From: Michael Heerdegen <michael_heerdegen@web.de>
To: Eli Zaretskii <eliz@gnu.org>
Cc: "Gerd Möllmann" <gerd.moellmann@gmail.com>, 65209@debbugs.gnu.org
Subject: bug#65209: 30.0.50; Unexpected behaviour of setq-local
Date: Sun, 13 Aug 2023 06:16:42 +0200 [thread overview]
Message-ID: <87r0o7r2z9.fsf@web.de> (raw)
In-Reply-To: <83edk9hm2y.fsf@gnu.org> (Eli Zaretskii's message of "Fri, 11 Aug 2023 14:09:41 +0300")
Eli Zaretskii <eliz@gnu.org> writes:
> > > #+begin_src emacs-lisp
> > > (progn
> > > (defvar my-var :default-value)
> > > (let ((my-var :let-value))
> > > (make-local-variable 'my-var)
> > > (setq my-var :buffer-local-new))
> > > (list my-var (local-variable-p 'my-var))) ;; (:buffer-local-new t)
> > > #+end_src
> > >
> > > `setq' sets the buffer local binding, not the global value the `let'
> > > binding refers to.
> I guess this bug can be closed, then? Or is there anything left to
> do?
After thinking more about it:
I could explain the behavior of Gerd's recipes using the manual, but it
doesn't explain the state in my above example _after_ the `let' has
been left.
The manual has a *Warning* section about mixing `let', buffer-local
variables, and changing the current buffer. But it doesn't explain what
happens in a single buffer when you `let'-bind a (declared) variable,
make it local inside the `let', and finish the `let'. Is the variable
still buffer-local afterwards, or does `let' remove the
buffer-localness? With other words, is leaving a `let' the same as a
`setq' to the remembered value, or is it more?
Do we answer that question somewhere? If not, I suggest to add that,
maybe as an example before the *Warning* section.
Michael.
next prev parent reply other threads:[~2023-08-13 4:16 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-10 13:50 bug#65209: 30.0.50; Unexpected behaviour of setq-local Gerd Möllmann
2023-08-10 14:00 ` Eli Zaretskii
2023-08-11 0:17 ` Michael Heerdegen
2023-08-11 4:56 ` Gerd Möllmann
2023-08-11 5:53 ` Michael Heerdegen
2023-08-11 8:17 ` Gerd Möllmann
2023-08-11 11:09 ` Eli Zaretskii
2023-08-11 11:34 ` Gerd Möllmann
2023-08-11 11:36 ` Eli Zaretskii
2023-08-13 4:16 ` Michael Heerdegen [this message]
2023-08-13 5:53 ` Eli Zaretskii
2023-08-11 14:58 ` Drew Adams
2023-08-13 16:43 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-13 19:51 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-14 3:24 ` Michael Heerdegen
2023-08-14 4:05 ` Gerd Möllmann
2023-08-18 23:24 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-20 4:43 ` Michael Heerdegen
2023-08-20 6:49 ` Eli Zaretskii
2023-08-22 3:09 ` Michael Heerdegen
2023-08-22 10:56 ` Eli Zaretskii
2023-08-23 3:47 ` Michael Heerdegen
2023-08-23 11:39 ` Eli Zaretskii
2023-08-23 12:51 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-24 1:06 ` Michael Heerdegen
2023-08-24 5:22 ` Eli Zaretskii
2023-08-26 2:09 ` Michael Heerdegen
2023-08-26 6:02 ` Eli Zaretskii
2023-08-26 14:25 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-27 4:19 ` Michael Heerdegen
2023-08-24 3:31 ` Michael Heerdegen
2023-08-24 5:35 ` Eli Zaretskii
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