(defvar msg-type '(:hello 1
                  :welcome 2
                  :abort 3
                  :challenge 4
                  :authenticate 5
                  :goodbye 6
                  :error 8
                  :publish 16
                  :published 17
                  :subscribe 32
                  :subscribed 33
                  :unsubscribe 34
                  :unsubscribed 35
                  :event 36
                  :call 48
                  :cancel 49
                  :result 50
                  :register 64
                  :registered 65
                  :unregister 66
                  :unregistered 67
                  :invocation 68
                  :interrupt 69
                  :yield 70))

(optima:match message-type (33 (format t "do something?"))) ; works
(optima:match message-type ((getf msg-type :subscribed) (format t "do something?"))) ; doesn't work