mpl/aux_/na_fwd.hpp

0001
0002 #ifndef BOOST_MPL_AUX_NA_FWD_HPP_INCLUDED
0003 #define BOOST_MPL_AUX_NA_FWD_HPP_INCLUDED
0004
0005 // Copyright Aleksey Gurtovoy 2001-2004
0006 //
0007 // Distributed under the Boost Software License, Version 1.0.
0008 // (See accompanying file LICENSE_1_0.txt or copy at
0009 // http://www.boost.org/LICENSE_1_0.txt)
0010 //
0011 // See http://www.boost.org/libs/mpl for documentation.
0012
0013 // $Id$
0014 // $Date$
0015 // $Revision$
0016
0017 #include <boost/mpl/aux_/adl_barrier.hpp>
0018
0019 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN
0020
0021 // n.a. == not available
0022 struct na
0023 {
0024     typedef na type;
0025     enum { value = 0 };
0026 };
0027
0028 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
0029 BOOST_MPL_AUX_ADL_BARRIER_DECL(na)
0030
0031 #endif // BOOST_MPL_AUX_NA_FWD_HPP_INCLUDED