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/usr/include/boost/fusion/view/filter_view/filter_view.hpp
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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; // silence MSVC warning C4512: assignment operator could not be generated BOOST_DELETED_FUNCTION(filter_view& operator= (filter_view const&)) }; }} #endif
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