def Iso8601.per.seek
import bend-time-lib@0.4.0.1/iso8601.bend as Iso8601import Base
750def Iso8601.per.seek(
751 off: Nat, st: Iso8601.PerS, h: Char, is_t: Bool, is_dig: Bool
752) -> Iso8601.PerC:
753 match is_t:
754 case True{}:
755 PerFail{Invalid{}}
756 case False{}:
757 Iso8601.per.seek2(off, st, h, is_dig)