Naive implementation of stackfn language using clojure macro

Language example:
  (defstackfn f [!a !b !c]
                  !a
                  !b
                  (invoke> + 2)
                  !v1+
                  !c
                  !c
                  <pop>
                  2
                  (invoke> * 2)
                  !v2+
                  (invoke> = 2)
                  (if>
                    !v1
                    !v2
                    (invoke> - 2)
                    else>
                    "false!!"
                    (invoke> println 1)
                    <pop>
                    !v1
                    !v2
                    (invoke> * 2)))