From: David Brown <caml-list@davidb.org>
To: Martin Jambon <martin_jambon@emailuser.net>
Cc: Jon Harrop <jdh30@cam.ac.uk>, caml-list@inria.fr
Subject: Re: [Caml-list] Functors
Date: Sun, 2 May 2004 10:18:12 -0700 [thread overview]
Message-ID: <20040502171812.GA25467@davidb.org> (raw)
In-Reply-To: <Pine.LNX.4.44.0405021727120.1794-100000@localhost>
On Sun, May 02, 2004 at 06:24:15PM +0800, Martin Jambon wrote:
> With my words: I understand functors as a way to parametrize a type with a
> value.
> They allow you to detect inconsistencies at compile time (e.g. 2 sets
> parametrized with different "compare" functions).
> Without functors, as far as I know, you can only test inconsistencies at
> run time (e.g. by putting all the parameters in a record an check physical
> equality of the records).
Unless the compare function is only an argument of the set creation
routine, and the value is part of the set itself. There might be
performance issues with an extra field, though.
Dave
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prev parent reply other threads:[~2004-05-02 17:18 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-02 9:12 Jon Harrop
2004-05-02 10:24 ` Martin Jambon
2004-05-02 13:34 ` Jon Harrop
2004-05-02 14:12 ` skaller
2004-05-02 16:49 ` Jon Harrop
2004-05-03 0:20 ` skaller
2004-05-03 14:43 ` Jacques Carette
2004-05-03 16:09 ` Alain.Frisch
2004-05-03 18:53 ` Jacques Carette
2004-05-03 19:17 ` [Caml-list] Mathematica Jon Harrop
2004-05-03 22:51 ` [Caml-list] Functors Alain.Frisch
2004-05-03 16:02 ` Julien Signoles
2004-05-03 18:41 ` Jon Harrop
2004-05-04 7:25 ` Jean-Christophe Filliatre
2004-05-05 8:15 ` Julien Signoles
2004-05-05 20:41 ` brogoff
2004-05-06 11:16 ` Jon Harrop
2004-05-06 20:23 ` Alain.Frisch
2004-05-06 18:26 ` Olivier Grisel
2004-05-06 12:26 ` Julien Signoles
2004-05-06 16:35 ` brogoff
2004-05-02 17:18 ` David Brown [this message]
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