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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_PRIOR_IMPL_07202005_0857) | |
8 | #define FUSION_PRIOR_IMPL_07202005_0857 | |
9 | ||
10 | #include <boost/fusion/support/config.hpp> | |
11 | #include <boost/fusion/iterator/next.hpp> | |
12 | #include <boost/fusion/iterator/prior.hpp> | |
13 | ||
14 | namespace boost { namespace fusion | |
15 | { | |
16 | struct reverse_view_iterator_tag; | |
17 | ||
18 | template <typename Iterator> | |
19 | struct reverse_view_iterator; | |
20 | ||
21 | namespace extension | |
22 | { | |
23 | template <> | |
24 | struct prior_impl<reverse_view_iterator_tag> | |
25 | { | |
26 | template <typename Iterator> | |
27 | struct apply | |
28 | { | |
29 | typedef typename Iterator::first_type first_type; | |
30 | typedef typename next_impl<typename first_type::fusion_tag>:: | |
31 | template apply<first_type> | |
32 | wrapped; | |
33 | ||
34 | typedef reverse_view_iterator<typename wrapped::type> type; | |
35 | ||
36 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
37 | static type | |
38 | call(Iterator const& i) | |
39 | { | |
40 | return type(wrapped::call(i.first)); | |
41 | } | |
42 | }; | |
43 | }; | |
44 | } | |
45 | }} | |
46 | ||
47 | #endif | |
48 | ||
49 |