#ifndef BOOST_MPL_SET_AUX_AT_IMPL_HPP_INCLUDED #define BOOST_MPL_SET_AUX_AT_IMPL_HPP_INCLUDED // Copyright Aleksey Gurtovoy 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: at_impl.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ // $Revision: 49267 $ #include <boost/mpl/at_fwd.hpp> #include <boost/mpl/set/aux_/has_key_impl.hpp> #include <boost/mpl/set/aux_/tag.hpp> #include <boost/mpl/if.hpp> #include <boost/mpl/void.hpp> namespace boost { namespace mpl { template<> struct at_impl< aux::set_tag > { template< typename Set, typename T > struct apply { typedef typename if_< has_key_impl<aux::set_tag>::apply<Set,T> , T , void_ >::type type; }; }; }} #endif // BOOST_MPL_SET_AUX_AT_IMPL_HPP_INCLUDED