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import scala.reflect.ClassTag
trait Trees {
class Tree
implicit val ttTag: ClassTag[TypeTree]
type TypeTree <: Tree
val TypeTree: TypeTreeExtractor
abstract class TypeTreeExtractor {
def unapply(t: TypeTree): Option[String]
}
def test(tree: Tree) =
tree match {
case TypeTree(_) => println("lolwut")
case null => println("correct")
}
}
object Test extends App with Trees {
val ttTag = implicitly[ClassTag[TypeTree]]
case class TypeTree(meh: String) extends Tree
object TypeTree extends TypeTreeExtractor
test(null) // should not crash
}
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