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// this is a slight negative twist on run/t3714.scala.
trait Break {
protected val break: Int;
}
class BreakImpl(protected val break: Int) extends Break { }
object BreakImpl {
def apply(x: Int): Break = new BreakImpl(x)
def unapply(x: Any) = x match {
case x: BreakImpl => Some(x.break)
case _ => None
}
}
object Test {
def f1(x: Break) = x match {
case b: BreakImpl => b.break
case b => -1
}
def f2(x: Break) = x match {
case BreakImpl(x) => x
case _ => -1
}
def f3(x: Any) = x match {
case b: BreakImpl => b.break
case b => -1
}
def f4(x: Any) = x match {
case BreakImpl(x) => x
case _ => -1
}
def main(args: Array[String]) {
val break = BreakImpl(22)
assert(f1(break) == 22)
assert(f2(break) == 22)
assert(f3(break) == 22)
assert(f4(break) == 22)
}
}
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