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
17namespace llvm {
18namespace pdb {
19
20template <typename ChildType> class IPDBEnumChildren {
21public:
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
33template <typename ChildType>
34class 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

source code of llvm/include/llvm/DebugInfo/PDB/IPDBEnumChildren.h