1 2 #ifndef BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED 3 #define BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED 4 5 // Copyright Aleksey Gurtovoy 2000-2004 6 // 7 // Distributed under the Boost Software License, Version 1.0. 8 // (See accompanying file LICENSE_1_0.txt or copy at 9 // http://www.boost.org/LICENSE_1_0.txt) 10 // 11 // See http://www.boost.org/libs/mpl for documentation. 12 13 // $Id$ 14 // $Date$ 15 // $Revision$ 16 17 #include <boost/mpl/front_fwd.hpp> 18 #include <boost/mpl/list/aux_/tag.hpp> 19 20 namespace boost { namespace mpl { 21 22 template<> 23 struct front_impl< aux::list_tag > 24 { 25 template< typename List > struct apply 26 { 27 typedef typename List::item type; 28 }; 29 }; 30 31 }} 32 33 #endif // BOOST_MPL_LIST_AUX_FRONT_HPP_INCLUDED 34