scala> import scala.util.control.Exception.allCatch
import scala.util.control.Exception.allCatch

scala> def intValueOf(s: String): Option[Int] = allCatch.opt { s.toInt }
intValueOf: (s: String)Option[Int]

scala> val x = intValueOf("hello")
x: Option[Int] = None

scala> val y = intValueOf("12345")
y: Option[Int] = Some(12345)