I can't seem to wrap my head around implementing a BFS Visitor and color
map required by the breadth_first_visitor function.

I want to use it to find connected parts of a graph and after the
algorithm has run I plan to clear all white nodes.

If anyone could provide me with a code example or link to one
implementing really only default behaviour I'd appreciate it immensely.

Which part is causing trouble: the implementation of the visitor or the creation of a color map? Creating exterior properties can be a bit tricky, and the method used depends entirely on the type of your graph.

Post code usually results in better answers.
 
Andrew Sutton
andrew.n.sutton@gmail.com