def checked

bend-collections@1.0.0.0 · src/crypto/blake/blake2s/blake2s.bend:197

import Base

197def checked(valid: Bool, a: Array<U32>, length: Nat) -> Maybe<&1,Array<U32>>:
198  match valid:
199    case False{}: None{}
200    case True{}: Some{digest(unchecked(a,length))}