yes_no.hpp

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#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.
 
// $Id: yes_no.hpp 13472 2017-08-22 07:53:44Z richean $
// $Date: 2017-08-22 09:53:44 +0200 (Di, 22 Aug 2017) $
// $Revision: 13472 $
 
#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