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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: na_fwd.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
// $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
// $Revision: 49267 $

#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