def toggle_self.go

minebender-game@1.0.0.0 · proof_grid.bend:296

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

296def toggle_self.go(+flags: List<&2, T.Pos>, +p: T.Pos, +c: Bool,
297  e: {B.contains(flags, p) == c : Bool}) ->
298  {B.contains(G.toggle.go(c, flags, p), p) == Bool.not(c) : Bool}:
299  match c:
300    case True{}:
301      contains_remove_self(flags, p)
302    case False{}:
303      contains_cons_self(p, flags)