Pass constant to super constructor

Question

How can I pass a constant from a sub class to a super constructor? Something like:

class SubClass extends SuperClass(Const) {
    val Const = ...
}

user_9128490 · Answer

Constants are usually placed in companion objects, so you can do it as follows:

class SubClass extends SuperClass(SubClass.Const)

object SubClass {
  val Const = ...
}