def app

bend-collections-laws-math@1.0.0.0 · proofs/math/random/chacha8/stream.bend:14

import Base
import bend-collections-laws-math@1.0.0.0/src/math/u64.bend as W

14def app(xs: List<&2, W.U64>, ys: List<&2, W.U64>) -> List<&2, W.U64>:
15  match xs:
16    case Nil{}:
17      ys
18    case Con{x, rest}:
19      Con{x, app(rest, ys)}