def dig.low

emerging-eztoml@0.9.0.0 · main.bend:447

import Base

447# a lowercase hex digit, otherwise an uppercase one
448def dig.low(ok: Bool, +uu: U32) -> U32:
449  match ok:
450    case True{}:
451      U32.sub(uu, 87)
452    case False{}:
453      dig.up(Bool.and(U32.is_ge(uu, 65), U32.is_le(uu, 70)), uu)