def List.is_empty
import Base957def List.is_empty(a, -A: Kind(a), xs: List<a, A>) -> Bool:
958 match xs:
959 case Nil{}:
960 True{}
961 case h <> t:
962 False{}
import Base957def List.is_empty(a, -A: Kind(a), xs: List<a, A>) -> Bool:
958 match xs:
959 case Nil{}:
960 True{}
961 case h <> t:
962 False{}