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From: Alan Mackenzie <acm@muc.de>
To: Phillip Lord <phillip.lord@russet.org.uk>
Cc: 23785@debbugs.gnu.org
Subject: bug#23785: Emacs 25: "Undo" overdoes things.
Date: Sat, 18 Jun 2016 17:41:36 +0000	[thread overview]
Message-ID: <20160618174136.GC5796@acm.fritz.box> (raw)
In-Reply-To: <877fdny0ew.fsf@russet.org.uk>

Hello, Phil.

On Fri, Jun 17, 2016 at 10:23:51PM +0100, Phillip Lord wrote:
> Alan Mackenzie <acm@muc.de> writes:

> > I don't think it's all that minor an issue.  `undo' can no longer be
> > depended upon to restore a buffer to its unchanged state.

> > I've suffered several similar annoyances with `undo' in the emacs-25
> > branch.

> If you report them, then I will look at them, and I would appreciate if
> you do report them.

For example, at times I've deleted a character, moved point, then deleted
another character.  Undo has undone both deletions as a single operation,
despite the point movement between them.

> I changed undo in a way that *was* supposed to change its semantics,
> and this may have had negative side effects. Or my changes may have
> caused unexpected changes in semantics that I did not intend.

The lack of configurability seems to be a problem.  There have been
times, testing times, when I've felt that each deletion of a character is
its own atomic operation.  Yet I can't configure undo to respect this
wish.

[ .... ]

> I will investigate.

> Phil

-- 
Alan Mackenzie (Nuremberg, Germany).





  reply	other threads:[~2016-06-18 17:41 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-17 15:02 bug#23785: Emacs 25: "Undo" overdoes things Alan Mackenzie
2016-06-17 17:15 ` Eli Zaretskii
2016-06-17 17:45   ` Alan Mackenzie
2016-06-17 20:07     ` Eli Zaretskii
2016-06-17 21:47       ` Phillip Lord
2016-06-18  4:46         ` Stefan Monnier
2016-06-18  7:54         ` Eli Zaretskii
2016-06-18 18:42           ` Stefan Monnier
2016-06-18 19:02             ` Eli Zaretskii
2016-06-18 19:52               ` Stefan Monnier
2016-06-19 22:45                 ` bug#23785: Emacs 25: 'Undo' " Phillip Lord
2016-06-20  0:59                   ` Stefan Monnier
2016-06-20 12:47                     ` Phillip Lord
2016-06-20 14:04                       ` Stefan Monnier
2016-06-20 15:03                   ` Phillip Lord
2016-06-20 15:34                     ` Eli Zaretskii
2016-06-20 17:12                       ` Phillip Lord
2016-06-21 13:17                         ` Eli Zaretskii
2016-06-21 14:30                           ` Phillip Lord
2016-06-21 21:25                         ` Stefan Monnier
2016-06-21 22:08                           ` Phillip Lord
2020-09-04 14:03                             ` Lars Ingebrigtsen
2020-09-05 13:15                               ` Alan Mackenzie
2016-06-21 13:18                     ` Eli Zaretskii
2016-06-21 14:29                       ` Phillip Lord
2016-06-21 16:13                         ` Eli Zaretskii
2016-06-17 21:23     ` bug#23785: Emacs 25: "Undo" " Phillip Lord
2016-06-18 17:41       ` Alan Mackenzie [this message]
2016-06-17 21:49     ` Óscar Fuentes
2016-06-20 12:33       ` Phillip Lord

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