How to convert X => Option[R] to PartialFunction[X,R]

Question

As long as we have a PartialFunction[X,R] it\'s very easy to convert it to a function returning Option[R], e.g.

def pfToOptf[X, R](         


        

Answer 1

Starting Scala 2.9, Function.unlift does precisely this:

def unlift[T, R](f: (T) => Option[R]): PartialFunction[T, R]

Turns a function T => Option[R] into a PartialFunction[T, R].