1 //===-- LibCxxQueue.cpp -----------------------------------------*- 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 #include "LibCxx.h" 10 #include "lldb/DataFormatters/FormattersHelpers.h" 11 12 using namespace lldb; 13 using namespace lldb_private; 14 15 namespace { 16 17 class QueueFrontEnd : public SyntheticChildrenFrontEnd { 18 public: 19 QueueFrontEnd(ValueObject &valobj) : SyntheticChildrenFrontEnd(valobj) { 20 Update(); 21 } 22 23 size_t GetIndexOfChildWithName(ConstString name) override { 24 return m_container_sp ? m_container_sp->GetIndexOfChildWithName(name) 25 : UINT32_MAX; 26 } 27 28 bool MightHaveChildren() override { return true; } 29 bool Update() override; 30 31 size_t CalculateNumChildren() override { 32 return m_container_sp ? m_container_sp->GetNumChildren() : 0; 33 } 34 35 ValueObjectSP GetChildAtIndex(size_t idx) override { 36 return m_container_sp ? m_container_sp->GetChildAtIndex(idx, true) 37 : nullptr; 38 } 39 40 private: 41 ValueObjectSP m_container_sp; 42 }; 43 } // namespace 44 45 bool QueueFrontEnd::Update() { 46 m_container_sp.reset(); 47 ValueObjectSP c_sp = m_backend.GetChildMemberWithName(ConstString("c"), true); 48 if (!c_sp) 49 return false; 50 m_container_sp = c_sp->GetSyntheticValue(); 51 return false; 52 } 53 54 SyntheticChildrenFrontEnd * 55 formatters::LibcxxQueueFrontEndCreator(CXXSyntheticChildren *, 56 lldb::ValueObjectSP valobj_sp) { 57 if (valobj_sp) 58 return new QueueFrontEnd(*valobj_sp); 59 return nullptr; 60 } 61