From: Richard Stallman <rms@gnu.org>
To: Phil Sainty <psainty@orcon.net.nz>
Cc: 52290@debbugs.gnu.org
Subject: bug#52290: 28.0.90; Undocumented generalized variables
Date: Sun, 05 Dec 2021 23:33:08 -0500 [thread overview]
Message-ID: <E1mu5ga-0007hM-Qy@fencepost.gnu.org> (raw)
In-Reply-To: <5d87e4ab47875790076e932351fe8f25@webmail.orcon.net.nz> (message from Phil Sainty on Sun, 05 Dec 2021 14:25:54 +1300)
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I think people have extended setf in questionable ways,
allowing arithmetic and comparisons in the first argument.
I think I understand what (setq (logand x 7) NNN) does, but I think it
pushes the meaning of setf in a way that we should refrain from.
You could equally well define (setq (+ x 5) NNN), but why support
either of them?
What about (setq (+ x y) NNN) -- should that set x, or y?
Or both? It could do (setq x 0 y NNN), or (setq x NNN y 0),
or various other things.
I don't think that eq in the first argument is coherent at all.
--
Dr Richard Stallman (https://stallman.org)
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)
prev parent reply other threads:[~2021-12-06 4:33 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-05 1:25 bug#52290: 28.0.90; Undocumented generalized variables Phil Sainty
2021-12-05 1:35 ` Lars Ingebrigtsen
2021-12-05 1:55 ` Michael Heerdegen
2021-12-05 2:00 ` Lars Ingebrigtsen
2021-12-05 2:25 ` Michael Heerdegen
2021-12-05 2:52 ` Lars Ingebrigtsen
2021-12-05 16:17 ` Michael Heerdegen
2021-12-05 20:43 ` Lars Ingebrigtsen
2021-12-05 2:09 ` Phil Sainty
2021-12-05 2:46 ` Lars Ingebrigtsen
2022-08-21 22:36 ` Lars Ingebrigtsen
2022-08-23 0:07 ` Michael Heerdegen
2022-08-23 10:41 ` Lars Ingebrigtsen
2022-08-31 2:10 ` Michael Heerdegen
2022-08-31 9:58 ` Lars Ingebrigtsen
2022-10-04 11:58 ` Lars Ingebrigtsen
2021-12-06 4:33 ` Richard Stallman [this message]
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