808142876c
Summary: A *.cpp file header in LLDB (and in LLDB) should like this: ``` //===-- TestUtilities.cpp -------------------------------------------------===// ``` However in LLDB most of our source files have arbitrary changes to this format and these changes are spreading through LLDB as folks usually just use the existing source files as templates for their new files (most notably the unnecessary editor language indicator `-*- C++ -*-` is spreading and in every review someone is pointing out that this is wrong, resulting in people pointing out that this is done in the same way in other files). This patch removes most of these inconsistencies including the editor language indicators, all the different missing/additional '-' characters, files that center the file name, missing trailing `===//` (mostly caused by clang-format breaking the line). Reviewers: aprantl, espindola, jfb, shafik, JDevlieghere Reviewed By: JDevlieghere Subscribers: dexonsmith, wuzish, emaste, sdardis, nemanjai, kbarton, MaskRay, atanasyan, arphaman, jfb, abidh, jsji, JDevlieghere, usaxena95, lldb-commits Tags: #lldb Differential Revision: https://reviews.llvm.org/D73258
84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
//===-- LibCxxOptional.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 "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 OptionalFrontEnd : public SyntheticChildrenFrontEnd {
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public:
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OptionalFrontEnd(ValueObject &valobj) : SyntheticChildrenFrontEnd(valobj) {
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Update();
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}
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size_t GetIndexOfChildWithName(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_size; }
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ValueObjectSP GetChildAtIndex(size_t idx) override;
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private:
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size_t m_size = 0;
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};
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} // namespace
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bool OptionalFrontEnd::Update() {
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ValueObjectSP engaged_sp(
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m_backend.GetChildMemberWithName(ConstString("__engaged_"), true));
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if (!engaged_sp)
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return false;
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// __engaged_ is a bool flag and is true if the optional contains a value.
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// Converting it to unsigned gives us a size of 1 if it contains a value
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// and 0 if not.
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m_size = engaged_sp->GetValueAsUnsigned(0);
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return false;
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}
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ValueObjectSP OptionalFrontEnd::GetChildAtIndex(size_t idx) {
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if (idx >= m_size)
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return ValueObjectSP();
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// __val_ contains the underlying value of an optional if it has one.
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// Currently because it is part of an anonymous union GetChildMemberWithName()
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// does not peer through and find it unless we are at the parent itself.
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// We can obtain the parent through __engaged_.
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ValueObjectSP val_sp(
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m_backend.GetChildMemberWithName(ConstString("__engaged_"), true)
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->GetParent()
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->GetChildAtIndex(0, true)
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->GetChildMemberWithName(ConstString("__val_"), true));
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if (!val_sp)
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return ValueObjectSP();
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CompilerType holder_type = val_sp->GetCompilerType();
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if (!holder_type)
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return ValueObjectSP();
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return val_sp->Clone(ConstString(llvm::formatv("Value").str()));
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}
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SyntheticChildrenFrontEnd *
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formatters::LibcxxOptionalFrontEndCreator(CXXSyntheticChildren *,
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lldb::ValueObjectSP valobj_sp) {
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if (valobj_sp)
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return new OptionalFrontEnd(*valobj_sp);
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return nullptr;
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}
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