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Update Ch21
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@ -199,4 +199,8 @@ fn main() {
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| `br"..."`, `br#"..."`, `br##"..."##` 等等 | 原始字节字符串字面值,是原始与字节字符串字面值的结合 |
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| `'...'` | 字符字面值 |
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| `b'...'` | ASCII 字节字面值 |
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| <code>|...| expr</code> | 闭包 |
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| `!` | 发散函数下总是空的底部类型,always empty bottom type for diverging functions |
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| `_` | “忽略,ignored” 模式绑定;还用于令到整数字面值可读,also used to make integer literals readable |
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