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