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#ifndef BOOST_MPL_AUX_NA_FWD_HPP_INCLUDED

#define BOOST_MPL_AUX_NA_FWD_HPP_INCLUDED


// Copyright Aleksey Gurtovoy 2001-2004

//

// 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.


// $Id$

// $Date$

// $Revision$


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


BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN

// n.a. == not available

struct na
{
    typedef na type;
    enum { value = 0 };
};

BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
BOOST_MPL_AUX_ADL_BARRIER_DECL(na)

#endif // BOOST_MPL_AUX_NA_FWD_HPP_INCLUDED