ceph/src/boost/libs/fusion/include/boost/fusion/container/vector/detail/as_vector.hpp

   1 /*=============================================================================
   2     Copyright (c) 2014-2015 Kohei Takahashi
   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 #ifndef FUSION_AS_VECTOR_11052014_1801
   8 #define FUSION_AS_VECTOR_11052014_1801
   9
  10 #include <boost/fusion/support/config.hpp>
  11 #include <boost/fusion/container/vector/detail/config.hpp>
  12
  13 ///////////////////////////////////////////////////////////////////////////////
  14 // Without variadics, we will use the PP version
  15 ///////////////////////////////////////////////////////////////////////////////
  16 #if !defined(BOOST_FUSION_HAS_VARIADIC_VECTOR)
  17 # include <boost/fusion/container/vector/detail/cpp03/as_vector.hpp>
  18 #else
  19
  20 ///////////////////////////////////////////////////////////////////////////////
  21 // C++11 interface
  22 ///////////////////////////////////////////////////////////////////////////////
  23 #include <boost/fusion/support/detail/index_sequence.hpp>
  24 #include <boost/fusion/container/vector/vector.hpp>
  25 #include <boost/fusion/iterator/value_of.hpp>
  26 #include <boost/fusion/iterator/deref.hpp>
  27 #include <boost/fusion/iterator/advance.hpp>
  28 #include <cstddef>
  29
  30 namespace boost { namespace fusion { namespace detail
  31 {
  32 BOOST_FUSION_BARRIER_BEGIN
  33
  34     template <typename Indices>
  35     struct as_vector_impl;
  36
  37     template <std::size_t ...Indices>
  38     struct as_vector_impl<index_sequence<Indices...> >
  39     {
  40         template <typename Iterator>
  41         struct apply
  42         {
  43             typedef vector<
  44                 typename result_of::value_of<
  45                     typename result_of::advance_c<Iterator, Indices>::type
  46                 >::type...
  47             > type;
  48         };
  49
  50         template <typename Iterator>
  51         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  52         static typename apply<Iterator>::type
  53         call(Iterator i)
  54         {
  55             typedef typename apply<Iterator>::type result;
  56             return result(*advance_c<Indices>(i)...);
  57         }
  58     };
  59
  60     template <int size>
  61     struct as_vector
  62         : as_vector_impl<typename make_index_sequence<size>::type> {};
  63
  64 BOOST_FUSION_BARRIER_END
  65 }}}
  66
  67 #endif
  68 #endif
  69
  70