From: Drew Adams <drew.adams@oracle.com>
To: Heime <heimeborgia@protonmail.com>, Emanuel Berg <incal@dataswamp.org>
Cc: "help-gnu-emacs@gnu.org" <help-gnu-emacs@gnu.org>
Subject: RE: [External] : Re: cond construct for situation when a variable is t
Date: Tue, 22 Aug 2023 16:10:10 +0000 [thread overview]
Message-ID: <SJ0PR10MB5488673CF8981ADD130511A4F31FA@SJ0PR10MB5488.namprd10.prod.outlook.com> (raw)
In-Reply-To: <fGnRvqkdkFuisqCMc-Q6vHXCCGPfK9HO7K7-95Y_61DGLU3MvVpo7kmPGzhugkdO_ThXbinJqUeE98gC7JxCtDPWgIccs4hGCkPznUUoU4Y=@protonmail.com>
> > You can, you totally can. Just don't `setq' t to anything ;)
>
> 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".
next prev parent reply other threads:[~2023-08-22 16:10 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 ` Drew Adams [this message]
2023-08-22 19:31 ` [External] : " Emanuel Berg
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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