example sibilant macro to turn console.log calls into comments at compile time

console.log.sibilant

(var DEBUG-LEVEL 10
     console-log-orig console.log)
(assign console.log
  (#(...argv)
    (when (< 0 DEBUG-LEVEL)
      (console-log-orig.apply console argv))))

;; comment this out to preserve console.log in js output
(macro console.log (...body) `(comment ...@body))