[Boost-users] [BGL] - Undocumented Predicates for filtered_graph

In filtered_graph.hpp there appear to be a number of predefined predicates for general use (they are no in the detail namespace). One of them that I'd like to use is is_in_subset, but it appears that set_contains is not defined anywhere, not even for the most common case (std::set). Shouldn't Boost provide something like template bool set_contains(const std::set &s, const E &e) { return s.find(e) != s.end(); } and vice-versa for is_not_in_subset so that users don't have to open up the boost namespace and define it themselves? Thanks, --Michael Fawcett