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Diffstat (limited to 'runtime/libs/ndarray/src/detail/cxx14.h')
-rw-r--r-- | runtime/libs/ndarray/src/detail/cxx14.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/runtime/libs/ndarray/src/detail/cxx14.h b/runtime/libs/ndarray/src/detail/cxx14.h new file mode 100644 index 000000000..8b78fb985 --- /dev/null +++ b/runtime/libs/ndarray/src/detail/cxx14.h @@ -0,0 +1,67 @@ +/* + * Copyright (c) 2019 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 _NDARRAY_CXX14_H_ +#define _NDARRAY_CXX14_H_ + +namespace ndarray +{ + +namespace cxx14 +{ + +template <size_t... Nums> struct index_sequence +{ + using value_type = size_t; + + static constexpr std::size_t size() noexcept { return sizeof...(Nums); } +}; + +namespace detail +{ + +template <size_t v, typename Seq> struct _append; + +template <size_t v, size_t... Nums> struct _append<v, index_sequence<Nums...>> +{ + using result = index_sequence<Nums..., v>; +}; + +template <size_t Len> struct make_index_sequence +{ + using result = + typename detail::_append<Len - 1, typename make_index_sequence<Len - 1>::result>::result; +}; + +template <> struct make_index_sequence<1> +{ + using result = index_sequence<0>; +}; + +template <> struct make_index_sequence<0> +{ + using result = index_sequence<>; +}; + +} // namespace detail + +template <size_t Num> using make_index_sequence = typename detail::make_index_sequence<Num>::result; + +} // namespace cxx14 + +} // namespace ndarray + +#endif //_NDARRAY_CXX14_H_ |