law disp_row_get

minebender-game@1.0.0.0 · proof_display.bend:14

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

14law disp_row_get:
15  for +w: Nat
16  for +h: Nat
17  for +layout: T.Grid(Bool)
18  for +shown: T.Grid(Bool)
19  for +flags: List<&2, T.Pos>
20  for +st: T.Status
21  for +y: Nat
22  for +xs: List<&2, Nat>
23  for +j: Nat
24  for +x: Nat
25  for e: {List.get(&2, Nat, xs, j) == Some{x} : Maybe<&2, Nat>}
26  {List.get(&2, T.Tile, G.disp_row(w, h, layout, shown, flags, st, y, xs), j)
27    == Some{G.tile_at(w, h, layout, shown, flags, st, T.Pos{x, y})} : Maybe<&2, T.Tile>}