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Re: An idea: combine-change-calls

From: Stefan Monnier
Subject: Re: An idea: combine-change-calls
Date: Mon, 02 Apr 2018 20:41:18 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

>> So, AFAIK it's handled properly by undo itself, undo-tree, and
>> undo-in-region.  Which "package that manipulate buffer-undo-list" are
>> you thinking of?
> Actually, undo-in-region is problematic.  Aside from undo-elt-in-region
> (see above), which is easy to fix, there is undo-adjust-elt "Return
> adjustment of undo element ELT by the undo DELTAS list.", which can't
> adjust the contents of an (apply ...) element,

Indeed, that's a very real problem.
I've moved this to bug#31035

> Why do we have undo-in-region at all?

Because it's a great feature.


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