141 lines
4.2 KiB
Plaintext
141 lines
4.2 KiB
Plaintext
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/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2005 Eric Niebler
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Copyright (c) 2007 Dan Marsden
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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_ANY_05052005_1229)
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#define FUSION_ANY_05052005_1229
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#include <boost/fusion/support/config.hpp>
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#include <boost/mpl/bool.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/advance.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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namespace boost { namespace fusion {
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struct random_access_traversal_tag;
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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_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline bool
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linear_any(First const&, Last const&, F const&, mpl::true_)
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{
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return false;
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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 bool
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linear_any(First const& first, Last const& last, F& f, mpl::false_)
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{
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typename result_of::deref<First>::type x = *first;
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return f(x) ||
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detail::linear_any(
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fusion::next(first)
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, last
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, 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_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline bool
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any(Sequence const& seq, F f, Tag)
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{
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return detail::linear_any(
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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 unrolled_any
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{
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template <typename It, typename F>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static bool call(It const& it, F f)
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{
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return
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f(*it) ||
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f(*fusion::advance_c<1>(it))||
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f(*fusion::advance_c<2>(it)) ||
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f(*fusion::advance_c<3>(it)) ||
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detail::unrolled_any<N-4>::call(fusion::advance_c<4>(it), f);
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}
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};
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template<>
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struct unrolled_any<3>
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{
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template <typename It, typename F>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static bool call(It const& it, F f)
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{
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return
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f(*it) ||
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f(*fusion::advance_c<1>(it)) ||
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f(*fusion::advance_c<2>(it));
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}
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};
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template<>
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struct unrolled_any<2>
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{
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template <typename It, typename F>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static bool call(It const& it, F f)
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{
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return
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f(*it) ||
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f(*fusion::advance_c<1>(it));
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}
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};
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template<>
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struct unrolled_any<1>
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{
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template <typename It, typename F>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static bool call(It const& it, F f)
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{
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return f(*it);
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}
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};
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template<>
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struct unrolled_any<0>
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{
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template <typename It, typename F>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static bool call(It const&, F)
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{
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return false;
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}
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};
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template <typename Sequence, typename F>
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline bool
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any(Sequence const& seq, F 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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return detail::unrolled_any<result_of::distance<begin, end>::type::value>::call(
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fusion::begin(seq), f);
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}
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}}}
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#endif
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