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[Caml-list] does class polymorphism need to be so complicated?
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| Date: | -- (:) |
| From: | Richard Jones <rich@a...> |
| Subject: | Re: [Caml-list] does class polymorphism need to be so complicated? |
On Thu, Aug 21, 2003 at 01:44:23PM +0200, Remi Vanicat wrote: > Benjamin Geer <ben@socialtools.net> writes: > > class type virtual printer = object > > method virtual print : #printable -> unit > > end ;; > > > > class type virtual talker = object > > method virtual talk : #printable -> unit > > end ;; > > > > class my_printer_talker () = object (self : #printer; #talker) > > method print obj = (* ... *) > > method talk obj = (* ... *) > > end ;; > > well this work : > > class my_printer_talker () = object (self : 's) > constraint 's = #printer > constraint 's = #talker > method print obj = (* ... *) > method talk obj = (* ... *) > end ;; Is there a way to add extra methods to my_printer_talker? Rich. -- Richard Jones. http://www.annexia.org/ http://freshmeat.net/users/rwmj Merjis Ltd. http://www.merjis.com/ - all your business data are belong to you. 'There is a joke about American engineers and French engineers. The American team brings a prototype to the French team. The French team's response is: "Well, it works fine in practice; but how will it hold up in theory?"' ------------------- 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