def checked

bend-collections-laws-crypto@1.0.0.0 · src/crypto/blake/blake2b/blake2b.bend:318

import Base

318def checked(valid: Bool, a: Array<U32>, length: Nat) -> Maybe<&1,Array<U32>>:
319  match valid:
320    case False{}: None{}
321    case True{}: Some{digest(unchecked(a,length))}