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object Test {
val f : PartialFunction[_, Int] = { case a : Int => a } // undefined param
def foo[A](pf: PartialFunction[A, Int]) {};
foo { case a : Int => a } // undefined param
val g : PartialFunction[Int, _] = { case a : Int => a } // okay
}
// Another variation, seen in the wild with Specs2.
class X {
trait Matcher[-T]
def bar[T](m: Matcher[T]) = null
def bar[T](i: Int) = null
def foo[T](p: PartialFunction[T, Any]): Matcher[T] = null
case class M[X](a: X)
bar[M[Any]] (foo { // undefined param
case M(_) => null
})
}
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