Can I make "public val" but "private var" in Scala in one line?

Question

I.e. Is it possible to make a var that is not assignable from outside of the class ?

Answer 1

Right now, no, there's no way to do that.

You're limited to the following three-line solution:

class Hider {
  private[this] var xHidden: Int = 0
  def x = xHidden
  private def x_=(x0: Int) { xHidden = x0 }
}

Now the class itself is the only one who can manipulate the underlying field xHidden, while other instances of the class can use the setter method and everyone can see the getter method.

If you don't mind using different names, you can just make the var private and forget the setter (two lines).

There's no "var to me, val to them" keyword.