Re: Bug in zero-length extents

You should probably ping Kyle, I'm pretty sure he fixed a bug in zero-length extents (or maybe it was Hrvoje, I forget). andy At 08:45 PM 1/28/2002 +0900, Stephen J. Turnbull wrote: > The following code wraps an extent around some text and flags it like > so: > > ->some text<- > > If you then delete the text you get > > <--> > > which is not what I would expect. Anybody know what's going on? > XEmacs 21.4.6. > > (defvar ov nil) > > (defun add-ov (beg end) > (setq ov (make-extent beg end)) > (set-extent-properties ov > `(face red > begin-glyph ,(make-glyph "->") > end-glyph ,(make-glyph "<-")))) > > (defun del-ov () > (delete-extent ov)) > > (add-ov 1 11) > (set-extent-property ov 'detachable nil) > (delete-region 1 11) > > The original example used overlays, see > <20020128093330.78903f25.Manuel.Serrano(a)sophia.inria.fr&gt; > on xemacs-beta and just add the set-extent-property 'detachable sexp > for the same results in that context. > > -- > Institute of Policy and Planning Sciences > http://turnbull.sk.tsukuba.ac.jp > University of Tsukuba Tennodai 1-1-1 Tsukuba > 305-8573 JAPAN > Don't ask how you can "do" free software business; > ask what your business can "do for" free software.