From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Alan Mackenzie <acm@muc.de>
Cc: emacs-devel@gnu.org
Subject: Re: (insert ?\n) spuriously calls before-change-functions twice. Help!
Date: Wed, 06 Jan 2010 09:33:36 -0500 [thread overview]
Message-ID: <jwv1vi3gvc0.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <20100106130521.GA2447@muc.de> (Alan Mackenzie's message of "Wed, 6 Jan 2010 13:05:21 +0000")
>> Even if we fix the bug, there can be any number of reasons why the two
>> hooks may occasionally not be paired, .....
> Really? I would have thought they should be rigorously paired, without
> any "recursive" invocations in-between (barring elisp code doing this
> deliberately).
There's combine-after-change-functions for one. Or there's the case
where a signal is thrown in between the two. Of course, there's also
the nesting case.
>> .... so your hooks should be robust against such situations. IOW it's
>> best to try and avoid relying in the after-hook on info passed from the
>> before hook.
> Haven't we discussed this before at some time? ;-)
You mean I should just have said "Told ya!"?
Stefan
next prev parent reply other threads:[~2010-01-06 14:33 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-05 11:09 (insert ?\n) spuriously calls before-change-functions twice. Help! Alan Mackenzie
2010-01-05 15:22 ` Stefan Monnier
2010-01-05 17:31 ` Alan Mackenzie
2010-01-05 19:52 ` Stefan Monnier
2010-01-06 13:05 ` Alan Mackenzie
2010-01-06 14:33 ` Stefan Monnier [this message]
2010-01-19 13:23 ` Alan Mackenzie
2010-01-19 15:11 ` Chong Yidong
2010-01-19 17:11 ` Alan Mackenzie
2010-01-19 18:02 ` Chong Yidong
2010-01-19 22:30 ` Alan Mackenzie
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