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