// (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 |