From: Richard Stallman <rms@gnu.org>
To: Michael Heerdegen <michael_heerdegen@web.de>
Cc: eggert@cs.ucla.edu, stepnem@gmail.com, emacs-devel@gnu.org
Subject: Re: emacs-27 eebfb72 1/2: Document constant vs mutable objects better
Date: Mon, 20 Apr 2020 21:48:28 -0400 [thread overview]
Message-ID: <E1jQi1U-0003AI-2Y@fencepost.gnu.org> (raw)
In-Reply-To: <871rojc8qk.fsf@web.de> (message from Michael Heerdegen on Mon, 20 Apr 2020 02:16:03 +0200)
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> > Regarding comparing two equal floats, strings or lists by `eq', you warn
> > about its undefinedness ("might not return nil") repeatedly, but can you
> > give an actual example where (eq 1.2 1.2) or (eq "string" "string")
> > returns non-nil in Elisp?
> (eq "" "") => t. You don't even have to compile.
I just evaluated (eq "string" "string") and got nil.
I think (eq "" "") is an exception.
--
Dr Richard Stallman
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)
prev parent reply other threads:[~2020-04-21 1:48 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200418200112.26900.1274@vcs0.savannah.gnu.org>
[not found] ` <20200418200114.85C8C20A2B@vcs0.savannah.gnu.org>
2020-04-18 21:24 ` emacs-27 eebfb72 1/2: Document constant vs mutable objects better Štěpán Němec
2020-04-18 21:57 ` Drew Adams
2020-04-19 20:37 ` Paul Eggert
2020-04-19 22:33 ` Štěpán Němec
2020-04-19 23:48 ` Paul Eggert
2020-04-20 0:18 ` Michael Heerdegen
2020-04-20 10:05 ` emacs-27 eebfb72 1/2: Document constant vs mutable objects better, Re: emacs-27 eebfb72 1/2: Document constant vs mutable objects better, " Štěpán Němec
2020-04-20 23:18 ` Michael Heerdegen
2020-04-22 17:54 ` Paul Eggert
2020-05-02 12:50 ` Štěpán Němec
2020-05-02 21:08 ` Paul Eggert
2020-04-20 0:16 ` Michael Heerdegen
2020-04-21 1:48 ` Richard Stallman [this message]
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