def tu_top
import bend-collections@1.0.0.0/src/math/f64.bend as F64import Base
import bend-collections@1.0.0.0/src/math/num.bend as N
import bend-collections@1.0.0.0/src/math/u64.bend as W
770def tu_top(isn: Bool) -> Result<&2, &2, N.NumError, W.U64>:
771 match isn:
772 case True{}:
773 Fail{N.BadDomain{}}
774 case False{}:
775 Fail{N.Overflow{}}