unchecked-add

added
1.0

ns
clojure.core

type
function

(unchecked-add x y)

Returns the sum of x and y, both long.
Note - uses a primitive operator subject to overflow.

                ;; can't interchange INTs with LONGs, only F(int, int) or F(long, long)
;; F is a function, not an operator.
;; overflow very easily as shown below.

user=> (unchecked-add Integer/MAX_VALUE 0)
2147483647

user=> (unchecked-add Integer/MAX_VALUE 1)
-2147483648

user=> (unchecked-add Integer/MAX_VALUE Integer/MAX_VALUE)
-2

user=> (unchecked-add Integer/MAX_VALUE Long/MAX_VALUE)
java.lang.IllegalArgumentException: No matching method found: unchecked_add (NO_SOURCE_FILE:0)

user=> (unchecked-add Integer/MAX_VALUE Long/MAX_VALUE)
java.lang.IllegalArgumentException: No matching method found: unchecked_add (NO_SOURCE_FILE:0)

user=> (unchecked-add Long/MAX_VALUE Long/MAX_VALUE)
-2

user=> (unchecked-add 5 Long/MAX_VALUE)
java.lang.IllegalArgumentException: No matching method found: unchecked_add (NO_SOURCE_FILE:0)

user=> (unchecked-add 5555555555 Long/MAX_VALUE)
-9223372031299220254