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object Test {
val X, Y = true
(null: Tuple1[Boolean]) match {
case Tuple1(X) =>
case Tuple1(Y) => // unreachable
case _ =>
}
}
sealed abstract class B;
case object True extends B;
case object False extends B;
object Test2 {
val X: B = True
val Y: B = False
(null: Tuple1[B]) match {
case Tuple1(X) =>
case Tuple1(Y) => // no warning
case _ =>
}
}
object Test3 {
val X, O = true
def classify(neighbourhood: (Boolean, Boolean, Boolean)): String = {
neighbourhood match {
case (X, X, X) => "middle"
case (X, X, O) => "right"
case (O, X, X) => "left"
case _ => throw new IllegalArgumentException("Invalid")
}
}
}
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