Protected functions in Scala

Question

How do you make a protected function in a class accessible to just all classes in the package in Scala?

Answer 1

You can do

protected[packagename] def foo() {...}

Answer 2

If we pay attention to the distinction between function and method, we can define an object deriving from Function:

protected[packagename] object fn extends (Int=>Int) {
  def apply(n: Int) = 2*n 
}