#ifndef BOOST_MPL_IDENTITY_HPP_INCLUDED

#define BOOST_MPL_IDENTITY_HPP_INCLUDED

// Copyright Aleksey Gurtovoy 2000-2004

//

// Distributed under the Boost Software License, Version 1.0. 

// (See accompanying file LICENSE_1_0.txt or copy at 

// http://www.boost.org/LICENSE_1_0.txt)

//

// See http://www.boost.org/libs/mpl for documentation.

// $Source: /cvsroot/boost/boost/boost/mpl/identity.hpp,v $

// $Date: 2004/09/02 15:40:41 $

// $Revision: 1.4 $

#include <boost/mpl/aux_/na_spec.hpp>

#include <boost/mpl/aux_/lambda_support.hpp>

namespace boost { namespace mpl {

template<

      typename BOOST_MPL_AUX_NA_PARAM(T)

    >

struct identity

{

    typedef T type;

    BOOST_MPL_AUX_LAMBDA_SUPPORT(1, identity, (T))

};

template<

      typename BOOST_MPL_AUX_NA_PARAM(T)

    >

struct make_identity

{

    typedef identity<T> type;

    BOOST_MPL_AUX_LAMBDA_SUPPORT(1, make_identity, (T))

};

BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, identity)

BOOST_MPL_AUX_NA_SPEC_NO_ETI(1, make_identity)

}}

#endif // BOOST_MPL_IDENTITY_HPP_INCLUDED