Re: [Boost-users] [BGL] Why there is no special handler for "discover_source_vertex" event in BFS visitor?

From: Janusz Piwowarski (jpiw_at_[hidden])
Date: 2006-03-09 00:49:46

Dmitry wrote:
> Hi there!
> Current implementation calls
> vis.discover_vertex(s, g);
> at this point, the same function being called for all others
> discovered vertices. I have one small problem wich could be nicely
> solved with such special  handler and I believe that there are others
> when such handler could be usefull.
> Any suggestings why things is going exacly in this way?

You know the source vertex when you call bfs, don't you? Is it not enough? 
If not, you can use the simple boolean flag to determine whether the vertex 
is first or not.

-- 
Regards,
Janusz