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object LeftOrRight {
def unapply[A](value: Either[A, A]): Option[A] = value match {
case scala.Left(x) => Some(x)
case scala.Right(x) => Some(x)
}
}
object Test {
(Left((0, 0)): Either[(Int, Int), (Int, Int)]) match {
case LeftOrRight(pair @ (a, b)) => a // false -Xlint warning: "extractor pattern binds a single value to a Product2 of type (Int, Int)"
}
(Left((0, 0)): Either[(Int, Int), (Int, Int)]) match {
case LeftOrRight((a, b)) => a // false -Xlint warning: "extractor pattern binds a single value to a Product2 of type (Int, Int)"
}
(Left((0, 0)): Either[(Int, Int), (Int, Int)]) match {
case LeftOrRight(a, b) => a // false -Xlint warning: "extractor pattern binds a single value to a Product2 of type (Int, Int)"
}
}
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