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84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
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//===-- LibCxxTuple.cpp -----------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "LibCxx.h"
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#include "lldb/DataFormatters/FormattersHelpers.h"
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using namespace lldb;
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using namespace lldb_private;
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namespace {
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class TupleFrontEnd: public SyntheticChildrenFrontEnd {
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public:
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TupleFrontEnd(ValueObject &valobj) : SyntheticChildrenFrontEnd(valobj) {
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Update();
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}
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size_t GetIndexOfChildWithName(const ConstString &name) override {
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return formatters::ExtractIndexFromString(name.GetCString());
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}
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bool MightHaveChildren() override { return true; }
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bool Update() override;
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size_t CalculateNumChildren() override { return m_elements.size(); }
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ValueObjectSP GetChildAtIndex(size_t idx) override;
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private:
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std::vector<ValueObjectSP> m_elements;
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ValueObjectSP m_base_sp;
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};
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}
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bool TupleFrontEnd::Update() {
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m_elements.clear();
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m_base_sp = m_backend.GetChildMemberWithName(ConstString("__base_"), true);
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if (! m_base_sp) {
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// Pre r304382 name of the base element.
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m_base_sp = m_backend.GetChildMemberWithName(ConstString("base_"), true);
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}
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if (! m_base_sp)
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return false;
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m_elements.assign(m_base_sp->GetCompilerType().GetNumDirectBaseClasses(),
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ValueObjectSP());
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return false;
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}
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ValueObjectSP TupleFrontEnd::GetChildAtIndex(size_t idx) {
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if (idx >= m_elements.size())
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return ValueObjectSP();
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if (!m_base_sp)
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return ValueObjectSP();
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if (m_elements[idx])
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return m_elements[idx];
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CompilerType holder_type =
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m_base_sp->GetCompilerType().GetDirectBaseClassAtIndex(idx, nullptr);
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if (!holder_type)
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return ValueObjectSP();
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ValueObjectSP holder_sp = m_base_sp->GetChildAtIndex(idx, true);
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if (!holder_sp)
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return ValueObjectSP();
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ValueObjectSP elem_sp = holder_sp->GetChildAtIndex(0, true);
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if (elem_sp)
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m_elements[idx] =
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elem_sp->Clone(ConstString(llvm::formatv("[{0}]", idx).str()));
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return m_elements[idx];
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}
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SyntheticChildrenFrontEnd *
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formatters::LibcxxTupleFrontEndCreator(CXXSyntheticChildren *,
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lldb::ValueObjectSP valobj_sp) {
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if (valobj_sp)
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return new TupleFrontEnd(*valobj_sp);
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return nullptr;
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}
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