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66 lines
1.5 KiB
66 lines
1.5 KiB
3 years ago
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#ifndef BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
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#define BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
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// Copyright Aleksey Gurtovoy 2000-2010
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// Copyright David Abrahams 2000-2002
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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/transform.hpp>
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#include <boost/mpl/begin_end.hpp>
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#include <boost/mpl/iterator_tags.hpp>
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#include <boost/mpl/next.hpp>
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#include <boost/mpl/lambda.hpp>
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#include <boost/mpl/deref.hpp>
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#include <boost/mpl/aux_/na_spec.hpp>
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namespace boost { namespace mpl {
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template< typename IteratorSeq >
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struct zip_iterator
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{
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typedef forward_iterator_tag category;
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typedef typename transform1<
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IteratorSeq
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, deref<_1>
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>::type type;
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typedef zip_iterator<
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typename transform1<
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IteratorSeq
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, mpl::next<_1>
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>::type
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> next;
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};
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template<
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typename BOOST_MPL_AUX_NA_PARAM(Sequences)
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>
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struct zip_view
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{
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private:
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typedef typename transform1< Sequences, mpl::begin<_1> >::type first_ones_;
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typedef typename transform1< Sequences, mpl::end<_1> >::type last_ones_;
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public:
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typedef nested_begin_end_tag tag;
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typedef zip_view type;
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typedef zip_iterator<first_ones_> begin;
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typedef zip_iterator<last_ones_> end;
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};
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BOOST_MPL_AUX_NA_SPEC(1, zip_view)
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}}
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#endif // BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
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