ceph/src/boost/libs/fusion/include/boost/fusion/container/set/detail/as_set.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_SET_11062014_2121
   8 #define FUSION_AS_SET_11062014_2121
   9
  10 #include <boost/fusion/support/config.hpp>
  11 #include <boost/fusion/container/set/set_fwd.hpp>
  12
  13 ///////////////////////////////////////////////////////////////////////////////
  14 // Without variadics, we will use the PP version
  15 ///////////////////////////////////////////////////////////////////////////////
  16 #if !defined(BOOST_FUSION_HAS_VARIADIC_SET)
  17 # include <boost/fusion/container/set/detail/cpp03/as_set.hpp>
  18 #else
  19
  20 ///////////////////////////////////////////////////////////////////////////////
  21 // C++11 interface
  22 ///////////////////////////////////////////////////////////////////////////////
  23 #include <boost/fusion/support/detail/index_sequence.hpp>
  24 #include <boost/fusion/container/set/set.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 <int size
  35             , typename = typename detail::make_index_sequence<size>::type>
  36     struct as_set;
  37
  38     template <int size, std::size_t ...Indices>
  39     struct as_set<size, detail::index_sequence<Indices...> >
  40     {
  41         template <typename I>
  42         struct apply
  43         {
  44             typedef set<
  45                 typename result_of::value_of<
  46                     typename result_of::advance_c<I, Indices>::type
  47                 >::type...
  48             > type;
  49         };
  50
  51         template <typename Iterator>
  52         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  53         static typename apply<Iterator>::type
  54         call(Iterator const& i)
  55         {
  56             typedef apply<Iterator> gen;
  57             typedef typename gen::type result;
  58             return result(*advance_c<Indices>(i)...);
  59         }
  60     };
  61
  62 BOOST_FUSION_BARRIER_END
  63 }}}
  64
  65 #endif
  66 #endif
  67