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

[Lars Ingebrigtsen]

Lars Ingebrigtsen <larsi@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.

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   bloggy blog: http://lars.ingebrigtsen.no