class X(val elem: Int) extends Object {
  def foo(y: String): Int = y.length + elem
}

object Functions {

  object simple {
    val x = new X(2)
    val xe = x.elem
    val xf: String => Int = x.foo(_: String)
    val xf2: String => Int = x.foo(_)
    val x2: String => Int = x.foo
    val x3 = x.foo _
  }

  object sams {
    abstract class Spore[T, U] {
      def run(x: T): U
    }

    trait Spore2[T, U] { self: Spore2[T, U] =>
      def run(x: T): U
    }

    val x33: String => String = x22 => x22 match {
      case "abc" => ""
      case x34 => x34
    }
    val y: PartialFunction[String, String] = x => x match {
      case "abc" => ""
      case _ => x
    }
    val z: Spore[String, String] = x => x + x
    val z2: Spore2[String, String] = x => x + x
  }
}