def checked

bend-collections-laws-crypto@1.0.0.0 · spec/math/generic.bend:70

import Base
import bend-collections-laws-crypto@1.0.0.0/src/math/num.bend as N

70# n as a T, or Overflow when it needs more than w bits
71def checked(~T: Data, ~of: Nat -> T, +w: Nat, +n: Nat) -> Result<&2, &2, N.NumError, T>:
72  checked_pick(~T, ~of, n, fits(w, n))