In the BGL documentation (challenge section, see http://www.boost.org/doc/libs/1_56_0/libs/graph/doc/challenge.html), a bullet point is:

"Explore the use of Algorithm Objects as an alternative to the current approach with visitors."

Do you have any links or explanations about the "Algorithm Objects"

concept? You can check this discussion: http://permalink.gmane.org/gmane.comp.lib.boost.devel/217196 Or this: http://permalink.gmane.org/gmane.comp.lib.boost.devel/233034 However it seems interest has waned, I implemented and shared an Algorithm Object version of Dijkstra's shortest paths, but got no reply here: http://lists.boost.org/Archives/boost/2014/04/212891.php

Thanks, Pierre Talbot

Best wishes, Alex