Re: [Boost-users] Bug in BGL with num_vertices( filtered_graph )

From: Doug Gregor (dgregor_at_[hidden])
Date: 2004-12-20 10:41:30

On Dec 20, 2004, at 4:17 AM, Sebastian Weber wrote:

>> The filtered_graph docs for num_vertices say that it returns the 
>> number of vertices in the underlying graph, and has a footnote giving 
>> the rationale/explanation that I repeated here. What more information 
>> could we give here?
>
> Just found it in the docs. Sorry for my blindeness, but I thought of 
> the filtered_graph in terms of a regular graph (so no special 
> num_vertices behaviour). I learned the hard way :-(. Maybe this 
> exception of num_vertices should be mentioned in the description text 
> of filtered_graph along with the reasons you lined out.

I've added some text to the filtered_graph description stating this 
(with a link to the footnote), so hopefully others won't get tripped up 
by this in the future.

        Doug