atomic_enum rust 原子枚举类型

https://docs.rs/atomic_enum/latest/atomic_enum/

#[atomic_enum]
#[derive(PartialEq)]
enum CatState {
    Dead = 0,
    BothDeadAndAlive,
    Alive,
}

let state = AtomicCatState::new(CatState::Dead);
state.store(CatState::Alive, Ordering::Relaxed);

assert_eq!(state.load(Ordering::Relaxed), CatState::Alive);