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Update advance.md #1346

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Update advance.md #1346

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Update advance.md
Scott169 Dec 17, 2023
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Merge branch 'sunface:main' into main
Scott169 Apr 20, 2024
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2 changes: 1 addition & 1 deletion src/advance/lifetime/advance.md
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Expand Up @@ -422,7 +422,7 @@ impl Reader for BufReader<'_> {
}
```

`'_` 生命周期表示 `BufReader` 有一个不使用的生命周期，我们可以忽略它，无需为它创建一个名称。
`'_` 称为匿名生命周期（anonymous lifetime），在这里表示 `BufReader` 有一个不使用的生命周期，我们可以忽略它，无需为它创建一个名称。

歪个楼，有读者估计会发问：既然用不到 `'a`，为何还要写出来？如果你仔细回忆下上一节的内容，里面有一句专门用粗体标注的文字：**生命周期参数也是类型的一部分**，因此 `BufReader<'a>` 是一个完整的类型，在实现它的时候，你不能把 `'a` 给丢了！

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