Re: [jamboost] BGL type relation question

From: David Abrahams (dave_at_[hidden])
Date: 2003-03-14 05:44:01

Jeff Holle <jeff.holle_at_[hidden]> writes:

> What is the relationship between an "edge_descriptor" and what an 
> edge_iterator dereferences?

The identity.

> I'm having problems coding the following:
>
>
> myFunct(GraphT& g)
> {
> typedef graph_traits<GraphT>::edge_descriptor Edge;
> typedef map< Edge, Edge_Datum> Edge_Data;
> Edge_Data edge_data;
> graph_traits<GraphT>::edge_iterator ei, ei_end;
> for(tie(ei,ei_end)=edges(graph);ei!=ei_end;++ei)
> edge_data.insert( make_pair(*ei, Edge_Data())); << blows up here.
> }

Your problem is the other half of the pair:

edge_data.insert( make_pair(*ei, Edge_Datum()));
^^^^^^^^^^
-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com