all messages for Emacs-related lists mirrored at yhetil.org
 help / color / mirror / code / Atom feed
From: Eli Zaretskii <eliz@gnu.org>
To: Stefan Kangas <stefankangas@gmail.com>
Cc: acm@muc.de, monnier@iro.umontreal.ca, 59057@debbugs.gnu.org
Subject: bug#59057: Emacs 29. Byte compiler sometimes forgets about a defvar.
Date: Thu, 24 Nov 2022 21:33:24 +0200	[thread overview]
Message-ID: <83wn7kuozf.fsf@gnu.org> (raw)
In-Reply-To: <CADwFkm=z8STfz5abAUc-Y72z-cH_XwDxvKwi9qGWDnhTcxxOEw@mail.gmail.com> (message from Stefan Kangas on Thu, 24 Nov 2022 11:29:32 -0800)

> Cc: Alan Mackenzie <acm@muc.de>, 59057@debbugs.gnu.org
> From: Stefan Kangas <stefankangas@gmail.com>
> Date: Thu, 24 Nov 2022 11:29:32 -0800
> 
> 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?

It makes no sense to me to deprecate (defvar FOO).  There are only
disadvantages down that path (massive annoyance or breakage of third-party
code, if nothing else).  Please don't.





  reply	other threads:[~2022-11-24 19:33 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
2022-11-24 19:33             ` Eli Zaretskii [this message]
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=83wn7kuozf.fsf@gnu.org \
    --to=eliz@gnu.org \
    --cc=59057@debbugs.gnu.org \
    --cc=acm@muc.de \
    --cc=monnier@iro.umontreal.ca \
    --cc=stefankangas@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this external index

	https://git.savannah.gnu.org/cgit/emacs.git
	https://git.savannah.gnu.org/cgit/emacs/org-mode.git

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.