Does the following snippet show the intended behavior? user=> (def not-nil? (complement nil?)) > #'user/not-nil? > user=> (defn f [x] (match [x] [{:a (ma :guard not-nil?)}] ma :else > :no-match)) > #'user/f > user=> (f {:a 1}) > 1 > user=> (f {:b 1}) > nil > user=> (f {:a nil}) > :no-match > user=> > >
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