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From: Drew Adams <drew.adams@oracle.com>
To: "tomas@tuxteam.de" <tomas@tuxteam.de>, Eli Zaretskii <eliz@gnu.org>
Cc: "help-gnu-emacs@gnu.org" <help-gnu-emacs@gnu.org>
Subject: RE: [External] : Re: Which Elisp types are mutable?
Date: Mon, 5 Jul 2021 19:26:23 +0000	[thread overview]
Message-ID: <SA2PR10MB4474D95AA081DC181D688D81F31C9@SA2PR10MB4474.namprd10.prod.outlook.com> (raw)
In-Reply-To: <20210705185503.GD6395@tuxteam.de>

> In Emacs Lisp, typical immutable objects are symbols, keywords, numbers

We've been around this block a few times already,
and I don't really want to stir the pot here.

But I'll mention that a Lisp symbol is a kind of
mutable "object".  It has various properties, some
of which are predefined (whether or not they have
non-nil values) and any number of which others can
be created.  Predefined properties include the
symbol name, value as a variable, and value as a
function.

All except the symbol name can be changed.  Is a
symbol something immutable?  Not IMO, but the
answer depends on what one means by "immutable".

https://www.gnu.org/software/emacs/manual/html_node/elisp/Symbol-Components.html


  reply	other threads:[~2021-07-05 19:26 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
2021-07-05 18:55             ` tomas
2021-07-05 19:26               ` Drew Adams [this message]
2021-07-05 19:40                 ` [External] : " 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

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