]> Here's a puzzle for the Caml breeders: # type poly = { f : 'a . 'a -> 'a };; type poly = { f : 'a. 'a -> 'a; } # let id x = x;; val id : 'a -> 'a = <fun> # let foo = { f = id };; val foo : poly = {f = <fun>} # let rec id x = x and foo = { f = id } ;; This field value has type 'a -> 'a which is less general than 'b. 'b -> 'b Why is this last recursive definition unacceptable? Alex ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners