def u32.lead
import bend-kit-json@0.7.0.0/json.bend as Jsonimport Base
959def u32.lead(+c: U32, t: String, zero: Bool) -> Maybe<&2, U32>:
960 match zero:
961 case True{}:
962 u32.zero(t)
963 case False{}:
964 u32.dig(t, (c - 48 : U32), Bool.or(Bool.not(digit(c)), u32.over(0, c)))