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From: "Roland Winkler" <Roland.Winkler@physik.uni-erlangen.de>
Newsgroups: gmane.emacs.devel
Subject: Re: undoing changes automatically
Date: Mon, 12 Nov 2007 22:21:21 +0100
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To: David Kastrup <dak@gnu.org>
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On Mon Nov 12 2007 David Kastrup wrote:
> > So I want to put the call to undo in the code such that it undoes
> > all the formatting before it throws the error.
> 
> atomic-change-group is a Lisp macro in `subr.el'.
> (atomic-change-group &rest BODY)
> 
> Perform BODY as an atomic change group.
> This means that if BODY exits abnormally,
> all of its changes to the current buffer are undone.
> This works regardless of whether undo is enabled in the buffer.

Perfect, thanks. It seems that this does exactly what I want.

Roland