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