[Boost-users] BGL: edge index and bundled properties

From: Salvatore Domenick Desiano (sal_at_[hidden])
Date: 2007-11-28 15:20:37

After several hours of reading the newsgroups and working backward 
through BGL header files, I've accepted that I need help.

I have a graph with bundled properties. The edge properties include and 
index. I can't, for the life of me, figure out one thing:

   How do I get algorithms (e.g., those in subgraph) to see the edge
    index as a edge_index_t property?

My code is fairly simple (though my failed attempts at getting subgraph, et al, 
to find the edge index have been long). Formatted for brevity:

   struct _Vertex_Data { unsigned index; unsigned blob_id; };
   struct _Edge_Data { unsigned index; unsigned count; };
   typedef adjacency_list<setS,setS,undirectedS,_Vertex_Data,_Edge_Data> _BGL_Graph_Base;
   struct _Graph_Base : public _BGL_Graph_Base
   {
     typedef my_graph_tag graph_tag;
   };
   typedef subgraph<_Graph_Base> _Graph;

my_graph_tag is left over from a previous attempt, but I suspect it will be 
required to get this to work. I've tried overloading the property selectors, 
but I keep hitting a wall.

I have seen ways to do this with the older property structure, but my bundled 
properties will eventually be elaborate, so I'd like to use this mechanism.

I hope the BGL gurus are still around... the "classic" e-mails seem old...

Thank you for your time and help.

-- Sal
smile.