From: Lars Ingebrigtsen <larsi@gnus.org>
To: Stefan Kangas <stefankangas@gmail.com>
Cc: psainty@orcon.net.nz, 58513@debbugs.gnu.org, rms@gnu.org,
monnier@iro.umontreal.ca
Subject: bug#58513: describe-function should say that defconst variables are constant
Date: Mon, 17 Oct 2022 12:41:13 +0200 [thread overview]
Message-ID: <874jw2g2ba.fsf@gnus.org> (raw)
In-Reply-To: <CADwFkmm90EzB9J1-Zb_4fpwYUe3CuahwE=h+QZya0d8tMpfavg@mail.gmail.com> (Stefan Kangas's message of "Mon, 17 Oct 2022 05:41:09 +0000")
Stefan Kangas <stefankangas@gmail.com> writes:
> So, to give a somewhat contrived example, you can still break any
> mathematical calculation in Emacs with:
>
> (setq float-pi 9)
>
> The only way to not have your code break in the face of that is to
> copy-paste the literal 3.141592... everywhere.
Yeah, but you can make the same argument for functions. We allow
redefining `+' (and there's no warnings or nothing), but people don't
guard against that, either.
That said, we (in effect) have markup stating the intention for
`float-pi' to be a constant, so adding warnings when people redefine it
makes sense (because it's more likely that somebody does that as a
mistake instead of mistakenly redefining `+').
next prev parent reply other threads:[~2022-10-17 10:41 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
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 [this message]
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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