entity.rs

struct Entity {
  pub id: usize,
  pub ver: usize,
}

impl Eq for Entity {
  fn eq(self, other: Entity) {
     return (self.id == other.id) && (self.ver == other.ver);
  }
}

// the point of ver is that if we reuse an id, and a new one is allocated on the server
// with the same id as an old one that still is being used on the local world
// then the ver of the one on the server will be different because we keep track of the versions in a hashmap
// on the server, i guess?