Trait Guarded 

pub trait Guarded: Send + Sync {
    // Required method
    fn guard(&self) -> &Guard;
}

把 Guard 从应用状态里取出来。

实现它只需要指向一个字段。适配层据此提供各框架的提取器 / 守卫。

Guard 自身与 Arc<Guard> 已经实现了它，所以「状态就是一把守卫」这种 最小场景不需要写任何代码。

Required Methods

fn guard(&self) -> &Guard

取出守卫。永远成功 —— 取不到说明状态装配错了，那是编译期该发现的事。

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl Guarded for Arc<Guard>

fn guard(&self) -> &Guard

Implementors

impl Guarded for Guard