1
2#ifndef BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
3#define BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
4
5// Copyright Aleksey Gurtovoy 2000-2010
6// Copyright David Abrahams 2000-2002
7//
8// Distributed under the Boost Software License, Version 1.0.
9// (See accompanying file LICENSE_1_0.txt or copy at
10// http://www.boost.org/LICENSE_1_0.txt)
11//
12// See http://www.boost.org/libs/mpl for documentation.
13
14// $Id$
15// $Date$
16// $Revision$
17
18#include <boost/mpl/transform.hpp>
19#include <boost/mpl/begin_end.hpp>
20#include <boost/mpl/iterator_tags.hpp>
21#include <boost/mpl/next.hpp>
22#include <boost/mpl/lambda.hpp>
23#include <boost/mpl/deref.hpp>
24#include <boost/mpl/aux_/na_spec.hpp>
25
26namespace boost { namespace mpl {
27
28template< typename IteratorSeq >
29struct zip_iterator
30{
31 typedef forward_iterator_tag category;
32 typedef typename transform1<
33 IteratorSeq
34 , deref<_1>
35 >::type type;
36
37 typedef zip_iterator<
38 typename transform1<
39 IteratorSeq
40 , mpl::next<_1>
41 >::type
42 > next;
43};
44
45template<
46 typename BOOST_MPL_AUX_NA_PARAM(Sequences)
47 >
48struct zip_view
49{
50 private:
51 typedef typename transform1< Sequences, mpl::begin<_1> >::type first_ones_;
52 typedef typename transform1< Sequences, mpl::end<_1> >::type last_ones_;
53
54 public:
55 typedef nested_begin_end_tag tag;
56 typedef zip_view type;
57 typedef zip_iterator<first_ones_> begin;
58 typedef zip_iterator<last_ones_> end;
59};
60
61BOOST_MPL_AUX_NA_SPEC(1, zip_view)
62
63}}
64
65#endif // BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
66

source code of boost/boost/mpl/zip_view.hpp