| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef ACCESSIBILITY_BASE_COMPILER_SPECIFIC_H_ |
| #define ACCESSIBILITY_BASE_COMPILER_SPECIFIC_H_ |
| |
| #if !defined(__GNUC__) && !defined(__clang__) && !defined(_MSC_VER) |
| #error Unsupported compiler. |
| #endif |
| |
| // Annotate a variable indicating it's ok if the variable is not used. |
| // (Typically used to silence a compiler warning when the assignment |
| // is important for some other reason.) |
| // Use like: |
| // int x = ...; |
| // BASE_ALLOW_UNUSED_LOCAL(x); |
| #define BASE_ALLOW_UNUSED_LOCAL(x) false ? (void)x : (void)0 |
| |
| // Annotate a typedef or function indicating it's ok if it's not used. |
| // Use like: |
| // typedef Foo Bar ALLOW_UNUSED_TYPE; |
| #if defined(__GNUC__) || defined(__clang__) |
| #define BASE_ALLOW_UNUSED_TYPE __attribute__((unused)) |
| #else |
| #define BASE_ALLOW_UNUSED_TYPE |
| #endif |
| |
| #endif // ACCESSIBILITY_BASE_COMPILER_SPECIFIC_H_ |
