#ifndef BOOST_MPL_AUX_YES_NO_HPP_INCLUDED

 #define BOOST_MPL_AUX_YES_NO_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/aux_/yes_no.hpp,v $

 // $Date: 2005/08/25 16:27:21 $

 // $Revision: 1.8 $

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

 #include <boost/mpl/aux_/config/arrays.hpp>

 #include <boost/mpl/aux_/config/msvc.hpp>

 #include <boost/mpl/aux_/config/workaround.hpp>

 namespace boost { namespace mpl { namespace aux {

 typedef char (&no_tag)[1];

 typedef char (&yes_tag)[2];

 template< bool C_ > struct yes_no_tag

 {

     typedef no_tag type;

 };

 template<> struct yes_no_tag<true>

 {

     typedef yes_tag type;

 };

 template< BOOST_MPL_AUX_NTTP_DECL(long, n) > struct weighted_tag

 {

 #if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)

     typedef char (&type)[n];

 #else

     char buf[n];

     typedef weighted_tag type;

 #endif

 };

 #if defined(BOOST_MPL_CFG_NO_DEPENDENT_ARRAY_TYPES)

 template<> struct weighted_tag<0>

 {

     typedef char (&type)[1];

 };

 #endif

 }}}

 #endif // BOOST_MPL_AUX_YES_NO_HPP_INCLUDED