Extending existing data structure in Scala.

Posted by Lukasz Lew on Stack Overflow See other posts from Stack Overflow or by Lukasz Lew
Published on 2010-05-09T09:19:09Z Indexed on 2010/05/09 9:28 UTC
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Filed under:

scala

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scala-2.8

|

data-structures

I have a normal tree defined in Scala.

sealed abstract class Tree
case class Node (...) extends Tree
case class Leaf (...) extends Tree

Now I want to add a member variable to all nodes and leaves in the tree. Is it possible with extend keyword or do I have to modify the tree classes by adding [T]?

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