llvm-project/lldb/source/Plugins/Language/CPlusPlus/LibCxxQueue.cpp

61 lines
1.7 KiB
C++

//===-- LibCxxQueue.cpp -----------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "LibCxx.h"
#include "lldb/DataFormatters/FormattersHelpers.h"
using namespace lldb;
using namespace lldb_private;
namespace {
class QueueFrontEnd : public SyntheticChildrenFrontEnd {
public:
QueueFrontEnd(ValueObject &valobj) : SyntheticChildrenFrontEnd(valobj) {
Update();
}
size_t GetIndexOfChildWithName(ConstString name) override {
return m_container_sp ? m_container_sp->GetIndexOfChildWithName(name)
: UINT32_MAX;
}
bool MightHaveChildren() override { return true; }
bool Update() override;
size_t CalculateNumChildren() override {
return m_container_sp ? m_container_sp->GetNumChildren() : 0;
}
ValueObjectSP GetChildAtIndex(size_t idx) override {
return m_container_sp ? m_container_sp->GetChildAtIndex(idx, true)
: nullptr;
}
private:
ValueObjectSP m_container_sp;
};
} // namespace
bool QueueFrontEnd::Update() {
m_container_sp.reset();
ValueObjectSP c_sp = m_backend.GetChildMemberWithName(ConstString("c"), true);
if (!c_sp)
return false;
m_container_sp = c_sp->GetSyntheticValue();
return false;
}
SyntheticChildrenFrontEnd *
formatters::LibcxxQueueFrontEndCreator(CXXSyntheticChildren *,
lldb::ValueObjectSP valobj_sp) {
if (valobj_sp)
return new QueueFrontEnd(*valobj_sp);
return nullptr;
}