def Nar.read.split
import bend-kit-int@0.2.0.0/int.bend as Intimport Base
565def Nar.read.split(+r: U32, +m: U32, p: Bool & String) -> Maybe<&2, U32>:
566 (neg, t) = p
567 match neg:
568 case True{}:
569 None{}
570 case False{}:
571 Nar.read.u(r, m, t)