From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Michael Heerdegen <michael_heerdegen@web.de>
Cc: 56739@debbugs.gnu.org, Wing Hei Chan <whmunkchan@outlook.com>
Subject: bug#56739: 29.0.50; `cl-psetq' and `cl-psetf' fail to recognize symbol macros
Date: Mon, 05 Sep 2022 22:22:28 -0400 [thread overview]
Message-ID: <jwv4jxls0qg.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <87y1w6xjmg.fsf@web.de> (Michael Heerdegen's message of "Wed, 03 Aug 2022 02:20:55 +0200")
> - (let ((p args) (simple t) (vars nil))
> + (let ((p args) (simple t) (vars nil)
> + (smacros (alist-get :cl-symbol-macros macroexpand-all-environment)))
> (while p
> - (if (or (not (symbolp (car p))) (cl--expr-depends-p (nth 1 p) vars))
> - (setq simple nil))
> - (if (memq (car p) vars)
> - (error "Destination duplicated in psetf: %s" (car p)))
> + (when (or (not (symbolp (car p)))
> + (assq (car p) smacros)
This looks like a safe way to make it work when the place is
a symbol macro.
> + (and (symbolp (nth 1 p))
> + (assq (nth 1 p) smacros))
> + (cl--expr-depends-p (nth 1 p) vars))
But this doesn't look strong enough; if (nth 1 p) is (+ c c) where `c`
is a symbol macro the same problem will appear. So the test needs to be
pushed into `cl--expr-depends-p` (probably into `cl--safe-expr-p` where
it will fix other related problems elsewhere).
Stefan
next prev parent reply other threads:[~2022-09-06 2:22 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-24 12:12 bug#56739: 29.0.50; `cl-psetq' and `cl-psetf' fail to recognize symbol macros Wing Hei Chan
2022-08-02 2:41 ` Michael Heerdegen
2022-08-02 23:59 ` Michael Heerdegen
2022-08-03 0:20 ` Michael Heerdegen
2022-09-05 19:14 ` Lars Ingebrigtsen
2022-09-06 1:29 ` Michael Heerdegen
2022-09-06 2:22 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2023-09-07 18:31 ` Stefan Kangas
2023-09-08 3:07 ` Michael Heerdegen
2023-09-09 6:12 ` Michael Heerdegen
2023-09-09 7:08 ` Gerd Möllmann
[not found] ` <f49326d6-85e2-4fed-83ae-815a82cefe30@outlook.com>
2023-09-09 8:03 ` Wing Hei Chan
2023-09-09 9:24 ` Gerd Möllmann
2023-09-09 15:42 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-09-09 16:33 ` Gerd Möllmann
2022-09-06 2:29 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
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