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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_SIZE_IMPL_09232005_1058) | |
8 | #define FUSION_SIZE_IMPL_09232005_1058 | |
9 | ||
10 | #include <boost/fusion/support/config.hpp> | |
11 | #include <boost/fusion/iterator/distance.hpp> | |
12 | #include <boost/fusion/sequence/intrinsic/begin.hpp> | |
13 | #include <boost/fusion/sequence/intrinsic/end.hpp> | |
14 | ||
15 | namespace boost { namespace fusion | |
16 | { | |
17 | struct filter_view_tag; | |
18 | ||
19 | namespace extension | |
20 | { | |
21 | template <typename Tag> | |
22 | struct size_impl; | |
23 | ||
24 | template <> | |
25 | struct size_impl<filter_view_tag> | |
26 | { | |
27 | template <typename Sequence> | |
28 | struct apply | |
29 | : result_of::distance< | |
30 | typename result_of::begin<Sequence>::type | |
31 | , typename result_of::end<Sequence>::type> | |
32 | {}; | |
33 | }; | |
34 | } | |
35 | }} | |
36 | ||
37 | #endif | |
38 | ||
39 |