bug#56682: locked narrowing

[Eli Zaretskii]

> Date: Sat, 20 Aug 2022 16:20:57 +0000
> From: Gregory Heytings <gregory@heytings.org>
> cc: Stefan Monnier <monnier@iro.umontreal.ca>, 56682@debbugs.gnu.org, 
>     dgutov@yandex.ru
> 
> 
> I pushed a (hopefully) improved version of the the locked narrowing 
> feature in the feature/improved-locked-narrowing branch.  It is now 
> possible:
> 
> 1. to unlock a locked narrowing,
> 
> 2. to use narrow-to-region and widen within the bounds of a locked 
> narrowing,
> 
> 3. to enter and leave a locked narrowing within a locked narrowing, and
> 
> 4. to use that feature in Lisp code (either directly or with a helper 
> macro).
> 
> As far as I understand, given that it is possible to unlock a locked 
> narrowing, adding the possibility to choose how the bounds of the locked 
> narrowings are computed has become unnecessary.
> 
> Comments/feedback welcome.

Thanks.

The problem with narrowing around the calls to pre- and post-command
hooks (see https://debbugs.gnu.org/cgi/bugreport.cgi?bug=57207#107)
still exists, AFAICT, and needs to be resolved.