Boost C++ Libraries

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This is the documentation for a snapshot of the develop branch, built from commit 9f374162ba.

boost/graph/properties.hpp

//=======================================================================
// Copyright 1997, 1998, 1999, 2000 University of Notre Dame.
// Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//=======================================================================

#ifndef BOOST_GRAPH_PROPERTIES_HPP
#define BOOST_GRAPH_PROPERTIES_HPP

#include <boost/config.hpp>
#include <boost/assert.hpp>
#include <boost/pending/property.hpp>
#include <boost/detail/workaround.hpp>

// Include the property map library and extensions in the BGL.
#include <boost/property_map/property_map.hpp>
#include <boost/graph/property_maps/constant_property_map.hpp>
#include <boost/graph/property_maps/null_property_map.hpp>

#include <boost/graph/graph_traits.hpp>
#include <boost/type_traits.hpp>
#include <boost/limits.hpp>
#include <boost/mpl/and.hpp>
#include <boost/mpl/not.hpp>
#include <boost/mpl/if.hpp>

namespace boost
{

enum default_color_type
{
    white_color,
    gray_color,
    green_color,
    red_color,
    black_color
};

template < class ColorValue > struct color_traits
{
    static default_color_type white() { return white_color; }
    static default_color_type gray() { return gray_color; }
    static default_color_type green() { return green_color; }
    static default_color_type red() { return red_color; }
    static default_color_type black() { return black_color; }
};

// These functions are now obsolete, replaced by color_traits.
inline default_color_type white(default_color_type) { return white_color; }
inline default_color_type gray(default_color_type) { return gray_color; }
inline default_color_type green(default_color_type) { return green_color; }
inline default_color_type red(default_color_type) { return red_color; }
inline default_color_type black(default_color_type) { return black_color; }

struct graph_property_tag
{
};
struct vertex_property_tag
{
};
struct edge_property_tag
{
};

// See examples/edge_property.cpp for how to use this.
#define BOOST_INSTALL_PROPERTY(KIND, NAME)                \
    template <> struct property_kind< KIND##_##NAME##_t > \
    {                                                     \
        typedef KIND##_property_tag type;                 \
    }

#define BOOST_DEF_PROPERTY(KIND, NAME)        \
    enum KIND##_##NAME##_t { KIND##_##NAME }; \
    BOOST_INSTALL_PROPERTY(KIND, NAME)

// These three are defined in boost/pending/property.hpp
BOOST_INSTALL_PROPERTY(vertex, all);
BOOST_INSTALL_PROPERTY(edge, all);
BOOST_INSTALL_PROPERTY(graph, all);
BOOST_DEF_PROPERTY(vertex, index);
BOOST_DEF_PROPERTY(vertex, index1);
BOOST_DEF_PROPERTY(vertex, index2);
BOOST_DEF_PROPERTY(vertex, root);
BOOST_DEF_PROPERTY(edge, index);
BOOST_DEF_PROPERTY(edge, name);
BOOST_DEF_PROPERTY(edge, weight);
BOOST_DEF_PROPERTY(edge, weight2);
BOOST_DEF_PROPERTY(edge, color);
BOOST_DEF_PROPERTY(vertex, name);
BOOST_DEF_PROPERTY(graph, name);
BOOST_DEF_PROPERTY(vertex, distance);
BOOST_DEF_PROPERTY(vertex, distance2);
BOOST_DEF_PROPERTY(vertex, color);
BOOST_DEF_PROPERTY(vertex, degree);
BOOST_DEF_PROPERTY(vertex, in_degree);
BOOST_DEF_PROPERTY(vertex, out_degree);
BOOST_DEF_PROPERTY(vertex, current_degree);
BOOST_DEF_PROPERTY(vertex, priority);
BOOST_DEF_PROPERTY(vertex, discover_time);
BOOST_DEF_PROPERTY(vertex, finish_time);
BOOST_DEF_PROPERTY(vertex, predecessor);
BOOST_DEF_PROPERTY(vertex, rank);
BOOST_DEF_PROPERTY(vertex, centrality);
BOOST_DEF_PROPERTY(vertex, lowpoint);
BOOST_DEF_PROPERTY(vertex, potential);
BOOST_DEF_PROPERTY(vertex, update);
BOOST_DEF_PROPERTY(vertex, underlying);
BOOST_DEF_PROPERTY(edge, reverse);
BOOST_DEF_PROPERTY(edge, capacity);
BOOST_DEF_PROPERTY(edge, flow);
BOOST_DEF_PROPERTY(edge, residual_capacity);
BOOST_DEF_PROPERTY(edge, centrality);
BOOST_DEF_PROPERTY(edge, discover_time);
BOOST_DEF_PROPERTY(edge, update);
BOOST_DEF_PROPERTY(edge, finished);
BOOST_DEF_PROPERTY(edge, underlying);
BOOST_DEF_PROPERTY(graph, visitor);

// These tags are used for property bundles
// These three are defined in boost/pending/property.hpp
BOOST_INSTALL_PROPERTY(graph, bundle);
BOOST_INSTALL_PROPERTY(vertex, bundle);
BOOST_INSTALL_PROPERTY(edge, bundle);

// These tags are used to denote the owners and local descriptors
// for the vertices and edges of a distributed graph.
BOOST_DEF_PROPERTY(vertex, global);
BOOST_DEF_PROPERTY(vertex, owner);
BOOST_DEF_PROPERTY(vertex, local);
BOOST_DEF_PROPERTY(edge, global);
BOOST_DEF_PROPERTY(edge, owner);
BOOST_DEF_PROPERTY(edge, local);
BOOST_DEF_PROPERTY(vertex, local_index);
BOOST_DEF_PROPERTY(edge, local_index);

#undef BOOST_DEF_PROPERTY

namespace detail
{

    template < typename G, typename Tag >
    struct property_kind_from_graph : property_kind< Tag >
    {
    };

#ifndef BOOST_GRAPH_NO_BUNDLED_PROPERTIES
    template < typename G, typename R, typename T >
    struct property_kind_from_graph< G, R T::* >
    {
        typedef typename boost::mpl::if_<
            boost::is_base_of< T, typename vertex_bundle_type< G >::type >,
            vertex_property_tag,
            typename boost::mpl::if_<
                boost::is_base_of< T, typename edge_bundle_type< G >::type >,
                edge_property_tag,
                typename boost::mpl::if_<
                    boost::is_base_of< T,
                        typename graph_bundle_type< G >::type >,
                    graph_property_tag, void >::type >::type >::type type;
    };
#endif

    struct dummy_edge_property_selector
    {
        template < class Graph, class Property, class Tag > struct bind_
        {
            typedef identity_property_map type;
            typedef identity_property_map const_type;
        };
    };
    struct dummy_vertex_property_selector
    {
        template < class Graph, class Property, class Tag > struct bind_
        {
            typedef identity_property_map type;
            typedef identity_property_map const_type;
        };
    };

} // namespace detail

// Graph classes can either partially specialize property_map
// or they can specialize these two selector classes.
template < class GraphTag > struct edge_property_selector
{
    typedef detail::dummy_edge_property_selector type;
};

template < class GraphTag > struct vertex_property_selector
{
    typedef detail::dummy_vertex_property_selector type;
};

namespace detail
{

    template < typename A > struct return_void
    {
        typedef void type;
    };

    template < typename Graph, typename Enable = void > struct graph_tag_or_void
    {
        typedef void type;
    };

    template < typename Graph >
    struct graph_tag_or_void< Graph,
        typename return_void< typename Graph::graph_tag >::type >
    {
        typedef typename Graph::graph_tag type;
    };

    template < class Graph, class PropertyTag >
    struct edge_property_map
    : edge_property_selector< typename graph_tag_or_void< Graph >::type >::
          type::template bind_< Graph,
              typename edge_property_type< Graph >::type, PropertyTag >
    {
    };
    template < class Graph, class PropertyTag >
    struct vertex_property_map
    : vertex_property_selector< typename graph_tag_or_void< Graph >::type >::
          type::template bind_< Graph,
              typename vertex_property_type< Graph >::type, PropertyTag >
    {
    };
} // namespace detail

template < class Graph, class Property, class Enable = void >
struct property_map
: mpl::if_< is_same< typename detail::property_kind_from_graph< Graph,
                         Property >::type,
                edge_property_tag >,
      detail::edge_property_map< Graph, Property >,
      detail::vertex_property_map< Graph, Property > >::type
{
};

// shortcut for accessing the value type of the property map
template < class Graph, class Property > class property_map_value
{
    typedef typename property_map< Graph, Property >::const_type PMap;

public:
    typedef typename property_traits< PMap >::value_type type;
};

template < class Graph, class Property > class graph_property
{
public:
    typedef typename property_value<
        typename boost::graph_property_type< Graph >::type, Property >::type
        type;
};

template < typename Graph >
struct vertex_property : vertex_property_type< Graph >
{
};
template < typename Graph > struct edge_property : edge_property_type< Graph >
{
};

template < typename Graph >
class degree_property_map
: public put_get_helper< typename graph_traits< Graph >::degree_size_type,
      degree_property_map< Graph > >
{
public:
    typedef typename graph_traits< Graph >::vertex_descriptor key_type;
    typedef typename graph_traits< Graph >::degree_size_type value_type;
    typedef value_type reference;
    typedef readable_property_map_tag category;
    degree_property_map(const Graph& g) : m_g(g) {}
    value_type operator[](const key_type& v) const { return degree(v, m_g); }

private:
    const Graph& m_g;
};
template < typename Graph >
inline degree_property_map< Graph > make_degree_map(const Graph& g)
{
    return degree_property_map< Graph >(g);
}

//========================================================================
// Iterator Property Map Generating Functions contributed by
// Kevin Vanhorn. (see also the property map generating functions
// in boost/property_map/property_map.hpp)

#if !defined(BOOST_NO_STD_ITERATOR_TRAITS)
// A helper function for creating a vertex property map out of a
// random access iterator and the internal vertex index map from a
// graph.
template < class PropertyGraph, class RandomAccessIterator >
inline iterator_property_map< RandomAccessIterator,
    typename property_map< PropertyGraph, vertex_index_t >::type,
    typename std::iterator_traits< RandomAccessIterator >::value_type,
    typename std::iterator_traits< RandomAccessIterator >::reference >
make_iterator_vertex_map(RandomAccessIterator iter, const PropertyGraph& g)
{
    return make_iterator_property_map(iter, get(vertex_index, g));
}

// Use this next function when vertex_descriptor is known to be an
// integer type, with values ranging from 0 to num_vertices(g).
//
template < class RandomAccessIterator >
inline iterator_property_map< RandomAccessIterator, identity_property_map,
    typename std::iterator_traits< RandomAccessIterator >::value_type,
    typename std::iterator_traits< RandomAccessIterator >::reference >
make_iterator_vertex_map(RandomAccessIterator iter)
{
    return make_iterator_property_map(iter, identity_property_map());
}
#endif

template < class PropertyGraph, class RandomAccessContainer >
inline iterator_property_map< typename RandomAccessContainer::iterator,
    typename property_map< PropertyGraph, vertex_index_t >::type,
    typename RandomAccessContainer::value_type,
    typename RandomAccessContainer::reference >
make_container_vertex_map(RandomAccessContainer& c, const PropertyGraph& g)
{
    BOOST_ASSERT(c.size() >= num_vertices(g));
    return make_iterator_vertex_map(c.begin(), g);
}

template < class RandomAccessContainer >
inline iterator_property_map< typename RandomAccessContainer::iterator,
    identity_property_map, typename RandomAccessContainer::value_type,
    typename RandomAccessContainer::reference >
make_container_vertex_map(RandomAccessContainer& c)
{
    return make_iterator_vertex_map(c.begin());
}

// NOTE: These functions are declared, but never defined since they need to
// be overloaded by graph implementations. However, we need them to be
// declared for the functions below.
template < typename Graph, typename Tag >
typename graph_property< Graph, graph_bundle_t >::type& get_property(
    Graph& g, Tag);

template < typename Graph, typename Tag >
typename graph_property< Graph, graph_bundle_t >::type const& get_property(
    Graph const& g, Tag);

#ifndef BOOST_GRAPH_NO_BUNDLED_PROPERTIES
// NOTE: This operation is a simple adaptor over the overloaded get_property
// operations.
template < typename Graph >
inline typename graph_property< Graph, graph_bundle_t >::type& get_property(
    Graph& g)
{
    return get_property(g, graph_bundle);
}

template < typename Graph >
inline typename graph_property< Graph, graph_bundle_t >::type const&
get_property(const Graph& g)
{
    return get_property(g, graph_bundle);
}
#endif

} // namespace boost

#endif /* BOOST_GRAPH_PROPERTIES_HPP */