| #ifndef BOOST_MPL_AUX_BACK_IMPL_HPP_INCLUDED | |
| #define BOOST_MPL_AUX_BACK_IMPL_HPP_INCLUDED | |
| // Copyright Aleksey Gurtovoy 2000-2004 | |
| // | |
| // 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: back_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/begin_end.hpp> | |
| #include <boost/mpl/next_prior.hpp> | |
| #include <boost/mpl/deref.hpp> | |
| #include <boost/mpl/aux_/traits_lambda_spec.hpp> | |
| namespace boost { namespace mpl { | |
| // default implementation, requires at least bi-directional iterators; | |
| // conrete sequences might override it by specializing either the | |
| // 'back_impl' or the primary 'back' template | |
| template< typename Tag > | |
| struct back_impl | |
| { | |
| template< typename Sequence > struct apply | |
| { | |
| typedef typename end<Sequence>::type end_; | |
| typedef typename prior<end_>::type last_; | |
| typedef typename deref<last_>::type type; | |
| }; | |
| }; | |
| BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(1, back_impl) | |
| }} | |
| #endif // BOOST_MPL_AUX_BACK_IMPL_HPP_INCLUDED |