cont

suspend fun test() {
  cont<String, Int> {
    val x = Either.Right(1).bind()
    val y = Validated.Valid(2).bind()
    val z = Option(3).bind { "Option was empty" }
    x + y + z
  }.fold({ fail("Shift can never be the result") }, { it shouldBe 6 })

  cont<String, Int> {
    val x = Either.Right(1).bind()
    val y = Validated.Valid(2).bind()
    val z: Int = None.bind { "Option was empty" }
    x + y + z
  }.fold({ it shouldBe "Option was empty" }, { fail("Int can never be the result") })
}