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From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: "Mattias Engdegård" <mattiase@acm.org>
Cc: 55395@debbugs.gnu.org, Lars Ingebrigtsen <larsi@gnus.org>
Subject: bug#55395: What does (1 2 3 . #2) mean?
Date: Wed, 18 May 2022 17:16:16 -0400	[thread overview]
Message-ID: <jwvmtfefssm.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <86345ABE-C19C-4096-8550-05E5B78D6C3A@acm.org> ("Mattias Engdegård"'s message of "Wed, 18 May 2022 16:29:51 +0200")

>  [(1 2 3 . #0)]
>
> could mean either
>
>  [#1=(1 2 3 . #1#)]
>
> or
>
>  #1=[(1 2 3 . #1#)]

AFAIK it *should* mean the latter (#0 is the root of the overall
printed object, not just the list).

Mattias Engdegård [2022-05-18 16:29:51] wrote:

> Perhaps these attempts to generate a meaningful circularity reference is
> a fool's errand and we should just go with #!circle! or something similar.

Yup.  But we don't shy away from playing the fools.


        Stefan






  reply	other threads:[~2022-05-18 21:16 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-13 11:32 bug#55395: What does (1 2 3 . #2) mean? Mattias Engdegård
2022-05-13 15:22 ` Lars Ingebrigtsen
2022-05-13 17:20   ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-05-13 19:54     ` Lars Ingebrigtsen
2022-05-13 20:01     ` Mattias Engdegård
2022-05-14 13:45       ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-05-18 14:29         ` Mattias Engdegård
2022-05-18 21:16           ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2022-05-23 14:59             ` Mattias Engdegård
2022-05-13 16:08 ` Andreas Schwab

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