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
filter(Sequence const & seq)29     filter(Sequence const& seq)
30     {
31         return filter_view<const Sequence, is_same<mpl::_, T> >(seq);
32     }
33 }}
34 
35 #endif
36 
37