Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- IPDBEnumChildren.h - base interface for child enumerator -*- C++ -*-===//

//

// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

// See https://llvm.org/LICENSE.txt for license information.

// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_DEBUGINFO_PDB_IPDBENUMCHILDREN_H

#define LLVM_DEBUGINFO_PDB_IPDBENUMCHILDREN_H

#include "llvm/DebugInfo/CodeView/LazyRandomTypeCollection.h"

#include <cassert>

#include <cstdint>

#include <memory>

namespace llvm {

namespace pdb {

template <typename ChildType> class IPDBEnumChildren {

public:

  using ChildTypePtr = std::unique_ptr<ChildType>;

  using MyType = IPDBEnumChildren<ChildType>;

  virtual ~IPDBEnumChildren() = default;

  virtual uint32_t getChildCount() const = 0;

  virtual ChildTypePtr getChildAtIndex(uint32_t Index) const = 0;

  virtual ChildTypePtr getNext() = 0;

  virtual void reset() = 0;

};

template <typename ChildType>

class NullEnumerator : public IPDBEnumChildren<ChildType> {

  uint32_t getChildCount() const override { return 0; }

  std::unique_ptr<ChildType> getChildAtIndex(uint32_t Index) const override {

    return nullptr;

  }

  std::unique_ptr<ChildType> getNext() override { return nullptr; }

  void reset() override {}

};

} // end namespace pdb

} // end namespace llvm

#endif // LLVM_DEBUGINFO_PDB_IPDBENUMCHILDREN_H