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Problem when optimizing font-lock-keywords


From: Nordlöw
Subject: Problem when optimizing font-lock-keywords
Date: Tue, 21 Oct 2008 07:06:13 -0700 (PDT)
User-agent: G2/1.0

I am trying to optimize my extra calls to font-lock-add-keywords() by
concatenating the MATCHERs like follows:

(defun pnw-fancy/sh-mode-font-locking ()
  "Fancy Shell Script Syntax Highlighting."
  (font-lock-add-keywords
   nil
   (list
    (cons (concat  "\\((\\|)\\)" "?"
                  "\\(\\[\\|]\\|{\\|}\\)" "?"
                  "\\(,\\|;\\)")
          '((1 'font-lock-parens-face keep)
            (2 'font-lock-braces-face keep)
            (3 'font-lock-separator-face keep)))
    )
   t))
(add-hook 'sh-mode-hook 'pnw-fancy/sh-mode-font-locking t)

I believe this idea is used in emacs-lisp-mode() but I can't make it
work --- I get the error:
Error during redisplay: (error No match 1 in highlight (1 (quote font-
lock-parens-face) keep)) [5 times]

What have I missed?

Many thanks in advance,
Nordlöw


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