]> From: Stefano Zacchiroli <zack@bononia.it> > It seems to me that the "%identity" feature, as in > > external unsafe_cast : 'a obj -> 'b obj = "%identity" > > is undocumented. Am I wrong? If not is there any particular reason for > so? According to http://caml.inria.fr/archives/200208/msg00034.html is > not meant to be used by the end user, but if it's better than Obj.magic > and used by lablgtk I see no reason to not mention it in the > "Interfacing C with Objective Caml" chapter of the OCaml documentation. > Maybe with a huge disclaimer ... It is equivalent to Obj.magic, which uses the same external. The only interest is that you can choose to give it a type more restrictive than Obj.magic, while still being an external. This way %identity completely disappears during compilation. I suppose that as Obj.magic is not documented, this is not documented either. Jacques Garrigue ------------------- 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