From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- mfbt/Unused.h | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 mfbt/Unused.h (limited to 'mfbt/Unused.h') diff --git a/mfbt/Unused.h b/mfbt/Unused.h new file mode 100644 index 0000000000..6c4ed4baac --- /dev/null +++ b/mfbt/Unused.h @@ -0,0 +1,41 @@ +/* -*- 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 + 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 -- cgit v1.2.3