1 //===-- LibCxxTuple.cpp -----------------------------------------*- C++ -*-===//
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
7 //===----------------------------------------------------------------------===//
10 #include "lldb/DataFormatters/FormattersHelpers.h"
13 using namespace lldb_private;
17 class TupleFrontEnd: public SyntheticChildrenFrontEnd {
19 TupleFrontEnd(ValueObject &valobj) : SyntheticChildrenFrontEnd(valobj) {
23 size_t GetIndexOfChildWithName(ConstString name) override {
24 return formatters::ExtractIndexFromString(name.GetCString());
27 bool MightHaveChildren() override { return true; }
28 bool Update() override;
29 size_t CalculateNumChildren() override { return m_elements.size(); }
30 ValueObjectSP GetChildAtIndex(size_t idx) override;
33 std::vector<ValueObjectSP> m_elements;
34 ValueObjectSP m_base_sp;
38 bool TupleFrontEnd::Update() {
40 m_base_sp = m_backend.GetChildMemberWithName(ConstString("__base_"), true);
42 // Pre r304382 name of the base element.
43 m_base_sp = m_backend.GetChildMemberWithName(ConstString("base_"), true);
47 m_elements.assign(m_base_sp->GetCompilerType().GetNumDirectBaseClasses(),
52 ValueObjectSP TupleFrontEnd::GetChildAtIndex(size_t idx) {
53 if (idx >= m_elements.size())
54 return ValueObjectSP();
56 return ValueObjectSP();
58 return m_elements[idx];
60 CompilerType holder_type =
61 m_base_sp->GetCompilerType().GetDirectBaseClassAtIndex(idx, nullptr);
63 return ValueObjectSP();
64 ValueObjectSP holder_sp = m_base_sp->GetChildAtIndex(idx, true);
66 return ValueObjectSP();
68 ValueObjectSP elem_sp = holder_sp->GetChildAtIndex(0, true);
71 elem_sp->Clone(ConstString(llvm::formatv("[{0}]", idx).str()));
73 return m_elements[idx];
76 SyntheticChildrenFrontEnd *
77 formatters::LibcxxTupleFrontEndCreator(CXXSyntheticChildren *,
78 lldb::ValueObjectSP valobj_sp) {
80 return new TupleFrontEnd(*valobj_sp);