Some fixes in async and tokio chapter #376
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helloall1900
changed the title
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February 5, 2022 15:43
sunface
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Feb 7, 2022
| @@ -147,7 +147,7 @@ pin_mut!(t1, t2); | |||
| 首先，`.fuse()`方法可以让 `Future` 实现 `FusedFuture` 特征， 而 `pin_mut!` 宏会为 `Future` 实现 `Unpin`特征，这两个特征恰恰是使用 `select` 所必须的: | |||
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| - `Unpin`，由于 `select` 不会通过拿走所有权的方式使用`Future`，而是通过可变引用的方式去使用，这样当 `select` 结束后，该 `Future` 若没有被完成，它的所有权还可以继续被其它代码使用。 | |||
| - `FusedFuture`的原因跟上面类似，当 `Future` 一旦完成后，那 `select` 就不能再对其进行轮询使用。`Fuse`意味着融化的意思，相当于 `Future` 一旦完成，就融化了，无法再被使用。 | |||
| - `FusedFuture`的原因跟上面类似，当 `Future` 一旦完成后，那 `select` 就不能再对其进行轮询使用。`Fuse`意味着熔断，相当于 `Future` 一旦完成，再次调用`poll`会直接返回`Poll::Pending`。 | |||
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