Question

I have the following code in Scala Play Framework:

  case class Step(name: String, f: Unit) {
    def run = {() => f}
  }

The compiler gives me a strange warning about

comparing values of type Unit and Unit using '==' will always yield true

Answer 1

It’s because case classes define an == method for you, which compares each of the fields in the case class. So Step("a", println("1")) == Step("a", println("2")) is true even thought the Unit functions aren’t the same.