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

[Dmitry Gutov]

On 27/03/2023 16:39, Eli Zaretskii wrote:
> > Date: Mon, 27 Mar 2023 08:24:42 +0000
> > From: Gregory Heytings<gregory@heytings.org>
> > cc: Eli Zaretskii<eliz@gnu.org>,wkirschbaum@gmail.com,casouri@gmail.com,
> >      62333@debbugs.gnu.org
> >
> > > > 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.

Is that because we don't think the user level narrowing is done purely 
for visual effect? There is, again, a fair amount of confusion there, 
but judging by regular user requests for make this or that command 
ignore user-level narrowing, it seems like "purely visual" should be the 
default interpretation. And for harder narrowing, users could have a 
separate command, or a prefit arg, or etc.

When I'm talking user-level, I mean interactive 'C-x n', of course.