(defn quoted-string [ch]
  (let [quoteSeparator (is-char ch)
        stringBody (stringify (many1 (either (not-char-of #{ch \# \newline}) (not-followed-by (string "#") (string "{")))))
        expressionBody (let-bind [_ (string "#{")
                                  expr (stringify (many1 (not-char \})))
                                  _ (string "}")]
                                 (result (read-string expr)))
        expansionBody (many (either stringBody expressionBody))
        optimize (fn [exp] (if (== 2 (count exp)) (second exp) exp))]
    (>>== (between quoteSeparator quoteSeparator expansionBody) #(optimize (apply list 'str %)))))