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From: Stefan Monnier <monnier@iro.umontreal.ca>
To: help-gnu-emacs@gnu.org
Subject: Re: Are two symbols `equal' iff they are `eq'?
Date: Sun, 09 Aug 2015 11:59:45 -0400	[thread overview]
Message-ID: <jwvsi7s1mqd.fsf-monnier+gnu.emacs.help@gnu.org> (raw)
In-Reply-To: mailman.8032.1439135226.904.help-gnu-emacs@gnu.org

> Do I get it right that for two symbols to be `eq' it is enough for them
> to have the same name and to be interned in the same obarray?

If they're interned, then that's pretty much true, but symbols aren't
all interned.


        Stefan


PS: And then of course, there are major ugly hacks like:

(let* ((ob (make-vector 10 nil))
       (s1 (intern "a" ob))
       (s2 (intern "b" ob)))
  (setf (aref (symbol-name s1) 0) ?b)
  (and (equal (symbol-name s1) (symbol-name s2))
       (not (equal s1 s2))))


  parent reply	other threads:[~2015-08-09 15:59 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-09  0:20 Are two symbols `equal' iff they are `eq'? Marcin Borkowski
2015-08-09  1:52 ` Emanuel Berg
2015-08-09  7:44   ` Marcin Borkowski
2015-08-09 15:28 ` Drew Adams
2015-08-09 15:46   ` Marcin Borkowski
2015-08-09 16:38     ` Drew Adams
     [not found]   ` <mailman.8032.1439135226.904.help-gnu-emacs@gnu.org>
2015-08-09 15:59     ` Stefan Monnier [this message]
     [not found] <mailman.7993.1439079676.904.help-gnu-emacs@gnu.org>
2015-08-09  0:31 ` Joost Kremers
2015-08-09  5:16   ` Ian Zimmerman
2015-08-09  7:30     ` Marcin Borkowski
2015-08-09 14:05       ` Michael Heerdegen
2015-08-09 15:10         ` Marcin Borkowski
2015-08-09 15:19           ` Eli Zaretskii
2015-08-09 15:45             ` Marcin Borkowski
2015-08-09 18:19               ` Eli Zaretskii
2015-08-09 19:41                 ` Marcin Borkowski
2015-08-10 15:26               ` Nicolas Richard
     [not found]   ` <mailman.8007.1439097407.904.help-gnu-emacs@gnu.org>
2015-08-09  5:21     ` Rusi
2015-08-09  5:33       ` Ian Zimmerman
2015-08-09  7:42   ` Marcin Borkowski
2015-08-09 14:03     ` Michael Heerdegen
2015-08-09 14:42       ` Marcin Borkowski
2015-08-09 14:47         ` Michael Heerdegen
     [not found]   ` <mailman.8011.1439106166.904.help-gnu-emacs@gnu.org>
2015-08-09 15:38     ` Joost Kremers

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