From: Sylvain Le Gall <sylvain@le-gall.net>
To: caml-list@inria.fr
Subject: Re: Subtyping structurally-equivalent records, or something like it?
Date: Sat, 1 May 2010 20:01:19 +0000 (UTC) [thread overview]
Message-ID: <slrnhtp24f.bpc.sylvain@gallu.homelinux.org> (raw)
In-Reply-To: <602616.65342.qm@web111501.mail.gq1.yahoo.com>
On 01-05-2010, Dario Teixeira <darioteixeira@yahoo.com> wrote:
> Hi,
>
>> type kinematic = { lin: Vec.t; ang: Vec.t }
>>
>> Which I've been using to represent a medley of physical attributes (force, > momentum, velocity, etc.).
>
> I second Stéphane's suggestion of using phantom types; moreover,
> I recommend you read an article that discusses them to some detail
> and covers their use for precisely this sort of problem:
> http://camltastic.blogspot.com/2008/05/phantom-types.html
>
I really like the use of private type abbreviation for phantom type:
http://ocaml.janestreet.com/?q=node/77
Regards,
Sylvain Le Gall
next prev parent reply other threads:[~2010-05-01 20:01 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-01 19:55 [Caml-list] " Dario Teixeira
2010-05-01 20:01 ` Sylvain Le Gall [this message]
2010-05-04 10:33 ` [Caml-list] " AUGER Cédric
[not found] ` <4429.86797211251$1272970133@news.gmane.org>
2010-05-04 11:53 ` Sylvain Le Gall
2010-05-04 12:47 ` [Caml-list] " rossberg
2010-05-04 13:42 ` Sylvain Le Gall
2010-05-04 15:18 ` [Caml-list] " Fabrice Le Fessant
2010-05-05 9:31 ` Goswin von Brederlow
2010-05-05 12:12 ` rossberg
2010-05-05 16:46 ` Goswin von Brederlow
2010-05-04 13:37 ` Edgar Friendly
2010-05-05 9:33 ` Goswin von Brederlow
2010-05-05 11:10 ` Yaron Minsky
-- strict thread matches above, loose matches on Subject: below --
2010-05-01 16:04 Anthony Tavener
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