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object Test {
def f(x: Any) = println(x match {
case List(_, _) => "two"
case List(_, _, _) => "three"
case xs @ List(_*) => "list: " + xs.length
case _ => "not a list"
})
def f2[T](x: List[T]) = println(x match {
case List(_, _) => "two"
case List(_, _, _) => "three"
case List(xs @ _*) => "list: " + xs.length
// bug: the default case is marked unreachable
// case _ => "not a list"
})
def main(args: Array[String]) {
f(List(1, 2))
f(List('a', 'b', 'c'))
f(List('a', 'b', 'c', 'd'))
f(Nil)
f(List(1,2,3,4,5))
f(null)
println
f2(List(1, 2))
f2(List('a', 'b', 'c'))
f2(List('a', 'b', 'c', 'd'))
f2(Nil)
f2(List(1,2,3,4,5))
// bug: this NPEs on xs.length
// f2(null)
}
}
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