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