From: Matthias Koeppe <mkoeppe@mail.Math.Uni-Magdeburg.De>
Cc: "Lars J. Aas" <larsa@sim.no>, Keith Wright <kwright@gis.net>,
mvo@zagadka.ping.de, guile-user@gnu.org
Subject: Re: defining new character names?
Date: Tue, 27 Aug 2002 17:09:44 +0200 [thread overview]
Message-ID: <uw5wuqcibif.fsf@saturn.math.uni-magdeburg.de> (raw)
In-Reply-To: <20020821095422.GC23971@www> (rm@fabula.de's message of "Wed, 21 Aug 2002 11:54:22 +0200")
rm@fabula.de writes:
> On Wed, Aug 21, 2002 at 10:51:38AM +0200, Matthias Koeppe wrote:
>> If you want to create a named constant, you simply do
>>
>> (define error-message "Error")
>> (define scaled-pi 314159265)
>
> No. 'error-message' is not constant after that:
>
> (set! error-message 'moep?)
Don't do that then. (What was your point?)
A named constant simply is a variable that you promise not to change.
I proposed a DEFINE-CONSTANT special form that makes the promise more
explicit.
Regards,
--
Matthias Köppe -- http://www.math.uni-magdeburg.de/~mkoeppe
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next prev parent reply other threads:[~2002-08-27 15:09 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-19 10:07 defining new character names? Lars J. Aas
2002-08-19 23:36 ` Marius Vollmer
2002-08-20 3:40 ` Keith Wright
2002-08-21 4:01 ` Keith Wright
2002-08-21 8:12 ` Lars J. Aas
2002-08-21 8:43 ` rm
2002-08-21 8:51 ` Matthias Koeppe
2002-08-21 9:17 ` Lars J. Aas
2002-08-21 9:54 ` rm
2002-08-27 15:09 ` Matthias Koeppe [this message]
2002-09-01 16:24 ` Rob Browning
2002-09-01 16:49 ` Marius Vollmer
2002-08-20 8:20 ` Matthias Koeppe
2002-08-20 10:18 ` rm
2002-08-21 9:20 ` Matthias Koeppe
2002-08-21 10:00 ` rm
2002-08-21 18:01 ` Marius Vollmer
-- strict thread matches above, loose matches on Subject: below --
2002-08-21 15:24 Lynn Winebarger
2002-08-21 17:33 ` Keith Wright
2002-08-21 18:27 ` Lynn Winebarger
2002-08-21 19:06 ` rm
2002-08-21 19:47 ` Lynn Winebarger
2002-08-21 23:04 ` Keith Wright
2002-08-21 23:07 ` Keith Wright
2002-08-21 19:40 ` Marius Vollmer
2002-08-22 4:12 ` Keith Wright
2002-08-22 5:16 ` Lynn Winebarger
2002-08-22 7:42 ` rm
2002-08-22 8:39 ` Lynn Winebarger
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