-/// When available, make plays that grant momentum. Otherwise, play randomly.
-pub fn momentum_player(draw_chance: f64) -> impl FnMut(&Game) -> Play {
- let mut fallback = random_player(draw_chance);
- move |game: &Game| -> Play {
- match (&game.phase, game.discard.top().and_then(Card::suit)) {
- (Phase::Play, Some(suit)) => {
- match game.current_player_hand().filter_by_suit(suit).random() {
- Some(card) => Play::Play(*card),
- _ => fallback(game),
+/// When available, make plays that grant momentum.
+#[must_use]
+pub fn momentum_player(mut fallback: Player) -> Player {
+ Player(Box::new(move |game: &Game| -> Play {
+ if game.phase == Phase::Play {
+ if let Some(suit) = game.discard.top().and_then(Card::suit) {
+ if let Some(card) = game.current_player_hand().filter_by_suit(suit).random() {
+ return Play::Play(*card);