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// <utility> -*- C++ -*-

// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this library; see the file COPYING.  If not, write to
// the Free Software Foundation, 51 Franklin Street, Fifth Floor,
// Boston, MA 02110-1301, USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

/*
 *
 * Copyright (c) 1994
 * Hewlett-Packard Company
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Hewlett-Packard Company makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 *
 * Copyright (c) 1996,1997
 * Silicon Graphics Computer Systems, Inc.
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Silicon Graphics makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 */

/** @file include/utility
 *  This is a Standard C++ Library header. 
 */

#ifndef _GLIBCXX_UTILITY
#define _GLIBCXX_UTILITY 1

#pragma GCC system_header

#include <bits/c++config.h>
#include <bits/stl_relops.h>
#include <bits/stl_pair.h>

#ifdef __GXX_EXPERIMENTAL_CXX0X__
#  if defined(_GLIBCXX_INCLUDE_AS_TR1)
#    error C++0x header cannot be included from TR1 header
#  endif
#  if defined(_GLIBCXX_INCLUDE_AS_CXX0X)
#    include <tr1_impl/utility>
#  else
#    define _GLIBCXX_INCLUDE_AS_CXX0X
#    define _GLIBCXX_BEGIN_NAMESPACE_TR1
#    define _GLIBCXX_END_NAMESPACE_TR1
#    define _GLIBCXX_TR1
#    include <tr1_impl/utility>
#    undef _GLIBCXX_TR1
#    undef _GLIBCXX_END_NAMESPACE_TR1
#    undef _GLIBCXX_BEGIN_NAMESPACE_TR1
#    undef _GLIBCXX_INCLUDE_AS_CXX0X
#  endif

#include <type_traits>

namespace std
{
  // 20.2.2, forward/move
  template<typename _Tp>
    struct identity
    {
      typedef _Tp type;
    };

  template<typename _Tp>
    inline _Tp&&
    forward(typename std::identity<_Tp>::type&& __t)
    { return __t; }

  template<typename _Tp>
    inline typename std::remove_reference<_Tp>::type&&
    move(_Tp&& __t)
    { return __t; }
}

#endif

#endif /* _GLIBCXX_UTILITY */