150 lines
4.8 KiB
Plaintext
150 lines
4.8 KiB
Plaintext
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/*=============================================================================
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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_FOR_EACH_05052005_1028)
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#define FUSION_FOR_EACH_05052005_1028
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#include <boost/fusion/support/config.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/fusion/iterator/equal_to.hpp>
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#include <boost/fusion/iterator/next.hpp>
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#include <boost/fusion/iterator/deref.hpp>
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#include <boost/fusion/iterator/distance.hpp>
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#include <boost/fusion/support/category_of.hpp>
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#include <boost/mpl/bool.hpp>
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namespace boost { namespace fusion {
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namespace detail
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{
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template <typename First, typename Last, typename F>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline void
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for_each_linear(First const&, Last const&, F const&, mpl::true_)
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{
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}
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template <typename First, typename Last, typename F>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline void
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for_each_linear(First const& first, Last const& last, F const& f, mpl::false_)
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{
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f(*first);
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detail::for_each_linear(fusion::next(first), last, f,
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result_of::equal_to<typename result_of::next<First>::type, Last>());
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}
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template <typename Sequence, typename F, typename Tag>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline void
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for_each_dispatch(Sequence& seq, F const& f, Tag)
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{
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detail::for_each_linear(
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fusion::begin(seq)
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, fusion::end(seq)
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, f
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, result_of::equal_to<
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typename result_of::begin<Sequence>::type
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, typename result_of::end<Sequence>::type>());
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}
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template<int N>
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struct for_each_unrolled
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{
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template<typename I0, typename F>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static void call(I0 const& i0, F const& f)
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{
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f(*i0);
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typedef typename result_of::next<I0>::type I1;
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I1 i1(fusion::next(i0));
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f(*i1);
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typedef typename result_of::next<I1>::type I2;
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I2 i2(fusion::next(i1));
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f(*i2);
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typedef typename result_of::next<I2>::type I3;
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I3 i3(fusion::next(i2));
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f(*i3);
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for_each_unrolled<N-4>::call(fusion::next(i3), f);
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}
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};
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template<>
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struct for_each_unrolled<3>
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{
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template<typename I0, typename F>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static void call(I0 const& i0, F const& f)
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{
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f(*i0);
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typedef typename result_of::next<I0>::type I1;
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I1 i1(fusion::next(i0));
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f(*i1);
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typedef typename result_of::next<I1>::type I2;
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I2 i2(fusion::next(i1));
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f(*i2);
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}
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};
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template<>
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struct for_each_unrolled<2>
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{
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template<typename I0, typename F>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static void call(I0 const& i0, F const& f)
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{
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f(*i0);
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typedef typename result_of::next<I0>::type I1;
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I1 i1(fusion::next(i0));
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f(*i1);
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}
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};
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template<>
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struct for_each_unrolled<1>
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{
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template<typename I0, typename F>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static void call(I0 const& i0, F const& f)
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{
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f(*i0);
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}
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};
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template<>
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struct for_each_unrolled<0>
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{
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template<typename It, typename F>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static void call(It const&, F const&)
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{
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}
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};
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template <typename Sequence, typename F>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline void
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for_each_dispatch(Sequence& seq, F const& f, random_access_traversal_tag)
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{
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typedef typename result_of::begin<Sequence>::type begin;
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typedef typename result_of::end<Sequence>::type end;
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for_each_unrolled<result_of::distance<begin, end>::type::value>::call(fusion::begin(seq), f);
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}
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template <typename Sequence, typename F>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline void
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for_each(Sequence& seq, F const& f, mpl::false_) // unsegmented implementation
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{
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detail::for_each_dispatch(seq, f, typename traits::category_of<Sequence>::type());
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}
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}}}
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#endif
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