Re: Make all tree-sitter modes optional

[Po Lu]

Alan Mackenzie <acm@muc.de> writes:

> Hello, Eli.
>
> On Thu, Feb 16, 2023 at 10:26:00 +0200, Eli Zaretskii wrote:
>> > Date: Thu, 16 Feb 2023 06:45:13 +0100
>> > From: <tomas@tuxteam.de>
>
>> > On Wed, Feb 15, 2023 at 10:06:35PM +0200, Eli Zaretskii wrote:
>
>> > > Well, I do.  And I explained this several times already in the past,
>
>> > I don't understand that. To me it feels like pushing people to bump
>> > into ts-modes whether they want or not.
>
>> These modes are completely optional, turned off by default.  Users
>> need to turn them on, in one of the described ways, for them to take
>> any effect.  None of the described ways of turning on the modes
>> happens automatically.  I'm bewildered how this can be regarded as
>> "pushing people to bump into" these modes.  Are you sure we are
>> talking about the same editor?
>
> I'm a little surprised that you don't appreciate how other people (such
> as me) work, and that you seem to regard restarting Emacs as a perfectly
> acceptable way of reversing M-x c-ts-mode.
>
> (Some) users will not be satisfied with a single switch to c-ts-mode,
> they will want to move backwards and forwards to and from CC Mode IN THE
> SAME EMACS SESSION, and will resent continually having to restart Emacs
> to do so.
>
> This "moving backwards and forward" is asymmetric.  It is far, far
> easier to switch into c-ts-mode than switch out of it, and I feel this
> is not right.  It is why I proposed c-make-ts-undefault-mode.
>
> Also, restarting Emacs will NOT restore auto-mode-alist, unless the user
> doesn't use desktop, or somehow knows (how?) he must clear his desktop
> of c-ts-mode buffers before restarting.  I foresee much wasted time and
> frustration resulting from this.

Is c-ts-mode made default immediately after the file is loaded, or after
c-ts-mode is first enabled?

The first is at least considered a Bad Thing, and that wisdom is written
down somewhere in the Lisp reference manual.  (elisp)Major Mode
Conventions perhaps?