[Boost-users] [BGL] more difficulties in accessing bundled properties

From: Shufei Fan (fansf_at_[hidden])
Date: 2007-04-09 16:50:59

Using the replied method, my initial difficulty was resolved. However, when I 
introduce more properties into my vertex bundle, I am baffled again. I figure 
some fundamental understanding of bundle property is necessary for me(It is 
appreciated, if someone can hint on this)

This time, my graph definition is: 
/////////////////////////////////////////////////////////////////////
struct Node
{
        int count;
        int matched_to;
        std::vector<int> absorb;
        double mode[3];
        double center[2];
        int extremes[4];
};

struct Edge
{
        double maxBoundaryPoints;
                  double	eWeight;
  unsigned short	nTh;
};

//the following provided by Stephan
//For accessing Node::mode[3], etc:
//pointer to Node-Mode
//new specialization of property_map for bundles with arrays
namespace boost{
    template <typename Graph, typename T, typename Bundle, unsigned int Size>
  struct property_map<Graph, T (Bundle::*) [Size]>  
  {
private:
    typedef graph_traits<Graph> traits;
    typedef typename Graph::vertex_bundled vertex_bundled;
    typedef typename Graph::edge_bundled edge_bundled;
    typedef typename mpl::if_c<(detail::is_vertex_bundle<vertex_bundled, 
edge_bundled, Bundle>::value), 
            typename traits::vertex_descriptor,
            typename traits::edge_descriptor>::type
      descriptor;
    typedef typename mpl::if_c<(detail::is_vertex_bundle<vertex_bundled, 
edge_bundled, Bundle>::value), 
            vertex_bundled,
            edge_bundled>::type
      actual_bundle;
    
public:
            typedef bundle_property_map<Graph, descriptor, actual_bundle, T
[Size]> type;
    typedef bundle_property_map<const Graph, descriptor, actual_bundle, const T
[Size]> 
      const_type;
  };
    
};

typedef boost::adjacency_list<
    boost::listS, boost::listS, boost::bidirectionalS,
        boost::property<vertex_index_t, int, Node>, Edge> Graph;
////////////////////////////////////////////////////////////////////////////
In my appliication, I defined a class GA, containing pointer of type Graph. 
And my compiling error comes from constructor of GA, as detailed follows:
///////////////////////////////////////////////////////////////////
class GA {
....
    Graph *rowGraph;
....
    GA(){};//compiling error occurs here
    GA(*, *, *);
....
}

GA::GA(*, *, *)
{//compiling error occurs here, too

}
///////////////////////////////////////////////////////

And my compiling error comes from constructor of GA, but it is clearly related 
from above work-around for accessing bundled array. Any clues?

c:\shufei\VCProjects\edison\segm\GA.h(182) : error 
C2512: 'boost::bundle_property_map<Graph,Descriptor,Bundle,T>' : no 
appropriate default constructor available
        with
        [
            Graph=Graph,
            Descriptor=boost::property_map<Graph,int Node::* >::descriptor,
            Bundle=Node,
            T=int
        ]

Thanks