law contains_append

minebender-game@1.0.0.0 · proof_cells.bend:60

import Base
import minebender-game@1.0.0.0/types.bend as T
import minebender-game@1.0.0.0/board.bend as B

60law contains_append:
61  for +xs: List<&2, T.Pos>
62  for +ys: List<&2, T.Pos>
63  for +q: T.Pos
64  {B.contains(List.append(&2, T.Pos, xs, ys), q) == Bool.or(B.contains(xs, q), B.contains(ys, q)) : Bool}