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Diffstat (limited to 'support/Iterable.h')
-rw-r--r-- | support/Iterable.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/support/Iterable.h b/support/Iterable.h new file mode 100644 index 0000000000..8d99e70196 --- /dev/null +++ b/support/Iterable.h @@ -0,0 +1,107 @@ +/* + * Copyright (c) 2018-2020 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 */ |