bug#60983: 29.0.60; Tree-sitter user-level control

[Eli Zaretskii]

> From: Yuan Fu <casouri@gmail.com>
> Date: Sat, 4 Feb 2023 15:38:17 -0800
> Cc: Bug Report Emacs <bug-gnu-emacs@gnu.org>,
>  theo@thornhill.no
> 
> > treesit-font-lock-recompute-features is a non-interactive function, so
> > mentioning it in the user manual is generally inappropriate.  Users
> > are unlikely to add features that aren't already defined in the mode's
> > font-lock setup.
> > 
> > This function and its use in these situations are described in the
> > ELisp manual, where I think it belongs.
> > 
> > As for the fact that changing treesit-font-lock-feature-list directly
> > doesn't have any effect, that is already in the doc string.  I'm not
> > opposed to mentioning that in the manual as well, but I see no problem
> > with what we have.
> 
> I see. Sounds good to me. I meant enabling/disabling features when I say 
> “adding/removing” features. Does that make anything different?

Yes, that's how I understood what you were saying: changing the list
of features enabled/disabled by specific levels.  This is not a
user-level thing, so describing it in the ELisp manual is good enough,
I think.  (If it turns out users want to do this kind of thing too
often, it probably means our design of the user-facing features is
sub-optimal and should be improved.)