1/*=============================================================================
2 Copyright (c) 2001-2011 Joel de Guzman
3
4 Distributed under the Boost Software License, Version 1.0. (See accompanying
5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6==============================================================================*/
7#if !defined(FUSION_NEXT_05042005_1101)
8#define FUSION_NEXT_05042005_1101
9
10#include <boost/fusion/support/config.hpp>
11#include <boost/fusion/support/tag_of.hpp>
12
13namespace boost { namespace fusion
14{
15 // Special tags:
16 struct iterator_facade_tag; // iterator facade tag
17 struct boost_array_iterator_tag; // boost::array iterator tag
18 struct mpl_iterator_tag; // mpl sequence iterator tag
19 struct std_pair_iterator_tag; // std::pair iterator tag
20
21 namespace extension
22 {
23 template <typename Tag>
24 struct next_impl
25 {
26 template <typename Iterator>
27 struct apply {};
28 };
29
30 template <>
31 struct next_impl<iterator_facade_tag>
32 {
33 template <typename Iterator>
34 struct apply : Iterator::template next<Iterator> {};
35 };
36
37 template <>
38 struct next_impl<boost_array_iterator_tag>;
39
40 template <>
41 struct next_impl<mpl_iterator_tag>;
42
43 template <>
44 struct next_impl<std_pair_iterator_tag>;
45 }
46
47 namespace result_of
48 {
49 template <typename Iterator>
50 struct next
51 : extension::next_impl<typename detail::tag_of<Iterator>::type>::
52 template apply<Iterator>
53 {};
54 }
55
56 template <typename Iterator>
57 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
58 inline typename result_of::next<Iterator>::type const
59 next(Iterator const& i)
60 {
61 return result_of::next<Iterator>::call(i);
62 }
63}}
64
65#endif
66

source code of include/boost/fusion/iterator/next.hpp