IndexIterator.h

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/*
 * Copyright (c) 2018 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_TENSOR_INDEX_ITERATOR_H__
#define __NNFW_MISC_TENSOR_INDEX_ITERATOR_H__
 
#include "misc/tensor/Shape.h"
#include "misc/tensor/Index.h"
#include "misc/tensor/IndexEnumerator.h"
 
namespace nnfw
{
namespace misc
{
namespace tensor
{
 
class IndexIterator
{
public:
  IndexIterator(const Shape &shape) : _shape(shape)
  {
    // DO NOTHING
  }
 
public:
  IndexIterator(IndexIterator &&) = default;
 
  IndexIterator(const IndexIterator &) = delete;
 
public:
  template <typename Callable> IndexIterator &iter(Callable fn)
  {
    for (IndexEnumerator e{_shape}; e.valid(); e.advance())
    {
      fn(e.curr());
    }
 
    return (*this);
  }
 
private:
  const Shape &_shape;
};
 
inline IndexIterator iterate(const Shape &shape) { return IndexIterator{shape}; }
 
template <typename Callable> IndexIterator &operator<<(IndexIterator &&it, Callable cb)
{
  return it.iter(cb);
}
 
} // namespace tensor
} // namespace misc
} // namespace nnfw
 
#endif // __NNFW_MISC_TENSOR_INDEX_ITERATOR_H__