type gist

type gist.scala

sealed trait Callable[T] {
  def call(): T
}

object Caller {
  def call[C, A <: Callable[C]](callable: A): C = {
    callable.call()
  }
}

case class Duck(name: String) extends Callable[String] {
  def call(): String = {
    "quack"
  }
}

val duck = Duck("Donald")



println(Caller.call[String, Duck](duck))