From: Eli Zaretskii <eliz@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: Which Elisp types are mutable?
Date: Mon, 05 Jul 2021 21:48:51 +0300 [thread overview]
Message-ID: <834kd8ha0c.fsf@gnu.org> (raw)
In-Reply-To: <4AA1E624-B979-4B08-8AE0-E33A1C9A0E94@gmail.com> (message from Philipp on Mon, 5 Jul 2021 20:41:58 +0200)
> From: Philipp <p.stephani2@gmail.com>
> Date: Mon, 5 Jul 2021 20:41:58 +0200
> Cc: Help Gnu Emacs mailing list <help-gnu-emacs@gnu.org>
>
> > Well, in my book, "you can't mutate them" is. You always /can/ mutate
> > a string, but of you do it in certain circumstances, you're asking for
> > trouble.
>
> You can mutate all objects, because all of them are stored in mutable memory.
Not if you put it in read-only memory: you'd get a segfault with any
modern OS.
> For a reference manual, "you're asking for trouble" isn't a terribly useful statement.
And "you must not mutate them" is? At least "you're asking for
trouble" explains why not, especially if it actually describes some of
the trouble.
next prev parent reply other threads:[~2021-07-05 18:48 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-03 4:03 Which Elisp types are mutable? Marcin Borkowski
2021-06-03 12:11 ` Philipp
2021-06-05 11:22 ` Marcin Borkowski
2021-06-05 12:58 ` Philipp
2021-06-05 14:25 ` Stefan Monnier via Users list for the GNU Emacs text editor
2021-07-05 18:40 ` Philipp
2021-07-05 20:19 ` Stefan Monnier
2021-07-05 20:44 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-05 20:58 ` Stefan Monnier via Users list for the GNU Emacs text editor
2021-07-05 21:03 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-06-05 19:19 ` Marcin Borkowski
2021-06-05 20:17 ` [External] : " Drew Adams
2021-06-05 20:36 ` Dmitry Gutov
2021-06-06 1:57 ` Drew Adams
2021-07-05 18:41 ` Philipp
2021-07-05 18:48 ` Eli Zaretskii [this message]
2021-07-05 18:55 ` tomas
2021-07-05 19:26 ` [External] : " Drew Adams
2021-07-05 19:40 ` tomas
2021-07-05 20:03 ` Drew Adams
2021-07-05 20:12 ` tomas
2021-07-05 20:39 ` Drew Adams
2021-07-05 20:58 ` Emanuel Berg via Users list for the GNU Emacs text editor
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
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=834kd8ha0c.fsf@gnu.org \
--to=eliz@gnu.org \
--cc=help-gnu-emacs@gnu.org \
/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.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).