1 | //===- IPDBEnumChildren.h - base interface for child enumerator -*- C++ -*-===// |
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 | #ifndef LLVM_DEBUGINFO_PDB_IPDBENUMCHILDREN_H |
10 | #define LLVM_DEBUGINFO_PDB_IPDBENUMCHILDREN_H |
11 | |
12 | #include "llvm/DebugInfo/CodeView/LazyRandomTypeCollection.h" |
13 | #include <cassert> |
14 | #include <cstdint> |
15 | #include <memory> |
16 | |
17 | namespace llvm { |
18 | namespace pdb { |
19 | |
20 | template <typename ChildType> class IPDBEnumChildren { |
21 | public: |
22 | using ChildTypePtr = std::unique_ptr<ChildType>; |
23 | using MyType = IPDBEnumChildren<ChildType>; |
24 | |
25 | virtual ~IPDBEnumChildren() = default; |
26 | |
27 | virtual uint32_t getChildCount() const = 0; |
28 | virtual ChildTypePtr getChildAtIndex(uint32_t Index) const = 0; |
29 | virtual ChildTypePtr getNext() = 0; |
30 | virtual void reset() = 0; |
31 | }; |
32 | |
33 | template <typename ChildType> |
34 | class NullEnumerator : public IPDBEnumChildren<ChildType> { |
35 | uint32_t getChildCount() const override { return 0; } |
36 | std::unique_ptr<ChildType> getChildAtIndex(uint32_t Index) const override { |
37 | return nullptr; |
38 | } |
39 | std::unique_ptr<ChildType> getNext() override { return nullptr; } |
40 | void reset() override {} |
41 | }; |
42 | |
43 | } // end namespace pdb |
44 | } // end namespace llvm |
45 | |
46 | #endif // LLVM_DEBUGINFO_PDB_IPDBENUMCHILDREN_H |
47 | |