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

From: Dmitry Bufistov (dmitry_at_[hidden])
Date: 2006-03-09 06:53:27

Janusz Piwowarski wrote:
> 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.
> 
Yes, it is true. It just looks a litlle bit clumsy for me.
Thanks,
Dmitry