From: Emanuel Berg <incal@dataswamp.org>
To: help-gnu-emacs@gnu.org
Subject: Re: [External] : Re: cond construct for situation when a variable is t
Date: Tue, 22 Aug 2023 21:31:51 +0200 [thread overview]
Message-ID: <874jkq98m0.fsf@dataswamp.org> (raw)
In-Reply-To: SJ0PR10MB5488673CF8981ADD130511A4F31FA@SJ0PR10MB5488.namprd10.prod.outlook.com
Drew Adams wrote:
>> Right, because one can set the letter t to something which
>> would then screw up the idea that t means
>> a truth condition.
>
> (setq t 42)
>
> Debugger entered--Lisp error: (setting-constant t)
> signal(setting-constant (t))
> (progn (signal 'setting-constant (list 't)))
> (progn (progn (signal 'setting-constant (list 't))))
> elisp--eval-last-sexp(nil)
> eval-last-sexp(nil)
> funcall-interactively(eval-last-sexp nil)
> command-execute(eval-last-sexp)
>
> And `t' is not a "letter" here; it's a _symbol_ whose name
> is "t".
Okay, so they don't allow that anymore. Good, I guess.
Or maybe I did it in another way than using `setq', I say this
because I remember it very well that suddenly nothing worked.
--
underground experts united
https://dataswamp.org/~incal
next prev parent reply other threads:[~2023-08-22 19:31 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-18 14:00 cond construct for situation when a variable is t Heime
2023-08-19 22:04 ` Emanuel Berg
2023-08-22 12:18 ` Heime
2023-08-22 16:10 ` [External] : " Drew Adams
2023-08-22 19:31 ` Emanuel Berg [this message]
2023-08-23 19:49 ` Drew Adams
2023-08-22 19:29 ` Emanuel Berg
2023-08-22 12:32 ` Heime
2023-08-22 16:17 ` [External] : " Drew Adams
2023-08-22 20:21 ` Heime
2023-08-22 21:07 ` Drew Adams
2023-08-19 22:43 ` Rudolf Adamkovič
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