mfbt/unused.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_unused_h
   8 #define mozilla_unused_h
   9
  10 #include "mozilla/Types.h"
  11
  12 namespace mozilla {
  13
  14 //
  15 // Suppress GCC warnings about unused return values with
  16 //   unused << SomeFuncDeclaredWarnUnusedReturnValue();
  17 //
  18 struct unused_t
  19 {
  20 };
  21
  22 extern MFBT_DATA const unused_t unused;
  23
  24 template<typename T>
  25 inline void
  26 operator<<(const unused_t& /*unused*/, const T& /*unused*/)
  27 {
  28 }
  29
  30 }
  31
  32 #endif // mozilla_unused_h