set/aux_/has_key_impl.hpp

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#ifndef BOOST_MPL_SET_AUX_HAS_KEY_IMPL_HPP_INCLUDED
#define BOOST_MPL_SET_AUX_HAS_KEY_IMPL_HPP_INCLUDED
 
// Copyright Aleksey Gurtovoy 2003-2004
// Copyright David Abrahams 2003-2004
//
// 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: has_key_impl.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/set/aux_/tag.hpp>
#include <boost/mpl/has_key_fwd.hpp>
#include <boost/mpl/bool.hpp>
#include <boost/mpl/aux_/overload_names.hpp>
#include <boost/mpl/aux_/static_cast.hpp>
#include <boost/mpl/aux_/yes_no.hpp>
#include <boost/mpl/aux_/type_wrapper.hpp>
#include <boost/mpl/aux_/config/workaround.hpp>
#include <boost/mpl/aux_/config/static_constant.hpp>
 
namespace boost { namespace mpl {
 
template<>
struct has_key_impl< aux::set_tag >
{
    template< typename Set, typename T > struct apply
#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \
    || BOOST_WORKAROUND(__EDG_VERSION__, <= 245)
    {
        BOOST_STATIC_CONSTANT(bool, value = 
              ( sizeof( BOOST_MPL_AUX_OVERLOAD_CALL_IS_MASKED(
                    Set
                  , BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<T>*, 0)
                  ) ) == sizeof(aux::no_tag) )
            );
 
        typedef bool_<value> type;
 
#else // ISO98 C++
        : bool_< 
              ( sizeof( BOOST_MPL_AUX_OVERLOAD_CALL_IS_MASKED(
                    Set
                  , BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<T>*, 0)
                  ) ) == sizeof(aux::no_tag) )
            >
    {
#endif
    };
};
 
}}
 
#endif // BOOST_MPL_SET_AUX_HAS_KEY_IMPL_HPP_INCLUDED