fix none head anchor
This commit is contained in:
Jie Liang
@ -5,7 +5,7 @@
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> 声明语法
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>
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> declaration {#declaration}
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> ###### declaration {#declaration}
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>
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> *声明* → [*导入声明*](#import-declaration)
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>
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@ -35,7 +35,7 @@
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>
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> *声明* → [*运算符声明*](#operator-declaration)
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>
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> declarations {#declarations}
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> ###### declarations {#declarations}
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>
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> *多条声明* → [*声明*](#declaration) [*多条声明*](#declarations)<sub>可选</sub>
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>
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@ -61,7 +61,7 @@ Swift 的源文件中的顶级代码（top-level code）由零个或多个语句
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> 代码块语法
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>
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> code-block {#code-block}
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> ###### code-block {#code-block}
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>
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> *代码块* → **{** [*多条语句*](./05_Statements.md#statements)<sub>可选</sub> **}**
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>
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@ -80,22 +80,22 @@ import 导入类型 模块.符号名
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import 模块.子模块
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```
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grammer_of_an_import_declaration {#grammer_of_an_import_declaration}
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###### {#grammer_of_an_import_declaration}
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> 导入声明语法
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>
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> import-declaration {#import-declaration}
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> ###### import-declaration {#import-declaration}
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>
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> *导入声明* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> **import** [*导入类型*](#import-kind)<sub>可选</sub> [*导入路径*](#import-path)
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>
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> import-kind {#import-kind}
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> ###### import-kind {#import-kind}
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>
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> *导入类型* → **typealias** | **struct** | **class** | **enum** | **protocol** | **let** | **var** | **func**
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>
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> import-path {#import-path}
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> ###### import-path {#import-path}
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>
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> *导入路径* → [*导入路径标识符*](#import-path-identifier) | [*导入路径标识符*](#import-path-identifier) **.** [*导入路径*](#import-path)
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>
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> import-path-identifier {#import-path-identifier}
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> ###### import-path-identifier {#import-path-identifier}
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>
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> *导入路径标识符* → [*标识符*](./02_Lexical_Structure.md#identifier) | [*运算符*](./02_Lexical_Structure.md#operator)
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>
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@ -132,22 +132,22 @@ print("The second number is \(secondNumber).")
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如果还想获得更多关于常量的信息或者想在使用中获得帮助，请参阅 [常量和变量](../chapter2/01_The_Basics.md#constants_and_variables) 和 [存储属性](../chapter2/10_Properties.md#stored_properties)。
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grammer_of_a_constant_declaration {#grammer_of_a_constant_declaration}
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###### {#grammer_of_a_constant_declaration}
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> 常量声明语法
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>
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> constant-declaration {#constant-declaration}
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> ###### constant-declaration {#constant-declaration}
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>
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> *常量声明* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [*声明修饰符列表*](#declaration-modifiers)<sub>可选</sub> **let** [*模式构造器列表*](pattern-initializer-list)
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>
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> pattern-initializer-list {#pattern-initializer-list}
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> ###### pattern-initializer-list {#pattern-initializer-list}
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>
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> *模式构造器列表* → [*模式构造器*](#pattern-initializer) | [*模式构造器*](#pattern-initializer) **,** [*模式构造器列表*](#pattern-initializer-list)
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>
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> pattern-initializer {#pattern-initializer}
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> ###### pattern-initializer {#pattern-initializer}
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>
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> *模式构造器* → [*模式*](./08_Patterns.md#pattern) [*构造器*](#initializer)<sub>可选</sub>
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>
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> initializer {#initializer}
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> ###### initializer {#initializer}
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>
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> *构造器* → **=** [*表达式*](./04_Expressions.md#expression)
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>
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@ -242,10 +242,10 @@ var 变量名称: 类型 = 表达式 {
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> 在一个类声明中，使用关键字 `static` 与同时使用 `class` 和 `final` 去标记一个声明的效果相同。
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>
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grammer_of_a_variable_declaration {#grammer_of_a_variable_declaration}
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###### {#grammer_of_a_variable_declaration}
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> 变量声明语法
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>
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variable-declaration {#variable-declaration}
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###### {#variable-declaration}
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> *变量声明* → [*变量声明头*](#variable-declaration-head) [*模式构造器列表*](#pattern-initializer-list)
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>
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> *变量声明* → [*变量声明头*](#variable-declaration-head) [*变量名称*](#variable-name) [*类型标注*](03_Types.md#type-annotation) [*代码块*](#code-block)
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@ -259,58 +259,58 @@ variable-declaration {#variable-declaration}
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> *变量声明* → [*变量声明头*](#variable-declaration-head) [*变量名称*](#variable-name) [*类型标注*](03_Types.md#type-annotation) [*构造器*](#initializer)<sub>可选</sub> [*willSet-didSet 代码块*](#willSet-didSet-block)
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>
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variable-declaration-head {#variable-declaration-head}
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###### {#variable-declaration-head}
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> *变量声明头* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [*声明修饰符列表*](#declaration-modifiers)<sub>可选</sub> **var**
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>
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> variable-name {#variable-name}
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> ###### variable-name {#variable-name}
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>
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> *变量名称* → [*标识符*](./02_Lexical_Structure.md#identifier)
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>
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getter-setter-block {#getter-setter-block}
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###### {#getter-setter-block}
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> *getter-setter 代码块* → [*代码块*](#code-block)
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>
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> *getter-setter 代码块* → **{** [*getter 子句*](#getter-clause) [*setter 子句*](#setter-clause)<sub>可选</sub> **}**
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>
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> *getter-setter 代码块* → **{** [*setter 子句*](#setter-clause) [*getter 子句*](#getter-clause) **}**
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>
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> getter-clause {#getter-clause}
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> ###### getter-clause {#getter-clause}
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>
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> *getter 子句* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> **get** [*代码块*](#code-block)
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>
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> setter-clause {#setter-clause}
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> ###### setter-clause {#setter-clause}
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>
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> *setter 子句* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> **set** [*setter 名称*](#setter-name)<sub>可选</sub> [*代码块*](#code-block)
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>
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> setter-name {#setter-name}
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> ###### setter-name {#setter-name}
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>
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> *setter 名称* → **(** [*标识符*](./02_Lexical_Structure.md#identifier) **)**
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>
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getter-setter-keyword-block {#getter-setter-keyword-block}
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###### {#getter-setter-keyword-block}
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> *getter-setter 关键字代码块* → **{** [*getter 关键字子句*](#getter-keyword-clause) [*setter 关键字子句*](#setter-keyword-clause)<sub>可选</sub> **}**
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>
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> *getter-setter 关键字代码块* → **{** [*setter 关键字子句*](#setter-keyword-clause) [*getter 关键字子句*](#getter-keyword-clause) **}**
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>
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> getter-keyword-clause {#getter-keyword-clause}
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> ###### getter-keyword-clause {#getter-keyword-clause}
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>
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> *getter 关键字子句* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> **get**
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>
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> setter-keyword-clause {#setter-keyword-clause}
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> ###### setter-keyword-clause {#setter-keyword-clause}
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>
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> *setter 关键字子句* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> **set**
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>
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willSet-didSet-block {#willSet-didSet-block}
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###### {#willSet-didSet-block}
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> *willSet-didSet 代码块* → **{** [*willSet 子句*](#willSet-clause) [*didSet 子句*](#didSet-clause)<sub>可选</sub> **}**
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>
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> *willSet-didSet 代码块* → **{** [*didSet 子句*](#didSet-clause) [*willSet 子句*](#willSet-clause)<sub>可选</sub> **}**
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>
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> willSet-clause {#willSet-clause}
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> ###### willSet-clause {#willSet-clause}
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>
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> *willSet 子句* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> **willSet** [*setter 名称*](#setter-name)<sub>可选</sub> [*代码块*](#code-block)
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>
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> didSet-clause {#didSet-clause}
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> ###### didSet-clause {#didSet-clause}
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>
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> *didSet 子句* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> **didSet** [*setter 名称*](#setter-name)<sub>可选</sub> [*代码块*](#code-block)
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>
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@ -370,19 +370,19 @@ func sum<T: Sequence>(_ sequence: T) -> Int where T.Element == Int {
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另请参阅 [协议关联类型声明](#protocol_associated_type_declaration)。
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grammer_of_a_type_alias_declaration {#grammer_of_a_type_alias_declaration}
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###### {#grammer_of_a_type_alias_declaration}
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> 类型别名声明语法
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>
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>
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> typealias-declaration {#typealias-declaration}
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> ###### typealias-declaration {#typealias-declaration}
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>
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> *类型别名声明* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [*访问级别修饰符*](#access-level-modifier)<sub>可选</sub> **typealias** [*类型别名名称*](#typealias-name) [*类型别子句*](#typealias-clause) [*类型别名赋值*](#typealias-assignment)
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>
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> typealias-name {#typealias-name}
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> ###### typealias-name {#typealias-name}
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>
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> *类型别名名称* → [*标识符*](./02_Lexical_Structure.md#identifier)
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>
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> typealias-assignment {#typealias-assignment}
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> ###### typealias-assignment {#typealias-assignment}
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>
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> *类型别名赋值* → **=** [*类型*](./03_Types.md#type)
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>
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@ -570,46 +570,46 @@ Swift 定义了 `Never` 类型，它表示函数或者方法不会返回给它
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你可以重写一个不归方法，但是新的方法必须保持原有的返回类型和没有返回的行为。
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grammer_of_a_function_declaration {#grammer_of_a_function_declaration}
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###### {#grammer_of_a_function_declaration}
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> 函数声明语法
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>
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function-declaration {#function-declaration}
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###### {#function-declaration}
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> *函数声明* → [*函数头*](#function-head) [*函数名*](#function-name) [*泛型形参子句*](08_Generic_Parameters_and_Arguments.md#generic-parameter-clause)<sub>可选</sub> [*函数签名*](#function-signature) [*泛型 where 子句*](08_Generic_Parameters_and_Arguments.md#generic-where-clause) [*函数体*](#function-body)<sub>可选</sub>
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>
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function-head {#function-head}
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###### {#function-head}
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> *函数头* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [*声明修饰符列表*](#declaration-modifiers)<sub>可选</sub> **func**
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>
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> function-name {#function-name}
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> ###### function-name {#function-name}
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>
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> *函数名* → [*标识符*](./02_Lexical_Structure.md#identifier) | [*运算符*](./02_Lexical_Structure.md#operator)
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>
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>
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> function-signature {#function-signature}
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> ###### function-signature {#function-signature}
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>
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>
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> *函数签名* → [*参数子句列表*](#parameter-clauses) **throws**<sub>可选</sub> [*函数结果*](#function-result)<sub>可选</sub>
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>
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> *函数签名* → [*参数子句列表*](#parameter-clauses) **rethrows** [*函数结果*](#function-result)<sub>可选</sub>
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>
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> function-result {#function-result}
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> ###### function-result {#function-result}
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>
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> *函数结果* → **->** [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [*类型*](./03_Types.md#type)
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>
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> function-body {#function-body}
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> ###### function-body {#function-body}
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>
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> *函数体* → [*代码块*](#code-block)
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>
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> parameter-clause {#parameter-clause}
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> ###### parameter-clause {#parameter-clause}
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>
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> *参数子句* → **(** **)** | **(** [*参数列表*](#parameter-list) **)**
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>
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> parameter-list {#parameter-list}
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> ###### parameter-list {#parameter-list}
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>
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> *参数列表* → [*参数*](#parameter) | [*参数*](#parameter) **,** [*参数列表*](#parameter-list)
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>
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> parameter {#parameter}
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> ###### parameter {#parameter}
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>
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> *参数* → [*外部参数名*](#external-parameter-name)<sub>可选</sub> [*内部参数名*](#local-parameter-name) [*类型标注*](03_Types.md#type-annotation) [*默认参数子句*](#default-argument-clause)<sub>可选</sub>
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>
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@ -617,15 +617,15 @@ function-head {#function-head}
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>
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> *参数* → [*外部参数名*](#external-parameter-name)<sub>可选</sub> [*内部参数名*](#local-parameter-name) [*类型标注*](03_Types.md#type-annotation) **...**
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>
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> external-parameter-name {#external-parameter-name}
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> ###### external-parameter-name {#external-parameter-name}
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>
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> *外部参数名* → [*标识符*](./02_Lexical_Structure.md#identifier) | **_**
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>
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> local-parameter-name {#local-parameter-name}
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> ###### local-parameter-name {#local-parameter-name}
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>
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> *内部参数名* → [*标识符*](./02_Lexical_Structure.md#identifier) | **_**
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>
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> default-argument-clause {#default-argument-clause}
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> ###### default-argument-clause {#default-argument-clause}
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>
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> *默认参数子句* → **=** [*表达式*](./04_Expressions.md#expression)
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>
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@ -731,11 +731,11 @@ enum GamePlayMode: String {
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可以使用 `switch` 语句来检验枚举用例的值，正如 [使用 switch 语句匹配枚举值](../chapter2/08_Enumerations.md#matching_enumeration_values_with_a_switch_statement) 所述。枚举类型是模式匹配的，依靠 `switch` 语句 `case` 块中的枚举用例模式，正如 [枚举用例模式](./08_Patterns.md#enumeration_case_pattern) 所述。
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grammer_of_an_enumeration_declaration {#grammer_of_an_enumeration_declaration}
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###### {#grammer_of_an_enumeration_declaration}
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> 枚举声明语法
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>
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>
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> enum-declaration {#enum-declaration}
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> ###### enum-declaration {#enum-declaration}
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>
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> *枚举声明* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [*访问级别修饰符*](#access-level-modifier)<sub>可选</sub> [*联合风格枚举*](#union-style-enum)
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>
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@ -744,65 +744,65 @@ grammer_of_an_enumeration_declaration {#grammer_of_an_enumeration_declaration}
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>
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> *联合风格枚举* → **indirect**<sub>可选</sub> **enum** [*枚举名称*](#enum-name) [*泛型形参子句*](08_Generic_Parameters_and_Arguments.md#generic-parameter-clause)<sub>可选</sub> [类型继承子句](./03_Types.md#type-inheritance-clause)<sub>可选</sub> **{** [*多个联合风格枚举成员*](#union-style-enum-members)<sub>可选</sub> **}**
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>
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> union-style-enum-members {#union-style-enum-members}
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> ###### union-style-enum-members {#union-style-enum-members}
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>
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> *多个联合风格枚举成员* → [*联合风格枚举成员*](#union-style-enum-member) [*多个联合风格枚举成员*](#union-style-enum-members)<sub>可选</sub>
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>
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> union-style-enum-member {#union-style-enum-member}
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> ###### union-style-enum-member {#union-style-enum-member}
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>
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> *联合风格枚举成员* → [*声明*](#declaration) | [*联合风格枚举用例子句*](#union-style-enum-case-clause) | [*编译控制流语句*](05_Statements.md#compiler-control-statement)
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>
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> union-style-enum-case-clause {#union-style-enum-case-clause}
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> ###### union-style-enum-case-clause {#union-style-enum-case-clause}
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>
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> *联合风格枚举用例子句* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> **indirect**<sub>可选</sub> **case** [*联合风格枚举用例列表*](#union-style-enum-case-list)
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>
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> union-style-enum-case-list {#union-style-enum-case-list}
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> ###### union-style-enum-case-list {#union-style-enum-case-list}
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>
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> *联合风格枚举用例列表* → [*联合风格枚举用例*](#union-style-enum-case) | [*联合风格枚举用例*](#union-style-enum-case) **,** [*联合风格枚举用例列表*](#union-style-enum-case-list)
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>
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> union-style-enum-case {#union-style-enum-case}
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> ###### union-style-enum-case {#union-style-enum-case}
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>
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> *联合风格枚举用例* → [*枚举用例名称*](#enum-case-name) [*元组类型*](03_Types.md#tuple-type)<sub>可选</sub>
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>
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> enum-name {#enum-name}
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> ###### enum-name {#enum-name}
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>
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> *枚举名称* → [*标识符*](./02_Lexical_Structure.md#identifier)
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>
|
||||
> enum-case-name {#enum-case-name}
|
||||
> ###### enum-case-name {#enum-case-name}
|
||||
>
|
||||
> *枚举用例名称* → [*标识符*](./02_Lexical_Structure.md#identifier)
|
||||
>
|
||||
>
|
||||
> raw-value-style-enum {#raw-value-style-enum}
|
||||
> ###### raw-value-style-enum {#raw-value-style-enum}
|
||||
>
|
||||
>
|
||||
> *原始值风格枚举* → **enum** [*枚举名称*](#enum-name) [*泛型形参子句*](08_Generic_Parameters_and_Arguments.md#generic-parameter-clause)<sub>可选</sub> [*类型继承子句*](./03_Types.md#type-inheritance-clause) [*泛型 where 子句*](./09_Generic_Parameters_and_Arguments.md#generic-where-clause) **{** [*多个原始值风格枚举成员*](#raw-value-style-enum-members) **}**
|
||||
>
|
||||
> raw-value-style-enum-members {#raw-value-style-enum-members}
|
||||
> ###### raw-value-style-enum-members {#raw-value-style-enum-members}
|
||||
>
|
||||
> *多个原始值风格枚举成员* → [*原始值风格枚举成员*](#raw-value-style-enum-member) [*多个原始值风格枚举成员*](#raw-value-style-enum-members)<sub>可选</sub>
|
||||
>
|
||||
> raw-value-style-enum-member {#raw-value-style-enum-member}
|
||||
> ###### raw-value-style-enum-member {#raw-value-style-enum-member}
|
||||
>
|
||||
> *原始值风格枚举成员* → [*声明*](#declaration) | [*原始值风格枚举用例子句*](#raw-value-style-enum-case-clause) | [*编译控制流语句*](05_Statements.md#compiler-control-statement)
|
||||
>
|
||||
> raw-value-style-enum-case-clause {#raw-value-style-enum-case-clause}
|
||||
> ###### raw-value-style-enum-case-clause {#raw-value-style-enum-case-clause}
|
||||
>
|
||||
> *原始值风格枚举用例子句* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> **case** [*原始值风格枚举用例列表*](#raw-value-style-enum-case-list)
|
||||
>
|
||||
> raw-value-style-enum-case-list {#raw-value-style-enum-case-list}
|
||||
> ###### raw-value-style-enum-case-list {#raw-value-style-enum-case-list}
|
||||
>
|
||||
> *原始值风格枚举用例列表* → [*原始值风格枚举用例*](#raw-value-style-enum-case) | [*原始值风格枚举用例*](#raw-value-style-enum-case) **,** [*原始值风格枚举用例列表*](#raw-value-style-enum-case-list)
|
||||
>
|
||||
> raw-value-style-enum-case {#raw-value-style-enum-case}
|
||||
> ###### raw-value-style-enum-case {#raw-value-style-enum-case}
|
||||
>
|
||||
> *原始值风格枚举用例* → [*枚举用例名称*](#enum-case-name) [*原始值赋值*](#raw-value-assignment)<sub>可选</sub>
|
||||
>
|
||||
> raw-value-assignment {#raw-value-assignment}
|
||||
> ###### raw-value-assignment {#raw-value-assignment}
|
||||
>
|
||||
> *原始值赋值* → **=** [*原始值字面量*](#raw-value-literal)
|
||||
>
|
||||
> raw-value-literal {#raw-value-literal}
|
||||
> ###### raw-value-literal {#raw-value-literal}
|
||||
>
|
||||
> *原始值字面量* → [数字型字面量](./02_Lexical_Structure.md#numeric-literal) | [字符串型字面量](./02_Lexical_Structure.md#static-string-literal) | [布尔型字面量](./02_Lexical_Structure.md#boolean-literal)
|
||||
>
|
||||
@ -837,28 +837,28 @@ struct 结构体名称: 采纳的协议 {
|
||||
|
||||
可以使用扩展声明来扩展结构体类型的行为，请参阅 [扩展声明](#extension_declaration)。
|
||||
|
||||
grammer_of_a_structure_declaration {#grammer_of_a_structure_declaration}
|
||||
###### {#grammer_of_a_structure_declaration}
|
||||
> 结构体声明语法
|
||||
>
|
||||
>
|
||||
> struct-declaration {#struct-declaration}
|
||||
> ###### struct-declaration {#struct-declaration}
|
||||
>
|
||||
> *结构体声明* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [*访问级别修饰符*](#access-level-modifier) <sub>可选</sub> **struct** [*结构体名称*](#struct-name) [*泛型形参子句*](08_Generic_Parameters_and_Arguments.md#generic-parameter-clause)<sub>可选</sub> [*类型继承子句*](./03_Types.md#type-inheritance-clause)<sub>可选</sub> [*泛型 where 子句*](./09_Generic_Parameters_and_Arguments.md#generic-where-clause)<sub>可选</sub> [*结构体主体*](#struct-body)
|
||||
>
|
||||
> struct-name {#struct-name}
|
||||
> ###### struct-name {#struct-name}
|
||||
>
|
||||
> *结构体名称* → [*标识符*](./02_Lexical_Structure.md#identifier)
|
||||
>
|
||||
> struct-body {#struct-body}
|
||||
> ###### struct-body {#struct-body}
|
||||
>
|
||||
> *结构体主体* → **{** [*多条声明*](#declarations)<sub>可选</sub> **}**
|
||||
>
|
||||
> struct-name {#struct-name}
|
||||
> ###### struct-name {#struct-name}
|
||||
>
|
||||
>
|
||||
> *结构体多个成员* → [*结构体成员*](#struct-member) [*结构体多个成员*](#struct-members)<sub>可选</sub>
|
||||
>
|
||||
> struct-member {#struct-member}
|
||||
> ###### struct-member {#struct-member}
|
||||
>
|
||||
> *结构体成员* → [*声明*](#declaration) | [*编译控制流语句*](05_Statements.md#compiler-control-statement)
|
||||
>
|
||||
@ -896,28 +896,28 @@ class 类名: 超类, 采纳的协议 {
|
||||
|
||||
可以使用扩展声明来扩展类的行为，请参阅 [扩展声明](#extension_declaration)。
|
||||
|
||||
grammer_of_a_class_declaration {#grammer_of_a_class_declaration}
|
||||
###### {#grammer_of_a_class_declaration}
|
||||
> 类声明语法
|
||||
>
|
||||
>
|
||||
> class-declaration {#class-declaration}
|
||||
> ###### class-declaration {#class-declaration}
|
||||
>
|
||||
> *类声明* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [访问级别修饰符](#access-level-modifier)<sub>可选</sub> **final**<sub>可选</sub> **class** [*类名*](#class-name) [*泛型形参子句*](08_Generic_Parameters_and_Arguments.md#generic-parameter-clause)<sub>可选</sub> [*类型继承子句*](./03_Types.md#type-inheritance-clause)<sub>可选</sub> [*泛型 where 子句*](./09_Generic_Parameters_and_Arguments.md#generic-where-clause)<sub>可选</sub> [*类主体*](#class-body)
|
||||
>
|
||||
> *类声明* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> **final** [访问级别修饰符](#access-level-modifier)<sub>可选</sub> **class** [*类名*](#class-name) [*泛型形参子句*](08_Generic_Parameters_and_Arguments.md#generic-parameter-clause)<sub>可选</sub> [*类型继承子句*](./03_Types.md#type-inheritance-clause)<sub>可选</sub> [*泛型 where 子句*](./09_Generic_Parameters_and_Arguments.md#generic-where-clause)<sub>可选</sub> [*类主体*](#class-body)
|
||||
>
|
||||
> class-name {#class-name}
|
||||
> ###### class-name {#class-name}
|
||||
>
|
||||
> *类名* → [*标识符*](./02_Lexical_Structure.md#identifier)
|
||||
>
|
||||
> class-body {#class-body}
|
||||
> ###### class-body {#class-body}
|
||||
>
|
||||
> *类主体* → **{** [*多条声明*](#declarations)<sub>可选</sub> **}**
|
||||
>
|
||||
>
|
||||
> *类多个成员* → [*类成员*](#class-member) [*类多个成员*](#class-members)<sub>可选</sub>
|
||||
>
|
||||
> class-member {#class-member}
|
||||
> ###### class-member {#class-member}
|
||||
>
|
||||
> *类成员* → [*声明*](#declaration) | [*编译控制流语句*](05_Statements.md#compiler-control-statement)
|
||||
>
|
||||
@ -963,31 +963,31 @@ protocol SomeProtocol: AnyObject {
|
||||
|
||||
可以使用协议来声明作为代理的类或者结构体应该实现的方法，正如 [委托（代理）模式](../chapter2/21_Protocols.md#delegation) 中所述。
|
||||
|
||||
grammer_of_a_protocol_declaration {#grammer_of_a_protocol_declaration}
|
||||
###### {#grammer_of_a_protocol_declaration}
|
||||
> 协议声明语法
|
||||
>
|
||||
>
|
||||
> protocol-declaration {#protocol-declaration}
|
||||
> ###### protocol-declaration {#protocol-declaration}
|
||||
>
|
||||
> *协议声明* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [*访问级别修饰符*](#access-level-modifier)<sub>可选</sub> **protocol** [*协议名称*](#protocol-name) [*类型继承子句*](03_Types.md#type-inheritance-clause)<sub>可选</sub> [*泛型 where 子句*](./09_Generic_Parameters_and_Arguments.md#generic-where-clause)<sub>可选</sub> [*协议主体*](#protocol-body)
|
||||
>
|
||||
> protocol-name {#protocol-name}
|
||||
> ###### protocol-name {#protocol-name}
|
||||
>
|
||||
> *协议名称* → [*标识符*](./02_Lexical_Structure.md#identifier)
|
||||
>
|
||||
> protocol-body {#protocol-body}
|
||||
> ###### protocol-body {#protocol-body}
|
||||
>
|
||||
> *协议主体* → **{** [*协议成员声明列表*](#protocol-member-declarations)<sub>可选</sub> **}**
|
||||
>
|
||||
>
|
||||
> *协议多个成员* → [*协议成员*](#protocol-member) [*协议多个成员*](#protocol-members)<sub>可选</sub>
|
||||
>
|
||||
> protocol-member {#protocol-member}
|
||||
> ###### protocol-member {#protocol-member}
|
||||
>
|
||||
> *协议成员* → [*协议成员声明*](#protocol-member-declaration) | [*编译控制流语句*](05_Statements.md#compiler-control-statement)
|
||||
>
|
||||
>
|
||||
> protocol-member-declaration {#protocol-member-declaration}
|
||||
> ###### protocol-member-declaration {#protocol-member-declaration}
|
||||
>
|
||||
> *协议成员声明* → [*协议属性声明*](#protocol-property-declaration)
|
||||
>
|
||||
@ -999,7 +999,7 @@ grammer_of_a_protocol_declaration {#grammer_of_a_protocol_declaration}
|
||||
>
|
||||
> *协议成员声明* → [*协议关联类型声明*](#protocol-associated-type-declaration)
|
||||
>
|
||||
> protocol-member-declarations {#protocol-member-declarations}
|
||||
> ###### protocol-member-declarations {#protocol-member-declarations}
|
||||
>
|
||||
> *协议成员声明列表* → [*协议成员声明*](#protocol-member-declaration) [*协议成员声明列表*](#protocol-member-declarations)<sub>可选</sub>
|
||||
>
|
||||
@ -1017,10 +1017,10 @@ var 属性名: 类型 { get set }
|
||||
|
||||
另请参阅 [变量声明](#variable_declaration)。
|
||||
|
||||
grammer_of_an_import_declaration {#grammer_of_an_import_declaration}
|
||||
###### {#grammer_of_an_import_declaration}
|
||||
> 协议属性声明语法
|
||||
>
|
||||
> protocol-property-declaration {#protocol-property-declaration}
|
||||
> ###### protocol-property-declaration {#protocol-property-declaration}
|
||||
>
|
||||
> *协议属性声明* → [*变量声明头*](#variable-declaration-head) [*变量名称*](#variable-name) [*类型标注*](03_Types.md#type-annotation) [*getter-setter 关键字代码块*](#getter-setter-keyword-block)
|
||||
>
|
||||
@ -1032,10 +1032,10 @@ grammer_of_an_import_declaration {#grammer_of_an_import_declaration}
|
||||
|
||||
另请参阅 [函数声明](#function_declaration)。
|
||||
|
||||
grammer_of_a_protocol_declaration {#grammer_of_a_protocol_declaration}
|
||||
###### {#grammer_of_a_protocol_declaration}
|
||||
> 协议方法声明语法
|
||||
>
|
||||
> protocol-method-declaration {#protocol-method-declaration}
|
||||
> ###### protocol-method-declaration {#protocol-method-declaration}
|
||||
>
|
||||
> *协议方法声明* → [*函数头*](#function-head) [*函数名*](#function-name) [*泛型形参子句*](08_Generic_Parameters_and_Arguments.md#generic-parameter-clause)<sub>可选</sub> [*函数签名*](#function-signature) [*泛型 where 子句*](08_Generic_Parameters_and_Arguments.md#generic-where-clause)<sub>可选</sub>
|
||||
>
|
||||
@ -1050,10 +1050,10 @@ grammer_of_a_protocol_declaration {#grammer_of_a_protocol_declaration}
|
||||
|
||||
另请参阅 [构造器声明](#initializer_declaration)。
|
||||
|
||||
grammer_of_a_protocol_initializer_declaration {#grammer_of_a_protocol_initializer_declaration}
|
||||
###### {#grammer_of_a_protocol_initializer_declaration}
|
||||
> 协议构造器声明语法
|
||||
>
|
||||
> protocol-initializer-declaration {#protocol-initializer-declaration}
|
||||
> ###### protocol-initializer-declaration {#protocol-initializer-declaration}
|
||||
>
|
||||
> *协议构造器声明* → [*构造器头*](#initializer-head) [*泛型形参子句*](08_Generic_Parameters_and_Arguments.md#generic-parameter-clause)<sub>可选</sub> [*参数子句*](#parameter-clause) **throws**<sub>可选</sub> [*泛型 where 子句*](08_Generic_Parameters_and_Arguments.md#generic-where-clause)<sub>可选</sub>
|
||||
>
|
||||
@ -1072,10 +1072,10 @@ subscript (参数列表) -> 返回类型 { get set }
|
||||
|
||||
另请参阅 [下标声明](#subscript_declaration)。
|
||||
|
||||
grammer_of_a_protocol_subscript_declaration {#grammer_of_a_protocol_subscript_declaration}
|
||||
###### {#grammer_of_a_protocol_subscript_declaration}
|
||||
> 协议下标声明语法
|
||||
>
|
||||
> protocol-subscript-declaration {#protocol-subscript-declaration}
|
||||
> ###### protocol-subscript-declaration {#protocol-subscript-declaration}
|
||||
>
|
||||
> *协议下标声明* → [*下标头*](#subscript-head) [*下标结果*](#subscript-result) [*泛型 where 子句*](08_Generic_Parameters_and_Arguments.md#generic-where-clause)<sub>可选</sub> [*getter-setter 关键字代码块*](#getter-setter-keyword-block)
|
||||
>
|
||||
@ -1103,10 +1103,10 @@ protocol SubProtocolB: SomeProtocol where SomeType: Equatable { }
|
||||
|
||||
另请参阅 [类型别名声明](#type_alias_declaration)。
|
||||
|
||||
grammer_of_a_protocol_associated_type_declaration {#grammer_of_a_protocol_associated_type_declaration}
|
||||
###### {#grammer_of_a_protocol_associated_type_declaration}
|
||||
> 协议关联类型声明语法
|
||||
>
|
||||
> protocol-associated-type-declaration {#protocol-associated-type-declaration}
|
||||
> ###### protocol-associated-type-declaration {#protocol-associated-type-declaration}
|
||||
>
|
||||
> *协议关联类型声明* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [*访问级别修饰符*](#access-level-modifier)<sub>可选</sub> **associatedtype** [*类型别名头*](#typealias-head) [*类型继承子句*](03_Types.md#type-inheritance-clause)<sub>可选</sub> [*类型别名赋值*](#typealias-assignment)<sub>可选</sub> [*泛型 where 子句*](08_Generic_Parameters_and_Arguments.md#generic-where-clause)<sub>可选</sub>
|
||||
>
|
||||
@ -1194,16 +1194,16 @@ if let actualInstance = SomeStruct(input: "Hello") {
|
||||
|
||||
更多关于可失败构造器的信息和例子，请参阅 [可失败构造器](../chapter2/14_Initialization.md#failable_initializers)。
|
||||
|
||||
grammer_of_an_initializer_declaration {#grammer_of_an_initializer_declaration}
|
||||
###### {#grammer_of_an_initializer_declaration}
|
||||
> 构造器声明语法
|
||||
>
|
||||
> initializer-declaration {#initializer-declaration}
|
||||
> ###### initializer-declaration {#initializer-declaration}
|
||||
>
|
||||
> *构造器声明* → [*构造器头*](#initializer-head) [*泛型形参子句*](08_Generic_Parameters_and_Arguments.md#generic-parameter-clause)<sub>可选</sub> [*参数子句*](#parameter-clause) **throws**<sub>可选</sub> [*泛型 where 子句*](08_Generic_Parameters_and_Arguments.md#generic-where-clause)<sub>可选</sub> [*构造器主体*](#initializer-body)
|
||||
>
|
||||
> *构造器声明* → [*构造器头*](#initializer-head) [*泛型形参子句*](08_Generic_Parameters_and_Arguments.md#generic-parameter-clause)<sub>可选</sub> [*参数子句*](#parameter-clause) **rethrows**<sub>可选</sub> [*泛型 where 子句*](08_Generic_Parameters_and_Arguments.md#generic-where-clause)<sub>可选</sub> [*构造器主体*](#initializer-body)
|
||||
>
|
||||
> initializer-head {#initializer-head}
|
||||
> ###### initializer-head {#initializer-head}
|
||||
>
|
||||
> *构造器头* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [*声明修饰符列表*](#declaration-modifiers)<sub>可选</sub> **init**
|
||||
>
|
||||
@ -1211,7 +1211,7 @@ grammer_of_an_initializer_declaration {#grammer_of_an_initializer_declaration}
|
||||
>
|
||||
> *构造器头* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [*声明修饰符列表*](#declaration-modifiers)<sub>可选</sub> **init** **!**
|
||||
>
|
||||
> initializer-body {#initializer-body}
|
||||
> ###### initializer-body {#initializer-body}
|
||||
>
|
||||
> *构造器主体* → [*代码块*](#code-block)
|
||||
>
|
||||
@ -1233,10 +1233,10 @@ deinit {
|
||||
|
||||
关于如何在类声明中使用析构器的例子，请参阅 [析构过程](../chapter2/15_Deinitialization.md)。
|
||||
|
||||
grammer_of_a_deinitializer_declaration {#grammer_of_a_deinitializer_declaration}
|
||||
###### {#grammer_of_a_deinitializer_declaration}
|
||||
> 析构器声明语法
|
||||
>
|
||||
> deinitializer-declaration {#deinitializer-declaration}
|
||||
> ###### deinitializer-declaration {#deinitializer-declaration}
|
||||
>
|
||||
> *析构器声明* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> **deinit** [*代码块*](#code-block)
|
||||
>
|
||||
@ -1416,15 +1416,15 @@ extension Array: Loggable where Element: MarkedLoggable { }
|
||||
// 报错: redundant conformance of 'Array<Element>' to protocol 'Loggable'
|
||||
```
|
||||
|
||||
grammer_of_an_extension_declaration {#grammer_of_an_extension_declaration}
|
||||
###### {#grammer_of_an_extension_declaration}
|
||||
> 扩展声明语法
|
||||
>
|
||||
>
|
||||
> extension-declaration {#extension-declaration}
|
||||
> ###### extension-declaration {#extension-declaration}
|
||||
>
|
||||
> *扩展声明* → [特性](./07_Attributes.md#type_attributes)<sub>可选</sub> [访问级别修饰符](#access-level-modifier)<sub>可选</sub> **extension** [*类型标识符*](03_Types.md#type-identifier) [*类型-继承-子句*](./03_Types.md#type-inheritance-clause)<sub>可选</sub> [*泛型 where 子句*](./09_Generic_Parameters_and_Arguments.md#generic-where-clause)<sub>可选</sub> [*扩展主体*](#extension-body)
|
||||
>
|
||||
> extension-body {#extension-body}
|
||||
> ###### extension-body {#extension-body}
|
||||
>
|
||||
> *扩展主体* → **{** [*多条声明*](#declarations)<sub>可选</sub> **}**
|
||||
>
|
||||
@ -1464,11 +1464,11 @@ subscript (参数列表) -> 返回类型 {
|
||||
|
||||
更多关于下标的信息和例子，请参阅 [下标](../chapter2/12_Subscripts.md)。
|
||||
|
||||
grammer_of_a_subscript_declaration {#grammer_of_a_subscript_declaration}
|
||||
###### {#grammer_of_a_subscript_declaration}
|
||||
> 下标声明语法
|
||||
>
|
||||
>
|
||||
> subscript-declaration {#subscript-declaration}
|
||||
> ###### subscript-declaration {#subscript-declaration}
|
||||
>
|
||||
> *下标声明* → [*下标头*](#subscript-head) [*下标结果*](#subscript-result) [*泛型 where 子句*](08_Generic_Parameters_and_Arguments.md#generic-where-clause)<sub>可选</sub> [*代码块*](#code-block)
|
||||
>
|
||||
@ -1476,11 +1476,11 @@ grammer_of_a_subscript_declaration {#grammer_of_a_subscript_declaration}
|
||||
>
|
||||
> *下标声明* → [*下标头*](#subscript-head) [*下标结果*](#subscript-result) [*泛型 where 子句*](08_Generic_Parameters_and_Arguments.md#generic-where-clause)<sub>可选</sub> [*getter-setter 关键字代码块*](#getter-setter-keyword-block)
|
||||
>
|
||||
> subscript-head {#subscript-head}
|
||||
> ###### subscript-head {#subscript-head}
|
||||
>
|
||||
> *下标头* → [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [*声明修饰符列表*](#declaration-modifiers)<sub>可选</sub> **subscript** [*泛型参数子句*](08_Generic_Parameters_and_Arguments.md#generic-parameter-clause)<sub>可选</sub> [*参数子句*](#parameter-clause)
|
||||
>
|
||||
> subscript-result {#subscript-result}
|
||||
> ###### subscript-result {#subscript-result}
|
||||
>
|
||||
> *下标结果* → **->** [*特性列表*](./07_Attributes.md#attributes)<sub>可选</sub> [*类型*](./03_Types.md#type)
|
||||
>
|
||||
@ -1524,24 +1524,24 @@ postfix operator 运算符名称 {}
|
||||
|
||||
声明了一个新的运算符以后，需要实现一个跟这个运算符同名的函数来实现这个运算符。如果是实现一个前缀或者后缀运算符，也必须使用相符的 `prefix` 或者 `postfix` 声明修饰符标记函数声明。如果是实现中缀运算符，则不需要使用 `infix` 声明修饰符标记函数声明。关于如何实现一个新的运算符的例子，请参阅 [自定义运算符](../chapter2/26_Advanced_Operators.md#custom_operators)。
|
||||
|
||||
grammer_of_an_operator_declaration {#grammer_of_an_operator_declaration}
|
||||
###### {#grammer_of_an_operator_declaration}
|
||||
> 运算符声明语法
|
||||
>
|
||||
operator-declaration {#operator-declaration}
|
||||
###### {#operator-declaration}
|
||||
> *运算符声明* → [*前缀运算符声明*](#prefix-operator-declaration) | [*后缀运算符声明*](#postfix-operator-declaration) | [*中缀运算符声明*](#infix-operator-declaration)
|
||||
>
|
||||
prefix-operator-declaration {#prefix-operator-declaration}
|
||||
###### {#prefix-operator-declaration}
|
||||
> *前缀运算符声明* → **prefix** **运算符** [*运算符*](./02_Lexical_Structure.md#operator) **{** **}**
|
||||
>
|
||||
> postfix-operator-declaration {#postfix-operator-declaration}
|
||||
> ###### postfix-operator-declaration {#postfix-operator-declaration}
|
||||
>
|
||||
> *后缀运算符声明* → **postfix** **运算符** [*运算符*](./02_Lexical_Structure.html#operator) **{** **}**
|
||||
>
|
||||
> infix-operator-declaration {#infix-operator-declaration}
|
||||
> ###### infix-operator-declaration {#infix-operator-declaration}
|
||||
>
|
||||
> *中缀运算符声明* → **infix** **运算符** [*运算符*](./02_Lexical_Structure.md#operator) **{** [*中缀运算符属性*](#infix-operator-attributes)<sub>可选</sub> **}**
|
||||
>
|
||||
infix-operator-group {#infix-operator-group}
|
||||
###### {#infix-operator-group}
|
||||
> *中缀运算符组* → [*优先级组名称*](#precedence-group-name)
|
||||
>
|
||||
|
||||
@ -1571,43 +1571,43 @@ Swift 定义了大量的优先级组来与标准库的运算符配合使用，
|
||||
|
||||
优先级组的赋值性表示在包含可选链操作时的运算符优先级。当设为 true 时，与优先级组对应的运算符在可选链操作中使用和标准库中赋值运算符同样的分组规则，当设为 false 或者不设置，该优先级组的运算符与不赋值的运算符遵循同样的可选链规则。
|
||||
|
||||
grammer_of_a_precedence_group_declaration {#grammer_of_a_precedence_group_declaration}
|
||||
###### {#grammer_of_a_precedence_group_declaration}
|
||||
> 优先级组声明语法
|
||||
>
|
||||
precedence-group-declaration {#precedence-group-declaration}
|
||||
###### {#precedence-group-declaration}
|
||||
> *优先级组声明* → **precedence**[*优先级组名称*](#precedence-group-name){[*多优先级组属性*](#precedence-group-attributes)<sub>可选</sub> }
|
||||
>
|
||||
precedence-group-attributes {#precedence-group-attributes}
|
||||
###### {#precedence-group-attributes}
|
||||
> *优先级组属性* → [*优先级组属性*](#precedence-group-attribute)[*多优先级组属性*](#precedence-group-attributes)<sub>可选</sub> **{** **}**
|
||||
>
|
||||
precedence-group-attribute {#precedence-group-attribute}
|
||||
###### {#precedence-group-attribute}
|
||||
> *优先级组属性* → [*优先级组关系*](#precedence-group-relation)
|
||||
>
|
||||
> *优先级组属性* → [*优先级组赋值性*](#precedence-group-assignment)
|
||||
>
|
||||
> *优先级组属性* → [*优先级组相关性*](#precedence-group-associativity)
|
||||
>
|
||||
> precedence-group-relation {#precedence-group-relation}
|
||||
> ###### precedence-group-relation {#precedence-group-relation}
|
||||
>
|
||||
> *优先级组关系* → **higherThan:**[*多优先级组名称*](#precedence-group-names)
|
||||
>
|
||||
> *优先级组关系* → **lowerThan:**[*多优先级组名称*](#precedence-group-names)
|
||||
>
|
||||
> precedence-group-assignment {#precedence-group-assignment}
|
||||
> ###### precedence-group-assignment {#precedence-group-assignment}
|
||||
>
|
||||
> *优先级组赋值* → **assignment:**[*布尔字面值*](./02_Lexical_Structure.md#boolean-literal)
|
||||
>
|
||||
precedence-group-associativity {#precedence-group-associativity}
|
||||
###### {#precedence-group-associativity}
|
||||
> *优先级组结合性* → **associativity:left**
|
||||
>
|
||||
> *优先级组结合性* → **associativity:right**
|
||||
>
|
||||
> *优先级组结合性* → **associativity:none**
|
||||
>
|
||||
precedence-group-names {#precedence-group-names}
|
||||
###### {#precedence-group-names}
|
||||
> *多优先级组名称* → [*优先级组名称*](#precedence-group-name) | [*优先级组名称*](#precedence-group-name) | [*优先级组名称*](#precedence-group-name)
|
||||
>
|
||||
precedence-group-name {#precedence-group-name}
|
||||
###### {#precedence-group-name}
|
||||
> *优先级组名称* →[*标识符*](./02_Lexical_Structure.md#identifier)
|
||||
>
|
||||
|
||||
@ -1671,19 +1671,19 @@ Swift 提供了三个级别的访问控制：`public`、`internal` 和 `private`
|
||||
|
||||
以上访问级别修饰符都可以选择带上一个参数，该参数由一对圆括号和其中的 `set` 关键字组成（例如，`private(set)`）。使用这种形式的访问级别修饰符来限制某个属性或下标的 setter 的访问级别低于其本身的访问级别，正如 [Getter 和 Setter](../chapter2/25_Access_Control.md#getters_and_setters) 中所讨论的。
|
||||
|
||||
grammer_of_a_declaration_modifier {#grammer_of_a_declaration_modifier}
|
||||
###### {#grammer_of_a_declaration_modifier}
|
||||
> 声明修饰符的语法
|
||||
>
|
||||
declaration-modifier {#declaration-modifier}
|
||||
###### {#declaration-modifier}
|
||||
> *声明修饰符* → **class** | **convenience**| **dynamic** | **final** | **infix** | **lazy** | **mutating** | **nonmutating** | **optional** | **override** | **postfix** | **prefix** | **required** | **static** | **unowned** | **unowned ( safe )** | **unowned ( unsafe )** | **weak**
|
||||
>
|
||||
> 声明修饰符 → [*访问级别修饰符*](#access-level-modifier)
|
||||
>
|
||||
> declaration-modifiers {#declaration-modifiers}
|
||||
> ###### declaration-modifiers {#declaration-modifiers}
|
||||
>
|
||||
> *声明修饰符列表* → [*声明修饰符*](#declaration-modifier) [*声明修饰符列表*](#declaration-modifiers)<sub>可选</sub>
|
||||
>
|
||||
access-level-modifier {#access-level-modifier}
|
||||
###### {#access-level-modifier}
|
||||
> 访问级别修饰符 → **internal** | **internal ( set )**
|
||||
>
|
||||
> 访问级别修饰符 → **private** | **private ( set )**
|
||||
|
||||
Reference in New Issue
Block a user