In article <20080220173913.44146E0689 / mail.bc9.jp>,
  Nobuyoshi Nakada <nobu / ruby-lang.org> writes:

> Am I missing any meta characters?

"^", "$".
"-", ":", "&" in character class.
"," in {n,m}.

not complete, maybe.

I'm not sure why we need to remove extra backslashes in
parser.
-- 
Tanaka Akira