Here is the if-let*:

(defmacro if-let*
([bindings then]
`(if-let* ~bindings ~then nil))
([bindings then else]
(if (seq bindings)
`(if-let [~(first bindings) ~(second bindings)]
(if-let* ~(drop 2 bindings) ~then ~else)
~(if-not (second bindings) else))
then)))

And when-let*:

(defmacro when-let* ([bindings & body] (if (seq bindings) `(when-let 
[~(first bindings) ~(second bindings)] (when-let* ~(drop 2 bindings) 
~@body)) `(do ~@body))))

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