ceph/src/boost/libs/fusion/include/boost/fusion/support/detail/mpl_iterator_category.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_MPL_ITERATOR_CATEGORY_07212005_0923)
   8 #define FUSION_MPL_ITERATOR_CATEGORY_07212005_0923
   9
  10 namespace boost { namespace mpl
  11 {
  12     struct forward_iterator_tag;
  13     struct bidirectional_iterator_tag;
  14     struct random_access_iterator_tag;
  15 }}
  16
  17 namespace boost { namespace fusion
  18 {
  19     struct forward_traversal_tag;
  20     struct bidirectional_traversal_tag;
  21     struct random_access_traversal_tag;
  22 }}
  23
  24 namespace boost { namespace fusion { namespace detail
  25 {
  26     template <typename Category>
  27     struct mpl_iterator_category;
  28
  29     template <>
  30     struct mpl_iterator_category<mpl::forward_iterator_tag>
  31     {
  32         typedef forward_traversal_tag type;
  33     };
  34
  35     template <>
  36     struct mpl_iterator_category<mpl::bidirectional_iterator_tag>
  37     {
  38         typedef bidirectional_traversal_tag type;
  39     };
  40
  41     template <>
  42     struct mpl_iterator_category<mpl::random_access_iterator_tag>
  43     {
  44         typedef random_access_traversal_tag type;
  45     };
  46
  47     template <>
  48     struct mpl_iterator_category<forward_traversal_tag>
  49     {
  50         typedef forward_traversal_tag type;
  51     };
  52
  53     template <>
  54     struct mpl_iterator_category<bidirectional_traversal_tag>
  55     {
  56         typedef bidirectional_traversal_tag type;
  57     };
  58
  59     template <>
  60     struct mpl_iterator_category<random_access_traversal_tag>
  61     {
  62         typedef random_access_traversal_tag type;
  63     };
  64 }}}
  65
  66 #endif