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/*
* Copyright (c) 2018-2019 Arm Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef ARM_COMPUTE_MISC_ITERABLE_H
#define ARM_COMPUTE_MISC_ITERABLE_H
#include <iterator>
namespace arm_compute
{
namespace utils
{
namespace iterable
{
/** Reverse range iterable class
*
* @tparam T Type to create a reverse range on
*/
template <typename T>
class reverse_iterable
{
public:
/** Default constructor
*
* @param[in] it Value to reverse iterate on
*/
explicit reverse_iterable(T &it)
: _it(it)
{
}
/** Get beginning of iterator.
*
* @return beginning of iterator.
*/
typename T::reverse_iterator begin()
{
return _it.rbegin();
}
/** Get end of iterator.
*
* @return end of iterator.
*/
typename T::reverse_iterator end()
{
return _it.rend();
}
/** Get beginning of const iterator.
*
* @return beginning of const iterator.
*/
typename T::const_reverse_iterator cbegin()
{
return _it.rbegin();
}
/** Get end of const iterator.
*
* @return end of const iterator.
*/
typename T::const_reverse_iterator cend()
{
return _it.rend();
}
private:
T &_it;
};
/** Creates a reverse iterable for a given type
*
* @tparam T Type to create a reverse iterable on
*
* @param[in] val Iterable input
*
* @return Reverse iterable container
*/
template <typename T>
reverse_iterable<T> reverse_iterate(T &val)
{
return reverse_iterable<T>(val);
}
} // namespace iterable
} // namespace utils
} // namespace arm_compute
#endif /* ARM_COMPUTE_MISC_ITERABLE_H */
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