bug#57481: elisp code utilising derived-mode-parent

[Christopher Dimech <dimech@gmx.com>]

> Sent: Wednesday, August 31, 2022 at 1:02 AM
> From: "Eli Zaretskii" <eliz@gnu.org>
> To: "Phil Sainty" <psainty@orcon.net.nz>
> Cc: dimech@gmx.com, 57481@debbugs.gnu.org
> Subject: Re: bug#57481: elisp code utilising derived-mode-parent
>
> > Cc: 57481@debbugs.gnu.org
> > Date: Wed, 31 Aug 2022 00:38:46 +1200
> > From: Phil Sainty <psainty@orcon.net.nz>
> >
> > On 2022-08-31 00:08, Christopher Dimech wrote:
> > > Can one do something that can be run in elisp code and in
> > > lisp-interaction-mode without requirement that the mode one
> > > is interested in has been loaded?
> >
> > You're asking whether Emacs can tell you things it doesn't know.
>
> Well, it's Emacs, isn't it?  Why shouldn't it have a feature whereby
> it tells us things it doesn't know about?  It certainly sounds useful
> to have.

It could find things through and do what it has to do, without requirements
for user mode loading.