| // 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 |
| |
| #if __has_include(<version>) |
| #include <version> |
| #endif // __has_include(<version>) |
| |
| // We are using <span> only if we were able to fetch __cpp_lib_span from |
| // <version> and it is at least 202002. In all other cases we are using |
| // custom span implementation. |
| #if defined(__cpp_lib_span) && __cpp_lib_span >= 202002L |
| #include_next <span> |
| #else |
| #undef __cpp_lib_span |
| #include "pw_span/internal/span_polyfill.h" |
| #endif // defined(__cpp_lib_span) && __cpp_lib_span >= 202002L |
