From: "Pascal J. Bourguignon" <pjb@informatimago.com>
To: help-gnu-emacs@gnu.org
Subject: Re: About self-referential object
Date: Sat, 05 Jan 2013 01:07:53 +0100 [thread overview]
Message-ID: <87txqwh4py.fsf@kuiper.lan.informatimago.com> (raw)
In-Reply-To: mailman.16720.1357343280.855.help-gnu-emacs@gnu.org
"Drew Adams" <drew.adams@oracle.com> writes:
>> (setq foo '(nil)) => (nil)
>> (setcar foo foo) => (#0)
>>
>> It is an infinite recursion. What does the `#0' mean here?
>
> The Elisp manual is your friend. There are no doubt several ways to look this
> up. Start with `i' usually, which uses the indexes.
>
> If you don't find what you want using `i' then try searching: `C-s #0' finds an
> answer immediately in this case, in node `Output Function'.
>
> If you can find what you want by means other than using the indexes (`i'),
> consider reporting an Emacs bug to improve the index, explaining how you tried
> to find it.
Emacs lisp is really baroque.
Why introduce #0 when #1=(#1#) can already denote it?
--
__Pascal Bourguignon__ http://www.informatimago.com/
A bad day in () is better than a good day in {}.
next prev parent reply other threads:[~2013-01-05 0:07 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-04 23:32 About self-referential object Xue Fuqiao
2013-01-04 23:47 ` Drew Adams
2013-01-05 0:24 ` Xue Fuqiao
2013-01-05 0:55 ` Drew Adams
2013-01-05 1:26 ` Xue Fuqiao
2013-01-05 0:27 ` Xue Fuqiao
[not found] ` <mailman.16720.1357343280.855.help-gnu-emacs@gnu.org>
2013-01-05 0:07 ` Pascal J. Bourguignon [this message]
2013-01-08 16:06 ` Stefan Monnier
[not found] <mailman.16719.1357342389.855.help-gnu-emacs@gnu.org>
2013-01-04 23:40 ` Pascal J. Bourguignon
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