From: wojtek@power.com.pl (Wojtek Narczynski)
Subject: Re: What evil would happen?
Date: 15 Jul 2003 04:31:16 -0700
Date: 2003-07-15T11:31:16+00:00 [thread overview]
Message-ID: <5ad0dd8a.0307150331.673b7782@posting.google.com> (raw)
In-Reply-To: bf02o2$dno$1@shell.monmouth.com
ka@sorry.no.email (Kenneth Almquist) wrote in message news:<bf02o2$dno$1@shell.monmouth.com>...
> wojtek@power.com.pl (Wojtek Narczynski) wrote:
> > I feel like with SML like tagged union datatypes I'd be done long
> > ago... Is there an AI for this maybe?
>
> I'm not sure what the problem is here. In SML you can write
> things such as:
>
> datatype tree = Leaf of int
> | Tree of {
> value : int,
> left : tree,
> right : tree
> }
> | Empty
>
> In Ada, you achieve the same effect by writing:
>
> type Tree_Tag is (Leaf, General_Tree, Empty);
> type Tree(Tag : Tree_Tag);
> type Tree_Ptr is access Tree;
> type Tree(Tag : Tree_Tag) is record
> case Tag is
> when Leaf =>
> Leaf : Integer;
> when General_Tree =>
> Value : Integer;
> Left : Tree_Ptr;
> Right : Tree_Ptr;
> when Empty =>
> null;
> end case;
> end record;
>
Thanks for the example.
Regards,
Wojtek
next prev parent reply other threads:[~2003-07-15 11:31 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-11 19:51 What evil would happen? Wojtek Narczynski
2003-07-11 20:07 ` Hyman Rosen
2003-07-12 12:30 ` Wojtek Narczynski
2003-07-12 17:17 ` Martin Dowie
2003-07-13 1:46 ` Hyman Rosen
2003-07-13 15:29 ` Wojtek Narczynski
2003-07-11 20:08 ` chris.danx
2003-07-12 4:31 ` Nick Roberts
2003-07-12 12:26 ` Wojtek Narczynski
2003-07-12 12:39 ` Preben Randhol
2003-07-12 13:11 ` Larry Kilgallen
2003-07-12 13:22 ` Preben Randhol
2003-07-12 19:04 ` Larry Kilgallen
2003-07-14 8:43 ` Preben Randhol
2003-07-14 10:32 ` Larry Kilgallen
2003-07-14 11:05 ` Preben Randhol
2003-07-14 11:31 ` Larry Kilgallen
[not found] ` <slrnbh53ir.48d.Organization: LJK Software <zSeTW0M3CTPU@eisner.encompasserve.org>
2003-07-14 17:31 ` Wojtek Narczynski
2003-07-13 15:26 ` Wojtek Narczynski
2003-07-13 17:28 ` Chad R. Meiners
2003-07-13 22:35 ` Wojtek Narczynski
2003-07-14 0:06 ` Chad R. Meiners
2003-07-13 22:36 ` Wojtek Narczynski
2003-07-14 3:01 ` Hyman Rosen
2003-07-14 4:41 ` Chad R. Meiners
2003-07-14 23:32 ` [ot] languages & academia was " chris.danx
2003-07-14 9:09 ` Dmitry A. Kazakov
2003-07-14 17:44 ` Chad R. Meiners
2003-07-14 18:15 ` tmoran
2003-07-15 8:06 ` Dmitry A. Kazakov
2003-07-11 21:26 ` Robert I. Eachus
2003-07-12 12:38 ` Wojtek Narczynski
2003-07-16 0:07 ` Robert I. Eachus
2003-07-16 8:11 ` Preben Randhol
2003-07-14 18:52 ` Randy Brukardt
2003-07-14 20:12 ` Hyman Rosen
2003-07-15 2:32 ` Alexander Kopilovitch
2003-07-15 8:19 ` Wojtek Narczynski
2003-07-15 17:33 ` Randy Brukardt
2003-07-16 0:22 ` Robert I. Eachus
2003-07-16 8:36 ` Dmitry A. Kazakov
2003-07-15 5:16 ` Kenneth Almquist
2003-07-15 11:31 ` Wojtek Narczynski [this message]
2003-07-18 8:23 ` Wojtek Narczynski
2003-07-18 14:45 ` Hyman Rosen
2003-07-19 0:55 ` Robert I. Eachus
-- strict thread matches above, loose matches on Subject: below --
2003-07-11 23:04 Beard, Frank Randolph CIV
2003-07-12 12:46 ` Wojtek Narczynski
replies disabled
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox