From: jsiek_at_[hidden]
Date: 1999-12-11 20:07:22
jsiek_at_[hidden] writes:
> AdjacencyMatrix: refines both VertexListGraph and EdgeListGraph
> bool flag = has_edge(v,v,g)
> e = edge(v,v,g)
>
another option is to not have the has_edge() function, and
have a special value of edge descriptor for non-existent
edges.