clojure's thread-last macro, aka ->>, in wisp | See https://clojuredocs.org/clojure.core/-%3E%3E

thread-last.wisp

(defmacro -->
  [x & forms]
  (let [next (fn [x] (let [r (rest x)] (if (empty? r) nil r)))]
    (loop [x x, forms forms]
      (if forms
        (let [form (first forms)
              threaded (if (list? form)
                         (with-meta
                           `(~(first form) ~@(next form)  ~x)
                           (meta form))
                         (list form x))]
          (recur threaded (next forms)))
        x))))