1 
2 #ifndef BOOST_MPL_AUX_NA_FWD_HPP_INCLUDED
3 #define BOOST_MPL_AUX_NA_FWD_HPP_INCLUDED
4 
5 // Copyright Aleksey Gurtovoy 2001-2004
6 //
7 // Distributed under the Boost Software License, Version 1.0.
8 // (See accompanying file LICENSE_1_0.txt or copy at
9 // http://www.boost.org/LICENSE_1_0.txt)
10 //
11 // See http://www.boost.org/libs/mpl for documentation.
12 
13 // $Id: na_fwd.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
14 // $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
15 // $Revision: 49267 $
16 
17 #include <boost/mpl/aux_/adl_barrier.hpp>
18 
19 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN
20 
21 // n.a. == not available
22 struct na
23 {
24     typedef na type;
25     enum { value = 0 };
26 };
27 
28 BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE
29 BOOST_MPL_AUX_ADL_BARRIER_DECL(na)
30 
31 #endif // BOOST_MPL_AUX_NA_FWD_HPP_INCLUDED
32