Should i expect the following to work?

(define-parse-tree-synonym hostname-char #.(cl-ppcre::parse-string "[-a-zA-Z0-9_.]"))

(define-parse-tree-synonym pathname-char (:char-class hostname-char #: #@ #& #? #= #+ #, #! #/ #~ #* #' #% #\ #$)) (define-parse-tree-synonym pathname (:sequence (:greedy-repetition 0 nil pathname-char)))

(scan-to-strings '(:sequence pathname) "My page is at http://www.metabang.com/foo/ boo.")

Error: Unknown symbol HOSTNAME-CHAR in character class While executing: PPCRE::CONVERT-CHAR-CLASS-TO-HASH Type Command-. to abort.

See the Restarts… menu item for further choices. 1 >  Thanks,