ceph/src/boost/boost/fusion/container/list/detail/begin_impl.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 Joel de Guzman
   3     Copyright (c) 2005 Eric Niebler
   4
   5     Distributed under the Boost Software License, Version 1.0. (See accompanying
   6     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7 ==============================================================================*/
   8 #if !defined(FUSION_BEGIN_IMPL_07172005_0824)
   9 #define FUSION_BEGIN_IMPL_07172005_0824
  10
  11 #include <boost/fusion/support/config.hpp>
  12 #include <boost/mpl/if.hpp>
  13 #include <boost/type_traits/is_const.hpp>
  14
  15 namespace boost { namespace fusion
  16 {
  17     struct nil_;
  18
  19     struct cons_tag;
  20
  21     template <typename Car, typename Cdr>
  22     struct cons;
  23
  24     template <typename Cons>
  25     struct cons_iterator;
  26
  27     namespace extension
  28     {
  29         template <typename Tag>
  30         struct begin_impl;
  31
  32         template <>
  33         struct begin_impl<cons_tag>
  34         {
  35             template <typename Sequence>
  36             struct apply
  37             {
  38                 typedef cons_iterator<Sequence> type;
  39
  40                 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  41                 static type
  42                 call(Sequence& t)
  43                 {
  44                     return type(t);
  45                 }
  46             };
  47         };
  48     }
  49 }}
  50
  51 #endif