Chris@16: 
Chris@16: #ifndef BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
Chris@16: #define BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
Chris@16: 
Chris@16: // Copyright Aleksey Gurtovoy 2000-2010
Chris@16: // Copyright David Abrahams 2000-2002
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0.
Chris@16: // (See accompanying file LICENSE_1_0.txt or copy at 
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: // See http://www.boost.org/libs/mpl for documentation.
Chris@16: 
Chris@101: // $Id$
Chris@101: // $Date$
Chris@101: // $Revision$
Chris@16: 
Chris@16: #include <boost/mpl/transform.hpp>
Chris@16: #include <boost/mpl/begin_end.hpp>
Chris@16: #include <boost/mpl/iterator_tags.hpp>
Chris@16: #include <boost/mpl/next.hpp>
Chris@16: #include <boost/mpl/lambda.hpp>
Chris@16: #include <boost/mpl/deref.hpp>
Chris@16: #include <boost/mpl/aux_/na_spec.hpp>
Chris@16: 
Chris@16: namespace boost { namespace mpl {
Chris@16: 
Chris@16: template< typename IteratorSeq >
Chris@16: struct zip_iterator
Chris@16: {
Chris@16:     typedef forward_iterator_tag category;
Chris@16:     typedef typename transform1<
Chris@16:           IteratorSeq
Chris@16:         , deref<_1>
Chris@16:         >::type type;
Chris@16: 
Chris@16:     typedef zip_iterator<
Chris@16:           typename transform1<
Chris@16:                 IteratorSeq
Chris@16:               , mpl::next<_1>
Chris@16:             >::type
Chris@16:         > next;
Chris@16: };
Chris@16: 
Chris@16: template<
Chris@16:       typename BOOST_MPL_AUX_NA_PARAM(Sequences)
Chris@16:     >
Chris@16: struct zip_view
Chris@16: {
Chris@16:  private:
Chris@16:     typedef typename transform1< Sequences, mpl::begin<_1> >::type first_ones_;
Chris@16:     typedef typename transform1< Sequences, mpl::end<_1> >::type last_ones_;
Chris@16:     
Chris@16:  public:
Chris@16:     typedef nested_begin_end_tag tag;
Chris@16:     typedef zip_view type;
Chris@16:     typedef zip_iterator<first_ones_> begin;
Chris@16:     typedef zip_iterator<last_ones_> end;
Chris@16: };
Chris@16: 
Chris@16: BOOST_MPL_AUX_NA_SPEC(1, zip_view)
Chris@16: 
Chris@16: }}
Chris@16: 
Chris@16: #endif // BOOST_MPL_ZIP_VIEW_HPP_INCLUDED