From: Lars Ingebrigtsen <larsi@gnus.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Phil Sainty <psainty@orcon.net.nz>,
Stefan Kangas <stefan@marxist.se>,
58513@debbugs.gnu.org
Subject: bug#58513: describe-function should say that defconst variables are constant
Date: Fri, 14 Oct 2022 16:25:30 +0200 [thread overview]
Message-ID: <87sfjq7a91.fsf@gnus.org> (raw)
In-Reply-To: <jwvo7uepmag.fsf-monnier+emacs@gnu.org> (Stefan Monnier's message of "Fri, 14 Oct 2022 09:34:00 -0400")
Stefan Monnier <monnier@iro.umontreal.ca> writes:
> FWIW, my own local Emacs has `defconst` create actually
> constant variables by adding a `SYMBOL_DEFCONST` to `enum
> symbol_trapped_write`. Admittedly I didn't make them really constant:
> I allow a subsequent `defconst` to change the value set by a previous
> `defconst`, but `setq` signals an error just like it does if you try to
> `setq` on `enable-multibyte-characters` or on `nil`.
Hm... do you know if there's a performance impact from doing this?
next prev parent reply other threads:[~2022-10-14 14:25 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-14 12:04 bug#58513: describe-function should say that defconst variables are constant Stefan Kangas
2022-10-14 12:23 ` Lars Ingebrigtsen
2022-10-14 12:35 ` Phil Sainty
2022-10-14 12:40 ` Lars Ingebrigtsen
2022-10-14 13:03 ` Stefan Kangas
2022-10-14 13:07 ` Lars Ingebrigtsen
2022-10-14 13:34 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-10-14 14:25 ` Lars Ingebrigtsen [this message]
2022-10-14 16:44 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-10-15 10:04 ` Lars Ingebrigtsen
2022-10-16 20:51 ` Richard Stallman
2022-10-16 21:11 ` Drew Adams
2022-10-17 5:41 ` Stefan Kangas
2022-10-17 10:41 ` Lars Ingebrigtsen
2022-10-15 12:33 ` Stefan Kangas
2022-10-15 14:11 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
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