law closed_use

minebender-game@1.0.0.0 · proof_inv.bend:45

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

45# In a closed grid, a revealed zero's neighbours are revealed.
46law closed_use:
47  for +w: Nat
48  for +h: Nat
49  for +layout: T.Grid(Bool)
50  for +g: T.Grid(Bool)
51  for c: {closed(w, h, layout, g) == True{} : Bool}
52  for +q: T.Pos
53  for on: {B.on_board(w, h, q) == True{} : Bool}
54  for gq: {B.at(Bool, False{}, g, q) == True{} : Bool}
55  for z: {B.zero(w, h, layout, q) == True{} : Bool}
56  for +r: T.Pos
57  for rm: {B.contains(B.neighbours(w, h, q), r) == True{} : Bool}
58  {B.at(Bool, False{}, g, r) == True{} : Bool}