From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (from majordomo@localhost) by pauillac.inria.fr (8.7.6/8.7.3) id LAA00958; Tue, 21 Sep 2004 11:30:00 +0200 (MET DST) X-Authentication-Warning: pauillac.inria.fr: majordomo set sender to owner-caml-list@pauillac.inria.fr using -f Received: from nez-perce.inria.fr (nez-perce.inria.fr [192.93.2.78]) by pauillac.inria.fr (8.7.6/8.7.3) with ESMTP id LAA02062 for ; Tue, 21 Sep 2004 11:29:59 +0200 (MET DST) Received: from smtp1.adl2.internode.on.net (smtp1.adl2.internode.on.net [203.16.214.181]) by nez-perce.inria.fr (8.13.0/8.13.0) with ESMTP id i8L9Trl8021834 for ; Tue, 21 Sep 2004 11:29:54 +0200 Received: from [192.168.1.200] (ppp202-133.lns1.syd3.internode.on.net [203.122.202.133]) by smtp1.adl2.internode.on.net (8.12.9/8.12.9) with ESMTP id i8L9TZ4Y062992; Tue, 21 Sep 2004 18:59:46 +0930 (CST) Subject: Re: [Caml-list] Re: OCAML Downcasting? From: skaller Reply-To: skaller@users.sourceforge.net To: Jacques GARRIGUE Cc: Damien.Pous@ens-lyon.fr, caml-list In-Reply-To: <20040921.181531.71542839.garrigue@kurims.kyoto-u.ac.jp> References: <20040921.170339.118021840.garrigue@kurims.kyoto-u.ac.jp> <20040921104306.0e472a0e@localhost.localdomain> <20040921.181531.71542839.garrigue@kurims.kyoto-u.ac.jp> Content-Type: text/plain Message-Id: <1095758974.2580.859.camel@pelican.wigram> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.2 (1.2.2-4) Date: 21 Sep 2004 19:29:35 +1000 Content-Transfer-Encoding: 7bit X-Miltered: at nez-perce with ID 414FF491.000 by Joe's j-chkmail (http://j-chkmail.ensmp.fr)! X-Loop: caml-list@inria.fr X-Spam: no; 0.00; caml-list:01 downcasting:01 sourceforge:01 2004:99 jacques:01 widget:01 prerr:01 endline:01 9660:01 glebe:01 ocaml:01 inherit:01 variants:01 garrigue:01 nsw:01 Sender: owner-caml-list@pauillac.inria.fr Precedence: bulk On Tue, 2004-09-21 at 19:15, Jacques GARRIGUE wrote: > class ['a] button = object (self) > inherit ['a] widget > method raw = `Button (self :> 'a button) > method press = prerr_endline "pressed" > end > Without the self-cast, you cannot extend any class. Is that an issue with classes or polymorphic variants? -- John Skaller, mailto:skaller@users.sf.net voice: 061-2-9660-0850, snail: PO BOX 401 Glebe NSW 2037 Australia Checkout the Felix programming language http://felix.sf.net ------------------- 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