From: Stefan Monnier <monnier@IRO.UMontreal.CA>
To: phillip.lord@russet.org.uk (Phillip Lord)
Cc: Chong Yidong <cyd@gnu.org>, 23632@debbugs.gnu.org
Subject: bug#23632: 25.1.50; Gratuitous undo boundary in latex-insert-block
Date: Fri, 03 Jun 2016 13:00:03 -0400 [thread overview]
Message-ID: <jwveg8eb4es.fsf-monnier+emacsbugs@gnu.org> (raw)
In-Reply-To: <87shwutfmo.fsf@russet.org.uk> (Phillip Lord's message of "Fri, 03 Jun 2016 17:13:19 +0100")
> Simple let binding would not give quite the same functionality, because
> of the last part -- I also add a boundary to buffers with a greater
> recursive depth; with a let binding, I think these would be unbound for
> commands that lower the recursion depth.
Ah, you mean that the value of undo-auto--undoably-changed-buffers needs
to be propagated "out" when we leave the let-binding. You're right.
So instead of a simple `let', it needs to be something like:
(let ((tmp ()))
(unwind-protect
(let ((undo-auto--undoably-changed-buffers nil))
(unwind-protect
<do-it-all>
(setq tmp undo-auto--undoably-changed-buffers)))
(setq undo-auto--undoably-changed-buffers
(append tmp undo-auto--undoably-changed-buffers))))
Or
(let ((tmp undo-auto--undoably-changed-buffers))
(unwind-protect
(progn
(setq undo-auto--undoably-changed-buffers nil)
<do-it-all>)
(setq undo-auto--undoably-changed-buffers
(append undo-auto--undoably-changed-buffers tmp))))
Maybe a simple alternative would be to do
(let ((undo-auto--undoably-changed-buffers nil))
(unwind-protect
<do-it-all>
(undo-auto--ensure-boundary undo-auto--undoably-changed-buffers)))
-- Stefan
next prev parent reply other threads:[~2016-06-03 17:00 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-27 15:11 bug#23632: 25.1.50; Gratuitous undo boundary in latex-insert-block Chong Yidong
2016-05-28 8:22 ` Chong Yidong
2016-05-29 21:51 ` Phillip Lord
2016-05-31 21:42 ` Phillip Lord
2016-06-01 13:15 ` Stefan Monnier
2016-06-02 20:08 ` Phillip Lord
2016-06-03 13:00 ` Stefan Monnier
2016-06-03 16:13 ` Phillip Lord
2016-06-03 17:00 ` Stefan Monnier [this message]
2016-06-03 22:18 ` Phillip Lord
2016-06-04 3:05 ` Stefan Monnier
2016-06-04 8:51 ` Phillip Lord
2016-06-04 16:49 ` Stefan Monnier
2016-06-04 17:17 ` Phillip Lord
2016-06-04 18:41 ` Stefan Monnier
2016-06-06 14:33 ` Phillip Lord
2016-06-06 15:02 ` Stefan Monnier
2016-06-06 15:36 ` Phillip Lord
2016-06-06 15:26 ` Eli Zaretskii
2016-06-06 15:38 ` Phillip Lord
2016-06-06 16:22 ` Eli Zaretskii
2016-06-07 11:20 ` Phillip Lord
2016-06-07 15:09 ` Eli Zaretskii
2016-06-03 2:58 ` Chong Yidong
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