def is_nil

bend-collections-laws-crypto@1.0.0.0 · spec/crypto/blake/blake3.bend:229

import Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/blake/blake3/types.bend as T

229def is_nil(xs: List<&2,T.Out>) -> Bool:
230  match xs:
231    case Nil{}: True{}
232    case Con{x,r}: False{}