store/[org.clojure/clojure "1.8.0"] clj::clojure.core/unchecked-dec

Official Documentation

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Docstring
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  Returns a number one less than x, a long.
  Note - uses a primitive operator subject to overflow.

Source

(defn unchecked-dec
  "Returns a number one less than x, a long.
  Note - uses a primitive operator subject to overflow."
  {:inline (fn [x] `(. clojure.lang.Numbers (unchecked_dec ~x)))
   :added "1.0"}
  [x] (. clojure.lang.Numbers (unchecked_dec x)))

Example 1

Edit
;; => (unchecked-dec 4)
3

;; => (unchecked-dec Integer/MIN_VALUE)
2147483647

Uses on crossclj