1 /*=============================================================================
2     Copyright (c) 2001-2006 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/view/filter_view/filter_view.hpp>
12 #include <boost/type_traits/is_same.hpp>
13 
14 namespace boost { namespace fusion
15 {
16     namespace result_of
17     {
18         template <typename Sequence, typename T>
19         struct filter
20         {
21             typedef filter_view<Sequence, is_same<mpl::_, T> > type;
22         };
23     }
24 
25     template <typename T, typename Sequence>
26     inline typename result_of::filter<Sequence const, T>::type
filter(Sequence const & seq)27     filter(Sequence const& seq)
28     {
29         return filter_view<const Sequence, is_same<mpl::_, T> >(seq);
30     }
31 }}
32 
33 #endif
34 
35