287b9447cc
Adds formatters for MSVC STL's unordered containers. This one is relatively simple, because it can reuse the `std::list` synthetic children. The unordered containers (aka [`_Hash`](313964b78a/stl/inc/xhash (L327))) contain a [`_List`](313964b78a/stl/inc/xhash (L2012)) which contains all elements (and is used for iterating through the container). Towards https://github.com/llvm/llvm-project/issues/24834.
70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
//===-- MsvcStlUnordered.cpp ----------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "MsvcStl.h"
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#include "lldb/DataFormatters/TypeSynthetic.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 UnorderedFrontEnd : public SyntheticChildrenFrontEnd {
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public:
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UnorderedFrontEnd(ValueObject &valobj) : SyntheticChildrenFrontEnd(valobj) {
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Update();
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}
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llvm::Expected<size_t> GetIndexOfChildWithName(ConstString name) override {
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if (!m_list_sp)
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return llvm::createStringError("Missing _List");
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return m_list_sp->GetIndexOfChildWithName(name);
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}
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lldb::ChildCacheState Update() override;
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llvm::Expected<uint32_t> CalculateNumChildren() override {
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if (!m_list_sp)
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return llvm::createStringError("Missing _List");
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return m_list_sp->GetNumChildren();
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}
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ValueObjectSP GetChildAtIndex(uint32_t idx) override {
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if (!m_list_sp)
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return nullptr;
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return m_list_sp->GetChildAtIndex(idx);
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}
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private:
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ValueObjectSP m_list_sp;
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};
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} // namespace
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lldb::ChildCacheState UnorderedFrontEnd::Update() {
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m_list_sp = nullptr;
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ValueObjectSP list_sp = m_backend.GetChildMemberWithName("_List");
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if (!list_sp)
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return lldb::ChildCacheState::eRefetch;
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m_list_sp = list_sp->GetSyntheticValue();
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return lldb::ChildCacheState::eRefetch;
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}
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bool formatters::IsMsvcStlUnordered(ValueObject &valobj) {
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if (auto valobj_sp = valobj.GetNonSyntheticValue())
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return valobj_sp->GetChildMemberWithName("_List") != nullptr;
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return false;
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}
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SyntheticChildrenFrontEnd *formatters::MsvcStlUnorderedSyntheticFrontEndCreator(
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CXXSyntheticChildren *, lldb::ValueObjectSP valobj_sp) {
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if (valobj_sp)
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return new UnorderedFrontEnd(*valobj_sp);
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return nullptr;
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}
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