getName().equals(name_sref))
          return child_idx;
      }
    }
    break;

  case clang::Type::ObjCObject:
  case clang::Type::ObjCInterface:
    if (GetCompleteType(type)) {
      llvm::StringRef name_sref(name);
      const clang::ObjCObjectType *objc_class_type =
          llvm::dyn_cast<clang::ObjCObjectType>(qual_type.getTypePtr());
      assert(objc_class_type)((void)0);
      if (objc_class_type) {
        uint32_t child_idx = 0;
        clang::ObjCInterfaceDecl *class_interface_decl =
            objc_class_type->getInterface();

        if (class_interface_decl) {
          clang::ObjCInterfaceDecl::ivar_iterator ivar_pos,
              ivar_end = class_interface_decl->ivar_end();
          clang::ObjCInterfaceDecl *superclass_interface_decl =
              class_interface_decl->getSuperClass();

          for (ivar_pos = class_interface_decl->ivar_begin();
               ivar_pos != ivar_end; ++ivar_pos, ++child_idx) {
            const clang::ObjCIvarDecl *ivar_decl = *ivar_pos;

            if (ivar_decl->getName().equals(name_sref)) {
              if ((!omit_empty_base_classes && superclass_interface_decl) ||
                  (omit_empty_base_classes &&
                   ObjCDeclHasIVars(superclass_interface_decl, true)))
                ++child_idx;

              return child_idx;
            }
          }

          if (superclass_interface_decl) {
            if (superclass_interface_decl->getName().equals(name_sref))
              return 0;
          }
        }
      }
    }
    break;

  case clang::Type::ObjCObjectPointer: {
    CompilerType pointee_clang_type = GetType(
        llvm::cast<clang::ObjCObjectPointerType>(qual_type.getTypePtr())
            ->getPointeeType());
    return pointee_clang_type.GetIndexOfChildWithName(
        name, omit_empty_base_classes);
  } break;

  case clang::Type::ConstantArray: {
    //                const clang::ConstantArrayType *array =
    //                llvm::cast<clang::ConstantArrayType>(parent_qual_type.getTypePtr());
    //                const uint64_t element_count =
    //                array->getSize().getLimitedValue();
    //
    //                if (idx < element_count)
    //                {
    //                    std::pair<uint64_t, unsigned> field_type_info =
    //                    ast->getTypeInfo(array->getElementType());
    //
    //                    char element_name[32];
    //                    ::snprintf (element_name, sizeof (element_name),
    //                    "%s[%u]", parent_name ? parent_name : "", idx);
    //
    //                    child_name.assign(element_name);
    //                    assert(field_type_info.first % 8 == 0);
    //                    child_byte_size = field_type_info.first / 8;
    //                    child_byte_offset = idx * child_byte_size;
    //                    return array->getElementType().getAsOpaquePtr();
    //                }
  } break;

  //        case clang::Type::MemberPointerType:
  //            {
  //                MemberPointerType *mem_ptr_type =
  //                llvm::cast<MemberPointerType>(qual_type.getTypePtr());
  //                clang::QualType pointee_type =
  //                mem_ptr_type->getPointeeType();
  //
  //                if (TypeSystemClang::IsAggregateType
  //                (pointee_type.getAsOpaquePtr()))
  //                {
  //                    return GetIndexOfChildWithName (ast,
  //                                                    mem_ptr_type->getPointeeType().getAsOpaquePtr(),
  //                                                    name);
  //                }
  //            }
  //            break;
  //
  case clang::Type::LValueReference:
  case clang::Type::RValueReference: {
    const clang::ReferenceType *reference_type =
        llvm::cast<clang::ReferenceType>(qual_type.getTypePtr());
    CompilerType pointee_type = GetType(reference_type->getPointeeType());

    if (pointee_type.IsAggregateType()) {
      return pointee_type.GetIndexOfChildWithName(name,
                                                  omit_empty_base_classes);
    }
  } break;

  case clang::Type::Pointer: {
    const clang::PointerType *pointer_type =
        llvm::cast<clang::PointerType>(qual_type.getTypePtr());
    CompilerType pointee_type = GetType(pointer_type->getPointeeType());

    if (pointee_type.IsAggregateType()) {
      return pointee_type.GetIndexOfChildWithName(name,
                                                  omit_empty_base_classes);
    } else {
      //                    if (parent_name)
      //                    {
      //                        child_name.assign(1, '*');
      //                        child_name += parent_name;
      //                    }
      //
      //                    // We have a pointer to an simple type
      //                    if (idx == 0)
      //                    {
      //                        std::pair<uint64_t, unsigned> clang_type_info
      //                        = ast->getTypeInfo(pointee_type);
      //                        assert(clang_type_info.first % 8 == 0);
      //                        child_byte_size = clang_type_info.first / 8;
      //                        child_byte_offset = 0;
      //                        return pointee_type.getAsOpaquePtr();
      //                    }
    }
  } break;

  default:
    break;
  }
}
return UINT32_MAX0xffffffffU;
7054}

7056size_t
7057TypeSystemClang::GetNumTemplateArguments(lldb::opaque_compiler_type_t type) {
if (!type)
  return 0;

clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Record:
  if (GetCompleteType(type)) {
    const clang::CXXRecordDecl *cxx_record_decl =
        qual_type->getAsCXXRecordDecl();
    if (cxx_record_decl) {
      const clang::ClassTemplateSpecializationDecl *template_decl =
          llvm::dyn_cast<clang::ClassTemplateSpecializationDecl>(
              cxx_record_decl);
      if (template_decl)
        return template_decl->getTemplateArgs().size();
    }
  }
  break;

default:
  break;
}

return 0;
7083}

7085const clang::ClassTemplateSpecializationDecl *
7086TypeSystemClang::GetAsTemplateSpecialization(
  lldb::opaque_compiler_type_t type) {
if (!type)
  return nullptr;

clang::QualType qual_type(RemoveWrappingTypes(GetCanonicalQualType(type)));
const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Record: {
  if (! GetCompleteType(type))
    return nullptr;
  const clang::CXXRecordDecl *cxx_record_decl =
      qual_type->getAsCXXRecordDecl();
  if (!cxx_record_decl)
    return nullptr;
  return llvm::dyn_cast<clang::ClassTemplateSpecializationDecl>(
      cxx_record_decl);
}

default:
  return nullptr;
}
7108}

7110lldb::TemplateArgumentKind
7111TypeSystemClang::GetTemplateArgumentKind(lldb::opaque_compiler_type_t type,
                                       size_t arg_idx) {
const clang::ClassTemplateSpecializationDecl *template_decl =
    GetAsTemplateSpecialization(type);
if (! template_decl || arg_idx >= template_decl->getTemplateArgs().size())
  return eTemplateArgumentKindNull;

switch (template_decl->getTemplateArgs()[arg_idx].getKind()) {
case clang::TemplateArgument::Null:
  return eTemplateArgumentKindNull;

case clang::TemplateArgument::NullPtr:
  return eTemplateArgumentKindNullPtr;

case clang::TemplateArgument::Type:
  return eTemplateArgumentKindType;

case clang::TemplateArgument::Declaration:
  return eTemplateArgumentKindDeclaration;

case clang::TemplateArgument::Integral:
  return eTemplateArgumentKindIntegral;

case clang::TemplateArgument::Template:
  return eTemplateArgumentKindTemplate;

case clang::TemplateArgument::TemplateExpansion:
  return eTemplateArgumentKindTemplateExpansion;

case clang::TemplateArgument::Expression:
  return eTemplateArgumentKindExpression;

case clang::TemplateArgument::Pack:
  return eTemplateArgumentKindPack;
}
llvm_unreachable("Unhandled clang::TemplateArgument::ArgKind")__builtin_unreachable();
7147}

7149CompilerType
7150TypeSystemClang::GetTypeTemplateArgument(lldb::opaque_compiler_type_t type,
                                       size_t idx) {
const clang::ClassTemplateSpecializationDecl *template_decl =
    GetAsTemplateSpecialization(type);
if (!template_decl || idx >= template_decl->getTemplateArgs().size())
  return CompilerType();

const clang::TemplateArgument &template_arg =
    template_decl->getTemplateArgs()[idx];
if (template_arg.getKind() != clang::TemplateArgument::Type)
  return CompilerType();

return GetType(template_arg.getAsType());
7163}

7165Optional<CompilerType::IntegralTemplateArgument>
7166TypeSystemClang::GetIntegralTemplateArgument(lldb::opaque_compiler_type_t type,
                                           size_t idx) {
const clang::ClassTemplateSpecializationDecl *template_decl =
    GetAsTemplateSpecialization(type);
if (! template_decl || idx >= template_decl->getTemplateArgs().size())
  return llvm::None;

const clang::TemplateArgument &template_arg =
    template_decl->getTemplateArgs()[idx];
if (template_arg.getKind() != clang::TemplateArgument::Integral)
  return llvm::None;

return {
    {template_arg.getAsIntegral(), GetType(template_arg.getIntegralType())}};
7180}

7182CompilerType TypeSystemClang::GetTypeForFormatters(void *type) {
if (type)
  return ClangUtil::RemoveFastQualifiers(CompilerType(this, type));
return CompilerType();
7186}

7188clang::EnumDecl *TypeSystemClang::GetAsEnumDecl(const CompilerType &type) {
const clang::EnumType *enutype =
    llvm::dyn_cast<clang::EnumType>(ClangUtil::GetCanonicalQualType(type));
if (enutype)
  return enutype->getDecl();
return nullptr;
7194}

7196clang::RecordDecl *TypeSystemClang::GetAsRecordDecl(const CompilerType &type) {
const clang::RecordType *record_type =
    llvm::dyn_cast<clang::RecordType>(ClangUtil::GetCanonicalQualType(type));
if (record_type)
  return record_type->getDecl();
return nullptr;
7202}

7204clang::TagDecl *TypeSystemClang::GetAsTagDecl(const CompilerType &type) {
return ClangUtil::GetAsTagDecl(type);
7206}

7208clang::TypedefNameDecl *
7209TypeSystemClang::GetAsTypedefDecl(const CompilerType &type) {
const clang::TypedefType *typedef_type =
    llvm::dyn_cast<clang::TypedefType>(ClangUtil::GetQualType(type));
if (typedef_type)
  return typedef_type->getDecl();
return nullptr;
7215}

7217clang::CXXRecordDecl *
7218TypeSystemClang::GetAsCXXRecordDecl(lldb::opaque_compiler_type_t type) {
return GetCanonicalQualType(type)->getAsCXXRecordDecl();
7220}

7222clang::ObjCInterfaceDecl *
7223TypeSystemClang::GetAsObjCInterfaceDecl(const CompilerType &type) {
const clang::ObjCObjectType *objc_class_type =
    llvm::dyn_cast<clang::ObjCObjectType>(
        ClangUtil::GetCanonicalQualType(type));
if (objc_class_type)
  return objc_class_type->getInterface();
return nullptr;
7230}

7232clang::FieldDecl *TypeSystemClang::AddFieldToRecordType(
  const CompilerType &type, llvm::StringRef name,
  const CompilerType &field_clang_type, AccessType access,
  uint32_t bitfield_bit_size) {
if (!type.IsValid() || !field_clang_type.IsValid())
  return nullptr;
TypeSystemClang *ast =
    llvm::dyn_cast_or_null<TypeSystemClang>(type.GetTypeSystem());
if (!ast)
  return nullptr;
clang::ASTContext &clang_ast = ast->getASTContext();
clang::IdentifierInfo *ident = nullptr;
if (!name.empty())
  ident = &clang_ast.Idents.get(name);

clang::FieldDecl *field = nullptr;

clang::Expr *bit_width = nullptr;
if (bitfield_bit_size != 0) {
  llvm::APInt bitfield_bit_size_apint(clang_ast.getTypeSize(clang_ast.IntTy),
                                      bitfield_bit_size);
  bit_width = new (clang_ast)
      clang::IntegerLiteral(clang_ast, bitfield_bit_size_apint,
                            clang_ast.IntTy, clang::SourceLocation());
}

clang::RecordDecl *record_decl = ast->GetAsRecordDecl(type);
if (record_decl) {
  field = clang::FieldDecl::CreateDeserialized(clang_ast, 0);
  field->setDeclContext(record_decl);
  field->setDeclName(ident);
  field->setType(ClangUtil::GetQualType(field_clang_type));
  if (bit_width)
    field->setBitWidth(bit_width);
  SetMemberOwningModule(field, record_decl);

  if (name.empty()) {
    // Determine whether this field corresponds to an anonymous struct or
    // union.
    if (const clang::TagType *TagT =
            field->getType()->getAs<clang::TagType>()) {
      if (clang::RecordDecl *Rec =
              llvm::dyn_cast<clang::RecordDecl>(TagT->getDecl()))
        if (!Rec->getDeclName()) {
          Rec->setAnonymousStructOrUnion(true);
          field->setImplicit();
        }
    }
  }

  if (field) {
    field->setAccess(
        TypeSystemClang::ConvertAccessTypeToAccessSpecifier(access));

    record_decl->addDecl(field);

    VerifyDecl(field);
  }
} else {
  clang::ObjCInterfaceDecl *class_interface_decl =
      ast->GetAsObjCInterfaceDecl(type);

  if (class_interface_decl) {
    const bool is_synthesized = false;

    field_clang_type.GetCompleteType();

    auto *ivar = clang::ObjCIvarDecl::CreateDeserialized(clang_ast, 0);
    ivar->setDeclContext(class_interface_decl);
    ivar->setDeclName(ident);
    ivar->setType(ClangUtil::GetQualType(field_clang_type));
    ivar->setAccessControl(ConvertAccessTypeToObjCIvarAccessControl(access));
    if (bit_width)
      ivar->setBitWidth(bit_width);
    ivar->setSynthesize(is_synthesized);
    field = ivar;
    SetMemberOwningModule(field, class_interface_decl);

    if (field) {
      class_interface_decl->addDecl(field);

      VerifyDecl(field);
    }
  }
}
return field;
7318}

7320void TypeSystemClang::BuildIndirectFields(const CompilerType &type) {
if (!type)
  return;

TypeSystemClang *ast = llvm::dyn_cast<TypeSystemClang>(type.GetTypeSystem());
if (!ast)
  return;

clang::RecordDecl *record_decl = ast->GetAsRecordDecl(type);

if (!record_decl)
  return;

typedef llvm::SmallVector<clang::IndirectFieldDecl *, 1> IndirectFieldVector;

IndirectFieldVector indirect_fields;
clang::RecordDecl::field_iterator field_pos;
clang::RecordDecl::field_iterator field_end_pos = record_decl->field_end();
clang::RecordDecl::field_iterator last_field_pos = field_end_pos;
for (field_pos = record_decl->field_begin(); field_pos != field_end_pos;
     last_field_pos = field_pos++) {
  if (field_pos->isAnonymousStructOrUnion()) {
    clang::QualType field_qual_type = field_pos->getType();

    const clang::RecordType *field_record_type =
        field_qual_type->getAs<clang::RecordType>();

    if (!field_record_type)
      continue;

    clang::RecordDecl *field_record_decl = field_record_type->getDecl();

    if (!field_record_decl)
      continue;

    for (clang::RecordDecl::decl_iterator
             di = field_record_decl->decls_begin(),
             de = field_record_decl->decls_end();
         di != de; ++di) {
      if (clang::FieldDecl *nested_field_decl =
              llvm::dyn_cast<clang::FieldDecl>(*di)) {
        clang::NamedDecl **chain =
            new (ast->getASTContext()) clang::NamedDecl *[2];
        chain[0] = *field_pos;
        chain[1] = nested_field_decl;
        clang::IndirectFieldDecl *indirect_field =
            clang::IndirectFieldDecl::Create(
                ast->getASTContext(), record_decl, clang::SourceLocation(),
                nested_field_decl->getIdentifier(),
                nested_field_decl->getType(), {chain, 2});
        SetMemberOwningModule(indirect_field, record_decl);

        indirect_field->setImplicit();

        indirect_field->setAccess(TypeSystemClang::UnifyAccessSpecifiers(
            field_pos->getAccess(), nested_field_decl->getAccess()));

        indirect_fields.push_back(indirect_field);
      } else if (clang::IndirectFieldDecl *nested_indirect_field_decl =
                     llvm::dyn_cast<clang::IndirectFieldDecl>(*di)) {
        size_t nested_chain_size =
            nested_indirect_field_decl->getChainingSize();
        clang::NamedDecl **chain = new (ast->getASTContext())
            clang::NamedDecl *[nested_chain_size + 1];
        chain[0] = *field_pos;

        int chain_index = 1;
        for (clang::IndirectFieldDecl::chain_iterator
                 nci = nested_indirect_field_decl->chain_begin(),
                 nce = nested_indirect_field_decl->chain_end();
             nci < nce; ++nci) {
          chain[chain_index] = *nci;
          chain_index++;
        }

        clang::IndirectFieldDecl *indirect_field =
            clang::IndirectFieldDecl::Create(
                ast->getASTContext(), record_decl, clang::SourceLocation(),
                nested_indirect_field_decl->getIdentifier(),
                nested_indirect_field_decl->getType(),
                {chain, nested_chain_size + 1});
        SetMemberOwningModule(indirect_field, record_decl);

        indirect_field->setImplicit();

        indirect_field->setAccess(TypeSystemClang::UnifyAccessSpecifiers(
            field_pos->getAccess(), nested_indirect_field_decl->getAccess()));

        indirect_fields.push_back(indirect_field);
      }
    }
  }
}

// Check the last field to see if it has an incomplete array type as its last
// member and if it does, the tell the record decl about it
if (last_field_pos != field_end_pos) {
  if (last_field_pos->getType()->isIncompleteArrayType())
    record_decl->hasFlexibleArrayMember();
}

for (IndirectFieldVector::iterator ifi = indirect_fields.begin(),
                                   ife = indirect_fields.end();
     ifi < ife; ++ifi) {
  record_decl->addDecl(*ifi);
}
7426}

7428void TypeSystemClang::SetIsPacked(const CompilerType &type) {
if (type) {
  TypeSystemClang *ast =
      llvm::dyn_cast<TypeSystemClang>(type.GetTypeSystem());
  if (ast) {
    clang::RecordDecl *record_decl = GetAsRecordDecl(type);

    if (!record_decl)
      return;

    record_decl->addAttr(
        clang::PackedAttr::CreateImplicit(ast->getASTContext()));
  }
}
7442}

7444clang::VarDecl *TypeSystemClang::AddVariableToRecordType(
  const CompilerType &type, llvm::StringRef name,
  const CompilerType &var_type, AccessType access) {
if (!type.IsValid() || !var_type.IsValid())
  return nullptr;

TypeSystemClang *ast = llvm::dyn_cast<TypeSystemClang>(type.GetTypeSystem());
if (!ast)
  return nullptr;

clang::RecordDecl *record_decl = ast->GetAsRecordDecl(type);
if (!record_decl)
  return nullptr;

clang::VarDecl *var_decl = nullptr;
clang::IdentifierInfo *ident = nullptr;
if (!name.empty())
  ident = &ast->getASTContext().Idents.get(name);

var_decl = clang::VarDecl::CreateDeserialized(ast->getASTContext(), 0);
var_decl->setDeclContext(record_decl);
var_decl->setDeclName(ident);
var_decl->setType(ClangUtil::GetQualType(var_type));
var_decl->setStorageClass(clang::SC_Static);
SetMemberOwningModule(var_decl, record_decl);
if (!var_decl)
  return nullptr;

var_decl->setAccess(
    TypeSystemClang::ConvertAccessTypeToAccessSpecifier(access));
record_decl->addDecl(var_decl);

VerifyDecl(var_decl);

return var_decl;
7479}

7481void TypeSystemClang::SetIntegerInitializerForVariable(
  VarDecl *var, const llvm::APInt &init_value) {
assert(!var->hasInit() && "variable already initialized")((void)0);

clang::ASTContext &ast = var->getASTContext();
QualType qt = var->getType();
assert(qt->isIntegralOrEnumerationType() &&((void)0)
       "only integer or enum types supported")((void)0);
// If the variable is an enum type, take the underlying integer type as
// the type of the integer literal.
if (const EnumType *enum_type = llvm::dyn_cast<EnumType>(qt.getTypePtr())) {
  const EnumDecl *enum_decl = enum_type->getDecl();
  qt = enum_decl->getIntegerType();
}
var->setInit(IntegerLiteral::Create(ast, init_value, qt.getUnqualifiedType(),
                                    SourceLocation()));
7497}

7499void TypeSystemClang::SetFloatingInitializerForVariable(
  clang::VarDecl *var, const llvm::APFloat &init_value) {
assert(!var->hasInit() && "variable already initialized")((void)0);

clang::ASTContext &ast = var->getASTContext();
QualType qt = var->getType();
assert(qt->isFloatingType() && "only floating point types supported")((void)0);
var->setInit(FloatingLiteral::Create(
    ast, init_value, true, qt.getUnqualifiedType(), SourceLocation()));
7508}

7510clang::CXXMethodDecl *TypeSystemClang::AddMethodToCXXRecordType(
  lldb::opaque_compiler_type_t type, llvm::StringRef name,
  const char *mangled_name, const CompilerType &method_clang_type,
  lldb::AccessType access, bool is_virtual, bool is_static, bool is_inline,
  bool is_explicit, bool is_attr_used, bool is_artificial) {
if (!type || !method_clang_type.IsValid() || name.empty())
  return nullptr;

clang::QualType record_qual_type(GetCanonicalQualType(type));

clang::CXXRecordDecl *cxx_record_decl =
    record_qual_type->getAsCXXRecordDecl();

if (cxx_record_decl == nullptr)
  return nullptr;

clang::QualType method_qual_type(ClangUtil::GetQualType(method_clang_type));

clang::CXXMethodDecl *cxx_method_decl = nullptr;

clang::DeclarationName decl_name(&getASTContext().Idents.get(name));

const clang::FunctionType *function_type =
    llvm::dyn_cast<clang::FunctionType>(method_qual_type.getTypePtr());

if (function_type == nullptr)
  return nullptr;

const clang::FunctionProtoType *method_function_prototype(
    llvm::dyn_cast<clang::FunctionProtoType>(function_type));

if (!method_function_prototype)
  return nullptr;

unsigned int num_params = method_function_prototype->getNumParams();

clang::CXXDestructorDecl *cxx_dtor_decl(nullptr);
clang::CXXConstructorDecl *cxx_ctor_decl(nullptr);

if (is_artificial)
  return nullptr; // skip everything artificial

const clang::ExplicitSpecifier explicit_spec(
    nullptr /*expr*/, is_explicit ? clang::ExplicitSpecKind::ResolvedTrue
                                  : clang::ExplicitSpecKind::ResolvedFalse);

if (name.startswith("~")) {
  cxx_dtor_decl =
      clang::CXXDestructorDecl::CreateDeserialized(getASTContext(), 0);
  cxx_dtor_decl->setDeclContext(cxx_record_decl);
  cxx_dtor_decl->setDeclName(
      getASTContext().DeclarationNames.getCXXDestructorName(
          getASTContext().getCanonicalType(record_qual_type)));
  cxx_dtor_decl->setType(method_qual_type);
  cxx_dtor_decl->setImplicit(is_artificial);
  cxx_dtor_decl->setInlineSpecified(is_inline);
  cxx_dtor_decl->setConstexprKind(ConstexprSpecKind::Unspecified);
  cxx_method_decl = cxx_dtor_decl;
} else if (decl_name == cxx_record_decl->getDeclName()) {
  cxx_ctor_decl = clang::CXXConstructorDecl::CreateDeserialized(
      getASTContext(), 0, 0);
  cxx_ctor_decl->setDeclContext(cxx_record_decl);
  cxx_ctor_decl->setDeclName(
      getASTContext().DeclarationNames.getCXXConstructorName(
          getASTContext().getCanonicalType(record_qual_type)));
  cxx_ctor_decl->setType(method_qual_type);
  cxx_ctor_decl->setImplicit(is_artificial);
  cxx_ctor_decl->setInlineSpecified(is_inline);
  cxx_ctor_decl->setConstexprKind(ConstexprSpecKind::Unspecified);
  cxx_ctor_decl->setNumCtorInitializers(0);
  cxx_ctor_decl->setExplicitSpecifier(explicit_spec);
  cxx_method_decl = cxx_ctor_decl;
} else {
  clang::StorageClass SC = is_static ? clang::SC_Static : clang::SC_None;
  clang::OverloadedOperatorKind op_kind = clang::NUM_OVERLOADED_OPERATORS;

  if (IsOperator(name, op_kind)) {
    if (op_kind != clang::NUM_OVERLOADED_OPERATORS) {
      // Check the number of operator parameters. Sometimes we have seen bad
      // DWARF that doesn't correctly describe operators and if we try to
      // create a method and add it to the class, clang will assert and
      // crash, so we need to make sure things are acceptable.
      const bool is_method = true;
      if (!TypeSystemClang::CheckOverloadedOperatorKindParameterCount(
              is_method, op_kind, num_params))
        return nullptr;
      cxx_method_decl =
          clang::CXXMethodDecl::CreateDeserialized(getASTContext(), 0);
      cxx_method_decl->setDeclContext(cxx_record_decl);
      cxx_method_decl->setDeclName(
          getASTContext().DeclarationNames.getCXXOperatorName(op_kind));
      cxx_method_decl->setType(method_qual_type);
      cxx_method_decl->setStorageClass(SC);
      cxx_method_decl->setInlineSpecified(is_inline);
      cxx_method_decl->setConstexprKind(ConstexprSpecKind::Unspecified);
    } else if (num_params == 0) {
      // Conversion operators don't take params...
      auto *cxx_conversion_decl =
          clang::CXXConversionDecl::CreateDeserialized(getASTContext(), 0);
      cxx_conversion_decl->setDeclContext(cxx_record_decl);
      cxx_conversion_decl->setDeclName(
          getASTContext().DeclarationNames.getCXXConversionFunctionName(
              getASTContext().getCanonicalType(
                  function_type->getReturnType())));
      cxx_conversion_decl->setType(method_qual_type);
      cxx_conversion_decl->setInlineSpecified(is_inline);
      cxx_conversion_decl->setExplicitSpecifier(explicit_spec);
      cxx_conversion_decl->setConstexprKind(ConstexprSpecKind::Unspecified);
      cxx_method_decl = cxx_conversion_decl;
    }
  }

  if (cxx_method_decl == nullptr) {
    cxx_method_decl =
        clang::CXXMethodDecl::CreateDeserialized(getASTContext(), 0);
    cxx_method_decl->setDeclContext(cxx_record_decl);
    cxx_method_decl->setDeclName(decl_name);
    cxx_method_decl->setType(method_qual_type);
    cxx_method_decl->setInlineSpecified(is_inline);
    cxx_method_decl->setStorageClass(SC);
    cxx_method_decl->setConstexprKind(ConstexprSpecKind::Unspecified);
  }
}
SetMemberOwningModule(cxx_method_decl, cxx_record_decl);

clang::AccessSpecifier access_specifier =
    TypeSystemClang::ConvertAccessTypeToAccessSpecifier(access);

cxx_method_decl->setAccess(access_specifier);
cxx_method_decl->setVirtualAsWritten(is_virtual);

if (is_attr_used)
  cxx_method_decl->addAttr(clang::UsedAttr::CreateImplicit(getASTContext()));

if (mangled_name != nullptr) {
  cxx_method_decl->addAttr(clang::AsmLabelAttr::CreateImplicit(
      getASTContext(), mangled_name, /*literal=*/false));
}

// Populate the method decl with parameter decls

llvm::SmallVector<clang::ParmVarDecl *, 12> params;

for (unsigned param_index = 0; param_index < num_params; ++param_index) {
  params.push_back(clang::ParmVarDecl::Create(
      getASTContext(), cxx_method_decl, clang::SourceLocation(),
      clang::SourceLocation(),
      nullptr, // anonymous
      method_function_prototype->getParamType(param_index), nullptr,
      clang::SC_None, nullptr));
}

cxx_method_decl->setParams(llvm::ArrayRef<clang::ParmVarDecl *>(params));

cxx_record_decl->addDecl(cxx_method_decl);

// Sometimes the debug info will mention a constructor (default/copy/move),
// destructor, or assignment operator (copy/move) but there won't be any
// version of this in the code. So we check if the function was artificially
// generated and if it is trivial and this lets the compiler/backend know
// that it can inline the IR for these when it needs to and we can avoid a
// "missing function" error when running expressions.

if (is_artificial) {
  if (cxx_ctor_decl && ((cxx_ctor_decl->isDefaultConstructor() &&
                         cxx_record_decl->hasTrivialDefaultConstructor()) ||
                        (cxx_ctor_decl->isCopyConstructor() &&
                         cxx_record_decl->hasTrivialCopyConstructor()) ||
                        (cxx_ctor_decl->isMoveConstructor() &&
                         cxx_record_decl->hasTrivialMoveConstructor()))) {
    cxx_ctor_decl->setDefaulted();
    cxx_ctor_decl->setTrivial(true);
  } else if (cxx_dtor_decl) {
    if (cxx_record_decl->hasTrivialDestructor()) {
      cxx_dtor_decl->setDefaulted();
      cxx_dtor_decl->setTrivial(true);
    }
  } else if ((cxx_method_decl->isCopyAssignmentOperator() &&
              cxx_record_decl->hasTrivialCopyAssignment()) ||
             (cxx_method_decl->isMoveAssignmentOperator() &&
              cxx_record_decl->hasTrivialMoveAssignment())) {
    cxx_method_decl->setDefaulted();
    cxx_method_decl->setTrivial(true);
  }
}

VerifyDecl(cxx_method_decl);

return cxx_method_decl;
7699}

7701void TypeSystemClang::AddMethodOverridesForCXXRecordType(
  lldb::opaque_compiler_type_t type) {
if (auto *record = GetAsCXXRecordDecl(type))
  for (auto *method : record->methods())
    addOverridesForMethod(method);
7706}

7708#pragma mark C++ Base Classes

7710std::unique_ptr<clang::CXXBaseSpecifier>
7711TypeSystemClang::CreateBaseClassSpecifier(lldb::opaque_compiler_type_t type,
                                        AccessType access, bool is_virtual,
                                        bool base_of_class) {
if (!type)
  return nullptr;

return std::make_unique<clang::CXXBaseSpecifier>(
    clang::SourceRange(), is_virtual, base_of_class,
    TypeSystemClang::ConvertAccessTypeToAccessSpecifier(access),
    getASTContext().getTrivialTypeSourceInfo(GetQualType(type)),
    clang::SourceLocation());
7722}

7724bool TypeSystemClang::TransferBaseClasses(
  lldb::opaque_compiler_type_t type,
  std::vector<std::unique_ptr<clang::CXXBaseSpecifier>> bases) {
if (!type)
  return false;
clang::CXXRecordDecl *cxx_record_decl = GetAsCXXRecordDecl(type);
if (!cxx_record_decl)
  return false;
std::vector<clang::CXXBaseSpecifier *> raw_bases;
raw_bases.reserve(bases.size());

// Clang will make a copy of them, so it's ok that we pass pointers that we're
// about to destroy.
for (auto &b : bases)
  raw_bases.push_back(b.get());
cxx_record_decl->setBases(raw_bases.data(), raw_bases.size());
return true;
7741}

7743bool TypeSystemClang::SetObjCSuperClass(
  const CompilerType &type, const CompilerType &superclass_clang_type) {
TypeSystemClang *ast =
    llvm::dyn_cast_or_null<TypeSystemClang>(type.GetTypeSystem());
if (!ast)
  return false;
clang::ASTContext &clang_ast = ast->getASTContext();

if (type && superclass_clang_type.IsValid() &&
    superclass_clang_type.GetTypeSystem() == type.GetTypeSystem()) {
  clang::ObjCInterfaceDecl *class_interface_decl =
      GetAsObjCInterfaceDecl(type);
  clang::ObjCInterfaceDecl *super_interface_decl =
      GetAsObjCInterfaceDecl(superclass_clang_type);
  if (class_interface_decl && super_interface_decl) {
    class_interface_decl->setSuperClass(clang_ast.getTrivialTypeSourceInfo(
        clang_ast.getObjCInterfaceType(super_interface_decl)));
    return true;
  }
}
return false;
7764}

7766bool TypeSystemClang::AddObjCClassProperty(
  const CompilerType &type, const char *property_name,
  const CompilerType &property_clang_type, clang::ObjCIvarDecl *ivar_decl,
  const char *property_setter_name, const char *property_getter_name,
  uint32_t property_attributes, ClangASTMetadata *metadata) {
if (!type || !property_clang_type.IsValid() || property_name == nullptr ||
    property_name[0] == '\0')
  return false;
TypeSystemClang *ast = llvm::dyn_cast<TypeSystemClang>(type.GetTypeSystem());
if (!ast)
  return false;
clang::ASTContext &clang_ast = ast->getASTContext();

clang::ObjCInterfaceDecl *class_interface_decl = GetAsObjCInterfaceDecl(type);
if (!class_interface_decl)
  return false;

CompilerType property_clang_type_to_access;

if (property_clang_type.IsValid())
  property_clang_type_to_access = property_clang_type;
else if (ivar_decl)
  property_clang_type_to_access = ast->GetType(ivar_decl->getType());

if (!class_interface_decl || !property_clang_type_to_access.IsValid())
  return false;

clang::TypeSourceInfo *prop_type_source;
if (ivar_decl)
  prop_type_source = clang_ast.getTrivialTypeSourceInfo(ivar_decl->getType());
else
  prop_type_source = clang_ast.getTrivialTypeSourceInfo(
      ClangUtil::GetQualType(property_clang_type));

clang::ObjCPropertyDecl *property_decl =
    clang::ObjCPropertyDecl::CreateDeserialized(clang_ast, 0);
property_decl->setDeclContext(class_interface_decl);
property_decl->setDeclName(&clang_ast.Idents.get(property_name));
property_decl->setType(ivar_decl
                           ? ivar_decl->getType()
                           : ClangUtil::GetQualType(property_clang_type),
                       prop_type_source);
SetMemberOwningModule(property_decl, class_interface_decl);

if (!property_decl)
  return false;

if (metadata)
  ast->SetMetadata(property_decl, *metadata);

class_interface_decl->addDecl(property_decl);

clang::Selector setter_sel, getter_sel;

if (property_setter_name) {
  std::string property_setter_no_colon(property_setter_name,
                                       strlen(property_setter_name) - 1);
  clang::IdentifierInfo *setter_ident =
      &clang_ast.Idents.get(property_setter_no_colon);
  setter_sel = clang_ast.Selectors.getSelector(1, &setter_ident);
} else if (!(property_attributes & DW_APPLE_PROPERTY_readonly)) {
  std::string setter_sel_string("set");
  setter_sel_string.push_back(::toupper(property_name[0]));
  setter_sel_string.append(&property_name[1]);
  clang::IdentifierInfo *setter_ident =
      &clang_ast.Idents.get(setter_sel_string);
  setter_sel = clang_ast.Selectors.getSelector(1, &setter_ident);
}
property_decl->setSetterName(setter_sel);
property_decl->setPropertyAttributes(ObjCPropertyAttribute::kind_setter);

if (property_getter_name != nullptr) {
  clang::IdentifierInfo *getter_ident =
      &clang_ast.Idents.get(property_getter_name);
  getter_sel = clang_ast.Selectors.getSelector(0, &getter_ident);
} else {
  clang::IdentifierInfo *getter_ident = &clang_ast.Idents.get(property_name);
  getter_sel = clang_ast.Selectors.getSelector(0, &getter_ident);
}
property_decl->setGetterName(getter_sel);
property_decl->setPropertyAttributes(ObjCPropertyAttribute::kind_getter);

if (ivar_decl)
  property_decl->setPropertyIvarDecl(ivar_decl);

if (property_attributes & DW_APPLE_PROPERTY_readonly)
  property_decl->setPropertyAttributes(ObjCPropertyAttribute::kind_readonly);
if (property_attributes & DW_APPLE_PROPERTY_readwrite)
  property_decl->setPropertyAttributes(ObjCPropertyAttribute::kind_readwrite);
if (property_attributes & DW_APPLE_PROPERTY_assign)
  property_decl->setPropertyAttributes(ObjCPropertyAttribute::kind_assign);
if (property_attributes & DW_APPLE_PROPERTY_retain)
  property_decl->setPropertyAttributes(ObjCPropertyAttribute::kind_retain);
if (property_attributes & DW_APPLE_PROPERTY_copy)
  property_decl->setPropertyAttributes(ObjCPropertyAttribute::kind_copy);
if (property_attributes & DW_APPLE_PROPERTY_nonatomic)
  property_decl->setPropertyAttributes(ObjCPropertyAttribute::kind_nonatomic);
if (property_attributes & ObjCPropertyAttribute::kind_nullability)
  property_decl->setPropertyAttributes(
      ObjCPropertyAttribute::kind_nullability);
if (property_attributes & ObjCPropertyAttribute::kind_null_resettable)
  property_decl->setPropertyAttributes(
      ObjCPropertyAttribute::kind_null_resettable);
if (property_attributes & ObjCPropertyAttribute::kind_class)
  property_decl->setPropertyAttributes(ObjCPropertyAttribute::kind_class);

const bool isInstance =
    (property_attributes & ObjCPropertyAttribute::kind_class) == 0;

clang::ObjCMethodDecl *getter = nullptr;
if (!getter_sel.isNull())
  getter = isInstance ? class_interface_decl->lookupInstanceMethod(getter_sel)
                      : class_interface_decl->lookupClassMethod(getter_sel);
if (!getter_sel.isNull() && !getter) {
  const bool isVariadic = false;
  const bool isPropertyAccessor = true;
  const bool isSynthesizedAccessorStub = false;
  const bool isImplicitlyDeclared = true;
  const bool isDefined = false;
  const clang::ObjCMethodDecl::ImplementationControl impControl =
      clang::ObjCMethodDecl::None;
  const bool HasRelatedResultType = false;

  getter = clang::ObjCMethodDecl::CreateDeserialized(clang_ast, 0);
  getter->setDeclName(getter_sel);
  getter->setReturnType(ClangUtil::GetQualType(property_clang_type_to_access));
  getter->setDeclContext(class_interface_decl);
  getter->setInstanceMethod(isInstance);
  getter->setVariadic(isVariadic);
  getter->setPropertyAccessor(isPropertyAccessor);
  getter->setSynthesizedAccessorStub(isSynthesizedAccessorStub);
  getter->setImplicit(isImplicitlyDeclared);
  getter->setDefined(isDefined);
  getter->setDeclImplementation(impControl);
  getter->setRelatedResultType(HasRelatedResultType);
  SetMemberOwningModule(getter, class_interface_decl);

  if (getter) {
    if (metadata)
      ast->SetMetadata(getter, *metadata);

    getter->setMethodParams(clang_ast, llvm::ArrayRef<clang::ParmVarDecl *>(),
                            llvm::ArrayRef<clang::SourceLocation>());
    class_interface_decl->addDecl(getter);
  }
}
if (getter) {
  getter->setPropertyAccessor(true);
  property_decl->setGetterMethodDecl(getter);
}

clang::ObjCMethodDecl *setter = nullptr;
  setter = isInstance ? class_interface_decl->lookupInstanceMethod(setter_sel)
                      : class_interface_decl->lookupClassMethod(setter_sel);
if (!setter_sel.isNull() && !setter) {
  clang::QualType result_type = clang_ast.VoidTy;
  const bool isVariadic = false;
  const bool isPropertyAccessor = true;
  const bool isSynthesizedAccessorStub = false;
  const bool isImplicitlyDeclared = true;
  const bool isDefined = false;
  const clang::ObjCMethodDecl::ImplementationControl impControl =
      clang::ObjCMethodDecl::None;
  const bool HasRelatedResultType = false;

  setter = clang::ObjCMethodDecl::CreateDeserialized(clang_ast, 0);
  setter->setDeclName(setter_sel);
  setter->setReturnType(result_type);
  setter->setDeclContext(class_interface_decl);
  setter->setInstanceMethod(isInstance);
  setter->setVariadic(isVariadic);
  setter->setPropertyAccessor(isPropertyAccessor);
  setter->setSynthesizedAccessorStub(isSynthesizedAccessorStub);
  setter->setImplicit(isImplicitlyDeclared);
  setter->setDefined(isDefined);
  setter->setDeclImplementation(impControl);
  setter->setRelatedResultType(HasRelatedResultType);
  SetMemberOwningModule(setter, class_interface_decl);

  if (setter) {
    if (metadata)
      ast->SetMetadata(setter, *metadata);

    llvm::SmallVector<clang::ParmVarDecl *, 1> params;
    params.push_back(clang::ParmVarDecl::Create(
        clang_ast, setter, clang::SourceLocation(), clang::SourceLocation(),
        nullptr, // anonymous
        ClangUtil::GetQualType(property_clang_type_to_access), nullptr,
        clang::SC_Auto, nullptr));

    setter->setMethodParams(clang_ast,
                            llvm::ArrayRef<clang::ParmVarDecl *>(params),
                            llvm::ArrayRef<clang::SourceLocation>());

    class_interface_decl->addDecl(setter);
  }
}
if (setter) {
  setter->setPropertyAccessor(true);
  property_decl->setSetterMethodDecl(setter);
}

return true;
7969}

7971bool TypeSystemClang::IsObjCClassTypeAndHasIVars(const CompilerType &type,
                                               bool check_superclass) {
clang::ObjCInterfaceDecl *class_interface_decl = GetAsObjCInterfaceDecl(type);
if (class_interface_decl)
  return ObjCDeclHasIVars(class_interface_decl, check_superclass);
return false;
7977}

7979clang::ObjCMethodDecl *TypeSystemClang::AddMethodToObjCObjectType(
  const CompilerType &type,
  const char *name, // the full symbol name as seen in the symbol table
                    // (lldb::opaque_compiler_type_t type, "-[NString
                    // stringWithCString:]")
  const CompilerType &method_clang_type, lldb::AccessType access,
  bool is_artificial, bool is_variadic, bool is_objc_direct_call) {
if (!type || !method_clang_type.IsValid())
  return nullptr;

clang::ObjCInterfaceDecl *class_interface_decl = GetAsObjCInterfaceDecl(type);

if (class_interface_decl == nullptr)
  return nullptr;
TypeSystemClang *lldb_ast =
    llvm::dyn_cast<TypeSystemClang>(type.GetTypeSystem());
if (lldb_ast == nullptr)
  return nullptr;
clang::ASTContext &ast = lldb_ast->getASTContext();

const char *selector_start = ::strchr(name, ' ');
if (selector_start == nullptr)
  return nullptr;

selector_start++;
llvm::SmallVector<clang::IdentifierInfo *, 12> selector_idents;

size_t len = 0;
const char *start;

unsigned num_selectors_with_args = 0;
for (start = selector_start; start && *start != '\0' && *start != ']';
     start += len) {
  len = ::strcspn(start, ":]");
  bool has_arg = (start[len] == ':');
  if (has_arg)
    ++num_selectors_with_args;
  selector_idents.push_back(&ast.Idents.get(llvm::StringRef(start, len)));
  if (has_arg)
    len += 1;
}

if (selector_idents.size() == 0)
  return nullptr;

clang::Selector method_selector = ast.Selectors.getSelector(
    num_selectors_with_args ? selector_idents.size() : 0,
    selector_idents.data());

clang::QualType method_qual_type(ClangUtil::GetQualType(method_clang_type));

// Populate the method decl with parameter decls
const clang::Type *method_type(method_qual_type.getTypePtr());

if (method_type == nullptr)
  return nullptr;

const clang::FunctionProtoType *method_function_prototype(
    llvm::dyn_cast<clang::FunctionProtoType>(method_type));

if (!method_function_prototype)
  return nullptr;

const bool isInstance = (name[0] == '-');
const bool isVariadic = is_variadic;
const bool isPropertyAccessor = false;
const bool isSynthesizedAccessorStub = false;
/// Force this to true because we don't have source locations.
const bool isImplicitlyDeclared = true;
const bool isDefined = false;
const clang::ObjCMethodDecl::ImplementationControl impControl =
    clang::ObjCMethodDecl::None;
const bool HasRelatedResultType = false;

const unsigned num_args = method_function_prototype->getNumParams();

if (num_args != num_selectors_with_args)
  return nullptr; // some debug information is corrupt.  We are not going to
                  // deal with it.

auto *objc_method_decl = clang::ObjCMethodDecl::CreateDeserialized(ast, 0);
objc_method_decl->setDeclName(method_selector);
objc_method_decl->setReturnType(method_function_prototype->getReturnType());
objc_method_decl->setDeclContext(
    lldb_ast->GetDeclContextForType(ClangUtil::GetQualType(type)));
objc_method_decl->setInstanceMethod(isInstance);
objc_method_decl->setVariadic(isVariadic);
objc_method_decl->setPropertyAccessor(isPropertyAccessor);
objc_method_decl->setSynthesizedAccessorStub(isSynthesizedAccessorStub);
objc_method_decl->setImplicit(isImplicitlyDeclared);
objc_method_decl->setDefined(isDefined);
objc_method_decl->setDeclImplementation(impControl);
objc_method_decl->setRelatedResultType(HasRelatedResultType);
SetMemberOwningModule(objc_method_decl, class_interface_decl);

if (objc_method_decl == nullptr)
  return nullptr;

if (num_args > 0) {
  llvm::SmallVector<clang::ParmVarDecl *, 12> params;

  for (unsigned param_index = 0; param_index < num_args; ++param_index) {
    params.push_back(clang::ParmVarDecl::Create(
        ast, objc_method_decl, clang::SourceLocation(),
        clang::SourceLocation(),
        nullptr, // anonymous
        method_function_prototype->getParamType(param_index), nullptr,
        clang::SC_Auto, nullptr));
  }

  objc_method_decl->setMethodParams(
      ast, llvm::ArrayRef<clang::ParmVarDecl *>(params),
      llvm::ArrayRef<clang::SourceLocation>());
}

if (is_objc_direct_call) {
  // Add a the objc_direct attribute to the declaration we generate that
  // we generate a direct method call for this ObjCMethodDecl.
  objc_method_decl->addAttr(
      clang::ObjCDirectAttr::CreateImplicit(ast, SourceLocation()));
  // Usually Sema is creating implicit parameters (e.g., self) when it
  // parses the method. We don't have a parsing Sema when we build our own
  // AST here so we manually need to create these implicit parameters to
  // make the direct call code generation happy.
  objc_method_decl->createImplicitParams(ast, class_interface_decl);
}

class_interface_decl->addDecl(objc_method_decl);

VerifyDecl(objc_method_decl);

return objc_method_decl;
8111}

8113bool TypeSystemClang::SetHasExternalStorage(lldb::opaque_compiler_type_t type,
                                          bool has_extern) {
if (!type)
  return false;

clang::QualType qual_type(RemoveWrappingTypes(GetCanonicalQualType(type)));

const clang::Type::TypeClass type_class = qual_type->getTypeClass();
switch (type_class) {
case clang::Type::Record: {
  clang::CXXRecordDecl *cxx_record_decl = qual_type->getAsCXXRecordDecl();
  if (cxx_record_decl) {
    cxx_record_decl->setHasExternalLexicalStorage(has_extern);
    cxx_record_decl->setHasExternalVisibleStorage(has_extern);
    return true;
  }
} break;

case clang::Type::Enum: {
  clang::EnumDecl *enum_decl =
      llvm::cast<clang::EnumType>(qual_type)->getDecl();
  if (enum_decl) {
    enum_decl->setHasExternalLexicalStorage(has_extern);
    enum_decl->setHasExternalVisibleStorage(has_extern);
    return true;
  }
} break;

case clang::Type::ObjCObject:
case clang::Type::ObjCInterface: {
  const clang::ObjCObjectType *objc_class_type =
      llvm::dyn_cast<clang::ObjCObjectType>(qual_type.getTypePtr());
  assert(objc_class_type)((void)0);
  if (objc_class_type) {
    clang::ObjCInterfaceDecl *class_interface_decl =
        objc_class_type->getInterface();

    if (class_interface_decl) {
      class_interface_decl->setHasExternalLexicalStorage(has_extern);
      class_interface_decl->setHasExternalVisibleStorage(has_extern);
      return true;
    }
  }
} break;

default:
  break;
}
return false;
8162}

8164#pragma mark TagDecl

8166bool TypeSystemClang::StartTagDeclarationDefinition(const CompilerType &type) {
clang::QualType qual_type(ClangUtil::GetQualType(type));
if (!qual_type.isNull()) {
  const clang::TagType *tag_type = qual_type->getAs<clang::TagType>();
  if (tag_type) {
    clang::TagDecl *tag_decl = tag_type->getDecl();
    if (tag_decl) {
      tag_decl->startDefinition();
      return true;
    }
  }

  const clang::ObjCObjectType *object_type =
      qual_type->getAs<clang::ObjCObjectType>();
  if (object_type) {
    clang::ObjCInterfaceDecl *interface_decl = object_type->getInterface();
    if (interface_decl) {
      interface_decl->startDefinition();
      return true;
    }
  }
}
return false;
8189}

8191bool TypeSystemClang::CompleteTagDeclarationDefinition(
  const CompilerType &type) {
clang::QualType qual_type(ClangUtil::GetQualType(type));
if (qual_type.isNull())
  return false;

// Make sure we use the same methodology as
// TypeSystemClang::StartTagDeclarationDefinition() as to how we start/end
// the definition.
const clang::TagType *tag_type = qual_type->getAs<clang::TagType>();
if (tag_type) {
  clang::TagDecl *tag_decl = tag_type->getDecl();

  if (auto *cxx_record_decl = llvm::dyn_cast<CXXRecordDecl>(tag_decl)) {
    // If we have a move constructor declared but no copy constructor we
    // need to explicitly mark it as deleted. Usually Sema would do this for
    // us in Sema::DeclareImplicitCopyConstructor but we don't have a Sema
    // when building an AST from debug information.
    // See also:
    // C++11 [class.copy]p7, p18:
    //  If the class definition declares a move constructor or move assignment
    //  operator, an implicitly declared copy constructor or copy assignment
    //  operator is defined as deleted.
    if (cxx_record_decl->hasUserDeclaredMoveConstructor() ||
        cxx_record_decl->hasUserDeclaredMoveAssignment()) {
      if (cxx_record_decl->needsImplicitCopyConstructor())
        cxx_record_decl->setImplicitCopyConstructorIsDeleted();
      if (cxx_record_decl->needsImplicitCopyAssignment())
        cxx_record_decl->setImplicitCopyAssignmentIsDeleted();
    }

    if (!cxx_record_decl->isCompleteDefinition())
      cxx_record_decl->completeDefinition();
    cxx_record_decl->setHasLoadedFieldsFromExternalStorage(true);
    cxx_record_decl->setHasExternalLexicalStorage(false);
    cxx_record_decl->setHasExternalVisibleStorage(false);
    return true;
  }
}

const clang::EnumType *enutype = qual_type->getAs<clang::EnumType>();

if (!enutype)
  return false;
clang::EnumDecl *enum_decl = enutype->getDecl();

if (enum_decl->isCompleteDefinition())
  return true;

TypeSystemClang *lldb_ast =
    llvm::dyn_cast<TypeSystemClang>(type.GetTypeSystem());
if (lldb_ast == nullptr)
  return false;
clang::ASTContext &ast = lldb_ast->getASTContext();

/// TODO This really needs to be fixed.

QualType integer_type(enum_decl->getIntegerType());
if (!integer_type.isNull()) {
  unsigned NumPositiveBits = 1;
  unsigned NumNegativeBits = 0;

  clang::QualType promotion_qual_type;
  // If the enum integer type is less than an integer in bit width,
  // then we must promote it to an integer size.
  if (ast.getTypeSize(enum_decl->getIntegerType()) <
      ast.getTypeSize(ast.IntTy)) {
    if (enum_decl->getIntegerType()->isSignedIntegerType())
      promotion_qual_type = ast.IntTy;
    else
      promotion_qual_type = ast.UnsignedIntTy;
  } else
    promotion_qual_type = enum_decl->getIntegerType();

  enum_decl->completeDefinition(enum_decl->getIntegerType(),
                                promotion_qual_type, NumPositiveBits,
                                NumNegativeBits);
}
return true;
8270}

8272clang::EnumConstantDecl *TypeSystemClang::AddEnumerationValueToEnumerationType(
  const CompilerType &enum_type, const Declaration &decl, const char *name,
  const llvm::APSInt &value) {

if (!enum_type || ConstString(name).IsEmpty())
  return nullptr;

lldbassert(enum_type.GetTypeSystem() == static_cast<TypeSystem *>(this))lldb_private::lldb_assert(static_cast<bool>(enum_type.GetTypeSystem
() == static_cast<TypeSystem *>(this)), "enum_type.GetTypeSystem() == static_cast<TypeSystem *>(this)"
, __FUNCTION__, "/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp"
, 8279);

lldb::opaque_compiler_type_t enum_opaque_compiler_type =
    enum_type.GetOpaqueQualType();

if (!enum_opaque_compiler_type)
  return nullptr;

clang::QualType enum_qual_type(
    GetCanonicalQualType(enum_opaque_compiler_type));

const clang::Type *clang_type = enum_qual_type.getTypePtr();

if (!clang_type)
  return nullptr;

const clang::EnumType *enutype = llvm::dyn_cast<clang::EnumType>(clang_type);

if (!enutype)
  return nullptr;

clang::EnumConstantDecl *enumerator_decl =
    clang::EnumConstantDecl::CreateDeserialized(getASTContext(), 0);
enumerator_decl->setDeclContext(enutype->getDecl());
if (name && name[0])
  enumerator_decl->setDeclName(&getASTContext().Idents.get(name));
enumerator_decl->setType(clang::QualType(enutype, 0));
enumerator_decl->setInitVal(value);
SetMemberOwningModule(enumerator_decl, enutype->getDecl());

if (!enumerator_decl)
  return nullptr;

enutype->getDecl()->addDecl(enumerator_decl);

VerifyDecl(enumerator_decl);
return enumerator_decl;
8316}

8318clang::EnumConstantDecl *TypeSystemClang::AddEnumerationValueToEnumerationType(
  const CompilerType &enum_type, const Declaration &decl, const char *name,
  int64_t enum_value, uint32_t enum_value_bit_size) {
CompilerType underlying_type = GetEnumerationIntegerType(enum_type);
bool is_signed = false;
underlying_type.IsIntegerType(is_signed);

llvm::APSInt value(enum_value_bit_size, is_signed);
value = enum_value;

return AddEnumerationValueToEnumerationType(enum_type, decl, name, value);
8329}

8331CompilerType TypeSystemClang::GetEnumerationIntegerType(CompilerType type) {
clang::QualType qt(ClangUtil::GetQualType(type));
const clang::Type *clang_type = qt.getTypePtrOrNull();
const auto *enum_type = llvm::dyn_cast_or_null<clang::EnumType>(clang_type);
if (!enum_type)
  return CompilerType();

return GetType(enum_type->getDecl()->getIntegerType());
8339}

8341CompilerType
8342TypeSystemClang::CreateMemberPointerType(const CompilerType &type,
                                       const CompilerType &pointee_type) {
if (type && pointee_type.IsValid() &&
    type.GetTypeSystem() == pointee_type.GetTypeSystem()) {
  TypeSystemClang *ast =
      llvm::dyn_cast<TypeSystemClang>(type.GetTypeSystem());
  if (!ast)
    return CompilerType();
  return ast->GetType(ast->getASTContext().getMemberPointerType(
      ClangUtil::GetQualType(pointee_type),
      ClangUtil::GetQualType(type).getTypePtr()));
}
return CompilerType();
8355}

8357// Dumping types
8358#define DEPTH_INCREMENT2 2

8360#ifndef NDEBUG1
8361LLVM_DUMP_METHOD__attribute__((noinline)) void
8362TypeSystemClang::dump(lldb::opaque_compiler_type_t type) const {
if (!type)
  return;
clang::QualType qual_type(GetQualType(type));
qual_type.dump();
8367}
8368#endif

8370void TypeSystemClang::Dump(Stream &s) {
Decl *tu = Decl::castFromDeclContext(GetTranslationUnitDecl());
tu->dump(s.AsRawOstream());
8373}

8375void TypeSystemClang::DumpFromSymbolFile(Stream &s,
                                       llvm::StringRef symbol_name) {
SymbolFile *symfile = GetSymbolFile();

if (!symfile)
  return;

lldb_private::TypeList type_list;
symfile->GetTypes(nullptr, eTypeClassAny, type_list);
size_t ntypes = type_list.GetSize();

for (size_t i = 0; i < ntypes; ++i) {
  TypeSP type = type_list.GetTypeAtIndex(i);

  if (!symbol_name.empty())
    if (symbol_name != type->GetName().GetStringRef())
      continue;

  s << type->GetName().AsCString() << "\n";

  CompilerType full_type = type->GetFullCompilerType();
  if (clang::TagDecl *tag_decl = GetAsTagDecl(full_type)) {
    tag_decl->dump(s.AsRawOstream());
    continue;
  }
  if (clang::TypedefNameDecl *typedef_decl = GetAsTypedefDecl(full_type)) {
    typedef_decl->dump(s.AsRawOstream());
    continue;
  }
  if (auto *objc_obj = llvm::dyn_cast<clang::ObjCObjectType>(
          ClangUtil::GetQualType(full_type).getTypePtr())) {
    if (clang::ObjCInterfaceDecl *interface_decl = objc_obj->getInterface()) {
      interface_decl->dump(s.AsRawOstream());
      continue;
    }
  }
  GetCanonicalQualType(full_type.GetOpaqueQualType())
      .dump(s.AsRawOstream(), getASTContext());
}
8414}

8416void TypeSystemClang::DumpValue(
  lldb::opaque_compiler_type_t type, ExecutionContext *exe_ctx, Stream *s,
  lldb::Format format, const lldb_private::DataExtractor &data,
  lldb::offset_t data_byte_offset, size_t data_byte_size,
  uint32_t bitfield_bit_size, uint32_t bitfield_bit_offset, bool show_types,
  bool show_summary, bool verbose, uint32_t depth) {
if (!type)
  return;

clang::QualType qual_type(GetQualType(type));
switch (qual_type->getTypeClass()) {
case clang::Type::Record:
  if (GetCompleteType(type)) {
    const clang::RecordType *record_type =
        llvm::cast<clang::RecordType>(qual_type.getTypePtr());
    const clang::RecordDecl *record_decl = record_type->getDecl();
    assert(record_decl)((void)0);
    uint32_t field_bit_offset = 0;
    uint32_t field_byte_offset = 0;
    const clang::ASTRecordLayout &record_layout =
        getASTContext().getASTRecordLayout(record_decl);
    uint32_t child_idx = 0;

    const clang::CXXRecordDecl *cxx_record_decl =
        llvm::dyn_cast<clang::CXXRecordDecl>(record_decl);
    if (cxx_record_decl) {
      // We might have base classes to print out first
      clang::CXXRecordDecl::base_class_const_iterator base_class,
          base_class_end;
      for (base_class = cxx_record_decl->bases_begin(),
          base_class_end = cxx_record_decl->bases_end();
           base_class != base_class_end; ++base_class) {
        const clang::CXXRecordDecl *base_class_decl =
            llvm::cast<clang::CXXRecordDecl>(
                base_class->getType()->getAs<clang::RecordType>()->getDecl());

        // Skip empty base classes
        if (!verbose && !TypeSystemClang::RecordHasFields(base_class_decl))
          continue;

        if (base_class->isVirtual())
          field_bit_offset =
              record_layout.getVBaseClassOffset(base_class_decl)
                  .getQuantity() *
              8;
        else
          field_bit_offset = record_layout.getBaseClassOffset(base_class_decl)
                                 .getQuantity() *
                             8;
        field_byte_offset = field_bit_offset / 8;
        assert(field_bit_offset % 8 == 0)((void)0);
        if (child_idx == 0)
          s->PutChar('{');
        else
          s->PutChar(',');

        clang::QualType base_class_qual_type = base_class->getType();
        std::string base_class_type_name(base_class_qual_type.getAsString());

        // Indent and print the base class type name
        s->Format("\n{0}{1}", llvm::fmt_repeat(" ", depth + DEPTH_INCREMENT2),
                  base_class_type_name);

        clang::TypeInfo base_class_type_info =
            getASTContext().getTypeInfo(base_class_qual_type);

        // Dump the value of the member
        CompilerType base_clang_type = GetType(base_class_qual_type);
        base_clang_type.DumpValue(
            exe_ctx,
            s, // Stream to dump to
            base_clang_type
                .GetFormat(), // The format with which to display the member
            data, // Data buffer containing all bytes for this type
            data_byte_offset + field_byte_offset, // Offset into "data" where
                                                  // to grab value from
            base_class_type_info.Width / 8, // Size of this type in bytes
            0,                              // Bitfield bit size
            0,                              // Bitfield bit offset
            show_types,   // Boolean indicating if we should show the variable
                          // types
            show_summary, // Boolean indicating if we should show a summary
                          // for the current type
            verbose,      // Verbose output?
            depth + DEPTH_INCREMENT2); // Scope depth for any types that have
                                      // children

        ++child_idx;
      }
    }
    uint32_t field_idx = 0;
    clang::RecordDecl::field_iterator field, field_end;
    for (field = record_decl->field_begin(),
        field_end = record_decl->field_end();
         field != field_end; ++field, ++field_idx, ++child_idx) {
      // Print the starting squiggly bracket (if this is the first member) or
      // comma (for member 2 and beyond) for the struct/union/class member.
      if (child_idx == 0)
        s->PutChar('{');
      else
        s->PutChar(',');

      // Indent
      s->Printf("\n%*s", depth + DEPTH_INCREMENT2, "");

      clang::QualType field_type = field->getType();
      // Print the member type if requested
      // Figure out the type byte size (field_type_info.first) and alignment
      // (field_type_info.second) from the AST context.
      clang::TypeInfo field_type_info =
          getASTContext().getTypeInfo(field_type);
      assert(field_idx < record_layout.getFieldCount())((void)0);
      // Figure out the field offset within the current struct/union/class
      // type
      field_bit_offset = record_layout.getFieldOffset(field_idx);
      field_byte_offset = field_bit_offset / 8;
      uint32_t field_bitfield_bit_size = 0;
      uint32_t field_bitfield_bit_offset = 0;
      if (FieldIsBitfield(*field, field_bitfield_bit_size))
        field_bitfield_bit_offset = field_bit_offset % 8;

      if (show_types) {
        std::string field_type_name(field_type.getAsString());
        if (field_bitfield_bit_size > 0)
          s->Printf("(%s:%u) ", field_type_name.c_str(),
                    field_bitfield_bit_size);
        else
          s->Printf("(%s) ", field_type_name.c_str());
      }
      // Print the member name and equal sign
      s->Printf("%s = ", field->getNameAsString().c_str());

      // Dump the value of the member
      CompilerType field_clang_type = GetType(field_type);
      field_clang_type.DumpValue(
          exe_ctx,
          s, // Stream to dump to
          field_clang_type
              .GetFormat(), // The format with which to display the member
          data,             // Data buffer containing all bytes for this type
          data_byte_offset + field_byte_offset, // Offset into "data" where to
                                                // grab value from
          field_type_info.Width / 8,            // Size of this type in bytes
          field_bitfield_bit_size,              // Bitfield bit size
          field_bitfield_bit_offset,            // Bitfield bit offset
          show_types,   // Boolean indicating if we should show the variable
                        // types
          show_summary, // Boolean indicating if we should show a summary for
                        // the current type
          verbose,      // Verbose output?
          depth + DEPTH_INCREMENT2); // Scope depth for any types that have
                                    // children
    }

    // Indent the trailing squiggly bracket
    if (child_idx > 0)
      s->Printf("\n%*s}", depth, "");
  }
  return;

case clang::Type::Enum:
  if (GetCompleteType(type)) {
    const clang::EnumType *enutype =
        llvm::cast<clang::EnumType>(qual_type.getTypePtr());
    const clang::EnumDecl *enum_decl = enutype->getDecl();
    assert(enum_decl)((void)0);
    clang::EnumDecl::enumerator_iterator enum_pos, enum_end_pos;
    lldb::offset_t offset = data_byte_offset;
    const int64_t enum_value = data.GetMaxU64Bitfield(
        &offset, data_byte_size, bitfield_bit_size, bitfield_bit_offset);
    for (enum_pos = enum_decl->enumerator_begin(),
        enum_end_pos = enum_decl->enumerator_end();
         enum_pos != enum_end_pos; ++enum_pos) {
      if (enum_pos->getInitVal() == enum_value) {
        s->Printf("%s", enum_pos->getNameAsString().c_str());
        return;
      }
    }
    // If we have gotten here we didn't get find the enumerator in the enum
    // decl, so just print the integer.
    s->Printf("%" PRIi64"lli", enum_value);
  }
  return;

case clang::Type::ConstantArray: {
  const clang::ConstantArrayType *array =
      llvm::cast<clang::ConstantArrayType>(qual_type.getTypePtr());
  bool is_array_of_characters = false;
  clang::QualType element_qual_type = array->getElementType();

  const clang::Type *canonical_type =
      element_qual_type->getCanonicalTypeInternal().getTypePtr();
  if (canonical_type)
    is_array_of_characters = canonical_type->isCharType();

  const uint64_t element_count = array->getSize().getLimitedValue();

  clang::TypeInfo field_type_info =
      getASTContext().getTypeInfo(element_qual_type);

  uint32_t element_idx = 0;
  uint32_t element_offset = 0;
  uint64_t element_byte_size = field_type_info.Width / 8;
  uint32_t element_stride = element_byte_size;

  if (is_array_of_characters) {
    s->PutChar('"');
    DumpDataExtractor(data, s, data_byte_offset, lldb::eFormatChar,
                      element_byte_size, element_count, UINT32_MAX0xffffffffU,
                      LLDB_INVALID_ADDRESS0xffffffffffffffffULL, 0, 0);
    s->PutChar('"');
    return;
  } else {
    CompilerType element_clang_type = GetType(element_qual_type);
    lldb::Format element_format = element_clang_type.GetFormat();

    for (element_idx = 0; element_idx < element_count; ++element_idx) {
      // Print the starting squiggly bracket (if this is the first member) or
      // comman (for member 2 and beyong) for the struct/union/class member.
      if (element_idx == 0)
        s->PutChar('{');
      else
        s->PutChar(',');

      // Indent and print the index
      s->Printf("\n%*s[%u] ", depth + DEPTH_INCREMENT2, "", element_idx);

      // Figure out the field offset within the current struct/union/class
      // type
      element_offset = element_idx * element_stride;

      // Dump the value of the member
      element_clang_type.DumpValue(
          exe_ctx,
          s,              // Stream to dump to
          element_format, // The format with which to display the element
          data,           // Data buffer containing all bytes for this type
          data_byte_offset +
              element_offset, // Offset into "data" where to grab value from
          element_byte_size,  // Size of this type in bytes
          0,                  // Bitfield bit size
          0,                  // Bitfield bit offset
          show_types,   // Boolean indicating if we should show the variable
                        // types
          show_summary, // Boolean indicating if we should show a summary for
                        // the current type
          verbose,      // Verbose output?
          depth + DEPTH_INCREMENT2); // Scope depth for any types that have
                                    // children
    }

    // Indent the trailing squiggly bracket
    if (element_idx > 0)
      s->Printf("\n%*s}", depth, "");
  }
}
  return;

case clang::Type::Typedef: {
  clang::QualType typedef_qual_type =
      llvm::cast<clang::TypedefType>(qual_type)
          ->getDecl()
          ->getUnderlyingType();

  CompilerType typedef_clang_type = GetType(typedef_qual_type);
  lldb::Format typedef_format = typedef_clang_type.GetFormat();
  clang::TypeInfo typedef_type_info =
      getASTContext().getTypeInfo(typedef_qual_type);
  uint64_t typedef_byte_size = typedef_type_info.Width / 8;

  return typedef_clang_type.DumpValue(
      exe_ctx,
      s,                   // Stream to dump to
      typedef_format,      // The format with which to display the element
      data,                // Data buffer containing all bytes for this type
      data_byte_offset,    // Offset into "data" where to grab value from
      typedef_byte_size,   // Size of this type in bytes
      bitfield_bit_size,   // Bitfield bit size
      bitfield_bit_offset, // Bitfield bit offset
      show_types,   // Boolean indicating if we should show the variable types
      show_summary, // Boolean indicating if we should show a summary for the
                    // current type
      verbose,      // Verbose output?
      depth);       // Scope depth for any types that have children
} break;

case clang::Type::Auto: {
  clang::QualType elaborated_qual_type =
      llvm::cast<clang::AutoType>(qual_type)->getDeducedType();
  CompilerType elaborated_clang_type = GetType(elaborated_qual_type);
  lldb::Format elaborated_format = elaborated_clang_type.GetFormat();
  clang::TypeInfo elaborated_type_info =
      getASTContext().getTypeInfo(elaborated_qual_type);
  uint64_t elaborated_byte_size = elaborated_type_info.Width / 8;

  return elaborated_clang_type.DumpValue(
      exe_ctx,
      s,                    // Stream to dump to
      elaborated_format,    // The format with which to display the element
      data,                 // Data buffer containing all bytes for this type
      data_byte_offset,     // Offset into "data" where to grab value from
      elaborated_byte_size, // Size of this type in bytes
      bitfield_bit_size,    // Bitfield bit size
      bitfield_bit_offset,  // Bitfield bit offset
      show_types,   // Boolean indicating if we should show the variable types
      show_summary, // Boolean indicating if we should show a summary for the
                    // current type
      verbose,      // Verbose output?
      depth);       // Scope depth for any types that have children
} break;

case clang::Type::Elaborated: {
  clang::QualType elaborated_qual_type =
      llvm::cast<clang::ElaboratedType>(qual_type)->getNamedType();
  CompilerType elaborated_clang_type = GetType(elaborated_qual_type);
  lldb::Format elaborated_format = elaborated_clang_type.GetFormat();
  clang::TypeInfo elaborated_type_info =
      getASTContext().getTypeInfo(elaborated_qual_type);
  uint64_t elaborated_byte_size = elaborated_type_info.Width / 8;

  return elaborated_clang_type.DumpValue(
      exe_ctx,
      s,                    // Stream to dump to
      elaborated_format,    // The format with which to display the element
      data,                 // Data buffer containing all bytes for this type
      data_byte_offset,     // Offset into "data" where to grab value from
      elaborated_byte_size, // Size of this type in bytes
      bitfield_bit_size,    // Bitfield bit size
      bitfield_bit_offset,  // Bitfield bit offset
      show_types,   // Boolean indicating if we should show the variable types
      show_summary, // Boolean indicating if we should show a summary for the
                    // current type
      verbose,      // Verbose output?
      depth);       // Scope depth for any types that have children
} break;

case clang::Type::Paren: {
  clang::QualType desugar_qual_type =
      llvm::cast<clang::ParenType>(qual_type)->desugar();
  CompilerType desugar_clang_type = GetType(desugar_qual_type);

  lldb::Format desugar_format = desugar_clang_type.GetFormat();
  clang::TypeInfo desugar_type_info =
      getASTContext().getTypeInfo(desugar_qual_type);
  uint64_t desugar_byte_size = desugar_type_info.Width / 8;

  return desugar_clang_type.DumpValue(
      exe_ctx,
      s,                   // Stream to dump to
      desugar_format,      // The format with which to display the element
      data,                // Data buffer containing all bytes for this type
      data_byte_offset,    // Offset into "data" where to grab value from
      desugar_byte_size,   // Size of this type in bytes
      bitfield_bit_size,   // Bitfield bit size
      bitfield_bit_offset, // Bitfield bit offset
      show_types,   // Boolean indicating if we should show the variable types
      show_summary, // Boolean indicating if we should show a summary for the
                    // current type
      verbose,      // Verbose output?
      depth);       // Scope depth for any types that have children
} break;

default:
  // We are down to a scalar type that we just need to display.
  DumpDataExtractor(data, s, data_byte_offset, format, data_byte_size, 1,
                    UINT32_MAX0xffffffffU, LLDB_INVALID_ADDRESS0xffffffffffffffffULL, bitfield_bit_size,
                    bitfield_bit_offset);

  if (show_summary)
    DumpSummary(type, exe_ctx, s, data, data_byte_offset, data_byte_size);
  break;
}
8788}

8790static bool DumpEnumValue(const clang::QualType &qual_type, Stream *s,
                        const DataExtractor &data, lldb::offset_t byte_offset,
                        size_t byte_size, uint32_t bitfield_bit_offset,
                        uint32_t bitfield_bit_size) {
const clang::EnumType *enutype =
    llvm::cast<clang::EnumType>(qual_type.getTypePtr());
const clang::EnumDecl *enum_decl = enutype->getDecl();
assert(enum_decl)((void)0);
lldb::offset_t offset = byte_offset;
const uint64_t enum_svalue = data.GetMaxS64Bitfield(
    &offset, byte_size, bitfield_bit_size, bitfield_bit_offset);
bool can_be_bitfield = true;
uint64_t covered_bits = 0;
int num_enumerators = 0;

// Try to find an exact match for the value.
// At the same time, we're applying a heuristic to determine whether we want
// to print this enum as a bitfield. We're likely dealing with a bitfield if
// every enumerator is either a one bit value or a superset of the previous
// enumerators. Also 0 doesn't make sense when the enumerators are used as
// flags.
for (auto *enumerator : enum_decl->enumerators()) {
  uint64_t val = enumerator->getInitVal().getSExtValue();
  val = llvm::SignExtend64(val, 8*byte_size);
  if (llvm::countPopulation(val) != 1 && (val & ~covered_bits) != 0)
    can_be_bitfield = false;
  covered_bits |= val;
  ++num_enumerators;
  if (val == enum_svalue) {
    // Found an exact match, that's all we need to do.
    s->PutCString(enumerator->getNameAsString());
    return true;
  }
}

// Unsigned values make more sense for flags.
offset = byte_offset;
const uint64_t enum_uvalue = data.GetMaxU64Bitfield(
    &offset, byte_size, bitfield_bit_size, bitfield_bit_offset);

// No exact match, but we don't think this is a bitfield. Print the value as
// decimal.
if (!can_be_bitfield) {
  if (qual_type->isSignedIntegerOrEnumerationType())
    s->Printf("%" PRIi64"lli", enum_svalue);
  else
    s->Printf("%" PRIu64"llu", enum_uvalue);
  return true;
}

uint64_t remaining_value = enum_uvalue;
std::vector<std::pair<uint64_t, llvm::StringRef>> values;
values.reserve(num_enumerators);
for (auto *enumerator : enum_decl->enumerators())
  if (auto val = enumerator->getInitVal().getZExtValue())
    values.emplace_back(val, enumerator->getName());

// Sort in reverse order of the number of the population count,  so that in
// `enum {A, B, ALL = A|B }` we visit ALL first. Use a stable sort so that
// A | C where A is declared before C is displayed in this order.
std::stable_sort(values.begin(), values.end(), [](const auto &a, const auto &b) {
      return llvm::countPopulation(a.first) > llvm::countPopulation(b.first);
    });

for (const auto &val : values) {
  if ((remaining_value & val.first) != val.first)
    continue;
  remaining_value &= ~val.first;
  s->PutCString(val.second);
  if (remaining_value)
    s->PutCString(" | ");
}

// If there is a remainder that is not covered by the value, print it as hex.
if (remaining_value)
  s->Printf("0x%" PRIx64"llx", remaining_value);

return true;
8868}

8870bool TypeSystemClang::DumpTypeValue(
  lldb::opaque_compiler_type_t type, Stream *s, lldb::Format format,
  const lldb_private::DataExtractor &data, lldb::offset_t byte_offset,
  size_t byte_size, uint32_t bitfield_bit_size, uint32_t bitfield_bit_offset,
  ExecutionContextScope *exe_scope) {
if (!type)
  return false;
if (IsAggregateType(type)) {
  return false;
} else {
  clang::QualType qual_type(GetQualType(type));

  const clang::Type::TypeClass type_class = qual_type->getTypeClass();

  if (type_class == clang::Type::Elaborated) {
    qual_type = llvm::cast<clang::ElaboratedType>(qual_type)->getNamedType();
    return DumpTypeValue(qual_type.getAsOpaquePtr(), s, format, data, byte_offset, byte_size,
                         bitfield_bit_size, bitfield_bit_offset, exe_scope);
  }

  switch (type_class) {
  case clang::Type::Typedef: {
    clang::QualType typedef_qual_type =
        llvm::cast<clang::TypedefType>(qual_type)
            ->getDecl()
            ->getUnderlyingType();
    CompilerType typedef_clang_type = GetType(typedef_qual_type);
    if (format == eFormatDefault)
      format = typedef_clang_type.GetFormat();
    clang::TypeInfo typedef_type_info =
        getASTContext().getTypeInfo(typedef_qual_type);
    uint64_t typedef_byte_size = typedef_type_info.Width / 8;

    return typedef_clang_type.DumpTypeValue(
        s,
        format,            // The format with which to display the element
        data,              // Data buffer containing all bytes for this type
        byte_offset,       // Offset into "data" where to grab value from
        typedef_byte_size, // Size of this type in bytes
        bitfield_bit_size, // Size in bits of a bitfield value, if zero don't
                           // treat as a bitfield
        bitfield_bit_offset, // Offset in bits of a bitfield value if
                             // bitfield_bit_size != 0
        exe_scope);
  } break;

  case clang::Type::Enum:
    // If our format is enum or default, show the enumeration value as its
    // enumeration string value, else just display it as requested.
    if ((format == eFormatEnum || format == eFormatDefault) &&
        GetCompleteType(type))
      return DumpEnumValue(qual_type, s, data, byte_offset, byte_size,
                           bitfield_bit_offset, bitfield_bit_size);
    // format was not enum, just fall through and dump the value as
    // requested....
    LLVM_FALLTHROUGH[[gnu::fallthrough]];

  default:
    // We are down to a scalar type that we just need to display.
    {
      uint32_t item_count = 1;
      // A few formats, we might need to modify our size and count for
      // depending
      // on how we are trying to display the value...
      switch (format) {
      default:
      case eFormatBoolean:
      case eFormatBinary:
      case eFormatComplex:
      case eFormatCString: // NULL terminated C strings
      case eFormatDecimal:
      case eFormatEnum:
      case eFormatHex:
      case eFormatHexUppercase:
      case eFormatFloat:
      case eFormatOctal:
      case eFormatOSType:
      case eFormatUnsigned:
      case eFormatPointer:
      case eFormatVectorOfChar:
      case eFormatVectorOfSInt8:
      case eFormatVectorOfUInt8:
      case eFormatVectorOfSInt16:
      case eFormatVectorOfUInt16:
      case eFormatVectorOfSInt32:
      case eFormatVectorOfUInt32:
      case eFormatVectorOfSInt64:
      case eFormatVectorOfUInt64:
      case eFormatVectorOfFloat32:
      case eFormatVectorOfFloat64:
      case eFormatVectorOfUInt128:
        break;

      case eFormatChar:
      case eFormatCharPrintable:
      case eFormatCharArray:
      case eFormatBytes:
      case eFormatBytesWithASCII:
        item_count = byte_size;
        byte_size = 1;
        break;

      case eFormatUnicode16:
        item_count = byte_size / 2;
        byte_size = 2;
        break;

      case eFormatUnicode32:
        item_count = byte_size / 4;
        byte_size = 4;
        break;
      }
      return DumpDataExtractor(data, s, byte_offset, format, byte_size,
                               item_count, UINT32_MAX0xffffffffU, LLDB_INVALID_ADDRESS0xffffffffffffffffULL,
                               bitfield_bit_size, bitfield_bit_offset,
                               exe_scope);
    }
    break;
  }
}
return false;
8991}

8993void TypeSystemClang::DumpSummary(lldb::opaque_compiler_type_t type,
                                ExecutionContext *exe_ctx, Stream *s,
                                const lldb_private::DataExtractor &data,
                                lldb::offset_t data_byte_offset,
                                size_t data_byte_size) {
uint32_t length = 0;
if (IsCStringType(type, length)) {
  if (exe_ctx) {
    Process *process = exe_ctx->GetProcessPtr();
    if (process) {
      lldb::offset_t offset = data_byte_offset;
      lldb::addr_t pointer_address = data.GetMaxU64(&offset, data_byte_size);
      std::vector<uint8_t> buf;
      if (length > 0)
        buf.resize(length);
      else
        buf.resize(256);

      DataExtractor cstr_data(&buf.front(), buf.size(),
                              process->GetByteOrder(), 4);
      buf.back() = '\0';
      size_t bytes_read;
      size_t total_cstr_len = 0;
      Status error;
      while ((bytes_read = process->ReadMemory(pointer_address, &buf.front(),
                                               buf.size(), error)) > 0) {
        const size_t len = strlen((const char *)&buf.front());
        if (len == 0)
          break;
        if (total_cstr_len == 0)
          s->PutCString(" \"");
        DumpDataExtractor(cstr_data, s, 0, lldb::eFormatChar, 1, len,
                          UINT32_MAX0xffffffffU, LLDB_INVALID_ADDRESS0xffffffffffffffffULL, 0, 0);
        total_cstr_len += len;
        if (len < buf.size())
          break;
        pointer_address += total_cstr_len;
      }
      if (total_cstr_len > 0)
        s->PutChar('"');
    }
  }
}
9036}

9038void TypeSystemClang::DumpTypeDescription(lldb::opaque_compiler_type_t type,
                                        lldb::DescriptionLevel level) {
StreamFile s(stdout(&__sF[1]), false);
DumpTypeDescription(type, &s, level);

CompilerType ct(this, type);
const clang::Type *clang_type = ClangUtil::GetQualType(ct).getTypePtr();
ClangASTMetadata *metadata = GetMetadata(clang_type);
if (metadata) {
  metadata->Dump(&s);
}
9049}

9051void TypeSystemClang::DumpTypeDescription(lldb::opaque_compiler_type_t type,
                                        Stream *s,
                                        lldb::DescriptionLevel level) {
if (type) {
  clang::QualType qual_type =
      RemoveWrappingTypes(GetQualType(type), {clang::Type::Typedef});

  llvm::SmallVector<char, 1024> buf;
  llvm::raw_svector_ostream llvm_ostrm(buf);

  const clang::Type::TypeClass type_class = qual_type->getTypeClass();
  switch (type_class) {
  case clang::Type::ObjCObject:
  case clang::Type::ObjCInterface: {
    GetCompleteType(type);

    auto *objc_class_type =
        llvm::dyn_cast<clang::ObjCObjectType>(qual_type.getTypePtr());
    assert(objc_class_type)((void)0);
    if (!objc_class_type)
      break;
    clang::ObjCInterfaceDecl *class_interface_decl =
          objc_class_type->getInterface();
    if (!class_interface_decl)
      break;
    if (level == eDescriptionLevelVerbose)
      class_interface_decl->dump(llvm_ostrm);
    else
      class_interface_decl->print(llvm_ostrm,
                                  getASTContext().getPrintingPolicy(),
                                  s->GetIndentLevel());
  } break;

  case clang::Type::Typedef: {
    auto *typedef_type = qual_type->getAs<clang::TypedefType>();
    if (!typedef_type)
      break;
    const clang::TypedefNameDecl *typedef_decl = typedef_type->getDecl();
    if (level == eDescriptionLevelVerbose)
      typedef_decl->dump(llvm_ostrm);
    else {
      std::string clang_typedef_name(GetTypeNameForDecl(typedef_decl));
      if (!clang_typedef_name.empty()) {
        s->PutCString("typedef ");
        s->PutCString(clang_typedef_name);
      }
    }
  } break;

  case clang::Type::Record: {
    GetCompleteType(type);

    auto *record_type = llvm::cast<clang::RecordType>(qual_type.getTypePtr());
    const clang::RecordDecl *record_decl = record_type->getDecl();
    if (level == eDescriptionLevelVerbose)
      record_decl->dump(llvm_ostrm);
    else {
      if (auto *cxx_record_decl =
              llvm::dyn_cast<clang::CXXRecordDecl>(record_decl))
        cxx_record_decl->print(llvm_ostrm,
                               getASTContext().getPrintingPolicy(),
                               s->GetIndentLevel());
      else
        record_decl->print(llvm_ostrm, getASTContext().getPrintingPolicy(),
                           s->GetIndentLevel());
    }
  } break;

  default: {
    if (auto *tag_type =
            llvm::dyn_cast<clang::TagType>(qual_type.getTypePtr())) {
      if (clang::TagDecl *tag_decl = tag_type->getDecl()) {
        if (level == eDescriptionLevelVerbose)
          tag_decl->dump(llvm_ostrm);
        else
          tag_decl->print(llvm_ostrm, 0);
      }
    } else {
      if (level == eDescriptionLevelVerbose)
        qual_type->dump(llvm_ostrm, getASTContext());
      else {
        std::string clang_type_name(qual_type.getAsString());
        if (!clang_type_name.empty())
          s->PutCString(clang_type_name);
      }
    }
  }
  }

  if (buf.size() > 0) {
    s->Write(buf.data(), buf.size());
  }
9143}
9144}

9146void TypeSystemClang::DumpTypeName(const CompilerType &type) {
if (ClangUtil::IsClangType(type)) {
  clang::QualType qual_type(
      ClangUtil::GetCanonicalQualType(ClangUtil::RemoveFastQualifiers(type)));

  const clang::Type::TypeClass type_class = qual_type->getTypeClass();
  switch (type_class) {
  case clang::Type::Record: {
    const clang::CXXRecordDecl *cxx_record_decl =
        qual_type->getAsCXXRecordDecl();
    if (cxx_record_decl)
      printf("class %s", cxx_record_decl->getName().str().c_str());
  } break;

  case clang::Type::Enum: {
    clang::EnumDecl *enum_decl =
        llvm::cast<clang::EnumType>(qual_type)->getDecl();
    if (enum_decl) {
      printf("enum %s", enum_decl->getName().str().c_str());
    }
  } break;

  case clang::Type::ObjCObject:
  case clang::Type::ObjCInterface: {
    const clang::ObjCObjectType *objc_class_type =
        llvm::dyn_cast<clang::ObjCObjectType>(qual_type);
    if (objc_class_type) {
      clang::ObjCInterfaceDecl *class_interface_decl =
          objc_class_type->getInterface();
      // We currently can't complete objective C types through the newly
      // added ASTContext because it only supports TagDecl objects right
      // now...
      if (class_interface_decl)
        printf("@class %s", class_interface_decl->getName().str().c_str());
    }
  } break;

  case clang::Type::Typedef:
    printf("typedef %s", llvm::cast<clang::TypedefType>(qual_type)
                             ->getDecl()
                             ->getName()
                             .str()
                             .c_str());
    break;

  case clang::Type::Auto:
    printf("auto ");
    return DumpTypeName(CompilerType(type.GetTypeSystem(),
                                     llvm::cast<clang::AutoType>(qual_type)
                                         ->getDeducedType()
                                         .getAsOpaquePtr()));

  case clang::Type::Elaborated:
    printf("elaborated ");
    return DumpTypeName(CompilerType(
        type.GetTypeSystem(), llvm::cast<clang::ElaboratedType>(qual_type)
                                  ->getNamedType()
                                  .getAsOpaquePtr()));

  case clang::Type::Paren:
    printf("paren ");
    return DumpTypeName(CompilerType(
        type.GetTypeSystem(),
        llvm::cast<clang::ParenType>(qual_type)->desugar().getAsOpaquePtr()));

  default:
    printf("TypeSystemClang::DumpTypeName() type_class = %u", type_class);
    break;
  }
}
9216}

9218clang::ClassTemplateDecl *TypeSystemClang::ParseClassTemplateDecl(
  clang::DeclContext *decl_ctx, OptionalClangModuleID owning_module,
  lldb::AccessType access_type, const char *parent_name, int tag_decl_kind,
  const TypeSystemClang::TemplateParameterInfos &template_param_infos) {
if (template_param_infos.IsValid()) {
  std::string template_basename(parent_name);
  template_basename.erase(template_basename.find('<'));

  return CreateClassTemplateDecl(decl_ctx, owning_module, access_type,
                                 template_basename.c_str(), tag_decl_kind,
                                 template_param_infos);
}
return nullptr;
9231}

9233void TypeSystemClang::CompleteTagDecl(clang::TagDecl *decl) {
SymbolFile *sym_file = GetSymbolFile();
if (sym_file) {
  CompilerType clang_type = GetTypeForDecl(decl);
  if (clang_type)
    sym_file->CompleteType(clang_type);
}
9240}

9242void TypeSystemClang::CompleteObjCInterfaceDecl(
  clang::ObjCInterfaceDecl *decl) {
SymbolFile *sym_file = GetSymbolFile();
if (sym_file) {
  CompilerType clang_type = GetTypeForDecl(decl);
  if (clang_type)
    sym_file->CompleteType(clang_type);
}
9250}

9252DWARFASTParser *TypeSystemClang::GetDWARFParser() {
if (!m_dwarf_ast_parser_up)
  m_dwarf_ast_parser_up = std::make_unique<DWARFASTParserClang>(*this);
return m_dwarf_ast_parser_up.get();
9256}

9258PDBASTParser *TypeSystemClang::GetPDBParser() {
if (!m_pdb_ast_parser_up)
  m_pdb_ast_parser_up = std::make_unique<PDBASTParser>(*this);
return m_pdb_ast_parser_up.get();
9262}

9264bool TypeSystemClang::LayoutRecordType(
  const clang::RecordDecl *record_decl, uint64_t &bit_size,
  uint64_t &alignment,
  llvm::DenseMap<const clang::FieldDecl *, uint64_t> &field_offsets,
  llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>
      &base_offsets,
  llvm::DenseMap<const clang::CXXRecordDecl *, clang::CharUnits>
      &vbase_offsets) {
lldb_private::ClangASTImporter *importer = nullptr;
if (m_dwarf_ast_parser_up)
  importer = &m_dwarf_ast_parser_up->GetClangASTImporter();
if (!importer && m_pdb_ast_parser_up)
  importer = &m_pdb_ast_parser_up->GetClangASTImporter();
if (!importer)
  return false;

return importer->LayoutRecordType(record_decl, bit_size, alignment,
                                  field_offsets, base_offsets, vbase_offsets);
9282}

9284// CompilerDecl override functions

9286ConstString TypeSystemClang::DeclGetName(void *opaque_decl) {
if (opaque_decl) {
  clang::NamedDecl *nd =
      llvm::dyn_cast<NamedDecl>((clang::Decl *)opaque_decl);
  if (nd != nullptr)
    return ConstString(nd->getDeclName().getAsString());
}
return ConstString();
9294}

9296ConstString TypeSystemClang::DeclGetMangledName(void *opaque_decl) {
if (opaque_decl) {
  clang::NamedDecl *nd =
      llvm::dyn_cast<clang::NamedDecl>((clang::Decl *)opaque_decl);
  if (nd != nullptr && !llvm::isa<clang::ObjCMethodDecl>(nd)) {
    clang::MangleContext *mc = getMangleContext();
    if (mc && mc->shouldMangleCXXName(nd)) {
      llvm::SmallVector<char, 1024> buf;
      llvm::raw_svector_ostream llvm_ostrm(buf);
      if (llvm::isa<clang::CXXConstructorDecl>(nd)) {
        mc->mangleName(
            clang::GlobalDecl(llvm::dyn_cast<clang::CXXConstructorDecl>(nd),
                              Ctor_Complete),
            llvm_ostrm);
      } else if (llvm::isa<clang::CXXDestructorDecl>(nd)) {
        mc->mangleName(
            clang::GlobalDecl(llvm::dyn_cast<clang::CXXDestructorDecl>(nd),
                              Dtor_Complete),
            llvm_ostrm);
      } else {
        mc->mangleName(nd, llvm_ostrm);
      }
      if (buf.size() > 0)
        return ConstString(buf.data(), buf.size());
    }
  }
}
return ConstString();
9324}

9326CompilerDeclContext TypeSystemClang::DeclGetDeclContext(void *opaque_decl) {
if (opaque_decl)
  return CreateDeclContext(((clang::Decl *)opaque_decl)->getDeclContext());
return CompilerDeclContext();
9330}

9332CompilerType TypeSystemClang::DeclGetFunctionReturnType(void *opaque_decl) {
if (clang::FunctionDecl *func_decl =
        llvm::dyn_cast<clang::FunctionDecl>((clang::Decl *)opaque_decl))
  return GetType(func_decl->getReturnType());
if (clang::ObjCMethodDecl *objc_method =
        llvm::dyn_cast<clang::ObjCMethodDecl>((clang::Decl *)opaque_decl))
  return GetType(objc_method->getReturnType());
else
  return CompilerType();
9341}

9343size_t TypeSystemClang::DeclGetFunctionNumArguments(void *opaque_decl) {
if (clang::FunctionDecl *func_decl =
        llvm::dyn_cast<clang::FunctionDecl>((clang::Decl *)opaque_decl))
  return func_decl->param_size();
if (clang::ObjCMethodDecl *objc_method =
        llvm::dyn_cast<clang::ObjCMethodDecl>((clang::Decl *)opaque_decl))
  return objc_method->param_size();
else
  return 0;
9352}

9354CompilerType TypeSystemClang::DeclGetFunctionArgumentType(void *opaque_decl,
                                                        size_t idx) {
if (clang::FunctionDecl *func_decl =
        llvm::dyn_cast<clang::FunctionDecl>((clang::Decl *)opaque_decl)) {
  if (idx < func_decl->param_size()) {
    ParmVarDecl *var_decl = func_decl->getParamDecl(idx);
    if (var_decl)
      return GetType(var_decl->getOriginalType());
  }
} else if (clang::ObjCMethodDecl *objc_method =
               llvm::dyn_cast<clang::ObjCMethodDecl>(
                   (clang::Decl *)opaque_decl)) {
  if (idx < objc_method->param_size())
    return GetType(objc_method->parameters()[idx]->getOriginalType());
}
return CompilerType();
9370}

9372// CompilerDeclContext functions

9374std::vector<CompilerDecl> TypeSystemClang::DeclContextFindDeclByName(
  void *opaque_decl_ctx, ConstString name, const bool ignore_using_decls) {
std::vector<CompilerDecl> found_decls;
SymbolFile *symbol_file = GetSymbolFile();
if (opaque_decl_ctx && symbol_file) {
  DeclContext *root_decl_ctx = (DeclContext *)opaque_decl_ctx;
  std::set<DeclContext *> searched;
  std::multimap<DeclContext *, DeclContext *> search_queue;

  for (clang::DeclContext *decl_context = root_decl_ctx;
       decl_context != nullptr && found_decls.empty();
       decl_context = decl_context->getParent()) {
    search_queue.insert(std::make_pair(decl_context, decl_context));

    for (auto it = search_queue.find(decl_context); it != search_queue.end();
         it++) {
      if (!searched.insert(it->second).second)
        continue;
      symbol_file->ParseDeclsForContext(
          CreateDeclContext(it->second));

      for (clang::Decl *child : it->second->decls()) {
        if (clang::UsingDirectiveDecl *ud =
                llvm::dyn_cast<clang::UsingDirectiveDecl>(child)) {
          if (ignore_using_decls)
            continue;
          clang::DeclContext *from = ud->getCommonAncestor();
          if (searched.find(ud->getNominatedNamespace()) == searched.end())
            search_queue.insert(
                std::make_pair(from, ud->getNominatedNamespace()));
        } else if (clang::UsingDecl *ud =
                       llvm::dyn_cast<clang::UsingDecl>(child)) {
          if (ignore_using_decls)
            continue;
          for (clang::UsingShadowDecl *usd : ud->shadows()) {
            clang::Decl *target = usd->getTargetDecl();
            if (clang::NamedDecl *nd =
                    llvm::dyn_cast<clang::NamedDecl>(target)) {
              IdentifierInfo *ii = nd->getIdentifier();
              if (ii != nullptr &&
                  ii->getName().equals(name.AsCString(nullptr)))
                found_decls.push_back(GetCompilerDecl(nd));
            }
          }
        } else if (clang::NamedDecl *nd =
                       llvm::dyn_cast<clang::NamedDecl>(child)) {
          IdentifierInfo *ii = nd->getIdentifier();
          if (ii != nullptr && ii->getName().equals(name.AsCString(nullptr)))
            found_decls.push_back(GetCompilerDecl(nd));
        }
      }
    }
  }
}
return found_decls;
9429}

9431// Look for child_decl_ctx's lookup scope in frame_decl_ctx and its parents,
9432// and return the number of levels it took to find it, or
9433// LLDB_INVALID_DECL_LEVEL if not found.  If the decl was imported via a using
9434// declaration, its name and/or type, if set, will be used to check that the
9435// decl found in the scope is a match.
9436//
9437// The optional name is required by languages (like C++) to handle using
9438// declarations like:
9439//
9440//     void poo();
9441//     namespace ns {
9442//         void foo();
9443//         void goo();
9444//     }
9445//     void bar() {
9446//         using ns::foo;
9447//         // CountDeclLevels returns 0 for 'foo', 1 for 'poo', and
9448//         // LLDB_INVALID_DECL_LEVEL for 'goo'.
9449//     }
9450//
9451// The optional type is useful in the case that there's a specific overload
9452// that we're looking for that might otherwise be shadowed, like:
9453//
9454//     void foo(int);
9455//     namespace ns {
9456//         void foo();
9457//     }
9458//     void bar() {
9459//         using ns::foo;
9460//         // CountDeclLevels returns 0 for { 'foo', void() },
9461//         // 1 for { 'foo', void(int) }, and
9462//         // LLDB_INVALID_DECL_LEVEL for { 'foo', void(int, int) }.
9463//     }
9464//
9465// NOTE: Because file statics are at the TranslationUnit along with globals, a
9466// function at file scope will return the same level as a function at global
9467// scope. Ideally we'd like to treat the file scope as an additional scope just
9468// below the global scope.  More work needs to be done to recognise that, if
9469// the decl we're trying to look up is static, we should compare its source
9470// file with that of the current scope and return a lower number for it.
9471uint32_t TypeSystemClang::CountDeclLevels(clang::DeclContext *frame_decl_ctx,
                                        clang::DeclContext *child_decl_ctx,
                                        ConstString *child_name,
                                        CompilerType *child_type) {
SymbolFile *symbol_file = GetSymbolFile();
if (frame_decl_ctx && symbol_file) {
  std::set<DeclContext *> searched;
  std::multimap<DeclContext *, DeclContext *> search_queue;

  // Get the lookup scope for the decl we're trying to find.
  clang::DeclContext *parent_decl_ctx = child_decl_ctx->getParent();

  // Look for it in our scope's decl context and its parents.
  uint32_t level = 0;
  for (clang::DeclContext *decl_ctx = frame_decl_ctx; decl_ctx != nullptr;
       decl_ctx = decl_ctx->getParent()) {
    if (!decl_ctx->isLookupContext())
      continue;
    if (decl_ctx == parent_decl_ctx)
      // Found it!
      return level;
    search_queue.insert(std::make_pair(decl_ctx, decl_ctx));
    for (auto it = search_queue.find(decl_ctx); it != search_queue.end();
         it++) {
      if (searched.find(it->second) != searched.end())
        continue;

      // Currently DWARF has one shared translation unit for all Decls at top
      // level, so this would erroneously find using statements anywhere.  So
      // don't look at the top-level translation unit.
      // TODO fix this and add a testcase that depends on it.

      if (llvm::isa<clang::TranslationUnitDecl>(it->second))
        continue;

      searched.insert(it->second);
      symbol_file->ParseDeclsForContext(
          CreateDeclContext(it->second));

      for (clang::Decl *child : it->second->decls()) {
        if (clang::UsingDirectiveDecl *ud =
                llvm::dyn_cast<clang::UsingDirectiveDecl>(child)) {
          clang::DeclContext *ns = ud->getNominatedNamespace();
          if (ns == parent_decl_ctx)
            // Found it!
            return level;
          clang::DeclContext *from = ud->getCommonAncestor();
          if (searched.find(ns) == searched.end())
            search_queue.insert(std::make_pair(from, ns));
        } else if (child_name) {
          if (clang::UsingDecl *ud =
                  llvm::dyn_cast<clang::UsingDecl>(child)) {
            for (clang::UsingShadowDecl *usd : ud->shadows()) {
              clang::Decl *target = usd->getTargetDecl();
              clang::NamedDecl *nd = llvm::dyn_cast<clang::NamedDecl>(target);
              if (!nd)
                continue;
              // Check names.
              IdentifierInfo *ii = nd->getIdentifier();
              if (ii == nullptr ||
                  !ii->getName().equals(child_name->AsCString(nullptr)))
                continue;
              // Check types, if one was provided.
              if (child_type) {
                CompilerType clang_type = GetTypeForDecl(nd);
                if (!AreTypesSame(clang_type, *child_type,
                                  /*ignore_qualifiers=*/true))
                  continue;
              }
              // Found it!
              return level;
            }
          }
        }
      }
    }
    ++level;
  }
}
return LLDB_INVALID_DECL_LEVEL0xffffffffU;
9551}

9553ConstString TypeSystemClang::DeclContextGetName(void *opaque_decl_ctx) {
if (opaque_decl_ctx) {
  clang::NamedDecl *named_decl =
      llvm::dyn_cast<clang::NamedDecl>((clang::DeclContext *)opaque_decl_ctx);
  if (named_decl)
    return ConstString(named_decl->getName());
}
return ConstString();
9561}

9563ConstString
9564TypeSystemClang::DeclContextGetScopeQualifiedName(void *opaque_decl_ctx) {
if (opaque_decl_ctx) {
  clang::NamedDecl *named_decl =
      llvm::dyn_cast<clang::NamedDecl>((clang::DeclContext *)opaque_decl_ctx);
  if (named_decl)
    return ConstString(GetTypeNameForDecl(named_decl));
}
return ConstString();
9572}

9574bool TypeSystemClang::DeclContextIsClassMethod(
  void *opaque_decl_ctx, lldb::LanguageType *language_ptr,
  bool *is_instance_method_ptr, ConstString *language_object_name_ptr) {
if (opaque_decl_ctx) {
  clang::DeclContext *decl_ctx = (clang::DeclContext *)opaque_decl_ctx;
  if (ObjCMethodDecl *objc_method =
          llvm::dyn_cast<clang::ObjCMethodDecl>(decl_ctx)) {
    if (is_instance_method_ptr)
      *is_instance_method_ptr = objc_method->isInstanceMethod();
    if (language_ptr)
      *language_ptr = eLanguageTypeObjC;
    if (language_object_name_ptr)
      language_object_name_ptr->SetCString("self");
    return true;
  } else if (CXXMethodDecl *cxx_method =
                 llvm::dyn_cast<clang::CXXMethodDecl>(decl_ctx)) {
    if (is_instance_method_ptr)
      *is_instance_method_ptr = cxx_method->isInstance();
    if (language_ptr)
      *language_ptr = eLanguageTypeC_plus_plus;
    if (language_object_name_ptr)
      language_object_name_ptr->SetCString("this");
    return true;
  } else if (clang::FunctionDecl *function_decl =
                 llvm::dyn_cast<clang::FunctionDecl>(decl_ctx)) {
    ClangASTMetadata *metadata = GetMetadata(function_decl);
    if (metadata && metadata->HasObjectPtr()) {
      if (is_instance_method_ptr)
        *is_instance_method_ptr = true;
      if (language_ptr)
        *language_ptr = eLanguageTypeObjC;
      if (language_object_name_ptr)
        language_object_name_ptr->SetCString(metadata->GetObjectPtrName());
      return true;
    }
  }
}
return false;
9612}

9614bool TypeSystemClang::DeclContextIsContainedInLookup(
  void *opaque_decl_ctx, void *other_opaque_decl_ctx) {
auto *decl_ctx = (clang::DeclContext *)opaque_decl_ctx;
auto *other = (clang::DeclContext *)other_opaque_decl_ctx;

do {
  // A decl context always includes its own contents in its lookup.
  if (decl_ctx == other)
    return true;

  // If we have an inline namespace, then the lookup of the parent context
  // also includes the inline namespace contents.
} while (other->isInlineNamespace() && (other = other->getParent()));

return false;
9629}

9631static bool IsClangDeclContext(const CompilerDeclContext &dc) {
return dc.IsValid() && isa<TypeSystemClang>(dc.GetTypeSystem());
9633}

9635clang::DeclContext *
9636TypeSystemClang::DeclContextGetAsDeclContext(const CompilerDeclContext &dc) {
if (IsClangDeclContext(dc))
  return (clang::DeclContext *)dc.GetOpaqueDeclContext();
return nullptr;
9640}

9642ObjCMethodDecl *
9643TypeSystemClang::DeclContextGetAsObjCMethodDecl(const CompilerDeclContext &dc) {
if (IsClangDeclContext(dc))
  return llvm::dyn_cast<clang::ObjCMethodDecl>(
      (clang::DeclContext *)dc.GetOpaqueDeclContext());
return nullptr;
9648}

9650CXXMethodDecl *
9651TypeSystemClang::DeclContextGetAsCXXMethodDecl(const CompilerDeclContext &dc) {
if (IsClangDeclContext(dc))
  return llvm::dyn_cast<clang::CXXMethodDecl>(
      (clang::DeclContext *)dc.GetOpaqueDeclContext());
return nullptr;
9656}

9658clang::FunctionDecl *
9659TypeSystemClang::DeclContextGetAsFunctionDecl(const CompilerDeclContext &dc) {
if (IsClangDeclContext(dc))
  return llvm::dyn_cast<clang::FunctionDecl>(
      (clang::DeclContext *)dc.GetOpaqueDeclContext());
return nullptr;
9664}

9666clang::NamespaceDecl *
9667TypeSystemClang::DeclContextGetAsNamespaceDecl(const CompilerDeclContext &dc) {
if (IsClangDeclContext(dc))
  return llvm::dyn_cast<clang::NamespaceDecl>(
      (clang::DeclContext *)dc.GetOpaqueDeclContext());
return nullptr;
9672}

9674ClangASTMetadata *
9675TypeSystemClang::DeclContextGetMetaData(const CompilerDeclContext &dc,
                                      const Decl *object) {
TypeSystemClang *ast = llvm::cast<TypeSystemClang>(dc.GetTypeSystem());
return ast->GetMetadata(object);
9679}

9681clang::ASTContext *
9682TypeSystemClang::DeclContextGetTypeSystemClang(const CompilerDeclContext &dc) {
TypeSystemClang *ast =
    llvm::dyn_cast_or_null<TypeSystemClang>(dc.GetTypeSystem());
if (ast)
  return &ast->getASTContext();
return nullptr;
9688}

9690namespace {
9691/// A specialized scratch AST used within ScratchTypeSystemClang.
9692/// These are the ASTs backing the different IsolatedASTKinds. They behave
9693/// like a normal ScratchTypeSystemClang but they don't own their own
9694/// persistent  storage or target reference.
9695class SpecializedScratchAST : public TypeSystemClang {
9696public:
/// \param name The display name of the TypeSystemClang instance.
/// \param triple The triple used for the TypeSystemClang instance.
/// \param ast_source The ClangASTSource that should be used to complete
///                   type information.
SpecializedScratchAST(llvm::StringRef name, llvm::Triple triple,
                      std::unique_ptr<ClangASTSource> ast_source)
    : TypeSystemClang(name, triple),
      m_scratch_ast_source_up(std::move(ast_source)) {
  // Setup the ClangASTSource to complete this AST.
  m_scratch_ast_source_up->InstallASTContext(*this);
  llvm::IntrusiveRefCntPtr<clang::ExternalASTSource> proxy_ast_source(
      m_scratch_ast_source_up->CreateProxy());
  SetExternalSource(proxy_ast_source);
}

/// The ExternalASTSource that performs lookups and completes types.
std::unique_ptr<ClangASTSource> m_scratch_ast_source_up;
9714};
9715} // namespace

9717char ScratchTypeSystemClang::ID;
9718const llvm::NoneType ScratchTypeSystemClang::DefaultAST = llvm::None;

9720ScratchTypeSystemClang::ScratchTypeSystemClang(Target &target,
                                             llvm::Triple triple)
  : TypeSystemClang("scratch ASTContext", triple), m_triple(triple),
    m_target_wp(target.shared_from_this()),
    m_persistent_variables(
        new ClangPersistentVariables(target.shared_from_this())) {
m_scratch_ast_source_up = CreateASTSource();
m_scratch_ast_source_up->InstallASTContext(*this);
llvm::IntrusiveRefCntPtr<clang::ExternalASTSource> proxy_ast_source(
    m_scratch_ast_source_up->CreateProxy());
SetExternalSource(proxy_ast_source);
9731}

9733void ScratchTypeSystemClang::Finalize() {
TypeSystemClang::Finalize();
m_scratch_ast_source_up.reset();
9736}

9738TypeSystemClang *
9739ScratchTypeSystemClang::GetForTarget(Target &target,
                                   llvm::Optional<IsolatedASTKind> ast_kind,
                                   bool create_on_demand) {
auto type_system_or_err = target.GetScratchTypeSystemForLanguage(
    lldb::eLanguageTypeC, create_on_demand);
if (auto err = type_system_or_err.takeError()) {
  LLDB_LOG_ERROR(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_TARGET),do { ::lldb_private::Log *log_private = (lldb_private::GetLogIfAnyCategoriesSet
((1u << 22))); ::llvm::Error error_private = (std::move
(err)); if (log_private && error_private) { log_private
->FormatError(::std::move(error_private), "/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp"
, __func__, "Couldn't get scratch TypeSystemClang"); } else ::
llvm::consumeError(::std::move(error_private)); } while (0)
                 std::move(err), "Couldn't get scratch TypeSystemClang")do { ::lldb_private::Log *log_private = (lldb_private::GetLogIfAnyCategoriesSet
((1u << 22))); ::llvm::Error error_private = (std::move
(err)); if (log_private && error_private) { log_private
->FormatError(::std::move(error_private), "/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/lldb/source/Plugins/TypeSystem/Clang/TypeSystemClang.cpp"
, __func__, "Couldn't get scratch TypeSystemClang"); } else ::
llvm::consumeError(::std::move(error_private)); } while (0);
  return nullptr;
}
ScratchTypeSystemClang &scratch_ast =
    llvm::cast<ScratchTypeSystemClang>(type_system_or_err.get());
// If no dedicated sub-AST was requested, just return the main AST.
if (ast_kind == DefaultAST)
  return &scratch_ast;
// Search the sub-ASTs.
return &scratch_ast.GetIsolatedAST(*ast_kind);
9756}

9758UserExpression *ScratchTypeSystemClang::GetUserExpression(
  llvm::StringRef expr, llvm::StringRef prefix, lldb::LanguageType language,
  Expression::ResultType desired_type,
  const EvaluateExpressionOptions &options, ValueObject *ctx_obj) {
TargetSP target_sp = m_target_wp.lock();
if (!target_sp)
  return nullptr;

return new ClangUserExpression(*target_sp.get(), expr, prefix, language,
                               desired_type, options, ctx_obj);
9768}

9770FunctionCaller *ScratchTypeSystemClang::GetFunctionCaller(
  const CompilerType &return_type, const Address &function_address,
  const ValueList &arg_value_list, const char *name) {
TargetSP target_sp = m_target_wp.lock();
if (!target_sp)
  return nullptr;

Process *process = target_sp->GetProcessSP().get();
if (!process)
  return nullptr;

return new ClangFunctionCaller(*process, return_type, function_address,
                               arg_value_list, name);
9783}

9785std::unique_ptr<UtilityFunction>
9786ScratchTypeSystemClang::CreateUtilityFunction(std::string text,
                                            std::string name) {
TargetSP target_sp = m_target_wp.lock();
if (!target_sp)
  return {};

return std::make_unique<ClangUtilityFunction>(
    *target_sp.get(), std::move(text), std::move(name),
    target_sp->GetDebugUtilityExpression());
9795}

9797PersistentExpressionState *
9798ScratchTypeSystemClang::GetPersistentExpressionState() {
return m_persistent_variables.get();
9800}

9802void ScratchTypeSystemClang::ForgetSource(ASTContext *src_ctx,
                                        ClangASTImporter &importer) {
// Remove it as a source from the main AST.
importer.ForgetSource(&getASTContext(), src_ctx);
// Remove it as a source from all created sub-ASTs.
for (const auto &a : m_isolated_asts)
  importer.ForgetSource(&a.second->getASTContext(), src_ctx);
9809}

9811std::unique_ptr<ClangASTSource> ScratchTypeSystemClang::CreateASTSource() {
return std::make_unique<ClangASTSource>(
    m_target_wp.lock()->shared_from_this(),
    m_persistent_variables->GetClangASTImporter());
9815}

9817static llvm::StringRef
9818GetSpecializedASTName(ScratchTypeSystemClang::IsolatedASTKind feature) {
switch (feature) {
case ScratchTypeSystemClang::IsolatedASTKind::CppModules:
  return "scratch ASTContext for C++ module types";
}
llvm_unreachable("Unimplemented ASTFeature kind?")__builtin_unreachable();
9824}

9826TypeSystemClang &ScratchTypeSystemClang::GetIsolatedAST(
  ScratchTypeSystemClang::IsolatedASTKind feature) {
auto found_ast = m_isolated_asts.find(feature);
if (found_ast != m_isolated_asts.end())
  return *found_ast->second;

// Couldn't find the requested sub-AST, so create it now.
std::unique_ptr<TypeSystemClang> new_ast;
new_ast.reset(new SpecializedScratchAST(GetSpecializedASTName(feature),
                                        m_triple, CreateASTSource()));
m_isolated_asts[feature] = std::move(new_ast);
return *m_isolated_asts[feature];
9838}

←

/usr/src/gnu/usr.bin/clang/liblldbPluginTypeSystem/../../../llvm/clang/include/clang/AST/DeclBase.h

→

1//===- DeclBase.h - Base Classes for representing 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//  This file defines the Decl and DeclContext interfaces.
10//
11//===----------------------------------------------------------------------===//

13#ifndef LLVM_CLANG_AST_DECLBASE_H
14#define LLVM_CLANG_AST_DECLBASE_H

16#include "clang/AST/ASTDumperUtils.h"
17#include "clang/AST/AttrIterator.h"
18#include "clang/AST/DeclarationName.h"
19#include "clang/Basic/IdentifierTable.h"
20#include "clang/Basic/LLVM.h"
21#include "clang/Basic/SourceLocation.h"
22#include "clang/Basic/Specifiers.h"
23#include "llvm/ADT/ArrayRef.h"
24#include "llvm/ADT/PointerIntPair.h"
25#include "llvm/ADT/PointerUnion.h"
26#include "llvm/ADT/iterator.h"
27#include "llvm/ADT/iterator_range.h"
28#include "llvm/Support/Casting.h"
29#include "llvm/Support/Compiler.h"
30#include "llvm/Support/PrettyStackTrace.h"
31#include "llvm/Support/VersionTuple.h"
32#include <algorithm>
33#include <cassert>
34#include <cstddef>
35#include <iterator>
36#include <string>
37#include <type_traits>
38#include <utility>

40namespace clang {

42class ASTContext;
43class ASTMutationListener;
44class Attr;
45class BlockDecl;
46class DeclContext;
47class ExternalSourceSymbolAttr;
48class FunctionDecl;
49class FunctionType;
50class IdentifierInfo;
51enum Linkage : unsigned char;
52class LinkageSpecDecl;
53class Module;
54class NamedDecl;
55class ObjCCategoryDecl;
56class ObjCCategoryImplDecl;
57class ObjCContainerDecl;
58class ObjCImplDecl;
59class ObjCImplementationDecl;
60class ObjCInterfaceDecl;
61class ObjCMethodDecl;
62class ObjCProtocolDecl;
63struct PrintingPolicy;
64class RecordDecl;
65class SourceManager;
66class Stmt;
67class StoredDeclsMap;
68class TemplateDecl;
69class TemplateParameterList;
70class TranslationUnitDecl;
71class UsingDirectiveDecl;

73/// Captures the result of checking the availability of a
74/// declaration.
75enum AvailabilityResult {
AR_Available = 0,
AR_NotYetIntroduced,
AR_Deprecated,
AR_Unavailable
80};

82/// Decl - This represents one declaration (or definition), e.g. a variable,
83/// typedef, function, struct, etc.
84///
85/// Note: There are objects tacked on before the *beginning* of Decl
86/// (and its subclasses) in its Decl::operator new(). Proper alignment
87/// of all subclasses (not requiring more than the alignment of Decl) is
88/// asserted in DeclBase.cpp.
89class alignas(8) Decl {
90public:
/// Lists the kind of concrete classes of Decl.
enum Kind {
93#define DECL(DERIVED, BASE) DERIVED,
94#define ABSTRACT_DECL(DECL)
95#define DECL_RANGE(BASE, START, END) \
      first##BASE = START, last##BASE = END,
97#define LAST_DECL_RANGE(BASE, START, END) \
      first##BASE = START, last##BASE = END
99#include "clang/AST/DeclNodes.inc"
};

/// A placeholder type used to construct an empty shell of a
/// decl-derived type that will be filled in later (e.g., by some
/// deserialization method).
struct EmptyShell {};

/// IdentifierNamespace - The different namespaces in which
/// declarations may appear.  According to C99 6.2.3, there are
/// four namespaces, labels, tags, members and ordinary
/// identifiers.  C++ describes lookup completely differently:
/// certain lookups merely "ignore" certain kinds of declarations,
/// usually based on whether the declaration is of a type, etc.
///
/// These are meant as bitmasks, so that searches in
/// C++ can look into the "tag" namespace during ordinary lookup.
///
/// Decl currently provides 15 bits of IDNS bits.
enum IdentifierNamespace {
  /// Labels, declared with 'x:' and referenced with 'goto x'.
  IDNS_Label               = 0x0001,

  /// Tags, declared with 'struct foo;' and referenced with
  /// 'struct foo'.  All tags are also types.  This is what
  /// elaborated-type-specifiers look for in C.
  /// This also contains names that conflict with tags in the
  /// same scope but that are otherwise ordinary names (non-type
  /// template parameters and indirect field declarations).
  IDNS_Tag                 = 0x0002,

  /// Types, declared with 'struct foo', typedefs, etc.
  /// This is what elaborated-type-specifiers look for in C++,
  /// but note that it's ill-formed to find a non-tag.
  IDNS_Type                = 0x0004,

  /// Members, declared with object declarations within tag
  /// definitions.  In C, these can only be found by "qualified"
  /// lookup in member expressions.  In C++, they're found by
  /// normal lookup.
  IDNS_Member              = 0x0008,

  /// Namespaces, declared with 'namespace foo {}'.
  /// Lookup for nested-name-specifiers find these.
  IDNS_Namespace           = 0x0010,

  /// Ordinary names.  In C, everything that's not a label, tag,
  /// member, or function-local extern ends up here.
  IDNS_Ordinary            = 0x0020,

  /// Objective C \@protocol.
  IDNS_ObjCProtocol        = 0x0040,

  /// This declaration is a friend function.  A friend function
  /// declaration is always in this namespace but may also be in
  /// IDNS_Ordinary if it was previously declared.
  IDNS_OrdinaryFriend      = 0x0080,

  /// This declaration is a friend class.  A friend class
  /// declaration is always in this namespace but may also be in
  /// IDNS_Tag|IDNS_Type if it was previously declared.
  IDNS_TagFriend           = 0x0100,

  /// This declaration is a using declaration.  A using declaration
  /// *introduces* a number of other declarations into the current
  /// scope, and those declarations use the IDNS of their targets,
  /// but the actual using declarations go in this namespace.
  IDNS_Using               = 0x0200,

  /// This declaration is a C++ operator declared in a non-class
  /// context.  All such operators are also in IDNS_Ordinary.
  /// C++ lexical operator lookup looks for these.
  IDNS_NonMemberOperator   = 0x0400,

  /// This declaration is a function-local extern declaration of a
  /// variable or function. This may also be IDNS_Ordinary if it
  /// has been declared outside any function. These act mostly like
  /// invisible friend declarations, but are also visible to unqualified
  /// lookup within the scope of the declaring function.
  IDNS_LocalExtern         = 0x0800,

  /// This declaration is an OpenMP user defined reduction construction.
  IDNS_OMPReduction        = 0x1000,

  /// This declaration is an OpenMP user defined mapper.
  IDNS_OMPMapper           = 0x2000,
};

/// ObjCDeclQualifier - 'Qualifiers' written next to the return and
/// parameter types in method declarations.  Other than remembering
/// them and mangling them into the method's signature string, these
/// are ignored by the compiler; they are consumed by certain
/// remote-messaging frameworks.
///
/// in, inout, and out are mutually exclusive and apply only to
/// method parameters.  bycopy and byref are mutually exclusive and
/// apply only to method parameters (?).  oneway applies only to
/// results.  All of these expect their corresponding parameter to
/// have a particular type.  None of this is currently enforced by
/// clang.
///
/// This should be kept in sync with ObjCDeclSpec::ObjCDeclQualifier.
enum ObjCDeclQualifier {
  OBJC_TQ_None = 0x0,
  OBJC_TQ_In = 0x1,
  OBJC_TQ_Inout = 0x2,
  OBJC_TQ_Out = 0x4,
  OBJC_TQ_Bycopy = 0x8,
  OBJC_TQ_Byref = 0x10,
  OBJC_TQ_Oneway = 0x20,

  /// The nullability qualifier is set when the nullability of the
  /// result or parameter was expressed via a context-sensitive
  /// keyword.
  OBJC_TQ_CSNullability = 0x40
};

/// The kind of ownership a declaration has, for visibility purposes.
/// This enumeration is designed such that higher values represent higher
/// levels of name hiding.
enum class ModuleOwnershipKind : unsigned {
  /// This declaration is not owned by a module.
  Unowned,

  /// This declaration has an owning module, but is globally visible
  /// (typically because its owning module is visible and we know that
  /// modules cannot later become hidden in this compilation).
  /// After serialization and deserialization, this will be converted
  /// to VisibleWhenImported.
  Visible,

  /// This declaration has an owning module, and is visible when that
  /// module is imported.
  VisibleWhenImported,

  /// This declaration has an owning module, but is only visible to
  /// lookups that occur within that module.
  ModulePrivate
};

239protected:
/// The next declaration within the same lexical
/// DeclContext. These pointers form the linked list that is
/// traversed via DeclContext's decls_begin()/decls_end().
///
/// The extra two bits are used for the ModuleOwnershipKind.
llvm::PointerIntPair<Decl *, 2, ModuleOwnershipKind> NextInContextAndBits;

247private:
friend class DeclContext;

struct MultipleDC {
  DeclContext *SemanticDC;
  DeclContext *LexicalDC;
};

/// DeclCtx - Holds either a DeclContext* or a MultipleDC*.
/// For declarations that don't contain C++ scope specifiers, it contains
/// the DeclContext where the Decl was declared.
/// For declarations with C++ scope specifiers, it contains a MultipleDC*
/// with the context where it semantically belongs (SemanticDC) and the
/// context where it was lexically declared (LexicalDC).
/// e.g.:
///
///   namespace A {
///      void f(); // SemanticDC == LexicalDC == 'namespace A'
///   }
///   void A::f(); // SemanticDC == namespace 'A'
///                // LexicalDC == global namespace
llvm::PointerUnion<DeclContext*, MultipleDC*> DeclCtx;

bool isInSemaDC() const { return DeclCtx.is<DeclContext*>(); }
bool isOutOfSemaDC() const { return DeclCtx.is<MultipleDC*>(); }

MultipleDC *getMultipleDC() const {
  return DeclCtx.get<MultipleDC*>();
}

DeclContext *getSemanticDC() const {
  return DeclCtx.get<DeclContext*>();
}

/// Loc - The location of this decl.
SourceLocation Loc;

/// DeclKind - This indicates which class this is.
unsigned DeclKind : 7;

/// InvalidDecl - This indicates a semantic error occurred.
unsigned InvalidDecl :  1;

/// HasAttrs - This indicates whether the decl has attributes or not.
unsigned HasAttrs : 1;

/// Implicit - Whether this declaration was implicitly generated by
/// the implementation rather than explicitly written by the user.
unsigned Implicit : 1;

/// Whether this declaration was "used", meaning that a definition is
/// required.
unsigned Used : 1;

/// Whether this declaration was "referenced".
/// The difference with 'Used' is whether the reference appears in a
/// evaluated context or not, e.g. functions used in uninstantiated templates
/// are regarded as "referenced" but not "used".
unsigned Referenced : 1;

/// Whether this declaration is a top-level declaration (function,
/// global variable, etc.) that is lexically inside an objc container
/// definition.
unsigned TopLevelDeclInObjCContainer : 1;

/// Whether statistic collection is enabled.
static bool StatisticsEnabled;

315protected:
friend class ASTDeclReader;
friend class ASTDeclWriter;
friend class ASTNodeImporter;
friend class ASTReader;
friend class CXXClassMemberWrapper;
friend class LinkageComputer;
template<typename decl_type> friend class Redeclarable;

/// Access - Used by C++ decls for the access specifier.
// NOTE: VC++ treats enums as signed, avoid using the AccessSpecifier enum
unsigned Access : 2;

/// Whether this declaration was loaded from an AST file.
unsigned FromASTFile : 1;

/// IdentifierNamespace - This specifies what IDNS_* namespace this lives in.
unsigned IdentifierNamespace : 14;

/// If 0, we have not computed the linkage of this declaration.
/// Otherwise, it is the linkage + 1.
mutable unsigned CacheValidAndLinkage : 3;

/// Allocate memory for a deserialized declaration.
///
/// This routine must be used to allocate memory for any declaration that is
/// deserialized from a module file.
///
/// \param Size The size of the allocated object.
/// \param Ctx The context in which we will allocate memory.
/// \param ID The global ID of the deserialized declaration.
/// \param Extra The amount of extra space to allocate after the object.
void *operator new(std::size_t Size, const ASTContext &Ctx, unsigned ID,
                   std::size_t Extra = 0);

/// Allocate memory for a non-deserialized declaration.
void *operator new(std::size_t Size, const ASTContext &Ctx,
                   DeclContext *Parent, std::size_t Extra = 0);

354private:
bool AccessDeclContextSanity() const;

/// Get the module ownership kind to use for a local lexical child of \p DC,
/// which may be either a local or (rarely) an imported declaration.
static ModuleOwnershipKind getModuleOwnershipKindForChildOf(DeclContext *DC) {
  if (DC) {
    auto *D = cast<Decl>(DC);
    auto MOK = D->getModuleOwnershipKind();
    if (MOK != ModuleOwnershipKind::Unowned &&
        (!D->isFromASTFile() || D->hasLocalOwningModuleStorage()))
      return MOK;
    // If D is not local and we have no local module storage, then we don't
    // need to track module ownership at all.
  }
  return ModuleOwnershipKind::Unowned;
}

372public:
Decl() = delete;
Decl(const Decl&) = delete;
Decl(Decl &&) = delete;
Decl &operator=(const Decl&) = delete;
Decl &operator=(Decl&&) = delete;

379protected:
Decl(Kind DK, DeclContext *DC, SourceLocation L)
    : NextInContextAndBits(nullptr, getModuleOwnershipKindForChildOf(DC)),
      DeclCtx(DC), Loc(L), DeclKind(DK), InvalidDecl(false), HasAttrs(false),
      Implicit(false), Used(false), Referenced(false),
      TopLevelDeclInObjCContainer(false), Access(AS_none), FromASTFile(0),
      IdentifierNamespace(getIdentifierNamespaceForKind(DK)),
      CacheValidAndLinkage(0) {
  if (StatisticsEnabled) add(DK);
}

Decl(Kind DK, EmptyShell Empty)
    : DeclKind(DK), InvalidDecl(false), HasAttrs(false), Implicit(false),
      Used(false), Referenced(false), TopLevelDeclInObjCContainer(false),
      Access(AS_none), FromASTFile(0),
      IdentifierNamespace(getIdentifierNamespaceForKind(DK)),
      CacheValidAndLinkage(0) {
  if (StatisticsEnabled) add(DK);
}

virtual ~Decl();

/// Update a potentially out-of-date declaration.
void updateOutOfDate(IdentifierInfo &II) const;

Linkage getCachedLinkage() const {
  return Linkage(CacheValidAndLinkage - 1);
}

void setCachedLinkage(Linkage L) const {
  CacheValidAndLinkage = L + 1;
}

bool hasCachedLinkage() const {
  return CacheValidAndLinkage;
}

416public:
/// Source range that this declaration covers.
virtual SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) {
  return SourceRange(getLocation(), getLocation());
}

SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) {
  return getSourceRange().getBegin();
}

SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) {
  return getSourceRange().getEnd();
}

SourceLocation getLocation() const { return Loc; }
void setLocation(SourceLocation L) { Loc = L; }

Kind getKind() const { return static_cast<Kind>(DeclKind); }
const char *getDeclKindName() const;

Decl *getNextDeclInContext() { return NextInContextAndBits.getPointer(); }
const Decl *getNextDeclInContext() const {return NextInContextAndBits.getPointer();}

DeclContext *getDeclContext() {
  if (isInSemaDC())
    return getSemanticDC();
  return getMultipleDC()->SemanticDC;
}
const DeclContext *getDeclContext() const {
  return const_cast<Decl*>(this)->getDeclContext();
}

/// Find the innermost non-closure ancestor of this declaration,
/// walking up through blocks, lambdas, etc.  If that ancestor is
/// not a code context (!isFunctionOrMethod()), returns null.
///
/// A declaration may be its own non-closure context.
Decl *getNonClosureContext();
const Decl *getNonClosureContext() const {
  return const_cast<Decl*>(this)->getNonClosureContext();
}

TranslationUnitDecl *getTranslationUnitDecl();
const TranslationUnitDecl *getTranslationUnitDecl() const {
  return const_cast<Decl*>(this)->getTranslationUnitDecl();
}

bool isInAnonymousNamespace() const;

bool isInStdNamespace() const;

ASTContext &getASTContext() const LLVM_READONLY__attribute__((__pure__));

/// Helper to get the language options from the ASTContext.
/// Defined out of line to avoid depending on ASTContext.h.
const LangOptions &getLangOpts() const LLVM_READONLY__attribute__((__pure__));

void setAccess(AccessSpecifier AS) {
  Access = AS;
  assert(AccessDeclContextSanity())((void)0);
}

AccessSpecifier getAccess() const {
  assert(AccessDeclContextSanity())((void)0);
  return AccessSpecifier(Access);
}

/// Retrieve the access specifier for this declaration, even though
/// it may not yet have been properly set.
AccessSpecifier getAccessUnsafe() const {
  return AccessSpecifier(Access);
}

bool hasAttrs() const { return HasAttrs; }

void setAttrs(const AttrVec& Attrs) {
  return setAttrsImpl(Attrs, getASTContext());
}

AttrVec &getAttrs() {
  return const_cast<AttrVec&>(const_cast<const Decl*>(this)->getAttrs());
}

const AttrVec &getAttrs() const;
void dropAttrs();
void addAttr(Attr *A);

using attr_iterator = AttrVec::const_iterator;
using attr_range = llvm::iterator_range<attr_iterator>;

attr_range attrs() const {
  return attr_range(attr_begin(), attr_end());
}

attr_iterator attr_begin() const {
  return hasAttrs() ? getAttrs().begin() : nullptr;
}
attr_iterator attr_end() const {
  return hasAttrs() ? getAttrs().end() : nullptr;
}

template <typename T>
void dropAttr() {
  if (!HasAttrs) return;

  AttrVec &Vec = getAttrs();
  llvm::erase_if(Vec, [](Attr *A) { return isa<T>(A); });

  if (Vec.empty())
    HasAttrs = false;
}

template <typename T>
llvm::iterator_range<specific_attr_iterator<T>> specific_attrs() const {
  return llvm::make_range(specific_attr_begin<T>(), specific_attr_end<T>());
}

template <typename T>
specific_attr_iterator<T> specific_attr_begin() const {
  return specific_attr_iterator<T>(attr_begin());
}

template <typename T>
specific_attr_iterator<T> specific_attr_end() const {
  return specific_attr_iterator<T>(attr_end());
}

template<typename T> T *getAttr() const {
  return hasAttrs() ? getSpecificAttr<T>(getAttrs()) : nullptr;
}

template<typename T> bool hasAttr() const {
  return hasAttrs() && hasSpecificAttr<T>(getAttrs());
}

/// getMaxAlignment - return the maximum alignment specified by attributes
/// on this decl, 0 if there are none.
unsigned getMaxAlignment() const;

/// setInvalidDecl - Indicates the Decl had a semantic error. This
/// allows for graceful error recovery.
void setInvalidDecl(bool Invalid = true);
bool isInvalidDecl() const { return (bool) InvalidDecl; }

/// isImplicit - Indicates whether the declaration was implicitly
/// generated by the implementation. If false, this declaration
/// was written explicitly in the source code.
bool isImplicit() const { return Implicit; }
void setImplicit(bool I = true) { Implicit = I; }

/// Whether *any* (re-)declaration of the entity was used, meaning that
/// a definition is required.
///
/// \param CheckUsedAttr When true, also consider the "used" attribute
/// (in addition to the "used" bit set by \c setUsed()) when determining
/// whether the function is used.
bool isUsed(bool CheckUsedAttr = true) const;

/// Set whether the declaration is used, in the sense of odr-use.
///
/// This should only be used immediately after creating a declaration.
/// It intentionally doesn't notify any listeners.
void setIsUsed() { getCanonicalDecl()->Used = true; }

/// Mark the declaration used, in the sense of odr-use.
///
/// This notifies any mutation listeners in addition to setting a bit
/// indicating the declaration is used.
void markUsed(ASTContext &C);

/// Whether any declaration of this entity was referenced.
bool isReferenced() const;

/// Whether this declaration was referenced. This should not be relied
/// upon for anything other than debugging.
bool isThisDeclarationReferenced() const { return Referenced; }

void setReferenced(bool R = true) { Referenced = R; }

/// Whether this declaration is a top-level declaration (function,
/// global variable, etc.) that is lexically inside an objc container
/// definition.
bool isTopLevelDeclInObjCContainer() const {
  return TopLevelDeclInObjCContainer;
}

void setTopLevelDeclInObjCContainer(bool V = true) {
  TopLevelDeclInObjCContainer = V;
}

/// Looks on this and related declarations for an applicable
/// external source symbol attribute.
ExternalSourceSymbolAttr *getExternalSourceSymbolAttr() const;

/// Whether this declaration was marked as being private to the
/// module in which it was defined.
bool isModulePrivate() const {
  return getModuleOwnershipKind() == ModuleOwnershipKind::ModulePrivate;
}

/// Return true if this declaration has an attribute which acts as
/// definition of the entity, such as 'alias' or 'ifunc'.
bool hasDefiningAttr() const;

/// Return this declaration's defining attribute if it has one.
const Attr *getDefiningAttr() const;

623protected:
/// Specify that this declaration was marked as being private
/// to the module in which it was defined.
void setModulePrivate() {
  // The module-private specifier has no effect on unowned declarations.
  // FIXME: We should track this in some way for source fidelity.
  if (getModuleOwnershipKind() == ModuleOwnershipKind::Unowned)
    return;
  setModuleOwnershipKind(ModuleOwnershipKind::ModulePrivate);
}

634public:
/// Set the FromASTFile flag. This indicates that this declaration
/// was deserialized and not parsed from source code and enables
/// features such as module ownership information.
void setFromASTFile() {
  FromASTFile = true;
}

/// Set the owning module ID.  This may only be called for
/// deserialized Decls.
void setOwningModuleID(unsigned ID) {
  assert(isFromASTFile() && "Only works on a deserialized declaration")((void)0);
  *((unsigned*)this - 2) = ID;
}

649public:
/// Determine the availability of the given declaration.
///
/// This routine will determine the most restrictive availability of
/// the given declaration (e.g., preferring 'unavailable' to
/// 'deprecated').
///
/// \param Message If non-NULL and the result is not \c
/// AR_Available, will be set to a (possibly empty) message
/// describing why the declaration has not been introduced, is
/// deprecated, or is unavailable.
///
/// \param EnclosingVersion The version to compare with. If empty, assume the
/// deployment target version.
///
/// \param RealizedPlatform If non-NULL and the availability result is found
/// in an available attribute it will set to the platform which is written in
/// the available attribute.
AvailabilityResult
getAvailability(std::string *Message = nullptr,
                VersionTuple EnclosingVersion = VersionTuple(),
                StringRef *RealizedPlatform = nullptr) const;

/// Retrieve the version of the target platform in which this
/// declaration was introduced.
///
/// \returns An empty version tuple if this declaration has no 'introduced'
/// availability attributes, or the version tuple that's specified in the
/// attribute otherwise.
VersionTuple getVersionIntroduced() const;

/// Determine whether this declaration is marked 'deprecated'.
///
/// \param Message If non-NULL and the declaration is deprecated,
/// this will be set to the message describing why the declaration
/// was deprecated (which may be empty).
bool isDeprecated(std::string *Message = nullptr) const {
  return getAvailability(Message) == AR_Deprecated;
}

/// Determine whether this declaration is marked 'unavailable'.
///
/// \param Message If non-NULL and the declaration is unavailable,
/// this will be set to the message describing why the declaration
/// was made unavailable (which may be empty).
bool isUnavailable(std::string *Message = nullptr) const {
  return getAvailability(Message) == AR_Unavailable;
}

/// Determine whether this is a weak-imported symbol.
///
/// Weak-imported symbols are typically marked with the
/// 'weak_import' attribute, but may also be marked with an
/// 'availability' attribute where we're targing a platform prior to
/// the introduction of this feature.
bool isWeakImported() const;

/// Determines whether this symbol can be weak-imported,
/// e.g., whether it would be well-formed to add the weak_import
/// attribute.
///
/// \param IsDefinition Set to \c true to indicate that this
/// declaration cannot be weak-imported because it has a definition.
bool canBeWeakImported(bool &IsDefinition) const;

/// Determine whether this declaration came from an AST file (such as
/// a precompiled header or module) rather than having been parsed.
bool isFromASTFile() const { return FromASTFile; }

/// Retrieve the global declaration ID associated with this
/// declaration, which specifies where this Decl was loaded from.
unsigned getGlobalID() const {
  if (isFromASTFile())
    return *((const unsigned*)this - 1);
  return 0;
}

/// Retrieve the global ID of the module that owns this particular
/// declaration.
unsigned getOwningModuleID() const {
  if (isFromASTFile())
    return *((const unsigned*)this - 2);
  return 0;
}

734private:
Module *getOwningModuleSlow() const;

737protected:
bool hasLocalOwningModuleStorage() const;

740public:
/// Get the imported owning module, if this decl is from an imported
/// (non-local) module.
Module *getImportedOwningModule() const {
  if (!isFromASTFile() || !hasOwningModule())
    return nullptr;

  return getOwningModuleSlow();
}

/// Get the local owning module, if known. Returns nullptr if owner is
/// not yet known or declaration is not from a module.
Module *getLocalOwningModule() const {
  if (isFromASTFile() || !hasOwningModule())
    return nullptr;

  assert(hasLocalOwningModuleStorage() &&((void)0)
         "owned local decl but no local module storage")((void)0);
  return reinterpret_cast<Module *const *>(this)[-1];
}
void setLocalOwningModule(Module *M) {
  assert(!isFromASTFile() && hasOwningModule() &&((void)0)
         hasLocalOwningModuleStorage() &&((void)0)
         "should not have a cached owning module")((void)0);
  reinterpret_cast<Module **>(this)[-1] = M;
}

/// Is this declaration owned by some module?
bool hasOwningModule() const {
  return getModuleOwnershipKind() != ModuleOwnershipKind::Unowned;
}

/// Get the module that owns this declaration (for visibility purposes).
Module *getOwningModule() const {
  return isFromASTFile() ? getImportedOwningModule() : getLocalOwningModule();
}

/// Get the module that owns this declaration for linkage purposes.
/// There only ever is such a module under the C++ Modules TS.
///
/// \param IgnoreLinkage Ignore the linkage of the entity; assume that
/// all declarations in a global module fragment are unowned.
Module *getOwningModuleForLinkage(bool IgnoreLinkage = false) const;

/// Determine whether this declaration is definitely visible to name lookup,
/// independent of whether the owning module is visible.
/// Note: The declaration may be visible even if this returns \c false if the
/// owning module is visible within the query context. This is a low-level
/// helper function; most code should be calling Sema::isVisible() instead.
bool isUnconditionallyVisible() const {
  return (int)getModuleOwnershipKind() <= (int)ModuleOwnershipKind::Visible;
}

/// Set that this declaration is globally visible, even if it came from a
/// module that is not visible.
void setVisibleDespiteOwningModule() {
  if (!isUnconditionallyVisible())
    setModuleOwnershipKind(ModuleOwnershipKind::Visible);
}

/// Get the kind of module ownership for this declaration.
ModuleOwnershipKind getModuleOwnershipKind() const {
  return NextInContextAndBits.getInt();
}

/// Set whether this declaration is hidden from name lookup.
void setModuleOwnershipKind(ModuleOwnershipKind MOK) {
  assert(!(getModuleOwnershipKind() == ModuleOwnershipKind::Unowned &&((void)0)
           MOK != ModuleOwnershipKind::Unowned && !isFromASTFile() &&((void)0)
           !hasLocalOwningModuleStorage()) &&((void)0)
         "no storage available for owning module for this declaration")((void)0);
  NextInContextAndBits.setInt(MOK);
}

unsigned getIdentifierNamespace() const {
  return IdentifierNamespace;
}

bool isInIdentifierNamespace(unsigned NS) const {
  return getIdentifierNamespace() & NS;
}

static unsigned getIdentifierNamespaceForKind(Kind DK);

bool hasTagIdentifierNamespace() const {
  return isTagIdentifierNamespace(getIdentifierNamespace());
}

static bool isTagIdentifierNamespace(unsigned NS) {
  // TagDecls have Tag and Type set and may also have TagFriend.
  return (NS & ~IDNS_TagFriend) == (IDNS_Tag | IDNS_Type);
}

/// getLexicalDeclContext - The declaration context where this Decl was
/// lexically declared (LexicalDC). May be different from
/// getDeclContext() (SemanticDC).
/// e.g.:
///
///   namespace A {
///      void f(); // SemanticDC == LexicalDC == 'namespace A'
///   }
///   void A::f(); // SemanticDC == namespace 'A'
///                // LexicalDC == global namespace
DeclContext *getLexicalDeclContext() {
  if (isInSemaDC())
    return getSemanticDC();
  return getMultipleDC()->LexicalDC;
}
const DeclContext *getLexicalDeclContext() const {
  return const_cast<Decl*>(this)->getLexicalDeclContext();
}

/// Determine whether this declaration is declared out of line (outside its
/// semantic context).
virtual bool isOutOfLine() const;

/// setDeclContext - Set both the semantic and lexical DeclContext
/// to DC.
void setDeclContext(DeclContext *DC);

void setLexicalDeclContext(DeclContext *DC);

/// Determine whether this declaration is a templated entity (whether it is
// within the scope of a template parameter).
bool isTemplated() const;

/// Determine the number of levels of template parameter surrounding this
/// declaration.
unsigned getTemplateDepth() const;

/// isDefinedOutsideFunctionOrMethod - This predicate returns true if this
/// scoped decl is defined outside the current function or method.  This is
/// roughly global variables and functions, but also handles enums (which
/// could be defined inside or outside a function etc).
bool isDefinedOutsideFunctionOrMethod() const {
  return getParentFunctionOrMethod() == nullptr;
}

/// Determine whether a substitution into this declaration would occur as
/// part of a substitution into a dependent local scope. Such a substitution
/// transitively substitutes into all constructs nested within this
/// declaration.
///
/// This recognizes non-defining declarations as well as members of local
/// classes and lambdas:
/// \code
///     template<typename T> void foo() { void bar(); }
///     template<typename T> void foo2() { class ABC { void bar(); }; }
///     template<typename T> inline int x = [](){ return 0; }();
/// \endcode
bool isInLocalScopeForInstantiation() const;

/// If this decl is defined inside a function/method/block it returns
/// the corresponding DeclContext, otherwise it returns null.
const DeclContext *getParentFunctionOrMethod() const;
DeclContext *getParentFunctionOrMethod() {
  return const_cast<DeclContext*>(
                  const_cast<const Decl*>(this)->getParentFunctionOrMethod());
}

/// Retrieves the "canonical" declaration of the given declaration.
virtual Decl *getCanonicalDecl() { return this; }
const Decl *getCanonicalDecl() const {
  return const_cast<Decl*>(this)->getCanonicalDecl();
}

/// Whether this particular Decl is a canonical one.
bool isCanonicalDecl() const { return getCanonicalDecl() == this; }

909protected:
/// Returns the next redeclaration or itself if this is the only decl.
///
/// Decl subclasses that can be redeclared should override this method so that
/// Decl::redecl_iterator can iterate over them.
virtual Decl *getNextRedeclarationImpl() { return this; }

/// Implementation of getPreviousDecl(), to be overridden by any
/// subclass that has a redeclaration chain.
virtual Decl *getPreviousDeclImpl() { return nullptr; }

/// Implementation of getMostRecentDecl(), to be overridden by any
/// subclass that has a redeclaration chain.
virtual Decl *getMostRecentDeclImpl() { return this; }

924public:
/// Iterates through all the redeclarations of the same decl.
class redecl_iterator {
  /// Current - The current declaration.
  Decl *Current = nullptr;
  Decl *Starter;

public:
  using value_type = Decl *;
  using reference = const value_type &;
  using pointer = const value_type *;
  using iterator_category = std::forward_iterator_tag;
  using difference_type = std::ptrdiff_t;

  redecl_iterator() = default;
  explicit redecl_iterator(Decl *C) : Current(C), Starter(C) {}

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

  redecl_iterator& operator++() {
    assert(Current && "Advancing while iterator has reached end")((void)0);
    // Get either previous decl or latest decl.
    Decl *Next = Current->getNextRedeclarationImpl();
    assert(Next && "Should return next redeclaration or itself, never null!")((void)0);
    Current = (Next != Starter) ? Next : nullptr;
    return *this;
  }

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

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

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

using redecl_range = llvm::iterator_range<redecl_iterator>;

/// Returns an iterator range for all the redeclarations of the same
/// decl. It will iterate at least once (when this decl is the only one).
redecl_range redecls() const {
  return redecl_range(redecls_begin(), redecls_end());
}

redecl_iterator redecls_begin() const {
  return redecl_iterator(const_cast<Decl *>(this));
}

redecl_iterator redecls_end() const { return redecl_iterator(); }

/// Retrieve the previous declaration that declares the same entity
/// as this declaration, or NULL if there is no previous declaration.
Decl *getPreviousDecl() { return getPreviousDeclImpl(); }

/// Retrieve the previous declaration that declares the same entity
/// as this declaration, or NULL if there is no previous declaration.
const Decl *getPreviousDecl() const {
  return const_cast<Decl *>(this)->getPreviousDeclImpl();
}

/// True if this is the first declaration in its redeclaration chain.
bool isFirstDecl() const {
  return getPreviousDecl() == nullptr;
}

/// Retrieve the most recent declaration that declares the same entity
/// as this declaration (which may be this declaration).
Decl *getMostRecentDecl() { return getMostRecentDeclImpl(); }

/// Retrieve the most recent declaration that declares the same entity
/// as this declaration (which may be this declaration).
const Decl *getMostRecentDecl() const {
  return const_cast<Decl *>(this)->getMostRecentDeclImpl();
}

/// getBody - If this Decl represents a declaration for a body of code,
///  such as a function or method definition, this method returns the
///  top-level Stmt* of that body.  Otherwise this method returns null.
virtual Stmt* getBody() const { return nullptr; }

/// Returns true if this \c Decl represents a declaration for a body of
/// code, such as a function or method definition.
/// Note that \c hasBody can also return true if any redeclaration of this
/// \c Decl represents a declaration for a body of code.
virtual bool hasBody() const { return getBody() != nullptr; }

/// getBodyRBrace - Gets the right brace of the body, if a body exists.
/// This works whether the body is a CompoundStmt or a CXXTryStmt.
SourceLocation getBodyRBrace() const;

// global temp stats (until we have a per-module visitor)
static void add(Kind k);
static void EnableStatistics();
static void PrintStats();

/// isTemplateParameter - Determines whether this declaration is a
/// template parameter.
bool isTemplateParameter() const;

/// isTemplateParameter - Determines whether this declaration is a
/// template parameter pack.
bool isTemplateParameterPack() const;

/// Whether this declaration is a parameter pack.
bool isParameterPack() const;

/// returns true if this declaration is a template
bool isTemplateDecl() const;

/// Whether this declaration is a function or function template.
bool isFunctionOrFunctionTemplate() const {
  return (DeclKind >= Decl::firstFunction &&
          DeclKind <= Decl::lastFunction) ||
         DeclKind == FunctionTemplate;
}

/// If this is a declaration that describes some template, this
/// method returns that template declaration.
///
/// Note that this returns nullptr for partial specializations, because they
/// are not modeled as TemplateDecls. Use getDescribedTemplateParams to handle
/// those cases.
TemplateDecl *getDescribedTemplate() const;

/// If this is a declaration that describes some template or partial
/// specialization, this returns the corresponding template parameter list.
const TemplateParameterList *getDescribedTemplateParams() const;

/// Returns the function itself, or the templated function if this is a
/// function template.
FunctionDecl *getAsFunction() LLVM_READONLY__attribute__((__pure__));

const FunctionDecl *getAsFunction() const {
  return const_cast<Decl *>(this)->getAsFunction();
}

/// Changes the namespace of this declaration to reflect that it's
/// a function-local extern declaration.
///
/// These declarations appear in the lexical context of the extern
/// declaration, but in the semantic context of the enclosing namespace
/// scope.
void setLocalExternDecl() {
  Decl *Prev = getPreviousDecl();
  IdentifierNamespace &= ~IDNS_Ordinary;

  // It's OK for the declaration to still have the "invisible friend" flag or
  // the "conflicts with tag declarations in this scope" flag for the outer
  // scope.
  assert((IdentifierNamespace & ~(IDNS_OrdinaryFriend | IDNS_Tag)) == 0 &&((void)0)
         "namespace is not ordinary")((void)0);

  IdentifierNamespace |= IDNS_LocalExtern;
  if (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary)
    IdentifierNamespace |= IDNS_Ordinary;
}

/// Determine whether this is a block-scope declaration with linkage.
/// This will either be a local variable declaration declared 'extern', or a
/// local function declaration.
bool isLocalExternDecl() {
  return IdentifierNamespace & IDNS_LocalExtern;
}

/// Changes the namespace of this declaration to reflect that it's
/// the object of a friend declaration.
///
/// These declarations appear in the lexical context of the friending
/// class, but in the semantic context of the actual entity.  This property
/// applies only to a specific decl object;  other redeclarations of the
/// same entity may not (and probably don't) share this property.
void setObjectOfFriendDecl(bool PerformFriendInjection = false) {
  unsigned OldNS = IdentifierNamespace;
  assert((OldNS & (IDNS_Tag | IDNS_Ordinary |((void)0)
                   IDNS_TagFriend | IDNS_OrdinaryFriend |((void)0)
                   IDNS_LocalExtern | IDNS_NonMemberOperator)) &&((void)0)
         "namespace includes neither ordinary nor tag")((void)0);
  assert(!(OldNS & ~(IDNS_Tag | IDNS_Ordinary | IDNS_Type |((void)0)
                     IDNS_TagFriend | IDNS_OrdinaryFriend |((void)0)
                     IDNS_LocalExtern | IDNS_NonMemberOperator)) &&((void)0)
         "namespace includes other than ordinary or tag")((void)0);

  Decl *Prev = getPreviousDecl();
  IdentifierNamespace &= ~(IDNS_Ordinary | IDNS_Tag | IDNS_Type);

  if (OldNS & (IDNS_Tag | IDNS_TagFriend)) {
    IdentifierNamespace |= IDNS_TagFriend;
    if (PerformFriendInjection ||
        (Prev && Prev->getIdentifierNamespace() & IDNS_Tag))
      IdentifierNamespace |= IDNS_Tag | IDNS_Type;
  }

  if (OldNS & (IDNS_Ordinary | IDNS_OrdinaryFriend |
               IDNS_LocalExtern | IDNS_NonMemberOperator)) {
    IdentifierNamespace |= IDNS_OrdinaryFriend;
    if (PerformFriendInjection ||
        (Prev && Prev->getIdentifierNamespace() & IDNS_Ordinary))
      IdentifierNamespace |= IDNS_Ordinary;
  }
}

enum FriendObjectKind {
  FOK_None,      ///< Not a friend object.
  FOK_Declared,  ///< A friend of a previously-declared entity.
  FOK_Undeclared ///< A friend of a previously-undeclared entity.
};

/// Determines whether this declaration is the object of a
/// friend declaration and, if so, what kind.
///
/// There is currently no direct way to find the associated FriendDecl.
FriendObjectKind getFriendObjectKind() const {
  unsigned mask =
      (IdentifierNamespace & (IDNS_TagFriend | IDNS_OrdinaryFriend));
  if (!mask) return FOK_None;
  return (IdentifierNamespace & (IDNS_Tag | IDNS_Ordinary) ? FOK_Declared
                                                           : FOK_Undeclared);
}

/// Specifies that this declaration is a C++ overloaded non-member.
void setNonMemberOperator() {
  assert(getKind() == Function || getKind() == FunctionTemplate)((void)0);
  assert((IdentifierNamespace & IDNS_Ordinary) &&((void)0)
         "visible non-member operators should be in ordinary namespace")((void)0);
  IdentifierNamespace |= IDNS_NonMemberOperator;
}

static bool classofKind(Kind K) { return true; }
static DeclContext *castToDeclContext(const Decl *);
static Decl *castFromDeclContext(const DeclContext *);

void print(raw_ostream &Out, unsigned Indentation = 0,
           bool PrintInstantiation = false) const;
void print(raw_ostream &Out, const PrintingPolicy &Policy,
           unsigned Indentation = 0, bool PrintInstantiation = false) const;
static void printGroup(Decl** Begin, unsigned NumDecls,
                       raw_ostream &Out, const PrintingPolicy &Policy,
                       unsigned Indentation = 0);

// Debuggers don't usually respect default arguments.
void dump() const;

// Same as dump(), but forces color printing.
void dumpColor() const;

void dump(raw_ostream &Out, bool Deserialize = false,
          ASTDumpOutputFormat OutputFormat = ADOF_Default) const;

/// \return Unique reproducible object identifier
int64_t getID() const;

/// Looks through the Decl's underlying type to extract a FunctionType
/// when possible. Will return null if the type underlying the Decl does not
/// have a FunctionType.
const FunctionType *getFunctionType(bool BlocksToo = true) const;

1188private:
void setAttrsImpl(const AttrVec& Attrs, ASTContext &Ctx);
void setDeclContextsImpl(DeclContext *SemaDC, DeclContext *LexicalDC,
                         ASTContext &Ctx);

1193protected:
ASTMutationListener *getASTMutationListener() const;
1195};

1197/// Determine whether two declarations declare the same entity.
1198inline bool declaresSameEntity(const Decl *D1, const Decl *D2) {
if (!D1 || !D2)
  return false;

if (D1 == D2)
  return true;

return D1->getCanonicalDecl() == D2->getCanonicalDecl();
1206}

1208/// PrettyStackTraceDecl - If a crash occurs, indicate that it happened when
1209/// doing something to a specific decl.
1210class PrettyStackTraceDecl : public llvm::PrettyStackTraceEntry {
const Decl *TheDecl;
SourceLocation Loc;
SourceManager &SM;
const char *Message;

1216public:
PrettyStackTraceDecl(const Decl *theDecl, SourceLocation L,
                     SourceManager &sm, const char *Msg)
    : TheDecl(theDecl), Loc(L), SM(sm), Message(Msg) {}

void print(raw_ostream &OS) const override;
1222};
1223} // namespace clang

1225// Required to determine the layout of the PointerUnion<NamedDecl*> before
1226// seeing the NamedDecl definition being first used in DeclListNode::operator*.
1227namespace llvm {
template <> struct PointerLikeTypeTraits<::clang::NamedDecl *> {
  static inline void *getAsVoidPointer(::clang::NamedDecl *P) { return P; }
  static inline ::clang::NamedDecl *getFromVoidPointer(void *P) {
    return static_cast<::clang::NamedDecl *>(P);
  }
  static constexpr int NumLowBitsAvailable = 3;
};
1235}

1237namespace clang {
1238/// A list storing NamedDecls in the lookup tables.
1239class DeclListNode {
friend class ASTContext; // allocate, deallocate nodes.
friend class StoredDeclsList;
1242public:
using Decls = llvm::PointerUnion<NamedDecl*, DeclListNode*>;
class iterator {
  friend class DeclContextLookupResult;
  friend class StoredDeclsList;

  Decls Ptr;
  iterator(Decls Node) : Ptr(Node) { }
public:
  using difference_type = ptrdiff_t;
  using value_type = NamedDecl*;
  using pointer = void;
  using reference = value_type;
  using iterator_category = std::forward_iterator_tag;

  iterator() = default;

  reference operator*() const {
    assert(Ptr && "dereferencing end() iterator")((void)0);
    if (DeclListNode *CurNode = Ptr.dyn_cast<DeclListNode*>())
      return CurNode->D;
    return Ptr.get<NamedDecl*>();
  }
  void operator->() const { } // Unsupported.
  bool operator==(const iterator &X) const { return Ptr == X.Ptr; }
  bool operator!=(const iterator &X) const { return Ptr != X.Ptr; }
  inline iterator &operator++() { // ++It
    assert(!Ptr.isNull() && "Advancing empty iterator")((void)0);

    if (DeclListNode *CurNode = Ptr.dyn_cast<DeclListNode*>())
      Ptr = CurNode->Rest;
    else
      Ptr = nullptr;
    return *this;
  }
  iterator operator++(int) { // It++
    iterator temp = *this;
    ++(*this);
    return temp;
  }
  // Enables the pattern for (iterator I =..., E = I.end(); I != E; ++I)
  iterator end() { return iterator(); }
};
1285private:
NamedDecl *D = nullptr;
Decls Rest = nullptr;
DeclListNode(NamedDecl *ND) : D(ND) {}
1289};

1291/// The results of name lookup within a DeclContext.
1292class DeclContextLookupResult {
using Decls = DeclListNode::Decls;

/// When in collection form, this is what the Data pointer points to.
Decls Result;

1298public:
DeclContextLookupResult() = default;
DeclContextLookupResult(Decls Result) : Result(Result) {}

using iterator = DeclListNode::iterator;
using const_iterator = iterator;
using reference = iterator::reference;

iterator begin() { return iterator(Result); }
iterator end() { return iterator(); }
const_iterator begin() const {
  return const_cast<DeclContextLookupResult*>(this)->begin();
}
const_iterator end() const { return iterator(); }

bool empty() const { return Result.isNull();  }
bool isSingleResult() const { return Result.dyn_cast<NamedDecl*>(); }
reference front() const { return *begin(); }

// Find the first declaration of the given type in the list. Note that this
// is not in general the earliest-declared declaration, and should only be
// used when it's not possible for there to be more than one match or where
// it doesn't matter which one is found.
template<class T> T *find_first() const {
  for (auto *D : *this)
    if (T *Decl = dyn_cast<T>(D))
      return Decl;

  return nullptr;
}
1328};

1330/// DeclContext - This is used only as base class of specific decl types that
1331/// can act as declaration contexts. These decls are (only the top classes
1332/// that directly derive from DeclContext are mentioned, not their subclasses):
1333///
1334///   TranslationUnitDecl
1335///   ExternCContext
1336///   NamespaceDecl
1337///   TagDecl
1338///   OMPDeclareReductionDecl
1339///   OMPDeclareMapperDecl
1340///   FunctionDecl
1341///   ObjCMethodDecl
1342///   ObjCContainerDecl
1343///   LinkageSpecDecl
1344///   ExportDecl
1345///   BlockDecl
1346///   CapturedDecl
1347class DeclContext {
/// For makeDeclVisibleInContextImpl
friend class ASTDeclReader;
/// For reconcileExternalVisibleStorage, CreateStoredDeclsMap,
/// hasNeedToReconcileExternalVisibleStorage
friend class ExternalASTSource;
/// For CreateStoredDeclsMap
friend class DependentDiagnostic;
/// For hasNeedToReconcileExternalVisibleStorage,
/// hasLazyLocalLexicalLookups, hasLazyExternalLexicalLookups
friend class ASTWriter;

// We use uint64_t in the bit-fields below since some bit-fields
// cross the unsigned boundary and this breaks the packing.

/// Stores the bits used by DeclContext.
/// If modified NumDeclContextBit, the ctor of DeclContext and the accessor
/// methods in DeclContext should be updated appropriately.
class DeclContextBitfields {
  friend class DeclContext;
  /// DeclKind - This indicates which class this is.
  uint64_t DeclKind : 7;

  /// Whether this declaration context also has some external
  /// storage that contains additional declarations that are lexically
  /// part of this context.
  mutable uint64_t ExternalLexicalStorage : 1;

  /// Whether this declaration context also has some external
  /// storage that contains additional declarations that are visible
  /// in this context.
  mutable uint64_t ExternalVisibleStorage : 1;

  /// Whether this declaration context has had externally visible
  /// storage added since the last lookup. In this case, \c LookupPtr's
  /// invariant may not hold and needs to be fixed before we perform
  /// another lookup.
  mutable uint64_t NeedToReconcileExternalVisibleStorage : 1;

  /// If \c true, this context may have local lexical declarations
  /// that are missing from the lookup table.
  mutable uint64_t HasLazyLocalLexicalLookups : 1;

  /// If \c true, the external source may have lexical declarations
  /// that are missing from the lookup table.
  mutable uint64_t HasLazyExternalLexicalLookups : 1;

  /// If \c true, lookups should only return identifier from
  /// DeclContext scope (for example TranslationUnit). Used in
  /// LookupQualifiedName()
  mutable uint64_t UseQualifiedLookup : 1;
};

/// Number of bits in DeclContextBitfields.
enum { NumDeclContextBits = 13 };

/// Stores the bits used by TagDecl.
/// If modified NumTagDeclBits and the accessor
/// methods in TagDecl should be updated appropriately.
class TagDeclBitfields {
  friend class TagDecl;
  /// For the bits in DeclContextBitfields
  uint64_t : NumDeclContextBits;

  /// The TagKind enum.
  uint64_t TagDeclKind : 3;

  /// True if this is a definition ("struct foo {};"), false if it is a
  /// declaration ("struct foo;").  It is not considered a definition
  /// until the definition has been fully processed.
  uint64_t IsCompleteDefinition : 1;

  /// True if this is currently being defined.
  uint64_t IsBeingDefined : 1;

  /// True if this tag declaration is "embedded" (i.e., defined or declared
  /// for the very first time) in the syntax of a declarator.
  uint64_t IsEmbeddedInDeclarator : 1;

  /// True if this tag is free standing, e.g. "struct foo;".
  uint64_t IsFreeStanding : 1;

  /// Indicates whether it is possible for declarations of this kind
  /// to have an out-of-date definition.
  ///
  /// This option is only enabled when modules are enabled.
  uint64_t MayHaveOutOfDateDef : 1;

  /// Has the full definition of this type been required by a use somewhere in
  /// the TU.
  uint64_t IsCompleteDefinitionRequired : 1;
};

/// Number of non-inherited bits in TagDeclBitfields.
enum { NumTagDeclBits = 9 };

/// Stores the bits used by EnumDecl.
/// If modified NumEnumDeclBit and the accessor
/// methods in EnumDecl should be updated appropriately.
class EnumDeclBitfields {
  friend class EnumDecl;
  /// For the bits in DeclContextBitfields.
  uint64_t : NumDeclContextBits;
  /// For the bits in TagDeclBitfields.
  uint64_t : NumTagDeclBits;

  /// Width in bits required to store all the non-negative
  /// enumerators of this enum.
  uint64_t NumPositiveBits : 8;

  /// Width in bits required to store all the negative
  /// enumerators of this enum.
  uint64_t NumNegativeBits : 8;

  /// True if this tag declaration is a scoped enumeration. Only
  /// possible in C++11 mode.
  uint64_t IsScoped : 1;

  /// If this tag declaration is a scoped enum,
  /// then this is true if the scoped enum was declared using the class
  /// tag, false if it was declared with the struct tag. No meaning is
  /// associated if this tag declaration is not a scoped enum.
  uint64_t IsScopedUsingClassTag : 1;

  /// True if this is an enumeration with fixed underlying type. Only
  /// possible in C++11, Microsoft extensions, or Objective C mode.
  uint64_t IsFixed : 1;

  /// True if a valid hash is stored in ODRHash.
  uint64_t HasODRHash : 1;
};

/// Number of non-inherited bits in EnumDeclBitfields.
enum { NumEnumDeclBits = 20 };

/// Stores the bits used by RecordDecl.
/// If modified NumRecordDeclBits and the accessor
/// methods in RecordDecl should be updated appropriately.
class RecordDeclBitfields {
  friend class RecordDecl;
  /// For the bits in DeclContextBitfields.
  uint64_t : NumDeclContextBits;
  /// For the bits in TagDeclBitfields.
  uint64_t : NumTagDeclBits;

  /// This is true if this struct ends with a flexible
  /// array member (e.g. int X[]) or if this union contains a struct that does.
  /// If so, this cannot be contained in arrays or other structs as a member.
  uint64_t HasFlexibleArrayMember : 1;

  /// Whether this is the type of an anonymous struct or union.
  uint64_t AnonymousStructOrUnion : 1;

  /// This is true if this struct has at least one member
  /// containing an Objective-C object pointer type.
  uint64_t HasObjectMember : 1;

  /// This is true if struct has at least one member of
  /// 'volatile' type.
  uint64_t HasVolatileMember : 1;

  /// Whether the field declarations of this record have been loaded
  /// from external storage. To avoid unnecessary deserialization of
  /// methods/nested types we allow deserialization of just the fields
  /// when needed.
  mutable uint64_t LoadedFieldsFromExternalStorage : 1;

  /// Basic properties of non-trivial C structs.
  uint64_t NonTrivialToPrimitiveDefaultInitialize : 1;
  uint64_t NonTrivialToPrimitiveCopy : 1;
  uint64_t NonTrivialToPrimitiveDestroy : 1;

  /// The following bits indicate whether this is or contains a C union that
  /// is non-trivial to default-initialize, destruct, or copy. These bits
  /// imply the associated basic non-triviality predicates declared above.
  uint64_t HasNonTrivialToPrimitiveDefaultInitializeCUnion : 1;
  uint64_t HasNonTrivialToPrimitiveDestructCUnion : 1;
  uint64_t HasNonTrivialToPrimitiveCopyCUnion : 1;

  /// Indicates whether this struct is destroyed in the callee.
  uint64_t ParamDestroyedInCallee : 1;

  /// Represents the way this type is passed to a function.
  uint64_t ArgPassingRestrictions : 2;
};

/// Number of non-inherited bits in RecordDeclBitfields.
enum { NumRecordDeclBits = 14 };

/// Stores the bits used by OMPDeclareReductionDecl.
/// If modified NumOMPDeclareReductionDeclBits and the accessor
/// methods in OMPDeclareReductionDecl should be updated appropriately.
class OMPDeclareReductionDeclBitfields {
  friend class OMPDeclareReductionDecl;
  /// For the bits in DeclContextBitfields
  uint64_t : NumDeclContextBits;

  /// Kind of initializer,
  /// function call or omp_priv<init_expr> initializtion.
  uint64_t InitializerKind : 2;
};

/// Number of non-inherited bits in OMPDeclareReductionDeclBitfields.
enum { NumOMPDeclareReductionDeclBits = 2 };

/// Stores the bits used by FunctionDecl.
/// If modified NumFunctionDeclBits and the accessor
/// methods in FunctionDecl and CXXDeductionGuideDecl
/// (for IsCopyDeductionCandidate) should be updated appropriately.
class FunctionDeclBitfields {
  friend class FunctionDecl;
  /// For IsCopyDeductionCandidate
  friend class CXXDeductionGuideDecl;
  /// For the bits in DeclContextBitfields.
  uint64_t : NumDeclContextBits;

  uint64_t SClass : 3;
  uint64_t IsInline : 1;
  uint64_t IsInlineSpecified : 1;

  uint64_t IsVirtualAsWritten : 1;
  uint64_t IsPure : 1;
  uint64_t HasInheritedPrototype : 1;
  uint64_t HasWrittenPrototype : 1;
  uint64_t IsDeleted : 1;
  /// Used by CXXMethodDecl
  uint64_t IsTrivial : 1;

  /// This flag indicates whether this function is trivial for the purpose of
  /// calls. This is meaningful only when this function is a copy/move
  /// constructor or a destructor.
  uint64_t IsTrivialForCall : 1;

  uint64_t IsDefaulted : 1;
  uint64_t IsExplicitlyDefaulted : 1;
  uint64_t HasDefaultedFunctionInfo : 1;
  uint64_t HasImplicitReturnZero : 1;
  uint64_t IsLateTemplateParsed : 1;

  /// Kind of contexpr specifier as defined by ConstexprSpecKind.
  uint64_t ConstexprKind : 2;
  uint64_t InstantiationIsPending : 1;

  /// Indicates if the function uses __try.
  uint64_t UsesSEHTry : 1;

  /// Indicates if the function was a definition
  /// but its body was skipped.
  uint64_t HasSkippedBody : 1;

  /// Indicates if the function declaration will
  /// have a body, once we're done parsing it.
  uint64_t WillHaveBody : 1;

  /// Indicates that this function is a multiversioned
  /// function using attribute 'target'.
  uint64_t IsMultiVersion : 1;

  /// [C++17] Only used by CXXDeductionGuideDecl. Indicates that
  /// the Deduction Guide is the implicitly generated 'copy
  /// deduction candidate' (is used during overload resolution).
  uint64_t IsCopyDeductionCandidate : 1;

  /// Store the ODRHash after first calculation.
  uint64_t HasODRHash : 1;

  /// Indicates if the function uses Floating Point Constrained Intrinsics
  uint64_t UsesFPIntrin : 1;
};

/// Number of non-inherited bits in FunctionDeclBitfields.
enum { NumFunctionDeclBits = 27 };

/// Stores the bits used by CXXConstructorDecl. If modified
/// NumCXXConstructorDeclBits and the accessor
/// methods in CXXConstructorDecl should be updated appropriately.
class CXXConstructorDeclBitfields {
  friend class CXXConstructorDecl;
  /// For the bits in DeclContextBitfields.
  uint64_t : NumDeclContextBits;
  /// For the bits in FunctionDeclBitfields.
  uint64_t : NumFunctionDeclBits;

  /// 24 bits to fit in the remaining available space.
  /// Note that this makes CXXConstructorDeclBitfields take
  /// exactly 64 bits and thus the width of NumCtorInitializers
  /// will need to be shrunk if some bit is added to NumDeclContextBitfields,
  /// NumFunctionDeclBitfields or CXXConstructorDeclBitfields.
  uint64_t NumCtorInitializers : 21;
  uint64_t IsInheritingConstructor : 1;

  /// Whether this constructor has a trail-allocated explicit specifier.
  uint64_t HasTrailingExplicitSpecifier : 1;
  /// If this constructor does't have a trail-allocated explicit specifier.
  /// Whether this constructor is explicit specified.
  uint64_t IsSimpleExplicit : 1;
};

/// Number of non-inherited bits in CXXConstructorDeclBitfields.
enum {
  NumCXXConstructorDeclBits = 64 - NumDeclContextBits - NumFunctionDeclBits
};

/// Stores the bits used by ObjCMethodDecl.
/// If modified NumObjCMethodDeclBits and the accessor
/// methods in ObjCMethodDecl should be updated appropriately.
class ObjCMethodDeclBitfields {
  friend class ObjCMethodDecl;

  /// For the bits in DeclContextBitfields.
  uint64_t : NumDeclContextBits;

  /// The conventional meaning of this method; an ObjCMethodFamily.
  /// This is not serialized; instead, it is computed on demand and
  /// cached.
  mutable uint64_t Family : ObjCMethodFamilyBitWidth;

  /// instance (true) or class (false) method.
  uint64_t IsInstance : 1;
  uint64_t IsVariadic : 1;

  /// True if this method is the getter or setter for an explicit property.
  uint64_t IsPropertyAccessor : 1;

  /// True if this method is a synthesized property accessor stub.
  uint64_t IsSynthesizedAccessorStub : 1;

  /// Method has a definition.
  uint64_t IsDefined : 1;

  /// Method redeclaration in the same interface.
  uint64_t IsRedeclaration : 1;

  /// Is redeclared in the same interface.
  mutable uint64_t HasRedeclaration : 1;

  /// \@required/\@optional
  uint64_t DeclImplementation : 2;

  /// in, inout, etc.
  uint64_t objcDeclQualifier : 7;

  /// Indicates whether this method has a related result type.
  uint64_t RelatedResultType : 1;

  /// Whether the locations of the selector identifiers are in a
  /// "standard" position, a enum SelectorLocationsKind.
  uint64_t SelLocsKind : 2;

  /// Whether this method overrides any other in the class hierarchy.
  ///
  /// A method is said to override any method in the class's
  /// base classes, its protocols, or its categories' protocols, that has
  /// the same selector and is of the same kind (class or instance).
  /// A method in an implementation is not considered as overriding the same
  /// method in the interface or its categories.
  uint64_t IsOverriding : 1;

  /// Indicates if the method was a definition but its body was skipped.
  uint64_t HasSkippedBody : 1;
};

/// Number of non-inherited bits in ObjCMethodDeclBitfields.
enum { NumObjCMethodDeclBits = 24 };

/// Stores the bits used by ObjCContainerDecl.
/// If modified NumObjCContainerDeclBits and the accessor
/// methods in ObjCContainerDecl should be updated appropriately.
class ObjCContainerDeclBitfields {
  friend class ObjCContainerDecl;
  /// For the bits in DeclContextBitfields
  uint32_t : NumDeclContextBits;

  // Not a bitfield but this saves space.
  // Note that ObjCContainerDeclBitfields is full.
  SourceLocation AtStart;
};

/// Number of non-inherited bits in ObjCContainerDeclBitfields.
/// Note that here we rely on the fact that SourceLocation is 32 bits
/// wide. We check this with the static_assert in the ctor of DeclContext.
enum { NumObjCContainerDeclBits = 64 - NumDeclContextBits };

/// Stores the bits used by LinkageSpecDecl.
/// If modified NumLinkageSpecDeclBits and the accessor
/// methods in LinkageSpecDecl should be updated appropriately.
class LinkageSpecDeclBitfields {
  friend class LinkageSpecDecl;
  /// For the bits in DeclContextBitfields.
  uint64_t : NumDeclContextBits;

  /// The language for this linkage specification with values
  /// in the enum LinkageSpecDecl::LanguageIDs.
  uint64_t Language : 3;

  /// True if this linkage spec has braces.
  /// This is needed so that hasBraces() returns the correct result while the
  /// linkage spec body is being parsed.  Once RBraceLoc has been set this is
  /// not used, so it doesn't need to be serialized.
  uint64_t HasBraces : 1;
};

/// Number of non-inherited bits in LinkageSpecDeclBitfields.
enum { NumLinkageSpecDeclBits = 4 };

/// Stores the bits used by BlockDecl.
/// If modified NumBlockDeclBits and the accessor
/// methods in BlockDecl should be updated appropriately.
class BlockDeclBitfields {
  friend class BlockDecl;
  /// For the bits in DeclContextBitfields.
  uint64_t : NumDeclContextBits;

  uint64_t IsVariadic : 1;
  uint64_t CapturesCXXThis : 1;
  uint64_t BlockMissingReturnType : 1;
  uint64_t IsConversionFromLambda : 1;

  /// A bit that indicates this block is passed directly to a function as a
  /// non-escaping parameter.
  uint64_t DoesNotEscape : 1;

  /// A bit that indicates whether it's possible to avoid coying this block to
  /// the heap when it initializes or is assigned to a local variable with
  /// automatic storage.
  uint64_t CanAvoidCopyToHeap : 1;
};

/// Number of non-inherited bits in BlockDeclBitfields.
enum { NumBlockDeclBits = 5 };

/// Pointer to the data structure used to lookup declarations
/// within this context (or a DependentStoredDeclsMap if this is a
/// dependent context). We maintain the invariant that, if the map
/// contains an entry for a DeclarationName (and we haven't lazily
/// omitted anything), then it contains all relevant entries for that
/// name (modulo the hasExternalDecls() flag).
mutable StoredDeclsMap *LookupPtr = nullptr;

1786protected:
/// This anonymous union stores the bits belonging to DeclContext and classes
/// deriving from it. The goal is to use otherwise wasted
/// space in DeclContext to store data belonging to derived classes.
/// The space saved is especially significient when pointers are aligned
/// to 8 bytes. In this case due to alignment requirements we have a
/// little less than 8 bytes free in DeclContext which we can use.
/// We check that none of the classes in this union is larger than
/// 8 bytes with static_asserts in the ctor of DeclContext.
union {
  DeclContextBitfields DeclContextBits;
  TagDeclBitfields TagDeclBits;
  EnumDeclBitfields EnumDeclBits;
  RecordDeclBitfields RecordDeclBits;
  OMPDeclareReductionDeclBitfields OMPDeclareReductionDeclBits;
  FunctionDeclBitfields FunctionDeclBits;
  CXXConstructorDeclBitfields CXXConstructorDeclBits;
  ObjCMethodDeclBitfields ObjCMethodDeclBits;
  ObjCContainerDeclBitfields ObjCContainerDeclBits;
  LinkageSpecDeclBitfields LinkageSpecDeclBits;
  BlockDeclBitfields BlockDeclBits;

  static_assert(sizeof(DeclContextBitfields) <= 8,
                "DeclContextBitfields is larger than 8 bytes!");
  static_assert(sizeof(TagDeclBitfields) <= 8,
                "TagDeclBitfields is larger than 8 bytes!");
  static_assert(sizeof(EnumDeclBitfields) <= 8,
                "EnumDeclBitfields is larger than 8 bytes!");
  static_assert(sizeof(RecordDeclBitfields) <= 8,
                "RecordDeclBitfields is larger than 8 bytes!");
  static_assert(sizeof(OMPDeclareReductionDeclBitfields) <= 8,
                "OMPDeclareReductionDeclBitfields is larger than 8 bytes!");
  static_assert(sizeof(FunctionDeclBitfields) <= 8,
                "FunctionDeclBitfields is larger than 8 bytes!");
  static_assert(sizeof(CXXConstructorDeclBitfields) <= 8,
                "CXXConstructorDeclBitfields is larger than 8 bytes!");
  static_assert(sizeof(ObjCMethodDeclBitfields) <= 8,
                "ObjCMethodDeclBitfields is larger than 8 bytes!");
  static_assert(sizeof(ObjCContainerDeclBitfields) <= 8,
                "ObjCContainerDeclBitfields is larger than 8 bytes!");
  static_assert(sizeof(LinkageSpecDeclBitfields) <= 8,
                "LinkageSpecDeclBitfields is larger than 8 bytes!");
  static_assert(sizeof(BlockDeclBitfields) <= 8,
                "BlockDeclBitfields is larger than 8 bytes!");
};

/// FirstDecl - The first declaration stored within this declaration
/// context.
mutable Decl *FirstDecl = nullptr;

/// LastDecl - The last declaration stored within this declaration
/// context. FIXME: We could probably cache this value somewhere
/// outside of the DeclContext, to reduce the size of DeclContext by
/// another pointer.
mutable Decl *LastDecl = nullptr;

/// Build up a chain of declarations.
///
/// \returns the first/last pair of declarations.
static std::pair<Decl *, Decl *>
BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded);

DeclContext(Decl::Kind K);

1850public:
~DeclContext();

Decl::Kind getDeclKind() const {
  return static_cast<Decl::Kind>(DeclContextBits.DeclKind);
}

const char *getDeclKindName() const;

/// getParent - Returns the containing DeclContext.
DeclContext *getParent() {
  return cast<Decl>(this)->getDeclContext();
}
const DeclContext *getParent() const {
  return const_cast<DeclContext*>(this)->getParent();
}

/// getLexicalParent - Returns the containing lexical DeclContext. May be
/// different from getParent, e.g.:
///
///   namespace A {
///      struct S;
///   }
///   struct A::S {}; // getParent() == namespace 'A'
///                   // getLexicalParent() == translation unit
///
DeclContext *getLexicalParent() {
  return cast<Decl>(this)->getLexicalDeclContext();
}
const DeclContext *getLexicalParent() const {
  return const_cast<DeclContext*>(this)->getLexicalParent();
}

DeclContext *getLookupParent();

const DeclContext *getLookupParent() const {
  return const_cast<DeclContext*>(this)->getLookupParent();
}

ASTContext &getParentASTContext() const {
  return cast<Decl>(this)->getASTContext();
}

bool isClosure() const { return getDeclKind() == Decl::Block; }

/// Return this DeclContext if it is a BlockDecl. Otherwise, return the
/// innermost enclosing BlockDecl or null if there are no enclosing blocks.
const BlockDecl *getInnermostBlockDecl() const;

bool isObjCContainer() const {
  switch (getDeclKind()) {
  case Decl::ObjCCategory:
  case Decl::ObjCCategoryImpl:
  case Decl::ObjCImplementation:
  case Decl::ObjCInterface:
  case Decl::ObjCProtocol:
    return true;
  default:
    return false;
  }
}

bool isFunctionOrMethod() const {
  switch (getDeclKind()) {
  case Decl::Block:
  case Decl::Captured:
  case Decl::ObjCMethod:
    return true;
  default:
    return getDeclKind() >= Decl::firstFunction &&
           getDeclKind() <= Decl::lastFunction;
  }
}

/// Test whether the context supports looking up names.
bool isLookupContext() const {
  return !isFunctionOrMethod() && getDeclKind() != Decl::LinkageSpec &&
         getDeclKind() != Decl::Export;
}

bool isFileContext() const {
  return getDeclKind() == Decl::TranslationUnit ||
         getDeclKind() == Decl::Namespace;
}

bool isTranslationUnit() const {
  return getDeclKind() == Decl::TranslationUnit;
}

bool isRecord() const {
  return getDeclKind() >= Decl::firstRecord &&
         getDeclKind() <= Decl::lastRecord;
}

bool isNamespace() const { return getDeclKind() == Decl::Namespace; }

bool isStdNamespace() const;

bool isInlineNamespace() const;

/// Determines whether this context is dependent on a
/// template parameter.
bool isDependentContext() const;

/// isTransparentContext - Determines whether this context is a
/// "transparent" context, meaning that the members declared in this
/// context are semantically declared in the nearest enclosing
/// non-transparent (opaque) context but are lexically declared in
/// this context. For example, consider the enumerators of an
/// enumeration type:
/// @code
/// enum E {
///   Val1
/// };
/// @endcode
/// Here, E is a transparent context, so its enumerator (Val1) will
/// appear (semantically) that it is in the same context of E.
/// Examples of transparent contexts include: enumerations (except for
/// C++0x scoped enums), and C++ linkage specifications.
bool isTransparentContext() const;

/// Determines whether this context or some of its ancestors is a
/// linkage specification context that specifies C linkage.
bool isExternCContext() const;

/// Retrieve the nearest enclosing C linkage specification context.
const LinkageSpecDecl *getExternCContext() const;

/// Determines whether this context or some of its ancestors is a
/// linkage specification context that specifies C++ linkage.
bool isExternCXXContext() const;

/// Determine whether this declaration context is equivalent
/// to the declaration context DC.
bool Equals(const DeclContext *DC) const {
  return DC && this->getPrimaryContext() == DC->getPrimaryContext();
}

/// Determine whether this declaration context encloses the
/// declaration context DC.
bool Encloses(const DeclContext *DC) const;

/// Find the nearest non-closure ancestor of this context,
/// i.e. the innermost semantic parent of this context which is not
/// a closure.  A context may be its own non-closure ancestor.
Decl *getNonClosureAncestor();
const Decl *getNonClosureAncestor() const {
  return const_cast<DeclContext*>(this)->getNonClosureAncestor();
}

/// getPrimaryContext - There may be many different
/// declarations of the same entity (including forward declarations
/// of classes, multiple definitions of namespaces, etc.), each with
/// a different set of declarations. This routine returns the
/// "primary" DeclContext structure, which will contain the
/// information needed to perform name lookup into this context.
DeclContext *getPrimaryContext();
const DeclContext *getPrimaryContext() const {
  return const_cast<DeclContext*>(this)->getPrimaryContext();
}

/// getRedeclContext - Retrieve the context in which an entity conflicts with
/// other entities of the same name, or where it is a redeclaration if the
/// two entities are compatible. This skips through transparent contexts.
DeclContext *getRedeclContext();
const DeclContext *getRedeclContext() const {
  return const_cast<DeclContext *>(this)->getRedeclContext();
}

/// Retrieve the nearest enclosing namespace context.
DeclContext *getEnclosingNamespaceContext();
const DeclContext *getEnclosingNamespaceContext() const {
  return const_cast<DeclContext *>(this)->getEnclosingNamespaceContext();
}

/// Retrieve the outermost lexically enclosing record context.
RecordDecl *getOuterLexicalRecordContext();
const RecordDecl *getOuterLexicalRecordContext() const {
  return const_cast<DeclContext *>(this)->getOuterLexicalRecordContext();
}

/// Test if this context is part of the enclosing namespace set of
/// the context NS, as defined in C++0x [namespace.def]p9. If either context
/// isn't a namespace, this is equivalent to Equals().
///
/// The enclosing namespace set of a namespace is the namespace and, if it is
/// inline, its enclosing namespace, recursively.
bool InEnclosingNamespaceSetOf(const DeclContext *NS) const;

/// Collects all of the declaration contexts that are semantically
/// connected to this declaration context.
///
/// For declaration contexts that have multiple semantically connected but
/// syntactically distinct contexts, such as C++ namespaces, this routine
/// retrieves the complete set of such declaration contexts in source order.
/// For example, given:
///
/// \code
/// namespace N {
///   int x;
/// }
/// namespace N {
///   int y;
/// }
/// \endcode
///
/// The \c Contexts parameter will contain both definitions of N.
///
/// \param Contexts Will be cleared and set to the set of declaration
/// contexts that are semanticaly connected to this declaration context,
/// in source order, including this context (which may be the only result,
/// for non-namespace contexts).
void collectAllContexts(SmallVectorImpl<DeclContext *> &Contexts);

/// decl_iterator - Iterates through the declarations stored
/// within this context.
class decl_iterator {
  /// Current - The current declaration.
  Decl *Current = nullptr;

public:
  using value_type = Decl *;
  using reference = const value_type &;
  using pointer = const value_type *;
  using iterator_category = std::forward_iterator_tag;
  using difference_type = std::ptrdiff_t;

  decl_iterator() = default;
  explicit decl_iterator(Decl *C) : Current(C) {}

  reference operator*() const { return Current; }

  // This doesn't meet the iterator requirements, but it's convenient
  value_type operator->() const { return Current; }

  decl_iterator& operator++() {
    Current = Current->getNextDeclInContext();
    return *this;
  }

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

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

  friend bool operator!=(decl_iterator x, decl_iterator y) {
    return x.Current != y.Current;
12
←
Assuming 'x.Current' is equal to 'y.Current'→
13
←
Returning zero, which participates in a condition later→
  }
};

using decl_range = llvm::iterator_range<decl_iterator>;

/// decls_begin/decls_end - Iterate over the declarations stored in
/// this context.
decl_range decls() const { return decl_range(decls_begin(), decls_end()); }
decl_iterator decls_begin() const;
decl_iterator decls_end() const { return decl_iterator(); }
bool decls_empty() const;

/// noload_decls_begin/end - Iterate over the declarations stored in this
/// context that are currently loaded; don't attempt to retrieve anything
/// from an external source.
decl_range noload_decls() const {
  return decl_range(noload_decls_begin(), noload_decls_end());
}
decl_iterator noload_decls_begin() const { return decl_iterator(FirstDecl); }
decl_iterator noload_decls_end() const { return decl_iterator(); }

/// specific_decl_iterator - Iterates over a subrange of
/// declarations stored in a DeclContext, providing only those that
/// are of type SpecificDecl (or a class derived from it). This
/// iterator is used, for example, to provide iteration over just
/// the fields within a RecordDecl (with SpecificDecl = FieldDecl).
template<typename SpecificDecl>
class specific_decl_iterator {
  /// Current - The current, underlying declaration iterator, which
  /// will either be NULL or will point to a declaration of
  /// type SpecificDecl.
  DeclContext::decl_iterator Current;

  /// SkipToNextDecl - Advances the current position up to the next
  /// declaration of type SpecificDecl that also meets the criteria
  /// required by Acceptable.
  void SkipToNextDecl() {
    while (*Current && !isa<SpecificDecl>(*Current))
      ++Current;
  }

public:
  using value_type = SpecificDecl *;
  // TODO: Add reference and pointer types (with some appropriate proxy type)
  // if we ever have a need for them.
  using reference = void;
  using pointer = void;
  using difference_type =
      std::iterator_traits<DeclContext::decl_iterator>::difference_type;
  using iterator_category = std::forward_iterator_tag;

  specific_decl_iterator() = default;

  /// specific_decl_iterator - Construct a new iterator over a
  /// subset of the declarations the range [C,
  /// end-of-declarations). If A is non-NULL, it is a pointer to a
  /// member function of SpecificDecl that should return true for
  /// all of the SpecificDecl instances that will be in the subset
  /// of iterators. For example, if you want Objective-C instance
  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
  /// &ObjCMethodDecl::isInstanceMethod.
  explicit specific_decl_iterator(DeclContext::decl_iterator C) : Current(C) {
    SkipToNextDecl();
  }

  value_type operator*() const { return cast<SpecificDecl>(*Current); }

  // This doesn't meet the iterator requirements, but it's convenient
  value_type operator->() const { return **this; }

  specific_decl_iterator& operator++() {
    ++Current;
    SkipToNextDecl();
    return *this;
  }

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

  friend bool operator==(const specific_decl_iterator& x,
                         const specific_decl_iterator& y) {
    return x.Current == y.Current;
  }

  friend bool operator!=(const specific_decl_iterator& x,
                         const specific_decl_iterator& y) {
    return x.Current != y.Current;
11
←
Calling 'operator!='→
14
←
Returning from 'operator!='→
15
←
Returning zero, which participates in a condition later→
  }
};

/// Iterates over a filtered subrange of declarations stored
/// in a DeclContext.
///
/// This iterator visits only those declarations that are of type
/// SpecificDecl (or a class derived from it) and that meet some
/// additional run-time criteria. This iterator is used, for
/// example, to provide access to the instance methods within an
/// Objective-C interface (with SpecificDecl = ObjCMethodDecl and
/// Acceptable = ObjCMethodDecl::isInstanceMethod).
template<typename SpecificDecl, bool (SpecificDecl::*Acceptable)() const>
class filtered_decl_iterator {
  /// Current - The current, underlying declaration iterator, which
  /// will either be NULL or will point to a declaration of
  /// type SpecificDecl.
  DeclContext::decl_iterator Current;

  /// SkipToNextDecl - Advances the current position up to the next
  /// declaration of type SpecificDecl that also meets the criteria
  /// required by Acceptable.
  void SkipToNextDecl() {
    while (*Current &&
           (!isa<SpecificDecl>(*Current) ||
            (Acceptable && !(cast<SpecificDecl>(*Current)->*Acceptable)())))
      ++Current;
  }

public:
  using value_type = SpecificDecl *;
  // TODO: Add reference and pointer types (with some appropriate proxy type)
  // if we ever have a need for them.
  using reference = void;
  using pointer = void;
  using difference_type =
      std::iterator_traits<DeclContext::decl_iterator>::difference_type;
  using iterator_category = std::forward_iterator_tag;

  filtered_decl_iterator() = default;

  /// filtered_decl_iterator - Construct a new iterator over a
  /// subset of the declarations the range [C,
  /// end-of-declarations). If A is non-NULL, it is a pointer to a
  /// member function of SpecificDecl that should return true for
  /// all of the SpecificDecl instances that will be in the subset
  /// of iterators. For example, if you want Objective-C instance
  /// methods, SpecificDecl will be ObjCMethodDecl and A will be
  /// &ObjCMethodDecl::isInstanceMethod.
  explicit filtered_decl_iterator(DeclContext::decl_iterator C) : Current(C) {
    SkipToNextDecl();
  }

  value_type operator*() const { return cast<SpecificDecl>(*Current); }
  value_type operator->() const { return cast<SpecificDecl>(*Current); }

  filtered_decl_iterator& operator++() {
    ++Current;
    SkipToNextDecl();
    return *this;
  }

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

  friend bool operator==(const filtered_decl_iterator& x,
                         const filtered_decl_iterator& y) {
    return x.Current == y.Current;
  }

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

/// Add the declaration D into this context.
///
/// This routine should be invoked when the declaration D has first
/// been declared, to place D into the context where it was
/// (lexically) defined. Every declaration must be added to one
/// (and only one!) context, where it can be visited via
/// [decls_begin(), decls_end()). Once a declaration has been added
/// to its lexical context, the corresponding DeclContext owns the
/// declaration.
///
/// If D is also a NamedDecl, it will be made visible within its
/// semantic context via makeDeclVisibleInContext.
void addDecl(Decl *D);

/// Add the declaration D into this context, but suppress
/// searches for external declarations with the same name.
///
/// Although analogous in function to addDecl, this removes an
/// important check.  This is only useful if the Decl is being
/// added in response to an external search; in all other cases,
/// addDecl() is the right function to use.
/// See the ASTImporter for use cases.
void addDeclInternal(Decl *D);

/// Add the declaration D to this context without modifying
/// any lookup tables.
///
/// This is useful for some operations in dependent contexts where
/// the semantic context might not be dependent;  this basically
/// only happens with friends.
void addHiddenDecl(Decl *D);

/// Removes a declaration from this context.
void removeDecl(Decl *D);

/// Checks whether a declaration is in this context.
bool containsDecl(Decl *D) const;

/// Checks whether a declaration is in this context.
/// This also loads the Decls from the external source before the check.
bool containsDeclAndLoad(Decl *D) const;

using lookup_result = DeclContextLookupResult;
using lookup_iterator = lookup_result::iterator;

/// lookup - Find the declarations (if any) with the given Name in
/// this context. Returns a range of iterators that contains all of
/// the declarations with this name, with object, function, member,
/// and enumerator names preceding any tag name. Note that this
/// routine will not look into parent contexts.
lookup_result lookup(DeclarationName Name) const;

/// Find the declarations with the given name that are visible
/// within this context; don't attempt to retrieve anything from an
/// external source.
lookup_result noload_lookup(DeclarationName Name);

/// A simplistic name lookup mechanism that performs name lookup
/// into this declaration context without consulting the external source.
///
/// This function should almost never be used, because it subverts the
/// usual relationship between a DeclContext and the external source.
/// See the ASTImporter for the (few, but important) use cases.
///
/// FIXME: This is very inefficient; replace uses of it with uses of
/// noload_lookup.
void localUncachedLookup(DeclarationName Name,
                         SmallVectorImpl<NamedDecl *> &Results);

/// Makes a declaration visible within this context.
///
/// This routine makes the declaration D visible to name lookup
/// within this context and, if this is a transparent context,
/// within its parent contexts up to the first enclosing
/// non-transparent context. Making a declaration visible within a
/// context does not transfer ownership of a declaration, and a
/// declaration can be visible in many contexts that aren't its
/// lexical context.
///
/// If D is a redeclaration of an existing declaration that is
/// visible from this context, as determined by
/// NamedDecl::declarationReplaces, the previous declaration will be
/// replaced with D.
void makeDeclVisibleInContext(NamedDecl *D);

/// all_lookups_iterator - An iterator that provides a view over the results
/// of looking up every possible name.
class all_lookups_iterator;

using lookups_range = llvm::iterator_range<all_lookups_iterator>;

lookups_range lookups() const;
// Like lookups(), but avoids loading external declarations.
// If PreserveInternalState, avoids building lookup data structures too.
lookups_range noload_lookups(bool PreserveInternalState) const;

/// Iterators over all possible lookups within this context.
all_lookups_iterator lookups_begin() const;
all_lookups_iterator lookups_end() const;

/// Iterators over all possible lookups within this context that are
/// currently loaded; don't attempt to retrieve anything from an external
/// source.
all_lookups_iterator noload_lookups_begin() const;
all_lookups_iterator noload_lookups_end() const;

struct udir_iterator;

using udir_iterator_base =
    llvm::iterator_adaptor_base<udir_iterator, lookup_iterator,
                                typename lookup_iterator::iterator_category,
                                UsingDirectiveDecl *>;

struct udir_iterator : udir_iterator_base {
  udir_iterator(lookup_iterator I) : udir_iterator_base(I) {}

  UsingDirectiveDecl *operator*() const;
};

using udir_range = llvm::iterator_range<udir_iterator>;

udir_range using_directives() const;

// These are all defined in DependentDiagnostic.h.
class ddiag_iterator;

using ddiag_range = llvm::iterator_range<DeclContext::ddiag_iterator>;

inline ddiag_range ddiags() const;

// Low-level accessors

/// Mark that there are external lexical declarations that we need
/// to include in our lookup table (and that are not available as external
/// visible lookups). These extra lookup results will be found by walking
/// the lexical declarations of this context. This should be used only if
/// setHasExternalLexicalStorage() has been called on any decl context for
/// which this is the primary context.
void setMustBuildLookupTable() {
  assert(this == getPrimaryContext() &&((void)0)
         "should only be called on primary context")((void)0);
  DeclContextBits.HasLazyExternalLexicalLookups = true;
}

/// Retrieve the internal representation of the lookup structure.
/// This may omit some names if we are lazily building the structure.
StoredDeclsMap *getLookupPtr() const { return LookupPtr; }

/// Ensure the lookup structure is fully-built and return it.
StoredDeclsMap *buildLookup();

/// Whether this DeclContext has external storage containing
/// additional declarations that are lexically in this context.
bool hasExternalLexicalStorage() const {
  return DeclContextBits.ExternalLexicalStorage;
}

/// State whether this DeclContext has external storage for
/// declarations lexically in this context.
void setHasExternalLexicalStorage(bool ES = true) const {
  DeclContextBits.ExternalLexicalStorage = ES;
}

/// Whether this DeclContext has external storage containing
/// additional declarations that are visible in this context.
bool hasExternalVisibleStorage() const {
  return DeclContextBits.ExternalVisibleStorage;
}

/// State whether this DeclContext has external storage for
/// declarations visible in this context.
void setHasExternalVisibleStorage(bool ES = true) const {
  DeclContextBits.ExternalVisibleStorage = ES;
  if (ES && LookupPtr)
    DeclContextBits.NeedToReconcileExternalVisibleStorage = true;
}

/// Determine whether the given declaration is stored in the list of
/// declarations lexically within this context.
bool isDeclInLexicalTraversal(const Decl *D) const {
  return D && (D->NextInContextAndBits.getPointer() || D == FirstDecl ||
               D == LastDecl);
}

bool setUseQualifiedLookup(bool use = true) const {
  bool old_value = DeclContextBits.UseQualifiedLookup;
  DeclContextBits.UseQualifiedLookup = use;
  return old_value;
}

bool shouldUseQualifiedLookup() const {
  return DeclContextBits.UseQualifiedLookup;
}

static bool classof(const Decl *D);
static bool classof(const DeclContext *D) { return true; }

void dumpDeclContext() const;
void dumpLookups() const;
void dumpLookups(llvm::raw_ostream &OS, bool DumpDecls = false,
                 bool Deserialize = false) const;

2473private:
/// Whether this declaration context has had externally visible
/// storage added since the last lookup. In this case, \c LookupPtr's
/// invariant may not hold and needs to be fixed before we perform
/// another lookup.
bool hasNeedToReconcileExternalVisibleStorage() const {
  return DeclContextBits.NeedToReconcileExternalVisibleStorage;
}

/// State that this declaration context has had externally visible
/// storage added since the last lookup. In this case, \c LookupPtr's
/// invariant may not hold and needs to be fixed before we perform
/// another lookup.
void setNeedToReconcileExternalVisibleStorage(bool Need = true) const {
  DeclContextBits.NeedToReconcileExternalVisibleStorage = Need;
}

/// If \c true, this context may have local lexical declarations
/// that are missing from the lookup table.
bool hasLazyLocalLexicalLookups() const {
  return DeclContextBits.HasLazyLocalLexicalLookups;
}

/// If \c true, this context may have local lexical declarations
/// that are missing from the lookup table.
void setHasLazyLocalLexicalLookups(bool HasLLLL = true) const {
  DeclContextBits.HasLazyLocalLexicalLookups = HasLLLL;
}

/// If \c true, the external source may have lexical declarations
/// that are missing from the lookup table.
bool hasLazyExternalLexicalLookups() const {
  return DeclContextBits.HasLazyExternalLexicalLookups;
}

/// If \c true, the external source may have lexical declarations
/// that are missing from the lookup table.
void setHasLazyExternalLexicalLookups(bool HasLELL = true) const {
  DeclContextBits.HasLazyExternalLexicalLookups = HasLELL;
}

void reconcileExternalVisibleStorage() const;
bool LoadLexicalDeclsFromExternalStorage() const;

/// Makes a declaration visible within this context, but
/// suppresses searches for external declarations with the same
/// name.
///
/// Analogous to makeDeclVisibleInContext, but for the exclusive
/// use of addDeclInternal().
void makeDeclVisibleInContextInternal(NamedDecl *D);

StoredDeclsMap *CreateStoredDeclsMap(ASTContext &C) const;

void loadLazyLocalLexicalLookups();
void buildLookupImpl(DeclContext *DCtx, bool Internal);
void makeDeclVisibleInContextWithFlags(NamedDecl *D, bool Internal,
                                       bool Rediscoverable);
void makeDeclVisibleInContextImpl(NamedDecl *D, bool Internal);
2532};

2534inline bool Decl::isTemplateParameter() const {
return getKind() == TemplateTypeParm || getKind() == NonTypeTemplateParm ||
       getKind() == TemplateTemplateParm;
2537}

2539// Specialization selected when ToTy is not a known subclass of DeclContext.
2540template <class ToTy,
        bool IsKnownSubtype = ::std::is_base_of<DeclContext, ToTy>::value>
2542struct cast_convert_decl_context {
static const ToTy *doit(const DeclContext *Val) {
  return static_cast<const ToTy*>(Decl::castFromDeclContext(Val));
}

static ToTy *doit(DeclContext *Val) {
  return static_cast<ToTy*>(Decl::castFromDeclContext(Val));
}
2550};

2552// Specialization selected when ToTy is a known subclass of DeclContext.
2553template <class ToTy>
2554struct cast_convert_decl_context<ToTy, true> {
static const ToTy *doit(const DeclContext *Val) {
  return static_cast<const ToTy*>(Val);
}

static ToTy *doit(DeclContext *Val) {
  return static_cast<ToTy*>(Val);
}
2562};

2564} // namespace clang

2566namespace llvm {

2568/// isa<T>(DeclContext*)
2569template <typename To>
2570struct isa_impl<To, ::clang::DeclContext> {
static bool doit(const ::clang::DeclContext &Val) {
  return To::classofKind(Val.getDeclKind());
}
2574};

2576/// cast<T>(DeclContext*)
2577template<class ToTy>
2578struct cast_convert_val<ToTy,
                      const ::clang::DeclContext,const ::clang::DeclContext> {
static const ToTy &doit(const ::clang::DeclContext &Val) {
  return *::clang::cast_convert_decl_context<ToTy>::doit(&Val);
}
2583};

2585template<class ToTy>
2586struct cast_convert_val<ToTy, ::clang::DeclContext, ::clang::DeclContext> {
static ToTy &doit(::clang::DeclContext &Val) {
  return *::clang::cast_convert_decl_context<ToTy>::doit(&Val);
}
2590};

2592template<class ToTy>
2593struct cast_convert_val<ToTy,
                   const ::clang::DeclContext*, const ::clang::DeclContext*> {
static const ToTy *doit(const ::clang::DeclContext *Val) {
  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
}
2598};

2600template<class ToTy>
2601struct cast_convert_val<ToTy, ::clang::DeclContext*, ::clang::DeclContext*> {
static ToTy *doit(::clang::DeclContext *Val) {
  return ::clang::cast_convert_decl_context<ToTy>::doit(Val);
}
2605};

2607/// Implement cast_convert_val for Decl -> DeclContext conversions.
2608template<class FromTy>
2609struct cast_convert_val< ::clang::DeclContext, FromTy, FromTy> {
static ::clang::DeclContext &doit(const FromTy &Val) {
  return *FromTy::castToDeclContext(&Val);
}
2613};

2615template<class FromTy>
2616struct cast_convert_val< ::clang::DeclContext, FromTy*, FromTy*> {
static ::clang::DeclContext *doit(const FromTy *Val) {
  return FromTy::castToDeclContext(Val);
}
2620};

2622template<class FromTy>
2623struct cast_convert_val< const ::clang::DeclContext, FromTy, FromTy> {
static const ::clang::DeclContext &doit(const FromTy &Val) {
  return *FromTy::castToDeclContext(&Val);
}
2627};

2629template<class FromTy>
2630struct cast_convert_val< const ::clang::DeclContext, FromTy*, FromTy*> {
static const ::clang::DeclContext *doit(const FromTy *Val) {
  return FromTy::castToDeclContext(Val);
}
2634};

2636} // namespace llvm

2638#endif // LLVM_CLANG_AST_DECLBASE_H

←

/usr/include/c++/v1/list

1// -*- C++ -*-
2//===---------------------------- list ------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9 
10#ifndef _LIBCPP_LIST
11#define _LIBCPP_LIST
12 
13/*
14    list synopsis
15 
16namespace std
17{
18 
19template <class T, class Alloc = allocator<T> >
20class list
21{
22public:
23 
24    // types:
25    typedef T value_type;
26    typedef Alloc allocator_type;
27    typedef typename allocator_type::reference reference;
28    typedef typename allocator_type::const_reference const_reference;
29    typedef typename allocator_type::pointer pointer;
30    typedef typename allocator_type::const_pointer const_pointer;
31    typedef implementation-defined iterator;
32    typedef implementation-defined const_iterator;
33    typedef implementation-defined size_type;
34    typedef implementation-defined difference_type;
35    typedef reverse_iterator<iterator> reverse_iterator;
36    typedef reverse_iterator<const_iterator> const_reverse_iterator;
37 
38    list()
39        noexcept(is_nothrow_default_constructible<allocator_type>::value);
40    explicit list(const allocator_type& a);
41    explicit list(size_type n);
42    explicit list(size_type n, const allocator_type& a); // C++14
43    list(size_type n, const value_type& value);
44    list(size_type n, const value_type& value, const allocator_type& a);
45    template <class Iter>
46        list(Iter first, Iter last);
47    template <class Iter>
48        list(Iter first, Iter last, const allocator_type& a);
49    list(const list& x);
50    list(const list&, const allocator_type& a);
51    list(list&& x)
52        noexcept(is_nothrow_move_constructible<allocator_type>::value);
53    list(list&&, const allocator_type& a);
54    list(initializer_list<value_type>);
55    list(initializer_list<value_type>, const allocator_type& a);
56 
57    ~list();
58 
59    list& operator=(const list& x);
60    list& operator=(list&& x)
61        noexcept(
62             allocator_type::propagate_on_container_move_assignment::value &&
63             is_nothrow_move_assignable<allocator_type>::value);
64    list& operator=(initializer_list<value_type>);
65    template <class Iter>
66        void assign(Iter first, Iter last);
67    void assign(size_type n, const value_type& t);
68    void assign(initializer_list<value_type>);
69 
70    allocator_type get_allocator() const noexcept;
71 
72    iterator begin() noexcept;
73    const_iterator begin() const noexcept;
74    iterator end() noexcept;
75    const_iterator end() const noexcept;
76    reverse_iterator rbegin() noexcept;
77    const_reverse_iterator rbegin() const noexcept;
78    reverse_iterator rend() noexcept;
79    const_reverse_iterator rend() const noexcept;
80    const_iterator cbegin() const noexcept;
81    const_iterator cend() const noexcept;
82    const_reverse_iterator crbegin() const noexcept;
83    const_reverse_iterator crend() const noexcept;
84 
85    reference front();
86    const_reference front() const;
87    reference back();
88    const_reference back() const;
89 
90    bool empty() const noexcept;
91    size_type size() const noexcept;
92    size_type max_size() const noexcept;
93 
94    template <class... Args>
95        reference emplace_front(Args&&... args); // reference in C++17
96    void pop_front();
97    template <class... Args>
98        reference emplace_back(Args&&... args);  // reference in C++17
99    void pop_back();
100    void push_front(const value_type& x);
101    void push_front(value_type&& x);
102    void push_back(const value_type& x);
103    void push_back(value_type&& x);
104    template <class... Args>
105        iterator emplace(const_iterator position, Args&&... args);
106    iterator insert(const_iterator position, const value_type& x);
107    iterator insert(const_iterator position, value_type&& x);
108    iterator insert(const_iterator position, size_type n, const value_type& x);
109    template <class Iter>
110        iterator insert(const_iterator position, Iter first, Iter last);
111    iterator insert(const_iterator position, initializer_list<value_type> il);
112 
113    iterator erase(const_iterator position);
114    iterator erase(const_iterator position, const_iterator last);
115 
116    void resize(size_type sz);
117    void resize(size_type sz, const value_type& c);
118 
119    void swap(list&)
120        noexcept(allocator_traits<allocator_type>::is_always_equal::value);  // C++17
121    void clear() noexcept;
122 
123    void splice(const_iterator position, list& x);
124    void splice(const_iterator position, list&& x);
125    void splice(const_iterator position, list& x, const_iterator i);
126    void splice(const_iterator position, list&& x, const_iterator i);
127    void splice(const_iterator position, list& x, const_iterator first,
128                                                  const_iterator last);
129    void splice(const_iterator position, list&& x, const_iterator first,
130                                                  const_iterator last);
131 
132    size_type remove(const value_type& value);       // void before C++20
133    template <class Pred>
134      size_type remove_if(Pred pred);                // void before C++20
135    size_type unique();                              // void before C++20
136    template <class BinaryPredicate>
137      size_type unique(BinaryPredicate binary_pred); // void before C++20
138    void merge(list& x);
139    void merge(list&& x);
140    template <class Compare>
141        void merge(list& x, Compare comp);
142    template <class Compare>
143        void merge(list&& x, Compare comp);
144    void sort();
145    template <class Compare>
146        void sort(Compare comp);
147    void reverse() noexcept;
148};
149 
150 
151template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>>
152    list(InputIterator, InputIterator, Allocator = Allocator())
153    -> list<typename iterator_traits<InputIterator>::value_type, Allocator>;  // C++17
154 
155template <class T, class Alloc>
156    bool operator==(const list<T,Alloc>& x, const list<T,Alloc>& y);
157template <class T, class Alloc>
158    bool operator< (const list<T,Alloc>& x, const list<T,Alloc>& y);
159template <class T, class Alloc>
160    bool operator!=(const list<T,Alloc>& x, const list<T,Alloc>& y);
161template <class T, class Alloc>
162    bool operator> (const list<T,Alloc>& x, const list<T,Alloc>& y);
163template <class T, class Alloc>
164    bool operator>=(const list<T,Alloc>& x, const list<T,Alloc>& y);
165template <class T, class Alloc>
166    bool operator<=(const list<T,Alloc>& x, const list<T,Alloc>& y);
167 
168template <class T, class Alloc>
169    void swap(list<T,Alloc>& x, list<T,Alloc>& y)
170         noexcept(noexcept(x.swap(y)));
171 
172template <class T, class Allocator, class U>
173    typename list<T, Allocator>::size_type
174    erase(list<T, Allocator>& c, const U& value);       // C++20
175template <class T, class Allocator, class Predicate>
176    typename list<T, Allocator>::size_type
177    erase_if(list<T, Allocator>& c, Predicate pred);    // C++20
178 
179}  // std
180 
181*/
182 
183#include <__config>
184#include <__debug>
185#include <__utility/forward.h>
186#include <algorithm>
187#include <initializer_list>
188#include <iterator>
189#include <limits>
190#include <memory>
191#include <type_traits>
192#include <version>
193 
194#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
195#pragma GCC system_header
196#endif
197 
198_LIBCPP_PUSH_MACROSpush_macro("min")
 push_macro("max")
199#include <__undef_macros>
200 
201 
202_LIBCPP_BEGIN_NAMESPACE_STDnamespace std { inline namespace __1 {
203 
204template <class _Tp, class _VoidPtr> struct __list_node;
205template <class _Tp, class _VoidPtr> struct __list_node_base;
206 
207template <class _Tp, class _VoidPtr>
208struct __list_node_pointer_traits {
209  typedef typename __rebind_pointer<_VoidPtr, __list_node<_Tp, _VoidPtr> >::type
210        __node_pointer;
211  typedef typename __rebind_pointer<_VoidPtr, __list_node_base<_Tp, _VoidPtr> >::type
212        __base_pointer;
213 
214#if defined(_LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB)
215  typedef __base_pointer __link_pointer;
216#else
217  typedef typename conditional<
218          is_pointer<_VoidPtr>::value,
219          __base_pointer,
220          __node_pointer
221  >::type __link_pointer;
222#endif
223 
224  typedef typename conditional<
225          is_same<__link_pointer, __node_pointer>::value,
226          __base_pointer,
227          __node_pointer
228  >::type __non_link_pointer;
229 
230  static _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
231  __link_pointer __unsafe_link_pointer_cast(__link_pointer __p) {
232      return __p;
233  }
234 
235  static _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
236  __link_pointer __unsafe_link_pointer_cast(__non_link_pointer __p) {
237      return static_cast<__link_pointer>(static_cast<_VoidPtr>(__p));
238  }
239 
240};
241 
242template <class _Tp, class _VoidPtr>
243struct __list_node_base
244{
245    typedef __list_node_pointer_traits<_Tp, _VoidPtr> _NodeTraits;
246    typedef typename _NodeTraits::__node_pointer __node_pointer;
247    typedef typename _NodeTraits::__base_pointer __base_pointer;
248    typedef typename _NodeTraits::__link_pointer __link_pointer;
249 
250    __link_pointer __prev_;
251    __link_pointer __next_;
252 
253    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
254    __list_node_base() : __prev_(_NodeTraits::__unsafe_link_pointer_cast(__self())),
255                         __next_(_NodeTraits::__unsafe_link_pointer_cast(__self())) {}
256 
257    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
258    __base_pointer __self() {
259        return pointer_traits<__base_pointer>::pointer_to(*this);
260    }
261 
262    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
263    __node_pointer __as_node() {
264        return static_cast<__node_pointer>(__self());
265    }
266};
267 
268template <class _Tp, class _VoidPtr>
269struct _LIBCPP_STANDALONE_DEBUG__attribute__((__standalone_debug__)) __list_node
270    : public __list_node_base<_Tp, _VoidPtr>
271{
272    _Tp __value_;
273 
274    typedef __list_node_base<_Tp, _VoidPtr> __base;
275    typedef typename __base::__link_pointer __link_pointer;
276 
277    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
278    __link_pointer __as_link() {
279        return static_cast<__link_pointer>(__base::__self());
280    }
281};
282 
283template <class _Tp, class _Alloc = allocator<_Tp> > class _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) list;
284template <class _Tp, class _Alloc> class __list_imp;
285template <class _Tp, class _VoidPtr> class _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) __list_const_iterator;
286 
287template <class _Tp, class _VoidPtr>
288class _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) __list_iterator
289{
290    typedef __list_node_pointer_traits<_Tp, _VoidPtr> _NodeTraits;
291    typedef typename _NodeTraits::__link_pointer __link_pointer;
292 
293    __link_pointer __ptr_;
294 
295#if _LIBCPP_DEBUG_LEVEL0 == 2
296    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
297    explicit __list_iterator(__link_pointer __p, const void* __c) _NOEXCEPTnoexcept
298        : __ptr_(__p)
299    {
300        __get_db()->__insert_ic(this, __c);
301    }
302#else
303    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
304    explicit __list_iterator(__link_pointer __p) _NOEXCEPTnoexcept : __ptr_(__p) {}
305#endif
306 
307 
308 
309    template<class, class> friend class list;
310    template<class, class> friend class __list_imp;
311    template<class, class> friend class __list_const_iterator;
312public:
313    typedef bidirectional_iterator_tag       iterator_category;
314    typedef _Tp                              value_type;
315    typedef value_type&                      reference;
316    typedef typename __rebind_pointer<_VoidPtr, value_type>::type pointer;
317    typedef typename pointer_traits<pointer>::difference_type difference_type;
318 
319    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
320    __list_iterator() _NOEXCEPTnoexcept : __ptr_(nullptr)
321    {
322#if _LIBCPP_DEBUG_LEVEL0 == 2
323        __get_db()->__insert_i(this);
324#endif
325    }
326 
327#if _LIBCPP_DEBUG_LEVEL0 == 2
328 
329    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
330    __list_iterator(const __list_iterator& __p)
331        : __ptr_(__p.__ptr_)
332    {
333        __get_db()->__iterator_copy(this, &__p);
334    }
335 
336    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
337    ~__list_iterator()
338    {
339        __get_db()->__erase_i(this);
340    }
341 
342    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
343    __list_iterator& operator=(const __list_iterator& __p)
344    {
345        if (this != &__p)
346        {
347            __get_db()->__iterator_copy(this, &__p);
348            __ptr_ = __p.__ptr_;
349        }
350        return *this;
351    }
352 
353#endif // _LIBCPP_DEBUG_LEVEL == 2
354 
355    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
356    reference operator*() const
357    {
358#if _LIBCPP_DEBUG_LEVEL0 == 2
359        _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),((void)0)
360                       "Attempted to dereference a non-dereferenceable list::iterator")((void)0);
361#endif
362        return __ptr_->__as_node()->__value_;
363    }
364    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
365    pointer operator->() const
366    {
367#if _LIBCPP_DEBUG_LEVEL0 == 2
368        _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),((void)0)
369                       "Attempted to dereference a non-dereferenceable list::iterator")((void)0);
370#endif
371        return pointer_traits<pointer>::pointer_to(__ptr_->__as_node()->__value_);
372    }
373 
374    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
375    __list_iterator& operator++()
376    {
377#if _LIBCPP_DEBUG_LEVEL0 == 2
378        _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),((void)0)
379                       "Attempted to increment a non-incrementable list::iterator")((void)0);
380#endif
381        __ptr_ = __ptr_->__next_;
382        return *this;
383    }
384    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
385    __list_iterator operator++(int) {__list_iterator __t(*this); ++(*this); return __t;}
386 
387    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
388    __list_iterator& operator--()
389    {
390#if _LIBCPP_DEBUG_LEVEL0 == 2
391        _LIBCPP_ASSERT(__get_const_db()->__decrementable(this),((void)0)
392                       "Attempted to decrement a non-decrementable list::iterator")((void)0);
393#endif
394        __ptr_ = __ptr_->__prev_;
395        return *this;
396    }
397    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
398    __list_iterator operator--(int) {__list_iterator __t(*this); --(*this); return __t;}
399 
400    friend _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
401    bool operator==(const __list_iterator& __x, const __list_iterator& __y)
402    {
403        return __x.__ptr_ == __y.__ptr_;
404    }
405    friend _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
406     bool operator!=(const __list_iterator& __x, const __list_iterator& __y)
407        {return !(__x == __y);}
408};
409 
410template <class _Tp, class _VoidPtr>
411class _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) __list_const_iterator
412{
413    typedef __list_node_pointer_traits<_Tp, _VoidPtr> _NodeTraits;
414    typedef typename _NodeTraits::__link_pointer __link_pointer;
415 
416    __link_pointer __ptr_;
417 
418#if _LIBCPP_DEBUG_LEVEL0 == 2
419    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
420    explicit __list_const_iterator(__link_pointer __p, const void* __c) _NOEXCEPTnoexcept
421        : __ptr_(__p)
422    {
423        __get_db()->__insert_ic(this, __c);
424    }
425#else
426    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
427    explicit __list_const_iterator(__link_pointer __p) _NOEXCEPTnoexcept : __ptr_(__p) {}
428#endif
429 
430    template<class, class> friend class list;
431    template<class, class> friend class __list_imp;
432public:
433    typedef bidirectional_iterator_tag       iterator_category;
434    typedef _Tp                              value_type;
435    typedef const value_type&                reference;
436    typedef typename __rebind_pointer<_VoidPtr, const value_type>::type pointer;
437    typedef typename pointer_traits<pointer>::difference_type difference_type;
438 
439    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
440    __list_const_iterator() _NOEXCEPTnoexcept : __ptr_(nullptr)
441    {
442#if _LIBCPP_DEBUG_LEVEL0 == 2
443        __get_db()->__insert_i(this);
444#endif
445    }
446    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
447    __list_const_iterator(const __list_iterator<_Tp, _VoidPtr>& __p) _NOEXCEPTnoexcept
448        : __ptr_(__p.__ptr_)
449    {
450#if _LIBCPP_DEBUG_LEVEL0 == 2
451        __get_db()->__iterator_copy(this, &__p);
452#endif
453    }
454 
455#if _LIBCPP_DEBUG_LEVEL0 == 2
456 
457    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
458    __list_const_iterator(const __list_const_iterator& __p)
459        : __ptr_(__p.__ptr_)
460    {
461        __get_db()->__iterator_copy(this, &__p);
462    }
463 
464    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
465    ~__list_const_iterator()
466    {
467        __get_db()->__erase_i(this);
468    }
469 
470    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
471    __list_const_iterator& operator=(const __list_const_iterator& __p)
472    {
473        if (this != &__p)
474        {
475            __get_db()->__iterator_copy(this, &__p);
476            __ptr_ = __p.__ptr_;
477        }
478        return *this;
479    }
480 
481#endif // _LIBCPP_DEBUG_LEVEL == 2
482    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
483    reference operator*() const
484    {
485#if _LIBCPP_DEBUG_LEVEL0 == 2
486        _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),((void)0)
487                       "Attempted to dereference a non-dereferenceable list::const_iterator")((void)0);
488#endif
489        return __ptr_->__as_node()->__value_;
490    }
491    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
492    pointer operator->() const
493    {
494#if _LIBCPP_DEBUG_LEVEL0 == 2
495        _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),((void)0)
496                       "Attempted to dereference a non-dereferenceable list::const_iterator")((void)0);
497#endif
498        return pointer_traits<pointer>::pointer_to(__ptr_->__as_node()->__value_);
499    }
500 
501    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
502    __list_const_iterator& operator++()
503    {
504#if _LIBCPP_DEBUG_LEVEL0 == 2
505        _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),((void)0)
506                       "Attempted to increment a non-incrementable list::const_iterator")((void)0);
507#endif
508        __ptr_ = __ptr_->__next_;
509        return *this;
510    }
511    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
512    __list_const_iterator operator++(int) {__list_const_iterator __t(*this); ++(*this); return __t;}
513 
514    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
515    __list_const_iterator& operator--()
516    {
517#if _LIBCPP_DEBUG_LEVEL0 == 2
518        _LIBCPP_ASSERT(__get_const_db()->__decrementable(this),((void)0)
519                       "Attempted to decrement a non-decrementable list::const_iterator")((void)0);
520#endif
521        __ptr_ = __ptr_->__prev_;
522        return *this;
523    }
524    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
525    __list_const_iterator operator--(int) {__list_const_iterator __t(*this); --(*this); return __t;}
526 
527    friend _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
528    bool operator==(const __list_const_iterator& __x, const __list_const_iterator& __y)
529    {
530        return __x.__ptr_ == __y.__ptr_;
23
←
Assuming '__x.__ptr_' is not equal to '__y.__ptr_'→
24
←
Returning zero, which participates in a condition later→
531    }
532    friend _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
533    bool operator!=(const __list_const_iterator& __x, const __list_const_iterator& __y)
534        {return !(__x == __y);}
22
←
Calling 'operator=='→
25
←
Returning from 'operator=='→
26
←
Returning the value 1, which participates in a condition later→
535};
536 
537template <class _Tp, class _Alloc>
538class __list_imp
539{
540    __list_imp(const __list_imp&);
541    __list_imp& operator=(const __list_imp&);
542public:
543    typedef _Alloc                                                  allocator_type;
544    typedef allocator_traits<allocator_type>                        __alloc_traits;
545    typedef typename __alloc_traits::size_type                      size_type;
546protected:
547    typedef _Tp                                                     value_type;
548    typedef typename __alloc_traits::void_pointer                   __void_pointer;
549    typedef __list_iterator<value_type, __void_pointer>             iterator;
550    typedef __list_const_iterator<value_type, __void_pointer>       const_iterator;
551    typedef __list_node_base<value_type, __void_pointer>            __node_base;
552    typedef __list_node<value_type, __void_pointer>                 __node;
553    typedef typename __rebind_alloc_helper<__alloc_traits, __node>::type __node_allocator;
554    typedef allocator_traits<__node_allocator>                       __node_alloc_traits;
555    typedef typename __node_alloc_traits::pointer                    __node_pointer;
556    typedef typename __node_alloc_traits::pointer                    __node_const_pointer;
557    typedef __list_node_pointer_traits<value_type, __void_pointer> __node_pointer_traits;
558    typedef typename __node_pointer_traits::__link_pointer __link_pointer;
559    typedef __link_pointer __link_const_pointer;
560    typedef typename __alloc_traits::pointer                         pointer;
561    typedef typename __alloc_traits::const_pointer                   const_pointer;
562    typedef typename __alloc_traits::difference_type                 difference_type;
563 
564    typedef typename __rebind_alloc_helper<__alloc_traits, __node_base>::type __node_base_allocator;
565    typedef typename allocator_traits<__node_base_allocator>::pointer __node_base_pointer;
566    static_assert((!is_same<allocator_type, __node_allocator>::value),
567                  "internal allocator type must differ from user-specified "
568                  "type; otherwise overload resolution breaks");
569 
570    __node_base __end_;
571    __compressed_pair<size_type, __node_allocator> __size_alloc_;
572 
573    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
574    __link_pointer __end_as_link() const _NOEXCEPTnoexcept {
575        return __node_pointer_traits::__unsafe_link_pointer_cast(
576                const_cast<__node_base&>(__end_).__self());
577    }
578 
579    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
580          size_type& __sz() _NOEXCEPTnoexcept {return __size_alloc_.first();}
581    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
582    const size_type& __sz() const _NOEXCEPTnoexcept
583        {return __size_alloc_.first();}
584    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
585          __node_allocator& __node_alloc() _NOEXCEPTnoexcept
586          {return __size_alloc_.second();}
587    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
588    const __node_allocator& __node_alloc() const _NOEXCEPTnoexcept
589        {return __size_alloc_.second();}
590 
591    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
592    size_type __node_alloc_max_size() const _NOEXCEPTnoexcept {
593        return __node_alloc_traits::max_size(__node_alloc());
594    }
595    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
596    static void __unlink_nodes(__link_pointer __f, __link_pointer __l) _NOEXCEPTnoexcept;
597 
598    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
599    __list_imp()
600        _NOEXCEPT_(is_nothrow_default_constructible<__node_allocator>::value)noexcept(is_nothrow_default_constructible<__node_allocator
>::value);
601    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
602    __list_imp(const allocator_type& __a);
603    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
604    __list_imp(const __node_allocator& __a);
605#ifndef _LIBCPP_CXX03_LANG
606    __list_imp(__node_allocator&& __a) _NOEXCEPTnoexcept;
607#endif
608    ~__list_imp();
609    void clear() _NOEXCEPTnoexcept;
610    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
611    bool empty() const _NOEXCEPTnoexcept {return __sz() == 0;}
612 
613    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
614    iterator begin() _NOEXCEPTnoexcept
615    {
616#if _LIBCPP_DEBUG_LEVEL0 == 2
617        return iterator(__end_.__next_, this);
618#else
619        return iterator(__end_.__next_);
620#endif
621    }
622    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
623    const_iterator begin() const  _NOEXCEPTnoexcept
624    {
625#if _LIBCPP_DEBUG_LEVEL0 == 2
626        return const_iterator(__end_.__next_, this);
627#else
628        return const_iterator(__end_.__next_);
629#endif
630    }
631    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
632    iterator end() _NOEXCEPTnoexcept
633    {
634#if _LIBCPP_DEBUG_LEVEL0 == 2
635        return iterator(__end_as_link(), this);
636#else
637        return iterator(__end_as_link());
638#endif
639    }
640    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
641    const_iterator end() const _NOEXCEPTnoexcept
642    {
643#if _LIBCPP_DEBUG_LEVEL0 == 2
644        return const_iterator(__end_as_link(), this);
645#else
646        return const_iterator(__end_as_link());
647#endif
648    }
649 
650    void swap(__list_imp& __c)
651#if _LIBCPP_STD_VER14 >= 14
652        _NOEXCEPTnoexcept;
653#else
654        _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value ||noexcept(!__alloc_traits::propagate_on_container_swap::value ||
 __is_nothrow_swappable<allocator_type>::value)
655                    __is_nothrow_swappable<allocator_type>::value)noexcept(!__alloc_traits::propagate_on_container_swap::value ||
 __is_nothrow_swappable<allocator_type>::value);
656#endif
657 
658    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
659    void __copy_assign_alloc(const __list_imp& __c)
660        {__copy_assign_alloc(__c, integral_constant<bool,
661                      __node_alloc_traits::propagate_on_container_copy_assignment::value>());}
662 
663    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
664    void __move_assign_alloc(__list_imp& __c)
665        _NOEXCEPT_(noexcept(!__node_alloc_traits::propagate_on_container_move_assignment
::value || is_nothrow_move_assignable<__node_allocator>
::value)
666            !__node_alloc_traits::propagate_on_container_move_assignment::value ||noexcept(!__node_alloc_traits::propagate_on_container_move_assignment
::value || is_nothrow_move_assignable<__node_allocator>
::value)
667            is_nothrow_move_assignable<__node_allocator>::value)noexcept(!__node_alloc_traits::propagate_on_container_move_assignment
::value || is_nothrow_move_assignable<__node_allocator>
::value)
668        {__move_assign_alloc(__c, integral_constant<bool,
669                      __node_alloc_traits::propagate_on_container_move_assignment::value>());}
670 
671private:
672    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
673    void __copy_assign_alloc(const __list_imp& __c, true_type)
674        {
675            if (__node_alloc() != __c.__node_alloc())
676                clear();
677            __node_alloc() = __c.__node_alloc();
678        }
679 
680    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
681    void __copy_assign_alloc(const __list_imp&, false_type)
682        {}
683 
684    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
685    void __move_assign_alloc(__list_imp& __c, true_type)
686        _NOEXCEPT_(is_nothrow_move_assignable<__node_allocator>::value)noexcept(is_nothrow_move_assignable<__node_allocator>::
value)
687        {
688            __node_alloc() = _VSTDstd::__1::move(__c.__node_alloc());
689        }
690 
691    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
692    void __move_assign_alloc(__list_imp&, false_type)
693        _NOEXCEPTnoexcept
694        {}
695 
696    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
697    void __invalidate_all_iterators() {
698#if _LIBCPP_DEBUG_LEVEL0 == 2
699      __get_db()->__invalidate_all(this);
700#endif
701    }
702};
703 
704// Unlink nodes [__f, __l]
705template <class _Tp, class _Alloc>
706inline
707void
708__list_imp<_Tp, _Alloc>::__unlink_nodes(__link_pointer __f, __link_pointer __l)
709    _NOEXCEPTnoexcept
710{
711    __f->__prev_->__next_ = __l->__next_;
712    __l->__next_->__prev_ = __f->__prev_;
713}
714 
715template <class _Tp, class _Alloc>
716inline
717__list_imp<_Tp, _Alloc>::__list_imp()
718        _NOEXCEPT_(is_nothrow_default_constructible<__node_allocator>::value)noexcept(is_nothrow_default_constructible<__node_allocator
>::value)
719    : __size_alloc_(0, __default_init_tag())
720{
721}
722 
723template <class _Tp, class _Alloc>
724inline
725__list_imp<_Tp, _Alloc>::__list_imp(const allocator_type& __a)
726    : __size_alloc_(0, __node_allocator(__a))
727{
728}
729 
730template <class _Tp, class _Alloc>
731inline __list_imp<_Tp, _Alloc>::__list_imp(const __node_allocator& __a)
732    : __size_alloc_(0, __a) {}
733 
734#ifndef _LIBCPP_CXX03_LANG
735template <class _Tp, class _Alloc>
736inline __list_imp<_Tp, _Alloc>::__list_imp(__node_allocator&& __a) _NOEXCEPTnoexcept
737    : __size_alloc_(0, _VSTDstd::__1::move(__a)) {}
738#endif
739 
740template <class _Tp, class _Alloc>
741__list_imp<_Tp, _Alloc>::~__list_imp() {
742  clear();
743#if _LIBCPP_DEBUG_LEVEL0 == 2
744    __get_db()->__erase_c(this);
745#endif
746}
747 
748template <class _Tp, class _Alloc>
749void
750__list_imp<_Tp, _Alloc>::clear() _NOEXCEPTnoexcept
751{
752    if (!empty())
753    {
754        __node_allocator& __na = __node_alloc();
755        __link_pointer __f = __end_.__next_;
756        __link_pointer __l = __end_as_link();
757        __unlink_nodes(__f, __l->__prev_);
758        __sz() = 0;
759        while (__f != __l)
760        {
761            __node_pointer __np = __f->__as_node();
762            __f = __f->__next_;
763            __node_alloc_traits::destroy(__na, _VSTDstd::__1::addressof(__np->__value_));
764            __node_alloc_traits::deallocate(__na, __np, 1);
765        }
766        __invalidate_all_iterators();
767    }
768}
769 
770template <class _Tp, class _Alloc>
771void
772__list_imp<_Tp, _Alloc>::swap(__list_imp& __c)
773#if _LIBCPP_STD_VER14 >= 14
774        _NOEXCEPTnoexcept
775#else
776        _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value ||noexcept(!__alloc_traits::propagate_on_container_swap::value ||
 __is_nothrow_swappable<allocator_type>::value)
777                    __is_nothrow_swappable<allocator_type>::value)noexcept(!__alloc_traits::propagate_on_container_swap::value ||
 __is_nothrow_swappable<allocator_type>::value)
778#endif
779{
780    _LIBCPP_ASSERT(__alloc_traits::propagate_on_container_swap::value ||((void)0)
781                   this->__node_alloc() == __c.__node_alloc(),((void)0)
782                   "list::swap: Either propagate_on_container_swap must be true"((void)0)
783                   " or the allocators must compare equal")((void)0);
784    using _VSTDstd::__1::swap;
785    _VSTDstd::__1::__swap_allocator(__node_alloc(), __c.__node_alloc());
786    swap(__sz(), __c.__sz());
787    swap(__end_, __c.__end_);
788    if (__sz() == 0)
789        __end_.__next_ = __end_.__prev_ = __end_as_link();
790    else
791        __end_.__prev_->__next_ = __end_.__next_->__prev_ = __end_as_link();
792    if (__c.__sz() == 0)
793        __c.__end_.__next_ = __c.__end_.__prev_ = __c.__end_as_link();
794    else
795        __c.__end_.__prev_->__next_ = __c.__end_.__next_->__prev_ = __c.__end_as_link();
796 
797#if _LIBCPP_DEBUG_LEVEL0 == 2
798    __libcpp_db* __db = __get_db();
799    __c_node* __cn1 = __db->__find_c_and_lock(this);
800    __c_node* __cn2 = __db->__find_c(&__c);
801    _VSTDstd::__1::swap(__cn1->beg_, __cn2->beg_);
802    _VSTDstd::__1::swap(__cn1->end_, __cn2->end_);
803    _VSTDstd::__1::swap(__cn1->cap_, __cn2->cap_);
804    for (__i_node** __p = __cn1->end_; __p != __cn1->beg_;)
805    {
806        --__p;
807        const_iterator* __i = static_cast<const_iterator*>((*__p)->__i_);
808        if (__i->__ptr_ == __c.__end_as_link())
809        {
810            __cn2->__add(*__p);
811            if (--__cn1->end_ != __p)
812                _VSTDstd::__1::memmove(__p, __p+1, (__cn1->end_ - __p)*sizeof(__i_node*));
813        }
814        else
815            (*__p)->__c_ = __cn1;
816    }
817    for (__i_node** __p = __cn2->end_; __p != __cn2->beg_;)
818    {
819        --__p;
820        const_iterator* __i = static_cast<const_iterator*>((*__p)->__i_);
821        if (__i->__ptr_ == __end_as_link())
822        {
823            __cn1->__add(*__p);
824            if (--__cn2->end_ != __p)
825                _VSTDstd::__1::memmove(__p, __p+1, (__cn2->end_ - __p)*sizeof(__i_node*));
826        }
827        else
828            (*__p)->__c_ = __cn2;
829    }
830    __db->unlock();
831#endif
832}
833 
834template <class _Tp, class _Alloc /*= allocator<_Tp>*/>
835class _LIBCPP_TEMPLATE_VIS__attribute__ ((__type_visibility__("default"))) list
836    : private __list_imp<_Tp, _Alloc>
837{
838    typedef __list_imp<_Tp, _Alloc> base;
839    typedef typename base::__node              __node;
840    typedef typename base::__node_allocator    __node_allocator;
841    typedef typename base::__node_pointer      __node_pointer;
842    typedef typename base::__node_alloc_traits __node_alloc_traits;
843    typedef typename base::__node_base         __node_base;
844    typedef typename base::__node_base_pointer __node_base_pointer;
845    typedef typename base::__link_pointer __link_pointer;
846 
847public:
848    typedef _Tp                                      value_type;
849    typedef _Alloc                                   allocator_type;
850    static_assert((is_same<value_type, typename allocator_type::value_type>::value),
851                  "Invalid allocator::value_type");
852    typedef value_type&                              reference;
853    typedef const value_type&                        const_reference;
854    typedef typename base::pointer                   pointer;
855    typedef typename base::const_pointer             const_pointer;
856    typedef typename base::size_type                 size_type;
857    typedef typename base::difference_type           difference_type;
858    typedef typename base::iterator                  iterator;
859    typedef typename base::const_iterator            const_iterator;
860    typedef _VSTDstd::__1::reverse_iterator<iterator>         reverse_iterator;
861    typedef _VSTDstd::__1::reverse_iterator<const_iterator>   const_reverse_iterator;
862#if _LIBCPP_STD_VER14 > 17
863    typedef size_type                                __remove_return_type;
864#else
865    typedef void                                     __remove_return_type;
866#endif
867 
868    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
869    list()
870        _NOEXCEPT_(is_nothrow_default_constructible<__node_allocator>::value)noexcept(is_nothrow_default_constructible<__node_allocator
>::value)
871    {
872#if _LIBCPP_DEBUG_LEVEL0 == 2
873        __get_db()->__insert_c(this);
874#endif
875    }
876    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
877    explicit list(const allocator_type& __a) : base(__a)
878    {
879#if _LIBCPP_DEBUG_LEVEL0 == 2
880        __get_db()->__insert_c(this);
881#endif
882    }
883    explicit list(size_type __n);
884#if _LIBCPP_STD_VER14 > 11
885    explicit list(size_type __n, const allocator_type& __a);
886#endif
887    list(size_type __n, const value_type& __x);
888    list(size_type __n, const value_type& __x, const allocator_type& __a);
889    template <class _InpIter>
890        list(_InpIter __f, _InpIter __l,
891             typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type* = 0);
892    template <class _InpIter>
893        list(_InpIter __f, _InpIter __l, const allocator_type& __a,
894             typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type* = 0);
895 
896    list(const list& __c);
897    list(const list& __c, const __identity_t<allocator_type>& __a);
898    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
899    list& operator=(const list& __c);
900#ifndef _LIBCPP_CXX03_LANG
901    list(initializer_list<value_type> __il);
902    list(initializer_list<value_type> __il, const allocator_type& __a);
903 
904    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
905    list(list&& __c)
906        _NOEXCEPT_(is_nothrow_move_constructible<__node_allocator>::value)noexcept(is_nothrow_move_constructible<__node_allocator>
::value);
907    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
908    list(list&& __c, const __identity_t<allocator_type>& __a);
909    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
910    list& operator=(list&& __c)
911        _NOEXCEPT_(noexcept(__node_alloc_traits::propagate_on_container_move_assignment
::value && is_nothrow_move_assignable<__node_allocator
>::value)
912            __node_alloc_traits::propagate_on_container_move_assignment::value &&noexcept(__node_alloc_traits::propagate_on_container_move_assignment
::value && is_nothrow_move_assignable<__node_allocator
>::value)
913            is_nothrow_move_assignable<__node_allocator>::value)noexcept(__node_alloc_traits::propagate_on_container_move_assignment
::value && is_nothrow_move_assignable<__node_allocator
>::value);
914 
915    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
916    list& operator=(initializer_list<value_type> __il)
917        {assign(__il.begin(), __il.end()); return *this;}
918 
919    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
920    void assign(initializer_list<value_type> __il)
921        {assign(__il.begin(), __il.end());}
922#endif // _LIBCPP_CXX03_LANG
923 
924    template <class _InpIter>
925        void assign(_InpIter __f, _InpIter __l,
926             typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type* = 0);
927    void assign(size_type __n, const value_type& __x);
928 
929    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
930    allocator_type get_allocator() const _NOEXCEPTnoexcept;
931 
932    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
933    size_type size() const _NOEXCEPTnoexcept     {return base::__sz();}
934    _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
935    bool empty() const _NOEXCEPTnoexcept         {return base::empty();}
936    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
937    size_type max_size() const _NOEXCEPTnoexcept
938        {
939            return _VSTDstd::__1::min<size_type>(
940                base::__node_alloc_max_size(),
941                numeric_limits<difference_type >::max());
942        }
943 
944    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
945          iterator begin() _NOEXCEPTnoexcept        {return base::begin();}
946    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
947    const_iterator begin()  const _NOEXCEPTnoexcept {return base::begin();}
948    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
949          iterator end() _NOEXCEPTnoexcept          {return base::end();}
950    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
951    const_iterator end()    const _NOEXCEPTnoexcept {return base::end();}
952    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
953    const_iterator cbegin() const _NOEXCEPTnoexcept {return base::begin();}
954    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
955    const_iterator cend()   const _NOEXCEPTnoexcept {return base::end();}
956 
957    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
958          reverse_iterator rbegin() _NOEXCEPTnoexcept
959            {return       reverse_iterator(end());}
960    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
961    const_reverse_iterator rbegin()  const _NOEXCEPTnoexcept
962        {return const_reverse_iterator(end());}
963    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
964          reverse_iterator rend() _NOEXCEPTnoexcept
965            {return       reverse_iterator(begin());}
966    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
967    const_reverse_iterator rend()    const _NOEXCEPTnoexcept
968        {return const_reverse_iterator(begin());}
969    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
970    const_reverse_iterator crbegin() const _NOEXCEPTnoexcept
971        {return const_reverse_iterator(end());}
972    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
973    const_reverse_iterator crend()   const _NOEXCEPTnoexcept
974        {return const_reverse_iterator(begin());}
975 
976    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
977    reference front()
978    {
979        _LIBCPP_ASSERT(!empty(), "list::front called on empty list")((void)0);
980        return base::__end_.__next_->__as_node()->__value_;
981    }
982    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
983    const_reference front() const
984    {
985        _LIBCPP_ASSERT(!empty(), "list::front called on empty list")((void)0);
986        return base::__end_.__next_->__as_node()->__value_;
987    }
988    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
989    reference back()
990    {
991        _LIBCPP_ASSERT(!empty(), "list::back called on empty list")((void)0);
992        return base::__end_.__prev_->__as_node()->__value_;
993    }
994    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
995    const_reference back() const
996    {
997        _LIBCPP_ASSERT(!empty(), "list::back called on empty list")((void)0);
998        return base::__end_.__prev_->__as_node()->__value_;
999    }
1000 
1001#ifndef _LIBCPP_CXX03_LANG
1002    void push_front(value_type&& __x);
1003    void push_back(value_type&& __x);
1004 
1005    template <class... _Args>
1006#if _LIBCPP_STD_VER14 > 14
1007       reference emplace_front(_Args&&... __args);
1008#else
1009       void      emplace_front(_Args&&... __args);
1010#endif
1011    template <class... _Args>
1012#if _LIBCPP_STD_VER14 > 14
1013        reference emplace_back(_Args&&... __args);
1014#else
1015       void       emplace_back(_Args&&... __args);
1016#endif
1017    template <class... _Args>
1018        iterator emplace(const_iterator __p, _Args&&... __args);
1019 
1020    iterator insert(const_iterator __p, value_type&& __x);
1021 
1022    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1023    iterator insert(const_iterator __p, initializer_list<value_type> __il)
1024        {return insert(__p, __il.begin(), __il.end());}
1025#endif // _LIBCPP_CXX03_LANG
1026 
1027    void push_front(const value_type& __x);
1028    void push_back(const value_type& __x);
1029 
1030#ifndef _LIBCPP_CXX03_LANG
1031    template <class _Arg>
1032    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1033    void __emplace_back(_Arg&& __arg) { emplace_back(_VSTDstd::__1::forward<_Arg>(__arg)); }
1034#else
1035    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1036    void __emplace_back(value_type const& __arg) { push_back(__arg); }
1037#endif
1038 
1039    iterator insert(const_iterator __p, const value_type& __x);
1040    iterator insert(const_iterator __p, size_type __n, const value_type& __x);
1041    template <class _InpIter>
1042        iterator insert(const_iterator __p, _InpIter __f, _InpIter __l,
1043             typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type* = 0);
1044 
1045    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1046    void swap(list& __c)
1047#if _LIBCPP_STD_VER14 >= 14
1048        _NOEXCEPTnoexcept
1049#else
1050        _NOEXCEPT_(!__node_alloc_traits::propagate_on_container_swap::value ||noexcept(!__node_alloc_traits::propagate_on_container_swap::value
 || __is_nothrow_swappable<__node_allocator>::value)
1051                   __is_nothrow_swappable<__node_allocator>::value)noexcept(!__node_alloc_traits::propagate_on_container_swap::value
 || __is_nothrow_swappable<__node_allocator>::value)
1052#endif
1053        {base::swap(__c);}
1054    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1055    void clear() _NOEXCEPTnoexcept {base::clear();}
1056 
1057    void pop_front();
1058    void pop_back();
1059 
1060    iterator erase(const_iterator __p);
1061    iterator erase(const_iterator __f, const_iterator __l);
1062 
1063    void resize(size_type __n);
1064    void resize(size_type __n, const value_type& __x);
1065 
1066    void splice(const_iterator __p, list& __c);
1067#ifndef _LIBCPP_CXX03_LANG
1068    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1069    void splice(const_iterator __p, list&& __c) {splice(__p, __c);}
1070    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1071    void splice(const_iterator __p, list&& __c, const_iterator __i)
1072        {splice(__p, __c, __i);}
1073    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1074    void splice(const_iterator __p, list&& __c, const_iterator __f, const_iterator __l)
1075        {splice(__p, __c, __f, __l);}
1076#endif
1077    void splice(const_iterator __p, list& __c, const_iterator __i);
1078    void splice(const_iterator __p, list& __c, const_iterator __f, const_iterator __l);
1079 
1080    __remove_return_type remove(const value_type& __x);
1081    template <class _Pred> __remove_return_type remove_if(_Pred __pred);
1082    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1083    __remove_return_type unique() { return unique(__equal_to<value_type>()); }
1084    template <class _BinaryPred>
1085        __remove_return_type unique(_BinaryPred __binary_pred);
1086    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1087    void merge(list& __c);
1088#ifndef _LIBCPP_CXX03_LANG
1089    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1090    void merge(list&& __c) {merge(__c);}
1091 
1092    template <class _Comp>
1093    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1094        void merge(list&& __c, _Comp __comp) {merge(__c, __comp);}
1095#endif
1096    template <class _Comp>
1097        void merge(list& __c, _Comp __comp);
1098 
1099    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1100    void sort();
1101    template <class _Comp>
1102        _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1103        void sort(_Comp __comp);
1104 
1105    void reverse() _NOEXCEPTnoexcept;
1106 
1107    bool __invariants() const;
1108 
1109    typedef __allocator_destructor<__node_allocator> __node_destructor;
1110    typedef unique_ptr<__node, __node_destructor> __hold_pointer;
1111 
1112    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1113    __hold_pointer __allocate_node(__node_allocator& __na) {
1114      __node_pointer __p = __node_alloc_traits::allocate(__na, 1);
1115      __p->__prev_ = nullptr;
1116      return __hold_pointer(__p, __node_destructor(__na, 1));
1117    }
1118 
1119#if _LIBCPP_DEBUG_LEVEL0 == 2
1120 
1121    bool __dereferenceable(const const_iterator* __i) const;
1122    bool __decrementable(const const_iterator* __i) const;
1123    bool __addable(const const_iterator* __i, ptrdiff_t __n) const;
1124    bool __subscriptable(const const_iterator* __i, ptrdiff_t __n) const;
1125 
1126#endif // _LIBCPP_DEBUG_LEVEL == 2
1127 
1128private:
1129    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1130    static void __link_nodes  (__link_pointer __p, __link_pointer __f, __link_pointer __l);
1131    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1132    void __link_nodes_at_front(__link_pointer __f, __link_pointer __l);
1133    _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
1134    void __link_nodes_at_back (__link_pointer __f, __link_pointer __l);
1135    iterator __iterator(size_type __n);
1136    template <class _Comp>
1137        static iterator __sort(iterator __f1, iterator __e2, size_type __n, _Comp& __comp);
1138 
1139    void __move_assign(list& __c, true_type)
1140        _NOEXCEPT_(is_nothrow_move_assignable<__node_allocator>::value)noexcept(is_nothrow_move_assignable<__node_allocator>::
value);
1141    void __move_assign(list& __c, false_type);
1142};
1143 
1144#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES
1145template<class _InputIterator,
1146         class _Alloc = allocator<__iter_value_type<_InputIterator>>,
1147         class = _EnableIf<__is_allocator<_Alloc>::value>
1148         >
1149list(_InputIterator, _InputIterator)
1150  -> list<__iter_value_type<_InputIterator>, _Alloc>;
1151 
1152template<class _InputIterator,
1153         class _Alloc,
1154         class = _EnableIf<__is_allocator<_Alloc>::value>
1155         >
1156list(_InputIterator, _InputIterator, _Alloc)
1157  -> list<__iter_value_type<_InputIterator>, _Alloc>;
1158#endif
1159 
1160// Link in nodes [__f, __l] just prior to __p
1161template <class _Tp, class _Alloc>
1162inline
1163void
1164list<_Tp, _Alloc>::__link_nodes(__link_pointer __p, __link_pointer __f, __link_pointer __l)
1165{
1166    __p->__prev_->__next_ = __f;
1167    __f->__prev_ = __p->__prev_;
1168    __p->__prev_ = __l;
1169    __l->__next_ = __p;
1170}
1171 
1172// Link in nodes [__f, __l] at the front of the list
1173template <class _Tp, class _Alloc>
1174inline
1175void
1176list<_Tp, _Alloc>::__link_nodes_at_front(__link_pointer __f, __link_pointer __l)
1177{
1178    __f->__prev_ = base::__end_as_link();
1179    __l->__next_ = base::__end_.__next_;
1180    __l->__next_->__prev_ = __l;
1181    base::__end_.__next_ = __f;
1182}
1183 
1184// Link in nodes [__f, __l] at the back of the list
1185template <class _Tp, class _Alloc>
1186inline
1187void
1188list<_Tp, _Alloc>::__link_nodes_at_back(__link_pointer __f, __link_pointer __l)
1189{
1190    __l->__next_ = base::__end_as_link();
1191    __f->__prev_ = base::__end_.__prev_;
1192    __f->__prev_->__next_ = __f;
1193    base::__end_.__prev_ = __l;
1194}
1195 
1196 
1197template <class _Tp, class _Alloc>
1198inline
1199typename list<_Tp, _Alloc>::iterator
1200list<_Tp, _Alloc>::__iterator(size_type __n)
1201{
1202    return __n <= base::__sz() / 2 ? _VSTDstd::__1::next(begin(), __n)
1203                                   : _VSTDstd::__1::prev(end(), base::__sz() - __n);
1204}
1205 
1206template <class _Tp, class _Alloc>
1207list<_Tp, _Alloc>::list(size_type __n)
1208{
1209#if _LIBCPP_DEBUG_LEVEL0 == 2
1210    __get_db()->__insert_c(this);
1211#endif
1212    for (; __n > 0; --__n)
1213#ifndef _LIBCPP_CXX03_LANG
1214        emplace_back();
1215#else
1216        push_back(value_type());
1217#endif
1218}
1219 
1220#if _LIBCPP_STD_VER14 > 11
1221template <class _Tp, class _Alloc>
1222list<_Tp, _Alloc>::list(size_type __n, const allocator_type& __a) : base(__a)
1223{
1224#if _LIBCPP_DEBUG_LEVEL0 == 2
1225    __get_db()->__insert_c(this);
1226#endif
1227    for (; __n > 0; --__n)
1228        emplace_back();
1229}
1230#endif
1231 
1232template <class _Tp, class _Alloc>
1233list<_Tp, _Alloc>::list(size_type __n, const value_type& __x)
1234{
1235#if _LIBCPP_DEBUG_LEVEL0 == 2
1236    __get_db()->__insert_c(this);
1237#endif
1238    for (; __n > 0; --__n)
1239        push_back(__x);
1240}
1241 
1242template <class _Tp, class _Alloc>
1243list<_Tp, _Alloc>::list(size_type __n, const value_type& __x, const allocator_type& __a)
1244    : base(__a)
1245{
1246#if _LIBCPP_DEBUG_LEVEL0 == 2
1247    __get_db()->__insert_c(this);
1248#endif
1249    for (; __n > 0; --__n)
1250        push_back(__x);
1251}
1252 
1253template <class _Tp, class _Alloc>
1254template <class _InpIter>
1255list<_Tp, _Alloc>::list(_InpIter __f, _InpIter __l,
1256                        typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type*)
1257{
1258#if _LIBCPP_DEBUG_LEVEL0 == 2
1259    __get_db()->__insert_c(this);
1260#endif
1261    for (; __f != __l; ++__f)
1262        __emplace_back(*__f);
1263}
1264 
1265template <class _Tp, class _Alloc>
1266template <class _InpIter>
1267list<_Tp, _Alloc>::list(_InpIter __f, _InpIter __l, const allocator_type& __a,
1268                        typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type*)
1269    : base(__a)
1270{
1271#if _LIBCPP_DEBUG_LEVEL0 == 2
1272    __get_db()->__insert_c(this);
1273#endif
1274    for (; __f != __l; ++__f)
1275        __emplace_back(*__f);
1276}
1277 
1278template <class _Tp, class _Alloc>
1279list<_Tp, _Alloc>::list(const list& __c)
1280    : base(__node_alloc_traits::select_on_container_copy_construction(
1281          __c.__node_alloc())) {
1282#if _LIBCPP_DEBUG_LEVEL0 == 2
1283    __get_db()->__insert_c(this);
1284#endif
1285    for (const_iterator __i = __c.begin(), __e = __c.end(); __i != __e; ++__i)
1286        push_back(*__i);
1287}
1288 
1289template <class _Tp, class _Alloc>
1290list<_Tp, _Alloc>::list(const list& __c, const __identity_t<allocator_type>& __a)
1291    : base(__a)
1292{
1293#if _LIBCPP_DEBUG_LEVEL0 == 2
1294    __get_db()->__insert_c(this);
1295#endif
1296    for (const_iterator __i = __c.begin(), __e = __c.end(); __i != __e; ++__i)
1297        push_back(*__i);
1298}
1299 
1300#ifndef _LIBCPP_CXX03_LANG
1301 
1302template <class _Tp, class _Alloc>
1303list<_Tp, _Alloc>::list(initializer_list<value_type> __il, const allocator_type& __a)
1304    : base(__a)
1305{
1306#if _LIBCPP_DEBUG_LEVEL0 == 2
1307    __get_db()->__insert_c(this);
1308#endif
1309    for (typename initializer_list<value_type>::const_iterator __i = __il.begin(),
1310            __e = __il.end(); __i != __e; ++__i)
1311        push_back(*__i);
1312}
1313 
1314template <class _Tp, class _Alloc>
1315list<_Tp, _Alloc>::list(initializer_list<value_type> __il)
1316{
1317#if _LIBCPP_DEBUG_LEVEL0 == 2
1318    __get_db()->__insert_c(this);
1319#endif
1320    for (typename initializer_list<value_type>::const_iterator __i = __il.begin(),
1321            __e = __il.end(); __i != __e; ++__i)
1322        push_back(*__i);
1323}
1324 
1325template <class _Tp, class _Alloc>
1326inline list<_Tp, _Alloc>::list(list&& __c)
1327    _NOEXCEPT_(is_nothrow_move_constructible<__node_allocator>::value)noexcept(is_nothrow_move_constructible<__node_allocator>
::value)
1328    : base(_VSTDstd::__1::move(__c.__node_alloc())) {
1329#if _LIBCPP_DEBUG_LEVEL0 == 2
1330    __get_db()->__insert_c(this);
1331#endif
1332    splice(end(), __c);
1333}
1334 
1335template <class _Tp, class _Alloc>
1336inline
1337list<_Tp, _Alloc>::list(list&& __c, const __identity_t<allocator_type>& __a)
1338    : base(__a)
1339{
1340#if _LIBCPP_DEBUG_LEVEL0 == 2
1341    __get_db()->__insert_c(this);
1342#endif
1343    if (__a == __c.get_allocator())
1344        splice(end(), __c);
1345    else
1346    {
1347        typedef move_iterator<iterator> _Ip;
1348        assign(_Ip(__c.begin()), _Ip(__c.end()));
1349    }
1350}
1351 
1352template <class _Tp, class _Alloc>
1353inline
1354list<_Tp, _Alloc>&
1355list<_Tp, _Alloc>::operator=(list&& __c)
1356        _NOEXCEPT_(noexcept(__node_alloc_traits::propagate_on_container_move_assignment
::value && is_nothrow_move_assignable<__node_allocator
>::value)
1357            __node_alloc_traits::propagate_on_container_move_assignment::value &&noexcept(__node_alloc_traits::propagate_on_container_move_assignment
::value && is_nothrow_move_assignable<__node_allocator
>::value)
1358            is_nothrow_move_assignable<__node_allocator>::value)noexcept(__node_alloc_traits::propagate_on_container_move_assignment
::value && is_nothrow_move_assignable<__node_allocator
>::value)
1359{
1360    __move_assign(__c, integral_constant<bool,
1361          __node_alloc_traits::propagate_on_container_move_assignment::value>());
1362    return *this;
1363}
1364 
1365template <class _Tp, class _Alloc>
1366void
1367list<_Tp, _Alloc>::__move_assign(list& __c, false_type)
1368{
1369    if (base::__node_alloc() != __c.__node_alloc())
1370    {
1371        typedef move_iterator<iterator> _Ip;
1372        assign(_Ip(__c.begin()), _Ip(__c.end()));
1373    }
1374    else
1375        __move_assign(__c, true_type());
1376}
1377 
1378template <class _Tp, class _Alloc>
1379void
1380list<_Tp, _Alloc>::__move_assign(list& __c, true_type)
1381        _NOEXCEPT_(is_nothrow_move_assignable<__node_allocator>::value)noexcept(is_nothrow_move_assignable<__node_allocator>::
value)
1382{
1383    clear();
1384    base::__move_assign_alloc(__c);
1385    splice(end(), __c);
1386}
1387 
1388#endif // _LIBCPP_CXX03_LANG
1389 
1390template <class _Tp, class _Alloc>
1391inline
1392list<_Tp, _Alloc>&
1393list<_Tp, _Alloc>::operator=(const list& __c)
1394{
1395    if (this != &__c)
1396    {
1397        base::__copy_assign_alloc(__c);
1398        assign(__c.begin(), __c.end());
1399    }
1400    return *this;
1401}
1402 
1403template <class _Tp, class _Alloc>
1404template <class _InpIter>
1405void
1406list<_Tp, _Alloc>::assign(_InpIter __f, _InpIter __l,
1407                          typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type*)
1408{
1409    iterator __i = begin();
1410    iterator __e = end();
1411    for (; __f != __l && __i != __e; ++__f, ++__i)
1412        *__i = *__f;
1413    if (__i == __e)
1414        insert(__e, __f, __l);
1415    else
1416        erase(__i, __e);
1417#if _LIBCPP_DEBUG_LEVEL0 == 2
1418      __get_db()->__invalidate_all(this);
1419#endif
1420}
1421 
1422template <class _Tp, class _Alloc>
1423void
1424list<_Tp, _Alloc>::assign(size_type __n, const value_type& __x)
1425{
1426    iterator __i = begin();
1427    iterator __e = end();
1428    for (; __n > 0 && __i != __e; --__n, ++__i)
1429        *__i = __x;
1430    if (__i == __e)
1431        insert(__e, __n, __x);
1432    else
1433        erase(__i, __e);
1434#if _LIBCPP_DEBUG_LEVEL0 == 2
1435      __get_db()->__invalidate_all(this);
1436#endif
1437}
1438 
1439template <class _Tp, class _Alloc>
1440inline
1441_Alloc
1442list<_Tp, _Alloc>::get_allocator() const _NOEXCEPTnoexcept
1443{
1444    return allocator_type(base::__node_alloc());
1445}
1446 
1447template <class _Tp, class _Alloc>
1448typename list<_Tp, _Alloc>::iterator
1449list<_Tp, _Alloc>::insert(const_iterator __p, const value_type& __x)
1450{
1451#if _LIBCPP_DEBUG_LEVEL0 == 2
1452    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,((void)0)
1453        "list::insert(iterator, x) called with an iterator not"((void)0)
1454        " referring to this list")((void)0);
1455#endif
1456    __node_allocator& __na = base::__node_alloc();
1457    __hold_pointer __hold = __allocate_node(__na);
1458    __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), __x);
1459    __link_nodes(__p.__ptr_, __hold->__as_link(), __hold->__as_link());
1460    ++base::__sz();
1461#if _LIBCPP_DEBUG_LEVEL0 == 2
1462    return iterator(__hold.release()->__as_link(), this);
1463#else
1464    return iterator(__hold.release()->__as_link());
1465#endif
1466}
1467 
1468template <class _Tp, class _Alloc>
1469typename list<_Tp, _Alloc>::iterator
1470list<_Tp, _Alloc>::insert(const_iterator __p, size_type __n, const value_type& __x)
1471{
1472#if _LIBCPP_DEBUG_LEVEL0 == 2
1473    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,((void)0)
1474        "list::insert(iterator, n, x) called with an iterator not"((void)0)
1475        " referring to this list")((void)0);
1476    iterator __r(__p.__ptr_, this);
1477#else
1478    iterator __r(__p.__ptr_);
1479#endif
1480    if (__n > 0)
1481    {
1482        size_type __ds = 0;
1483        __node_allocator& __na = base::__node_alloc();
1484        __hold_pointer __hold = __allocate_node(__na);
1485        __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), __x);
1486        ++__ds;
1487#if _LIBCPP_DEBUG_LEVEL0 == 2
1488        __r = iterator(__hold->__as_link(), this);
1489#else
1490        __r = iterator(__hold->__as_link());
1491#endif
1492        __hold.release();
1493        iterator __e = __r;
1494#ifndef _LIBCPP_NO_EXCEPTIONS
1495        try
1496        {
1497#endif // _LIBCPP_NO_EXCEPTIONS
1498            for (--__n; __n != 0; --__n, ++__e, ++__ds)
1499            {
1500                __hold.reset(__node_alloc_traits::allocate(__na, 1));
1501                __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), __x);
1502                __e.__ptr_->__next_ = __hold->__as_link();
1503                __hold->__prev_ = __e.__ptr_;
1504                __hold.release();
1505            }
1506#ifndef _LIBCPP_NO_EXCEPTIONS
1507        }
1508        catch (...)
1509        {
1510            while (true)
1511            {
1512                __node_alloc_traits::destroy(__na, _VSTDstd::__1::addressof(*__e));
1513                __link_pointer __prev = __e.__ptr_->__prev_;
1514                __node_alloc_traits::deallocate(__na, __e.__ptr_->__as_node(), 1);
1515                if (__prev == 0)
1516                    break;
1517#if _LIBCPP_DEBUG_LEVEL0 == 2
1518                __e = iterator(__prev, this);
1519#else
1520                __e = iterator(__prev);
1521#endif
1522            }
1523            throw;
1524        }
1525#endif // _LIBCPP_NO_EXCEPTIONS
1526        __link_nodes(__p.__ptr_, __r.__ptr_, __e.__ptr_);
1527        base::__sz() += __ds;
1528    }
1529    return __r;
1530}
1531 
1532template <class _Tp, class _Alloc>
1533template <class _InpIter>
1534typename list<_Tp, _Alloc>::iterator
1535list<_Tp, _Alloc>::insert(const_iterator __p, _InpIter __f, _InpIter __l,
1536             typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type*)
1537{
1538#if _LIBCPP_DEBUG_LEVEL0 == 2
1539    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,((void)0)
1540        "list::insert(iterator, range) called with an iterator not"((void)0)
1541        " referring to this list")((void)0);
1542    iterator __r(__p.__ptr_, this);
1543#else
1544    iterator __r(__p.__ptr_);
1545#endif
1546    if (__f != __l)
1547    {
1548        size_type __ds = 0;
1549        __node_allocator& __na = base::__node_alloc();
1550        __hold_pointer __hold = __allocate_node(__na);
1551        __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), *__f);
1552        ++__ds;
1553#if _LIBCPP_DEBUG_LEVEL0 == 2
1554        __r = iterator(__hold.get()->__as_link(), this);
1555#else
1556        __r = iterator(__hold.get()->__as_link());
1557#endif
1558        __hold.release();
1559        iterator __e = __r;
1560#ifndef _LIBCPP_NO_EXCEPTIONS
1561        try
1562        {
1563#endif // _LIBCPP_NO_EXCEPTIONS
1564            for (++__f; __f != __l; ++__f, (void) ++__e, (void) ++__ds)
1565            {
1566                __hold.reset(__node_alloc_traits::allocate(__na, 1));
1567                __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), *__f);
1568                __e.__ptr_->__next_ = __hold.get()->__as_link();
1569                __hold->__prev_ = __e.__ptr_;
1570                __hold.release();
1571            }
1572#ifndef _LIBCPP_NO_EXCEPTIONS
1573        }
1574        catch (...)
1575        {
1576            while (true)
1577            {
1578                __node_alloc_traits::destroy(__na, _VSTDstd::__1::addressof(*__e));
1579                __link_pointer __prev = __e.__ptr_->__prev_;
1580                __node_alloc_traits::deallocate(__na, __e.__ptr_->__as_node(), 1);
1581                if (__prev == 0)
1582                    break;
1583#if _LIBCPP_DEBUG_LEVEL0 == 2
1584                __e = iterator(__prev, this);
1585#else
1586                __e = iterator(__prev);
1587#endif
1588            }
1589            throw;
1590        }
1591#endif // _LIBCPP_NO_EXCEPTIONS
1592        __link_nodes(__p.__ptr_, __r.__ptr_, __e.__ptr_);
1593        base::__sz() += __ds;
1594    }
1595    return __r;
1596}
1597 
1598template <class _Tp, class _Alloc>
1599void
1600list<_Tp, _Alloc>::push_front(const value_type& __x)
1601{
1602    __node_allocator& __na = base::__node_alloc();
1603    __hold_pointer __hold = __allocate_node(__na);
1604    __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), __x);
1605    __link_pointer __nl = __hold->__as_link();
1606    __link_nodes_at_front(__nl, __nl);
1607    ++base::__sz();
1608    __hold.release();
1609}
1610 
1611template <class _Tp, class _Alloc>
1612void
1613list<_Tp, _Alloc>::push_back(const value_type& __x)
1614{
1615    __node_allocator& __na = base::__node_alloc();
1616    __hold_pointer __hold = __allocate_node(__na);
1617    __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), __x);
1618    __link_nodes_at_back(__hold.get()->__as_link(), __hold.get()->__as_link());
1619    ++base::__sz();
1620    __hold.release();
1621}
1622 
1623#ifndef _LIBCPP_CXX03_LANG
1624 
1625template <class _Tp, class _Alloc>
1626void
1627list<_Tp, _Alloc>::push_front(value_type&& __x)
1628{
1629    __node_allocator& __na = base::__node_alloc();
1630    __hold_pointer __hold = __allocate_node(__na);
1631    __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), _VSTDstd::__1::move(__x));
1632    __link_nodes_at_front(__hold.get()->__as_link(), __hold.get()->__as_link());
1633    ++base::__sz();
1634    __hold.release();
1635}
1636 
1637template <class _Tp, class _Alloc>
1638void
1639list<_Tp, _Alloc>::push_back(value_type&& __x)
1640{
1641    __node_allocator& __na = base::__node_alloc();
1642    __hold_pointer __hold = __allocate_node(__na);
1643    __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), _VSTDstd::__1::move(__x));
1644    __link_nodes_at_back(__hold.get()->__as_link(), __hold.get()->__as_link());
1645    ++base::__sz();
1646    __hold.release();
1647}
1648 
1649template <class _Tp, class _Alloc>
1650template <class... _Args>
1651#if _LIBCPP_STD_VER14 > 14
1652typename list<_Tp, _Alloc>::reference
1653#else
1654void
1655#endif
1656list<_Tp, _Alloc>::emplace_front(_Args&&... __args)
1657{
1658    __node_allocator& __na = base::__node_alloc();
1659    __hold_pointer __hold = __allocate_node(__na);
1660    __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), _VSTDstd::__1::forward<_Args>(__args)...);
1661    __link_nodes_at_front(__hold.get()->__as_link(), __hold.get()->__as_link());
1662    ++base::__sz();
1663#if _LIBCPP_STD_VER14 > 14
1664    return __hold.release()->__value_;
1665#else
1666    __hold.release();
1667#endif
1668}
1669 
1670template <class _Tp, class _Alloc>
1671template <class... _Args>
1672#if _LIBCPP_STD_VER14 > 14
1673typename list<_Tp, _Alloc>::reference
1674#else
1675void
1676#endif
1677list<_Tp, _Alloc>::emplace_back(_Args&&... __args)
1678{
1679    __node_allocator& __na = base::__node_alloc();
1680    __hold_pointer __hold = __allocate_node(__na);
1681    __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), _VSTDstd::__1::forward<_Args>(__args)...);
1682    __link_pointer __nl = __hold->__as_link();
1683    __link_nodes_at_back(__nl, __nl);
1684    ++base::__sz();
1685#if _LIBCPP_STD_VER14 > 14
1686    return __hold.release()->__value_;
1687#else
1688    __hold.release();
1689#endif
1690}
1691 
1692template <class _Tp, class _Alloc>
1693template <class... _Args>
1694typename list<_Tp, _Alloc>::iterator
1695list<_Tp, _Alloc>::emplace(const_iterator __p, _Args&&... __args)
1696{
1697#if _LIBCPP_DEBUG_LEVEL0 == 2
1698    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,((void)0)
1699        "list::emplace(iterator, args...) called with an iterator not"((void)0)
1700        " referring to this list")((void)0);
1701#endif
1702    __node_allocator& __na = base::__node_alloc();
1703    __hold_pointer __hold = __allocate_node(__na);
1704    __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), _VSTDstd::__1::forward<_Args>(__args)...);
1705    __link_pointer __nl = __hold.get()->__as_link();
1706    __link_nodes(__p.__ptr_, __nl, __nl);
1707    ++base::__sz();
1708    __hold.release();
1709#if _LIBCPP_DEBUG_LEVEL0 == 2
1710    return iterator(__nl, this);
1711#else
1712    return iterator(__nl);
1713#endif
1714}
1715 
1716template <class _Tp, class _Alloc>
1717typename list<_Tp, _Alloc>::iterator
1718list<_Tp, _Alloc>::insert(const_iterator __p, value_type&& __x)
1719{
1720#if _LIBCPP_DEBUG_LEVEL0 == 2
1721    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,((void)0)
1722        "list::insert(iterator, x) called with an iterator not"((void)0)
1723        " referring to this list")((void)0);
1724#endif
1725    __node_allocator& __na = base::__node_alloc();
1726    __hold_pointer __hold = __allocate_node(__na);
1727    __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), _VSTDstd::__1::move(__x));
1728    __link_pointer __nl = __hold->__as_link();
1729    __link_nodes(__p.__ptr_, __nl, __nl);
1730    ++base::__sz();
1731    __hold.release();
1732#if _LIBCPP_DEBUG_LEVEL0 == 2
1733    return iterator(__nl, this);
1734#else
1735    return iterator(__nl);
1736#endif
1737}
1738 
1739#endif // _LIBCPP_CXX03_LANG
1740 
1741template <class _Tp, class _Alloc>
1742void
1743list<_Tp, _Alloc>::pop_front()
1744{
1745    _LIBCPP_ASSERT(!empty(), "list::pop_front() called with empty list")((void)0);
1746    __node_allocator& __na = base::__node_alloc();
1747    __link_pointer __n = base::__end_.__next_;
1748    base::__unlink_nodes(__n, __n);
1749    --base::__sz();
1750#if _LIBCPP_DEBUG_LEVEL0 == 2
1751    __c_node* __c = __get_db()->__find_c_and_lock(this);
1752    for (__i_node** __p = __c->end_; __p != __c->beg_; )
1753    {
1754        --__p;
1755        iterator* __i = static_cast<iterator*>((*__p)->__i_);
1756        if (__i->__ptr_ == __n)
1757        {
1758            (*__p)->__c_ = nullptr;
1759            if (--__c->end_ != __p)
1760                _VSTDstd::__1::memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*));
1761        }
1762    }
1763    __get_db()->unlock();
1764#endif
1765    __node_pointer __np = __n->__as_node();
1766    __node_alloc_traits::destroy(__na, _VSTDstd::__1::addressof(__np->__value_));
1767    __node_alloc_traits::deallocate(__na, __np, 1);
1768}
1769 
1770template <class _Tp, class _Alloc>
1771void
1772list<_Tp, _Alloc>::pop_back()
1773{
1774    _LIBCPP_ASSERT(!empty(), "list::pop_back() called on an empty list")((void)0);
1775    __node_allocator& __na = base::__node_alloc();
1776    __link_pointer __n = base::__end_.__prev_;
1777    base::__unlink_nodes(__n, __n);
1778    --base::__sz();
1779#if _LIBCPP_DEBUG_LEVEL0 == 2
1780    __c_node* __c = __get_db()->__find_c_and_lock(this);
1781    for (__i_node** __p = __c->end_; __p != __c->beg_; )
1782    {
1783        --__p;
1784        iterator* __i = static_cast<iterator*>((*__p)->__i_);
1785        if (__i->__ptr_ == __n)
1786        {
1787            (*__p)->__c_ = nullptr;
1788            if (--__c->end_ != __p)
1789                _VSTDstd::__1::memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*));
1790        }
1791    }
1792    __get_db()->unlock();
1793#endif
1794    __node_pointer __np = __n->__as_node();
1795    __node_alloc_traits::destroy(__na, _VSTDstd::__1::addressof(__np->__value_));
1796    __node_alloc_traits::deallocate(__na, __np, 1);
1797}
1798 
1799template <class _Tp, class _Alloc>
1800typename list<_Tp, _Alloc>::iterator
1801list<_Tp, _Alloc>::erase(const_iterator __p)
1802{
1803#if _LIBCPP_DEBUG_LEVEL0 == 2
1804    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,((void)0)
1805        "list::erase(iterator) called with an iterator not"((void)0)
1806        " referring to this list")((void)0);
1807#endif
1808    _LIBCPP_ASSERT(__p != end(),((void)0)
1809        "list::erase(iterator) called with a non-dereferenceable iterator")((void)0);
1810    __node_allocator& __na = base::__node_alloc();
1811    __link_pointer __n = __p.__ptr_;
1812    __link_pointer __r = __n->__next_;
1813    base::__unlink_nodes(__n, __n);
1814    --base::__sz();
1815#if _LIBCPP_DEBUG_LEVEL0 == 2
1816    __c_node* __c = __get_db()->__find_c_and_lock(this);
1817    for (__i_node** __ip = __c->end_; __ip != __c->beg_; )
1818    {
1819        --__ip;
1820        iterator* __i = static_cast<iterator*>((*__ip)->__i_);
1821        if (__i->__ptr_ == __n)
1822        {
1823            (*__ip)->__c_ = nullptr;
1824            if (--__c->end_ != __ip)
1825                _VSTDstd::__1::memmove(__ip, __ip+1, (__c->end_ - __ip)*sizeof(__i_node*));
1826        }
1827    }
1828    __get_db()->unlock();
1829#endif
1830    __node_pointer __np = __n->__as_node();
1831    __node_alloc_traits::destroy(__na, _VSTDstd::__1::addressof(__np->__value_));
1832    __node_alloc_traits::deallocate(__na, __np, 1);
1833#if _LIBCPP_DEBUG_LEVEL0 == 2
1834    return iterator(__r, this);
1835#else
1836    return iterator(__r);
1837#endif
1838}
1839 
1840template <class _Tp, class _Alloc>
1841typename list<_Tp, _Alloc>::iterator
1842list<_Tp, _Alloc>::erase(const_iterator __f, const_iterator __l)
1843{
1844#if _LIBCPP_DEBUG_LEVEL0 == 2
1845    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__f) == this,((void)0)
1846        "list::erase(iterator, iterator) called with an iterator not"((void)0)
1847        " referring to this list")((void)0);
1848   _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__l) == this,((void)0)
1849        "list::erase(iterator, iterator) called with an iterator not"((void)0)
1850        " referring to this list")((void)0);
1851#endif
1852    if (__f != __l)
1853    {
1854        __node_allocator& __na = base::__node_alloc();
1855        base::__unlink_nodes(__f.__ptr_, __l.__ptr_->__prev_);
1856        while (__f != __l)
1857        {
1858            __link_pointer __n = __f.__ptr_;
1859            ++__f;
1860            --base::__sz();
1861#if _LIBCPP_DEBUG_LEVEL0 == 2
1862            __c_node* __c = __get_db()->__find_c_and_lock(this);
1863            for (__i_node** __p = __c->end_; __p != __c->beg_; )
1864            {
1865                --__p;
1866                iterator* __i = static_cast<iterator*>((*__p)->__i_);
1867                if (__i->__ptr_ == __n)
1868                {
1869                    (*__p)->__c_ = nullptr;
1870                    if (--__c->end_ != __p)
1871                        _VSTDstd::__1::memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*));
1872                }
1873            }
1874            __get_db()->unlock();
1875#endif
1876            __node_pointer __np = __n->__as_node();
1877            __node_alloc_traits::destroy(__na, _VSTDstd::__1::addressof(__np->__value_));
1878            __node_alloc_traits::deallocate(__na, __np, 1);
1879        }
1880    }
1881#if _LIBCPP_DEBUG_LEVEL0 == 2
1882    return iterator(__l.__ptr_, this);
1883#else
1884    return iterator(__l.__ptr_);
1885#endif
1886}
1887 
1888template <class _Tp, class _Alloc>
1889void
1890list<_Tp, _Alloc>::resize(size_type __n)
1891{
1892    if (__n < base::__sz())
1893        erase(__iterator(__n), end());
1894    else if (__n > base::__sz())
1895    {
1896        __n -= base::__sz();
1897        size_type __ds = 0;
1898        __node_allocator& __na = base::__node_alloc();
1899        __hold_pointer __hold = __allocate_node(__na);
1900        __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_));
1901        ++__ds;
1902#if _LIBCPP_DEBUG_LEVEL0 == 2
1903        iterator __r = iterator(__hold.release()->__as_link(), this);
1904#else
1905        iterator __r = iterator(__hold.release()->__as_link());
1906#endif
1907        iterator __e = __r;
1908#ifndef _LIBCPP_NO_EXCEPTIONS
1909        try
1910        {
1911#endif // _LIBCPP_NO_EXCEPTIONS
1912            for (--__n; __n != 0; --__n, ++__e, ++__ds)
1913            {
1914                __hold.reset(__node_alloc_traits::allocate(__na, 1));
1915                __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_));
1916                __e.__ptr_->__next_ = __hold.get()->__as_link();
1917                __hold->__prev_ = __e.__ptr_;
1918                __hold.release();
1919            }
1920#ifndef _LIBCPP_NO_EXCEPTIONS
1921        }
1922        catch (...)
1923        {
1924            while (true)
1925            {
1926                __node_alloc_traits::destroy(__na, _VSTDstd::__1::addressof(*__e));
1927                __link_pointer __prev = __e.__ptr_->__prev_;
1928                __node_alloc_traits::deallocate(__na, __e.__ptr_->__as_node(), 1);
1929                if (__prev == 0)
1930                    break;
1931#if _LIBCPP_DEBUG_LEVEL0 == 2
1932                __e = iterator(__prev, this);
1933#else
1934                __e = iterator(__prev);
1935#endif
1936            }
1937            throw;
1938        }
1939#endif // _LIBCPP_NO_EXCEPTIONS
1940        __link_nodes_at_back(__r.__ptr_, __e.__ptr_);
1941        base::__sz() += __ds;
1942    }
1943}
1944 
1945template <class _Tp, class _Alloc>
1946void
1947list<_Tp, _Alloc>::resize(size_type __n, const value_type& __x)
1948{
1949    if (__n < base::__sz())
1950        erase(__iterator(__n), end());
1951    else if (__n > base::__sz())
1952    {
1953        __n -= base::__sz();
1954        size_type __ds = 0;
1955        __node_allocator& __na = base::__node_alloc();
1956        __hold_pointer __hold = __allocate_node(__na);
1957        __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), __x);
1958        ++__ds;
1959        __link_pointer __nl = __hold.release()->__as_link();
1960#if _LIBCPP_DEBUG_LEVEL0 == 2
1961        iterator __r = iterator(__nl, this);
1962#else
1963        iterator __r = iterator(__nl);
1964#endif
1965        iterator __e = __r;
1966#ifndef _LIBCPP_NO_EXCEPTIONS
1967        try
1968        {
1969#endif // _LIBCPP_NO_EXCEPTIONS
1970            for (--__n; __n != 0; --__n, ++__e, ++__ds)
1971            {
1972                __hold.reset(__node_alloc_traits::allocate(__na, 1));
1973                __node_alloc_traits::construct(__na, _VSTDstd::__1::addressof(__hold->__value_), __x);
1974                __e.__ptr_->__next_ = __hold.get()->__as_link();
1975                __hold->__prev_ = __e.__ptr_;
1976                __hold.release();
1977            }
1978#ifndef _LIBCPP_NO_EXCEPTIONS
1979        }
1980        catch (...)
1981        {
1982            while (true)
1983            {
1984                __node_alloc_traits::destroy(__na, _VSTDstd::__1::addressof(*__e));
1985                __link_pointer __prev = __e.__ptr_->__prev_;
1986                __node_alloc_traits::deallocate(__na, __e.__ptr_->__as_node(), 1);
1987                if (__prev == 0)
1988                    break;
1989#if _LIBCPP_DEBUG_LEVEL0 == 2
1990                __e = iterator(__prev, this);
1991#else
1992                __e = iterator(__prev);
1993#endif
1994            }
1995            throw;
1996        }
1997#endif // _LIBCPP_NO_EXCEPTIONS
1998        __link_nodes(base::__end_as_link(), __r.__ptr_, __e.__ptr_);
1999        base::__sz() += __ds;
2000    }
2001}
2002 
2003template <class _Tp, class _Alloc>
2004void
2005list<_Tp, _Alloc>::splice(const_iterator __p, list& __c)
2006{
2007    _LIBCPP_ASSERT(this != &__c,((void)0)
2008                   "list::splice(iterator, list) called with this == &list")((void)0);
2009#if _LIBCPP_DEBUG_LEVEL0 == 2
2010    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,((void)0)
2011        "list::splice(iterator, list) called with an iterator not"((void)0)
2012        " referring to this list")((void)0);
2013#endif
2014    if (!__c.empty())
2015    {
2016        __link_pointer __f = __c.__end_.__next_;
2017        __link_pointer __l = __c.__end_.__prev_;
2018        base::__unlink_nodes(__f, __l);
2019        __link_nodes(__p.__ptr_, __f, __l);
2020        base::__sz() += __c.__sz();
2021        __c.__sz() = 0;
2022#if _LIBCPP_DEBUG_LEVEL0 == 2
2023        if (&__c != this) {
2024            __libcpp_db* __db = __get_db();
2025            __c_node* __cn1 = __db->__find_c_and_lock(this);
2026            __c_node* __cn2 = __db->__find_c(&__c);
2027            for (__i_node** __ip = __cn2->end_; __ip != __cn2->beg_;)
2028            {
2029                --__ip;
2030                iterator* __i = static_cast<iterator*>((*__ip)->__i_);
2031                if (__i->__ptr_ != __c.__end_as_link())
2032                {
2033                    __cn1->__add(*__ip);
2034                    (*__ip)->__c_ = __cn1;
2035                    if (--__cn2->end_ != __ip)
2036                        _VSTDstd::__1::memmove(__ip, __ip+1, (__cn2->end_ - __ip)*sizeof(__i_node*));
2037                }
2038            }
2039            __db->unlock();
2040        }
2041#endif
2042    }
2043}
2044 
2045template <class _Tp, class _Alloc>
2046void
2047list<_Tp, _Alloc>::splice(const_iterator __p, list& __c, const_iterator __i)
2048{
2049#if _LIBCPP_DEBUG_LEVEL0 == 2
2050    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,((void)0)
2051        "list::splice(iterator, list, iterator) called with the first iterator"((void)0)
2052        " not referring to this list")((void)0);
2053    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__i) == &__c,((void)0)
2054        "list::splice(iterator, list, iterator) called with the second iterator"((void)0)
2055        " not referring to the list argument")((void)0);
2056    _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(&__i),((void)0)
2057        "list::splice(iterator, list, iterator) called with the second iterator"((void)0)
2058        " not dereferenceable")((void)0);
2059#endif
2060    if (__p.__ptr_ != __i.__ptr_ && __p.__ptr_ != __i.__ptr_->__next_)
2061    {
2062        __link_pointer __f = __i.__ptr_;
2063        base::__unlink_nodes(__f, __f);
2064        __link_nodes(__p.__ptr_, __f, __f);
2065        --__c.__sz();
2066        ++base::__sz();
2067#if _LIBCPP_DEBUG_LEVEL0 == 2
2068        if (&__c != this) {
2069            __libcpp_db* __db = __get_db();
2070            __c_node* __cn1 = __db->__find_c_and_lock(this);
2071            __c_node* __cn2 = __db->__find_c(&__c);
2072            for (__i_node** __ip = __cn2->end_; __ip != __cn2->beg_;)
2073            {
2074                --__ip;
2075                iterator* __j = static_cast<iterator*>((*__ip)->__i_);
2076                if (__j->__ptr_ == __f)
2077                {
2078                    __cn1->__add(*__ip);
2079                    (*__ip)->__c_ = __cn1;
2080                    if (--__cn2->end_ != __ip)
2081                        _VSTDstd::__1::memmove(__ip, __ip+1, (__cn2->end_ - __ip)*sizeof(__i_node*));
2082                }
2083            }
2084            __db->unlock();
2085        }
2086#endif
2087    }
2088}
2089 
2090template <class _Tp, class _Alloc>
2091void
2092list<_Tp, _Alloc>::splice(const_iterator __p, list& __c, const_iterator __f, const_iterator __l)
2093{
2094#if _LIBCPP_DEBUG_LEVEL0 == 2
2095    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,((void)0)
2096        "list::splice(iterator, list, iterator, iterator) called with first iterator not"((void)0)
2097        " referring to this list")((void)0);
2098    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__f) == &__c,((void)0)
2099        "list::splice(iterator, list, iterator, iterator) called with second iterator not"((void)0)
2100        " referring to the list argument")((void)0);
2101    _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__l) == &__c,((void)0)
2102        "list::splice(iterator, list, iterator, iterator) called with third iterator not"((void)0)
2103        " referring to the list argument")((void)0);
2104    if (this == &__c)
2105    {
2106        for (const_iterator __i = __f; __i != __l; ++__i)
2107            _LIBCPP_ASSERT(__i != __p,((void)0)
2108                           "list::splice(iterator, list, iterator, iterator)"((void)0)
2109                           " called with the first iterator within the range"((void)0)
2110                           " of the second and third iterators")((void)0);
2111    }
2112#endif
2113    if (__f != __l)
2114    {
2115        __link_pointer __first = __f.__ptr_;
2116        --__l;
2117        __link_pointer __last = __l.__ptr_;
2118        if (this != &__c)
2119        {
2120            size_type __s = _VSTDstd::__1::distance(__f, __l) + 1;
2121            __c.__sz() -= __s;
2122            base::__sz() += __s;
2123        }
2124        base::__unlink_nodes(__first, __last);
2125        __link_nodes(__p.__ptr_, __first, __last);
2126#if _LIBCPP_DEBUG_LEVEL0 == 2
2127        if (&__c != this) {
2128            __libcpp_db* __db = __get_db();
2129            __c_node* __cn1 = __db->__find_c_and_lock(this);
2130            __c_node* __cn2 = __db->__find_c(&__c);
2131            for (__i_node** __ip = __cn2->end_; __ip != __cn2->beg_;)
2132            {
2133                --__ip;
2134                iterator* __j = static_cast<iterator*>((*__ip)->__i_);
2135                for (__link_pointer __k = __f.__ptr_;
2136                                              __k != __l.__ptr_; __k = __k->__next_)
2137                {
2138                    if (__j->__ptr_ == __k)
2139                    {
2140                        __cn1->__add(*__ip);
2141                        (*__ip)->__c_ = __cn1;
2142                        if (--__cn2->end_ != __ip)
2143                            _VSTDstd::__1::memmove(__ip, __ip+1, (__cn2->end_ - __ip)*sizeof(__i_node*));
2144                    }
2145                }
2146            }
2147            __db->unlock();
2148        }
2149#endif
2150    }
2151}
2152 
2153template <class _Tp, class _Alloc>
2154typename list<_Tp, _Alloc>::__remove_return_type
2155list<_Tp, _Alloc>::remove(const value_type& __x)
2156{
2157    list<_Tp, _Alloc> __deleted_nodes(get_allocator()); // collect the nodes we're removing
2158    for (const_iterator __i = begin(), __e = end(); __i != __e;)
2159    {
2160        if (*__i == __x)
2161        {
2162            const_iterator __j = _VSTDstd::__1::next(__i);
2163            for (; __j != __e && *__j == __x; ++__j)
2164                ;
2165            __deleted_nodes.splice(__deleted_nodes.end(), *this, __i, __j);
2166            __i = __j;
2167            if (__i != __e)
2168                ++__i;
2169        }
2170        else
2171            ++__i;
2172    }
2173 
2174    return (__remove_return_type) __deleted_nodes.size();
2175}
2176 
2177template <class _Tp, class _Alloc>
2178template <class _Pred>
2179typename list<_Tp, _Alloc>::__remove_return_type
2180list<_Tp, _Alloc>::remove_if(_Pred __pred)
2181{
2182    list<_Tp, _Alloc> __deleted_nodes(get_allocator()); // collect the nodes we're removing
2183    for (iterator __i = begin(), __e = end(); __i != __e;)
2184    {
2185        if (__pred(*__i))
2186        {
2187            iterator __j = _VSTDstd::__1::next(__i);
2188            for (; __j != __e && __pred(*__j); ++__j)
2189                ;
2190            __deleted_nodes.splice(__deleted_nodes.end(), *this, __i, __j);
2191            __i = __j;
2192            if (__i != __e)
2193                ++__i;
2194        }
2195        else
2196            ++__i;
2197    }
2198 
2199    return (__remove_return_type) __deleted_nodes.size();
2200}
2201 
2202template <class _Tp, class _Alloc>
2203template <class _BinaryPred>
2204typename list<_Tp, _Alloc>::__remove_return_type
2205list<_Tp, _Alloc>::unique(_BinaryPred __binary_pred)
2206{
2207    list<_Tp, _Alloc> __deleted_nodes(get_allocator()); // collect the nodes we're removing
2208    for (iterator __i = begin(), __e = end(); __i != __e;)
2209    {
2210        iterator __j = _VSTDstd::__1::next(__i);
2211        for (; __j != __e && __binary_pred(*__i, *__j); ++__j)
2212            ;
2213        if (++__i != __j) {
2214            __deleted_nodes.splice(__deleted_nodes.end(), *this, __i, __j);
2215            __i = __j;
2216            }
2217    }
2218 
2219    return (__remove_return_type) __deleted_nodes.size();
2220}
2221 
2222template <class _Tp, class _Alloc>
2223inline
2224void
2225list<_Tp, _Alloc>::merge(list& __c)
2226{
2227    merge(__c, __less<value_type>());
2228}
2229 
2230template <class _Tp, class _Alloc>
2231template <class _Comp>
2232void
2233list<_Tp, _Alloc>::merge(list& __c, _Comp __comp)
2234{
2235    if (this != _VSTDstd::__1::addressof(__c))
2236    {
2237        iterator __f1 = begin();
2238        iterator __e1 = end();
2239        iterator __f2 = __c.begin();
2240        iterator __e2 = __c.end();
2241        while (__f1 != __e1 && __f2 != __e2)
2242        {
2243            if (__comp(*__f2, *__f1))
2244            {
2245                size_type __ds = 1;
2246                iterator __m2 = _VSTDstd::__1::next(__f2);
2247                for (; __m2 != __e2 && __comp(*__m2, *__f1); ++__m2, ++__ds)
2248                    ;
2249                base::__sz() += __ds;
2250                __c.__sz() -= __ds;
2251                __link_pointer __f = __f2.__ptr_;
2252                __link_pointer __l = __m2.__ptr_->__prev_;
2253                __f2 = __m2;
2254                base::__unlink_nodes(__f, __l);
2255                __m2 = _VSTDstd::__1::next(__f1);
2256                __link_nodes(__f1.__ptr_, __f, __l);
2257                __f1 = __m2;
2258            }
2259            else
2260                ++__f1;
2261        }
2262        splice(__e1, __c);
2263#if _LIBCPP_DEBUG_LEVEL0 == 2
2264        __libcpp_db* __db = __get_db();
2265        __c_node* __cn1 = __db->__find_c_and_lock(this);
2266        __c_node* __cn2 = __db->__find_c(&__c);
2267        for (__i_node** __p = __cn2->end_; __p != __cn2->beg_;)
2268        {
2269            --__p;
2270            iterator* __i = static_cast<iterator*>((*__p)->__i_);
2271            if (__i->__ptr_ != __c.__end_as_link())
2272            {
2273                __cn1->__add(*__p);
2274                (*__p)->__c_ = __cn1;
2275                if (--__cn2->end_ != __p)
2276                    _VSTDstd::__1::memmove(__p, __p+1, (__cn2->end_ - __p)*sizeof(__i_node*));
2277            }
2278        }
2279        __db->unlock();
2280#endif
2281    }
2282}
2283 
2284template <class _Tp, class _Alloc>
2285inline
2286void
2287list<_Tp, _Alloc>::sort()
2288{
2289    sort(__less<value_type>());
2290}
2291 
2292template <class _Tp, class _Alloc>
2293template <class _Comp>
2294inline
2295void
2296list<_Tp, _Alloc>::sort(_Comp __comp)
2297{
2298    __sort(begin(), end(), base::__sz(), __comp);
2299}
2300 
2301template <class _Tp, class _Alloc>
2302template <class _Comp>
2303typename list<_Tp, _Alloc>::iterator
2304list<_Tp, _Alloc>::__sort(iterator __f1, iterator __e2, size_type __n, _Comp& __comp)
2305{
2306    switch (__n)
2307    {
2308    case 0:
2309    case 1:
2310        return __f1;
2311    case 2:
2312        if (__comp(*--__e2, *__f1))
2313        {
2314            __link_pointer __f = __e2.__ptr_;
2315            base::__unlink_nodes(__f, __f);
2316            __link_nodes(__f1.__ptr_, __f, __f);
2317            return __e2;
2318        }
2319        return __f1;
2320    }
2321    size_type __n2 = __n / 2;
2322    iterator __e1 = _VSTDstd::__1::next(__f1, __n2);
2323    iterator  __r = __f1 = __sort(__f1, __e1, __n2, __comp);
2324    iterator __f2 = __e1 = __sort(__e1, __e2, __n - __n2, __comp);
2325    if (__comp(*__f2, *__f1))
2326    {
2327        iterator __m2 = _VSTDstd::__1::next(__f2);
2328        for (; __m2 != __e2 && __comp(*__m2, *__f1); ++__m2)
2329            ;
2330        __link_pointer __f = __f2.__ptr_;
2331        __link_pointer __l = __m2.__ptr_->__prev_;
2332        __r = __f2;
2333        __e1 = __f2 = __m2;
2334        base::__unlink_nodes(__f, __l);
2335        __m2 = _VSTDstd::__1::next(__f1);
2336        __link_nodes(__f1.__ptr_, __f, __l);
2337        __f1 = __m2;
2338    }
2339    else
2340        ++__f1;
2341    while (__f1 != __e1 && __f2 != __e2)
2342    {
2343        if (__comp(*__f2, *__f1))
2344        {
2345            iterator __m2 = _VSTDstd::__1::next(__f2);
2346            for (; __m2 != __e2 && __comp(*__m2, *__f1); ++__m2)
2347                ;
2348            __link_pointer __f = __f2.__ptr_;
2349            __link_pointer __l = __m2.__ptr_->__prev_;
2350            if (__e1 == __f2)
2351                __e1 = __m2;
2352            __f2 = __m2;
2353            base::__unlink_nodes(__f, __l);
2354            __m2 = _VSTDstd::__1::next(__f1);
2355            __link_nodes(__f1.__ptr_, __f, __l);
2356            __f1 = __m2;
2357        }
2358        else
2359            ++__f1;
2360    }
2361    return __r;
2362}
2363 
2364template <class _Tp, class _Alloc>
2365void
2366list<_Tp, _Alloc>::reverse() _NOEXCEPTnoexcept
2367{
2368    if (base::__sz() > 1)
2369    {
2370        iterator __e = end();
2371        for (iterator __i = begin(); __i.__ptr_ != __e.__ptr_;)
2372        {
2373            _VSTDstd::__1::swap(__i.__ptr_->__prev_, __i.__ptr_->__next_);
2374            __i.__ptr_ = __i.__ptr_->__prev_;
2375        }
2376        _VSTDstd::__1::swap(__e.__ptr_->__prev_, __e.__ptr_->__next_);
2377    }
2378}
2379 
2380template <class _Tp, class _Alloc>
2381bool
2382list<_Tp, _Alloc>::__invariants() const
2383{
2384    return size() == _VSTDstd::__1::distance(begin(), end());
2385}
2386 
2387#if _LIBCPP_DEBUG_LEVEL0 == 2
2388 
2389template <class _Tp, class _Alloc>
2390bool
2391list<_Tp, _Alloc>::__dereferenceable(const const_iterator* __i) const
2392{
2393    return __i->__ptr_ != this->__end_as_link();
2394}
2395 
2396template <class _Tp, class _Alloc>
2397bool
2398list<_Tp, _Alloc>::__decrementable(const const_iterator* __i) const
2399{
2400    return !empty() &&  __i->__ptr_ != base::__end_.__next_;
2401}
2402 
2403template <class _Tp, class _Alloc>
2404bool
2405list<_Tp, _Alloc>::__addable(const const_iterator*, ptrdiff_t) const
2406{
2407    return false;
2408}
2409 
2410template <class _Tp, class _Alloc>
2411bool
2412list<_Tp, _Alloc>::__subscriptable(const const_iterator*, ptrdiff_t) const
2413{
2414    return false;
2415}
2416 
2417#endif // _LIBCPP_DEBUG_LEVEL == 2
2418 
2419template <class _Tp, class _Alloc>
2420inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
2421bool
2422operator==(const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
2423{
2424    return __x.size() == __y.size() && _VSTDstd::__1::equal(__x.begin(), __x.end(), __y.begin());
2425}
2426 
2427template <class _Tp, class _Alloc>
2428inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
2429bool
2430operator< (const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
2431{
2432    return _VSTDstd::__1::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
2433}
2434 
2435template <class _Tp, class _Alloc>
2436inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
2437bool
2438operator!=(const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
2439{
2440    return !(__x == __y);
2441}
2442 
2443template <class _Tp, class _Alloc>
2444inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
2445bool
2446operator> (const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
2447{
2448    return __y < __x;
2449}
2450 
2451template <class _Tp, class _Alloc>
2452inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
2453bool
2454operator>=(const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
2455{
2456    return !(__x < __y);
2457}
2458 
2459template <class _Tp, class _Alloc>
2460inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
2461bool
2462operator<=(const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
2463{
2464    return !(__y < __x);
2465}
2466 
2467template <class _Tp, class _Alloc>
2468inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
))
2469void
2470swap(list<_Tp, _Alloc>& __x, list<_Tp, _Alloc>& __y)
2471    _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))noexcept(noexcept(__x.swap(__y)))
2472{
2473    __x.swap(__y);
2474}
2475 
2476#if _LIBCPP_STD_VER14 > 17
2477template <class _Tp, class _Allocator, class _Predicate>
2478inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
)) typename list<_Tp, _Allocator>::size_type
2479erase_if(list<_Tp, _Allocator>& __c, _Predicate __pred) {
2480  return __c.remove_if(__pred);
2481}
2482 
2483template <class _Tp, class _Allocator, class _Up>
2484inline _LIBCPP_INLINE_VISIBILITY__attribute__ ((__visibility__("hidden"))) __attribute__ ((__exclude_from_explicit_instantiation__
)) typename list<_Tp, _Allocator>::size_type
2485erase(list<_Tp, _Allocator>& __c, const _Up& __v) {
2486  return _VSTDstd::__1::erase_if(__c, [&](auto& __elem) { return __elem == __v; });
2487}
2488#endif
2489 
2490_LIBCPP_END_NAMESPACE_STD} }
2491 
2492_LIBCPP_POP_MACROSpop_macro("min")
 pop_macro("max")
2493 
2494#endif // _LIBCPP_LIST