src/third_party/llvm-project/lldb/source/Plugins/Language/CPlusPlus/LibCxxAtomic.cpp

//===-- LibCxxAtomic.cpp ------------------------------------------*- C++
//-*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "LibCxxAtomic.h"

using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::formatters;

bool lldb_private::formatters::LibCxxAtomicSummaryProvider(
    ValueObject &valobj, Stream &stream, const TypeSummaryOptions &options) {
  static ConstString g___a_("__a_");

  if (ValueObjectSP child = valobj.GetChildMemberWithName(g___a_, true)) {
    std::string summary;
    if (child->GetSummaryAsCString(summary, options) && summary.size() > 0) {
      stream.Printf("%s", summary.c_str());
      return true;
    }
  }

  return false;
}

namespace lldb_private {
namespace formatters {
class LibcxxStdAtomicSyntheticFrontEnd : public SyntheticChildrenFrontEnd {
public:
  LibcxxStdAtomicSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp);

  ~LibcxxStdAtomicSyntheticFrontEnd() override = default;

  size_t CalculateNumChildren() override;

  lldb::ValueObjectSP GetChildAtIndex(size_t idx) override;

  bool Update() override;

  bool MightHaveChildren() override;

  size_t GetIndexOfChildWithName(const ConstString &name) override;

  lldb::ValueObjectSP GetSyntheticValue() override;

private:
  ValueObject *m_real_child;
};
} // namespace formatters
} // namespace lldb_private

lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
    LibcxxStdAtomicSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp)
    : SyntheticChildrenFrontEnd(*valobj_sp), m_real_child(nullptr) {}

bool lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::Update() {
  static ConstString g___a_("__a_");

  m_real_child = m_backend.GetChildMemberWithName(g___a_, true).get();

  return false;
}

bool lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
    MightHaveChildren() {
  return true;
}

size_t lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
    CalculateNumChildren() {
  return m_real_child ? m_real_child->GetNumChildren() : 0;
}

lldb::ValueObjectSP
lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::GetChildAtIndex(
    size_t idx) {
  return m_real_child ? m_real_child->GetChildAtIndex(idx, true) : nullptr;
}

size_t lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
    GetIndexOfChildWithName(const ConstString &name) {
  return m_real_child ? m_real_child->GetIndexOfChildWithName(name)
                      : UINT32_MAX;
}

lldb::ValueObjectSP lldb_private::formatters::LibcxxStdAtomicSyntheticFrontEnd::
    GetSyntheticValue() {
  if (m_real_child && m_real_child->CanProvideValue())
    return m_real_child->GetSP();
  return nullptr;
}

SyntheticChildrenFrontEnd *
lldb_private::formatters::LibcxxAtomicSyntheticFrontEndCreator(
    CXXSyntheticChildren *, lldb::ValueObjectSP valobj_sp) {
  if (valobj_sp)
    return new LibcxxStdAtomicSyntheticFrontEnd(valobj_sp);
  return nullptr;
}