when-some

macro

since v0.0-2261

imported clojure.core/when-some

Edit

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Details:

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See Also:

• if-some

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Source docstring:

bindings => binding-form test

When test is not nil, evaluates body with binding-form bound to the
value of test

(defmacro when-some
  {:added "1.6"}
  [bindings & body]
  (assert-args
     (vector? bindings) "a vector for its binding"
     (= 2 (count bindings)) "exactly 2 forms in binding vector")
   (let [form (bindings 0) tst (bindings 1)]
    `(let [temp# ~tst]
       (if (nil? temp#)
         nil
         (let [~form temp#]
           ~@body)))))

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