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

[Christopher Dimech]

> Sent: Wednesday, August 31, 2022 at 12:38 AM
> From: "Phil Sainty" <psainty@orcon.net.nz>
> To: "Christopher Dimech" <dimech@gmx.com>
> Cc: 57481@debbugs.gnu.org
> Subject: Re: bug#57481: elisp code utilising derived-mode-parent
>
> 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.

Then the information can only be traced at run-time.  Could things get loaded
if needed without having this requirement done by users?