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Diffstat (limited to 'arm_compute/core/utils/misc/utility.h')
-rw-r--r-- | arm_compute/core/utils/misc/utility.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arm_compute/core/utils/misc/utility.h b/arm_compute/core/utils/misc/utility.h new file mode 100644 index 0000000000..898d0cdea8 --- /dev/null +++ b/arm_compute/core/utils/misc/utility.h @@ -0,0 +1,72 @@ +/* + * Copyright (c) 2017 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_UTILITY_H__ +#define __ARM_COMPUTE_MISC_UTILITY_H__ + +#include <array> + +namespace arm_compute +{ +namespace utility +{ +/** @cond */ +template <std::size_t...> +struct index_sequence +{ +}; + +template <std::size_t N, std::size_t... S> +struct index_sequence_generator : index_sequence_generator < N - 1, N - 1, S... > +{ +}; + +template <std::size_t... S> +struct index_sequence_generator<0u, S...> : index_sequence<S...> +{ + using type = index_sequence<S...>; +}; + +template <std::size_t N> +using index_sequence_t = typename index_sequence_generator<N>::type; +/** @endcond */ + +namespace detail +{ +template <std::size_t... S, + typename Iterator, + typename T = std::array<typename std::iterator_traits<Iterator>::value_type, sizeof...(S)>> +T make_array(Iterator first, index_sequence<S...>) +{ + return T{ { first[S]... } }; +} +} // namespace detail + +template <std::size_t N, typename Iterator> +std::array<typename std::iterator_traits<Iterator>::value_type, N> make_array(Iterator first, Iterator last) +{ + return detail::make_array(first, index_sequence_t<N> {}); +} +} // namespace misc +} // namespace arm_compute +#endif /* __ARM_COMPUTE_MISC_UTILITY_H__ */ |