From: Stefan Kangas <stefankangas@gmail.com>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Alan Mackenzie <acm@muc.de>, 59057@debbugs.gnu.org
Subject: bug#59057: Emacs 29. Byte compiler sometimes forgets about a defvar.
Date: Thu, 24 Nov 2022 11:29:32 -0800 [thread overview]
Message-ID: <CADwFkm=z8STfz5abAUc-Y72z-cH_XwDxvKwi9qGWDnhTcxxOEw@mail.gmail.com> (raw)
In-Reply-To: <jwvsfisqakd.fsf-monnier+emacs@gnu.org> (Stefan Monnier's message of "Wed, 09 Nov 2022 12:54:57 -0500")
Stefan Monnier <monnier@iro.umontreal.ca> writes:
>> The basic problem is that defvar is a dog's breakfast of a function. In
>> fact, it's two distinct functions sharing a name. These two functions
>> have little else to do with eachother.
>
> Yup.
>
>> And defvar appears to be the only function in Emacs where supplying nil
>> as an &optional argument has an effect different from omitting it. This
>> is bad for anybody trying to learn Emacs Lisp.
>
> Not the only one, sadly (`declare-function` comes to mind :-)), but yes,
> it's unusual.
I guess defvar will have to stay as it is. But would it make sense to
add a new `declare-variable' function, and then document the form
(defvar <foo>)
to be considered deprecated?
next prev parent reply other threads:[~2022-11-24 19:29 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-05 18:46 bug#59057: Emacs 29. Byte compiler sometimes forgets about a defvar Alan Mackenzie
2022-11-07 13:07 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-11-07 20:20 ` Alan Mackenzie
2022-11-07 21:29 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-11-08 11:01 ` Alan Mackenzie
2022-11-08 14:12 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-11-07 21:31 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-11-09 13:40 ` Alan Mackenzie
2022-11-09 17:54 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-11-24 19:29 ` Stefan Kangas [this message]
2022-11-24 19:33 ` Eli Zaretskii
2022-11-24 20:36 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-11-24 21:12 ` Stefan Kangas
2022-11-25 10:36 ` Alan Mackenzie
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