| /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
| /* This Source Code Form is subject to the terms of the Mozilla Public |
| * License, v. 2.0. If a copy of the MPL was not distributed with this |
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| |
| #ifndef mozilla_unused_h |
| #define mozilla_unused_h |
| |
| #include "mozilla/Types.h" |
| |
| #ifdef __cplusplus |
| |
| namespace mozilla { |
| |
| // |
| // Suppress GCC warnings about unused return values with |
| // Unused << SomeFuncDeclaredWarnUnusedReturnValue(); |
| // |
| struct unused_t |
| { |
| template<typename T> |
| inline void |
| operator<<(const T& /*unused*/) const {} |
| }; |
| |
| extern MFBT_DATA const unused_t Unused; |
| |
| } // namespace mozilla |
| |
| #endif // __cplusplus |
| |
| // An alternative to mozilla::Unused for use in (a) C code and (b) code where |
| // linking with unused.o is difficult. |
| #define MOZ_UNUSED(expr) \ |
| do { if (expr) { (void)0; } } while (0) |
| |
| #endif // mozilla_unused_h |
