Just being impressed with Scala's DSL creation abilities

pythonWith.scala

object With {
  def apply[T <: { def enter(): T; def exit(): Unit}](obj:T)(block: (T) => Unit) {
    obj.enter()
    block(obj)
    obj.exit()
  }
}

class SomeClass {
  def enter() = { println("enter"); this }
  def exit() = { println("exit") }
  override def toString = "SomeClass instance"
}

With(new SomeClass()) { obj =>
  println(obj)
}