From: Zheng Li <li@pps.jussieu.fr>
To: caml-list@inria.fr
Subject: Re: Why can't I call a function over a subclass?
Date: Fri, 05 Oct 2007 12:53:32 +0200 [thread overview]
Message-ID: <87ejg9oms3.fsf@pps.jussieu.fr> (raw)
In-Reply-To: <1191580233.6509.26.camel@Blefuscu>
David Teller <David.Teller@ens-lyon.org> writes:
> I agree with Luca that it's disconcerting.
> When r is a class, I would expect
> let f (x:r) (y:r) =...
This expression says f accept arguments of type [r], what you mean to say is: f
accept any arguments belong to [r]'s subtypes family. Then say it with
# let f (x:#r) (y:#r) = x#get_x = y#get_x
val f : #r -> #r -> bool = <fun>
--
Zheng Li
http://www.pps.jussieu.fr/~li
next prev parent reply other threads:[~2007-10-05 10:51 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
2007-10-05 10:30 ` David Teller
2007-10-05 10:53 ` Zheng Li [this message]
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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