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Function 'compose-region' problem


From: S . P . Tseng
Subject: Function 'compose-region' problem
Date: Wed, 17 Sep 2008 19:00:25 +0800
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux)

GNU Emacs 23.0.60.1 (i686-pc-linux-gnu, X toolkit) of 2008-09-17, function
compose-region seems can not work.

For example, below code can not can not work.

,----
|   (defun pretty-lambdas ()
|     (font-lock-add-keywords
|      nil `(("(\\(lambda\\>\\)"
|             (0 (progn (compose-region (match-beginning 1) (match-end 1)
|                                       ,(make-char 'greek-iso8859-7 107))
|                       nil))))))
`----





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