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trait Break {
protected val break: Int;
}
case class BreakImpl(protected val break: Int) extends Break { }
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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