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crocket / if-let-all.clj
Created June 5, 2015 04:36
if-let-all clojure macro
(defmacro if-let-all
"if-let-all evaluates every local binding sequentially and evaluates true-case only if every local binding is a truthy value.
true-case has access to all local bindings, but false-case doesn't have access to local bindings."
[bindings true-case false-case]
(let [pairs (partition 2 bindings)
names (mapv first pairs)
exprs (map second pairs)
exprs-in-if-let (fn self [[name1 & more-names] [expr1 & more-exprs]]
`(if-let [~name1 ~expr1]
~(if more-names