when we hacked boost::*_ptr to do this, we used an environment variable to turn on the types we wanted traced. there would have no point in tracing every type t

when we hacked boost::*_ptr to do this, we used an environment variable to turn on the types we wanted traced. there would have no point in tracing every type that was managed with smart pointers, so there has to be at least 1 line of code modification just to identify what you wanted traced.