Subject: Re: bug#62333: 30.0.50; Issue with tree-sitter syntax tree during certain changes

From: Eli Zaretskii <[email-masked]>
Date: Mon, 27 Mar 2023 16:39:37 +0300

> Date: Mon, 27 Mar 2023 08:24:42 +0000
> From: Gregory Heytings <[email-masked]>
> cc: Eli Zaretskii <[email-masked]>, [email-masked], [email-masked], 
>     [email-masked]
> 
> >> Which is a fragile, semi-broken means, as we all know.
> >
> > What is a broken mess, is user-level narrowing. And how the downstream 
> > code can never guess the purpose the narrowing was applied for.
> 
> Note that this is what labeled narrowings attempts to solve.

Labeled narrowing cannot solve this because it does nothing to
alleviate the problems with user-defined narrowing.  So if the user
narrows the buffer, we cannot do anything to safely widen in the
general case, and labeled narrowing cannot help us.