#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.

 // $Source: /cvsroot/boost/boost/boost/mpl/set/aux_/has_key_impl.hpp,v $

 // $Date: 2004/10/13 18:23:37 $

 // $Revision: 1.7 $

 #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