From: Mark Wotton <mrak@cs.usyd.edu.au>
To: caml-list@inria.fr
Subject: Re: [Caml-list] [Q]: Co(ntra)variance and subtyping?
Date: Sun, 18 Nov 2001 01:55:59 +1100 (EST) [thread overview]
Message-ID: <Pine.LNX.4.21.0111180153540.27799-100000@hons.cs.usyd.edu.au> (raw)
In-Reply-To: <Pine.LNX.4.21.0111180112020.27799-100000@hons.cs.usyd.edu.au>
On Sun, 18 Nov 2001, Mark Wotton wrote:
> On Fri, 16 Nov 2001, Clemens Hintze wrote:
>
> > Two things I would like to ask you right now:
> >
> > - What does subtyping exactly mean in OCaml resp. functional
> > programming?
> > - What means covariance and contravariance of types and subtypes?
>
> Not being an Ocaml guru, I shan't attempt the first question.
> The second's pretty easy, though: covariance is the sane way of doing OO,
> and contravariance is bizarre. (Right, if there's any Eiffel devotees on
> here, I've just started a flamewar. :)
Of course, in a post talking about someone else's English, it's almost
inevitable that I'm going to get it wrong myself. s/there's/there are/g.
mrak
looking forward to the mistake in this one.
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next prev parent reply other threads:[~2001-11-17 14:56 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-16 19:37 Clemens Hintze
2001-11-17 14:18 ` Mark Wotton
2001-11-17 14:55 ` Mark Wotton [this message]
2001-11-17 17:50 ` [Caml-list] " Clemens Hintze
2001-11-17 23:17 ` Mark Wotton
2001-11-18 9:16 ` Clemens Hintze
2001-11-18 13:18 ` Alain Frisch
2001-11-19 9:54 ` Remi VANICAT
[not found] ` <9t7v4d$gij$1@qrnik.zagroda>
2001-11-18 11:57 ` Marcin 'Qrczak' Kowalczyk
2001-11-18 13:34 ` [Caml-list] " Andreas Rossberg
2001-11-18 21:22 ` Pixel
2001-11-19 0:33 ` Jacques Garrigue
2001-11-18 22:35 ` David Gurr
2001-11-19 7:24 ` [Caml-list] " Clemens Hintze
2001-11-19 12:03 ` Markus Mottl
2001-11-19 8:29 ` [Caml-list] " Xavier Leroy
2001-11-19 11:03 ` Alain Frisch
2001-11-20 9:58 ` Didier Remy
2001-11-19 11:14 ` Pixel
2001-11-18 22:30 ` [Caml-list] Re: variance, subtyping and monads... oh, my! james woodyatt
2001-11-19 8:11 ` Francois Pottier
2001-11-19 9:02 ` james woodyatt
2001-11-19 9:58 ` Markus Mottl
2001-11-19 20:47 ` james woodyatt
2001-11-19 12:56 ` Frank Atanassow
2001-11-19 10:39 ` Andreas Rossberg
2001-11-19 12:21 ` Markus Mottl
2001-11-19 13:43 ` [Caml-list] Kylix and OCaml Christophe Raffalli
2001-11-20 2:05 ` Vitaly Lugovsky
2001-11-20 8:51 ` Christophe Raffalli
2001-11-22 1:42 ` Vitaly Lugovsky
2001-11-20 10:00 ` Benjamin Monate
2001-11-20 10:24 ` [Caml-list] [Bug in an interface between C++ and OCAML due to some pointer encapsulation] Sylvain Kerjean
2001-11-20 12:14 ` [Caml-list] Kylix and OCaml Maxence Guesdon
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