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From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: mail@daniel-mendler.de, larsi@gnus.org, 55205@debbugs.gnu.org
Subject: bug#55205: 28.1.50; completion--replace illegally mutates completion candidates
Date: Mon, 02 May 2022 12:34:28 -0400	[thread overview]
Message-ID: <jwvsfprj3qj.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <834k276gyd.fsf@gnu.org> (Eli Zaretskii's message of "Mon, 02 May 2022 19:24:10 +0300")

> I have no idea.  The way you present this is waaay above my level of
> understanding.
>
> Completion takes text typed by the user and produces strings that the
> user could possibly mean by typing what he/she typed.  Some part(s) of
> the candidates can legitimately come from what the user typed, some
> other part(s) could be invented by the completion machinery more or
> less out of thin air.  Why should anyone expect this meat-grinder to
> refrain from destructively modifying any of the involved strings?

Because the overwhelming majority of strings are never modified.
It's very unusual to modify a string by side effect (as opposed to
creating a new string object via `concat`, `substring`, ...).
This is true in most languages, AFAICT, but it's definitely true in
ELisp.


        Stefan






  reply	other threads:[~2022-05-02 16:34 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-01  8:27 bug#55205: 28.1.50; completion--replace illegally mutates completion candidates Daniel Mendler
2022-05-01 11:53 ` Lars Ingebrigtsen
2022-05-01 12:17   ` Eli Zaretskii
2022-05-01 20:11     ` Dmitry Gutov
2022-05-02  2:23       ` Eli Zaretskii
2022-05-02  9:46         ` Dmitry Gutov
2022-05-02 14:27           ` Eli Zaretskii
2022-05-02 21:06             ` Dmitry Gutov
2022-05-02 16:01     ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-05-02 16:24       ` Eli Zaretskii
2022-05-02 16:34         ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2022-05-02 16:38           ` Daniel Mendler
2022-05-02 16:47             ` Eli Zaretskii
2022-05-02 16:43           ` Eli Zaretskii
2022-05-02 16:48             ` Daniel Mendler
2022-05-02 16:53               ` Eli Zaretskii
2022-05-02 16:57                 ` Daniel Mendler
2022-05-02 17:53                   ` Eli Zaretskii
2022-05-02 18:35                     ` Daniel Mendler
2022-05-02 21:18                 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-05-01 12:40   ` Daniel Mendler
2022-05-01 12:49     ` Eli Zaretskii
2022-05-01 12:54       ` Daniel Mendler
2022-05-01 13:16         ` Eli Zaretskii
2022-05-01 13:19           ` Daniel Mendler
2022-05-01 13:21             ` Daniel Mendler
2022-05-01 12:50     ` Daniel Mendler
2022-05-01 17:07   ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-05-01 17:26     ` Lars Ingebrigtsen
2022-05-01 17:36       ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-05-01 17:48         ` Lars Ingebrigtsen
2022-05-01 18:34           ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-05-01 18:27       ` Daniel Mendler
2022-05-01 18:39         ` Lars Ingebrigtsen
2022-05-01 19:01           ` Daniel Mendler
2022-05-01 19:07             ` Lars Ingebrigtsen
2022-05-01 20:52               ` Dmitry Gutov
2022-05-01 20:54                 ` Lars Ingebrigtsen
2022-05-01 21:30                   ` Dmitry Gutov
2022-05-01 21:43                     ` Lars Ingebrigtsen
2022-05-02  6:31           ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-05-02  8:11             ` Lars Ingebrigtsen
2022-05-02  9:00               ` Daniel Mendler
2022-05-02 12:23               ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-05-03 10:13                 ` Lars Ingebrigtsen
2022-05-03 12:55                   ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-05-04  7:48                     ` Lars Ingebrigtsen
2022-05-04  8:24                       ` Daniel Mendler
2022-05-04  8:51                         ` Daniel Mendler
2022-05-02  8:49             ` Daniel Mendler
2022-05-02  9:04               ` Lars Ingebrigtsen
2022-05-02  9:57                 ` Daniel Mendler
2022-05-02 10:07                   ` Lars Ingebrigtsen
2022-05-02 10:17                     ` Daniel Mendler
2022-05-01 17:39     ` Eli Zaretskii
2022-05-01 18:06     ` Daniel Mendler
2022-05-02  0:34   ` Richard Stallman

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