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A question about text-property stickiness


From: Darren Hoo
Subject: A question about text-property stickiness
Date: Sat, 14 Aug 2010 06:18:49 +0800

Hi,

>From elisp Manual:
        The text properties `front-sticky' and `rear-nonsticky', when
         used, take precedence over the default NONSTICKINESS specified in
        `text-property-default-nonsticky'.

but the following snip seems not work for me:

(with-current-buffer (get-buffer-create "aaaaa")
  (insert "a")
  (save-excursion
    (backward-char)
    (let ((p (point)))
      (setplist 'mycat '(face highlight rear-nonsticky nil))
      (setq text-property-default-nonsticky '((category . t)))
      (add-text-properties p (1+ p)  '(category mycat))))
  (insert-and-inherit "b"))

I expect "b"  to be highlighted but it is not, why?



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