# port.ludic - what the rail asks the game. Unbound: nothing is ever true, and the rail may show.
export port HintsWorld {
  true_now: fn(int) -> bool = fn hn_never     # is card i true right now? Pure and cheap: asked once a pass
  showing: fn() -> bool = fn hn_yes           # the rail is wanted (in play, the player's switch on)
}

function hn_never(i: int) -> bool { return false }
function hn_yes() -> bool { return true }