| // Copyright 2024 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 |
| |
| // Provide static_assert as a macro before C23. |
| #if !defined(__cplusplus) && __STDC_VERSION__ < 202311L |
| |
| #undef static_assert // Undefine the macro in case <assert.h> is included. |
| |
| // Define static_assert to support an optional message argument, as in C23. |
| #define static_assert(expression, ...) \ |
| _Static_assert(expression, "(" #expression ") " __VA_ARGS__) |
| |
| // _Static_assert was not added until C11, but modern compilers support it for |
| // all C standards. GCC has supported it since 4.6, for example. |
| |
| #endif // !defined(__cplusplus) && __STDC_VERSION__ < 202311L |
