clojure — correct way to locally override operators such as “+”, “*”, etc

Question

What is the correct way to override a method like \"+\"? Right now I have

(defn- + [x y] (replacement x y))

but this results in warnings on the

Answer 1

You can also override built in arithmetic using generic interfaces from contrib, see the following for a simple example,

http://nakkaya.com/2010/08/02/using-clojure-contrib-generic-interfaces/