Example Impl of FF7/BOTW Inventory in Rust

main.rs

#[derive(Debug)]
struct Player {
  state: State,
}

impl Player {
  fn new() -> Self {
    Self { state: PlayerCharacterInstance }
  }
  fn collect(&mut self, ability: Transition) {
    match (&self.state, power) {
      (&self.state, ItemPickup) => self.state = PlayerCharacterInstanceNewStateItemPickup(ItemPickup),
      (_, ItemPickupAntipattern) => self.state = PlayerCharacterInstanceNewStateItemPickupAntipattern(ItemPickupAntipattern),
      (_, ItemPickupTest) => {
        printl!("item picked up")
      }
    }
  }
}

fn main() {
  let mut player_instance = Player::new();
  player_instance.collect(ItemPickup);
  player_instance.collect(ItemPickupAntipattern);
  player_instance.collect(ItemPickupTest);
  assert!(player_instance.state == PlayerCharacterInstanceStateItemPickup);
}