Chris@16: // (C) Copyright 2007-2009 Andrew Sutton
Chris@16: //
Chris@16: // Use, modification and distribution are subject to the
Chris@16: // Boost Software License, Version 1.0 (See accompanying file
Chris@16: // LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_GRAPH_DETAIL_INDEX_HPP
Chris@16: #define BOOST_GRAPH_DETAIL_INDEX_HPP
Chris@16: 
Chris@16: #include <boost/graph/graph_traits.hpp>
Chris@16: 
Chris@16: // The structures in this module are responsible for selecting and defining
Chris@16: // types for accessing a builting index map. Note that the selection of these
Chris@16: // types requires the Graph parameter to model either VertexIndexGraph or
Chris@16: // EdgeIndexGraph.
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16:     namespace detail
Chris@16:     {
Chris@16:         template <typename Graph>
Chris@16:         struct vertex_indexer
Chris@16:         {
Chris@16:             typedef vertex_index_t index_type;
Chris@16:             typedef typename property_map<Graph, vertex_index_t>::type map_type;
Chris@16:             typedef typename property_map<Graph, vertex_index_t>::const_type const_map_type;
Chris@16:             typedef typename property_traits<map_type>::value_type value_type;
Chris@16:             typedef typename graph_traits<Graph>::vertex_descriptor key_type;
Chris@16: 
Chris@16:             static const_map_type index_map(const Graph& g)
Chris@16:             { return get(vertex_index, g); }
Chris@16: 
Chris@16:             static map_type index_map(Graph& g)
Chris@16:             { return get(vertex_index, g); }
Chris@16: 
Chris@16:             static value_type index(key_type k, const Graph& g)
Chris@16:             { return get(vertex_index, g, k); }
Chris@16:         };
Chris@16: 
Chris@16:         template <typename Graph>
Chris@16:         struct edge_indexer
Chris@16:         {
Chris@16:             typedef edge_index_t index_type;
Chris@16:             typedef typename property_map<Graph, edge_index_t>::type map_type;
Chris@16:             typedef typename property_map<Graph, edge_index_t>::const_type const_map_type;
Chris@16:             typedef typename property_traits<map_type>::value_type value_type;
Chris@16:             typedef typename graph_traits<Graph>::edge_descriptor key_type;
Chris@16: 
Chris@16:             static const_map_type index_map(const Graph& g)
Chris@16:             { return get(edge_index, g); }
Chris@16: 
Chris@16:             static map_type index_map(Graph& g)
Chris@16:             { return get(edge_index, g); }
Chris@16: 
Chris@16:             static value_type index(key_type k, const Graph& g)
Chris@16:             { return get(edge_index, g, k); }
Chris@16:         };
Chris@16: 
Chris@16:         // NOTE: The Graph parameter MUST be a model of VertexIndexGraph or
Chris@16:         // VertexEdgeGraph - whichever type Key is selecting.
Chris@16:         template <typename Graph, typename Key>
Chris@16:         struct choose_indexer
Chris@16:         {
Chris@16:             typedef typename mpl::if_<
Chris@16:                     is_same<Key, typename graph_traits<Graph>::vertex_descriptor>,
Chris@16:                     vertex_indexer<Graph>,
Chris@16:                     edge_indexer<Graph>
Chris@16:                 >::type indexer_type;
Chris@16:             typedef typename indexer_type::index_type index_type;
Chris@16:         };
Chris@16:     }
Chris@16: }
Chris@16: 
Chris@16: #endif