| // Copyright 2023 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_MACROS_IF_H_ |
| #define BASE_MACROS_IF_H_ |
| |
| #include "base/macros/concat.h" |
| |
| // Given a `_Cond` that evaluates to exactly 0/false or 1/true, this macro |
| // evaluates to either the `_Then` or `_Else` args. Unlike a real conditional |
| // expression, this does not support conditions other than `0`, `1`, `true` or |
| // `false`. |
| #define BASE_IF(_Cond, _Then, _Else) \ |
| BASE_CONCAT(BASE_INTERNAL_IF_, _Cond)(_Then, _Else) |
| |
| // Implementation details: do not use directly. |
| #define BASE_INTERNAL_IF_1(_Then, _Else) _Then |
| #define BASE_INTERNAL_IF_0(_Then, _Else) _Else |
| #define BASE_INTERNAL_IF_true(_Then, _Else) _Then |
| #define BASE_INTERNAL_IF_false(_Then, _Else) _Else |
| |
| #endif // BASE_MACROS_IF_H_ |
