def assist_mono.safe

minebender-game@1.0.0.0 · proof_laws.bend:433

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

433def assist_mono.safe(+g: G.Game, +q: T.Pos, s: {B.at(Bool, False{}, shown_of(g), q) == True{} : Bool},
434  +m: Maybe<&2, T.Pos>) -> {B.at(Bool, False{}, shown_of(G.assist.safe(m, g)), q) == True{} : Bool}:
435  match m:
436    case None{}:
437      s
438    case Some{p}:
439      open_mono(g, p, q, s)