This page: http://www.boost.org/doc/libs/1_48_0/libs/graph/doc/connected_components.htm... says "The connected_components() functions compute the connected components of an _undirected_ graph using a DFS-based approach." [emphasis mine] Looking here: http://www.boost.org/doc/libs/1_48_0/boost/graph/connected_components.hpp I see somewhat some unexpected things. o Only the first variant asserts that the graph is undirected, in the second variant the assert is commented out - why is that? o Both variants use depth_first_search() and not undirected_dfs(), which would seem to be more logical for the undirected case - why? Despite the above questions I actually want to use connected_components() [and not strong_components()] for a directed graph. Should that be possible? Does it make sense? Thank you! -- Andriy Gapon