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#ifndef BOOST_MPL_JOINT_VIEW_HPP_INCLUDED
#define BOOST_MPL_JOINT_VIEW_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.

// $Source$
// $Date: 2004-10-02 15:08:57 -0400 (Sat, 02 Oct 2004) $
// $Revision: 25528 $

#include <boost/mpl/aux_/joint_iter.hpp>
#include <boost/mpl/plus.hpp>
#include <boost/mpl/size_fwd.hpp>
#include <boost/mpl/begin_end.hpp>
#include <boost/mpl/aux_/na_spec.hpp>

namespace boost { namespace mpl {

namespace aux {
struct joint_view_tag;
}

template<>
struct size_impl< aux::joint_view_tag >
{
    template < typename JointView > struct apply
      : plus<
            size<typename JointView::sequence1_>
          , size<typename JointView::sequence2_>
          >
    {};
};

template<
      typename BOOST_MPL_AUX_NA_PARAM(Sequence1_)
    , typename BOOST_MPL_AUX_NA_PARAM(Sequence2_)
    >
struct joint_view
{
    typedef typename mpl::begin<Sequence1_>::type   first1_;
    typedef typename mpl::end<Sequence1_>::type     last1_;
    typedef typename mpl::begin<Sequence2_>::type   first2_;
    typedef typename mpl::end<Sequence2_>::type     last2_;

    // agurt, 25/may/03: for the 'size_traits' implementation above
    typedef Sequence1_ sequence1_;
    typedef Sequence2_ sequence2_;

    typedef joint_view type;
    typedef aux::joint_view_tag tag;
    typedef joint_iter<first1_,last1_,first2_>  begin;
    typedef joint_iter<last1_,last1_,last2_>    end;
};

BOOST_MPL_AUX_NA_SPEC(2, joint_view)

}}

#endif // BOOST_MPL_JOINT_VIEW_HPP_INCLUDED

joint_view.hpp

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