Re: [Boost-users] [BGL] filtered graph missing vertex function

Hi Moritz, 2006/9/5, moritz Hilger : - Zitierten Text anzeigen -

is there a particular reason that the filtered graph is missing a vertex_descriptor vertex(vertices_size_type, const& filtered_graph) function? of course this would return exactly the same as the one of the underlying graph, nevertheless it would be handy for code treating filtered graphs the same way as normal ones.

I think the problem here is the return value of the function. If you have a VertexPredicate set, it would be possible that the vertex you specify through the index doesn't exist in the filtered graph. Maybe a null_vertex() could be returned in that case (But, IIRC, that null_vertex() doesn't exist in every graph). Cheers, Stephan