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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_NEXT_IMPL_07162005_1029) | |
8 | #define FUSION_NEXT_IMPL_07162005_1029 | |
9 | ||
10 | #include <boost/fusion/support/config.hpp> | |
11 | #include <boost/fusion/iterator/next.hpp> | |
12 | ||
13 | namespace boost { namespace fusion | |
14 | { | |
15 | struct transform_view_iterator_tag; | |
16 | struct transform_view_iterator2_tag; | |
17 | ||
18 | template<typename First, typename F> | |
19 | struct transform_view_iterator; | |
20 | ||
21 | template <typename First1, typename First2, typename F> | |
22 | struct transform_view_iterator2; | |
23 | ||
24 | namespace extension | |
25 | { | |
26 | template <typename Tag> | |
27 | struct next_impl; | |
28 | ||
29 | // Unary Version | |
30 | template <> | |
31 | struct next_impl<transform_view_iterator_tag> | |
32 | { | |
33 | template <typename Iterator> | |
34 | struct apply | |
35 | { | |
36 | typedef typename Iterator::first_type first_type; | |
37 | typedef typename result_of::next<first_type>::type next_type; | |
38 | typedef typename Iterator::transform_type transform_type; | |
39 | typedef transform_view_iterator<next_type, transform_type> type; | |
40 | ||
41 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
42 | static type | |
43 | call(Iterator const& i) | |
44 | { | |
45 | return type(fusion::next(i.first), i.f); | |
46 | } | |
47 | }; | |
48 | }; | |
49 | ||
50 | // Binary Version | |
51 | template <> | |
52 | struct next_impl<transform_view_iterator2_tag> | |
53 | { | |
54 | template <typename Iterator> | |
55 | struct apply | |
56 | { | |
57 | typedef typename Iterator::first1_type first1_type; | |
58 | typedef typename Iterator::first2_type first2_type; | |
59 | typedef typename result_of::next<first1_type>::type next1_type; | |
60 | typedef typename result_of::next<first2_type>::type next2_type; | |
61 | typedef typename Iterator::transform_type transform_type; | |
62 | typedef transform_view_iterator2<next1_type, next2_type, transform_type> type; | |
63 | ||
64 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
65 | static type | |
66 | call(Iterator const& i) | |
67 | { | |
68 | return type(fusion::next(i.first1), fusion::next(i.first2), i.f); | |
69 | } | |
70 | }; | |
71 | }; | |
72 | } | |
73 | }} | |
74 | ||
75 | #endif | |
76 | ||
77 |