Mona-d-emo

gistfile1.txt

object Monademo extends App {
  val f = new Foo("foo")
  val br = new Bar(f)
  val bs = new Bas(br)

  def evalBas(bs: Bas) = {
    for {
      b <- bs.getBar
      c <- b.getFoo
    } yield c.getName
  }
  
  
  println(evalBas(bs).getOrElse("No Foo"))
}

class Foo(name: String) {
  def getName = name
}

class Bar(foo: Foo) {
  def getFoo = Some(foo)
}

class Bas(bar: Bar) {
  def getBar = Some(bar)
}