| 1 | //===-- LibCxxRangesRefView.cpp -------------------------------------------===// |
|---|---|
| 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 | |
| 11 | #include "lldb/Core/ValueObject.h" |
| 12 | #include "lldb/DataFormatters/FormattersHelpers.h" |
| 13 | #include "lldb/Utility/ConstString.h" |
| 14 | #include "llvm/ADT/APSInt.h" |
| 15 | |
| 16 | using namespace lldb; |
| 17 | using namespace lldb_private; |
| 18 | using namespace lldb_private::formatters; |
| 19 | |
| 20 | namespace lldb_private { |
| 21 | namespace formatters { |
| 22 | |
| 23 | class LibcxxStdRangesRefViewSyntheticFrontEnd |
| 24 | : public SyntheticChildrenFrontEnd { |
| 25 | public: |
| 26 | LibcxxStdRangesRefViewSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp); |
| 27 | |
| 28 | ~LibcxxStdRangesRefViewSyntheticFrontEnd() override = default; |
| 29 | |
| 30 | llvm::Expected<uint32_t> CalculateNumChildren() override { |
| 31 | // __range_ will be the sole child of this type |
| 32 | return 1; |
| 33 | } |
| 34 | |
| 35 | lldb::ValueObjectSP GetChildAtIndex(uint32_t idx) override { |
| 36 | // Since we only have a single child, return it |
| 37 | assert(idx == 0); |
| 38 | return m_range_sp; |
| 39 | } |
| 40 | |
| 41 | lldb::ChildCacheState Update() override; |
| 42 | |
| 43 | bool MightHaveChildren() override { return true; } |
| 44 | |
| 45 | size_t GetIndexOfChildWithName(ConstString name) override { |
| 46 | // We only have a single child |
| 47 | return 0; |
| 48 | } |
| 49 | |
| 50 | private: |
| 51 | /// Pointer to the dereferenced __range_ member |
| 52 | lldb::ValueObjectSP m_range_sp = nullptr; |
| 53 | }; |
| 54 | |
| 55 | lldb_private::formatters::LibcxxStdRangesRefViewSyntheticFrontEnd:: |
| 56 | LibcxxStdRangesRefViewSyntheticFrontEnd(lldb::ValueObjectSP valobj_sp) |
| 57 | : SyntheticChildrenFrontEnd(*valobj_sp) { |
| 58 | if (valobj_sp) |
| 59 | Update(); |
| 60 | } |
| 61 | |
| 62 | lldb::ChildCacheState |
| 63 | lldb_private::formatters::LibcxxStdRangesRefViewSyntheticFrontEnd::Update() { |
| 64 | ValueObjectSP range_ptr = |
| 65 | GetChildMemberWithName(obj&: m_backend, alternative_names: {ConstString("__range_")}); |
| 66 | if (!range_ptr) |
| 67 | return lldb::ChildCacheState::eRefetch; |
| 68 | |
| 69 | lldb_private::Status error; |
| 70 | m_range_sp = range_ptr->Dereference(error); |
| 71 | |
| 72 | return error.Success() ? lldb::ChildCacheState::eReuse |
| 73 | : lldb::ChildCacheState::eRefetch; |
| 74 | } |
| 75 | |
| 76 | lldb_private::SyntheticChildrenFrontEnd * |
| 77 | LibcxxStdRangesRefViewSyntheticFrontEndCreator(CXXSyntheticChildren *, |
| 78 | lldb::ValueObjectSP valobj_sp) { |
| 79 | if (!valobj_sp) |
| 80 | return nullptr; |
| 81 | CompilerType type = valobj_sp->GetCompilerType(); |
| 82 | if (!type.IsValid()) |
| 83 | return nullptr; |
| 84 | return new LibcxxStdRangesRefViewSyntheticFrontEnd(valobj_sp); |
| 85 | } |
| 86 | |
| 87 | } // namespace formatters |
| 88 | } // namespace lldb_private |
| 89 |