109 lines
2.7 KiB
C++
109 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018-2020 Arm Limited.
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef ARM_COMPUTE_MISC_ITERABLE_H
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#define ARM_COMPUTE_MISC_ITERABLE_H
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#include <iterator>
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namespace arm_compute
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{
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namespace utils
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{
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namespace iterable
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{
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/** Reverse range iterable class
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*
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* @tparam T Type to create a reverse range on
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*/
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template <typename T>
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class reverse_iterable
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{
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public:
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/** Default constructor
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*
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* @param[in] it Value to reverse iterate on
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*/
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explicit reverse_iterable(T &it)
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: _it(it)
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{
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}
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/** Get beginning of iterator.
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*
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* @return beginning of iterator.
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*/
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typename T::reverse_iterator begin()
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{
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return _it.rbegin();
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}
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/** Get end of iterator.
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*
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* @return end of iterator.
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*/
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typename T::reverse_iterator end()
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{
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return _it.rend();
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}
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/** Get beginning of const iterator.
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*
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* @return beginning of const iterator.
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*/
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typename T::const_reverse_iterator cbegin()
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{
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return _it.rbegin();
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}
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/** Get end of const iterator.
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*
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* @return end of const iterator.
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*/
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typename T::const_reverse_iterator cend()
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{
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return _it.rend();
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}
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private:
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T &_it;
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};
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/** Creates a reverse iterable for a given type
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*
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* @tparam T Type to create a reverse iterable on
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*
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* @param[in] val Iterable input
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*
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* @return Reverse iterable container
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*/
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template <typename T>
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reverse_iterable<T> reverse_iterate(T &val)
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{
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return reverse_iterable<T>(val);
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}
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} // namespace iterable
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} // namespace utils
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} // namespace arm_compute
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#endif /* ARM_COMPUTE_MISC_ITERABLE_H */
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