if-let (ala scheme or clojure) in Hy!

iflet.hy

(defmacro/g! if-let [bindings then &rest else]
  (let [[form (first bindings)]
         [tst (second bindings)]]
    `(let [[~g!temp ~tst]]
       (if ~g!temp
         (let [[~form ~g!temp]]
           ~then)
         ~@else))))