ceph/src/boost/libs/fusion/include/boost/fusion/algorithm/auxiliary/move.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2013 Joel de Guzman
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 ==============================================================================*/
   7 #if !defined(FUSION_MOVE_01192013_2225)
   8 #define FUSION_MOVE_01192013_2225
   9
  10 #include <boost/fusion/support/config.hpp>
  11 #include <boost/fusion/sequence/intrinsic/begin.hpp>
  12 #include <boost/fusion/sequence/intrinsic/end.hpp>
  13 #include <boost/fusion/sequence/intrinsic/size.hpp>
  14 #include <boost/fusion/sequence/comparison/detail/equal_to.hpp>
  15 #include <boost/fusion/support/is_sequence.hpp>
  16 #include <boost/config.hpp>
  17 #include <boost/static_assert.hpp>
  18 #include <boost/utility/enable_if.hpp>
  19 #include <boost/mpl/and.hpp>
  20
  21 #include <utility> // for std::move
  22
  23 #if defined (BOOST_MSVC)
  24 #  pragma warning(push)
  25 #  pragma warning (disable: 4100) // unreferenced formal parameter
  26 #endif
  27
  28 namespace boost { namespace fusion
  29 {
  30     namespace detail
  31     {
  32         template <typename Seq1, typename Seq2>
  33         struct sequence_move
  34         {
  35             typedef typename result_of::end<Seq1>::type end1_type;
  36             typedef typename result_of::end<Seq2>::type end2_type;
  37
  38             template <typename I1, typename I2>
  39             BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  40             static void
  41             call(I1 const&, I2 const&, mpl::true_)
  42             {
  43             }
  44
  45             template <typename I1, typename I2>
  46             BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  47             static void
  48             call(I1 const& src, I2 const& dest, mpl::false_)
  49             {
  50                 *dest = std::move(*src);
  51                 call(fusion::next(src), fusion::next(dest));
  52             }
  53
  54             template <typename I1, typename I2>
  55             BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  56             static void
  57             call(I1 const& src, I2 const& dest)
  58             {
  59                 typename result_of::equal_to<I1, end1_type>::type eq;
  60                 return call(src, dest, eq);
  61             }
  62         };
  63     }
  64
  65     namespace result_of
  66     {
  67         template <typename Seq1, typename Seq2>
  68         struct move
  69             : enable_if<mpl::and_<
  70                   traits::is_sequence<Seq1>,
  71                   traits::is_sequence<Seq2>
  72               > > {};
  73     }
  74
  75     template <typename Seq1, typename Seq2>
  76     BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  77     inline typename result_of::move<Seq1, Seq2>::type
  78     move(Seq1&& src, Seq2& dest)
  79     {
  80         BOOST_STATIC_ASSERT(
  81             result_of::size<Seq1>::value <= result_of::size<Seq2>::value);
  82
  83         detail::sequence_move<
  84             Seq1, Seq2>::
  85             call(fusion::begin(src), fusion::begin(dest));
  86     }
  87 }}
  88
  89 #if defined (BOOST_MSVC)
  90 #  pragma warning(pop)
  91 #endif
  92
  93 #endif