From: Brian Hurt <bhurt@spnz.org>
To: Benjamin Geer <ben@socialtools.net>
Cc: <caml-list@inria.fr>
Subject: Re: [Caml-list] does class polymorphism need to be so complicated?
Date: Wed, 20 Aug 2003 11:05:35 -0500 (CDT) [thread overview]
Message-ID: <Pine.LNX.4.33.0308201100130.2616-100000@eagle.ancor.com> (raw)
In-Reply-To: <3F4396F6.1010404@socialtools.net>
On Wed, 20 Aug 2003, Benjamin Geer wrote:
> class printer =
> object
> method print (obj : printable) = obj#print()
> end ;;
Instead of declaring obj to be printable, why not just declare that it has
a function print? Like:
class printer =
object
method print (obj: <print: unit->unit>) = obj#print ();
end;;
This removes the need for a coercion, as it gets around the need to
upcast.
Brian
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next prev parent reply other threads:[~2003-08-20 16:05 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-20 15:42 Benjamin Geer
2003-08-20 16:05 ` Brian Hurt [this message]
2003-08-20 16:19 ` Richard Jones
2003-08-20 16:25 ` Benjamin Geer
2003-08-20 17:09 ` brogoff
2003-08-20 17:25 ` Jacques Carette
2003-08-20 23:34 ` Jacques Garrigue
2003-08-21 13:27 ` Jacques Carette
2003-08-20 18:19 ` Benjamin Geer
2003-08-20 20:39 ` brogoff
2003-08-20 21:04 ` Benjamin Geer
2003-08-21 0:28 ` Jacques Garrigue
2003-08-21 8:17 ` Benjamin Geer
2003-08-21 8:58 ` Jacques Garrigue
2003-08-21 9:38 ` Benjamin Geer
2003-08-21 11:44 ` Remi Vanicat
2003-08-21 13:11 ` Richard Jones
2003-08-21 16:41 ` Remi Vanicat
2003-08-21 18:04 ` brogoff
2003-08-21 20:20 ` Benjamin Geer
2003-08-21 23:35 ` Benjamin Geer
2003-08-22 3:59 ` Jacques Garrigue
2003-08-22 7:12 ` Benjamin Geer
2003-08-21 13:38 ` Benjamin Geer
2003-08-21 0:58 ` brogoff
2003-08-20 23:40 ` Benjamin Geer
2003-08-21 1:29 ` Jacques Garrigue
2003-08-21 9:19 ` Benjamin Geer
2003-08-21 18:44 ` Chris Clearwater
2003-08-20 20:43 ` Issac Trotts
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