From: Christophe Raffalli <christophe.raffalli@univ-savoie.fr>
To: Vincent Aravantinos <vincent.aravantinos@yahoo.fr>
Cc: Luca de Alfaro <luca@dealfaro.org>,
Inria Ocaml Mailing List <caml-list@inria.fr>
Subject: Re: [Caml-list] Why can't I call a function over a subclass?
Date: Fri, 05 Oct 2007 13:47:29 +0200 [thread overview]
Message-ID: <47062451.4030600@univ-savoie.fr> (raw)
In-Reply-To: <A5C24FBB-AF67-412D-A7C5-578E68AEAB5D@yahoo.fr>
[-- Attachment #1: Type: text/plain, Size: 803 bytes --]
The problem is that OCaml type-checker is unification based instead of subtyping-constraint based
and therefore require (useless) type cast in some place (with variant and objects) ... This is why
you get unnatural behaviour of the type-checker with oo and variant in OCaml ...
--
Christophe Raffalli
Universite de Savoie
Batiment Le Chablais, bureau 21
73376 Le Bourget-du-Lac Cedex
tel: (33) 4 79 75 81 03
fax: (33) 4 79 75 87 42
mail: Christophe.Raffalli@univ-savoie.fr
www: http://www.lama.univ-savoie.fr/~RAFFALLI
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next prev parent reply other threads:[~2007-10-05 11:47 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-05 7:48 Luca de Alfaro
2007-10-05 8:01 ` [Caml-list] " Florian Hars
2007-10-05 8:08 ` Luca de Alfaro
2007-10-05 8:08 ` Fwd: " Luca de Alfaro
2007-10-05 11:08 ` Vincent Aravantinos
2007-10-05 11:47 ` Christophe Raffalli [this message]
2007-10-05 10:30 ` David Teller
2007-10-05 10:53 ` Zheng Li
2007-10-05 14:02 ` [Caml-list] " David Teller
2007-10-05 14:59 ` Luca de Alfaro
2007-10-05 15:12 ` Luca de Alfaro
[not found] ` <20071005152130.M41697@cs.unm.edu>
2007-10-05 15:49 ` Luca de Alfaro
2007-10-05 16:34 ` Edgar Friendly
2007-10-05 17:39 ` Luca de Alfaro
2007-10-05 17:49 ` Martin Jambon
[not found] ` <28fa90930710052153k2128bb63m5132455868eb2008@mail.gmail.com>
2007-10-07 22:19 ` Martin Jambon
2007-10-07 22:57 ` Classes and polymorphism (Re: [Caml-list] Re: Why can't I call a function over a subclass?) Martin Jambon
2007-10-05 19:48 ` Why can't I call a function over a subclass? Zheng Li
2007-10-06 1:49 ` [Caml-list] " Jake Donham
2007-10-09 4:18 ` Jacques Garrigue
2007-10-05 8:07 ` [Caml-list] " Pietro Abate
2007-10-05 10:55 ` Andrej Bauer
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