class RGL::DFSVisitor

A DFSVisitor is needed by the {Graph#depth_first_search} and {Graph#depth_first_visit} methods of a graph. Besides the eventpoints of {GraphVisitor}, it provides an additional eventpoint start_vertex, which is called when a depth_first_search starts a new subtree of the depth first forest that is defined by the search.

@see DFSIterator