GNU bug report logs - #56739
29.0.50; `cl-psetq' and `cl-psetf' fail to recognize symbol macros

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Message #43 received at 56739 <at> debbugs.gnu.org (full text, mbox):

From: Gerd Möllmann <gerd.moellmann <at> gmail.com>
To: Wing Hei Chan <whmunkchan <at> outlook.com>
Cc: "56739 <at> debbugs.gnu.org" <56739 <at> debbugs.gnu.org>
Subject: Re: bug#56739: 29.0.50; `cl-psetq' and `cl-psetf' fail to recognize
 symbol macros
Date: Sat, 09 Sep 2023 11:24:43 +0200

Wing Hei Chan <whmunkchan <at> outlook.com> writes:

> Resending this message as I didn't send it to the thread.
>
>  > Afaik, *left-hand* side symbol macros are all handled correctly:
>  >
>  > - `setq' is handled by `cl-symbol-macrolet' itself;
>  > - `setf' expands symbol macros as needed;
>  > - `cl-setq' and `cl-setf' expand to `setf'.
>  >
>  > The original bug is about *right-hand* side symbol macros, namely that
>  > `cl-setq' and `cl-setf' can introduce an unsound optimization in such
>  > cases.  In fact, I'm not sure this optimization is needed anymore (see
>  > Stefan's comment).  The simplest way to fix the bug is to remove the
>  > optimization, but I'll leave the decision to more knowledgeable people.

Then I've possibly misunderstood what this is about, sorry.

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