From: Niklas Holsti <niklas.holsti@tidorum.invalid>
Subject: Re: syntaxic exploration
Date: Mon, 25 Dec 2017 20:27:25 +0200
Date: 2017-12-25T20:27:25+02:00 [thread overview]
Message-ID: <facu8dFhe9fU1@mid.individual.net> (raw)
In-Reply-To: <7c026086-1eee-4c65-9972-6d1f99a709ae@googlegroups.com>
On 17-12-25 16:42 , Mehdi Saada wrote:
> More importantly, why would anyone use an enumeration
> type with only one value ? I don't get it.
It's a limit case that comes up fairly often when one creates generic
software components parametrized by enumeration types, or other discrete
types. (Sometimes one would like to use such a component with an
enumeration type that has _no_ elements, but that seldom works...)
Null record types (with no components) and empty arrays are similar
limit cases. The number zero and the empty set are others. It is
important that language has sensible and consistent rules for these
limits (for example, a loop over an empty array should execute the loop
body zero times) so that generic code can be written without always
handling these limit cases separately.
--
Niklas Holsti
Tidorum Ltd
niklas holsti tidorum fi
. @ .
next prev parent reply other threads:[~2017-12-25 18:27 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-20 17:28 syntaxic exploration Mehdi Saada
2017-12-20 17:32 ` Mehdi Saada
2017-12-20 20:08 ` Niklas Holsti
2017-12-20 22:18 ` Mehdi Saada
2017-12-20 22:45 ` Mehdi Saada
2017-12-21 7:24 ` Randy Brukardt
2017-12-21 7:44 ` Niklas Holsti
2017-12-21 7:21 ` Randy Brukardt
2017-12-21 16:24 ` Jeffrey R. Carter
2017-12-22 5:01 ` Robert Eachus
2017-12-22 21:15 ` Simon Clubley
2017-12-22 22:11 ` Niklas Holsti
2017-12-22 22:51 ` Dmitry A. Kazakov
2017-12-23 7:15 ` Niklas Holsti
2017-12-23 16:23 ` Jeffrey R. Carter
2017-12-24 3:37 ` Robert Eachus
2017-12-24 13:39 ` Niklas Holsti
2017-12-24 13:32 ` Niklas Holsti
2017-12-25 13:40 ` Jeffrey R. Carter
2017-12-25 14:42 ` Mehdi Saada
2017-12-25 17:03 ` Dmitry A. Kazakov
2017-12-25 18:27 ` Niklas Holsti [this message]
2017-12-25 20:12 ` Jacob Sparre Andersen
2017-12-20 20:05 ` Niklas Holsti
2017-12-20 22:48 ` Mehdi Saada
2017-12-20 23:39 ` Mehdi Saada
2017-12-21 0:35 ` Mehdi Saada
2017-12-21 7:18 ` Randy Brukardt
2017-12-21 19:23 ` G. B.
2017-12-21 23:46 ` bj.mooremr
2017-12-22 23:45 ` Randy Brukardt
2017-12-22 13:31 ` Mehdi Saada
2017-12-22 18:00 ` Mehdi Saada
2017-12-22 18:27 ` Niklas Holsti
2017-12-22 20:25 ` Mehdi Saada
2017-12-22 22:33 ` Niklas Holsti
2017-12-23 1:47 ` Mehdi Saada
2017-12-23 7:17 ` Niklas Holsti
2017-12-23 11:23 ` Mehdi Saada
2017-12-23 11:39 ` Mehdi Saada
2017-12-23 12:09 ` Niklas Holsti
2017-12-23 12:12 ` Mehdi Saada
2017-12-23 12:16 ` Mehdi Saada
2017-12-23 13:04 ` Niklas Holsti
2017-12-23 14:02 ` Mehdi Saada
2017-12-23 14:46 ` Mehdi Saada
2017-12-23 15:03 ` Mehdi Saada
2017-12-23 22:11 ` Niklas Holsti
2017-12-24 0:55 ` Mehdi Saada
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