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/* -*- 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/Attributes.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>
MOZ_ALWAYS_INLINE_EVEN_DEBUG 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
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