Re: Subversion of user chosen major mode by Emacs. [Was: My usage of imenu is broken.]

[Alan Mackenzie <acm@muc.de>]

Hello, Stefan.

On Thu, May 30, 2024 at 11:12:44 -0400, Stefan Monnier wrote:
> >> AFAICT it is a lot more common for file-local vars to be abused to
> >> specify mere user preferences, than the reverse (i.e. where there really
> >> is a technical reason why the file should be edited with js2-mode rather
> >> than js-mode).
> > "More common", maybe.  But that doesn't mean the other case doesn't
> > exist or is not legitimate.

> I don't doubt such cases exist.  I personally can't think of any, tho.
> So, being hypothetical, I tend to consider it as a fringe problem which
> is OK to solve with fringe solutions.

> Can you point to non-hypothetical examples?

I can point to a semi-hypothetical case: A device driver hacker may need
to use C Mode for a "hardware description" file which contains a 40,000
line function, for which c-ts-mode is unusably slow.  I have such a
file, packet-rrc.c, in my desktop.  The said hacker may, however, prefer
c-ts-mode for more normal files, so will set up the mode in file-local
variables or the top line of the file.

>         Stefan

-- 
Alan Mackenzie (Nuremberg, Germany).