Is there a BNF mode for Emacs?

Question

I have to edit lots of grammar files in .bnf format. Is there a mode for this in Emacs?

I\'ve looked at CEDET\'s semantic package, and it seems that it USED to have

Answer 1

To be more readable and findable as an answer, jmmcd answered his own question with the following. You can find more in the emacs Help > elisp > 23.2.6 Generic Modes.

---

"I put this in my .emacs and it seems to work."

(define-generic-mode 'bnf-mode 
  '("#") 
  nil 
  '(("^<.*?>" . 'font-lock-variable-name-face) 
    ("<.*?>" . 'font-lock-keyword-face) 
    ("::=" . 'font-lock-warning-face) 
    ("\|" . 'font-lock-warning-face))
  '("\\.bnf\\.pybnf\\'") 
  nil 
  "Major mode for BNF highlighting.")