65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
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/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2006 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(BOOST_FUSION_SWAP_20070501_1956)
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#define BOOST_FUSION_SWAP_20070501_1956
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#include <boost/fusion/support/config.hpp>
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#include <algorithm>
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#include <boost/fusion/support/is_sequence.hpp>
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#include <boost/fusion/view/zip_view.hpp>
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#include <boost/fusion/algorithm/iteration/for_each.hpp>
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#include <boost/fusion/sequence/intrinsic/front.hpp>
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#include <boost/fusion/sequence/intrinsic/back.hpp>
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#include <boost/core/enable_if.hpp>
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#include <boost/mpl/and.hpp>
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namespace boost { namespace fusion {
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namespace result_of
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{
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template<typename Seq1, typename Seq2>
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struct swap
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: enable_if<mpl::and_<
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traits::is_sequence<Seq1>,
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traits::is_sequence<Seq2>
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> > {};
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}
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namespace detail
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{
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struct swap
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{
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template<typename Elem>
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struct result
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{
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typedef void type;
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};
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template<typename Elem>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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void operator()(Elem const& e) const
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{
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using std::swap;
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swap(front(e), back(e));
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}
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};
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}
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template<typename Seq1, typename Seq2>
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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inline typename result_of::swap<Seq1, Seq2>::type
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swap(Seq1& lhs, Seq2& rhs)
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{
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typedef vector<Seq1&, Seq2&> references;
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for_each(zip_view<references>(references(lhs, rhs)), detail::swap());
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}
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}}
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#endif
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