Re: plist-put: destructive?

[Eric Abrahamsen]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> So what's the ambiguity? Are there circumstances where a simple
>> plist-put isn't going to modify the original plist?
>
> Yes, when the plist is empty.

Thanks to you both. I'm working with existing plists, so I'll drop the
setqs, that's a relief.

> BTW, in recent Emacsen, you can use
>
>     (setf (alist-get K AL) V)
>
> and it works even when the alist is nil (but it requires AL to be
> a valid *place* rather than an arbitrary expression).  You could make
> something similar for plist-get.

Making something similar would just be the `gv-define-simple-setter'
call I had in the original message, right?