Scala traits composition and method overriding

TraitsTest.scala

object TraitsTest {

  trait Base {
    def func() = println("Base.func")
  }

  trait A extends Base {
    override def func() = { super.func(); println("A.func") }
  }

  trait B extends Base {
    override def func() = { super.func(); println("B.func") }
  }

  class MyClass1 extends A with B { println("Constructing MyClass1") }
  class MyClass2 extends B with A { println("Constructing MyClass2") }

  def main(args: Array[String]) {
    (new MyClass1).func() // --> Constructing MyClass1, Base.func, A.func, B.func
    (new MyClass2).func() // --> Constructing MyClass2, Base.func, B.func, A.func
  }

}

http://stackoverflow.com/questions/1836060/cant-extend-two-traits-that-have-a-method-with-the-same-signature

Scala's Stackable Trait Pattern
http://www.artima.com/scalazine/articles/stackable_trait_pattern.html