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- /*=============================================================================
- Copyright (c) 2001-2011 Joel de Guzman
- Distributed under the Boost Software License, Version 1.0. (See accompanying
- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- ==============================================================================*/
- #if !defined(FUSION_SEQUENCE_FILTER_VIEW_HPP)
- #define FUSION_SEQUENCE_FILTER_VIEW_HPP
- #include <boost/fusion/support/config.hpp>
- #include <boost/fusion/support/detail/access.hpp>
- #include <boost/fusion/support/sequence_base.hpp>
- #include <boost/fusion/support/is_view.hpp>
- #include <boost/fusion/view/filter_view/filter_view_iterator.hpp>
- #include <boost/fusion/view/filter_view/detail/begin_impl.hpp>
- #include <boost/fusion/view/filter_view/detail/end_impl.hpp>
- #include <boost/fusion/view/filter_view/detail/size_impl.hpp>
- #include <boost/fusion/sequence/intrinsic/begin.hpp>
- #include <boost/fusion/sequence/intrinsic/end.hpp>
- #include <boost/mpl/bool.hpp>
- #include <boost/mpl/eval_if.hpp>
- #include <boost/mpl/inherit.hpp>
- #include <boost/mpl/identity.hpp>
- namespace boost { namespace fusion
- {
- struct filter_view_tag;
- struct forward_traversal_tag;
- struct fusion_sequence_tag;
- template <typename Sequence, typename Pred>
- struct filter_view : sequence_base<filter_view<Sequence, Pred> >
- {
- typedef filter_view_tag fusion_tag;
- typedef fusion_sequence_tag tag; // this gets picked up by MPL
- typedef typename
- mpl::eval_if<
- traits::is_associative<Sequence>
- , mpl::inherit2<forward_traversal_tag,associative_tag>
- , mpl::identity<forward_traversal_tag>
- >::type
- category;
- typedef mpl::true_ is_view;
- typedef typename result_of::begin<Sequence>::type first_type;
- typedef typename result_of::end<Sequence>::type last_type;
- typedef Pred pred_type;
- BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
- filter_view(Sequence& in_seq)
- : seq(in_seq)
- {}
- BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
- first_type first() const { return fusion::begin(seq); }
- BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
- last_type last() const { return fusion::end(seq); }
- typename mpl::if_<traits::is_view<Sequence>, Sequence, Sequence&>::type seq;
- private:
- // silence MSVC warning C4512: assignment operator could not be generated
- filter_view& operator= (filter_view const&);
- };
- }}
- #endif
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