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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_FILTER_02122005_1839) | |
9 | #define FUSION_FILTER_02122005_1839 | |
10 | ||
11 | #include <boost/fusion/support/config.hpp> | |
12 | #include <boost/fusion/view/filter_view/filter_view.hpp> | |
13 | #include <boost/type_traits/is_same.hpp> | |
14 | ||
15 | namespace boost { namespace fusion | |
16 | { | |
17 | namespace result_of | |
18 | { | |
19 | template <typename Sequence, typename T> | |
20 | struct filter | |
21 | { | |
22 | typedef filter_view<Sequence, is_same<mpl::_, T> > type; | |
23 | }; | |
24 | } | |
25 | ||
26 | template <typename T, typename Sequence> | |
27 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
28 | inline typename result_of::filter<Sequence const, T>::type | |
29 | filter(Sequence const& seq) | |
30 | { | |
31 | return filter_view<const Sequence, is_same<mpl::_, T> >(seq); | |
32 | } | |
33 | }} | |
34 | ||
35 | #endif | |
36 |