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44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
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#ifndef BOOST_MPL_AUX_BACK_IMPL_HPP_INCLUDED
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#define BOOST_MPL_AUX_BACK_IMPL_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2000-2004
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/mpl for documentation.
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// $Id$
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// $Date$
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// $Revision$
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#include <boost/mpl/begin_end.hpp>
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#include <boost/mpl/next_prior.hpp>
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#include <boost/mpl/deref.hpp>
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#include <boost/mpl/aux_/traits_lambda_spec.hpp>
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namespace boost { namespace mpl {
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// default implementation, requires at least bi-directional iterators;
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// conrete sequences might override it by specializing either the
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// 'back_impl' or the primary 'back' template
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template< typename Tag >
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struct back_impl
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{
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template< typename Sequence > struct apply
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{
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typedef typename end<Sequence>::type end_;
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typedef typename prior<end_>::type last_;
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typedef typename deref<last_>::type type;
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};
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};
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BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(1, back_impl)
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}}
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#endif // BOOST_MPL_AUX_BACK_IMPL_HPP_INCLUDED
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