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#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.
// $Id$
// $Date$
// $Revision$
#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
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