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continuation passing transform macro
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(defn & [f k] | |
(fn [& args] | |
(k (apply f args)))) | |
(defmacro cps [steps] | |
(if (seq steps) | |
`(& ~(first steps) | |
(cps ~(rest steps))) | |
`identity)) | |
(defmacro &-> [init & steps] | |
(list `(cps ~(cons `(constantly ~init) steps)))) | |
(&-> 1 #(* 2 %) inc) ;=> 3 |
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