From: Michael Vanier <mvanier@cs.caltech.edu>
To: skaller@users.sourceforge.net
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] extensible records again
Date: Sun, 21 Mar 2004 21:54:30 -0800 (PST) [thread overview]
Message-ID: <20040322055430.A45C89BBA2@orchestra.cs.caltech.edu> (raw)
In-Reply-To: <1079926276.3165.49.camel@pelican.wigram> (message from skaller on 22 Mar 2004 14:31:16 +1100)
> From: skaller <skaller@users.sourceforge.net>
> Date: 22 Mar 2004 14:31:16 +1100
>
> On Mon, 2004-03-22 at 09:34, Michael Vanier wrote:
>
> > If I understand you correctly, then you're arguing that *all* my "core
> > types" should be implemented using polymorphic variants.
>
> I use Polymorphic Variants almost exclusively in Felix.
> They're more flexible but also give nastier error messages.
>
> The main downside is that to make covariant subtyping
> you need to use fixpoints, which is fine for a single
> parameter but unworkable for a more complex term
> structure.
Forgive my ignorance, but what do you mean by this?
Mike
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next prev parent reply other threads:[~2004-03-22 5:54 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-21 6:21 Michael Vanier
2004-03-21 8:08 ` Oleg Trott
2004-03-21 8:40 ` Michael Vanier
2004-03-21 16:10 ` Oleg Trott
2004-03-21 17:06 ` skaller
2004-03-21 17:36 ` Oleg Trott
2004-03-22 3:19 ` skaller
2004-03-22 7:49 ` Ville-Pertti Keinonen
2004-03-22 9:32 ` Oleg Trott
2004-03-22 10:25 ` Ville-Pertti Keinonen
2004-03-21 22:35 ` Michael Vanier
2004-03-22 3:39 ` skaller
2004-03-21 22:34 ` Michael Vanier
2004-03-22 3:31 ` skaller
2004-03-22 5:54 ` Michael Vanier [this message]
2004-03-23 19:14 ` skaller
2004-03-24 1:41 ` Jacques Garrigue
2004-03-24 8:44 ` Julien Signoles
2004-03-24 10:04 ` Jacques Garrigue
2004-03-21 8:53 ` Martin Jambon
2004-03-21 9:22 ` Michael Vanier
2004-03-21 17:00 ` skaller
2004-03-22 8:13 ` Achim Blumensath
2004-03-23 2:14 ` Michael Vanier
2004-03-23 7:25 ` Achim Blumensath
2004-03-31 10:05 ` Marcin 'Qrczak' Kowalczyk
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