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59 lines
1.7 KiB
59 lines
1.7 KiB
/*============================================================================= |
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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 <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/utility/enable_if.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/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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{ |
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typedef void type; |
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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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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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typename enable_if<mpl::and_<traits::is_sequence<Seq1>, traits::is_sequence<Seq2> >, void>::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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