Beginner: Scala type alias in Scala 2.10?

Question

Why does this code fail to compile with the error: not found: value Matrix? From the documentation and some (possibly out of date) code examples this should work?

Answer 1

From this article you have.

Note also that along with most of the type aliases in package scala comes a value alias of the same name. For instance, there's a type alias for the List class and a value alias for the List object.

A solution to the problem translates to:

object TestMatrix extends App{  
  type Row = List[Int]
  val Row = List
  type Matrix = List[Row]
  val Matrix = List

  val m = Matrix( Row(1,2,3),
                  Row(1,2,3),
                  Row(1,2,3))
}