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# 附录 F：
不可否认，
| 难点及链接 | 简介 |
|----- | ------ |
| [? ](https://course.rs/basic/result-error/result.html#传播界的大明星- ) | 用于简化错误传播 |
| [() ](https://course.rs/basic/base-type/function.html#无返回值 ) | 单元类型 |
| `!` : [1 ](https://course.rs/basic/base-type/function.html#永不返回的函数 ), [2 ](https://course.rs/advance/into-types/custom-type.html#永不返回类型 ) | 永不返回 |
| [@ ](https://course.rs/basic/match-pattern/all-patterns.html#绑定 ) | 为一个字段绑定另外一个变量 |
| ['a: 'b ](https://course.rs/advance/lifetime/advance.html#生命周期约束-hrtb ) | 生命周期约束 |
