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# 快速查询入口
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<<Rust 语言圣经>> 既然自诩为 Rust 日常开发工具书，那就得有工具书的样子，如果没有了快速索引查询的功能，也就没有了灵魂。
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因此我们决定在这里提供一个对全书内容进行快速索引的途径。理论上来说，**你想查的任何东西在这里都可以快速的被找到并能进入相应的章节查看详细的介绍**。
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可能大家会有疑问，不是有站内搜索功能嘛？是的，但是尴尬的是：首先它不支持中文，其次就算支持了中文，也一样不好用，我们需要的是快速精准地找到内容而不是模糊的查询内容。
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# 索引列表 doing
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<a id="head"></a>
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| NN | NN | NN | NN | NN | NN | NN | NN | NN | NN | NN | NN |
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| :-------------: | :-----: | :-----: | :-----: | :-----: | :-----: | :-----: | :-----: | :-----: | :-----: | :-----: | :-----: |
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| [Sym](#sym) | [A](#a) | [B](#b) | [C](#c) | [D](#d) | [E](#e) | [F](#f) | [G](#g) | [H](#h) | [I](#i) | [J](#j) | [K](#k) |
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| [Cargo](#cargo) | [L](#l) | [M](#m) | [N](#n) | [O](#o) | [P](#p) | [Q](#q) | [R](#r) | [S](#s) | [T](#t) | [U](#u) | [V](#v) |
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| [W](#w) | [X](#x) | [Y](#y) | [Z](#z) |
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[bottom](#bottom)
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## Sym
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| 名称 | 关键字 | 简介 |
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| ------------------------------- | -------------- | ------------------------------------------------------------------------------------ |
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| [?] | 错误传播 | 用于简化错误传播 |
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| [()] | 单元类型 | 单元类型，无返回值 |
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| `!` : [1 函数] [2 类型] | 永不返回 | 永不返回 |
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| [&] | 引用 | 常规引用是一个指针类型，指向了对象存储的内存地址 |
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| [\*] | 解引用 | 解出引用所指向的值 |
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| [@] | 变量绑定 | 为一个字段绑定另外一个变量 |
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| `_` : [1 忽略变量] [2 模式匹配] | 忽略 | 1. 忽略该值或者类型，否则编译器会给你一个 `变量未使用的` 的警告<br>2. 模式匹配通配符 |
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| ['a: 'b] | 生命周期约束 | 用来说明两个生命周期的长短 |
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| [{:?}] {:#?} | 打印结构体信息 | 使用 `#[derive(Debug)]` 派生实现 `Debug` 特征 |
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| A | | AIntroduction |
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[?]: https://course.rs/basic/result-error/result.html#传播界的大明星-
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[()]: https://course.rs/basic/base-type/function.html#无返回值
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[1 函数]: https://course.rs/basic/base-type/function.html#永不返回的发散函数-
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[2 类型]: https://course.rs/advance/into-types/custom-type.html#永不返回类型
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[&]: https://course.rs/basic/ownership/borrowing.html#引用与解引用
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[\*]: https://course.rs/basic/ownership/borrowing.html#引用与解引用
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[@]: https://course.rs/basic/match-pattern/all-patterns.html#绑定
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['a: 'b]: https://course.rs/advance/lifetime/advance.html#生命周期约束-hrtb
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[{:?}]: https://course.rs/basic/compound-type/struct.html?search=#使用-derivedebug-来打印结构体的信息
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[1 忽略变量]: https://course.rs/basic/variable.html#使用下划线开头忽略未使用的变量
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[2 模式匹配]: https://course.rs/basic/match-pattern/match-if-let.html#_-通配符
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[back](#head)
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## A
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| 名称 | 关键字 | 简介 |
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| ------------- | -------- | ---------------------------------------------------------------------------------------------------------------------- |
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| [array 数组] | 数组 | 长度固定<br>元素必须有相同的类型<br>依次线性排列<br>可以通过索引访问其中的元素<br>`let a: [i32; 5] = [1, 2, 3, 4, 5];` |
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| [array slice] | 数组切片 | `let slice: &[i32] = &a[1..3];` |
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| A | KWA | AIntroduction |
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[array 数组]: https://course.rs/basic/compound-type/array.html
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[array slice]: https://course.rs/basic/compound-type/array.html#数组切片
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[back](#head)
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## B
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| 名称 | 关键字 | 简介 |
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| ------------ | --------- | ------------------------------------------------------------------------------ |
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| [变量遮蔽] | shadowing | 允许声明相同的变量名，后者会遮蔽掉前者 |
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| [变量覆盖] | 模式匹配 | 无论是是 `match` 还是 `if let`，他们都可以在模式匹配时覆盖掉老的值，绑定新的值 |
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| [变量作用域] | 所有权 | 作用域是一个变量在程序中有效的范围 |
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| [表达式] | | 进行求值，结尾无 `;`，有返回值 |
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| [bool 布尔] | 布尔类型 | `true` `false`，占用 1 字节 |
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| [break] | 循环控制 | 直接跳出当前整个循环 |
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| B | KWB | BIntroduction |
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[变量遮蔽]: https://course.rs/basic/variable.html#变量遮蔽shadowing
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[变量覆盖]: https://course.rs/basic/match-pattern/match-if-let.html#变量覆盖
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[变量作用域]: https://course.rs/basic/ownership/ownership.html#变量作用域
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[bool 布尔]: https://course.rs/basic/base-type/char-bool.html#布尔bool
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[表达式]: https://course.rs/basic/base-type/statement-expression.html#表达式
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[break]: https://course.rs/basic/flow-control.html#break
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[back](#head)
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## C
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| 名称 | 关键字 | 简介 |
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| ------------ | -------- | ----------------------------------------------------------------------------------- |
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| [char 字符] | 字符类型 | 使用 `''` 表示，所有的 Unicode 值 |
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| [const 常量] | constant | `const MAX_POINTS: u32 = 100_000;` |
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| [Copy 拷贝] | 浅拷贝 | 任何基本类型的组合可以 `Copy`，不需要分配内存或某种形式资源的类型是可以 `Copy` 的。 |
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| [continue] | 循环控制 | 跳过当前当次的循环，开始下次的循环 |
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| [Clone 克隆] | 深拷贝 | 需要复制堆上的数据时，可以使用 `.clone()` 方法 |
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| C | KWC | CIntroduction |
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[char 字符]: https://course.rs/basic/base-type/char-bool.html#字符类型char
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[const 常量]: https://course.rs/basic/variable.html#变量和常量之间的差异
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[copy 拷贝]: https://course.rs/basic/ownership/ownership.html#拷贝浅拷贝
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[clone 克隆]: https://course.rs/basic/ownership/ownership.html#克隆深拷贝
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[continue]: https://course.rs/basic/flow-control.html#continue
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[back](#head)
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## D
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| 名称 | 关键字 | 简介 |
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| ---- | ------ | ------------- |
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| D | KWD | DIntroduction |
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[back](#head)
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## E
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| 名称 | 关键字 | 简介 |
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| ----------- | -------- | ---------------------------------------- |
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| [enum 枚举] | 枚举类型 | 允许通过列举可能的成员来定义一个枚举类型 |
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| E | KWE | EIntroduction |
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[enum 枚举]: https://course.rs/basic/compound-type/enum.html#枚举
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[back](#head)
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## F
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| 名称 | 关键字 | 简介 |
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| ---------- | -------- | ---------------------------- |
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| [浮点数] | 数值类型 | `f32`<br>`f64`(默认类型) |
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| [for 循环] | 循环控制 | `for item in &collection {}` |
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| F | KWF | FIntroduction |
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[浮点数]: https://course.rs/basic/base-type/numbers.html#浮点类型
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[for 循环]: https://course.rs/basic/flow-control.html#for-循环
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[back](#head)
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## G
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| 名称 | 关键字 | 简介 |
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| ---- | ------ | ------------- |
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| G | KWG | GIntroduction |
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[back](#head)
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## H
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| 名称 | 关键字 | 简介 |
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| ------ | ------ | ------------------------------------------------------------------------------------------------- |
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| [函数] | `fn` | 函数名和变量名使用 `蛇形命名法(snake case)`<br>函数的位置可以随便放<br>每个函数参数都需要标注类型 |
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| H | KWH | HIntroduction |
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[函数]: https://course.rs/basic/base-type/function.html
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[back](#head)
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## I
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| 名称 | 关键字 | 简介 |
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| ------------- | -------- | --------------------------------------------------------------------- |
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| [if else] | 流程控制 | 根据条件执行不同的代码分支 |
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| [else if] | 流程控制 | 处理多重条件 |
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| [if let 匹配] | 模式匹配 | 当你只要匹配一个条件，且忽略其他条件时就用 `if let`，否则都用 `match` |
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| I | KWI | IIntroduction |
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[if else]: https://course.rs/basic/flow-control.html#使用-if-来做分支控制
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[else if]: https://course.rs/basic/flow-control.html#使用-else-if-来处理多重条件
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[if let 匹配]: https://course.rs/basic/match-pattern/match-if-let.html#if-let-匹配
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[back](#head)
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## J
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| 名称 | 关键字 | 简介 |
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| ---- | ------ | ------------- |
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| J | KWJ | JIntroduction |
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[back](#head)
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## K
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| 名称 | 关键字 | 简介 |
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| ---- | ------ | ------------- |
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| K | KWK | KIntroduction |
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[back](#head)
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## L
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| 名称 | 关键字 | 简介 |
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| ----------- | -------- | ------------------------------ |
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| [let] | 变量绑定 | `let x : u32 = 5;` |
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| [let mut] | 可变变量 | `let mut x : u32 = 5; x = 9;` |
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| [loop 循环] | 循环控制 | 无限循环，注意要配合 [`break`] |
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| L | KWL | LIntroduction |
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[let]: https://course.rs/basic/variable.html#变量绑定
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[let mut]: https://course.rs/basic/variable.html#变量可变性
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[`break`]: https://course.rs/basic/flow-control.html#break
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[loop 循环]: https://course.rs/basic/flow-control.html#loop-循环
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[back](#head)
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## M
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| 名称 | 关键字 | 简介 |
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| ------------- | ---------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
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| [模式绑定] | 模式匹配 | 从模式中取出绑定的值 |
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| [全模式列表] | 模式匹配 | 列出了所有的模式匹配 |
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| [match 匹配] | 模式匹配 | `match` 的匹配必须要穷举出所有可能，因此这里用 `_ ` 来代表未列出的所有可能性<br>`match` 的每一个分支都必须是一个表达式，且所有分支的表达式最终返回值的类型必须相同 |
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| [matches! 宏] | 模式匹配 | 将一个表达式跟模式进行匹配，然后返回匹配的结果 `true` 或 `false` |
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| [match guard] | 匹配守卫 | 位于 `match` 分支模式之后的额外 `if` 条件，它能为分支模式提供更进一步的匹配条件 |
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| [move 移动] | 转移所有权 | `let s2 = s1;`<br>`s1` 所有权转移给了 `s2`，`s1` 失效 |
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| M | KWM | MIntroduction |
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[模式绑定]: https://course.rs/basic/match-pattern/match-if-let.html#模式绑定
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[match 匹配]: https://course.rs/basic/match-pattern/match-if-let.html#match-匹配
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[matches! 宏]: https://course.rs/basic/match-pattern/match-if-let.html#matches宏
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[move 移动]: https://course.rs/basic/ownership/ownership.html#转移所有权
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[全模式列表]: https://course.rs/basic/match-pattern/all-patterns.html
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[match guard]: https://course.rs/basic/match-pattern/all-patterns.html#匹配守卫提供的额外条件
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[back](#head)
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## N
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| 名称 | 关键字 | 简介 |
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| ---- | ------ | ------------- |
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| N | KWN | NIntroduction |
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[back](#head)
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## O
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| 名称 | 关键字 | 简介 |
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| ------------- | ----------- | --------------------------------------------------------------- |
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| [Option] | Option 枚举 | 用于处理空值，**一个变量要么有值：`Some(T)`, 要么为空：`None`** |
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| [Option 解构] | 模式匹配 | 可以通过 `match` 来实现 |
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| O | KWO | OIntroduction |
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[option]: https://course.rs/basic/compound-type/enum.html#option-枚举用于处理空值
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[option 解构]: https://course.rs/basic/match-pattern/option.html#匹配-optiont
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[back](#head)
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## P
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| 名称 | 关键字 | 简介 |
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| ---- | ------ | ------------- |
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| P | KWP | PIntroduction |
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[back](#head)
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## Q
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| 名称 | 关键字 | 简介 |
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| ---- | ------ | ------------- |
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| Q | KWQ | QIntroduction |
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[back](#head)
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## R
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| 名称 | 关键字 | 简介 |
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| ------------ | ------ | ---------------------------------------------------------------------------------- |
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| [Range 序列] | | 生成连续的数值<br> 只允许用于数字或字符类型<br> `..` 右半开区间 <br>`..=` 闭合区间 |
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| R | KWR | RIntroduction |
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[range 序列]: https://course.rs/basic/base-type/numbers.html#序列range
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[back](#head)
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## S
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| 名称 | 关键字 | 简介 |
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| --------------- | ------------- | ------------------------------------------------------------------------------------------------------------------------ |
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| [所有权与堆栈] | | Rust 所有权提供的强大保障 |
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| [所有权原则] | | Rust 中每一个值都 `有且只有` 一个所有者(变量)<br> 当所有者(变量)离开作用域范围时，这个值将被丢弃(drop) |
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| [slice 切片] | `&str` | 允许你引用 `String` 中部分连续的元素序列，而不是引用整个 `String` <br>语法：`[开始索引..终止索引]`<br>字符串字面量是切片 |
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| [String 字符串] | `String` 类型 | Rust 中的字符串是 UTF-8 编码，也就是字符串中的字符所占的字节数是变化的(1 - 4) |
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| [String 操作] | `String` 方法 | 由于 `String` 是可变字符串，因此我们可以对它进行创建、增删操作 |
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| [String 转义] | `String` 方法 | 通过转义的方式 `\` 输出 ASCII 和 Unicode 字符 |
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| [struct 结构体] | 结构体 | 通过关键字 `struct` 定义<br>一个清晰明确的结构体 `名称`<br>几个有名字的结构体 `字段`<br>通过 `.` 访问字段 |
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| S | KWS | SIntroduction |
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[所有权与堆栈]: https://course.rs/basic/ownership/ownership.html#所有权与堆栈
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[所有权原则]: https://course.rs/basic/ownership/ownership.html#所有权原则
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[slice 切片]: https://course.rs/basic/compound-type/string-slice.html#切片slice
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[string 字符串]: https://course.rs/basic/compound-type/string-slice.html#什么是字符串
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[string 操作]: https://course.rs/basic/compound-type/string-slice.html#操作字符串
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[string 转义]: https://course.rs/basic/compound-type/string-slice.html#字符串转义
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[struct 结构体]: https://course.rs/basic/compound-type/struct.html
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[back](#head)
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## T
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| 名称 | 关键字 | 简介 |
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| -------------- | ---------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| [Tuple 元组] | | 由多种类型组合一起，元组的长度是固定的，元组中元素的顺序也是固定的<br>用模式匹配解构元组：`let (x, y, z) = (20, 19.2, 1)`<br>用 `.` 来访问元组：`tuple.0` 索引从 0 开始 |
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| [Tuple Struct] | 元组结构体 | 结构体必须要有名称，但字段可以没有名称<br>`struct Color(i32, i32, i32);` |
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| T | KWT | TIntroduction |
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[tuple 元组]: https://course.rs/basic/compound-type/tuple.html#元组
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[tuple struct]: https://course.rs/basic/compound-type/struct.html?search=#元组结构体tuple-struct
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[back](#head)
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## U
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| 名称 | 关键字 | 简介 |
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| ------------------ | ---------- | ------------------------------------------- |
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| [Unit-like Struct] | 单元结构体 | 没有任何字段和属性<br>`struct AlwaysEqual;` |
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| U | KWU | UIntroduction |
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[unit-like struct]: https://course.rs/basic/compound-type/struct.html?search=#单元结构体unit-like-struct
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[back](#head)
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## V
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| 名称 | 关键字 | 简介 |
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| ---- | ------ | ------------- |
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| V | KWV | VIntroduction |
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[back](#head)
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## W
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| 名称 | 关键字 | 简介 |
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| ------------ | -------- | ------------------------------------------------------ |
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| [while 循环] | 循环控制 | 当条件为 `true` 时，继续循环，条件为 `false`，跳出循环 |
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| W | KWW | WIntroduction |
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[while 循环]: https://course.rs/basic/flow-control.html#while-循环
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[back](#head)
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## X
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| 名称 | 关键字 | 简介 |
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| ---- | ------ | ------------- |
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| X | KWX | XIntroduction |
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[back](#head)
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## Y
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| 名称 | 关键字 | 简介 |
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| ------ | ------ | ---------------------------------------------------- |
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| [语句] | | 完成一个操作，结尾有 `;` ，无返回值，如 `let x = 9;` |
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| Y | KWY | YIntroduction |
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[语句]: https://course.rs/basic/base-type/statement-expression.html#语句
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[back](#head)
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## Z
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| 名称 | 关键字 | 简介 |
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| ------------ | -------- | ---------------------------------------------------------------------------------------------------------------- |
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| [整数] | 数值类型 | 有符号整数，`i8`，`i16`，`i32`，`i64`，`i128`，`isize`<br>无符号整数，`u8`，`u16`，`u32`，`u64`，`u128`，`usize` |
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| [整形字面量] | 进制书写 | 十进制 `98_222`<br>十六进制 `0xff`<br>八进制 `0o77`<br>二进制 `0b1111_0000`<br>字节(仅限于`u8`) `b'A'` |
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| Z | KWZ | ZIntroduction |
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[整数]: https://course.rs/basic/base-type/numbers.html#整数类型
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[整形字面量]: https://course.rs/basic/base-type/numbers.html#整数类型
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[back](#head)
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## Cargo
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| 名称 | 关键字 | 简介 |
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| ----- | ------ | -------------- |
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| Cargo | KWCG | CGIntroduction |
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[back](#head)
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<a id="bottom"></a>
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