ceph/src/boost/libs/fusion/example/extension/detail/value_at_impl.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 Joel de Guzman
   3     Copyright (c) 2005-2006 Dan Marsden
   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(BOOST_FUSION_VALUE_AT_IMPL_20060223_2025)
   9 #define BOOST_FUSION_VALUE_AT_IMPL_20060223_2025
  10
  11 namespace example
  12 {
  13     struct example_sequence_tag;
  14 }
  15
  16 namespace boost { namespace fusion {
  17
  18     namespace extension
  19     {
  20         template<typename Tag>
  21         struct value_at_impl;
  22
  23         template<>
  24         struct value_at_impl<example::example_sequence_tag>
  25         {
  26             template<typename Sequence, typename N>
  27             struct apply;
  28
  29             template<typename Sequence>
  30             struct apply<Sequence, mpl::int_<0> >
  31             {
  32                 typedef std::string type;
  33             };
  34
  35             template<typename Sequence>
  36             struct apply<Sequence, mpl::int_<1> >
  37             {
  38                 typedef int type;
  39             };
  40         };
  41     }
  42 }}
  43
  44 #endif