GNU bug report logs - #47427
26.3; 1. Please define a built-in predicate `plistp', 2. wrong type wrong-type-argument error

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Package: emacs;

Reported by: Drew Adams <drew.adams <at> oracle.com>

Date: Fri, 26 Mar 2021 22:28:02 UTC

Severity: wishlist

Found in version 26.3

Fixed in version 29.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

Full log

Message #26 received at 47427 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Drew Adams <drew.adams <at> oracle.com>
Cc: 47427 <at> debbugs.gnu.org
Subject: Re: bug#47427: 26.3; 1. Please define a built-in predicate
 `plistp', 2. wrong type wrong-type-argument error
Date: Mon, 27 Jun 2022 12:37:11 +0200

Lars Ingebrigtsen <larsi <at> gnus.org> writes:

> Adding a `plistp' predicate
> would perhaps make sense, but it would just be
>
> (and (listp list)
>      (zerop (mod (length list) 2)))
>
> and then we have the philosophical issue of "is nil a plist"?  Does
> anybody have any opinions?

I decided that nil satisfies plistp, and I've now pushed a variant of
this to Emacs 29.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no
This bug report was last modified 2 years and 326 days ago.

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