| // 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. |
| |
| // Macros for adapting to older versions of C++. A few keywords (consteval, |
| // constinit) are handled by pw_polfyill/language_features.h, which is directly |
| // -included by users of pw_polyfill. |
| #pragma once |
| |
| #ifdef __cpp_inline_variables |
| #define PW_INLINE_VARIABLE inline |
| #else |
| #define PW_INLINE_VARIABLE |
| #endif // __cpp_inline_variables |
| |
| // Mark functions as constexpr if the relaxed constexpr rules are supported. |
| #if __cpp_constexpr >= 201304L |
| #define PW_CONSTEXPR_FUNCTION constexpr |
| #else |
| #define PW_CONSTEXPR_FUNCTION |
| #endif // __cpp_constexpr >= 201304L |
