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#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.
// $Source: /cvsroot/boost/boost/boost/mpl/aux_/back_impl.hpp,v $
// $Date: 2004/09/02 15:40:43 $
// $Revision: 1.6 $
#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