pjs/xpcom/glue/unused.h

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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at:
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
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 * for the specific language governing rights and limitations under the
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 * The Original Code is Mozilla Code.
 *
 * The Initial Developer of the Original Code is
 *   The Mozilla Foundation
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Chris Jones <jones.chris.g@gmail.com>
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * ***** END LICENSE BLOCK ***** */

#ifndef mozilla_unused_h
#define mozilla_unused_h

#include "nscore.h"

namespace mozilla {

//
// Suppress GCC warnings about unused return values with
//   unused << SomeFuncDeclaredWarnUnusedReturnValue();
//
struct NS_COM_GLUE unused_t { };

extern const unused_t NS_COM_GLUE unused;

template<typename T>
inline void operator<<(const unused_t& /*unused*/, const T& /*unused*/) { }

}

#endif // mozilla_unused_h