From: Lars Ingebrigtsen <larsi@gnus.org>
To: Robin Templeton <robin@terpri.org>
Cc: 19790@debbugs.gnu.org
Subject: bug#19790: [PATCH] destructive splicing in backquote
Date: Tue, 25 Jun 2019 19:59:30 +0200 [thread overview]
Message-ID: <m3o92l35rx.fsf@gnus.org> (raw)
In-Reply-To: <87ziurr8dw.fsf@gnus.org> (Lars Ingebrigtsen's message of "Tue, 23 Feb 2016 22:08:59 +1100")
Lars Ingebrigtsen <larsi@gnus.org> writes:
> Robin Templeton <robin@terpri.org> writes:
>
>> Common Lisp and MACLISP define comma-dot syntax for destructive splicing
>> in backquote expressions. The Elisp reader reads ",.x" as "(\,\. x)"
>> (like ",@"), but the resulting forms are not processed by the backquote
>> library. A patch follows that adds CL-compatible comma-dot support.
>>
>> Originally reported by at Artur Malabarba in
>> <http://lists.gnu.org/archive/html/emacs-devel/2015-01/msg00624.html>.
>
> I think the conclusion to the discussion was that we do not want to
> support the ,. operation in Emacs Lisp.
>
> (setq .foo 1)
>
> `((,.foo))
> => (((\,\. foo)))
>
> So we should remove this feature completely, because that's obviously a
> bug...
It still is. Anybody object to removing it? And where is it even
defined?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
next prev parent reply other threads:[~2019-06-25 17:59 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-06 6:39 bug#19790: [PATCH] destructive splicing in backquote Robin Templeton
2015-02-06 15:29 ` Stefan Monnier
2015-02-07 18:51 ` Robin Templeton
2015-02-07 21:46 ` Robin Templeton
2015-02-08 19:23 ` Stefan Monnier
2015-02-08 19:38 ` Artur Malabarba
2015-02-09 3:10 ` Stefan Monnier
2015-02-09 13:03 ` Artur Malabarba
2016-02-23 11:08 ` Lars Ingebrigtsen
2019-06-25 17:59 ` Lars Ingebrigtsen [this message]
2019-06-25 22:52 ` Michael Heerdegen
2019-09-13 23:59 ` Stefan Kangas
2019-09-14 7:15 ` Eli Zaretskii
2019-09-14 12:31 ` Stefan Kangas
2019-09-14 13:30 ` Eli Zaretskii
2019-09-15 14:55 ` Stefan Kangas
2019-09-15 1:46 ` Stefan Monnier
2019-09-15 14:57 ` Stefan Kangas
2019-09-26 16:38 ` Stefan Kangas
2019-09-14 12:07 ` Lars Ingebrigtsen
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