1 /*=============================================================================
2 Copyright (c) 2001-2011 Joel de Guzman
3 Copyright (c) 2005-2006 Dan Marsden
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
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>
15 namespace boost { namespace fusion
19 template <typename Sequence, typename T>
22 typedef filter_view<Sequence, is_same<mpl::_, T> > type;
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)
31 return filter_view<const Sequence, is_same<mpl::_, T> >(seq);