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

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 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_COPY_02162011_2308)
   8 #define FUSION_COPY_02162011_2308
   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 #if defined (BOOST_MSVC)
  22 #  pragma warning(push)
  23 #  pragma warning (disable: 4100) // unreferenced formal parameter
  24 #endif
  25
  26 namespace boost { namespace fusion
  27 {
  28     namespace detail
  29     {
  30         template <typename Seq1, typename Seq2>
  31         struct sequence_copy
  32         {
  33             typedef typename result_of::end<Seq1>::type end1_type;
  34             typedef typename result_of::end<Seq2>::type end2_type;
  35
  36             template <typename I1, typename I2>
  37             BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  38             static void
  39             call(I1 const&, I2 const&, mpl::true_)
  40             {
  41             }
  42
  43             template <typename I1, typename I2>
  44             BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  45             static void
  46             call(I1 const& src, I2 const& dest, mpl::false_)
  47             {
  48                 *dest = *src;
  49                 call(fusion::next(src), fusion::next(dest));
  50             }
  51
  52             template <typename I1, typename I2>
  53             BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  54             static void
  55             call(I1 const& src, I2 const& dest)
  56             {
  57                 typename result_of::equal_to<I1, end1_type>::type eq;
  58                 return call(src, dest, eq);
  59             }
  60         };
  61     }
  62
  63     namespace result_of
  64     {
  65         template <typename Seq1, typename Seq2>
  66         struct copy
  67             : enable_if<mpl::and_<
  68                   traits::is_sequence<Seq1>,
  69                   traits::is_sequence<Seq2>
  70               > > {};
  71     }
  72
  73     template <typename Seq1, typename Seq2>
  74     BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  75     inline typename result_of::copy<Seq1 const, Seq2>::type
  76     copy(Seq1 const& src, Seq2& dest)
  77     {
  78         BOOST_STATIC_ASSERT(
  79             result_of::size<Seq1>::value <= result_of::size<Seq2>::value);
  80
  81         detail::sequence_copy<
  82             Seq1 const, Seq2>::
  83             call(fusion::begin(src), fusion::begin(dest));
  84     }
  85 }}
  86
  87 #if defined (BOOST_MSVC)
  88 #  pragma warning(pop)
  89 #endif
  90
  91 #endif