ceph/src/boost/boost/graph/detail/index.hpp

   1 // (C) Copyright 2007-2009 Andrew Sutton
   2 //
   3 // Use, modification and distribution are subject to the
   4 // Boost Software License, Version 1.0 (See accompanying file
   5 // LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #ifndef BOOST_GRAPH_DETAIL_INDEX_HPP
   8 #define BOOST_GRAPH_DETAIL_INDEX_HPP
   9
  10 #include <boost/graph/graph_traits.hpp>
  11
  12 // The structures in this module are responsible for selecting and defining
  13 // types for accessing a builting index map. Note that the selection of these
  14 // types requires the Graph parameter to model either VertexIndexGraph or
  15 // EdgeIndexGraph.
  16
  17 namespace boost
  18 {
  19 namespace detail
  20 {
  21     template < typename Graph > struct vertex_indexer
  22     {
  23         typedef vertex_index_t index_type;
  24         typedef typename property_map< Graph, vertex_index_t >::type map_type;
  25         typedef typename property_map< Graph, vertex_index_t >::const_type
  26             const_map_type;
  27         typedef typename property_traits< map_type >::value_type value_type;
  28         typedef typename graph_traits< Graph >::vertex_descriptor key_type;
  29
  30         static const_map_type index_map(const Graph& g)
  31         {
  32             return get(vertex_index, g);
  33         }
  34
  35         static map_type index_map(Graph& g) { return get(vertex_index, g); }
  36
  37         static value_type index(key_type k, const Graph& g)
  38         {
  39             return get(vertex_index, g, k);
  40         }
  41     };
  42
  43     template < typename Graph > struct edge_indexer
  44     {
  45         typedef edge_index_t index_type;
  46         typedef typename property_map< Graph, edge_index_t >::type map_type;
  47         typedef typename property_map< Graph, edge_index_t >::const_type
  48             const_map_type;
  49         typedef typename property_traits< map_type >::value_type value_type;
  50         typedef typename graph_traits< Graph >::edge_descriptor key_type;
  51
  52         static const_map_type index_map(const Graph& g)
  53         {
  54             return get(edge_index, g);
  55         }
  56
  57         static map_type index_map(Graph& g) { return get(edge_index, g); }
  58
  59         static value_type index(key_type k, const Graph& g)
  60         {
  61             return get(edge_index, g, k);
  62         }
  63     };
  64
  65     // NOTE: The Graph parameter MUST be a model of VertexIndexGraph or
  66     // VertexEdgeGraph - whichever type Key is selecting.
  67     template < typename Graph, typename Key > struct choose_indexer
  68     {
  69         typedef typename mpl::if_<
  70             is_same< Key, typename graph_traits< Graph >::vertex_descriptor >,
  71             vertex_indexer< Graph >, edge_indexer< Graph > >::type indexer_type;
  72         typedef typename indexer_type::index_type index_type;
  73     };
  74 }
  75 }
  76
  77 #endif