/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 3157, column 33 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) {
1
Assuming 'type' is non-null→
2
←
Taking true branch→
  clang::QualType qual_type = RemoveWrappingTypes(GetCanonicalQualType(type));

  if (qual_type->isBlockPointerType()) {
3
←
Calling 'Type::isBlockPointerType'→
6
←
Returning from 'Type::isBlockPointerType'→
7
←
Taking true branch→
    if (function_pointer_type_ptr) {
8
←
Assuming 'function_pointer_type_ptr' is non-null→
9
←
Taking true branch→
      const clang::BlockPointerType *block_pointer_type =
11
←
'block_pointer_type' initialized to a null pointer value→
          qual_type->getAs<clang::BlockPointerType>();
10
←
Assuming the object is not a 'BlockPointerType'→
      QualType pointee_type = block_pointer_type->getPointeeType();
12
←
Called C++ object pointer is null
      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]) {
  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);

      // 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) {
        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_decl) {
        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(
                [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) {
            const size_t num_path_elements = path->size();
            for (size_t e = 0; e < num_path_elements; ++e) {
              clang::CXXBasePathElement elem = (*path)[e];

              child_idx = GetIndexForRecordBase(parent_record_decl, elem.Base,
                                                omit_empty_base_classes);
              if (child_idx == UINT32_MAX0xffffffffU) {
                child_indexes.clear();
                return 0;
              } else {
                child_indexes.push_back(child_idx);
                parent_record_decl = llvm::cast<clang::RecordDecl>(
                    elem.Base->getType()
                        ->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/Type.h

1//===- Type.h - C Language Family Type Representation -----------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9/// \file
10/// C Language Family Type Representation
11///
12/// This file defines the clang::Type interface and subclasses, used to
13/// represent types for languages in the C family.
14//
15//===----------------------------------------------------------------------===//

17#ifndef LLVM_CLANG_AST_TYPE_H
18#define LLVM_CLANG_AST_TYPE_H

20#include "clang/AST/DependenceFlags.h"
21#include "clang/AST/NestedNameSpecifier.h"
22#include "clang/AST/TemplateName.h"
23#include "clang/Basic/AddressSpaces.h"
24#include "clang/Basic/AttrKinds.h"
25#include "clang/Basic/Diagnostic.h"
26#include "clang/Basic/ExceptionSpecificationType.h"
27#include "clang/Basic/LLVM.h"
28#include "clang/Basic/Linkage.h"
29#include "clang/Basic/PartialDiagnostic.h"
30#include "clang/Basic/SourceLocation.h"
31#include "clang/Basic/Specifiers.h"
32#include "clang/Basic/Visibility.h"
33#include "llvm/ADT/APInt.h"
34#include "llvm/ADT/APSInt.h"
35#include "llvm/ADT/ArrayRef.h"
36#include "llvm/ADT/FoldingSet.h"
37#include "llvm/ADT/None.h"
38#include "llvm/ADT/Optional.h"
39#include "llvm/ADT/PointerIntPair.h"
40#include "llvm/ADT/PointerUnion.h"
41#include "llvm/ADT/StringRef.h"
42#include "llvm/ADT/Twine.h"
43#include "llvm/ADT/iterator_range.h"
44#include "llvm/Support/Casting.h"
45#include "llvm/Support/Compiler.h"
46#include "llvm/Support/ErrorHandling.h"
47#include "llvm/Support/PointerLikeTypeTraits.h"
48#include "llvm/Support/TrailingObjects.h"
49#include "llvm/Support/type_traits.h"
50#include <cassert>
51#include <cstddef>
52#include <cstdint>
53#include <cstring>
54#include <string>
55#include <type_traits>
56#include <utility>

58namespace clang {

60class ExtQuals;
61class QualType;
62class ConceptDecl;
63class TagDecl;
64class TemplateParameterList;
65class Type;

67enum {
TypeAlignmentInBits = 4,
TypeAlignment = 1 << TypeAlignmentInBits
70};

72namespace serialization {
template <class T> class AbstractTypeReader;
template <class T> class AbstractTypeWriter;
75}

77} // namespace clang

79namespace llvm {

template <typename T>
struct PointerLikeTypeTraits;
template<>
struct PointerLikeTypeTraits< ::clang::Type*> {
  static inline void *getAsVoidPointer(::clang::Type *P) { return P; }

  static inline ::clang::Type *getFromVoidPointer(void *P) {
    return static_cast< ::clang::Type*>(P);
  }

  static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits;
};

template<>
struct PointerLikeTypeTraits< ::clang::ExtQuals*> {
  static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; }

  static inline ::clang::ExtQuals *getFromVoidPointer(void *P) {
    return static_cast< ::clang::ExtQuals*>(P);
  }

  static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits;
};

105} // namespace llvm

107namespace clang {

109class ASTContext;
110template <typename> class CanQual;
111class CXXRecordDecl;
112class DeclContext;
113class EnumDecl;
114class Expr;
115class ExtQualsTypeCommonBase;
116class FunctionDecl;
117class IdentifierInfo;
118class NamedDecl;
119class ObjCInterfaceDecl;
120class ObjCProtocolDecl;
121class ObjCTypeParamDecl;
122struct PrintingPolicy;
123class RecordDecl;
124class Stmt;
125class TagDecl;
126class TemplateArgument;
127class TemplateArgumentListInfo;
128class TemplateArgumentLoc;
129class TemplateTypeParmDecl;
130class TypedefNameDecl;
131class UnresolvedUsingTypenameDecl;

133using CanQualType = CanQual<Type>;

135// Provide forward declarations for all of the *Type classes.
136#define TYPE(Class, Base) class Class##Type;
137#include "clang/AST/TypeNodes.inc"

139/// The collection of all-type qualifiers we support.
140/// Clang supports five independent qualifiers:
141/// * C99: const, volatile, and restrict
142/// * MS: __unaligned
143/// * Embedded C (TR18037): address spaces
144/// * Objective C: the GC attributes (none, weak, or strong)
145class Qualifiers {
146public:
enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ.
  Const    = 0x1,
  Restrict = 0x2,
  Volatile = 0x4,
  CVRMask = Const | Volatile | Restrict
};

enum GC {
  GCNone = 0,
  Weak,
  Strong
};

enum ObjCLifetime {
  /// There is no lifetime qualification on this type.
  OCL_None,

  /// This object can be modified without requiring retains or
  /// releases.
  OCL_ExplicitNone,

  /// Assigning into this object requires the old value to be
  /// released and the new value to be retained.  The timing of the
  /// release of the old value is inexact: it may be moved to
  /// immediately after the last known point where the value is
  /// live.
  OCL_Strong,

  /// Reading or writing from this object requires a barrier call.
  OCL_Weak,

  /// Assigning into this object requires a lifetime extension.
  OCL_Autoreleasing
};

enum {
  /// The maximum supported address space number.
  /// 23 bits should be enough for anyone.
  MaxAddressSpace = 0x7fffffu,

  /// The width of the "fast" qualifier mask.
  FastWidth = 3,

  /// The fast qualifier mask.
  FastMask = (1 << FastWidth) - 1
};

/// Returns the common set of qualifiers while removing them from
/// the given sets.
static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) {
  // If both are only CVR-qualified, bit operations are sufficient.
  if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) {
    Qualifiers Q;
    Q.Mask = L.Mask & R.Mask;
    L.Mask &= ~Q.Mask;
    R.Mask &= ~Q.Mask;
    return Q;
  }

  Qualifiers Q;
  unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers();
  Q.addCVRQualifiers(CommonCRV);
  L.removeCVRQualifiers(CommonCRV);
  R.removeCVRQualifiers(CommonCRV);

  if (L.getObjCGCAttr() == R.getObjCGCAttr()) {
    Q.setObjCGCAttr(L.getObjCGCAttr());
    L.removeObjCGCAttr();
    R.removeObjCGCAttr();
  }

  if (L.getObjCLifetime() == R.getObjCLifetime()) {
    Q.setObjCLifetime(L.getObjCLifetime());
    L.removeObjCLifetime();
    R.removeObjCLifetime();
  }

  if (L.getAddressSpace() == R.getAddressSpace()) {
    Q.setAddressSpace(L.getAddressSpace());
    L.removeAddressSpace();
    R.removeAddressSpace();
  }
  return Q;
}

static Qualifiers fromFastMask(unsigned Mask) {
  Qualifiers Qs;
  Qs.addFastQualifiers(Mask);
  return Qs;
}

static Qualifiers fromCVRMask(unsigned CVR) {
  Qualifiers Qs;
  Qs.addCVRQualifiers(CVR);
  return Qs;
}

static Qualifiers fromCVRUMask(unsigned CVRU) {
  Qualifiers Qs;
  Qs.addCVRUQualifiers(CVRU);
  return Qs;
}

// Deserialize qualifiers from an opaque representation.
static Qualifiers fromOpaqueValue(unsigned opaque) {
  Qualifiers Qs;
  Qs.Mask = opaque;
  return Qs;
}

// Serialize these qualifiers into an opaque representation.
unsigned getAsOpaqueValue() const {
  return Mask;
}

bool hasConst() const { return Mask & Const; }
bool hasOnlyConst() const { return Mask == Const; }
void removeConst() { Mask &= ~Const; }
void addConst() { Mask |= Const; }

bool hasVolatile() const { return Mask & Volatile; }
bool hasOnlyVolatile() const { return Mask == Volatile; }
void removeVolatile() { Mask &= ~Volatile; }
void addVolatile() { Mask |= Volatile; }

bool hasRestrict() const { return Mask & Restrict; }
bool hasOnlyRestrict() const { return Mask == Restrict; }
void removeRestrict() { Mask &= ~Restrict; }
void addRestrict() { Mask |= Restrict; }

bool hasCVRQualifiers() const { return getCVRQualifiers(); }
unsigned getCVRQualifiers() const { return Mask & CVRMask; }
unsigned getCVRUQualifiers() const { return Mask & (CVRMask | UMask); }

void setCVRQualifiers(unsigned mask) {
  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((void)0);
  Mask = (Mask & ~CVRMask) | mask;
}
void removeCVRQualifiers(unsigned mask) {
  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((void)0);
  Mask &= ~mask;
}
void removeCVRQualifiers() {
  removeCVRQualifiers(CVRMask);
}
void addCVRQualifiers(unsigned mask) {
  assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((void)0);
  Mask |= mask;
}
void addCVRUQualifiers(unsigned mask) {
  assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits")((void)0);
  Mask |= mask;
}

bool hasUnaligned() const { return Mask & UMask; }
void setUnaligned(bool flag) {
  Mask = (Mask & ~UMask) | (flag ? UMask : 0);
}
void removeUnaligned() { Mask &= ~UMask; }
void addUnaligned() { Mask |= UMask; }

bool hasObjCGCAttr() const { return Mask & GCAttrMask; }
GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); }
void setObjCGCAttr(GC type) {
  Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift);
}
void removeObjCGCAttr() { setObjCGCAttr(GCNone); }
void addObjCGCAttr(GC type) {
  assert(type)((void)0);
  setObjCGCAttr(type);
}
Qualifiers withoutObjCGCAttr() const {
  Qualifiers qs = *this;
  qs.removeObjCGCAttr();
  return qs;
}
Qualifiers withoutObjCLifetime() const {
  Qualifiers qs = *this;
  qs.removeObjCLifetime();
  return qs;
}
Qualifiers withoutAddressSpace() const {
  Qualifiers qs = *this;
  qs.removeAddressSpace();
  return qs;
}

bool hasObjCLifetime() const { return Mask & LifetimeMask; }
ObjCLifetime getObjCLifetime() const {
  return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift);
}
void setObjCLifetime(ObjCLifetime type) {
  Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift);
}
void removeObjCLifetime() { setObjCLifetime(OCL_None); }
void addObjCLifetime(ObjCLifetime type) {
  assert(type)((void)0);
  assert(!hasObjCLifetime())((void)0);
  Mask |= (type << LifetimeShift);
}

/// True if the lifetime is neither None or ExplicitNone.
bool hasNonTrivialObjCLifetime() const {
  ObjCLifetime lifetime = getObjCLifetime();
  return (lifetime > OCL_ExplicitNone);
}

/// True if the lifetime is either strong or weak.
bool hasStrongOrWeakObjCLifetime() const {
  ObjCLifetime lifetime = getObjCLifetime();
  return (lifetime == OCL_Strong || lifetime == OCL_Weak);
}

bool hasAddressSpace() const { return Mask & AddressSpaceMask; }
LangAS getAddressSpace() const {
  return static_cast<LangAS>(Mask >> AddressSpaceShift);
}
bool hasTargetSpecificAddressSpace() const {
  return isTargetAddressSpace(getAddressSpace());
}
/// Get the address space attribute value to be printed by diagnostics.
unsigned getAddressSpaceAttributePrintValue() const {
  auto Addr = getAddressSpace();
  // This function is not supposed to be used with language specific
  // address spaces. If that happens, the diagnostic message should consider
  // printing the QualType instead of the address space value.
  assert(Addr == LangAS::Default || hasTargetSpecificAddressSpace())((void)0);
  if (Addr != LangAS::Default)
    return toTargetAddressSpace(Addr);
  // TODO: The diagnostic messages where Addr may be 0 should be fixed
  // since it cannot differentiate the situation where 0 denotes the default
  // address space or user specified __attribute__((address_space(0))).
  return 0;
}
void setAddressSpace(LangAS space) {
  assert((unsigned)space <= MaxAddressSpace)((void)0);
  Mask = (Mask & ~AddressSpaceMask)
       | (((uint32_t) space) << AddressSpaceShift);
}
void removeAddressSpace() { setAddressSpace(LangAS::Default); }
void addAddressSpace(LangAS space) {
  assert(space != LangAS::Default)((void)0);
  setAddressSpace(space);
}

// Fast qualifiers are those that can be allocated directly
// on a QualType object.
bool hasFastQualifiers() const { return getFastQualifiers(); }
unsigned getFastQualifiers() const { return Mask & FastMask; }
void setFastQualifiers(unsigned mask) {
  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((void)0);
  Mask = (Mask & ~FastMask) | mask;
}
void removeFastQualifiers(unsigned mask) {
  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((void)0);
  Mask &= ~mask;
}
void removeFastQualifiers() {
  removeFastQualifiers(FastMask);
}
void addFastQualifiers(unsigned mask) {
  assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((void)0);
  Mask |= mask;
}

/// Return true if the set contains any qualifiers which require an ExtQuals
/// node to be allocated.
bool hasNonFastQualifiers() const { return Mask & ~FastMask; }
Qualifiers getNonFastQualifiers() const {
  Qualifiers Quals = *this;
  Quals.setFastQualifiers(0);
  return Quals;
}

/// Return true if the set contains any qualifiers.
bool hasQualifiers() const { return Mask; }
bool empty() const { return !Mask; }

/// Add the qualifiers from the given set to this set.
void addQualifiers(Qualifiers Q) {
  // If the other set doesn't have any non-boolean qualifiers, just
  // bit-or it in.
  if (!(Q.Mask & ~CVRMask))
    Mask |= Q.Mask;
  else {
    Mask |= (Q.Mask & CVRMask);
    if (Q.hasAddressSpace())
      addAddressSpace(Q.getAddressSpace());
    if (Q.hasObjCGCAttr())
      addObjCGCAttr(Q.getObjCGCAttr());
    if (Q.hasObjCLifetime())
      addObjCLifetime(Q.getObjCLifetime());
  }
}

/// Remove the qualifiers from the given set from this set.
void removeQualifiers(Qualifiers Q) {
  // If the other set doesn't have any non-boolean qualifiers, just
  // bit-and the inverse in.
  if (!(Q.Mask & ~CVRMask))
    Mask &= ~Q.Mask;
  else {
    Mask &= ~(Q.Mask & CVRMask);
    if (getObjCGCAttr() == Q.getObjCGCAttr())
      removeObjCGCAttr();
    if (getObjCLifetime() == Q.getObjCLifetime())
      removeObjCLifetime();
    if (getAddressSpace() == Q.getAddressSpace())
      removeAddressSpace();
  }
}

/// Add the qualifiers from the given set to this set, given that
/// they don't conflict.
void addConsistentQualifiers(Qualifiers qs) {
  assert(getAddressSpace() == qs.getAddressSpace() ||((void)0)
         !hasAddressSpace() || !qs.hasAddressSpace())((void)0);
  assert(getObjCGCAttr() == qs.getObjCGCAttr() ||((void)0)
         !hasObjCGCAttr() || !qs.hasObjCGCAttr())((void)0);
  assert(getObjCLifetime() == qs.getObjCLifetime() ||((void)0)
         !hasObjCLifetime() || !qs.hasObjCLifetime())((void)0);
  Mask |= qs.Mask;
}

/// Returns true if address space A is equal to or a superset of B.
/// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of
/// overlapping address spaces.
/// CL1.1 or CL1.2:
///   every address space is a superset of itself.
/// CL2.0 adds:
///   __generic is a superset of any address space except for __constant.
static bool isAddressSpaceSupersetOf(LangAS A, LangAS B) {
  // Address spaces must match exactly.
  return A == B ||
         // Otherwise in OpenCLC v2.0 s6.5.5: every address space except
         // for __constant can be used as __generic.
         (A == LangAS::opencl_generic && B != LangAS::opencl_constant) ||
         // We also define global_device and global_host address spaces,
         // to distinguish global pointers allocated on host from pointers
         // allocated on device, which are a subset of __global.
         (A == LangAS::opencl_global && (B == LangAS::opencl_global_device ||
                                         B == LangAS::opencl_global_host)) ||
         (A == LangAS::sycl_global && (B == LangAS::sycl_global_device ||
                                       B == LangAS::sycl_global_host)) ||
         // Consider pointer size address spaces to be equivalent to default.
         ((isPtrSizeAddressSpace(A) || A == LangAS::Default) &&
          (isPtrSizeAddressSpace(B) || B == LangAS::Default)) ||
         // Default is a superset of SYCL address spaces.
         (A == LangAS::Default &&
          (B == LangAS::sycl_private || B == LangAS::sycl_local ||
           B == LangAS::sycl_global || B == LangAS::sycl_global_device ||
           B == LangAS::sycl_global_host));
}

/// Returns true if the address space in these qualifiers is equal to or
/// a superset of the address space in the argument qualifiers.
bool isAddressSpaceSupersetOf(Qualifiers other) const {
  return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace());
}

/// Determines if these qualifiers compatibly include another set.
/// Generally this answers the question of whether an object with the other
/// qualifiers can be safely used as an object with these qualifiers.
bool compatiblyIncludes(Qualifiers other) const {
  return isAddressSpaceSupersetOf(other) &&
         // ObjC GC qualifiers can match, be added, or be removed, but can't
         // be changed.
         (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() ||
          !other.hasObjCGCAttr()) &&
         // ObjC lifetime qualifiers must match exactly.
         getObjCLifetime() == other.getObjCLifetime() &&
         // CVR qualifiers may subset.
         (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) &&
         // U qualifier may superset.
         (!other.hasUnaligned() || hasUnaligned());
}

/// Determines if these qualifiers compatibly include another set of
/// qualifiers from the narrow perspective of Objective-C ARC lifetime.
///
/// One set of Objective-C lifetime qualifiers compatibly includes the other
/// if the lifetime qualifiers match, or if both are non-__weak and the
/// including set also contains the 'const' qualifier, or both are non-__weak
/// and one is None (which can only happen in non-ARC modes).
bool compatiblyIncludesObjCLifetime(Qualifiers other) const {
  if (getObjCLifetime() == other.getObjCLifetime())
    return true;

  if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak)
    return false;

  if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None)
    return true;

  return hasConst();
}

/// Determine whether this set of qualifiers is a strict superset of
/// another set of qualifiers, not considering qualifier compatibility.
bool isStrictSupersetOf(Qualifiers Other) const;

bool operator==(Qualifiers Other) const { return Mask == Other.Mask; }
bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; }

explicit operator bool() const { return hasQualifiers(); }

Qualifiers &operator+=(Qualifiers R) {
  addQualifiers(R);
  return *this;
}

// Union two qualifier sets.  If an enumerated qualifier appears
// in both sets, use the one from the right.
friend Qualifiers operator+(Qualifiers L, Qualifiers R) {
  L += R;
  return L;
}

Qualifiers &operator-=(Qualifiers R) {
  removeQualifiers(R);
  return *this;
}

/// Compute the difference between two qualifier sets.
friend Qualifiers operator-(Qualifiers L, Qualifiers R) {
  L -= R;
  return L;
}

std::string getAsString() const;
std::string getAsString(const PrintingPolicy &Policy) const;

static std::string getAddrSpaceAsString(LangAS AS);

bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const;
void print(raw_ostream &OS, const PrintingPolicy &Policy,
           bool appendSpaceIfNonEmpty = false) const;

void Profile(llvm::FoldingSetNodeID &ID) const {
  ID.AddInteger(Mask);
}

589private:
// bits:     |0 1 2|3|4 .. 5|6  ..  8|9   ...   31|
//           |C R V|U|GCAttr|Lifetime|AddressSpace|
uint32_t Mask = 0;

static const uint32_t UMask = 0x8;
static const uint32_t UShift = 3;
static const uint32_t GCAttrMask = 0x30;
static const uint32_t GCAttrShift = 4;
static const uint32_t LifetimeMask = 0x1C0;
static const uint32_t LifetimeShift = 6;
static const uint32_t AddressSpaceMask =
    ~(CVRMask | UMask | GCAttrMask | LifetimeMask);
static const uint32_t AddressSpaceShift = 9;
603};

605/// A std::pair-like structure for storing a qualified type split
606/// into its local qualifiers and its locally-unqualified type.
607struct SplitQualType {
/// The locally-unqualified type.
const Type *Ty = nullptr;

/// The local qualifiers.
Qualifiers Quals;

SplitQualType() = default;
SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {}

SplitQualType getSingleStepDesugaredType() const; // end of this file

// Make std::tie work.
std::pair<const Type *,Qualifiers> asPair() const {
  return std::pair<const Type *, Qualifiers>(Ty, Quals);
}

friend bool operator==(SplitQualType a, SplitQualType b) {
  return a.Ty == b.Ty && a.Quals == b.Quals;
}
friend bool operator!=(SplitQualType a, SplitQualType b) {
  return a.Ty != b.Ty || a.Quals != b.Quals;
}
630};

632/// The kind of type we are substituting Objective-C type arguments into.
633///
634/// The kind of substitution affects the replacement of type parameters when
635/// no concrete type information is provided, e.g., when dealing with an
636/// unspecialized type.
637enum class ObjCSubstitutionContext {
/// An ordinary type.
Ordinary,

/// The result type of a method or function.
Result,

/// The parameter type of a method or function.
Parameter,

/// The type of a property.
Property,

/// The superclass of a type.
Superclass,
652};

654/// A (possibly-)qualified type.
655///
656/// For efficiency, we don't store CV-qualified types as nodes on their
657/// own: instead each reference to a type stores the qualifiers.  This
658/// greatly reduces the number of nodes we need to allocate for types (for
659/// example we only need one for 'int', 'const int', 'volatile int',
660/// 'const volatile int', etc).
661///
662/// As an added efficiency bonus, instead of making this a pair, we
663/// just store the two bits we care about in the low bits of the
664/// pointer.  To handle the packing/unpacking, we make QualType be a
665/// simple wrapper class that acts like a smart pointer.  A third bit
666/// indicates whether there are extended qualifiers present, in which
667/// case the pointer points to a special structure.
668class QualType {
friend class QualifierCollector;

// Thankfully, these are efficiently composable.
llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>,
                     Qualifiers::FastWidth> Value;

const ExtQuals *getExtQualsUnsafe() const {
  return Value.getPointer().get<const ExtQuals*>();
}

const Type *getTypePtrUnsafe() const {
  return Value.getPointer().get<const Type*>();
}

const ExtQualsTypeCommonBase *getCommonPtr() const {
  assert(!isNull() && "Cannot retrieve a NULL type pointer")((void)0);
  auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue());
  CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1);
  return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal);
}

690public:
QualType() = default;
QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {}
QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {}

unsigned getLocalFastQualifiers() const { return Value.getInt(); }
void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); }

/// Retrieves a pointer to the underlying (unqualified) type.
///
/// This function requires that the type not be NULL. If the type might be
/// NULL, use the (slightly less efficient) \c getTypePtrOrNull().
const Type *getTypePtr() const;

const Type *getTypePtrOrNull() const;

/// Retrieves a pointer to the name of the base type.
const IdentifierInfo *getBaseTypeIdentifier() const;

/// Divides a QualType into its unqualified type and a set of local
/// qualifiers.
SplitQualType split() const;

void *getAsOpaquePtr() const { return Value.getOpaqueValue(); }

static QualType getFromOpaquePtr(const void *Ptr) {
  QualType T;
  T.Value.setFromOpaqueValue(const_cast<void*>(Ptr));
  return T;
}

const Type &operator*() const {
  return *getTypePtr();
}

const Type *operator->() const {
  return getTypePtr();
}

bool isCanonical() const;
bool isCanonicalAsParam() const;

/// Return true if this QualType doesn't point to a type yet.
bool isNull() const {
  return Value.getPointer().isNull();
}

/// Determine whether this particular QualType instance has the
/// "const" qualifier set, without looking through typedefs that may have
/// added "const" at a different level.
bool isLocalConstQualified() const {
  return (getLocalFastQualifiers() & Qualifiers::Const);
}

/// Determine whether this type is const-qualified.
bool isConstQualified() const;

/// Determine whether this particular QualType instance has the
/// "restrict" qualifier set, without looking through typedefs that may have
/// added "restrict" at a different level.
bool isLocalRestrictQualified() const {
  return (getLocalFastQualifiers() & Qualifiers::Restrict);
}

/// Determine whether this type is restrict-qualified.
bool isRestrictQualified() const;

/// Determine whether this particular QualType instance has the
/// "volatile" qualifier set, without looking through typedefs that may have
/// added "volatile" at a different level.
bool isLocalVolatileQualified() const {
  return (getLocalFastQualifiers() & Qualifiers::Volatile);
}

/// Determine whether this type is volatile-qualified.
bool isVolatileQualified() const;

/// Determine whether this particular QualType instance has any
/// qualifiers, without looking through any typedefs that might add
/// qualifiers at a different level.
bool hasLocalQualifiers() const {
  return getLocalFastQualifiers() || hasLocalNonFastQualifiers();
}

/// Determine whether this type has any qualifiers.
bool hasQualifiers() const;

/// Determine whether this particular QualType instance has any
/// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType
/// instance.
bool hasLocalNonFastQualifiers() const {
  return Value.getPointer().is<const ExtQuals*>();
}

/// Retrieve the set of qualifiers local to this particular QualType
/// instance, not including any qualifiers acquired through typedefs or
/// other sugar.
Qualifiers getLocalQualifiers() const;

/// Retrieve the set of qualifiers applied to this type.
Qualifiers getQualifiers() const;

/// Retrieve the set of CVR (const-volatile-restrict) qualifiers
/// local to this particular QualType instance, not including any qualifiers
/// acquired through typedefs or other sugar.
unsigned getLocalCVRQualifiers() const {
  return getLocalFastQualifiers();
}

/// Retrieve the set of CVR (const-volatile-restrict) qualifiers
/// applied to this type.
unsigned getCVRQualifiers() const;

bool isConstant(const ASTContext& Ctx) const {
  return QualType::isConstant(*this, Ctx);
}

/// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10).
bool isPODType(const ASTContext &Context) const;

/// Return true if this is a POD type according to the rules of the C++98
/// standard, regardless of the current compilation's language.
bool isCXX98PODType(const ASTContext &Context) const;

/// Return true if this is a POD type according to the more relaxed rules
/// of the C++11 standard, regardless of the current compilation's language.
/// (C++0x [basic.types]p9). Note that, unlike
/// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account.
bool isCXX11PODType(const ASTContext &Context) const;

/// Return true if this is a trivial type per (C++0x [basic.types]p9)
bool isTrivialType(const ASTContext &Context) const;

/// Return true if this is a trivially copyable type (C++0x [basic.types]p9)
bool isTriviallyCopyableType(const ASTContext &Context) const;


/// Returns true if it is a class and it might be dynamic.
bool mayBeDynamicClass() const;

/// Returns true if it is not a class or if the class might not be dynamic.
bool mayBeNotDynamicClass() const;

// Don't promise in the API that anything besides 'const' can be
// easily added.

/// Add the `const` type qualifier to this QualType.
void addConst() {
  addFastQualifiers(Qualifiers::Const);
}
QualType withConst() const {
  return withFastQualifiers(Qualifiers::Const);
}

/// Add the `volatile` type qualifier to this QualType.
void addVolatile() {
  addFastQualifiers(Qualifiers::Volatile);
}
QualType withVolatile() const {
  return withFastQualifiers(Qualifiers::Volatile);
}

/// Add the `restrict` qualifier to this QualType.
void addRestrict() {
  addFastQualifiers(Qualifiers::Restrict);
}
QualType withRestrict() const {
  return withFastQualifiers(Qualifiers::Restrict);
}

QualType withCVRQualifiers(unsigned CVR) const {
  return withFastQualifiers(CVR);
}

void addFastQualifiers(unsigned TQs) {
  assert(!(TQs & ~Qualifiers::FastMask)((void)0)
         && "non-fast qualifier bits set in mask!")((void)0);
  Value.setInt(Value.getInt() | TQs);
}

void removeLocalConst();
void removeLocalVolatile();
void removeLocalRestrict();
void removeLocalCVRQualifiers(unsigned Mask);

void removeLocalFastQualifiers() { Value.setInt(0); }
void removeLocalFastQualifiers(unsigned Mask) {
  assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers")((void)0);
  Value.setInt(Value.getInt() & ~Mask);
}

// Creates a type with the given qualifiers in addition to any
// qualifiers already on this type.
QualType withFastQualifiers(unsigned TQs) const {
  QualType T = *this;
  T.addFastQualifiers(TQs);
  return T;
}

// Creates a type with exactly the given fast qualifiers, removing
// any existing fast qualifiers.
QualType withExactLocalFastQualifiers(unsigned TQs) const {
  return withoutLocalFastQualifiers().withFastQualifiers(TQs);
}

// Removes fast qualifiers, but leaves any extended qualifiers in place.
QualType withoutLocalFastQualifiers() const {
  QualType T = *this;
  T.removeLocalFastQualifiers();
  return T;
}

QualType getCanonicalType() const;

/// Return this type with all of the instance-specific qualifiers
/// removed, but without removing any qualifiers that may have been applied
/// through typedefs.
QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); }

/// Retrieve the unqualified variant of the given type,
/// removing as little sugar as possible.
///
/// This routine looks through various kinds of sugar to find the
/// least-desugared type that is unqualified. For example, given:
///
/// \code
/// typedef int Integer;
/// typedef const Integer CInteger;
/// typedef CInteger DifferenceType;
/// \endcode
///
/// Executing \c getUnqualifiedType() on the type \c DifferenceType will
/// desugar until we hit the type \c Integer, which has no qualifiers on it.
///
/// The resulting type might still be qualified if it's sugar for an array
/// type.  To strip qualifiers even from within a sugared array type, use
/// ASTContext::getUnqualifiedArrayType.
inline QualType getUnqualifiedType() const;

/// Retrieve the unqualified variant of the given type, removing as little
/// sugar as possible.
///
/// Like getUnqualifiedType(), but also returns the set of
/// qualifiers that were built up.
///
/// The resulting type might still be qualified if it's sugar for an array
/// type.  To strip qualifiers even from within a sugared array type, use
/// ASTContext::getUnqualifiedArrayType.
inline SplitQualType getSplitUnqualifiedType() const;

/// Determine whether this type is more qualified than the other
/// given type, requiring exact equality for non-CVR qualifiers.
bool isMoreQualifiedThan(QualType Other) const;

/// Determine whether this type is at least as qualified as the other
/// given type, requiring exact equality for non-CVR qualifiers.
bool isAtLeastAsQualifiedAs(QualType Other) const;

QualType getNonReferenceType() const;

/// Determine the type of a (typically non-lvalue) expression with the
/// specified result type.
///
/// This routine should be used for expressions for which the return type is
/// explicitly specified (e.g., in a cast or call) and isn't necessarily
/// an lvalue. It removes a top-level reference (since there are no
/// expressions of reference type) and deletes top-level cvr-qualifiers
/// from non-class types (in C++) or all types (in C).
QualType getNonLValueExprType(const ASTContext &Context) const;

/// Remove an outer pack expansion type (if any) from this type. Used as part
/// of converting the type of a declaration to the type of an expression that
/// references that expression. It's meaningless for an expression to have a
/// pack expansion type.
QualType getNonPackExpansionType() const;

/// Return the specified type with any "sugar" removed from
/// the type.  This takes off typedefs, typeof's etc.  If the outer level of
/// the type is already concrete, it returns it unmodified.  This is similar
/// to getting the canonical type, but it doesn't remove *all* typedefs.  For
/// example, it returns "T*" as "T*", (not as "int*"), because the pointer is
/// concrete.
///
/// Qualifiers are left in place.
QualType getDesugaredType(const ASTContext &Context) const {
  return getDesugaredType(*this, Context);
}

SplitQualType getSplitDesugaredType() const {
  return getSplitDesugaredType(*this);
}

/// Return the specified type with one level of "sugar" removed from
/// the type.
///
/// This routine takes off the first typedef, typeof, etc. If the outer level
/// of the type is already concrete, it returns it unmodified.
QualType getSingleStepDesugaredType(const ASTContext &Context) const {
  return getSingleStepDesugaredTypeImpl(*this, Context);
}

/// Returns the specified type after dropping any
/// outer-level parentheses.
QualType IgnoreParens() const {
  if (isa<ParenType>(*this))
    return QualType::IgnoreParens(*this);
  return *this;
}

/// Indicate whether the specified types and qualifiers are identical.
friend bool operator==(const QualType &LHS, const QualType &RHS) {
  return LHS.Value == RHS.Value;
}
friend bool operator!=(const QualType &LHS, const QualType &RHS) {
  return LHS.Value != RHS.Value;
}
friend bool operator<(const QualType &LHS, const QualType &RHS) {
  return LHS.Value < RHS.Value;
}

static std::string getAsString(SplitQualType split,
                               const PrintingPolicy &Policy) {
  return getAsString(split.Ty, split.Quals, Policy);
}
static std::string getAsString(const Type *ty, Qualifiers qs,
                               const PrintingPolicy &Policy);

std::string getAsString() const;
std::string getAsString(const PrintingPolicy &Policy) const;

void print(raw_ostream &OS, const PrintingPolicy &Policy,
           const Twine &PlaceHolder = Twine(),
           unsigned Indentation = 0) const;

static void print(SplitQualType split, raw_ostream &OS,
                  const PrintingPolicy &policy, const Twine &PlaceHolder,
                  unsigned Indentation = 0) {
  return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation);
}

static void print(const Type *ty, Qualifiers qs,
                  raw_ostream &OS, const PrintingPolicy &policy,
                  const Twine &PlaceHolder,
                  unsigned Indentation = 0);

void getAsStringInternal(std::string &Str,
                         const PrintingPolicy &Policy) const;

static void getAsStringInternal(SplitQualType split, std::string &out,
                                const PrintingPolicy &policy) {
  return getAsStringInternal(split.Ty, split.Quals, out, policy);
}

static void getAsStringInternal(const Type *ty, Qualifiers qs,
                                std::string &out,
                                const PrintingPolicy &policy);

class StreamedQualTypeHelper {
  const QualType &T;
  const PrintingPolicy &Policy;
  const Twine &PlaceHolder;
  unsigned Indentation;

public:
  StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy,
                         const Twine &PlaceHolder, unsigned Indentation)
      : T(T), Policy(Policy), PlaceHolder(PlaceHolder),
        Indentation(Indentation) {}

  friend raw_ostream &operator<<(raw_ostream &OS,
                                 const StreamedQualTypeHelper &SQT) {
    SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation);
    return OS;
  }
};

StreamedQualTypeHelper stream(const PrintingPolicy &Policy,
                              const Twine &PlaceHolder = Twine(),
                              unsigned Indentation = 0) const {
  return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation);
}

void dump(const char *s) const;
void dump() const;
void dump(llvm::raw_ostream &OS, const ASTContext &Context) const;

void Profile(llvm::FoldingSetNodeID &ID) const {
  ID.AddPointer(getAsOpaquePtr());
}

/// Check if this type has any address space qualifier.
inline bool hasAddressSpace() const;

/// Return the address space of this type.
inline LangAS getAddressSpace() const;

/// Returns true if address space qualifiers overlap with T address space
/// qualifiers.
/// OpenCL C defines conversion rules for pointers to different address spaces
/// and notion of overlapping address spaces.
/// CL1.1 or CL1.2:
///   address spaces overlap iff they are they same.
/// OpenCL C v2.0 s6.5.5 adds:
///   __generic overlaps with any address space except for __constant.
bool isAddressSpaceOverlapping(QualType T) const {
  Qualifiers Q = getQualifiers();
  Qualifiers TQ = T.getQualifiers();
  // Address spaces overlap if at least one of them is a superset of another
  return Q.isAddressSpaceSupersetOf(TQ) || TQ.isAddressSpaceSupersetOf(Q);
}

/// Returns gc attribute of this type.
inline Qualifiers::GC getObjCGCAttr() const;

/// true when Type is objc's weak.
bool isObjCGCWeak() const {
  return getObjCGCAttr() == Qualifiers::Weak;
}

/// true when Type is objc's strong.
bool isObjCGCStrong() const {
  return getObjCGCAttr() == Qualifiers::Strong;
}

/// Returns lifetime attribute of this type.
Qualifiers::ObjCLifetime getObjCLifetime() const {
  return getQualifiers().getObjCLifetime();
}

bool hasNonTrivialObjCLifetime() const {
  return getQualifiers().hasNonTrivialObjCLifetime();
}

bool hasStrongOrWeakObjCLifetime() const {
  return getQualifiers().hasStrongOrWeakObjCLifetime();
}

// true when Type is objc's weak and weak is enabled but ARC isn't.
bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const;

enum PrimitiveDefaultInitializeKind {
  /// The type does not fall into any of the following categories. Note that
  /// this case is zero-valued so that values of this enum can be used as a
  /// boolean condition for non-triviality.
  PDIK_Trivial,

  /// The type is an Objective-C retainable pointer type that is qualified
  /// with the ARC __strong qualifier.
  PDIK_ARCStrong,

  /// The type is an Objective-C retainable pointer type that is qualified
  /// with the ARC __weak qualifier.
  PDIK_ARCWeak,

  /// The type is a struct containing a field whose type is not PCK_Trivial.
  PDIK_Struct
};

/// Functions to query basic properties of non-trivial C struct types.

/// Check if this is a non-trivial type that would cause a C struct
/// transitively containing this type to be non-trivial to default initialize
/// and return the kind.
PrimitiveDefaultInitializeKind
isNonTrivialToPrimitiveDefaultInitialize() const;

enum PrimitiveCopyKind {
  /// The type does not fall into any of the following categories. Note that
  /// this case is zero-valued so that values of this enum can be used as a
  /// boolean condition for non-triviality.
  PCK_Trivial,

  /// The type would be trivial except that it is volatile-qualified. Types
  /// that fall into one of the other non-trivial cases may additionally be
  /// volatile-qualified.
  PCK_VolatileTrivial,

  /// The type is an Objective-C retainable pointer type that is qualified
  /// with the ARC __strong qualifier.
  PCK_ARCStrong,

  /// The type is an Objective-C retainable pointer type that is qualified
  /// with the ARC __weak qualifier.
  PCK_ARCWeak,

  /// The type is a struct containing a field whose type is neither
  /// PCK_Trivial nor PCK_VolatileTrivial.
  /// Note that a C++ struct type does not necessarily match this; C++ copying
  /// semantics are too complex to express here, in part because they depend
  /// on the exact constructor or assignment operator that is chosen by
  /// overload resolution to do the copy.
  PCK_Struct
};

/// Check if this is a non-trivial type that would cause a C struct
/// transitively containing this type to be non-trivial to copy and return the
/// kind.
PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const;

/// Check if this is a non-trivial type that would cause a C struct
/// transitively containing this type to be non-trivial to destructively
/// move and return the kind. Destructive move in this context is a C++-style
/// move in which the source object is placed in a valid but unspecified state
/// after it is moved, as opposed to a truly destructive move in which the
/// source object is placed in an uninitialized state.
PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const;

enum DestructionKind {
  DK_none,
  DK_cxx_destructor,
  DK_objc_strong_lifetime,
  DK_objc_weak_lifetime,
  DK_nontrivial_c_struct
};

/// Returns a nonzero value if objects of this type require
/// non-trivial work to clean up after.  Non-zero because it's
/// conceivable that qualifiers (objc_gc(weak)?) could make
/// something require destruction.
DestructionKind isDestructedType() const {
  return isDestructedTypeImpl(*this);
}

/// Check if this is or contains a C union that is non-trivial to
/// default-initialize, which is a union that has a member that is non-trivial
/// to default-initialize. If this returns true,
/// isNonTrivialToPrimitiveDefaultInitialize returns PDIK_Struct.
bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const;

/// Check if this is or contains a C union that is non-trivial to destruct,
/// which is a union that has a member that is non-trivial to destruct. If
/// this returns true, isDestructedType returns DK_nontrivial_c_struct.
bool hasNonTrivialToPrimitiveDestructCUnion() const;

/// Check if this is or contains a C union that is non-trivial to copy, which
/// is a union that has a member that is non-trivial to copy. If this returns
/// true, isNonTrivialToPrimitiveCopy returns PCK_Struct.
bool hasNonTrivialToPrimitiveCopyCUnion() const;

/// Determine whether expressions of the given type are forbidden
/// from being lvalues in C.
///
/// The expression types that are forbidden to be lvalues are:
///   - 'void', but not qualified void
///   - function types
///
/// The exact rule here is C99 6.3.2.1:
///   An lvalue is an expression with an object type or an incomplete
///   type other than void.
bool isCForbiddenLValueType() const;

/// Substitute type arguments for the Objective-C type parameters used in the
/// subject type.
///
/// \param ctx ASTContext in which the type exists.
///
/// \param typeArgs The type arguments that will be substituted for the
/// Objective-C type parameters in the subject type, which are generally
/// computed via \c Type::getObjCSubstitutions. If empty, the type
/// parameters will be replaced with their bounds or id/Class, as appropriate
/// for the context.
///
/// \param context The context in which the subject type was written.
///
/// \returns the resulting type.
QualType substObjCTypeArgs(ASTContext &ctx,
                           ArrayRef<QualType> typeArgs,
                           ObjCSubstitutionContext context) const;

/// Substitute type arguments from an object type for the Objective-C type
/// parameters used in the subject type.
///
/// This operation combines the computation of type arguments for
/// substitution (\c Type::getObjCSubstitutions) with the actual process of
/// substitution (\c QualType::substObjCTypeArgs) for the convenience of
/// callers that need to perform a single substitution in isolation.
///
/// \param objectType The type of the object whose member type we're
/// substituting into. For example, this might be the receiver of a message
/// or the base of a property access.
///
/// \param dc The declaration context from which the subject type was
/// retrieved, which indicates (for example) which type parameters should
/// be substituted.
///
/// \param context The context in which the subject type was written.
///
/// \returns the subject type after replacing all of the Objective-C type
/// parameters with their corresponding arguments.
QualType substObjCMemberType(QualType objectType,
                             const DeclContext *dc,
                             ObjCSubstitutionContext context) const;

/// Strip Objective-C "__kindof" types from the given type.
QualType stripObjCKindOfType(const ASTContext &ctx) const;

/// Remove all qualifiers including _Atomic.
QualType getAtomicUnqualifiedType() const;

1289private:
// These methods are implemented in a separate translation unit;
// "static"-ize them to avoid creating temporary QualTypes in the
// caller.
static bool isConstant(QualType T, const ASTContext& Ctx);
static QualType getDesugaredType(QualType T, const ASTContext &Context);
static SplitQualType getSplitDesugaredType(QualType T);
static SplitQualType getSplitUnqualifiedTypeImpl(QualType type);
static QualType getSingleStepDesugaredTypeImpl(QualType type,
                                               const ASTContext &C);
static QualType IgnoreParens(QualType T);
static DestructionKind isDestructedTypeImpl(QualType type);

/// Check if \param RD is or contains a non-trivial C union.
static bool hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD);
static bool hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD);
static bool hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD);
1306};

1308} // namespace clang

1310namespace llvm {

1312/// Implement simplify_type for QualType, so that we can dyn_cast from QualType
1313/// to a specific Type class.
1314template<> struct simplify_type< ::clang::QualType> {
using SimpleType = const ::clang::Type *;

static SimpleType getSimplifiedValue(::clang::QualType Val) {
  return Val.getTypePtr();
}
1320};

1322// Teach SmallPtrSet that QualType is "basically a pointer".
1323template<>
1324struct PointerLikeTypeTraits<clang::QualType> {
static inline void *getAsVoidPointer(clang::QualType P) {
  return P.getAsOpaquePtr();
}

static inline clang::QualType getFromVoidPointer(void *P) {
  return clang::QualType::getFromOpaquePtr(P);
}

// Various qualifiers go in low bits.
static constexpr int NumLowBitsAvailable = 0;
1335};

1337} // namespace llvm

1339namespace clang {

1341/// Base class that is common to both the \c ExtQuals and \c Type
1342/// classes, which allows \c QualType to access the common fields between the
1343/// two.
1344class ExtQualsTypeCommonBase {
friend class ExtQuals;
friend class QualType;
friend class Type;

/// The "base" type of an extended qualifiers type (\c ExtQuals) or
/// a self-referential pointer (for \c Type).
///
/// This pointer allows an efficient mapping from a QualType to its
/// underlying type pointer.
const Type *const BaseType;

/// The canonical type of this type.  A QualType.
QualType CanonicalType;

ExtQualsTypeCommonBase(const Type *baseType, QualType canon)
    : BaseType(baseType), CanonicalType(canon) {}
1361};

1363/// We can encode up to four bits in the low bits of a
1364/// type pointer, but there are many more type qualifiers that we want
1365/// to be able to apply to an arbitrary type.  Therefore we have this
1366/// struct, intended to be heap-allocated and used by QualType to
1367/// store qualifiers.
1368///
1369/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers
1370/// in three low bits on the QualType pointer; a fourth bit records whether
1371/// the pointer is an ExtQuals node. The extended qualifiers (address spaces,
1372/// Objective-C GC attributes) are much more rare.
1373class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode {
// NOTE: changing the fast qualifiers should be straightforward as
// long as you don't make 'const' non-fast.
// 1. Qualifiers:
//    a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ).
//       Fast qualifiers must occupy the low-order bits.
//    b) Update Qualifiers::FastWidth and FastMask.
// 2. QualType:
//    a) Update is{Volatile,Restrict}Qualified(), defined inline.
//    b) Update remove{Volatile,Restrict}, defined near the end of
//       this header.
// 3. ASTContext:
//    a) Update get{Volatile,Restrict}Type.

/// The immutable set of qualifiers applied by this node. Always contains
/// extended qualifiers.
Qualifiers Quals;

ExtQuals *this_() { return this; }

1393public:
ExtQuals(const Type *baseType, QualType canon, Qualifiers quals)
    : ExtQualsTypeCommonBase(baseType,
                             canon.isNull() ? QualType(this_(), 0) : canon),
      Quals(quals) {
  assert(Quals.hasNonFastQualifiers()((void)0)
         && "ExtQuals created with no fast qualifiers")((void)0);
  assert(!Quals.hasFastQualifiers()((void)0)
         && "ExtQuals created with fast qualifiers")((void)0);
}

Qualifiers getQualifiers() const { return Quals; }

bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); }
Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); }

bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); }
Qualifiers::ObjCLifetime getObjCLifetime() const {
  return Quals.getObjCLifetime();
}

bool hasAddressSpace() const { return Quals.hasAddressSpace(); }
LangAS getAddressSpace() const { return Quals.getAddressSpace(); }

const Type *getBaseType() const { return BaseType; }

1419public:
void Profile(llvm::FoldingSetNodeID &ID) const {
  Profile(ID, getBaseType(), Quals);
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    const Type *BaseType,
                    Qualifiers Quals) {
  assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!")((void)0);
  ID.AddPointer(BaseType);
  Quals.Profile(ID);
}
1431};

1433/// The kind of C++11 ref-qualifier associated with a function type.
1434/// This determines whether a member function's "this" object can be an
1435/// lvalue, rvalue, or neither.
1436enum RefQualifierKind {
/// No ref-qualifier was provided.
RQ_None = 0,

/// An lvalue ref-qualifier was provided (\c &).
RQ_LValue,

/// An rvalue ref-qualifier was provided (\c &&).
RQ_RValue
1445};

1447/// Which keyword(s) were used to create an AutoType.
1448enum class AutoTypeKeyword {
/// auto
Auto,

/// decltype(auto)
DecltypeAuto,

/// __auto_type (GNU extension)
GNUAutoType
1457};

1459/// The base class of the type hierarchy.
1460///
1461/// A central concept with types is that each type always has a canonical
1462/// type.  A canonical type is the type with any typedef names stripped out
1463/// of it or the types it references.  For example, consider:
1464///
1465///  typedef int  foo;
1466///  typedef foo* bar;
1467///    'int *'    'foo *'    'bar'
1468///
1469/// There will be a Type object created for 'int'.  Since int is canonical, its
1470/// CanonicalType pointer points to itself.  There is also a Type for 'foo' (a
1471/// TypedefType).  Its CanonicalType pointer points to the 'int' Type.  Next
1472/// there is a PointerType that represents 'int*', which, like 'int', is
1473/// canonical.  Finally, there is a PointerType type for 'foo*' whose canonical
1474/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type
1475/// is also 'int*'.
1476///
1477/// Non-canonical types are useful for emitting diagnostics, without losing
1478/// information about typedefs being used.  Canonical types are useful for type
1479/// comparisons (they allow by-pointer equality tests) and useful for reasoning
1480/// about whether something has a particular form (e.g. is a function type),
1481/// because they implicitly, recursively, strip all typedefs out of a type.
1482///
1483/// Types, once created, are immutable.
1484///
1485class alignas(8) Type : public ExtQualsTypeCommonBase {
1486public:
enum TypeClass {
1488#define TYPE(Class, Base) Class,
1489#define LAST_TYPE(Class) TypeLast = Class
1490#define ABSTRACT_TYPE(Class, Base)
1491#include "clang/AST/TypeNodes.inc"
};

1494private:
/// Bitfields required by the Type class.
class TypeBitfields {
  friend class Type;
  template <class T> friend class TypePropertyCache;

  /// TypeClass bitfield - Enum that specifies what subclass this belongs to.
  unsigned TC : 8;

  /// Store information on the type dependency.
  unsigned Dependence : llvm::BitWidth<TypeDependence>;

  /// True if the cache (i.e. the bitfields here starting with
  /// 'Cache') is valid.
  mutable unsigned CacheValid : 1;

  /// Linkage of this type.
  mutable unsigned CachedLinkage : 3;

  /// Whether this type involves and local or unnamed types.
  mutable unsigned CachedLocalOrUnnamed : 1;

  /// Whether this type comes from an AST file.
  mutable unsigned FromAST : 1;

  bool isCacheValid() const {
    return CacheValid;
  }

  Linkage getLinkage() const {
    assert(isCacheValid() && "getting linkage from invalid cache")((void)0);
    return static_cast<Linkage>(CachedLinkage);
  }

  bool hasLocalOrUnnamedType() const {
    assert(isCacheValid() && "getting linkage from invalid cache")((void)0);
    return CachedLocalOrUnnamed;
  }
};
enum { NumTypeBits = 8 + llvm::BitWidth<TypeDependence> + 6 };

1535protected:
// These classes allow subclasses to somewhat cleanly pack bitfields
// into Type.

class ArrayTypeBitfields {
  friend class ArrayType;

  unsigned : NumTypeBits;

  /// CVR qualifiers from declarations like
  /// 'int X[static restrict 4]'. For function parameters only.
  unsigned IndexTypeQuals : 3;

  /// Storage class qualifiers from declarations like
  /// 'int X[static restrict 4]'. For function parameters only.
  /// Actually an ArrayType::ArraySizeModifier.
  unsigned SizeModifier : 3;
};

class ConstantArrayTypeBitfields {
  friend class ConstantArrayType;

  unsigned : NumTypeBits + 3 + 3;

  /// Whether we have a stored size expression.
  unsigned HasStoredSizeExpr : 1;
};

class BuiltinTypeBitfields {
  friend class BuiltinType;

  unsigned : NumTypeBits;

  /// The kind (BuiltinType::Kind) of builtin type this is.
  unsigned Kind : 8;
};

/// FunctionTypeBitfields store various bits belonging to FunctionProtoType.
/// Only common bits are stored here. Additional uncommon bits are stored
/// in a trailing object after FunctionProtoType.
class FunctionTypeBitfields {
  friend class FunctionProtoType;
  friend class FunctionType;

  unsigned : NumTypeBits;

  /// Extra information which affects how the function is called, like
  /// regparm and the calling convention.
  unsigned ExtInfo : 13;

  /// The ref-qualifier associated with a \c FunctionProtoType.
  ///
  /// This is a value of type \c RefQualifierKind.
  unsigned RefQualifier : 2;

  /// Used only by FunctionProtoType, put here to pack with the
  /// other bitfields.
  /// The qualifiers are part of FunctionProtoType because...
  ///
  /// C++ 8.3.5p4: The return type, the parameter type list and the
  /// cv-qualifier-seq, [...], are part of the function type.
  unsigned FastTypeQuals : Qualifiers::FastWidth;
  /// Whether this function has extended Qualifiers.
  unsigned HasExtQuals : 1;

  /// The number of parameters this function has, not counting '...'.
  /// According to [implimits] 8 bits should be enough here but this is
  /// somewhat easy to exceed with metaprogramming and so we would like to
  /// keep NumParams as wide as reasonably possible.
  unsigned NumParams : 16;

  /// The type of exception specification this function has.
  unsigned ExceptionSpecType : 4;

  /// Whether this function has extended parameter information.
  unsigned HasExtParameterInfos : 1;

  /// Whether the function is variadic.
  unsigned Variadic : 1;

  /// Whether this function has a trailing return type.
  unsigned HasTrailingReturn : 1;
};

class ObjCObjectTypeBitfields {
  friend class ObjCObjectType;

  unsigned : NumTypeBits;

  /// The number of type arguments stored directly on this object type.
  unsigned NumTypeArgs : 7;

  /// The number of protocols stored directly on this object type.
  unsigned NumProtocols : 6;

  /// Whether this is a "kindof" type.
  unsigned IsKindOf : 1;
};

class ReferenceTypeBitfields {
  friend class ReferenceType;

  unsigned : NumTypeBits;

  /// True if the type was originally spelled with an lvalue sigil.
  /// This is never true of rvalue references but can also be false
  /// on lvalue references because of C++0x [dcl.typedef]p9,
  /// as follows:
  ///
  ///   typedef int &ref;    // lvalue, spelled lvalue
  ///   typedef int &&rvref; // rvalue
  ///   ref &a;              // lvalue, inner ref, spelled lvalue
  ///   ref &&a;             // lvalue, inner ref
  ///   rvref &a;            // lvalue, inner ref, spelled lvalue
  ///   rvref &&a;           // rvalue, inner ref
  unsigned SpelledAsLValue : 1;

  /// True if the inner type is a reference type.  This only happens
  /// in non-canonical forms.
  unsigned InnerRef : 1;
};

class TypeWithKeywordBitfields {
  friend class TypeWithKeyword;

  unsigned : NumTypeBits;

  /// An ElaboratedTypeKeyword.  8 bits for efficient access.
  unsigned Keyword : 8;
};

enum { NumTypeWithKeywordBits = 8 };

class ElaboratedTypeBitfields {
  friend class ElaboratedType;

  unsigned : NumTypeBits;
  unsigned : NumTypeWithKeywordBits;

  /// Whether the ElaboratedType has a trailing OwnedTagDecl.
  unsigned HasOwnedTagDecl : 1;
};

class VectorTypeBitfields {
  friend class VectorType;
  friend class DependentVectorType;

  unsigned : NumTypeBits;

  /// The kind of vector, either a generic vector type or some
  /// target-specific vector type such as for AltiVec or Neon.
  unsigned VecKind : 3;
  /// The number of elements in the vector.
  uint32_t NumElements;
};

class AttributedTypeBitfields {
  friend class AttributedType;

  unsigned : NumTypeBits;

  /// An AttributedType::Kind
  unsigned AttrKind : 32 - NumTypeBits;
};

class AutoTypeBitfields {
  friend class AutoType;

  unsigned : NumTypeBits;

  /// Was this placeholder type spelled as 'auto', 'decltype(auto)',
  /// or '__auto_type'?  AutoTypeKeyword value.
  unsigned Keyword : 2;

  /// The number of template arguments in the type-constraints, which is
  /// expected to be able to hold at least 1024 according to [implimits].
  /// However as this limit is somewhat easy to hit with template
  /// metaprogramming we'd prefer to keep it as large as possible.
  /// At the moment it has been left as a non-bitfield since this type
  /// safely fits in 64 bits as an unsigned, so there is no reason to
  /// introduce the performance impact of a bitfield.
  unsigned NumArgs;
};

class SubstTemplateTypeParmPackTypeBitfields {
  friend class SubstTemplateTypeParmPackType;

  unsigned : NumTypeBits;

  /// The number of template arguments in \c Arguments, which is
  /// expected to be able to hold at least 1024 according to [implimits].
  /// However as this limit is somewhat easy to hit with template
  /// metaprogramming we'd prefer to keep it as large as possible.
  /// At the moment it has been left as a non-bitfield since this type
  /// safely fits in 64 bits as an unsigned, so there is no reason to
  /// introduce the performance impact of a bitfield.
  unsigned NumArgs;
};

class TemplateSpecializationTypeBitfields {
  friend class TemplateSpecializationType;

  unsigned : NumTypeBits;

  /// Whether this template specialization type is a substituted type alias.
  unsigned TypeAlias : 1;

  /// The number of template arguments named in this class template
  /// specialization, which is expected to be able to hold at least 1024
  /// according to [implimits]. However, as this limit is somewhat easy to
  /// hit with template metaprogramming we'd prefer to keep it as large
  /// as possible. At the moment it has been left as a non-bitfield since
  /// this type safely fits in 64 bits as an unsigned, so there is no reason
  /// to introduce the performance impact of a bitfield.
  unsigned NumArgs;
};

class DependentTemplateSpecializationTypeBitfields {
  friend class DependentTemplateSpecializationType;

  unsigned : NumTypeBits;
  unsigned : NumTypeWithKeywordBits;

  /// The number of template arguments named in this class template
  /// specialization, which is expected to be able to hold at least 1024
  /// according to [implimits]. However, as this limit is somewhat easy to
  /// hit with template metaprogramming we'd prefer to keep it as large
  /// as possible. At the moment it has been left as a non-bitfield since
  /// this type safely fits in 64 bits as an unsigned, so there is no reason
  /// to introduce the performance impact of a bitfield.
  unsigned NumArgs;
};

class PackExpansionTypeBitfields {
  friend class PackExpansionType;

  unsigned : NumTypeBits;

  /// The number of expansions that this pack expansion will
  /// generate when substituted (+1), which is expected to be able to
  /// hold at least 1024 according to [implimits]. However, as this limit
  /// is somewhat easy to hit with template metaprogramming we'd prefer to
  /// keep it as large as possible. At the moment it has been left as a
  /// non-bitfield since this type safely fits in 64 bits as an unsigned, so
  /// there is no reason to introduce the performance impact of a bitfield.
  ///
  /// This field will only have a non-zero value when some of the parameter
  /// packs that occur within the pattern have been substituted but others
  /// have not.
  unsigned NumExpansions;
};

union {
  TypeBitfields TypeBits;
  ArrayTypeBitfields ArrayTypeBits;
  ConstantArrayTypeBitfields ConstantArrayTypeBits;
  AttributedTypeBitfields AttributedTypeBits;
  AutoTypeBitfields AutoTypeBits;
  BuiltinTypeBitfields BuiltinTypeBits;
  FunctionTypeBitfields FunctionTypeBits;
  ObjCObjectTypeBitfields ObjCObjectTypeBits;
  ReferenceTypeBitfields ReferenceTypeBits;
  TypeWithKeywordBitfields TypeWithKeywordBits;
  ElaboratedTypeBitfields ElaboratedTypeBits;
  VectorTypeBitfields VectorTypeBits;
  SubstTemplateTypeParmPackTypeBitfields SubstTemplateTypeParmPackTypeBits;
  TemplateSpecializationTypeBitfields TemplateSpecializationTypeBits;
  DependentTemplateSpecializationTypeBitfields
    DependentTemplateSpecializationTypeBits;
  PackExpansionTypeBitfields PackExpansionTypeBits;
};

1807private:
template <class T> friend class TypePropertyCache;

/// Set whether this type comes from an AST file.
void setFromAST(bool V = true) const {
  TypeBits.FromAST = V;
}

1815protected:
friend class ASTContext;

Type(TypeClass tc, QualType canon, TypeDependence Dependence)
    : ExtQualsTypeCommonBase(this,
                             canon.isNull() ? QualType(this_(), 0) : canon) {
  static_assert(sizeof(*this) <= 8 + sizeof(ExtQualsTypeCommonBase),
                "changing bitfields changed sizeof(Type)!");
  static_assert(alignof(decltype(*this)) % sizeof(void *) == 0,
                "Insufficient alignment!");
  TypeBits.TC = tc;
  TypeBits.Dependence = static_cast<unsigned>(Dependence);
  TypeBits.CacheValid = false;
  TypeBits.CachedLocalOrUnnamed = false;
  TypeBits.CachedLinkage = NoLinkage;
  TypeBits.FromAST = false;
}

// silence VC++ warning C4355: 'this' : used in base member initializer list
Type *this_() { return this; }

void setDependence(TypeDependence D) {
  TypeBits.Dependence = static_cast<unsigned>(D);
}

void addDependence(TypeDependence D) { setDependence(getDependence() | D); }

1842public:
friend class ASTReader;
friend class ASTWriter;
template <class T> friend class serialization::AbstractTypeReader;
template <class T> friend class serialization::AbstractTypeWriter;

Type(const Type &) = delete;
Type(Type &&) = delete;
Type &operator=(const Type &) = delete;
Type &operator=(Type &&) = delete;

TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); }

/// Whether this type comes from an AST file.
bool isFromAST() const { return TypeBits.FromAST; }

/// Whether this type is or contains an unexpanded parameter
/// pack, used to support C++0x variadic templates.
///
/// A type that contains a parameter pack shall be expanded by the
/// ellipsis operator at some point. For example, the typedef in the
/// following example contains an unexpanded parameter pack 'T':
///
/// \code
/// template<typename ...T>
/// struct X {
///   typedef T* pointer_types; // ill-formed; T is a parameter pack.
/// };
/// \endcode
///
/// Note that this routine does not specify which
bool containsUnexpandedParameterPack() const {
  return getDependence() & TypeDependence::UnexpandedPack;
}

/// Determines if this type would be canonical if it had no further
/// qualification.
bool isCanonicalUnqualified() const {
  return CanonicalType == QualType(this, 0);
}

/// Pull a single level of sugar off of this locally-unqualified type.
/// Users should generally prefer SplitQualType::getSingleStepDesugaredType()
/// or QualType::getSingleStepDesugaredType(const ASTContext&).
QualType getLocallyUnqualifiedSingleStepDesugaredType() const;

/// As an extension, we classify types as one of "sized" or "sizeless";
/// every type is one or the other.  Standard types are all sized;
/// sizeless types are purely an extension.
///
/// Sizeless types contain data with no specified size, alignment,
/// or layout.
bool isSizelessType() const;
bool isSizelessBuiltinType() const;

/// Determines if this is a sizeless type supported by the
/// 'arm_sve_vector_bits' type attribute, which can be applied to a single
/// SVE vector or predicate, excluding tuple types such as svint32x4_t.
bool isVLSTBuiltinType() const;

/// Returns the representative type for the element of an SVE builtin type.
/// This is used to represent fixed-length SVE vectors created with the
/// 'arm_sve_vector_bits' type attribute as VectorType.
QualType getSveEltType(const ASTContext &Ctx) const;

/// Types are partitioned into 3 broad categories (C99 6.2.5p1):
/// object types, function types, and incomplete types.

/// Return true if this is an incomplete type.
/// A type that can describe objects, but which lacks information needed to
/// determine its size (e.g. void, or a fwd declared struct). Clients of this
/// routine will need to determine if the size is actually required.
///
/// Def If non-null, and the type refers to some kind of declaration
/// that can be completed (such as a C struct, C++ class, or Objective-C
/// class), will be set to the declaration.
bool isIncompleteType(NamedDecl **Def = nullptr) const;

/// Return true if this is an incomplete or object
/// type, in other words, not a function type.
bool isIncompleteOrObjectType() const {
  return !isFunctionType();
}

/// Determine whether this type is an object type.
bool isObjectType() const {
  // C++ [basic.types]p8:
  //   An object type is a (possibly cv-qualified) type that is not a
  //   function type, not a reference type, and not a void type.
  return !isReferenceType() && !isFunctionType() && !isVoidType();
}

/// Return true if this is a literal type
/// (C++11 [basic.types]p10)
bool isLiteralType(const ASTContext &Ctx) const;

/// Determine if this type is a structural type, per C++20 [temp.param]p7.
bool isStructuralType() const;

/// Test if this type is a standard-layout type.
/// (C++0x [basic.type]p9)
bool isStandardLayoutType() const;

/// Helper methods to distinguish type categories. All type predicates
/// operate on the canonical type, ignoring typedefs and qualifiers.

/// Returns true if the type is a builtin type.
bool isBuiltinType() const;

/// Test for a particular builtin type.
bool isSpecificBuiltinType(unsigned K) const;

/// Test for a type which does not represent an actual type-system type but
/// is instead used as a placeholder for various convenient purposes within
/// Clang.  All such types are BuiltinTypes.
bool isPlaceholderType() const;
const BuiltinType *getAsPlaceholderType() const;

/// Test for a specific placeholder type.
bool isSpecificPlaceholderType(unsigned K) const;

/// Test for a placeholder type other than Overload; see
/// BuiltinType::isNonOverloadPlaceholderType.
bool isNonOverloadPlaceholderType() const;

/// isIntegerType() does *not* include complex integers (a GCC extension).
/// isComplexIntegerType() can be used to test for complex integers.
bool isIntegerType() const;     // C99 6.2.5p17 (int, char, bool, enum)
bool isEnumeralType() const;

/// Determine whether this type is a scoped enumeration type.
bool isScopedEnumeralType() const;
bool isBooleanType() const;
bool isCharType() const;
bool isWideCharType() const;
bool isChar8Type() const;
bool isChar16Type() const;
bool isChar32Type() const;
bool isAnyCharacterType() const;
bool isIntegralType(const ASTContext &Ctx) const;

/// Determine whether this type is an integral or enumeration type.
bool isIntegralOrEnumerationType() const;

/// Determine whether this type is an integral or unscoped enumeration type.
bool isIntegralOrUnscopedEnumerationType() const;
bool isUnscopedEnumerationType() const;

/// Floating point categories.
bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double)
/// isComplexType() does *not* include complex integers (a GCC extension).
/// isComplexIntegerType() can be used to test for complex integers.
bool isComplexType() const;      // C99 6.2.5p11 (complex)
bool isAnyComplexType() const;   // C99 6.2.5p11 (complex) + Complex Int.
bool isFloatingType() const;     // C99 6.2.5p11 (real floating + complex)
bool isHalfType() const;         // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half)
bool isFloat16Type() const;      // C11 extension ISO/IEC TS 18661
bool isBFloat16Type() const;
bool isFloat128Type() const;
bool isRealType() const;         // C99 6.2.5p17 (real floating + integer)
bool isArithmeticType() const;   // C99 6.2.5p18 (integer + floating)
bool isVoidType() const;         // C99 6.2.5p19
bool isScalarType() const;       // C99 6.2.5p21 (arithmetic + pointers)
bool isAggregateType() const;
bool isFundamentalType() const;
bool isCompoundType() const;

// Type Predicates: Check to see if this type is structurally the specified
// type, ignoring typedefs and qualifiers.
bool isFunctionType() const;
bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); }
bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); }
bool isPointerType() const;
bool isAnyPointerType() const;   // Any C pointer or ObjC object pointer
bool isBlockPointerType() const;
bool isVoidPointerType() const;
bool isReferenceType() const;
bool isLValueReferenceType() const;
bool isRValueReferenceType() const;
bool isObjectPointerType() const;
bool isFunctionPointerType() const;
bool isFunctionReferenceType() const;
bool isMemberPointerType() const;
bool isMemberFunctionPointerType() const;
bool isMemberDataPointerType() const;
bool isArrayType() const;
bool isConstantArrayType() const;
bool isIncompleteArrayType() const;
bool isVariableArrayType() const;
bool isDependentSizedArrayType() const;
bool isRecordType() const;
bool isClassType() const;
bool isStructureType() const;
bool isObjCBoxableRecordType() const;
bool isInterfaceType() const;
bool isStructureOrClassType() const;
bool isUnionType() const;
bool isComplexIntegerType() const;            // GCC _Complex integer type.
bool isVectorType() const;                    // GCC vector type.
bool isExtVectorType() const;                 // Extended vector type.
bool isMatrixType() const;                    // Matrix type.
bool isConstantMatrixType() const;            // Constant matrix type.
bool isDependentAddressSpaceType() const;     // value-dependent address space qualifier
bool isObjCObjectPointerType() const;         // pointer to ObjC object
bool isObjCRetainableType() const;            // ObjC object or block pointer
bool isObjCLifetimeType() const;              // (array of)* retainable type
bool isObjCIndirectLifetimeType() const;      // (pointer to)* lifetime type
bool isObjCNSObjectType() const;              // __attribute__((NSObject))
bool isObjCIndependentClassType() const;      // __attribute__((objc_independent_class))
// FIXME: change this to 'raw' interface type, so we can used 'interface' type
// for the common case.
bool isObjCObjectType() const;                // NSString or typeof(*(id)0)
bool isObjCQualifiedInterfaceType() const;    // NSString<foo>
bool isObjCQualifiedIdType() const;           // id<foo>
bool isObjCQualifiedClassType() const;        // Class<foo>
bool isObjCObjectOrInterfaceType() const;
bool isObjCIdType() const;                    // id
bool isDecltypeType() const;
/// Was this type written with the special inert-in-ARC __unsafe_unretained
/// qualifier?
///
/// This approximates the answer to the following question: if this
/// translation unit were compiled in ARC, would this type be qualified
/// with __unsafe_unretained?
bool isObjCInertUnsafeUnretainedType() const {
  return hasAttr(attr::ObjCInertUnsafeUnretained);
}

/// Whether the type is Objective-C 'id' or a __kindof type of an
/// object type, e.g., __kindof NSView * or __kindof id
/// <NSCopying>.
///
/// \param bound Will be set to the bound on non-id subtype types,
/// which will be (possibly specialized) Objective-C class type, or
/// null for 'id.
bool isObjCIdOrObjectKindOfType(const ASTContext &ctx,
                                const ObjCObjectType *&bound) const;

bool isObjCClassType() const;                 // Class

/// Whether the type is Objective-C 'Class' or a __kindof type of an
/// Class type, e.g., __kindof Class <NSCopying>.
///
/// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound
/// here because Objective-C's type system cannot express "a class
/// object for a subclass of NSFoo".
bool isObjCClassOrClassKindOfType() const;

bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const;
bool isObjCSelType() const;                 // Class
bool isObjCBuiltinType() const;               // 'id' or 'Class'
bool isObjCARCBridgableType() const;
bool isCARCBridgableType() const;
bool isTemplateTypeParmType() const;          // C++ template type parameter
bool isNullPtrType() const;                   // C++11 std::nullptr_t
bool isNothrowT() const;                      // C++   std::nothrow_t
bool isAlignValT() const;                     // C++17 std::align_val_t
bool isStdByteType() const;                   // C++17 std::byte
bool isAtomicType() const;                    // C11 _Atomic()
bool isUndeducedAutoType() const;             // C++11 auto or
                                              // C++14 decltype(auto)
bool isTypedefNameType() const;               // typedef or alias template

2105#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
bool is##Id##Type() const;
2107#include "clang/Basic/OpenCLImageTypes.def"

bool isImageType() const;                     // Any OpenCL image type

bool isSamplerT() const;                      // OpenCL sampler_t
bool isEventT() const;                        // OpenCL event_t
bool isClkEventT() const;                     // OpenCL clk_event_t
bool isQueueT() const;                        // OpenCL queue_t
bool isReserveIDT() const;                    // OpenCL reserve_id_t

2117#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
bool is##Id##Type() const;
2119#include "clang/Basic/OpenCLExtensionTypes.def"
// Type defined in cl_intel_device_side_avc_motion_estimation OpenCL extension
bool isOCLIntelSubgroupAVCType() const;
bool isOCLExtOpaqueType() const;              // Any OpenCL extension type

bool isPipeType() const;                      // OpenCL pipe type
bool isExtIntType() const;                    // Extended Int Type
bool isOpenCLSpecificType() const;            // Any OpenCL specific type

/// Determines if this type, which must satisfy
/// isObjCLifetimeType(), is implicitly __unsafe_unretained rather
/// than implicitly __strong.
bool isObjCARCImplicitlyUnretainedType() const;

/// Check if the type is the CUDA device builtin surface type.
bool isCUDADeviceBuiltinSurfaceType() const;
/// Check if the type is the CUDA device builtin texture type.
bool isCUDADeviceBuiltinTextureType() const;

/// Return the implicit lifetime for this type, which must not be dependent.
Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const;

enum ScalarTypeKind {
  STK_CPointer,
  STK_BlockPointer,
  STK_ObjCObjectPointer,
  STK_MemberPointer,
  STK_Bool,
  STK_Integral,
  STK_Floating,
  STK_IntegralComplex,
  STK_FloatingComplex,
  STK_FixedPoint
};

/// Given that this is a scalar type, classify it.
ScalarTypeKind getScalarTypeKind() const;

TypeDependence getDependence() const {
  return static_cast<TypeDependence>(TypeBits.Dependence);
}

/// Whether this type is an error type.
bool containsErrors() const {
  return getDependence() & TypeDependence::Error;
}

/// Whether this type is a dependent type, meaning that its definition
/// somehow depends on a template parameter (C++ [temp.dep.type]).
bool isDependentType() const {
  return getDependence() & TypeDependence::Dependent;
}

/// Determine whether this type is an instantiation-dependent type,
/// meaning that the type involves a template parameter (even if the
/// definition does not actually depend on the type substituted for that
/// template parameter).
bool isInstantiationDependentType() const {
  return getDependence() & TypeDependence::Instantiation;
}

/// Determine whether this type is an undeduced type, meaning that
/// it somehow involves a C++11 'auto' type or similar which has not yet been
/// deduced.
bool isUndeducedType() const;

/// Whether this type is a variably-modified type (C99 6.7.5).
bool isVariablyModifiedType() const {
  return getDependence() & TypeDependence::VariablyModified;
}

/// Whether this type involves a variable-length array type
/// with a definite size.
bool hasSizedVLAType() const;

/// Whether this type is or contains a local or unnamed type.
bool hasUnnamedOrLocalType() const;

bool isOverloadableType() const;

/// Determine wither this type is a C++ elaborated-type-specifier.
bool isElaboratedTypeSpecifier() const;

bool canDecayToPointerType() const;

/// Whether this type is represented natively as a pointer.  This includes
/// pointers, references, block pointers, and Objective-C interface,
/// qualified id, and qualified interface types, as well as nullptr_t.
bool hasPointerRepresentation() const;

/// Whether this type can represent an objective pointer type for the
/// purpose of GC'ability
bool hasObjCPointerRepresentation() const;

/// Determine whether this type has an integer representation
/// of some sort, e.g., it is an integer type or a vector.
bool hasIntegerRepresentation() const;

/// Determine whether this type has an signed integer representation
/// of some sort, e.g., it is an signed integer type or a vector.
bool hasSignedIntegerRepresentation() const;

/// Determine whether this type has an unsigned integer representation
/// of some sort, e.g., it is an unsigned integer type or a vector.
bool hasUnsignedIntegerRepresentation() const;

/// Determine whether this type has a floating-point representation
/// of some sort, e.g., it is a floating-point type or a vector thereof.
bool hasFloatingRepresentation() const;

// Type Checking Functions: Check to see if this type is structurally the
// specified type, ignoring typedefs and qualifiers, and return a pointer to
// the best type we can.
const RecordType *getAsStructureType() const;
/// NOTE: getAs*ArrayType are methods on ASTContext.
const RecordType *getAsUnionType() const;
const ComplexType *getAsComplexIntegerType() const; // GCC complex int type.
const ObjCObjectType *getAsObjCInterfaceType() const;

// The following is a convenience method that returns an ObjCObjectPointerType
// for object declared using an interface.
const ObjCObjectPointerType *getAsObjCInterfacePointerType() const;
const ObjCObjectPointerType *getAsObjCQualifiedIdType() const;
const ObjCObjectPointerType *getAsObjCQualifiedClassType() const;
const ObjCObjectType *getAsObjCQualifiedInterfaceType() const;

/// Retrieves the CXXRecordDecl that this type refers to, either
/// because the type is a RecordType or because it is the injected-class-name
/// type of a class template or class template partial specialization.
CXXRecordDecl *getAsCXXRecordDecl() const;

/// Retrieves the RecordDecl this type refers to.
RecordDecl *getAsRecordDecl() const;

/// Retrieves the TagDecl that this type refers to, either
/// because the type is a TagType or because it is the injected-class-name
/// type of a class template or class template partial specialization.
TagDecl *getAsTagDecl() const;

/// If this is a pointer or reference to a RecordType, return the
/// CXXRecordDecl that the type refers to.
///
/// If this is not a pointer or reference, or the type being pointed to does
/// not refer to a CXXRecordDecl, returns NULL.
const CXXRecordDecl *getPointeeCXXRecordDecl() const;

/// Get the DeducedType whose type will be deduced for a variable with
/// an initializer of this type. This looks through declarators like pointer
/// types, but not through decltype or typedefs.
DeducedType *getContainedDeducedType() const;

/// Get the AutoType whose type will be deduced for a variable with
/// an initializer of this type. This looks through declarators like pointer
/// types, but not through decltype or typedefs.
AutoType *getContainedAutoType() const {
  return dyn_cast_or_null<AutoType>(getContainedDeducedType());
}

/// Determine whether this type was written with a leading 'auto'
/// corresponding to a trailing return type (possibly for a nested
/// function type within a pointer to function type or similar).
bool hasAutoForTrailingReturnType() const;

/// Member-template getAs<specific type>'.  Look through sugar for
/// an instance of \<specific type>.   This scheme will eventually
/// replace the specific getAsXXXX methods above.
///
/// There are some specializations of this member template listed
/// immediately following this class.
template <typename T> const T *getAs() const;

/// Member-template getAsAdjusted<specific type>. Look through specific kinds
/// of sugar (parens, attributes, etc) for an instance of \<specific type>.
/// This is used when you need to walk over sugar nodes that represent some
/// kind of type adjustment from a type that was written as a \<specific type>
/// to another type that is still canonically a \<specific type>.
template <typename T> const T *getAsAdjusted() const;

/// A variant of getAs<> for array types which silently discards
/// qualifiers from the outermost type.
const ArrayType *getAsArrayTypeUnsafe() const;

/// Member-template castAs<specific type>.  Look through sugar for
/// the underlying instance of \<specific type>.
///
/// This method has the same relationship to getAs<T> as cast<T> has
/// to dyn_cast<T>; which is to say, the underlying type *must*
/// have the intended type, and this method will never return null.
template <typename T> const T *castAs() const;

/// A variant of castAs<> for array type which silently discards
/// qualifiers from the outermost type.
const ArrayType *castAsArrayTypeUnsafe() const;

/// Determine whether this type had the specified attribute applied to it
/// (looking through top-level type sugar).
bool hasAttr(attr::Kind AK) const;

/// Get the base element type of this type, potentially discarding type
/// qualifiers.  This should never be used when type qualifiers
/// are meaningful.
const Type *getBaseElementTypeUnsafe() const;

/// If this is an array type, return the element type of the array,
/// potentially with type qualifiers missing.
/// This should never be used when type qualifiers are meaningful.
const Type *getArrayElementTypeNoTypeQual() const;

/// If this is a pointer type, return the pointee type.
/// If this is an array type, return the array element type.
/// This should never be used when type qualifiers are meaningful.
const Type *getPointeeOrArrayElementType() const;

/// If this is a pointer, ObjC object pointer, or block
/// pointer, this returns the respective pointee.
QualType getPointeeType() const;

/// Return the specified type with any "sugar" removed from the type,
/// removing any typedefs, typeofs, etc., as well as any qualifiers.
const Type *getUnqualifiedDesugaredType() const;

/// More type predicates useful for type checking/promotion
bool isPromotableIntegerType() const; // C99 6.3.1.1p2

/// Return true if this is an integer type that is
/// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..],
/// or an enum decl which has a signed representation.
bool isSignedIntegerType() const;

/// Return true if this is an integer type that is
/// unsigned, according to C99 6.2.5p6 [which returns true for _Bool],
/// or an enum decl which has an unsigned representation.
bool isUnsignedIntegerType() const;

/// Determines whether this is an integer type that is signed or an
/// enumeration types whose underlying type is a signed integer type.
bool isSignedIntegerOrEnumerationType() const;

/// Determines whether this is an integer type that is unsigned or an
/// enumeration types whose underlying type is a unsigned integer type.
bool isUnsignedIntegerOrEnumerationType() const;

/// Return true if this is a fixed point type according to
/// ISO/IEC JTC1 SC22 WG14 N1169.
bool isFixedPointType() const;

/// Return true if this is a fixed point or integer type.
bool isFixedPointOrIntegerType() const;

/// Return true if this is a saturated fixed point type according to
/// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned.
bool isSaturatedFixedPointType() const;

/// Return true if this is a saturated fixed point type according to
/// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned.
bool isUnsaturatedFixedPointType() const;

/// Return true if this is a fixed point type that is signed according
/// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated.
bool isSignedFixedPointType() const;

/// Return true if this is a fixed point type that is unsigned according
/// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated.
bool isUnsignedFixedPointType() const;

/// Return true if this is not a variable sized type,
/// according to the rules of C99 6.7.5p3.  It is not legal to call this on
/// incomplete types.
bool isConstantSizeType() const;

/// Returns true if this type can be represented by some
/// set of type specifiers.
bool isSpecifierType() const;

/// Determine the linkage of this type.
Linkage getLinkage() const;

/// Determine the visibility of this type.
Visibility getVisibility() const {
  return getLinkageAndVisibility().getVisibility();
}

/// Return true if the visibility was explicitly set is the code.
bool isVisibilityExplicit() const {
  return getLinkageAndVisibility().isVisibilityExplicit();
}

/// Determine the linkage and visibility of this type.
LinkageInfo getLinkageAndVisibility() const;

/// True if the computed linkage is valid. Used for consistency
/// checking. Should always return true.
bool isLinkageValid() const;

/// Determine the nullability of the given type.
///
/// Note that nullability is only captured as sugar within the type
/// system, not as part of the canonical type, so nullability will
/// be lost by canonicalization and desugaring.
Optional<NullabilityKind> getNullability(const ASTContext &context) const;

/// Determine whether the given type can have a nullability
/// specifier applied to it, i.e., if it is any kind of pointer type.
///
/// \param ResultIfUnknown The value to return if we don't yet know whether
///        this type can have nullability because it is dependent.
bool canHaveNullability(bool ResultIfUnknown = true) const;

/// Retrieve the set of substitutions required when accessing a member
/// of the Objective-C receiver type that is declared in the given context.
///
/// \c *this is the type of the object we're operating on, e.g., the
/// receiver for a message send or the base of a property access, and is
/// expected to be of some object or object pointer type.
///
/// \param dc The declaration context for which we are building up a
/// substitution mapping, which should be an Objective-C class, extension,
/// category, or method within.
///
/// \returns an array of type arguments that can be substituted for
/// the type parameters of the given declaration context in any type described
/// within that context, or an empty optional to indicate that no
/// substitution is required.
Optional<ArrayRef<QualType>>
getObjCSubstitutions(const DeclContext *dc) const;

/// Determines if this is an ObjC interface type that may accept type
/// parameters.
bool acceptsObjCTypeParams() const;

const char *getTypeClassName() const;

QualType getCanonicalTypeInternal() const {
  return CanonicalType;
}

CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h
void dump() const;
void dump(llvm::raw_ostream &OS, const ASTContext &Context) const;
2458};

2460/// This will check for a TypedefType by removing any existing sugar
2461/// until it reaches a TypedefType or a non-sugared type.
2462template <> const TypedefType *Type::getAs() const;

2464/// This will check for a TemplateSpecializationType by removing any
2465/// existing sugar until it reaches a TemplateSpecializationType or a
2466/// non-sugared type.
2467template <> const TemplateSpecializationType *Type::getAs() const;

2469/// This will check for an AttributedType by removing any existing sugar
2470/// until it reaches an AttributedType or a non-sugared type.
2471template <> const AttributedType *Type::getAs() const;

2473// We can do canonical leaf types faster, because we don't have to
2474// worry about preserving child type decoration.
2475#define TYPE(Class, Base)
2476#define LEAF_TYPE(Class) \
2477template <> inline const Class##Type *Type::getAs() const { \
return dyn_cast<Class##Type>(CanonicalType); \
2479} \
2480template <> inline const Class##Type *Type::castAs() const { \
return cast<Class##Type>(CanonicalType); \
2482}
2483#include "clang/AST/TypeNodes.inc"

2485/// This class is used for builtin types like 'int'.  Builtin
2486/// types are always canonical and have a literal name field.
2487class BuiltinType : public Type {
2488public:
enum Kind {
2490// OpenCL image types
2491#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id,
2492#include "clang/Basic/OpenCLImageTypes.def"
2493// OpenCL extension types
2494#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) Id,
2495#include "clang/Basic/OpenCLExtensionTypes.def"
2496// SVE Types
2497#define SVE_TYPE(Name, Id, SingletonId) Id,
2498#include "clang/Basic/AArch64SVEACLETypes.def"
2499// PPC MMA Types
2500#define PPC_VECTOR_TYPE(Name, Id, Size) Id,
2501#include "clang/Basic/PPCTypes.def"
2502// RVV Types
2503#define RVV_TYPE(Name, Id, SingletonId) Id,
2504#include "clang/Basic/RISCVVTypes.def"
2505// All other builtin types
2506#define BUILTIN_TYPE(Id, SingletonId) Id,
2507#define LAST_BUILTIN_TYPE(Id) LastKind = Id
2508#include "clang/AST/BuiltinTypes.def"
};

2511private:
friend class ASTContext; // ASTContext creates these.

BuiltinType(Kind K)
    : Type(Builtin, QualType(),
           K == Dependent ? TypeDependence::DependentInstantiation
                          : TypeDependence::None) {
  BuiltinTypeBits.Kind = K;
}

2521public:
Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); }
StringRef getName(const PrintingPolicy &Policy) const;

const char *getNameAsCString(const PrintingPolicy &Policy) const {
  // The StringRef is null-terminated.
  StringRef str = getName(Policy);
  assert(!str.empty() && str.data()[str.size()] == '\0')((void)0);
  return str.data();
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

bool isInteger() const {
  return getKind() >= Bool && getKind() <= Int128;
}

bool isSignedInteger() const {
  return getKind() >= Char_S && getKind() <= Int128;
}

bool isUnsignedInteger() const {
  return getKind() >= Bool && getKind() <= UInt128;
}

bool isFloatingPoint() const {
  return getKind() >= Half && getKind() <= Float128;
}

/// Determines whether the given kind corresponds to a placeholder type.
static bool isPlaceholderTypeKind(Kind K) {
  return K >= Overload;
}

/// Determines whether this type is a placeholder type, i.e. a type
/// which cannot appear in arbitrary positions in a fully-formed
/// expression.
bool isPlaceholderType() const {
  return isPlaceholderTypeKind(getKind());
}

/// Determines whether this type is a placeholder type other than
/// Overload.  Most placeholder types require only syntactic
/// information about their context in order to be resolved (e.g.
/// whether it is a call expression), which means they can (and
/// should) be resolved in an earlier "phase" of analysis.
/// Overload expressions sometimes pick up further information
/// from their context, like whether the context expects a
/// specific function-pointer type, and so frequently need
/// special treatment.
bool isNonOverloadPlaceholderType() const {
  return getKind() > Overload;
}

static bool classof(const Type *T) { return T->getTypeClass() == Builtin; }
2577};

2579/// Complex values, per C99 6.2.5p11.  This supports the C99 complex
2580/// types (_Complex float etc) as well as the GCC integer complex extensions.
2581class ComplexType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType ElementType;

ComplexType(QualType Element, QualType CanonicalPtr)
    : Type(Complex, CanonicalPtr, Element->getDependence()),
      ElementType(Element) {}

2590public:
QualType getElementType() const { return ElementType; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) {
  ID.AddPointer(Element.getAsOpaquePtr());
}

static bool classof(const Type *T) { return T->getTypeClass() == Complex; }
2605};

2607/// Sugar for parentheses used when specifying types.
2608class ParenType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType Inner;

ParenType(QualType InnerType, QualType CanonType)
    : Type(Paren, CanonType, InnerType->getDependence()), Inner(InnerType) {}

2616public:
QualType getInnerType() const { return Inner; }

bool isSugared() const { return true; }
QualType desugar() const { return getInnerType(); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getInnerType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) {
  Inner.Profile(ID);
}

static bool classof(const Type *T) { return T->getTypeClass() == Paren; }
2631};

2633/// PointerType - C99 6.7.5.1 - Pointer Declarators.
2634class PointerType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType PointeeType;

PointerType(QualType Pointee, QualType CanonicalPtr)
    : Type(Pointer, CanonicalPtr, Pointee->getDependence()),
      PointeeType(Pointee) {}

2643public:
QualType getPointeeType() const { return PointeeType; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getPointeeType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) {
  ID.AddPointer(Pointee.getAsOpaquePtr());
}

static bool classof(const Type *T) { return T->getTypeClass() == Pointer; }
2658};

2660/// Represents a type which was implicitly adjusted by the semantic
2661/// engine for arbitrary reasons.  For example, array and function types can
2662/// decay, and function types can have their calling conventions adjusted.
2663class AdjustedType : public Type, public llvm::FoldingSetNode {
QualType OriginalTy;
QualType AdjustedTy;

2667protected:
friend class ASTContext; // ASTContext creates these.

AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy,
             QualType CanonicalPtr)
    : Type(TC, CanonicalPtr, OriginalTy->getDependence()),
      OriginalTy(OriginalTy), AdjustedTy(AdjustedTy) {}

2675public:
QualType getOriginalType() const { return OriginalTy; }
QualType getAdjustedType() const { return AdjustedTy; }

bool isSugared() const { return true; }
QualType desugar() const { return AdjustedTy; }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, OriginalTy, AdjustedTy);
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New) {
  ID.AddPointer(Orig.getAsOpaquePtr());
  ID.AddPointer(New.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Adjusted || T->getTypeClass() == Decayed;
}
2694};

2696/// Represents a pointer type decayed from an array or function type.
2697class DecayedType : public AdjustedType {
friend class ASTContext; // ASTContext creates these.

inline
DecayedType(QualType OriginalType, QualType Decayed, QualType Canonical);

2703public:
QualType getDecayedType() const { return getAdjustedType(); }

inline QualType getPointeeType() const;

static bool classof(const Type *T) { return T->getTypeClass() == Decayed; }
2709};

2711/// Pointer to a block type.
2712/// This type is to represent types syntactically represented as
2713/// "void (^)(int)", etc. Pointee is required to always be a function type.
2714class BlockPointerType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

// Block is some kind of pointer type
QualType PointeeType;

BlockPointerType(QualType Pointee, QualType CanonicalCls)
    : Type(BlockPointer, CanonicalCls, Pointee->getDependence()),
      PointeeType(Pointee) {}

2724public:
// Get the pointee type. Pointee is required to always be a function type.
QualType getPointeeType() const { return PointeeType; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
    Profile(ID, getPointeeType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) {
    ID.AddPointer(Pointee.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == BlockPointer;
}
2742};

2744/// Base for LValueReferenceType and RValueReferenceType
2745class ReferenceType : public Type, public llvm::FoldingSetNode {
QualType PointeeType;

2748protected:
ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef,
              bool SpelledAsLValue)
    : Type(tc, CanonicalRef, Referencee->getDependence()),
      PointeeType(Referencee) {
  ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue;
  ReferenceTypeBits.InnerRef = Referencee->isReferenceType();
}

2757public:
bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; }
bool isInnerRef() const { return ReferenceTypeBits.InnerRef; }

QualType getPointeeTypeAsWritten() const { return PointeeType; }

QualType getPointeeType() const {
  // FIXME: this might strip inner qualifiers; okay?
  const ReferenceType *T = this;
  while (T->isInnerRef())
    T = T->PointeeType->castAs<ReferenceType>();
  return T->PointeeType;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, PointeeType, isSpelledAsLValue());
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    QualType Referencee,
                    bool SpelledAsLValue) {
  ID.AddPointer(Referencee.getAsOpaquePtr());
  ID.AddBoolean(SpelledAsLValue);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == LValueReference ||
         T->getTypeClass() == RValueReference;
}
2786};

2788/// An lvalue reference type, per C++11 [dcl.ref].
2789class LValueReferenceType : public ReferenceType {
friend class ASTContext; // ASTContext creates these

LValueReferenceType(QualType Referencee, QualType CanonicalRef,
                    bool SpelledAsLValue)
    : ReferenceType(LValueReference, Referencee, CanonicalRef,
                    SpelledAsLValue) {}

2797public:
bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == LValueReference;
}
2804};

2806/// An rvalue reference type, per C++11 [dcl.ref].
2807class RValueReferenceType : public ReferenceType {
friend class ASTContext; // ASTContext creates these

RValueReferenceType(QualType Referencee, QualType CanonicalRef)
     : ReferenceType(RValueReference, Referencee, CanonicalRef, false) {}

2813public:
bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == RValueReference;
}
2820};

2822/// A pointer to member type per C++ 8.3.3 - Pointers to members.
2823///
2824/// This includes both pointers to data members and pointer to member functions.
2825class MemberPointerType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType PointeeType;

/// The class of which the pointee is a member. Must ultimately be a
/// RecordType, but could be a typedef or a template parameter too.
const Type *Class;

MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr)
    : Type(MemberPointer, CanonicalPtr,
           (Cls->getDependence() & ~TypeDependence::VariablyModified) |
               Pointee->getDependence()),
      PointeeType(Pointee), Class(Cls) {}

2840public:
QualType getPointeeType() const { return PointeeType; }

/// Returns true if the member type (i.e. the pointee type) is a
/// function type rather than a data-member type.
bool isMemberFunctionPointer() const {
  return PointeeType->isFunctionProtoType();
}

/// Returns true if the member type (i.e. the pointee type) is a
/// data type rather than a function type.
bool isMemberDataPointer() const {
  return !PointeeType->isFunctionProtoType();
}

const Type *getClass() const { return Class; }
CXXRecordDecl *getMostRecentCXXRecordDecl() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getPointeeType(), getClass());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee,
                    const Type *Class) {
  ID.AddPointer(Pointee.getAsOpaquePtr());
  ID.AddPointer(Class);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == MemberPointer;
}
2874};

2876/// Represents an array type, per C99 6.7.5.2 - Array Declarators.
2877class ArrayType : public Type, public llvm::FoldingSetNode {
2878public:
/// Capture whether this is a normal array (e.g. int X[4])
/// an array with a static size (e.g. int X[static 4]), or an array
/// with a star size (e.g. int X[*]).
/// 'static' is only allowed on function parameters.
enum ArraySizeModifier {
  Normal, Static, Star
};

2887private:
/// The element type of the array.
QualType ElementType;

2891protected:
friend class ASTContext; // ASTContext creates these.

ArrayType(TypeClass tc, QualType et, QualType can, ArraySizeModifier sm,
          unsigned tq, const Expr *sz = nullptr);

2897public:
QualType getElementType() const { return ElementType; }

ArraySizeModifier getSizeModifier() const {
  return ArraySizeModifier(ArrayTypeBits.SizeModifier);
}

Qualifiers getIndexTypeQualifiers() const {
  return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers());
}

unsigned getIndexTypeCVRQualifiers() const {
  return ArrayTypeBits.IndexTypeQuals;
}

static bool classof(const Type *T) {
  return T->getTypeClass() == ConstantArray ||
         T->getTypeClass() == VariableArray ||
         T->getTypeClass() == IncompleteArray ||
         T->getTypeClass() == DependentSizedArray;
}
2918};

2920/// Represents the canonical version of C arrays with a specified constant size.
2921/// For example, the canonical type for 'int A[4 + 4*100]' is a
2922/// ConstantArrayType where the element type is 'int' and the size is 404.
2923class ConstantArrayType final
  : public ArrayType,
    private llvm::TrailingObjects<ConstantArrayType, const Expr *> {
friend class ASTContext; // ASTContext creates these.
friend TrailingObjects;

llvm::APInt Size; // Allows us to unique the type.

ConstantArrayType(QualType et, QualType can, const llvm::APInt &size,
                  const Expr *sz, ArraySizeModifier sm, unsigned tq)
    : ArrayType(ConstantArray, et, can, sm, tq, sz), Size(size) {
  ConstantArrayTypeBits.HasStoredSizeExpr = sz != nullptr;
  if (ConstantArrayTypeBits.HasStoredSizeExpr) {
    assert(!can.isNull() && "canonical constant array should not have size")((void)0);
    *getTrailingObjects<const Expr*>() = sz;
  }
}

unsigned numTrailingObjects(OverloadToken<const Expr*>) const {
  return ConstantArrayTypeBits.HasStoredSizeExpr;
}

2945public:
const llvm::APInt &getSize() const { return Size; }
const Expr *getSizeExpr() const {
  return ConstantArrayTypeBits.HasStoredSizeExpr
             ? *getTrailingObjects<const Expr *>()
             : nullptr;
}
bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

/// Determine the number of bits required to address a member of
// an array with the given element type and number of elements.
static unsigned getNumAddressingBits(const ASTContext &Context,
                                     QualType ElementType,
                                     const llvm::APInt &NumElements);

/// Determine the maximum number of active bits that an array's size
/// can require, which limits the maximum size of the array.
static unsigned getMaxSizeBits(const ASTContext &Context);

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) {
  Profile(ID, Ctx, getElementType(), getSize(), getSizeExpr(),
          getSizeModifier(), getIndexTypeCVRQualifiers());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx,
                    QualType ET, const llvm::APInt &ArraySize,
                    const Expr *SizeExpr, ArraySizeModifier SizeMod,
                    unsigned TypeQuals);

static bool classof(const Type *T) {
  return T->getTypeClass() == ConstantArray;
}
2978};

2980/// Represents a C array with an unspecified size.  For example 'int A[]' has
2981/// an IncompleteArrayType where the element type is 'int' and the size is
2982/// unspecified.
2983class IncompleteArrayType : public ArrayType {
friend class ASTContext; // ASTContext creates these.

IncompleteArrayType(QualType et, QualType can,
                    ArraySizeModifier sm, unsigned tq)
    : ArrayType(IncompleteArray, et, can, sm, tq) {}

2990public:
friend class StmtIteratorBase;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == IncompleteArray;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType(), getSizeModifier(),
          getIndexTypeCVRQualifiers());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType ET,
                    ArraySizeModifier SizeMod, unsigned TypeQuals) {
  ID.AddPointer(ET.getAsOpaquePtr());
  ID.AddInteger(SizeMod);
  ID.AddInteger(TypeQuals);
}
3011};

3013/// Represents a C array with a specified size that is not an
3014/// integer-constant-expression.  For example, 'int s[x+foo()]'.
3015/// Since the size expression is an arbitrary expression, we store it as such.
3016///
3017/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and
3018/// should not be: two lexically equivalent variable array types could mean
3019/// different things, for example, these variables do not have the same type
3020/// dynamically:
3021///
3022/// void foo(int x) {
3023///   int Y[x];
3024///   ++x;
3025///   int Z[x];
3026/// }
3027class VariableArrayType : public ArrayType {
friend class ASTContext; // ASTContext creates these.

/// An assignment-expression. VLA's are only permitted within
/// a function block.
Stmt *SizeExpr;

/// The range spanned by the left and right array brackets.
SourceRange Brackets;

VariableArrayType(QualType et, QualType can, Expr *e,
                  ArraySizeModifier sm, unsigned tq,
                  SourceRange brackets)
    : ArrayType(VariableArray, et, can, sm, tq, e),
      SizeExpr((Stmt*) e), Brackets(brackets) {}

3043public:
friend class StmtIteratorBase;

Expr *getSizeExpr() const {
  // We use C-style casts instead of cast<> here because we do not wish
  // to have a dependency of Type.h on Stmt.h/Expr.h.
  return (Expr*) SizeExpr;
}

SourceRange getBracketsRange() const { return Brackets; }
SourceLocation getLBracketLoc() const { return Brackets.getBegin(); }
SourceLocation getRBracketLoc() const { return Brackets.getEnd(); }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == VariableArray;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  llvm_unreachable("Cannot unique VariableArrayTypes.")__builtin_unreachable();
}
3066};

3068/// Represents an array type in C++ whose size is a value-dependent expression.
3069///
3070/// For example:
3071/// \code
3072/// template<typename T, int Size>
3073/// class array {
3074///   T data[Size];
3075/// };
3076/// \endcode
3077///
3078/// For these types, we won't actually know what the array bound is
3079/// until template instantiation occurs, at which point this will
3080/// become either a ConstantArrayType or a VariableArrayType.
3081class DependentSizedArrayType : public ArrayType {
friend class ASTContext; // ASTContext creates these.

const ASTContext &Context;

/// An assignment expression that will instantiate to the
/// size of the array.
///
/// The expression itself might be null, in which case the array
/// type will have its size deduced from an initializer.
Stmt *SizeExpr;

/// The range spanned by the left and right array brackets.
SourceRange Brackets;

DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can,
                        Expr *e, ArraySizeModifier sm, unsigned tq,
                        SourceRange brackets);

3100public:
friend class StmtIteratorBase;

Expr *getSizeExpr() const {
  // We use C-style casts instead of cast<> here because we do not wish
  // to have a dependency of Type.h on Stmt.h/Expr.h.
  return (Expr*) SizeExpr;
}

SourceRange getBracketsRange() const { return Brackets; }
SourceLocation getLBracketLoc() const { return Brackets.getBegin(); }
SourceLocation getRBracketLoc() const { return Brackets.getEnd(); }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentSizedArray;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getElementType(),
          getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType ET, ArraySizeModifier SizeMod,
                    unsigned TypeQuals, Expr *E);
3128};

3130/// Represents an extended address space qualifier where the input address space
3131/// value is dependent. Non-dependent address spaces are not represented with a
3132/// special Type subclass; they are stored on an ExtQuals node as part of a QualType.
3133///
3134/// For example:
3135/// \code
3136/// template<typename T, int AddrSpace>
3137/// class AddressSpace {
3138///   typedef T __attribute__((address_space(AddrSpace))) type;
3139/// }
3140/// \endcode
3141class DependentAddressSpaceType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

const ASTContext &Context;
Expr *AddrSpaceExpr;
QualType PointeeType;
SourceLocation loc;

DependentAddressSpaceType(const ASTContext &Context, QualType PointeeType,
                          QualType can, Expr *AddrSpaceExpr,
                          SourceLocation loc);

3153public:
Expr *getAddrSpaceExpr() const { return AddrSpaceExpr; }
QualType getPointeeType() const { return PointeeType; }
SourceLocation getAttributeLoc() const { return loc; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentAddressSpace;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getPointeeType(), getAddrSpaceExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType PointeeType, Expr *AddrSpaceExpr);
3171};

3173/// Represents an extended vector type where either the type or size is
3174/// dependent.
3175///
3176/// For example:
3177/// \code
3178/// template<typename T, int Size>
3179/// class vector {
3180///   typedef T __attribute__((ext_vector_type(Size))) type;
3181/// }
3182/// \endcode
3183class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

const ASTContext &Context;
Expr *SizeExpr;

/// The element type of the array.
QualType ElementType;

SourceLocation loc;

DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType,
                            QualType can, Expr *SizeExpr, SourceLocation loc);

3197public:
Expr *getSizeExpr() const { return SizeExpr; }
QualType getElementType() const { return ElementType; }
SourceLocation getAttributeLoc() const { return loc; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentSizedExtVector;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getElementType(), getSizeExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType ElementType, Expr *SizeExpr);
3215};


3218/// Represents a GCC generic vector type. This type is created using
3219/// __attribute__((vector_size(n)), where "n" specifies the vector size in
3220/// bytes; or from an Altivec __vector or vector declaration.
3221/// Since the constructor takes the number of vector elements, the
3222/// client is responsible for converting the size into the number of elements.
3223class VectorType : public Type, public llvm::FoldingSetNode {
3224public:
enum VectorKind {
  /// not a target-specific vector type
  GenericVector,

  /// is AltiVec vector
  AltiVecVector,

  /// is AltiVec 'vector Pixel'
  AltiVecPixel,

  /// is AltiVec 'vector bool ...'
  AltiVecBool,

  /// is ARM Neon vector
  NeonVector,

  /// is ARM Neon polynomial vector
  NeonPolyVector,

  /// is AArch64 SVE fixed-length data vector
  SveFixedLengthDataVector,

  /// is AArch64 SVE fixed-length predicate vector
  SveFixedLengthPredicateVector
};

3251protected:
friend class ASTContext; // ASTContext creates these.

/// The element type of the vector.
QualType ElementType;

VectorType(QualType vecType, unsigned nElements, QualType canonType,
           VectorKind vecKind);

VectorType(TypeClass tc, QualType vecType, unsigned nElements,
           QualType canonType, VectorKind vecKind);

3263public:
QualType getElementType() const { return ElementType; }
unsigned getNumElements() const { return VectorTypeBits.NumElements; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

VectorKind getVectorKind() const {
  return VectorKind(VectorTypeBits.VecKind);
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType(), getNumElements(),
          getTypeClass(), getVectorKind());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType,
                    unsigned NumElements, TypeClass TypeClass,
                    VectorKind VecKind) {
  ID.AddPointer(ElementType.getAsOpaquePtr());
  ID.AddInteger(NumElements);
  ID.AddInteger(TypeClass);
  ID.AddInteger(VecKind);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector;
}
3291};

3293/// Represents a vector type where either the type or size is dependent.
3294////
3295/// For example:
3296/// \code
3297/// template<typename T, int Size>
3298/// class vector {
3299///   typedef T __attribute__((vector_size(Size))) type;
3300/// }
3301/// \endcode
3302class DependentVectorType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

const ASTContext &Context;
QualType ElementType;
Expr *SizeExpr;
SourceLocation Loc;

DependentVectorType(const ASTContext &Context, QualType ElementType,
                         QualType CanonType, Expr *SizeExpr,
                         SourceLocation Loc, VectorType::VectorKind vecKind);

3314public:
Expr *getSizeExpr() const { return SizeExpr; }
QualType getElementType() const { return ElementType; }
SourceLocation getAttributeLoc() const { return Loc; }
VectorType::VectorKind getVectorKind() const {
  return VectorType::VectorKind(VectorTypeBits.VecKind);
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentVector;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getElementType(), getSizeExpr(), getVectorKind());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType ElementType, const Expr *SizeExpr,
                    VectorType::VectorKind VecKind);
3336};

3338/// ExtVectorType - Extended vector type. This type is created using
3339/// __attribute__((ext_vector_type(n)), where "n" is the number of elements.
3340/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This
3341/// class enables syntactic extensions, like Vector Components for accessing
3342/// points (as .xyzw), colors (as .rgba), and textures (modeled after OpenGL
3343/// Shading Language).
3344class ExtVectorType : public VectorType {
friend class ASTContext; // ASTContext creates these.

ExtVectorType(QualType vecType, unsigned nElements, QualType canonType)
    : VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {}

3350public:
static int getPointAccessorIdx(char c) {
  switch (c) {
  default: return -1;
  case 'x': case 'r': return 0;
  case 'y': case 'g': return 1;
  case 'z': case 'b': return 2;
  case 'w': case 'a': return 3;
  }
}

static int getNumericAccessorIdx(char c) {
  switch (c) {
    default: return -1;
    case '0': return 0;
    case '1': return 1;
    case '2': return 2;
    case '3': return 3;
    case '4': return 4;
    case '5': return 5;
    case '6': return 6;
    case '7': return 7;
    case '8': return 8;
    case '9': return 9;
    case 'A':
    case 'a': return 10;
    case 'B':
    case 'b': return 11;
    case 'C':
    case 'c': return 12;
    case 'D':
    case 'd': return 13;
    case 'E':
    case 'e': return 14;
    case 'F':
    case 'f': return 15;
  }
}

static int getAccessorIdx(char c, bool isNumericAccessor) {
  if (isNumericAccessor)
    return getNumericAccessorIdx(c);
  else
    return getPointAccessorIdx(c);
}

bool isAccessorWithinNumElements(char c, bool isNumericAccessor) const {
  if (int idx = getAccessorIdx(c, isNumericAccessor)+1)
    return unsigned(idx-1) < getNumElements();
  return false;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ExtVector;
}
3408};

3410/// Represents a matrix type, as defined in the Matrix Types clang extensions.
3411/// __attribute__((matrix_type(rows, columns))), where "rows" specifies
3412/// number of rows and "columns" specifies the number of columns.
3413class MatrixType : public Type, public llvm::FoldingSetNode {
3414protected:
friend class ASTContext;

/// The element type of the matrix.
QualType ElementType;

MatrixType(QualType ElementTy, QualType CanonElementTy);

MatrixType(TypeClass TypeClass, QualType ElementTy, QualType CanonElementTy,
           const Expr *RowExpr = nullptr, const Expr *ColumnExpr = nullptr);

3425public:
/// Returns type of the elements being stored in the matrix
QualType getElementType() const { return ElementType; }

/// Valid elements types are the following:
/// * an integer type (as in C2x 6.2.5p19), but excluding enumerated types
///   and _Bool
/// * the standard floating types float or double
/// * a half-precision floating point type, if one is supported on the target
static bool isValidElementType(QualType T) {
  return T->isDependentType() ||
         (T->isRealType() && !T->isBooleanType() && !T->isEnumeralType());
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ConstantMatrix ||
         T->getTypeClass() == DependentSizedMatrix;
}
3446};

3448/// Represents a concrete matrix type with constant number of rows and columns
3449class ConstantMatrixType final : public MatrixType {
3450protected:
friend class ASTContext;

/// The element type of the matrix.
// FIXME: Appears to be unused? There is also MatrixType::ElementType...
QualType ElementType;

/// Number of rows and columns.
unsigned NumRows;
unsigned NumColumns;

static constexpr unsigned MaxElementsPerDimension = (1 << 20) - 1;

ConstantMatrixType(QualType MatrixElementType, unsigned NRows,
                   unsigned NColumns, QualType CanonElementType);

ConstantMatrixType(TypeClass typeClass, QualType MatrixType, unsigned NRows,
                   unsigned NColumns, QualType CanonElementType);

3469public:
/// Returns the number of rows in the matrix.
unsigned getNumRows() const { return NumRows; }

/// Returns the number of columns in the matrix.
unsigned getNumColumns() const { return NumColumns; }

/// Returns the number of elements required to embed the matrix into a vector.
unsigned getNumElementsFlattened() const {
  return getNumRows() * getNumColumns();
}

/// Returns true if \p NumElements is a valid matrix dimension.
static constexpr bool isDimensionValid(size_t NumElements) {
  return NumElements > 0 && NumElements <= MaxElementsPerDimension;
}

/// Returns the maximum number of elements per dimension.
static constexpr unsigned getMaxElementsPerDimension() {
  return MaxElementsPerDimension;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType(), getNumRows(), getNumColumns(),
          getTypeClass());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType,
                    unsigned NumRows, unsigned NumColumns,
                    TypeClass TypeClass) {
  ID.AddPointer(ElementType.getAsOpaquePtr());
  ID.AddInteger(NumRows);
  ID.AddInteger(NumColumns);
  ID.AddInteger(TypeClass);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == ConstantMatrix;
}
3508};

3510/// Represents a matrix type where the type and the number of rows and columns
3511/// is dependent on a template.
3512class DependentSizedMatrixType final : public MatrixType {
friend class ASTContext;

const ASTContext &Context;
Expr *RowExpr;
Expr *ColumnExpr;

SourceLocation loc;

DependentSizedMatrixType(const ASTContext &Context, QualType ElementType,
                         QualType CanonicalType, Expr *RowExpr,
                         Expr *ColumnExpr, SourceLocation loc);

3525public:
QualType getElementType() const { return ElementType; }
Expr *getRowExpr() const { return RowExpr; }
Expr *getColumnExpr() const { return ColumnExpr; }
SourceLocation getAttributeLoc() const { return loc; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentSizedMatrix;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getElementType(), getRowExpr(), getColumnExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType ElementType, Expr *RowExpr, Expr *ColumnExpr);
3544};

3546/// FunctionType - C99 6.7.5.3 - Function Declarators.  This is the common base
3547/// class of FunctionNoProtoType and FunctionProtoType.
3548class FunctionType : public Type {
// The type returned by the function.
QualType ResultType;

3552public:
/// Interesting information about a specific parameter that can't simply
/// be reflected in parameter's type. This is only used by FunctionProtoType
/// but is in FunctionType to make this class available during the
/// specification of the bases of FunctionProtoType.
///
/// It makes sense to model language features this way when there's some
/// sort of parameter-specific override (such as an attribute) that
/// affects how the function is called.  For example, the ARC ns_consumed
/// attribute changes whether a parameter is passed at +0 (the default)
/// or +1 (ns_consumed).  This must be reflected in the function type,
/// but isn't really a change to the parameter type.
///
/// One serious disadvantage of modelling language features this way is
/// that they generally do not work with language features that attempt
/// to destructure types.  For example, template argument deduction will
/// not be able to match a parameter declared as
///   T (*)(U)
/// against an argument of type
///   void (*)(__attribute__((ns_consumed)) id)
/// because the substitution of T=void, U=id into the former will
/// not produce the latter.
class ExtParameterInfo {
  enum {
    ABIMask = 0x0F,
    IsConsumed = 0x10,
    HasPassObjSize = 0x20,
    IsNoEscape = 0x40,
  };
  unsigned char Data = 0;

public:
  ExtParameterInfo() = default;

  /// Return the ABI treatment of this parameter.
  ParameterABI getABI() const { return ParameterABI(Data & ABIMask); }
  ExtParameterInfo withABI(ParameterABI kind) const {
    ExtParameterInfo copy = *this;
    copy.Data = (copy.Data & ~ABIMask) | unsigned(kind);
    return copy;
  }

  /// Is this parameter considered "consumed" by Objective-C ARC?
  /// Consumed parameters must have retainable object type.
  bool isConsumed() const { return (Data & IsConsumed); }
  ExtParameterInfo withIsConsumed(bool consumed) const {
    ExtParameterInfo copy = *this;
    if (consumed)
      copy.Data |= IsConsumed;
    else
      copy.Data &= ~IsConsumed;
    return copy;
  }

  bool hasPassObjectSize() const { return Data & HasPassObjSize; }
  ExtParameterInfo withHasPassObjectSize() const {
    ExtParameterInfo Copy = *this;
    Copy.Data |= HasPassObjSize;
    return Copy;
  }

  bool isNoEscape() const { return Data & IsNoEscape; }
  ExtParameterInfo withIsNoEscape(bool NoEscape) const {
    ExtParameterInfo Copy = *this;
    if (NoEscape)
      Copy.Data |= IsNoEscape;
    else
      Copy.Data &= ~IsNoEscape;
    return Copy;
  }

  unsigned char getOpaqueValue() const { return Data; }
  static ExtParameterInfo getFromOpaqueValue(unsigned char data) {
    ExtParameterInfo result;
    result.Data = data;
    return result;
  }

  friend bool operator==(ExtParameterInfo lhs, ExtParameterInfo rhs) {
    return lhs.Data == rhs.Data;
  }

  friend bool operator!=(ExtParameterInfo lhs, ExtParameterInfo rhs) {
    return lhs.Data != rhs.Data;
  }
};

/// A class which abstracts out some details necessary for
/// making a call.
///
/// It is not actually used directly for storing this information in
/// a FunctionType, although FunctionType does currently use the
/// same bit-pattern.
///
// If you add a field (say Foo), other than the obvious places (both,
// constructors, compile failures), what you need to update is
// * Operator==
// * getFoo
// * withFoo
// * functionType. Add Foo, getFoo.
// * ASTContext::getFooType
// * ASTContext::mergeFunctionTypes
// * FunctionNoProtoType::Profile
// * FunctionProtoType::Profile
// * TypePrinter::PrintFunctionProto
// * AST read and write
// * Codegen
class ExtInfo {
  friend class FunctionType;

  // Feel free to rearrange or add bits, but if you go over 16, you'll need to
  // adjust the Bits field below, and if you add bits, you'll need to adjust
  // Type::FunctionTypeBitfields::ExtInfo as well.

  // |  CC  |noreturn|produces|nocallersavedregs|regparm|nocfcheck|cmsenscall|
  // |0 .. 4|   5    |    6   |       7         |8 .. 10|    11   |    12    |
  //
  // regparm is either 0 (no regparm attribute) or the regparm value+1.
  enum { CallConvMask = 0x1F };
  enum { NoReturnMask = 0x20 };
  enum { ProducesResultMask = 0x40 };
  enum { NoCallerSavedRegsMask = 0x80 };
  enum {
    RegParmMask =  0x700,
    RegParmOffset = 8
  };
  enum { NoCfCheckMask = 0x800 };
  enum { CmseNSCallMask = 0x1000 };
  uint16_t Bits = CC_C;

  ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {}

public:
  // Constructor with no defaults. Use this when you know that you
  // have all the elements (when reading an AST file for example).
  ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc,
          bool producesResult, bool noCallerSavedRegs, bool NoCfCheck,
          bool cmseNSCall) {
    assert((!hasRegParm || regParm < 7) && "Invalid regparm value")((void)0);
    Bits = ((unsigned)cc) | (noReturn ? NoReturnMask : 0) |
           (producesResult ? ProducesResultMask : 0) |
           (noCallerSavedRegs ? NoCallerSavedRegsMask : 0) |
           (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0) |
           (NoCfCheck ? NoCfCheckMask : 0) |
           (cmseNSCall ? CmseNSCallMask : 0);
  }

  // Constructor with all defaults. Use when for example creating a
  // function known to use defaults.
  ExtInfo() = default;

  // Constructor with just the calling convention, which is an important part
  // of the canonical type.
  ExtInfo(CallingConv CC) : Bits(CC) {}

  bool getNoReturn() const { return Bits & NoReturnMask; }
  bool getProducesResult() const { return Bits & ProducesResultMask; }
  bool getCmseNSCall() const { return Bits & CmseNSCallMask; }
  bool getNoCallerSavedRegs() const { return Bits & NoCallerSavedRegsMask; }
  bool getNoCfCheck() const { return Bits & NoCfCheckMask; }
  bool getHasRegParm() const { return ((Bits & RegParmMask) >> RegParmOffset) != 0; }

  unsigned getRegParm() const {
    unsigned RegParm = (Bits & RegParmMask) >> RegParmOffset;
    if (RegParm > 0)
      --RegParm;
    return RegParm;
  }

  CallingConv getCC() const { return CallingConv(Bits & CallConvMask); }

  bool operator==(ExtInfo Other) const {
    return Bits == Other.Bits;
  }
  bool operator!=(ExtInfo Other) const {
    return Bits != Other.Bits;
  }

  // Note that we don't have setters. That is by design, use
  // the following with methods instead of mutating these objects.

  ExtInfo withNoReturn(bool noReturn) const {
    if (noReturn)
      return ExtInfo(Bits | NoReturnMask);
    else
      return ExtInfo(Bits & ~NoReturnMask);
  }

  ExtInfo withProducesResult(bool producesResult) const {
    if (producesResult)
      return ExtInfo(Bits | ProducesResultMask);
    else
      return ExtInfo(Bits & ~ProducesResultMask);
  }

  ExtInfo withCmseNSCall(bool cmseNSCall) const {
    if (cmseNSCall)
      return ExtInfo(Bits | CmseNSCallMask);
    else
      return ExtInfo(Bits & ~CmseNSCallMask);
  }

  ExtInfo withNoCallerSavedRegs(bool noCallerSavedRegs) const {
    if (noCallerSavedRegs)
      return ExtInfo(Bits | NoCallerSavedRegsMask);
    else
      return ExtInfo(Bits & ~NoCallerSavedRegsMask);
  }

  ExtInfo withNoCfCheck(bool noCfCheck) const {
    if (noCfCheck)
      return ExtInfo(Bits | NoCfCheckMask);
    else
      return ExtInfo(Bits & ~NoCfCheckMask);
  }

  ExtInfo withRegParm(unsigned RegParm) const {
    assert(RegParm < 7 && "Invalid regparm value")((void)0);
    return ExtInfo((Bits & ~RegParmMask) |
                   ((RegParm + 1) << RegParmOffset));
  }

  ExtInfo withCallingConv(CallingConv cc) const {
    return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc);
  }

  void Profile(llvm::FoldingSetNodeID &ID) const {
    ID.AddInteger(Bits);
  }
};

/// A simple holder for a QualType representing a type in an
/// exception specification. Unfortunately needed by FunctionProtoType
/// because TrailingObjects cannot handle repeated types.
struct ExceptionType { QualType Type; };

/// A simple holder for various uncommon bits which do not fit in
/// FunctionTypeBitfields. Aligned to alignof(void *) to maintain the
/// alignment of subsequent objects in TrailingObjects. You must update
/// hasExtraBitfields in FunctionProtoType after adding extra data here.
struct alignas(void *) FunctionTypeExtraBitfields {
  /// The number of types in the exception specification.
  /// A whole unsigned is not needed here and according to
  /// [implimits] 8 bits would be enough here.
  unsigned NumExceptionType;
};

3799protected:
FunctionType(TypeClass tc, QualType res, QualType Canonical,
             TypeDependence Dependence, ExtInfo Info)
    : Type(tc, Canonical, Dependence), ResultType(res) {
  FunctionTypeBits.ExtInfo = Info.Bits;
}

Qualifiers getFastTypeQuals() const {
  return Qualifiers::fromFastMask(FunctionTypeBits.FastTypeQuals);
}

3810public:
QualType getReturnType() const { return ResultType; }

bool getHasRegParm() const { return getExtInfo().getHasRegParm(); }
unsigned getRegParmType() const { return getExtInfo().getRegParm(); }

/// Determine whether this function type includes the GNU noreturn
/// attribute. The C++11 [[noreturn]] attribute does not affect the function
/// type.
bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); }

bool getCmseNSCallAttr() const { return getExtInfo().getCmseNSCall(); }
CallingConv getCallConv() const { return getExtInfo().getCC(); }
ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); }

static_assert((~Qualifiers::FastMask & Qualifiers::CVRMask) == 0,
              "Const, volatile and restrict are assumed to be a subset of "
              "the fast qualifiers.");

bool isConst() const { return getFastTypeQuals().hasConst(); }
bool isVolatile() const { return getFastTypeQuals().hasVolatile(); }
bool isRestrict() const { return getFastTypeQuals().hasRestrict(); }

/// Determine the type of an expression that calls a function of
/// this type.
QualType getCallResultType(const ASTContext &Context) const {
  return getReturnType().getNonLValueExprType(Context);
}

static StringRef getNameForCallConv(CallingConv CC);

static bool classof(const Type *T) {
  return T->getTypeClass() == FunctionNoProto ||
         T->getTypeClass() == FunctionProto;
}
3845};

3847/// Represents a K&R-style 'int foo()' function, which has
3848/// no information available about its arguments.
3849class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info)
    : FunctionType(FunctionNoProto, Result, Canonical,
                   Result->getDependence() &
                       ~(TypeDependence::DependentInstantiation |
                         TypeDependence::UnexpandedPack),
                   Info) {}

3859public:
// No additional state past what FunctionType provides.

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getReturnType(), getExtInfo());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType,
                    ExtInfo Info) {
  Info.Profile(ID);
  ID.AddPointer(ResultType.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == FunctionNoProto;
}
3878};

3880/// Represents a prototype with parameter type info, e.g.
3881/// 'int foo(int)' or 'int foo(void)'.  'void' is represented as having no
3882/// parameters, not as having a single void parameter. Such a type can have
3883/// an exception specification, but this specification is not part of the
3884/// canonical type. FunctionProtoType has several trailing objects, some of
3885/// which optional. For more information about the trailing objects see
3886/// the first comment inside FunctionProtoType.
3887class FunctionProtoType final
  : public FunctionType,
    public llvm::FoldingSetNode,
    private llvm::TrailingObjects<
        FunctionProtoType, QualType, SourceLocation,
        FunctionType::FunctionTypeExtraBitfields, FunctionType::ExceptionType,
        Expr *, FunctionDecl *, FunctionType::ExtParameterInfo, Qualifiers> {
friend class ASTContext; // ASTContext creates these.
friend TrailingObjects;

// FunctionProtoType is followed by several trailing objects, some of
// which optional. They are in order:
//
// * An array of getNumParams() QualType holding the parameter types.
//   Always present. Note that for the vast majority of FunctionProtoType,
//   these will be the only trailing objects.
//
// * Optionally if the function is variadic, the SourceLocation of the
//   ellipsis.
//
// * Optionally if some extra data is stored in FunctionTypeExtraBitfields
//   (see FunctionTypeExtraBitfields and FunctionTypeBitfields):
//   a single FunctionTypeExtraBitfields. Present if and only if
//   hasExtraBitfields() is true.
//
// * Optionally exactly one of:
//   * an array of getNumExceptions() ExceptionType,
//   * a single Expr *,
//   * a pair of FunctionDecl *,
//   * a single FunctionDecl *
//   used to store information about the various types of exception
//   specification. See getExceptionSpecSize for the details.
//
// * Optionally an array of getNumParams() ExtParameterInfo holding
//   an ExtParameterInfo for each of the parameters. Present if and
//   only if hasExtParameterInfos() is true.
//
// * Optionally a Qualifiers object to represent extra qualifiers that can't
//   be represented by FunctionTypeBitfields.FastTypeQuals. Present if and only
//   if hasExtQualifiers() is true.
//
// The optional FunctionTypeExtraBitfields has to be before the data
// related to the exception specification since it contains the number
// of exception types.
//
// We put the ExtParameterInfos last.  If all were equal, it would make
// more sense to put these before the exception specification, because
// it's much easier to skip past them compared to the elaborate switch
// required to skip the exception specification.  However, all is not
// equal; ExtParameterInfos are used to model very uncommon features,
// and it's better not to burden the more common paths.

3939public:
/// Holds information about the various types of exception specification.
/// ExceptionSpecInfo is not stored as such in FunctionProtoType but is
/// used to group together the various bits of information about the
/// exception specification.
struct ExceptionSpecInfo {
  /// The kind of exception specification this is.
  ExceptionSpecificationType Type = EST_None;

  /// Explicitly-specified list of exception types.
  ArrayRef<QualType> Exceptions;

  /// Noexcept expression, if this is a computed noexcept specification.
  Expr *NoexceptExpr = nullptr;

  /// The function whose exception specification this is, for
  /// EST_Unevaluated and EST_Uninstantiated.
  FunctionDecl *SourceDecl = nullptr;

  /// The function template whose exception specification this is instantiated
  /// from, for EST_Uninstantiated.
  FunctionDecl *SourceTemplate = nullptr;

  ExceptionSpecInfo() = default;

  ExceptionSpecInfo(ExceptionSpecificationType EST) : Type(EST) {}
};

/// Extra information about a function prototype. ExtProtoInfo is not
/// stored as such in FunctionProtoType but is used to group together
/// the various bits of extra information about a function prototype.
struct ExtProtoInfo {
  FunctionType::ExtInfo ExtInfo;
  bool Variadic : 1;
  bool HasTrailingReturn : 1;
  Qualifiers TypeQuals;
  RefQualifierKind RefQualifier = RQ_None;
  ExceptionSpecInfo ExceptionSpec;
  const ExtParameterInfo *ExtParameterInfos = nullptr;
  SourceLocation EllipsisLoc;

  ExtProtoInfo() : Variadic(false), HasTrailingReturn(false) {}

  ExtProtoInfo(CallingConv CC)
      : ExtInfo(CC), Variadic(false), HasTrailingReturn(false) {}

  ExtProtoInfo withExceptionSpec(const ExceptionSpecInfo &ESI) {
    ExtProtoInfo Result(*this);
    Result.ExceptionSpec = ESI;
    return Result;
  }
};

3992private:
unsigned numTrailingObjects(OverloadToken<QualType>) const {
  return getNumParams();
}

unsigned numTrailingObjects(OverloadToken<SourceLocation>) const {
  return isVariadic();
}

unsigned numTrailingObjects(OverloadToken<FunctionTypeExtraBitfields>) const {
  return hasExtraBitfields();
}

unsigned numTrailingObjects(OverloadToken<ExceptionType>) const {
  return getExceptionSpecSize().NumExceptionType;
}

unsigned numTrailingObjects(OverloadToken<Expr *>) const {
  return getExceptionSpecSize().NumExprPtr;
}

unsigned numTrailingObjects(OverloadToken<FunctionDecl *>) const {
  return getExceptionSpecSize().NumFunctionDeclPtr;
}

unsigned numTrailingObjects(OverloadToken<ExtParameterInfo>) const {
  return hasExtParameterInfos() ? getNumParams() : 0;
}

/// Determine whether there are any argument types that
/// contain an unexpanded parameter pack.
static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray,
                                               unsigned numArgs) {
  for (unsigned Idx = 0; Idx < numArgs; ++Idx)
    if (ArgArray[Idx]->containsUnexpandedParameterPack())
      return true;

  return false;
}

FunctionProtoType(QualType result, ArrayRef<QualType> params,
                  QualType canonical, const ExtProtoInfo &epi);

/// This struct is returned by getExceptionSpecSize and is used to
/// translate an ExceptionSpecificationType to the number and kind
/// of trailing objects related to the exception specification.
struct ExceptionSpecSizeHolder {
  unsigned NumExceptionType;
  unsigned NumExprPtr;
  unsigned NumFunctionDeclPtr;
};

/// Return the number and kind of trailing objects
/// related to the exception specification.
static ExceptionSpecSizeHolder
getExceptionSpecSize(ExceptionSpecificationType EST, unsigned NumExceptions) {
  switch (EST) {
  case EST_None:
  case EST_DynamicNone:
  case EST_MSAny:
  case EST_BasicNoexcept:
  case EST_Unparsed:
  case EST_NoThrow:
    return {0, 0, 0};

  case EST_Dynamic:
    return {NumExceptions, 0, 0};

  case EST_DependentNoexcept:
  case EST_NoexceptFalse:
  case EST_NoexceptTrue:
    return {0, 1, 0};

  case EST_Uninstantiated:
    return {0, 0, 2};

  case EST_Unevaluated:
    return {0, 0, 1};
  }
  llvm_unreachable("bad exception specification kind")__builtin_unreachable();
}

/// Return the number and kind of trailing objects
/// related to the exception specification.
ExceptionSpecSizeHolder getExceptionSpecSize() const {
  return getExceptionSpecSize(getExceptionSpecType(), getNumExceptions());
}

/// Whether the trailing FunctionTypeExtraBitfields is present.
static bool hasExtraBitfields(ExceptionSpecificationType EST) {
  // If the exception spec type is EST_Dynamic then we have > 0 exception
  // types and the exact number is stored in FunctionTypeExtraBitfields.
  return EST == EST_Dynamic;
}

/// Whether the trailing FunctionTypeExtraBitfields is present.
bool hasExtraBitfields() const {
  return hasExtraBitfields(getExceptionSpecType());
}

bool hasExtQualifiers() const {
  return FunctionTypeBits.HasExtQuals;
}

4096public:
unsigned getNumParams() const { return FunctionTypeBits.NumParams; }

QualType getParamType(unsigned i) const {
  assert(i < getNumParams() && "invalid parameter index")((void)0);
  return param_type_begin()[i];
}

ArrayRef<QualType> getParamTypes() const {
  return llvm::makeArrayRef(param_type_begin(), param_type_end());
}

ExtProtoInfo getExtProtoInfo() const {
  ExtProtoInfo EPI;
  EPI.ExtInfo = getExtInfo();
  EPI.Variadic = isVariadic();
  EPI.EllipsisLoc = getEllipsisLoc();
  EPI.HasTrailingReturn = hasTrailingReturn();
  EPI.ExceptionSpec = getExceptionSpecInfo();
  EPI.TypeQuals = getMethodQuals();
  EPI.RefQualifier = getRefQualifier();
  EPI.ExtParameterInfos = getExtParameterInfosOrNull();
  return EPI;
}

/// Get the kind of exception specification on this function.
ExceptionSpecificationType getExceptionSpecType() const {
  return static_cast<ExceptionSpecificationType>(
      FunctionTypeBits.ExceptionSpecType);
}

/// Return whether this function has any kind of exception spec.
bool hasExceptionSpec() const { return getExceptionSpecType() != EST_None; }

/// Return whether this function has a dynamic (throw) exception spec.
bool hasDynamicExceptionSpec() const {
  return isDynamicExceptionSpec(getExceptionSpecType());
}

/// Return whether this function has a noexcept exception spec.
bool hasNoexceptExceptionSpec() const {
  return isNoexceptExceptionSpec(getExceptionSpecType());
}

/// Return whether this function has a dependent exception spec.
bool hasDependentExceptionSpec() const;

/// Return whether this function has an instantiation-dependent exception
/// spec.
bool hasInstantiationDependentExceptionSpec() const;

/// Return all the available information about this type's exception spec.
ExceptionSpecInfo getExceptionSpecInfo() const {
  ExceptionSpecInfo Result;
  Result.Type = getExceptionSpecType();
  if (Result.Type == EST_Dynamic) {
    Result.Exceptions = exceptions();
  } else if (isComputedNoexcept(Result.Type)) {
    Result.NoexceptExpr = getNoexceptExpr();
  } else if (Result.Type == EST_Uninstantiated) {
    Result.SourceDecl = getExceptionSpecDecl();
    Result.SourceTemplate = getExceptionSpecTemplate();
  } else if (Result.Type == EST_Unevaluated) {
    Result.SourceDecl = getExceptionSpecDecl();
  }
  return Result;
}

/// Return the number of types in the exception specification.
unsigned getNumExceptions() const {
  return getExceptionSpecType() == EST_Dynamic
             ? getTrailingObjects<FunctionTypeExtraBitfields>()
                   ->NumExceptionType
             : 0;
}

/// Return the ith exception type, where 0 <= i < getNumExceptions().
QualType getExceptionType(unsigned i) const {
  assert(i < getNumExceptions() && "Invalid exception number!")((void)0);
  return exception_begin()[i];
}

/// Return the expression inside noexcept(expression), or a null pointer
/// if there is none (because the exception spec is not of this form).
Expr *getNoexceptExpr() const {
  if (!isComputedNoexcept(getExceptionSpecType()))
    return nullptr;
  return *getTrailingObjects<Expr *>();
}

/// If this function type has an exception specification which hasn't
/// been determined yet (either because it has not been evaluated or because
/// it has not been instantiated), this is the function whose exception
/// specification is represented by this type.
FunctionDecl *getExceptionSpecDecl() const {
  if (getExceptionSpecType() != EST_Uninstantiated &&
      getExceptionSpecType() != EST_Unevaluated)
    return nullptr;
  return getTrailingObjects<FunctionDecl *>()[0];
}

/// If this function type has an uninstantiated exception
/// specification, this is the function whose exception specification
/// should be instantiated to find the exception specification for
/// this type.
FunctionDecl *getExceptionSpecTemplate() const {
  if (getExceptionSpecType() != EST_Uninstantiated)
    return nullptr;
  return getTrailingObjects<FunctionDecl *>()[1];
}

/// Determine whether this function type has a non-throwing exception
/// specification.
CanThrowResult canThrow() const;

/// Determine whether this function type has a non-throwing exception
/// specification. If this depends on template arguments, returns
/// \c ResultIfDependent.
bool isNothrow(bool ResultIfDependent = false) const {
  return ResultIfDependent ? canThrow() != CT_Can : canThrow() == CT_Cannot;
}

/// Whether this function prototype is variadic.
bool isVariadic() const { return FunctionTypeBits.Variadic; }

SourceLocation getEllipsisLoc() const {
  return isVariadic() ? *getTrailingObjects<SourceLocation>()
                      : SourceLocation();
}

/// Determines whether this function prototype contains a
/// parameter pack at the end.
///
/// A function template whose last parameter is a parameter pack can be
/// called with an arbitrary number of arguments, much like a variadic
/// function.
bool isTemplateVariadic() const;

/// Whether this function prototype has a trailing return type.
bool hasTrailingReturn() const { return FunctionTypeBits.HasTrailingReturn; }

Qualifiers getMethodQuals() const {
  if (hasExtQualifiers())
    return *getTrailingObjects<Qualifiers>();
  else
    return getFastTypeQuals();
}

/// Retrieve the ref-qualifier associated with this function type.
RefQualifierKind getRefQualifier() const {
  return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier);
}

using param_type_iterator = const QualType *;
using param_type_range = llvm::iterator_range<param_type_iterator>;

param_type_range param_types() const {
  return param_type_range(param_type_begin(), param_type_end());
}

param_type_iterator param_type_begin() const {
  return getTrailingObjects<QualType>();
}

param_type_iterator param_type_end() const {
  return param_type_begin() + getNumParams();
}

using exception_iterator = const QualType *;

ArrayRef<QualType> exceptions() const {
  return llvm::makeArrayRef(exception_begin(), exception_end());
}

exception_iterator exception_begin() const {
  return reinterpret_cast<exception_iterator>(
      getTrailingObjects<ExceptionType>());
}

exception_iterator exception_end() const {
  return exception_begin() + getNumExceptions();
}

/// Is there any interesting extra information for any of the parameters
/// of this function type?
bool hasExtParameterInfos() const {
  return FunctionTypeBits.HasExtParameterInfos;
}

ArrayRef<ExtParameterInfo> getExtParameterInfos() const {
  assert(hasExtParameterInfos())((void)0);
  return ArrayRef<ExtParameterInfo>(getTrailingObjects<ExtParameterInfo>(),
                                    getNumParams());
}

/// Return a pointer to the beginning of the array of extra parameter
/// information, if present, or else null if none of the parameters
/// carry it.  This is equivalent to getExtProtoInfo().ExtParameterInfos.
const ExtParameterInfo *getExtParameterInfosOrNull() const {
  if (!hasExtParameterInfos())
    return nullptr;
  return getTrailingObjects<ExtParameterInfo>();
}

ExtParameterInfo getExtParameterInfo(unsigned I) const {
  assert(I < getNumParams() && "parameter index out of range")((void)0);
  if (hasExtParameterInfos())
    return getTrailingObjects<ExtParameterInfo>()[I];
  return ExtParameterInfo();
}

ParameterABI getParameterABI(unsigned I) const {
  assert(I < getNumParams() && "parameter index out of range")((void)0);
  if (hasExtParameterInfos())
    return getTrailingObjects<ExtParameterInfo>()[I].getABI();
  return ParameterABI::Ordinary;
}

bool isParamConsumed(unsigned I) const {
  assert(I < getNumParams() && "parameter index out of range")((void)0);
  if (hasExtParameterInfos())
    return getTrailingObjects<ExtParameterInfo>()[I].isConsumed();
  return false;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void printExceptionSpecification(raw_ostream &OS,
                                 const PrintingPolicy &Policy) const;

static bool classof(const Type *T) {
  return T->getTypeClass() == FunctionProto;
}

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx);
static void Profile(llvm::FoldingSetNodeID &ID, QualType Result,
                    param_type_iterator ArgTys, unsigned NumArgs,
                    const ExtProtoInfo &EPI, const ASTContext &Context,
                    bool Canonical);
4336};

4338/// Represents the dependent type named by a dependently-scoped
4339/// typename using declaration, e.g.
4340///   using typename Base<T>::foo;
4341///
4342/// Template instantiation turns these into the underlying type.
4343class UnresolvedUsingType : public Type {
friend class ASTContext; // ASTContext creates these.

UnresolvedUsingTypenameDecl *Decl;

UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D)
    : Type(UnresolvedUsing, QualType(),
           TypeDependence::DependentInstantiation),
      Decl(const_cast<UnresolvedUsingTypenameDecl *>(D)) {}

4353public:
UnresolvedUsingTypenameDecl *getDecl() const { return Decl; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == UnresolvedUsing;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  return Profile(ID, Decl);
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    UnresolvedUsingTypenameDecl *D) {
  ID.AddPointer(D);
}
4371};

4373class TypedefType : public Type {
TypedefNameDecl *Decl;

4376private:
friend class ASTContext; // ASTContext creates these.

TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType underlying,
            QualType can);

4382public:
TypedefNameDecl *getDecl() const { return Decl; }

bool isSugared() const { return true; }
QualType desugar() const;

static bool classof(const Type *T) { return T->getTypeClass() == Typedef; }
4389};

4391/// Sugar type that represents a type that was qualified by a qualifier written
4392/// as a macro invocation.
4393class MacroQualifiedType : public Type {
friend class ASTContext; // ASTContext creates these.

QualType UnderlyingTy;
const IdentifierInfo *MacroII;

MacroQualifiedType(QualType UnderlyingTy, QualType CanonTy,
                   const IdentifierInfo *MacroII)
    : Type(MacroQualified, CanonTy, UnderlyingTy->getDependence()),
      UnderlyingTy(UnderlyingTy), MacroII(MacroII) {
  assert(isa<AttributedType>(UnderlyingTy) &&((void)0)
         "Expected a macro qualified type to only wrap attributed types.")((void)0);
}

4407public:
const IdentifierInfo *getMacroIdentifier() const { return MacroII; }
QualType getUnderlyingType() const { return UnderlyingTy; }

/// Return this attributed type's modified type with no qualifiers attached to
/// it.
QualType getModifiedType() const;

bool isSugared() const { return true; }
QualType desugar() const;

static bool classof(const Type *T) {
  return T->getTypeClass() == MacroQualified;
}
4421};

4423/// Represents a `typeof` (or __typeof__) expression (a GCC extension).
4424class TypeOfExprType : public Type {
Expr *TOExpr;

4427protected:
friend class ASTContext; // ASTContext creates these.

TypeOfExprType(Expr *E, QualType can = QualType());

4432public:
Expr *getUnderlyingExpr() const { return TOExpr; }

/// Remove a single level of sugar.
QualType desugar() const;

/// Returns whether this type directly provides sugar.
bool isSugared() const;

static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; }
4442};

4444/// Internal representation of canonical, dependent
4445/// `typeof(expr)` types.
4446///
4447/// This class is used internally by the ASTContext to manage
4448/// canonical, dependent types, only. Clients will only see instances
4449/// of this class via TypeOfExprType nodes.
4450class DependentTypeOfExprType
: public TypeOfExprType, public llvm::FoldingSetNode {
const ASTContext &Context;

4454public:
DependentTypeOfExprType(const ASTContext &Context, Expr *E)
    : TypeOfExprType(E), Context(Context) {}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getUnderlyingExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    Expr *E);
4464};

4466/// Represents `typeof(type)`, a GCC extension.
4467class TypeOfType : public Type {
friend class ASTContext; // ASTContext creates these.

QualType TOType;

TypeOfType(QualType T, QualType can)
    : Type(TypeOf, can, T->getDependence()), TOType(T) {
  assert(!isa<TypedefType>(can) && "Invalid canonical type")((void)0);
}

4477public:
QualType getUnderlyingType() const { return TOType; }

/// Remove a single level of sugar.
QualType desugar() const { return getUnderlyingType(); }

/// Returns whether this type directly provides sugar.
bool isSugared() const { return true; }

static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; }
4487};

4489/// Represents the type `decltype(expr)` (C++11).
4490class DecltypeType : public Type {
Expr *E;
QualType UnderlyingType;

4494protected:
friend class ASTContext; // ASTContext creates these.

DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType());

4499public:
Expr *getUnderlyingExpr() const { return E; }
QualType getUnderlyingType() const { return UnderlyingType; }

/// Remove a single level of sugar.
QualType desugar() const;

/// Returns whether this type directly provides sugar.
bool isSugared() const;

static bool classof(const Type *T) { return T->getTypeClass() == Decltype; }
4510};

4512/// Internal representation of canonical, dependent
4513/// decltype(expr) types.
4514///
4515/// This class is used internally by the ASTContext to manage
4516/// canonical, dependent types, only. Clients will only see instances
4517/// of this class via DecltypeType nodes.
4518class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode {
const ASTContext &Context;

4521public:
DependentDecltypeType(const ASTContext &Context, Expr *E);

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, getUnderlyingExpr());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    Expr *E);
4530};

4532/// A unary type transform, which is a type constructed from another.
4533class UnaryTransformType : public Type {
4534public:
enum UTTKind {
  EnumUnderlyingType
};

4539private:
/// The untransformed type.
QualType BaseType;

/// The transformed type if not dependent, otherwise the same as BaseType.
QualType UnderlyingType;

UTTKind UKind;

4548protected:
friend class ASTContext;

UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind,
                   QualType CanonicalTy);

4554public:
bool isSugared() const { return !isDependentType(); }
QualType desugar() const { return UnderlyingType; }

QualType getUnderlyingType() const { return UnderlyingType; }
QualType getBaseType() const { return BaseType; }

UTTKind getUTTKind() const { return UKind; }

static bool classof(const Type *T) {
  return T->getTypeClass() == UnaryTransform;
}
4566};

4568/// Internal representation of canonical, dependent
4569/// __underlying_type(type) types.
4570///
4571/// This class is used internally by the ASTContext to manage
4572/// canonical, dependent types, only. Clients will only see instances
4573/// of this class via UnaryTransformType nodes.
4574class DependentUnaryTransformType : public UnaryTransformType,
                                  public llvm::FoldingSetNode {
4576public:
DependentUnaryTransformType(const ASTContext &C, QualType BaseType,
                            UTTKind UKind);

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getBaseType(), getUTTKind());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType,
                    UTTKind UKind) {
  ID.AddPointer(BaseType.getAsOpaquePtr());
  ID.AddInteger((unsigned)UKind);
}
4589};

4591class TagType : public Type {
friend class ASTReader;
template <class T> friend class serialization::AbstractTypeReader;

/// Stores the TagDecl associated with this type. The decl may point to any
/// TagDecl that declares the entity.
TagDecl *decl;

4599protected:
TagType(TypeClass TC, const TagDecl *D, QualType can);

4602public:
TagDecl *getDecl() const;

/// Determines whether this type is in the process of being defined.
bool isBeingDefined() const;

static bool classof(const Type *T) {
  return T->getTypeClass() == Enum || T->getTypeClass() == Record;
}
4611};

4613/// A helper class that allows the use of isa/cast/dyncast
4614/// to detect TagType objects of structs/unions/classes.
4615class RecordType : public TagType {
4616protected:
friend class ASTContext; // ASTContext creates these.

explicit RecordType(const RecordDecl *D)
    : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) {}
explicit RecordType(TypeClass TC, RecordDecl *D)
    : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) {}

4624public:
RecordDecl *getDecl() const {
  return reinterpret_cast<RecordDecl*>(TagType::getDecl());
}

/// Recursively check all fields in the record for const-ness. If any field
/// is declared const, return true. Otherwise, return false.
bool hasConstFields() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) { return T->getTypeClass() == Record; }
4637};

4639/// A helper class that allows the use of isa/cast/dyncast
4640/// to detect TagType objects of enums.
4641class EnumType : public TagType {
friend class ASTContext; // ASTContext creates these.

explicit EnumType(const EnumDecl *D)
    : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) {}

4647public:
EnumDecl *getDecl() const {
  return reinterpret_cast<EnumDecl*>(TagType::getDecl());
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) { return T->getTypeClass() == Enum; }
4656};

4658/// An attributed type is a type to which a type attribute has been applied.
4659///
4660/// The "modified type" is the fully-sugared type to which the attributed
4661/// type was applied; generally it is not canonically equivalent to the
4662/// attributed type. The "equivalent type" is the minimally-desugared type
4663/// which the type is canonically equivalent to.
4664///
4665/// For example, in the following attributed type:
4666///     int32_t __attribute__((vector_size(16)))
4667///   - the modified type is the TypedefType for int32_t
4668///   - the equivalent type is VectorType(16, int32_t)
4669///   - the canonical type is VectorType(16, int)
4670class AttributedType : public Type, public llvm::FoldingSetNode {
4671public:
using Kind = attr::Kind;

4674private:
friend class ASTContext; // ASTContext creates these

QualType ModifiedType;
QualType EquivalentType;

AttributedType(QualType canon, attr::Kind attrKind, QualType modified,
               QualType equivalent)
    : Type(Attributed, canon, equivalent->getDependence()),
      ModifiedType(modified), EquivalentType(equivalent) {
  AttributedTypeBits.AttrKind = attrKind;
}

4687public:
Kind getAttrKind() const {
  return static_cast<Kind>(AttributedTypeBits.AttrKind);
}

QualType getModifiedType() const { return ModifiedType; }
QualType getEquivalentType() const { return EquivalentType; }

bool isSugared() const { return true; }
QualType desugar() const { return getEquivalentType(); }

/// Does this attribute behave like a type qualifier?
///
/// A type qualifier adjusts a type to provide specialized rules for
/// a specific object, like the standard const and volatile qualifiers.
/// This includes attributes controlling things like nullability,
/// address spaces, and ARC ownership.  The value of the object is still
/// largely described by the modified type.
///
/// In contrast, many type attributes "rewrite" their modified type to
/// produce a fundamentally different type, not necessarily related in any
/// formalizable way to the original type.  For example, calling convention
/// and vector attributes are not simple type qualifiers.
///
/// Type qualifiers are often, but not always, reflected in the canonical
/// type.
bool isQualifier() const;

bool isMSTypeSpec() const;

bool isCallingConv() const;

llvm::Optional<NullabilityKind> getImmediateNullability() const;

/// Retrieve the attribute kind corresponding to the given
/// nullability kind.
static Kind getNullabilityAttrKind(NullabilityKind kind) {
  switch (kind) {
  case NullabilityKind::NonNull:
    return attr::TypeNonNull;

  case NullabilityKind::Nullable:
    return attr::TypeNullable;

  case NullabilityKind::NullableResult:
    return attr::TypeNullableResult;

  case NullabilityKind::Unspecified:
    return attr::TypeNullUnspecified;
  }
  llvm_unreachable("Unknown nullability kind.")__builtin_unreachable();
}

/// Strip off the top-level nullability annotation on the given
/// type, if it's there.
///
/// \param T The type to strip. If the type is exactly an
/// AttributedType specifying nullability (without looking through
/// type sugar), the nullability is returned and this type changed
/// to the underlying modified type.
///
/// \returns the top-level nullability, if present.
static Optional<NullabilityKind> stripOuterNullability(QualType &T);

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getAttrKind(), ModifiedType, EquivalentType);
}

static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind,
                    QualType modified, QualType equivalent) {
  ID.AddInteger(attrKind);
  ID.AddPointer(modified.getAsOpaquePtr());
  ID.AddPointer(equivalent.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Attributed;
}
4765};

4767class TemplateTypeParmType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

// Helper data collector for canonical types.
struct CanonicalTTPTInfo {
  unsigned Depth : 15;
  unsigned ParameterPack : 1;
  unsigned Index : 16;
};

union {
  // Info for the canonical type.
  CanonicalTTPTInfo CanTTPTInfo;

  // Info for the non-canonical type.
  TemplateTypeParmDecl *TTPDecl;
};

/// Build a non-canonical type.
TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon)
    : Type(TemplateTypeParm, Canon,
           TypeDependence::DependentInstantiation |
               (Canon->getDependence() & TypeDependence::UnexpandedPack)),
      TTPDecl(TTPDecl) {}

/// Build the canonical type.
TemplateTypeParmType(unsigned D, unsigned I, bool PP)
    : Type(TemplateTypeParm, QualType(this, 0),
           TypeDependence::DependentInstantiation |
               (PP ? TypeDependence::UnexpandedPack : TypeDependence::None)) {
  CanTTPTInfo.Depth = D;
  CanTTPTInfo.Index = I;
  CanTTPTInfo.ParameterPack = PP;
}

const CanonicalTTPTInfo& getCanTTPTInfo() const {
  QualType Can = getCanonicalTypeInternal();
  return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo;
}

4807public:
unsigned getDepth() const { return getCanTTPTInfo().Depth; }
unsigned getIndex() const { return getCanTTPTInfo().Index; }
bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; }

TemplateTypeParmDecl *getDecl() const {
  return isCanonicalUnqualified() ? nullptr : TTPDecl;
}

IdentifierInfo *getIdentifier() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl());
}

static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth,
                    unsigned Index, bool ParameterPack,
                    TemplateTypeParmDecl *TTPDecl) {
  ID.AddInteger(Depth);
  ID.AddInteger(Index);
  ID.AddBoolean(ParameterPack);
  ID.AddPointer(TTPDecl);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == TemplateTypeParm;
}
4837};

4839/// Represents the result of substituting a type for a template
4840/// type parameter.
4841///
4842/// Within an instantiated template, all template type parameters have
4843/// been replaced with these.  They are used solely to record that a
4844/// type was originally written as a template type parameter;
4845/// therefore they are never canonical.
4846class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

// The original type parameter.
const TemplateTypeParmType *Replaced;

SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon)
    : Type(SubstTemplateTypeParm, Canon, Canon->getDependence()),
      Replaced(Param) {}

4856public:
/// Gets the template parameter that was substituted for.
const TemplateTypeParmType *getReplacedParameter() const {
  return Replaced;
}

/// Gets the type that was substituted for the template
/// parameter.
QualType getReplacementType() const {
  return getCanonicalTypeInternal();
}

bool isSugared() const { return true; }
QualType desugar() const { return getReplacementType(); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getReplacedParameter(), getReplacementType());
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    const TemplateTypeParmType *Replaced,
                    QualType Replacement) {
  ID.AddPointer(Replaced);
  ID.AddPointer(Replacement.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == SubstTemplateTypeParm;
}
4885};

4887/// Represents the result of substituting a set of types for a template
4888/// type parameter pack.
4889///
4890/// When a pack expansion in the source code contains multiple parameter packs
4891/// and those parameter packs correspond to different levels of template
4892/// parameter lists, this type node is used to represent a template type
4893/// parameter pack from an outer level, which has already had its argument pack
4894/// substituted but that still lives within a pack expansion that itself
4895/// could not be instantiated. When actually performing a substitution into
4896/// that pack expansion (e.g., when all template parameters have corresponding
4897/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType
4898/// at the current pack substitution index.
4899class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode {
friend class ASTContext;

/// The original type parameter.
const TemplateTypeParmType *Replaced;

/// A pointer to the set of template arguments that this
/// parameter pack is instantiated with.
const TemplateArgument *Arguments;

SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param,
                              QualType Canon,
                              const TemplateArgument &ArgPack);

4913public:
IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); }

/// Gets the template parameter that was substituted for.
const TemplateTypeParmType *getReplacedParameter() const {
  return Replaced;
}

unsigned getNumArgs() const {
  return SubstTemplateTypeParmPackTypeBits.NumArgs;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

TemplateArgument getArgumentPack() const;

void Profile(llvm::FoldingSetNodeID &ID);
static void Profile(llvm::FoldingSetNodeID &ID,
                    const TemplateTypeParmType *Replaced,
                    const TemplateArgument &ArgPack);

static bool classof(const Type *T) {
  return T->getTypeClass() == SubstTemplateTypeParmPack;
}
4938};

4940/// Common base class for placeholders for types that get replaced by
4941/// placeholder type deduction: C++11 auto, C++14 decltype(auto), C++17 deduced
4942/// class template types, and constrained type names.
4943///
4944/// These types are usually a placeholder for a deduced type. However, before
4945/// the initializer is attached, or (usually) if the initializer is
4946/// type-dependent, there is no deduced type and the type is canonical. In
4947/// the latter case, it is also a dependent type.
4948class DeducedType : public Type {
4949protected:
DeducedType(TypeClass TC, QualType DeducedAsType,
            TypeDependence ExtraDependence)
    : Type(TC,
           // FIXME: Retain the sugared deduced type?
           DeducedAsType.isNull() ? QualType(this, 0)
                                  : DeducedAsType.getCanonicalType(),
           ExtraDependence | (DeducedAsType.isNull()
                                  ? TypeDependence::None
                                  : DeducedAsType->getDependence() &
                                        ~TypeDependence::VariablyModified)) {}

4961public:
bool isSugared() const { return !isCanonicalUnqualified(); }
QualType desugar() const { return getCanonicalTypeInternal(); }

/// Get the type deduced for this placeholder type, or null if it's
/// either not been deduced or was deduced to a dependent type.
QualType getDeducedType() const {
  return !isCanonicalUnqualified() ? getCanonicalTypeInternal() : QualType();
}
bool isDeduced() const {
  return !isCanonicalUnqualified() || isDependentType();
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Auto ||
         T->getTypeClass() == DeducedTemplateSpecialization;
}
4978};

4980/// Represents a C++11 auto or C++14 decltype(auto) type, possibly constrained
4981/// by a type-constraint.
4982class alignas(8) AutoType : public DeducedType, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

ConceptDecl *TypeConstraintConcept;

AutoType(QualType DeducedAsType, AutoTypeKeyword Keyword,
         TypeDependence ExtraDependence, ConceptDecl *CD,
         ArrayRef<TemplateArgument> TypeConstraintArgs);

const TemplateArgument *getArgBuffer() const {
  return reinterpret_cast<const TemplateArgument*>(this+1);
}

TemplateArgument *getArgBuffer() {
  return reinterpret_cast<TemplateArgument*>(this+1);
}

4999public:
/// Retrieve the template arguments.
const TemplateArgument *getArgs() const {
  return getArgBuffer();
}

/// Retrieve the number of template arguments.
unsigned getNumArgs() const {
  return AutoTypeBits.NumArgs;
}

const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h

ArrayRef<TemplateArgument> getTypeConstraintArguments() const {
  return {getArgs(), getNumArgs()};
}

ConceptDecl *getTypeConstraintConcept() const {
  return TypeConstraintConcept;
}

bool isConstrained() const {
  return TypeConstraintConcept != nullptr;
}

bool isDecltypeAuto() const {
  return getKeyword() == AutoTypeKeyword::DecltypeAuto;
}

AutoTypeKeyword getKeyword() const {
  return (AutoTypeKeyword)AutoTypeBits.Keyword;
}

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) {
  Profile(ID, Context, getDeducedType(), getKeyword(), isDependentType(),
          getTypeConstraintConcept(), getTypeConstraintArguments());
}

static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    QualType Deduced, AutoTypeKeyword Keyword,
                    bool IsDependent, ConceptDecl *CD,
                    ArrayRef<TemplateArgument> Arguments);

static bool classof(const Type *T) {
  return T->getTypeClass() == Auto;
}
5045};

5047/// Represents a C++17 deduced template specialization type.
5048class DeducedTemplateSpecializationType : public DeducedType,
                                        public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The name of the template whose arguments will be deduced.
TemplateName Template;

DeducedTemplateSpecializationType(TemplateName Template,
                                  QualType DeducedAsType,
                                  bool IsDeducedAsDependent)
    : DeducedType(DeducedTemplateSpecialization, DeducedAsType,
                  toTypeDependence(Template.getDependence()) |
                      (IsDeducedAsDependent
                           ? TypeDependence::DependentInstantiation
                           : TypeDependence::None)),
      Template(Template) {}

5065public:
/// Retrieve the name of the template that we are deducing.
TemplateName getTemplateName() const { return Template;}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getTemplateName(), getDeducedType(), isDependentType());
}

static void Profile(llvm::FoldingSetNodeID &ID, TemplateName Template,
                    QualType Deduced, bool IsDependent) {
  Template.Profile(ID);
  ID.AddPointer(Deduced.getAsOpaquePtr());
  ID.AddBoolean(IsDependent);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == DeducedTemplateSpecialization;
}
5083};

5085/// Represents a type template specialization; the template
5086/// must be a class template, a type alias template, or a template
5087/// template parameter.  A template which cannot be resolved to one of
5088/// these, e.g. because it is written with a dependent scope
5089/// specifier, is instead represented as a
5090/// @c DependentTemplateSpecializationType.
5091///
5092/// A non-dependent template specialization type is always "sugar",
5093/// typically for a \c RecordType.  For example, a class template
5094/// specialization type of \c vector<int> will refer to a tag type for
5095/// the instantiation \c std::vector<int, std::allocator<int>>
5096///
5097/// Template specializations are dependent if either the template or
5098/// any of the template arguments are dependent, in which case the
5099/// type may also be canonical.
5100///
5101/// Instances of this type are allocated with a trailing array of
5102/// TemplateArguments, followed by a QualType representing the
5103/// non-canonical aliased type when the template is a type alias
5104/// template.
5105class alignas(8) TemplateSpecializationType
  : public Type,
    public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The name of the template being specialized.  This is
/// either a TemplateName::Template (in which case it is a
/// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a
/// TypeAliasTemplateDecl*), a
/// TemplateName::SubstTemplateTemplateParmPack, or a
/// TemplateName::SubstTemplateTemplateParm (in which case the
/// replacement must, recursively, be one of these).
TemplateName Template;

TemplateSpecializationType(TemplateName T,
                           ArrayRef<TemplateArgument> Args,
                           QualType Canon,
                           QualType Aliased);

5124public:
/// Determine whether any of the given template arguments are dependent.
///
/// The converted arguments should be supplied when known; whether an
/// argument is dependent can depend on the conversions performed on it
/// (for example, a 'const int' passed as a template argument might be
/// dependent if the parameter is a reference but non-dependent if the
/// parameter is an int).
///
/// Note that the \p Args parameter is unused: this is intentional, to remind
/// the caller that they need to pass in the converted arguments, not the
/// specified arguments.
static bool
anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args,
                              ArrayRef<TemplateArgument> Converted);
static bool
anyDependentTemplateArguments(const TemplateArgumentListInfo &,
                              ArrayRef<TemplateArgument> Converted);
static bool anyInstantiationDependentTemplateArguments(
    ArrayRef<TemplateArgumentLoc> Args);

/// True if this template specialization type matches a current
/// instantiation in the context in which it is found.
bool isCurrentInstantiation() const {
  return isa<InjectedClassNameType>(getCanonicalTypeInternal());
}

/// Determine if this template specialization type is for a type alias
/// template that has been substituted.
///
/// Nearly every template specialization type whose template is an alias
/// template will be substituted. However, this is not the case when
/// the specialization contains a pack expansion but the template alias
/// does not have a corresponding parameter pack, e.g.,
///
/// \code
/// template<typename T, typename U, typename V> struct S;
/// template<typename T, typename U> using A = S<T, int, U>;
/// template<typename... Ts> struct X {
///   typedef A<Ts...> type; // not a type alias
/// };
/// \endcode
bool isTypeAlias() const { return TemplateSpecializationTypeBits.TypeAlias; }

/// Get the aliased type, if this is a specialization of a type alias
/// template.
QualType getAliasedType() const {
  assert(isTypeAlias() && "not a type alias template specialization")((void)0);
  return *reinterpret_cast<const QualType*>(end());
}

using iterator = const TemplateArgument *;

iterator begin() const { return getArgs(); }
iterator end() const; // defined inline in TemplateBase.h

/// Retrieve the name of the template that we are specializing.
TemplateName getTemplateName() const { return Template; }

/// Retrieve the template arguments.
const TemplateArgument *getArgs() const {
  return reinterpret_cast<const TemplateArgument *>(this + 1);
}

/// Retrieve the number of template arguments.
unsigned getNumArgs() const {
  return TemplateSpecializationTypeBits.NumArgs;
}

/// Retrieve a specific template argument as a type.
/// \pre \c isArgType(Arg)
const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h

ArrayRef<TemplateArgument> template_arguments() const {
  return {getArgs(), getNumArgs()};
}

bool isSugared() const {
  return !isDependentType() || isCurrentInstantiation() || isTypeAlias();
}

QualType desugar() const {
  return isTypeAlias() ? getAliasedType() : getCanonicalTypeInternal();
}

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) {
  Profile(ID, Template, template_arguments(), Ctx);
  if (isTypeAlias())
    getAliasedType().Profile(ID);
}

static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T,
                    ArrayRef<TemplateArgument> Args,
                    const ASTContext &Context);

static bool classof(const Type *T) {
  return T->getTypeClass() == TemplateSpecialization;
}
5222};

5224/// Print a template argument list, including the '<' and '>'
5225/// enclosing the template arguments.
5226void printTemplateArgumentList(raw_ostream &OS,
                             ArrayRef<TemplateArgument> Args,
                             const PrintingPolicy &Policy,
                             const TemplateParameterList *TPL = nullptr);

5231void printTemplateArgumentList(raw_ostream &OS,
                             ArrayRef<TemplateArgumentLoc> Args,
                             const PrintingPolicy &Policy,
                             const TemplateParameterList *TPL = nullptr);

5236void printTemplateArgumentList(raw_ostream &OS,
                             const TemplateArgumentListInfo &Args,
                             const PrintingPolicy &Policy,
                             const TemplateParameterList *TPL = nullptr);

5241/// The injected class name of a C++ class template or class
5242/// template partial specialization.  Used to record that a type was
5243/// spelled with a bare identifier rather than as a template-id; the
5244/// equivalent for non-templated classes is just RecordType.
5245///
5246/// Injected class name types are always dependent.  Template
5247/// instantiation turns these into RecordTypes.
5248///
5249/// Injected class name types are always canonical.  This works
5250/// because it is impossible to compare an injected class name type
5251/// with the corresponding non-injected template type, for the same
5252/// reason that it is impossible to directly compare template
5253/// parameters from different dependent contexts: injected class name
5254/// types can only occur within the scope of a particular templated
5255/// declaration, and within that scope every template specialization
5256/// will canonicalize to the injected class name (when appropriate
5257/// according to the rules of the language).
5258class InjectedClassNameType : public Type {
friend class ASTContext; // ASTContext creates these.
friend class ASTNodeImporter;
friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not
                        // currently suitable for AST reading, too much
                        // interdependencies.
template <class T> friend class serialization::AbstractTypeReader;

CXXRecordDecl *Decl;

/// The template specialization which this type represents.
/// For example, in
///   template <class T> class A { ... };
/// this is A<T>, whereas in
///   template <class X, class Y> class A<B<X,Y> > { ... };
/// this is A<B<X,Y> >.
///
/// It is always unqualified, always a template specialization type,
/// and always dependent.
QualType InjectedType;

InjectedClassNameType(CXXRecordDecl *D, QualType TST)
    : Type(InjectedClassName, QualType(),
           TypeDependence::DependentInstantiation),
      Decl(D), InjectedType(TST) {
  assert(isa<TemplateSpecializationType>(TST))((void)0);
  assert(!TST.hasQualifiers())((void)0);
  assert(TST->isDependentType())((void)0);
}

5288public:
QualType getInjectedSpecializationType() const { return InjectedType; }

const TemplateSpecializationType *getInjectedTST() const {
  return cast<TemplateSpecializationType>(InjectedType.getTypePtr());
}

TemplateName getTemplateName() const {
  return getInjectedTST()->getTemplateName();
}

CXXRecordDecl *getDecl() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == InjectedClassName;
}
5307};

5309/// The kind of a tag type.
5310enum TagTypeKind {
/// The "struct" keyword.
TTK_Struct,

/// The "__interface" keyword.
TTK_Interface,

/// The "union" keyword.
TTK_Union,

/// The "class" keyword.
TTK_Class,

/// The "enum" keyword.
TTK_Enum
5325};

5327/// The elaboration keyword that precedes a qualified type name or
5328/// introduces an elaborated-type-specifier.
5329enum ElaboratedTypeKeyword {
/// The "struct" keyword introduces the elaborated-type-specifier.
ETK_Struct,

/// The "__interface" keyword introduces the elaborated-type-specifier.
ETK_Interface,

/// The "union" keyword introduces the elaborated-type-specifier.
ETK_Union,

/// The "class" keyword introduces the elaborated-type-specifier.
ETK_Class,

/// The "enum" keyword introduces the elaborated-type-specifier.
ETK_Enum,

/// The "typename" keyword precedes the qualified type name, e.g.,
/// \c typename T::type.
ETK_Typename,

/// No keyword precedes the qualified type name.
ETK_None
5351};

5353/// A helper class for Type nodes having an ElaboratedTypeKeyword.
5354/// The keyword in stored in the free bits of the base class.
5355/// Also provides a few static helpers for converting and printing
5356/// elaborated type keyword and tag type kind enumerations.
5357class TypeWithKeyword : public Type {
5358protected:
TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc,
                QualType Canonical, TypeDependence Dependence)
    : Type(tc, Canonical, Dependence) {
  TypeWithKeywordBits.Keyword = Keyword;
}

5365public:
ElaboratedTypeKeyword getKeyword() const {
  return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword);
}

/// Converts a type specifier (DeclSpec::TST) into an elaborated type keyword.
static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec);

/// Converts a type specifier (DeclSpec::TST) into a tag type kind.
/// It is an error to provide a type specifier which *isn't* a tag kind here.
static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec);

/// Converts a TagTypeKind into an elaborated type keyword.
static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag);

/// Converts an elaborated type keyword into a TagTypeKind.
/// It is an error to provide an elaborated type keyword
/// which *isn't* a tag kind here.
static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword);

static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword);

static StringRef getKeywordName(ElaboratedTypeKeyword Keyword);

static StringRef getTagTypeKindName(TagTypeKind Kind) {
  return getKeywordName(getKeywordForTagTypeKind(Kind));
}

class CannotCastToThisType {};
static CannotCastToThisType classof(const Type *);
5395};

5397/// Represents a type that was referred to using an elaborated type
5398/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type,
5399/// or both.
5400///
5401/// This type is used to keep track of a type name as written in the
5402/// source code, including tag keywords and any nested-name-specifiers.
5403/// The type itself is always "sugar", used to express what was written
5404/// in the source code but containing no additional semantic information.
5405class ElaboratedType final
  : public TypeWithKeyword,
    public llvm::FoldingSetNode,
    private llvm::TrailingObjects<ElaboratedType, TagDecl *> {
friend class ASTContext; // ASTContext creates these
friend TrailingObjects;

/// The nested name specifier containing the qualifier.
NestedNameSpecifier *NNS;

/// The type that this qualified name refers to.
QualType NamedType;

/// The (re)declaration of this tag type owned by this occurrence is stored
/// as a trailing object if there is one. Use getOwnedTagDecl to obtain
/// it, or obtain a null pointer if there is none.

ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS,
               QualType NamedType, QualType CanonType, TagDecl *OwnedTagDecl)
    : TypeWithKeyword(Keyword, Elaborated, CanonType,
                      // Any semantic dependence on the qualifier will have
                      // been incorporated into NamedType. We still need to
                      // track syntactic (instantiation / error / pack)
                      // dependence on the qualifier.
                      NamedType->getDependence() |
                          (NNS ? toSyntacticDependence(
                                     toTypeDependence(NNS->getDependence()))
                               : TypeDependence::None)),
      NNS(NNS), NamedType(NamedType) {
  ElaboratedTypeBits.HasOwnedTagDecl = false;
  if (OwnedTagDecl) {
    ElaboratedTypeBits.HasOwnedTagDecl = true;
    *getTrailingObjects<TagDecl *>() = OwnedTagDecl;
  }
  assert(!(Keyword == ETK_None && NNS == nullptr) &&((void)0)
         "ElaboratedType cannot have elaborated type keyword "((void)0)
         "and name qualifier both null.")((void)0);
}

5444public:
/// Retrieve the qualification on this type.
NestedNameSpecifier *getQualifier() const { return NNS; }

/// Retrieve the type named by the qualified-id.
QualType getNamedType() const { return NamedType; }

/// Remove a single level of sugar.
QualType desugar() const { return getNamedType(); }

/// Returns whether this type directly provides sugar.
bool isSugared() const { return true; }

/// Return the (re)declaration of this type owned by this occurrence of this
/// type, or nullptr if there is none.
TagDecl *getOwnedTagDecl() const {
  return ElaboratedTypeBits.HasOwnedTagDecl ? *getTrailingObjects<TagDecl *>()
                                            : nullptr;
}

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getKeyword(), NNS, NamedType, getOwnedTagDecl());
}

static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword,
                    NestedNameSpecifier *NNS, QualType NamedType,
                    TagDecl *OwnedTagDecl) {
  ID.AddInteger(Keyword);
  ID.AddPointer(NNS);
  NamedType.Profile(ID);
  ID.AddPointer(OwnedTagDecl);
}

static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; }
5478};

5480/// Represents a qualified type name for which the type name is
5481/// dependent.
5482///
5483/// DependentNameType represents a class of dependent types that involve a
5484/// possibly dependent nested-name-specifier (e.g., "T::") followed by a
5485/// name of a type. The DependentNameType may start with a "typename" (for a
5486/// typename-specifier), "class", "struct", "union", or "enum" (for a
5487/// dependent elaborated-type-specifier), or nothing (in contexts where we
5488/// know that we must be referring to a type, e.g., in a base class specifier).
5489/// Typically the nested-name-specifier is dependent, but in MSVC compatibility
5490/// mode, this type is used with non-dependent names to delay name lookup until
5491/// instantiation.
5492class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The nested name specifier containing the qualifier.
NestedNameSpecifier *NNS;

/// The type that this typename specifier refers to.
const IdentifierInfo *Name;

DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS,
                  const IdentifierInfo *Name, QualType CanonType)
    : TypeWithKeyword(Keyword, DependentName, CanonType,
                      TypeDependence::DependentInstantiation |
                          toTypeDependence(NNS->getDependence())),
      NNS(NNS), Name(Name) {}

5508public:
/// Retrieve the qualification on this type.
NestedNameSpecifier *getQualifier() const { return NNS; }

/// Retrieve the type named by the typename specifier as an identifier.
///
/// This routine will return a non-NULL identifier pointer when the
/// form of the original typename was terminated by an identifier,
/// e.g., "typename T::type".
const IdentifierInfo *getIdentifier() const {
  return Name;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getKeyword(), NNS, Name);
}

static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword,
                    NestedNameSpecifier *NNS, const IdentifierInfo *Name) {
  ID.AddInteger(Keyword);
  ID.AddPointer(NNS);
  ID.AddPointer(Name);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentName;
}
5538};

5540/// Represents a template specialization type whose template cannot be
5541/// resolved, e.g.
5542///   A<T>::template B<T>
5543class alignas(8) DependentTemplateSpecializationType
  : public TypeWithKeyword,
    public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The nested name specifier containing the qualifier.
NestedNameSpecifier *NNS;

/// The identifier of the template.
const IdentifierInfo *Name;

DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword,
                                    NestedNameSpecifier *NNS,
                                    const IdentifierInfo *Name,
                                    ArrayRef<TemplateArgument> Args,
                                    QualType Canon);

const TemplateArgument *getArgBuffer() const {
  return reinterpret_cast<const TemplateArgument*>(this+1);
}

TemplateArgument *getArgBuffer() {
  return reinterpret_cast<TemplateArgument*>(this+1);
}

5568public:
NestedNameSpecifier *getQualifier() const { return NNS; }
const IdentifierInfo *getIdentifier() const { return Name; }

/// Retrieve the template arguments.
const TemplateArgument *getArgs() const {
  return getArgBuffer();
}

/// Retrieve the number of template arguments.
unsigned getNumArgs() const {
  return DependentTemplateSpecializationTypeBits.NumArgs;
}

const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h

ArrayRef<TemplateArgument> template_arguments() const {
  return {getArgs(), getNumArgs()};
}

using iterator = const TemplateArgument *;

iterator begin() const { return getArgs(); }
iterator end() const; // inline in TemplateBase.h

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) {
  Profile(ID, Context, getKeyword(), NNS, Name, {getArgs(), getNumArgs()});
}

static void Profile(llvm::FoldingSetNodeID &ID,
                    const ASTContext &Context,
                    ElaboratedTypeKeyword Keyword,
                    NestedNameSpecifier *Qualifier,
                    const IdentifierInfo *Name,
                    ArrayRef<TemplateArgument> Args);

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentTemplateSpecialization;
}
5610};

5612/// Represents a pack expansion of types.
5613///
5614/// Pack expansions are part of C++11 variadic templates. A pack
5615/// expansion contains a pattern, which itself contains one or more
5616/// "unexpanded" parameter packs. When instantiated, a pack expansion
5617/// produces a series of types, each instantiated from the pattern of
5618/// the expansion, where the Ith instantiation of the pattern uses the
5619/// Ith arguments bound to each of the unexpanded parameter packs. The
5620/// pack expansion is considered to "expand" these unexpanded
5621/// parameter packs.
5622///
5623/// \code
5624/// template<typename ...Types> struct tuple;
5625///
5626/// template<typename ...Types>
5627/// struct tuple_of_references {
5628///   typedef tuple<Types&...> type;
5629/// };
5630/// \endcode
5631///
5632/// Here, the pack expansion \c Types&... is represented via a
5633/// PackExpansionType whose pattern is Types&.
5634class PackExpansionType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these

/// The pattern of the pack expansion.
QualType Pattern;

PackExpansionType(QualType Pattern, QualType Canon,
                  Optional<unsigned> NumExpansions)
    : Type(PackExpansion, Canon,
           (Pattern->getDependence() | TypeDependence::Dependent |
            TypeDependence::Instantiation) &
               ~TypeDependence::UnexpandedPack),
      Pattern(Pattern) {
  PackExpansionTypeBits.NumExpansions =
      NumExpansions ? *NumExpansions + 1 : 0;
}

5651public:
/// Retrieve the pattern of this pack expansion, which is the
/// type that will be repeatedly instantiated when instantiating the
/// pack expansion itself.
QualType getPattern() const { return Pattern; }

/// Retrieve the number of expansions that this pack expansion will
/// generate, if known.
Optional<unsigned> getNumExpansions() const {
  if (PackExpansionTypeBits.NumExpansions)
    return PackExpansionTypeBits.NumExpansions - 1;
  return None;
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getPattern(), getNumExpansions());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern,
                    Optional<unsigned> NumExpansions) {
  ID.AddPointer(Pattern.getAsOpaquePtr());
  ID.AddBoolean(NumExpansions.hasValue());
  if (NumExpansions)
    ID.AddInteger(*NumExpansions);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == PackExpansion;
}
5683};

5685/// This class wraps the list of protocol qualifiers. For types that can
5686/// take ObjC protocol qualifers, they can subclass this class.
5687template <class T>
5688class ObjCProtocolQualifiers {
5689protected:
ObjCProtocolQualifiers() = default;

ObjCProtocolDecl * const *getProtocolStorage() const {
  return const_cast<ObjCProtocolQualifiers*>(this)->getProtocolStorage();
}

ObjCProtocolDecl **getProtocolStorage() {
  return static_cast<T*>(this)->getProtocolStorageImpl();
}

void setNumProtocols(unsigned N) {
  static_cast<T*>(this)->setNumProtocolsImpl(N);
}

void initialize(ArrayRef<ObjCProtocolDecl *> protocols) {
  setNumProtocols(protocols.size());
  assert(getNumProtocols() == protocols.size() &&((void)0)
         "bitfield overflow in protocol count")((void)0);
  if (!protocols.empty())
    memcpy(getProtocolStorage(), protocols.data(),
           protocols.size() * sizeof(ObjCProtocolDecl*));
}

5713public:
using qual_iterator = ObjCProtocolDecl * const *;
using qual_range = llvm::iterator_range<qual_iterator>;

qual_range quals() const { return qual_range(qual_begin(), qual_end()); }
qual_iterator qual_begin() const { return getProtocolStorage(); }
qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); }

bool qual_empty() const { return getNumProtocols() == 0; }

/// Return the number of qualifying protocols in this type, or 0 if
/// there are none.
unsigned getNumProtocols() const {
  return static_cast<const T*>(this)->getNumProtocolsImpl();
}

/// Fetch a protocol by index.
ObjCProtocolDecl *getProtocol(unsigned I) const {
  assert(I < getNumProtocols() && "Out-of-range protocol access")((void)0);
  return qual_begin()[I];
}

/// Retrieve all of the protocol qualifiers.
ArrayRef<ObjCProtocolDecl *> getProtocols() const {
  return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols());
}
5739};

5741/// Represents a type parameter type in Objective C. It can take
5742/// a list of protocols.
5743class ObjCTypeParamType : public Type,
                        public ObjCProtocolQualifiers<ObjCTypeParamType>,
                        public llvm::FoldingSetNode {
friend class ASTContext;
friend class ObjCProtocolQualifiers<ObjCTypeParamType>;

/// The number of protocols stored on this type.
unsigned NumProtocols : 6;

ObjCTypeParamDecl *OTPDecl;

/// The protocols are stored after the ObjCTypeParamType node. In the
/// canonical type, the list of protocols are sorted alphabetically
/// and uniqued.
ObjCProtocolDecl **getProtocolStorageImpl();

/// Return the number of qualifying protocols in this interface type,
/// or 0 if there are none.
unsigned getNumProtocolsImpl() const {
  return NumProtocols;
}

void setNumProtocolsImpl(unsigned N) {
  NumProtocols = N;
}

ObjCTypeParamType(const ObjCTypeParamDecl *D,
                  QualType can,
                  ArrayRef<ObjCProtocolDecl *> protocols);

5773public:
bool isSugared() const { return true; }
QualType desugar() const { return getCanonicalTypeInternal(); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ObjCTypeParam;
}

void Profile(llvm::FoldingSetNodeID &ID);
static void Profile(llvm::FoldingSetNodeID &ID,
                    const ObjCTypeParamDecl *OTPDecl,
                    QualType CanonicalType,
                    ArrayRef<ObjCProtocolDecl *> protocols);

ObjCTypeParamDecl *getDecl() const { return OTPDecl; }
5788};

5790/// Represents a class type in Objective C.
5791///
5792/// Every Objective C type is a combination of a base type, a set of
5793/// type arguments (optional, for parameterized classes) and a list of
5794/// protocols.
5795///
5796/// Given the following declarations:
5797/// \code
5798///   \@class C<T>;
5799///   \@protocol P;
5800/// \endcode
5801///
5802/// 'C' is an ObjCInterfaceType C.  It is sugar for an ObjCObjectType
5803/// with base C and no protocols.
5804///
5805/// 'C<P>' is an unspecialized ObjCObjectType with base C and protocol list [P].
5806/// 'C<C*>' is a specialized ObjCObjectType with type arguments 'C*' and no
5807/// protocol list.
5808/// 'C<C*><P>' is a specialized ObjCObjectType with base C, type arguments 'C*',
5809/// and protocol list [P].
5810///
5811/// 'id' is a TypedefType which is sugar for an ObjCObjectPointerType whose
5812/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType
5813/// and no protocols.
5814///
5815/// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType
5816/// with base BuiltinType::ObjCIdType and protocol list [P].  Eventually
5817/// this should get its own sugar class to better represent the source.
5818class ObjCObjectType : public Type,
                     public ObjCProtocolQualifiers<ObjCObjectType> {
friend class ObjCProtocolQualifiers<ObjCObjectType>;

// ObjCObjectType.NumTypeArgs - the number of type arguments stored
// after the ObjCObjectPointerType node.
// ObjCObjectType.NumProtocols - the number of protocols stored
// after the type arguments of ObjCObjectPointerType node.
//
// These protocols are those written directly on the type.  If
// protocol qualifiers ever become additive, the iterators will need
// to get kindof complicated.
//
// In the canonical object type, these are sorted alphabetically
// and uniqued.

/// Either a BuiltinType or an InterfaceType or sugar for either.
QualType BaseType;

/// Cached superclass type.
mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool>
  CachedSuperClassType;

QualType *getTypeArgStorage();
const QualType *getTypeArgStorage() const {
  return const_cast<ObjCObjectType *>(this)->getTypeArgStorage();
}

ObjCProtocolDecl **getProtocolStorageImpl();
/// Return the number of qualifying protocols in this interface type,
/// or 0 if there are none.
unsigned getNumProtocolsImpl() const {
  return ObjCObjectTypeBits.NumProtocols;
}
void setNumProtocolsImpl(unsigned N) {
  ObjCObjectTypeBits.NumProtocols = N;
}

5856protected:
enum Nonce_ObjCInterface { Nonce_ObjCInterface };

ObjCObjectType(QualType Canonical, QualType Base,
               ArrayRef<QualType> typeArgs,
               ArrayRef<ObjCProtocolDecl *> protocols,
               bool isKindOf);

ObjCObjectType(enum Nonce_ObjCInterface)
    : Type(ObjCInterface, QualType(), TypeDependence::None),
      BaseType(QualType(this_(), 0)) {
  ObjCObjectTypeBits.NumProtocols = 0;
  ObjCObjectTypeBits.NumTypeArgs = 0;
  ObjCObjectTypeBits.IsKindOf = 0;
}

void computeSuperClassTypeSlow() const;

5874public:
/// Gets the base type of this object type.  This is always (possibly
/// sugar for) one of:
///  - the 'id' builtin type (as opposed to the 'id' type visible to the
///    user, which is a typedef for an ObjCObjectPointerType)
///  - the 'Class' builtin type (same caveat)
///  - an ObjCObjectType (currently always an ObjCInterfaceType)
QualType getBaseType() const { return BaseType; }

bool isObjCId() const {
  return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId);
}

bool isObjCClass() const {
  return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass);
}

bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); }
bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); }
bool isObjCUnqualifiedIdOrClass() const {
  if (!qual_empty()) return false;
  if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>())
    return T->getKind() == BuiltinType::ObjCId ||
           T->getKind() == BuiltinType::ObjCClass;
  return false;
}
bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); }
bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); }

/// Gets the interface declaration for this object type, if the base type
/// really is an interface.
ObjCInterfaceDecl *getInterface() const;

/// Determine whether this object type is "specialized", meaning
/// that it has type arguments.
bool isSpecialized() const;

/// Determine whether this object type was written with type arguments.
bool isSpecializedAsWritten() const {
  return ObjCObjectTypeBits.NumTypeArgs > 0;
}

/// Determine whether this object type is "unspecialized", meaning
/// that it has no type arguments.
bool isUnspecialized() const { return !isSpecialized(); }

/// Determine whether this object type is "unspecialized" as
/// written, meaning that it has no type arguments.
bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); }

/// Retrieve the type arguments of this object type (semantically).
ArrayRef<QualType> getTypeArgs() const;

/// Retrieve the type arguments of this object type as they were
/// written.
ArrayRef<QualType> getTypeArgsAsWritten() const {
  return llvm::makeArrayRef(getTypeArgStorage(),
                            ObjCObjectTypeBits.NumTypeArgs);
}

/// Whether this is a "__kindof" type as written.
bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; }

/// Whether this ia a "__kindof" type (semantically).
bool isKindOfType() const;

/// Retrieve the type of the superclass of this object type.
///
/// This operation substitutes any type arguments into the
/// superclass of the current class type, potentially producing a
/// specialization of the superclass type. Produces a null type if
/// there is no superclass.
QualType getSuperClassType() const {
  if (!CachedSuperClassType.getInt())
    computeSuperClassTypeSlow();

  assert(CachedSuperClassType.getInt() && "Superclass not set?")((void)0);
  return QualType(CachedSuperClassType.getPointer(), 0);
}

/// Strip off the Objective-C "kindof" type and (with it) any
/// protocol qualifiers.
QualType stripObjCKindOfTypeAndQuals(const ASTContext &ctx) const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ObjCObject ||
         T->getTypeClass() == ObjCInterface;
}
5965};

5967/// A class providing a concrete implementation
5968/// of ObjCObjectType, so as to not increase the footprint of
5969/// ObjCInterfaceType.  Code outside of ASTContext and the core type
5970/// system should not reference this type.
5971class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode {
friend class ASTContext;

// If anyone adds fields here, ObjCObjectType::getProtocolStorage()
// will need to be modified.

ObjCObjectTypeImpl(QualType Canonical, QualType Base,
                   ArrayRef<QualType> typeArgs,
                   ArrayRef<ObjCProtocolDecl *> protocols,
                   bool isKindOf)
    : ObjCObjectType(Canonical, Base, typeArgs, protocols, isKindOf) {}

5983public:
void Profile(llvm::FoldingSetNodeID &ID);
static void Profile(llvm::FoldingSetNodeID &ID,
                    QualType Base,
                    ArrayRef<QualType> typeArgs,
                    ArrayRef<ObjCProtocolDecl *> protocols,
                    bool isKindOf);
5990};

5992inline QualType *ObjCObjectType::getTypeArgStorage() {
return reinterpret_cast<QualType *>(static_cast<ObjCObjectTypeImpl*>(this)+1);
5994}

5996inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorageImpl() {
  return reinterpret_cast<ObjCProtocolDecl**>(
           getTypeArgStorage() + ObjCObjectTypeBits.NumTypeArgs);
5999}

6001inline ObjCProtocolDecl **ObjCTypeParamType::getProtocolStorageImpl() {
  return reinterpret_cast<ObjCProtocolDecl**>(
           static_cast<ObjCTypeParamType*>(this)+1);
6004}

6006/// Interfaces are the core concept in Objective-C for object oriented design.
6007/// They basically correspond to C++ classes.  There are two kinds of interface
6008/// types: normal interfaces like `NSString`, and qualified interfaces, which
6009/// are qualified with a protocol list like `NSString<NSCopyable, NSAmazing>`.
6010///
6011/// ObjCInterfaceType guarantees the following properties when considered
6012/// as a subtype of its superclass, ObjCObjectType:
6013///   - There are no protocol qualifiers.  To reinforce this, code which
6014///     tries to invoke the protocol methods via an ObjCInterfaceType will
6015///     fail to compile.
6016///   - It is its own base type.  That is, if T is an ObjCInterfaceType*,
6017///     T->getBaseType() == QualType(T, 0).
6018class ObjCInterfaceType : public ObjCObjectType {
friend class ASTContext; // ASTContext creates these.
friend class ASTReader;
friend class ObjCInterfaceDecl;
template <class T> friend class serialization::AbstractTypeReader;

mutable ObjCInterfaceDecl *Decl;

ObjCInterfaceType(const ObjCInterfaceDecl *D)
    : ObjCObjectType(Nonce_ObjCInterface),
      Decl(const_cast<ObjCInterfaceDecl*>(D)) {}

6030public:
/// Get the declaration of this interface.
ObjCInterfaceDecl *getDecl() const { return Decl; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

static bool classof(const Type *T) {
  return T->getTypeClass() == ObjCInterface;
}

// Nonsense to "hide" certain members of ObjCObjectType within this
// class.  People asking for protocols on an ObjCInterfaceType are
// not going to get what they want: ObjCInterfaceTypes are
// guaranteed to have no protocols.
enum {
  qual_iterator,
  qual_begin,
  qual_end,
  getNumProtocols,
  getProtocol
};
6052};

6054inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const {
QualType baseType = getBaseType();
while (const auto *ObjT = baseType->getAs<ObjCObjectType>()) {
  if (const auto *T = dyn_cast<ObjCInterfaceType>(ObjT))
    return T->getDecl();

  baseType = ObjT->getBaseType();
}

return nullptr;
6064}

6066/// Represents a pointer to an Objective C object.
6067///
6068/// These are constructed from pointer declarators when the pointee type is
6069/// an ObjCObjectType (or sugar for one).  In addition, the 'id' and 'Class'
6070/// types are typedefs for these, and the protocol-qualified types 'id<P>'
6071/// and 'Class<P>' are translated into these.
6072///
6073/// Pointers to pointers to Objective C objects are still PointerTypes;
6074/// only the first level of pointer gets it own type implementation.
6075class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType PointeeType;

ObjCObjectPointerType(QualType Canonical, QualType Pointee)
    : Type(ObjCObjectPointer, Canonical, Pointee->getDependence()),
      PointeeType(Pointee) {}

6084public:
/// Gets the type pointed to by this ObjC pointer.
/// The result will always be an ObjCObjectType or sugar thereof.
QualType getPointeeType() const { return PointeeType; }

/// Gets the type pointed to by this ObjC pointer.  Always returns non-null.
///
/// This method is equivalent to getPointeeType() except that
/// it discards any typedefs (or other sugar) between this
/// type and the "outermost" object type.  So for:
/// \code
///   \@class A; \@protocol P; \@protocol Q;
///   typedef A<P> AP;
///   typedef A A1;
///   typedef A1<P> A1P;
///   typedef A1P<Q> A1PQ;
/// \endcode
/// For 'A*', getObjectType() will return 'A'.
/// For 'A<P>*', getObjectType() will return 'A<P>'.
/// For 'AP*', getObjectType() will return 'A<P>'.
/// For 'A1*', getObjectType() will return 'A'.
/// For 'A1<P>*', getObjectType() will return 'A1<P>'.
/// For 'A1P*', getObjectType() will return 'A1<P>'.
/// For 'A1PQ*', getObjectType() will return 'A1<Q>', because
///   adding protocols to a protocol-qualified base discards the
///   old qualifiers (for now).  But if it didn't, getObjectType()
///   would return 'A1P<Q>' (and we'd have to make iterating over
///   qualifiers more complicated).
const ObjCObjectType *getObjectType() const {
  return PointeeType->castAs<ObjCObjectType>();
}

/// If this pointer points to an Objective C
/// \@interface type, gets the type for that interface.  Any protocol
/// qualifiers on the interface are ignored.
///
/// \return null if the base type for this pointer is 'id' or 'Class'
const ObjCInterfaceType *getInterfaceType() const;

/// If this pointer points to an Objective \@interface
/// type, gets the declaration for that interface.
///
/// \return null if the base type for this pointer is 'id' or 'Class'
ObjCInterfaceDecl *getInterfaceDecl() const {
  return getObjectType()->getInterface();
}

/// True if this is equivalent to the 'id' type, i.e. if
/// its object type is the primitive 'id' type with no protocols.
bool isObjCIdType() const {
  return getObjectType()->isObjCUnqualifiedId();
}

/// True if this is equivalent to the 'Class' type,
/// i.e. if its object tive is the primitive 'Class' type with no protocols.
bool isObjCClassType() const {
  return getObjectType()->isObjCUnqualifiedClass();
}

/// True if this is equivalent to the 'id' or 'Class' type,
bool isObjCIdOrClassType() const {
  return getObjectType()->isObjCUnqualifiedIdOrClass();
}

/// True if this is equivalent to 'id<P>' for some non-empty set of
/// protocols.
bool isObjCQualifiedIdType() const {
  return getObjectType()->isObjCQualifiedId();
}

/// True if this is equivalent to 'Class<P>' for some non-empty set of
/// protocols.
bool isObjCQualifiedClassType() const {
  return getObjectType()->isObjCQualifiedClass();
}

/// Whether this is a "__kindof" type.
bool isKindOfType() const { return getObjectType()->isKindOfType(); }

/// Whether this type is specialized, meaning that it has type arguments.
bool isSpecialized() const { return getObjectType()->isSpecialized(); }

/// Whether this type is specialized, meaning that it has type arguments.
bool isSpecializedAsWritten() const {
  return getObjectType()->isSpecializedAsWritten();
}

/// Whether this type is unspecialized, meaning that is has no type arguments.
bool isUnspecialized() const { return getObjectType()->isUnspecialized(); }

/// Determine whether this object type is "unspecialized" as
/// written, meaning that it has no type arguments.
bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); }

/// Retrieve the type arguments for this type.
ArrayRef<QualType> getTypeArgs() const {
  return getObjectType()->getTypeArgs();
}

/// Retrieve the type arguments for this type.
ArrayRef<QualType> getTypeArgsAsWritten() const {
  return getObjectType()->getTypeArgsAsWritten();
}

/// An iterator over the qualifiers on the object type.  Provided
/// for convenience.  This will always iterate over the full set of
/// protocols on a type, not just those provided directly.
using qual_iterator = ObjCObjectType::qual_iterator;
using qual_range = llvm::iterator_range<qual_iterator>;

qual_range quals() const { return qual_range(qual_begin(), qual_end()); }

qual_iterator qual_begin() const {
  return getObjectType()->qual_begin();
}

qual_iterator qual_end() const {
  return getObjectType()->qual_end();
}

bool qual_empty() const { return getObjectType()->qual_empty(); }

/// Return the number of qualifying protocols on the object type.
unsigned getNumProtocols() const {
  return getObjectType()->getNumProtocols();
}

/// Retrieve a qualifying protocol by index on the object type.
ObjCProtocolDecl *getProtocol(unsigned I) const {
  return getObjectType()->getProtocol(I);
}

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

/// Retrieve the type of the superclass of this object pointer type.
///
/// This operation substitutes any type arguments into the
/// superclass of the current class type, potentially producing a
/// pointer to a specialization of the superclass type. Produces a
/// null type if there is no superclass.
QualType getSuperClassType() const;

/// Strip off the Objective-C "kindof" type and (with it) any
/// protocol qualifiers.
const ObjCObjectPointerType *stripObjCKindOfTypeAndQuals(
                               const ASTContext &ctx) const;

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getPointeeType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType T) {
  ID.AddPointer(T.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == ObjCObjectPointer;
}
6243};

6245class AtomicType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType ValueType;

AtomicType(QualType ValTy, QualType Canonical)
    : Type(Atomic, Canonical, ValTy->getDependence()), ValueType(ValTy) {}

6253public:
/// Gets the type contained by this atomic type, i.e.
/// the type returned by performing an atomic load of this atomic type.
QualType getValueType() const { return ValueType; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getValueType());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType T) {
  ID.AddPointer(T.getAsOpaquePtr());
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Atomic;
}
6272};

6274/// PipeType - OpenCL20.
6275class PipeType : public Type, public llvm::FoldingSetNode {
friend class ASTContext; // ASTContext creates these.

QualType ElementType;
bool isRead;

PipeType(QualType elemType, QualType CanonicalPtr, bool isRead)
    : Type(Pipe, CanonicalPtr, elemType->getDependence()),
      ElementType(elemType), isRead(isRead) {}

6285public:
QualType getElementType() const { return ElementType; }

bool isSugared() const { return false; }

QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, getElementType(), isReadOnly());
}

static void Profile(llvm::FoldingSetNodeID &ID, QualType T, bool isRead) {
  ID.AddPointer(T.getAsOpaquePtr());
  ID.AddBoolean(isRead);
}

static bool classof(const Type *T) {
  return T->getTypeClass() == Pipe;
}

bool isReadOnly() const { return isRead; }
6306};

6308/// A fixed int type of a specified bitwidth.
6309class ExtIntType final : public Type, public llvm::FoldingSetNode {
friend class ASTContext;
unsigned IsUnsigned : 1;
unsigned NumBits : 24;

6314protected:
ExtIntType(bool isUnsigned, unsigned NumBits);

6317public:
bool isUnsigned() const { return IsUnsigned; }
bool isSigned() const { return !IsUnsigned; }
unsigned getNumBits() const { return NumBits; }

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, isUnsigned(), getNumBits());
}

static void Profile(llvm::FoldingSetNodeID &ID, bool IsUnsigned,
                    unsigned NumBits) {
  ID.AddBoolean(IsUnsigned);
  ID.AddInteger(NumBits);
}

static bool classof(const Type *T) { return T->getTypeClass() == ExtInt; }
6336};

6338class DependentExtIntType final : public Type, public llvm::FoldingSetNode {
friend class ASTContext;
const ASTContext &Context;
llvm::PointerIntPair<Expr*, 1, bool> ExprAndUnsigned;

6343protected:
DependentExtIntType(const ASTContext &Context, bool IsUnsigned,
                    Expr *NumBits);

6347public:
bool isUnsigned() const;
bool isSigned() const { return !isUnsigned(); }
Expr *getNumBitsExpr() const;

bool isSugared() const { return false; }
QualType desugar() const { return QualType(this, 0); }

void Profile(llvm::FoldingSetNodeID &ID) {
  Profile(ID, Context, isUnsigned(), getNumBitsExpr());
}
static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
                    bool IsUnsigned, Expr *NumBitsExpr);

static bool classof(const Type *T) {
  return T->getTypeClass() == DependentExtInt;
}
6364};

6366/// A qualifier set is used to build a set of qualifiers.
6367class QualifierCollector : public Qualifiers {
6368public:
QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {}

/// Collect any qualifiers on the given type and return an
/// unqualified type.  The qualifiers are assumed to be consistent
/// with those already in the type.
const Type *strip(QualType type) {
  addFastQualifiers(type.getLocalFastQualifiers());
  if (!type.hasLocalNonFastQualifiers())
    return type.getTypePtrUnsafe();

  const ExtQuals *extQuals = type.getExtQualsUnsafe();
  addConsistentQualifiers(extQuals->getQualifiers());
  return extQuals->getBaseType();
}

/// Apply the collected qualifiers to the given type.
QualType apply(const ASTContext &Context, QualType QT) const;

/// Apply the collected qualifiers to the given type.
QualType apply(const ASTContext &Context, const Type* T) const;
6389};

6391/// A container of type source information.
6392///
6393/// A client can read the relevant info using TypeLoc wrappers, e.g:
6394/// @code
6395/// TypeLoc TL = TypeSourceInfo->getTypeLoc();
6396/// TL.getBeginLoc().print(OS, SrcMgr);
6397/// @endcode
6398class alignas(8) TypeSourceInfo {
// Contains a memory block after the class, used for type source information,
// allocated by ASTContext.
friend class ASTContext;

QualType Ty;

TypeSourceInfo(QualType ty) : Ty(ty) {}

6407public:
/// Return the type wrapped by this type source info.
QualType getType() const { return Ty; }

/// Return the TypeLoc wrapper for the type source info.
TypeLoc getTypeLoc() const; // implemented in TypeLoc.h

/// Override the type stored in this TypeSourceInfo. Use with caution!
void overrideType(QualType T) { Ty = T; }
6416};

6418// Inline function definitions.

6420inline SplitQualType SplitQualType::getSingleStepDesugaredType() const {
SplitQualType desugar =
  Ty->getLocallyUnqualifiedSingleStepDesugaredType().split();
desugar.Quals.addConsistentQualifiers(Quals);
return desugar;
6425}

6427inline const Type *QualType::getTypePtr() const {
return getCommonPtr()->BaseType;
6429}

6431inline const Type *QualType::getTypePtrOrNull() const {
return (isNull() ? nullptr : getCommonPtr()->BaseType);
6433}

6435inline SplitQualType QualType::split() const {
if (!hasLocalNonFastQualifiers())
  return SplitQualType(getTypePtrUnsafe(),
                       Qualifiers::fromFastMask(getLocalFastQualifiers()));

const ExtQuals *eq = getExtQualsUnsafe();
Qualifiers qs = eq->getQualifiers();
qs.addFastQualifiers(getLocalFastQualifiers());
return SplitQualType(eq->getBaseType(), qs);
6444}

6446inline Qualifiers QualType::getLocalQualifiers() const {
Qualifiers Quals;
if (hasLocalNonFastQualifiers())
  Quals = getExtQualsUnsafe()->getQualifiers();
Quals.addFastQualifiers(getLocalFastQualifiers());
return Quals;
6452}

6454inline Qualifiers QualType::getQualifiers() const {
Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers();
quals.addFastQualifiers(getLocalFastQualifiers());
return quals;
6458}

6460inline unsigned QualType::getCVRQualifiers() const {
unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers();
cvr |= getLocalCVRQualifiers();
return cvr;
6464}

6466inline QualType QualType::getCanonicalType() const {
QualType canon = getCommonPtr()->CanonicalType;
return canon.withFastQualifiers(getLocalFastQualifiers());
6469}

6471inline bool QualType::isCanonical() const {
return getTypePtr()->isCanonicalUnqualified();
6473}

6475inline bool QualType::isCanonicalAsParam() const {
if (!isCanonical()) return false;
if (hasLocalQualifiers()) return false;

const Type *T = getTypePtr();
if (T->isVariablyModifiedType() && T->hasSizedVLAType())
  return false;

return !isa<FunctionType>(T) && !isa<ArrayType>(T);
6484}

6486inline bool QualType::isConstQualified() const {
return isLocalConstQualified() ||
       getCommonPtr()->CanonicalType.isLocalConstQualified();
6489}

6491inline bool QualType::isRestrictQualified() const {
return isLocalRestrictQualified() ||
       getCommonPtr()->CanonicalType.isLocalRestrictQualified();
6494}


6497inline bool QualType::isVolatileQualified() const {
return isLocalVolatileQualified() ||
       getCommonPtr()->CanonicalType.isLocalVolatileQualified();
6500}

6502inline bool QualType::hasQualifiers() const {
return hasLocalQualifiers() ||
       getCommonPtr()->CanonicalType.hasLocalQualifiers();
6505}

6507inline QualType QualType::getUnqualifiedType() const {
if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers())
  return QualType(getTypePtr(), 0);

return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0);
6512}

6514inline SplitQualType QualType::getSplitUnqualifiedType() const {
if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers())
  return split();

return getSplitUnqualifiedTypeImpl(*this);
6519}

6521inline void QualType::removeLocalConst() {
removeLocalFastQualifiers(Qualifiers::Const);
6523}

6525inline void QualType::removeLocalRestrict() {
removeLocalFastQualifiers(Qualifiers::Restrict);
6527}

6529inline void QualType::removeLocalVolatile() {
removeLocalFastQualifiers(Qualifiers::Volatile);
6531}

6533inline void QualType::removeLocalCVRQualifiers(unsigned Mask) {
assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits")((void)0);
static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask,
              "Fast bits differ from CVR bits!");

// Fast path: we don't need to touch the slow qualifiers.
removeLocalFastQualifiers(Mask);
6540}

6542/// Check if this type has any address space qualifier.
6543inline bool QualType::hasAddressSpace() const {
return getQualifiers().hasAddressSpace();
6545}

6547/// Return the address space of this type.
6548inline LangAS QualType::getAddressSpace() const {
return getQualifiers().getAddressSpace();
6550}

6552/// Return the gc attribute of this type.
6553inline Qualifiers::GC QualType::getObjCGCAttr() const {
return getQualifiers().getObjCGCAttr();
6555}

6557inline bool QualType::hasNonTrivialToPrimitiveDefaultInitializeCUnion() const {
if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
  return hasNonTrivialToPrimitiveDefaultInitializeCUnion(RD);
return false;
6561}

6563inline bool QualType::hasNonTrivialToPrimitiveDestructCUnion() const {
if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
  return hasNonTrivialToPrimitiveDestructCUnion(RD);
return false;
6567}

6569inline bool QualType::hasNonTrivialToPrimitiveCopyCUnion() const {
if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
  return hasNonTrivialToPrimitiveCopyCUnion(RD);
return false;
6573}

6575inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) {
if (const auto *PT = t.getAs<PointerType>()) {
  if (const auto *FT = PT->getPointeeType()->getAs<FunctionType>())
    return FT->getExtInfo();
} else if (const auto *FT = t.getAs<FunctionType>())
  return FT->getExtInfo();

return FunctionType::ExtInfo();
6583}

6585inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) {
return getFunctionExtInfo(*t);
6587}

6589/// Determine whether this type is more
6590/// qualified than the Other type. For example, "const volatile int"
6591/// is more qualified than "const int", "volatile int", and
6592/// "int". However, it is not more qualified than "const volatile
6593/// int".
6594inline bool QualType::isMoreQualifiedThan(QualType other) const {
Qualifiers MyQuals = getQualifiers();
Qualifiers OtherQuals = other.getQualifiers();
return (MyQuals != OtherQuals && MyQuals.compatiblyIncludes(OtherQuals));
6598}

6600/// Determine whether this type is at last
6601/// as qualified as the Other type. For example, "const volatile
6602/// int" is at least as qualified as "const int", "volatile int",
6603/// "int", and "const volatile int".
6604inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const {
Qualifiers OtherQuals = other.getQualifiers();

// Ignore __unaligned qualifier if this type is a void.
if (getUnqualifiedType()->isVoidType())
  OtherQuals.removeUnaligned();

return getQualifiers().compatiblyIncludes(OtherQuals);
6612}

6614/// If Type is a reference type (e.g., const
6615/// int&), returns the type that the reference refers to ("const
6616/// int"). Otherwise, returns the type itself. This routine is used
6617/// throughout Sema to implement C++ 5p6:
6618///
6619///   If an expression initially has the type "reference to T" (8.3.2,
6620///   8.5.3), the type is adjusted to "T" prior to any further
6621///   analysis, the expression designates the object or function
6622///   denoted by the reference, and the expression is an lvalue.
6623inline QualType QualType::getNonReferenceType() const {
if (const auto *RefType = (*this)->getAs<ReferenceType>())
  return RefType->getPointeeType();
else
  return *this;
6628}

6630inline bool QualType::isCForbiddenLValueType() const {
return ((getTypePtr()->isVoidType() && !hasQualifiers()) ||
        getTypePtr()->isFunctionType());
6633}

6635/// Tests whether the type is categorized as a fundamental type.
6636///
6637/// \returns True for types specified in C++0x [basic.fundamental].
6638inline bool Type::isFundamentalType() const {
return isVoidType() ||
       isNullPtrType() ||
       // FIXME: It's really annoying that we don't have an
       // 'isArithmeticType()' which agrees with the standard definition.
       (isArithmeticType() && !isEnumeralType());
6644}

6646/// Tests whether the type is categorized as a compound type.
6647///
6648/// \returns True for types specified in C++0x [basic.compound].
6649inline bool Type::isCompoundType() const {
// C++0x [basic.compound]p1:
//   Compound types can be constructed in the following ways:
//    -- arrays of objects of a given type [...];
return isArrayType() ||
//    -- functions, which have parameters of given types [...];
       isFunctionType() ||
//    -- pointers to void or objects or functions [...];
       isPointerType() ||
//    -- references to objects or functions of a given type. [...]
       isReferenceType() ||
//    -- classes containing a sequence of objects of various types, [...];
       isRecordType() ||
//    -- unions, which are classes capable of containing objects of different
//               types at different times;
       isUnionType() ||
//    -- enumerations, which comprise a set of named constant values. [...];
       isEnumeralType() ||
//    -- pointers to non-static class members, [...].
       isMemberPointerType();
6669}

6671inline bool Type::isFunctionType() const {
return isa<FunctionType>(CanonicalType);
6673}

6675inline bool Type::isPointerType() const {
return isa<PointerType>(CanonicalType);
6677}

6679inline bool Type::isAnyPointerType() const {
return isPointerType() || isObjCObjectPointerType();
6681}

6683inline bool Type::isBlockPointerType() const {
return isa<BlockPointerType>(CanonicalType);
4
←
Assuming field 'CanonicalType' is a 'BlockPointerType'→
5
←
Returning the value 1, which participates in a condition later→
6685}

6687inline bool Type::isReferenceType() const {
return isa<ReferenceType>(CanonicalType);
6689}

6691inline bool Type::isLValueReferenceType() const {
return isa<LValueReferenceType>(CanonicalType);
6693}

6695inline bool Type::isRValueReferenceType() const {
return isa<RValueReferenceType>(CanonicalType);
6697}

6699inline bool Type::isObjectPointerType() const {
// Note: an "object pointer type" is not the same thing as a pointer to an
// object type; rather, it is a pointer to an object type or a pointer to cv
// void.
if (const auto *T = getAs<PointerType>())
  return !T->getPointeeType()->isFunctionType();
else
  return false;
6707}

6709inline bool Type::isFunctionPointerType() const {
if (const auto *T = getAs<PointerType>())
  return T->getPointeeType()->isFunctionType();
else
  return false;
6714}

6716inline bool Type::isFunctionReferenceType() const {
if (const auto *T = getAs<ReferenceType>())
  return T->getPointeeType()->isFunctionType();
else
  return false;
6721}

6723inline bool Type::isMemberPointerType() const {
return isa<MemberPointerType>(CanonicalType);
6725}

6727inline bool Type::isMemberFunctionPointerType() const {
if (const auto *T = getAs<MemberPointerType>())
  return T->isMemberFunctionPointer();
else
  return false;
6732}

6734inline bool Type::isMemberDataPointerType() const {
if (const auto *T = getAs<MemberPointerType>())
  return T->isMemberDataPointer();
else
  return false;
6739}

6741inline bool Type::isArrayType() const {
return isa<ArrayType>(CanonicalType);
6743}

6745inline bool Type::isConstantArrayType() const {
return isa<ConstantArrayType>(CanonicalType);
6747}

6749inline bool Type::isIncompleteArrayType() const {
return isa<IncompleteArrayType>(CanonicalType);
6751}

6753inline bool Type::isVariableArrayType() const {
return isa<VariableArrayType>(CanonicalType);
6755}

6757inline bool Type::isDependentSizedArrayType() const {
return isa<DependentSizedArrayType>(CanonicalType);
6759}

6761inline bool Type::isBuiltinType() const {
return isa<BuiltinType>(CanonicalType);
6763}

6765inline bool Type::isRecordType() const {
return isa<RecordType>(CanonicalType);
6767}

6769inline bool Type::isEnumeralType() const {
return isa<EnumType>(CanonicalType);
6771}

6773inline bool Type::isAnyComplexType() const {
return isa<ComplexType>(CanonicalType);
6775}

6777inline bool Type::isVectorType() const {
return isa<VectorType>(CanonicalType);
6779}

6781inline bool Type::isExtVectorType() const {
return isa<ExtVectorType>(CanonicalType);
6783}

6785inline bool Type::isMatrixType() const {
return isa<MatrixType>(CanonicalType);
6787}

6789inline bool Type::isConstantMatrixType() const {
return isa<ConstantMatrixType>(CanonicalType);
6791}

6793inline bool Type::isDependentAddressSpaceType() const {
return isa<DependentAddressSpaceType>(CanonicalType);
6795}

6797inline bool Type::isObjCObjectPointerType() const {
return isa<ObjCObjectPointerType>(CanonicalType);
6799}

6801inline bool Type::isObjCObjectType() const {
return isa<ObjCObjectType>(CanonicalType);
6803}

6805inline bool Type::isObjCObjectOrInterfaceType() const {
return isa<ObjCInterfaceType>(CanonicalType) ||
  isa<ObjCObjectType>(CanonicalType);
6808}

6810inline bool Type::isAtomicType() const {
return isa<AtomicType>(CanonicalType);
6812}

6814inline bool Type::isUndeducedAutoType() const {
return isa<AutoType>(CanonicalType);
6816}

6818inline bool Type::isObjCQualifiedIdType() const {
if (const auto *OPT = getAs<ObjCObjectPointerType>())
  return OPT->isObjCQualifiedIdType();
return false;
6822}

6824inline bool Type::isObjCQualifiedClassType() const {
if (const auto *OPT = getAs<ObjCObjectPointerType>())
  return OPT->isObjCQualifiedClassType();
return false;
6828}

6830inline bool Type::isObjCIdType() const {
if (const auto *OPT = getAs<ObjCObjectPointerType>())
  return OPT->isObjCIdType();
return false;
6834}

6836inline bool Type::isObjCClassType() const {
if (const auto *OPT = getAs<ObjCObjectPointerType>())
  return OPT->isObjCClassType();
return false;
6840}

6842inline bool Type::isObjCSelType() const {
if (const auto *OPT = getAs<PointerType>())
  return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel);
return false;
6846}

6848inline bool Type::isObjCBuiltinType() const {
return isObjCIdType() || isObjCClassType() || isObjCSelType();
6850}

6852inline bool Type::isDecltypeType() const {
return isa<DecltypeType>(this);
6854}

6856#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
inline bool Type::is##Id##Type() const { \
  return isSpecificBuiltinType(BuiltinType::Id); \
}
6860#include "clang/Basic/OpenCLImageTypes.def"

6862inline bool Type::isSamplerT() const {
return isSpecificBuiltinType(BuiltinType::OCLSampler);
6864}

6866inline bool Type::isEventT() const {
return isSpecificBuiltinType(BuiltinType::OCLEvent);
6868}

6870inline bool Type::isClkEventT() const {
return isSpecificBuiltinType(BuiltinType::OCLClkEvent);
6872}

6874inline bool Type::isQueueT() const {
return isSpecificBuiltinType(BuiltinType::OCLQueue);
6876}

6878inline bool Type::isReserveIDT() const {
return isSpecificBuiltinType(BuiltinType::OCLReserveID);
6880}

6882inline bool Type::isImageType() const {
6883#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) is##Id##Type() ||
return
6885#include "clang/Basic/OpenCLImageTypes.def"
    false; // end boolean or operation
6887}

6889inline bool Type::isPipeType() const {
return isa<PipeType>(CanonicalType);
6891}

6893inline bool Type::isExtIntType() const {
return isa<ExtIntType>(CanonicalType);
6895}

6897#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
inline bool Type::is##Id##Type() const { \
  return isSpecificBuiltinType(BuiltinType::Id); \
}
6901#include "clang/Basic/OpenCLExtensionTypes.def"

6903inline bool Type::isOCLIntelSubgroupAVCType() const {
6904#define INTEL_SUBGROUP_AVC_TYPE(ExtType, Id) \
isOCLIntelSubgroupAVC##Id##Type() ||
return
6907#include "clang/Basic/OpenCLExtensionTypes.def"
  false; // end of boolean or operation
6909}

6911inline bool Type::isOCLExtOpaqueType() const {
6912#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) is##Id##Type() ||
return
6914#include "clang/Basic/OpenCLExtensionTypes.def"
  false; // end of boolean or operation
6916}

6918inline bool Type::isOpenCLSpecificType() const {
return isSamplerT() || isEventT() || isImageType() || isClkEventT() ||
       isQueueT() || isReserveIDT() || isPipeType() || isOCLExtOpaqueType();
6921}

6923inline bool Type::isTemplateTypeParmType() const {
return isa<TemplateTypeParmType>(CanonicalType);
6925}

6927inline bool Type::isSpecificBuiltinType(unsigned K) const {
if (const BuiltinType *BT = getAs<BuiltinType>()) {
  return BT->getKind() == static_cast<BuiltinType::Kind>(K);
}
return false;
6932}

6934inline bool Type::isPlaceholderType() const {
if (const auto *BT = dyn_cast<BuiltinType>(this))
  return BT->isPlaceholderType();
return false;
6938}

6940inline const BuiltinType *Type::getAsPlaceholderType() const {
if (const auto *BT = dyn_cast<BuiltinType>(this))
  if (BT->isPlaceholderType())
    return BT;
return nullptr;
6945}

6947inline bool Type::isSpecificPlaceholderType(unsigned K) const {
assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K))((void)0);
return isSpecificBuiltinType(K);
6950}

6952inline bool Type::isNonOverloadPlaceholderType() const {
if (const auto *BT = dyn_cast<BuiltinType>(this))
  return BT->isNonOverloadPlaceholderType();
return false;
6956}

6958inline bool Type::isVoidType() const {
return isSpecificBuiltinType(BuiltinType::Void);
6960}

6962inline bool Type::isHalfType() const {
// FIXME: Should we allow complex __fp16? Probably not.
return isSpecificBuiltinType(BuiltinType::Half);
6965}

6967inline bool Type::isFloat16Type() const {
return isSpecificBuiltinType(BuiltinType::Float16);
6969}

6971inline bool Type::isBFloat16Type() const {
return isSpecificBuiltinType(BuiltinType::BFloat16);
6973}

6975inline bool Type::isFloat128Type() const {
return isSpecificBuiltinType(BuiltinType::Float128);
6977}

6979inline bool Type::isNullPtrType() const {
return isSpecificBuiltinType(BuiltinType::NullPtr);
6981}

6983bool IsEnumDeclComplete(EnumDecl *);
6984bool IsEnumDeclScoped(EnumDecl *);

6986inline bool Type::isIntegerType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() >= BuiltinType::Bool &&
         BT->getKind() <= BuiltinType::Int128;
if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
  // Incomplete enum types are not treated as integer types.
  // FIXME: In C++, enum types are never integer types.
  return IsEnumDeclComplete(ET->getDecl()) &&
    !IsEnumDeclScoped(ET->getDecl());
}
return isExtIntType();
6997}

6999inline bool Type::isFixedPointType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
  return BT->getKind() >= BuiltinType::ShortAccum &&
         BT->getKind() <= BuiltinType::SatULongFract;
}
return false;
7005}

7007inline bool Type::isFixedPointOrIntegerType() const {
return isFixedPointType() || isIntegerType();
7009}

7011inline bool Type::isSaturatedFixedPointType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
  return BT->getKind() >= BuiltinType::SatShortAccum &&
         BT->getKind() <= BuiltinType::SatULongFract;
}
return false;
7017}

7019inline bool Type::isUnsaturatedFixedPointType() const {
return isFixedPointType() && !isSaturatedFixedPointType();
7021}

7023inline bool Type::isSignedFixedPointType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
  return ((BT->getKind() >= BuiltinType::ShortAccum &&
           BT->getKind() <= BuiltinType::LongAccum) ||
          (BT->getKind() >= BuiltinType::ShortFract &&
           BT->getKind() <= BuiltinType::LongFract) ||
          (BT->getKind() >= BuiltinType::SatShortAccum &&
           BT->getKind() <= BuiltinType::SatLongAccum) ||
          (BT->getKind() >= BuiltinType::SatShortFract &&
           BT->getKind() <= BuiltinType::SatLongFract));
}
return false;
7035}

7037inline bool Type::isUnsignedFixedPointType() const {
return isFixedPointType() && !isSignedFixedPointType();
7039}

7041inline bool Type::isScalarType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() > BuiltinType::Void &&
         BT->getKind() <= BuiltinType::NullPtr;
if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
  // Enums are scalar types, but only if they are defined.  Incomplete enums
  // are not treated as scalar types.
  return IsEnumDeclComplete(ET->getDecl());
return isa<PointerType>(CanonicalType) ||
       isa<BlockPointerType>(CanonicalType) ||
       isa<MemberPointerType>(CanonicalType) ||
       isa<ComplexType>(CanonicalType) ||
       isa<ObjCObjectPointerType>(CanonicalType) ||
       isExtIntType();
7055}

7057inline bool Type::isIntegralOrEnumerationType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() >= BuiltinType::Bool &&
         BT->getKind() <= BuiltinType::Int128;

// Check for a complete enum type; incomplete enum types are not properly an
// enumeration type in the sense required here.
if (const auto *ET = dyn_cast<EnumType>(CanonicalType))
  return IsEnumDeclComplete(ET->getDecl());

return isExtIntType();
7068}

7070inline bool Type::isBooleanType() const {
if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
  return BT->getKind() == BuiltinType::Bool;
return false;
7074}

7076inline bool Type::isUndeducedType() const {
auto *DT = getContainedDeducedType();
return DT && !DT->isDeduced();
7079}

7081/// Determines whether this is a type for which one can define
7082/// an overloaded operator.
7083inline bool Type::isOverloadableType() const {
return isDependentType() || isRecordType() || isEnumeralType();
7085}

7087/// Determines whether this type is written as a typedef-name.
7088inline bool Type::isTypedefNameType() const {
if (getAs<TypedefType>())
  return true;
if (auto *TST = getAs<TemplateSpecializationType>())
  return TST->isTypeAlias();
return false;
7094}

7096/// Determines whether this type can decay to a pointer type.
7097inline bool Type::canDecayToPointerType() const {
return isFunctionType() || isArrayType();
7099}

7101inline bool Type::hasPointerRepresentation() const {
return (isPointerType() || isReferenceType() || isBlockPointerType() ||
        isObjCObjectPointerType() || isNullPtrType());
7104}

7106inline bool Type::hasObjCPointerRepresentation() const {
return isObjCObjectPointerType();
7108}

7110inline const Type *Type::getBaseElementTypeUnsafe() const {
const Type *type = this;
while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe())
  type = arrayType->getElementType().getTypePtr();
return type;
7115}

7117inline const Type *Type::getPointeeOrArrayElementType() const {
const Type *type = this;
if (type->isAnyPointerType())
  return type->getPointeeType().getTypePtr();
else if (type->isArrayType())
  return type->getBaseElementTypeUnsafe();
return type;
7124}
7125/// Insertion operator for partial diagnostics. This allows sending adress
7126/// spaces into a diagnostic with <<.
7127inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD,
                                           LangAS AS) {
PD.AddTaggedVal(static_cast<std::underlying_type_t<LangAS>>(AS),
                DiagnosticsEngine::ArgumentKind::ak_addrspace);
return PD;
7132}

7134/// Insertion operator for partial diagnostics. This allows sending Qualifiers
7135/// into a diagnostic with <<.
7136inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD,
                                           Qualifiers Q) {
PD.AddTaggedVal(Q.getAsOpaqueValue(),
                DiagnosticsEngine::ArgumentKind::ak_qual);
return PD;
7141}

7143/// Insertion operator for partial diagnostics.  This allows sending QualType's
7144/// into a diagnostic with <<.
7145inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD,
                                           QualType T) {
PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()),
                DiagnosticsEngine::ak_qualtype);
return PD;
7150}

7152// Helper class template that is used by Type::getAs to ensure that one does
7153// not try to look through a qualified type to get to an array type.
7154template <typename T>
7155using TypeIsArrayType =
  std::integral_constant<bool, std::is_same<T, ArrayType>::value ||
                                   std::is_base_of<ArrayType, T>::value>;

7159// Member-template getAs<specific type>'.
7160template <typename T> const T *Type::getAs() const {
static_assert(!TypeIsArrayType<T>::value,
              "ArrayType cannot be used with getAs!");

// If this is directly a T type, return it.
if (const auto *Ty = dyn_cast<T>(this))
  return Ty;

// If the canonical form of this type isn't the right kind, reject it.
if (!isa<T>(CanonicalType))
  return nullptr;

// If this is a typedef for the type, strip the typedef off without
// losing all typedef information.
return cast<T>(getUnqualifiedDesugaredType());
7175}

7177template <typename T> const T *Type::getAsAdjusted() const {
static_assert(!TypeIsArrayType<T>::value, "ArrayType cannot be used with getAsAdjusted!");

// If this is directly a T type, return it.
if (const auto *Ty = dyn_cast<T>(this))
  return Ty;

// If the canonical form of this type isn't the right kind, reject it.
if (!isa<T>(CanonicalType))
  return nullptr;

// Strip off type adjustments that do not modify the underlying nature of the
// type.
const Type *Ty = this;
while (Ty) {
  if (const auto *A = dyn_cast<AttributedType>(Ty))
    Ty = A->getModifiedType().getTypePtr();
  else if (const auto *E = dyn_cast<ElaboratedType>(Ty))
    Ty = E->desugar().getTypePtr();
  else if (const auto *P = dyn_cast<ParenType>(Ty))
    Ty = P->desugar().getTypePtr();
  else if (const auto *A = dyn_cast<AdjustedType>(Ty))
    Ty = A->desugar().getTypePtr();
  else if (const auto *M = dyn_cast<MacroQualifiedType>(Ty))
    Ty = M->desugar().getTypePtr();
  else
    break;
}

// Just because the canonical type is correct does not mean we can use cast<>,
// since we may not have stripped off all the sugar down to the base type.
return dyn_cast<T>(Ty);
7209}

7211inline const ArrayType *Type::getAsArrayTypeUnsafe() const {
// If this is directly an array type, return it.
if (const auto *arr = dyn_cast<ArrayType>(this))
  return arr;

// If the canonical form of this type isn't the right kind, reject it.
if (!isa<ArrayType>(CanonicalType))
  return nullptr;

// If this is a typedef for the type, strip the typedef off without
// losing all typedef information.
return cast<ArrayType>(getUnqualifiedDesugaredType());
7223}

7225template <typename T> const T *Type::castAs() const {
static_assert(!TypeIsArrayType<T>::value,
              "ArrayType cannot be used with castAs!");

if (const auto *ty = dyn_cast<T>(this)) return ty;
assert(isa<T>(CanonicalType))((void)0);
return cast<T>(getUnqualifiedDesugaredType());
7232}

7234inline const ArrayType *Type::castAsArrayTypeUnsafe() const {
assert(isa<ArrayType>(CanonicalType))((void)0);
if (const auto *arr = dyn_cast<ArrayType>(this)) return arr;
return cast<ArrayType>(getUnqualifiedDesugaredType());
7238}

7240DecayedType::DecayedType(QualType OriginalType, QualType DecayedPtr,
                       QualType CanonicalPtr)
  : AdjustedType(Decayed, OriginalType, DecayedPtr, CanonicalPtr) {
7243#ifndef NDEBUG1
QualType Adjusted = getAdjustedType();
(void)AttributedType::stripOuterNullability(Adjusted);
assert(isa<PointerType>(Adjusted))((void)0);
7247#endif
7248}

7250QualType DecayedType::getPointeeType() const {
QualType Decayed = getDecayedType();
(void)AttributedType::stripOuterNullability(Decayed);
return cast<PointerType>(Decayed)->getPointeeType();
7254}

7256// Get the decimal string representation of a fixed point type, represented
7257// as a scaled integer.
7258// TODO: At some point, we should change the arguments to instead just accept an
7259// APFixedPoint instead of APSInt and scale.
7260void FixedPointValueToString(SmallVectorImpl<char> &Str, llvm::APSInt Val,
                           unsigned Scale);

7263} // namespace clang

7265#endif // LLVM_CLANG_AST_TYPE_H