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1 | /*============================================================================= |
2 | Copyright (c) 2001-2011 Joel de Guzman | |
3 | Copyright (c) 2005-2006 Dan Marsden | |
4 | ||
5 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
6 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
7 | ==============================================================================*/ | |
8 | #if !defined(FUSION_DISTANCE_IMPL_13122005_2139) | |
9 | #define FUSION_DISTANCE_IMPL_13122005_2139 | |
10 | ||
11 | #include <boost/fusion/support/config.hpp> | |
12 | #include <boost/fusion/iterator/distance.hpp> | |
13 | ||
14 | namespace boost { namespace fusion { | |
15 | ||
16 | struct transform_view_iterator_tag; | |
17 | struct transform_view_iterator2_tag; | |
18 | ||
19 | namespace extension | |
20 | { | |
21 | template<typename Tag> | |
22 | struct distance_impl; | |
23 | ||
24 | // Unary Version | |
25 | template<> | |
26 | struct distance_impl<transform_view_iterator_tag> | |
27 | { | |
28 | template<typename First, typename Last> | |
29 | struct apply | |
30 | : result_of::distance<typename First::first_type, typename Last::first_type> | |
31 | { | |
32 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
33 | static | |
34 | typename result_of::distance<typename First::first_type, typename Last::first_type>::type | |
35 | call(First const& first, Last const& last) | |
36 | { | |
37 | return boost::fusion::distance(first.first, last.first); | |
38 | } | |
39 | }; | |
40 | }; | |
41 | ||
42 | // Binary Version | |
43 | template<> | |
44 | struct distance_impl<transform_view_iterator2_tag> | |
45 | { | |
46 | template<typename First, typename Last> | |
47 | struct apply | |
48 | : result_of::distance<typename First::first1_type, typename Last::first1_type> | |
49 | { | |
50 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
51 | static | |
52 | typename result_of::distance<typename First::first1_type, typename Last::first1_type>::type | |
53 | call(First const& first, Last const& last) | |
54 | { | |
55 | return boost::fusion::distance(first.first1, last.first1); | |
56 | } | |
57 | }; | |
58 | }; | |
59 | } | |
60 | }} | |
61 | ||
62 | #endif |