| // Copyright 2020 The Pigweed Authors |
| // |
| // 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 |
| // |
| // https://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. |
| #pragma once |
| |
| #include <iterator> |
| |
| // Define std::data and std::size. |
| #ifndef __cpp_lib_nonmember_container_access |
| |
| #include <cstddef> |
| |
| namespace std { |
| |
| template <typename C> |
| constexpr auto data(C& container) -> decltype(container.data()) { |
| return container.data(); |
| } |
| |
| template <typename C> |
| constexpr auto data(const C& container) -> decltype(container.data()) { |
| return container.data(); |
| } |
| |
| template <typename T, size_t kSize> |
| constexpr T* data(T (&array)[kSize]) noexcept { |
| return array; |
| } |
| |
| template <typename C> |
| constexpr auto size(const C& container) -> decltype(container.size()) { |
| return container.size(); |
| } |
| |
| template <typename T, size_t kSize> |
| constexpr size_t size(const T (&)[kSize]) noexcept { |
| return kSize; |
| } |
| |
| } // namespace std |
| |
| #endif // __cpp_lib_nonmember_container_access |