def Iso8601.per.valid2
import bend-time-lib@0.4.0.1/iso8601.bend as Iso8601import Base
import bend-time-lib@0.4.0.1/period.bend as Per
562def Iso8601.per.valid2(
563 y: U32, m: U32, d: U32, ok: Bool
564) -> Result<&2, &2, Iso8601.Error, Per.Period>:
565 match ok:
566 case False{}:
567 Fail{Invalid{}}
568 case True{}:
569 Iso8601.per.mk2(Per.Period.from(y, m, d))