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object Test {
def main(args:Array[String]) = {
Foo.run
Mas.run
}
}
object Foo {
def unapply(x: Any): Option[Product2[Int, String]] = x match {
case y: Bar => Some(Tuple(y.size, y.name))
case _ => None
}/*
// ERROR: test/pending/pos/unapply.scala:6 error: method unapply is defined twice
def unapply(x: Any): Option[Product1[String]] = x match {
case y: Bar => Some(Tuple(y.name))
case _ => None
}*/
def run: Unit = {
val b = new Bar
b match {
case Foo(s:Int, n:String) => Console.println("size "+s+" name "+n)
}
b.size = 54
b.name = "large"
b match {
case Foo(s:Int, n:String) => Console.println("size "+s+" name "+n)
}/*
b match {
case Foo(n) => Console.println("name " + n)
}*/
}
}
class Bar {
var size: Int = 50
var name: String = "medium"
}
object Mas {
object Gaz {
def unapply(x: Any): Option[Product2[Int, String]] = x match {
case y: Baz => Some(Tuple(y.size, y.name))
case _ => None
}
}
class Baz {
var size: Int = 60
var name: String = "too large"
}
def run: Unit = {
val b = new Baz
b match {
case Gaz(s:Int, n:String) => Console.println("size "+s+" name "+n)
}
}
}
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