stanch

/* Basic example */
@workflow[List] val x = List(1, 2) * List(4, 5)

/* Using @context */
@context[Option] val x = {
  $(Some(42) + 1) should equal (Some(43))
  $(Some(10) + Some(5) * Some(2)) should equal (Some(20))
}

@context[List] val x = {