bug#61502: 29.0.60; c-ts-mode auto-indent not working

[Theodor Thornhill]

Eli Zaretskii <eliz@gnu.org> writes:

>> Date: Wed, 15 Feb 2023 18:14:46 +0100
>> From: Theodor Thornhill <theo@thornhill.no>
>> CC: pankaj@codeisgreat.org, casouri@gmail.com, 61502@debbugs.gnu.org
>> 
>> >Look back for the first line that has something other than whitespace?
>> 
>> Yeah, we could. But what then with
>> 
>> for (
>>      ;;)
>> |
>> 
>> ?
>> 
>> Not saying it's impossible, but we will get complexity that may be hard to 
>> get into emacs-29, i think.
>
> At some point we will have to rely on electric characters to fix the
> indentation later.  We just need to try to fix the more blatant and
> simple situations, I think, and punt (for now) where it becomes hairy.
>
> I wonder, though: what do other IDEs which use tree-sitter do in these
> cases?

Most of them avoid the whole emacs' tradition of guessing. They usually
just indent and deindent on block openers, otherwise just keep the
previous line indent level.