16:13:14pjbAnd yes, you must implement the various *print-…* semantics.
16:13:51pjbNow, nothing prevents you to define your own generic function.
16:14:25pjb(defgeneric my-print (object stream) (:method (object stream) (print object stream))) and then add methods at will.
16:15:41jmercourisand if I don't implement the print semantics?
16:17:55selwyn" If these rules are not obeyed, the results are undefined. "
16:22:10selwynin particular, not following the prescriptions regarding *print-circle* could lead to an otherwise unexpected unbounded amount of output to the printer which could, for example, break a REPL session
16:30:10selwynno problem. well, actually i am not so sure about my most recent argument. but avoiding undefined behaviour is certainly reason enough to follow the rules.