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Re: About self-referential object


From: Pascal J. Bourguignon
Subject: Re: About self-referential object
Date: Sat, 05 Jan 2013 01:07:53 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.2 (gnu/linux)

"Drew Adams" <address@hidden> 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 {}.


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