ceph/src/boost/boost/msm/mpl_graph/search_colors.hpp

   1 // Copyright 2008-2010 Gordon Woodhull
   2 // Distributed under the Boost Software License, Version 1.0.
   3 // (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   4
   5 #ifndef BOOST_MSM_MPL_GRAPH_SEARCH_COLORS_HPP_INCLUDED
   6 #define BOOST_MSM_MPL_GRAPH_SEARCH_COLORS_HPP_INCLUDED
   7
   8 namespace boost {
   9 namespace msm {
  10 namespace mpl_graph {
  11
  12 namespace search_colors {
  13     struct White {};
  14     struct Gray {};
  15     struct Black {};
  16 }
  17
  18 struct create_search_color_map : mpl::map<> {};
  19
  20 struct search_color_map_ops {
  21     template<typename Node, typename Color, typename State>
  22     struct set_color :
  23         mpl::insert<State, mpl::pair<Node, Color> >
  24     {};
  25     template<typename Node, typename State>
  26     struct get_color :
  27         mpl::if_<mpl::has_key<State, Node>,
  28                  mpl::at<State, Node>,
  29                  search_colors::White>
  30     {};
  31 };
  32
  33
  34 } // namespace mpl_graph
  35 } // namespace msm
  36 } // namespace boost
  37
  38
  39 #endif // BOOST_MSM_MPL_GRAPH_SEARCH_COLORS_HPP_INCLUDED