polymorphic_downcast.h

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/*
 * Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#ifndef __NNFW_MISC_POLYMORPHIC_DOWNCAST_H__
#define __NNFW_MISC_POLYMORPHIC_DOWNCAST_H__
 
#include <cassert>
#include <memory>
 
namespace nnfw
{
namespace misc
{
 
template <typename DstType, typename SrcType> inline DstType polymorphic_downcast(SrcType *x)
{
  assert(dynamic_cast<DstType>(x) == x);
  return static_cast<DstType>(x);
}
 
template <typename DstType, typename SrcType> inline DstType polymorphic_downcast(SrcType &x)
{
  assert(std::addressof(dynamic_cast<DstType>(x)) == std::addressof(x));
  return static_cast<DstType>(x);
}
 
} // namespace misc
} // namespace nnfw
 
#endif // __NNFW_MISC_POLYMORPHIC_DOWNCAST_H__