(fun print_through (x) (let (_ (println x)) x))

(fun is_pair? (x) (and (vector? x) (> (len x) 0)))

(set! quasiquote (vau de (x)
    (cond (is_pair? x)
                (cond (and (symbol? (idx x 0)) (= (get-text (idx x 0)) "unquote"))
                            (eval (idx x 1) de)
                      true
                            (cond (and (is_pair? (idx x 0)) (symbol? (idx (idx x 0) 0)) (= (get-text (idx (idx x 0) 0)) "splice-unquote"))
                                        (concat (eval (idx (idx x 0) 1) de) (apply quasiquote [(slice x 1 -1)] de))
                                  true
                                        (concat [(apply quasiquote [(idx x 0)] de)] (apply quasiquote [(slice x 1 -1)] de))))
          true x)))

(add_grammar_rule 'form '("`" optional_WS form) (lambda (_ _ f) ['quasiquote f]))
(add_grammar_rule 'form '("~" optional_WS form) (lambda (_ _ f) ['unquote f]))
(add_grammar_rule 'form '("," optional_WS form) (lambda (_ _ f) ['splice-unquote f]))