cljs.math/multiply-exact

function

since v1.11.50

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Source docstring:

Returns the product of x and y, throws ArithmeticException on overflow. 

(defn ^number multiply-exact
  {:added "1.11.10"}
  [x y]
  (let [r (* x y)]
    (if (or (> r js/Number.MAX_SAFE_INTEGER) (< r js/Number.MIN_SAFE_INTEGER))
      (throw (ex-info "Integer overflow" {:fn "multiply-exact"}))
      r)))

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