;;;; A [ ] pattern meeting an argument that is not a vector. The pattern says
;;;; what the call has to look like, so this is refused where the argument is
;;;; written rather than inside an expansion that read (at ... 0) of a Sym.
(defmacro do-grid [[r rows c cols] & body]
  `(dotimes [~r ~rows] (dotimes [~c ~cols] ~@body)))

(defn main [] i32
  (do-grid 7 (println "never"))
  0)