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Tags
#odersky-programming-in-scala-2ed #scala
Question
How come an abstract method can call super? It would certainly fall for classes. 

trait Doubling extends IntQueue {
  abstract override def put(x: Int) { super.put(2 * x) }
}
Answer
Since super calls in a trait are dynamically bound, the super call in trait Doubling will work so long as the trait is mixed in after another trait or class that gives a concrete definition to the method.

Tags
#odersky-programming-in-scala-2ed #scala
Question
How come an abstract method can call super? It would certainly fall for classes. 

trait Doubling extends IntQueue {
  abstract override def put(x: Int) { super.put(2 * x) }
}
Answer
?

Tags
#odersky-programming-in-scala-2ed #scala
Question
How come an abstract method can call super? It would certainly fall for classes. 

trait Doubling extends IntQueue {
  abstract override def put(x: Int) { super.put(2 * x) }
}
Answer
Since super calls in a trait are dynamically bound, the super call in trait Doubling will work so long as the trait is mixed in after another trait or class that gives a concrete definition to the method.
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statusnot learnedmeasured difficulty37% [default]last interval [days]               
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