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Re: locked narrowing in ELisp

From: Dmitry Gutov
Subject: Re: locked narrowing in ELisp
Date: Fri, 19 Aug 2022 00:42:05 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1

On 18.08.2022 04:58, Stefan Monnier wrote:
Could someone give a few problem scenarios with this patch? Preferably ones
that should be hard to fix. Adapting isearch took about 2 lines.

I don't think there'll be much that's hard to fix, no.  The problem is
rather that there'll be a lot to fix, so it'll basically be half-broken
for a long time.

That is a problem indeed. So at the very least the corresponding feature branch would need attention from somebody (or some people) who use narrowing a lot.

E.g. `C-x h M-x write-region RET` will end up writing something else
than what I'd expect.

I see what you mean. Some region-related commands might need direct support indeed (region-beginning and region-end changes their return values once narrowing it applied).

soft-narrow-to-region might also alter the region, if we decide to support its programmatic application.

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