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object Test {
def shortName(x: AnyRef) = x.getClass.getName split '.' last
type Handler[+T] = PartialFunction[Throwable, T]
val standardHandler: Handler[String] = {
case x: java.util.NoSuchElementException => shortName(x)
case x: java.lang.IllegalArgumentException => shortName(x)
}
def fn[T: Handler](body: => T): T = {
try body
catch implicitly[Handler[T]]
}
def f1 = {
implicit val myHandler = standardHandler
println(fn(Nil.head))
println(fn(null.toString))
}
def f2 = {
implicit val myHandler: Handler[String] = standardHandler orElse {
case x => "DEBUG: " + shortName(x)
}
println(fn(Nil.head))
println(fn(null.toString))
}
def main(args: Array[String]): Unit = {
try f1
catch { case x => println(shortName(x) + " slipped by.") }
f2
}
}
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