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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=slrnhtp24f.bpc.sylvain@gallu.homelinux.org \
--to=sylvain@le-gall.net \
--cc=caml-list@inria.fr \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox