law know_row_get

minebender-game@1.0.0.0 · proof_grid.bend:32

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

32law know_row_get:
33  for +w: Nat
34  for +h: Nat
35  for +layout: T.Grid(Bool)
36  for +shown: T.Grid(Bool)
37  for +y: Nat
38  for +xs: List<&2, Nat>
39  for +j: Nat
40  for +x: Nat
41  for e: {List.get(&2, Nat, xs, j) == Some{x} : Maybe<&2, Nat>}
42  {List.get(&2, T.Seen, G.know_row(w, h, layout, shown, y, xs), j)
43    == Some{G.seen_at(w, h, layout, shown, T.Pos{x, y})} : Maybe<&2, T.Seen>}