bug#64647: Re: bug#64647: treesit-query-error due to a recent change to tree-sitter-javascript grammar definition

[Theodor Thornhill]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Vincenzo Pupillo <v.pupillo@gmail.com>
>> Cc: 64647@debbugs.gnu.org, jostein@kjonigsen.net
>> Date: Sun, 16 Jul 2023 20:00:43 +0200
>> 
>> In my patch for java-ts-mode I used treesit-query-capture to figure out 
>> whether 
>> a symbol was defined or not. Check out the java-ts-mode--string-highlight-
>> helper function.
>
> Can you do something similar in this case?  That would be good enough
> for Emacs 29.1.
>
>> > Vincenzo, do you want to add compat-code to emacs-29 and your patches?
>> 
>> Okay. I think I can do it this week. Do I create a new file, like treesitter-
>> compat.el ?
>
> This should be for master, I think.  I'd like to release Emacs 29.1
> soon, so this more general job should be less urgent than fixing the
> typescript modes to work with the latest grammars.
>
> Thanks.

Yeah, I was thinking maybe we could just have a check in the major-mode
init, and appending the appropriate nodes into the
treesit-simple-indent-rules there, rather than in the variable
itself. That way we can avoid performance regressions in the indentation
code. That would mean to extract the nodes you changed in your current
patches, maybe add them to a new variable with a name of your choosing,
and conditionally add either-or when the mode inits. Does that make sense?

Thanks,
Theo