andre/the-swift-programming-language-in-chinese
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

更新10_Summary_of_the_Grammar(from Lexical Structure -> Types).md (#913)

Browse Source 
* 第三章 10_Summary_of_the_Grammar（从 Declarations 到 Generic Parameters and Arguments）

* 10_Summary_of_the_Grammar(from Declarations -> Generic Parameters and Arguments)的翻译 (#911)

* Update 10_Summary_of_the_Grammar(from Lexical Structure -> Types).md.

去掉"可选"前的空格
This commit is contained in:
Chen Jia
2019-03-31 10:57:16 +08:00
committed by Jie Liang
parent 4d6ef27d54
commit 307ddedd43
1 changed files with 84 additions and 84 deletions
Download Patch File Download Diff File Expand all files Collapse all files

168
source/chapter3/10_Summary_of_the_Grammar(from Declarations -> Generic Parameters and Arguments).md
View File

@ -32,7 +32,7 @@
>
> *声明* → [优先级组声明](./06_Declarations.md#precedence_group_declaration)
>
> *声明集* → [声明](./06_Declarations.md#declaration) [声明集](./06_Declarations.md#declarations) <sub>可选</sub>
> *声明集* → [声明](./06_Declarations.md#declaration) [声明集](./06_Declarations.md#declarations)<sub>可选</sub>
>
@ -40,21 +40,21 @@
> 顶级声明语法
>
> *顶级声明* → [多条语句](./05_Statements.md#statements) <sub>可选</sub>
> *顶级声明* → [多条语句](./05_Statements.md#statements)<sub>可选</sub>
>
<!-- -->
> 代码块语法
>
> *代码块* → **{** [多条语句](./05_Statements.md#statements) <sub>可选</sub> **}**
> *代码块* → **{** [多条语句](./05_Statements.md#statements)<sub>可选</sub> **}**
>
<!-- -->
> 导入声明语法
>
> *导入声明* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> **import** [导入类型](./06_Declarations.md#import_kind) <sub>可选</sub> [导入路径](./06_Declarations.md#import_path)
> *导入声明* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> **import** [导入类型](./06_Declarations.md#import_kind)<sub>可选</sub> [导入路径](./06_Declarations.md#import_path)
>
> *导入类型* → **typealias** | **struct** | **class** | **enum** | **protocol** | **let** | **var** | **func**
>
@ -67,11 +67,11 @@
> 常数声明语法
>
> *常量声明* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [声明修饰符集](./06_Declarations.md#declaration_specifiers) <sub>可选</sub> **let** [模式构造器集](./06_Declarations.md#pattern_initializer_list)
> *常量声明* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [声明修饰符集](./06_Declarations.md#declaration_specifiers)<sub>可选</sub> **let** [模式构造器集](./06_Declarations.md#pattern_initializer_list)
>
> *模式构造器集* → [模式构造器](./06_Declarations.md#pattern_initializer) | [模式构造器](./06_Declarations.md#pattern_initializer) **,** [模式构造器集](./06_Declarations.md#pattern_initializer_list)
>
> *模式构造器* → [模式](./08_Patterns.md#pattern) [构造器](./06_Declarations.md#initializer) <sub>可选</sub>
> *模式构造器* → [模式](./08_Patterns.md#pattern) [构造器](./06_Declarations.md#initializer)<sub>可选</sub>
>
> *构造器* → **=** [表达式](./04_Expressions.md#expression)
>
@ -88,49 +88,49 @@
>
> *变量声明* → [变量声明头](./06_Declarations.md#variable_declaration_head) [变量名](./06_Declarations.md#variable_name) [类型注解](./03_Types.md#type_annotation) [getter-setter 关键字块](./06_Declarations.md#getter_setter_keyword_block)
>
> *变量声明* → [变量声明头](./06_Declarations.md#variable_declaration_head) [变量名](./06_Declarations.md#variable_name) [构造器](./06_Declarations.md#initializer) <sub>可选</sub> [willSet-didSet 代码块](./06_Declarations.md#willSet_didSet_block)
> *变量声明* → [变量声明头](./06_Declarations.md#variable_declaration_head) [变量名](./06_Declarations.md#variable_name) [构造器](./06_Declarations.md#initializer)<sub>可选</sub> [willSet-didSet 代码块](./06_Declarations.md#willSet_didSet_block)
>
> *变量声明* → [变量声明头](./06_Declarations.md#variable_declaration_head) [变量名](./06_Declarations.md#variable_name) [类型注解](./03_Types.md#type_annotation) [构造器](./06_Declarations.md#initializer) <sub>可选</sub> [willSet-didSet 代码块](./06_Declarations.md#willSet_didSet_block)
> *变量声明* → [变量声明头](./06_Declarations.md#variable_declaration_head) [变量名](./06_Declarations.md#variable_name) [类型注解](./03_Types.md#type_annotation) [构造器](./06_Declarations.md#initializer)<sub>可选</sub> [willSet-didSet 代码块](./06_Declarations.md#willSet_didSet_block)
>
> *变量声明头* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [声明修饰符集](./06_Declarations.md#declaration_specifiers) <sub>可选</sub> **var**
> *变量声明头* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [声明修饰符集](./06_Declarations.md#declaration_specifiers)<sub>可选</sub> **var**
>
> *变量名称* → [标识符](./02_Lexical_Structure.md#identifier)
>
> *getter-setter 块* → [代码块](./06_Declarations.md#code_block)
>
> *getter-setter 块* → **{** [getter 子句](./06_Declarations.md#getter_clause) [setter 子句](./06_Declarations.md#setter_clause) <sub>可选</sub> **}**
> *getter-setter 块* → **{** [getter 子句](./06_Declarations.md#getter_clause) [setter 子句](./06_Declarations.md#setter_clause)<sub>可选</sub> **}**
>
> *getter-setter 块* → **{** [setter 子句](./06_Declarations.md#setter_clause) [getter 子句](./06_Declarations.md#getter_clause) **}**
>
> *getter 子句* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [可变性修饰符](./06_Declarations.md#mutation-modifier) <sub>可选</sub> **get** [代码块](./06_Declarations.md#code_block)
> *getter 子句* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [可变性修饰符](./06_Declarations.md#mutation-modifier)<sub>可选</sub> **get** [代码块](./06_Declarations.md#code_block)
>
> *setter 子句* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [可变性修饰符](./06_Declarations.md#mutation-modifier) <sub>可选</sub> **set** [setter 名称](./06_Declarations.md#setter_name) <sub>可选</sub> [代码块](./06_Declarations.md#code_block)
> *setter 子句* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [可变性修饰符](./06_Declarations.md#mutation-modifier)<sub>可选</sub> **set** [setter 名称](./06_Declarations.md#setter_name)<sub>可选</sub> [代码块](./06_Declarations.md#code_block)
>
> *setter 名称* → **(** [标识符](./02_Lexical_Structure.md#identifier) **)**
>
> *getter-setter 关键字（Keyword）块* → **{** [getter 关键字子句](./06_Declarations.md#getter_keyword_clause) [setter 关键字子句](./06_Declarations.md#setter_keyword_clause) <sub>可选</sub> **}**
> *getter-setter 关键字（Keyword）块* → **{** [getter 关键字子句](./06_Declarations.md#getter_keyword_clause) [setter 关键字子句](./06_Declarations.md#setter_keyword_clause)<sub>可选</sub> **}**
>
> *getter-setter 关键字（Keyword）块* → **{** [setter 关键字子句](./06_Declarations.md#setter_keyword_clause) [getter 关键字子句](./06_Declarations.md#getter_keyword_clause) **}**
>
> *getter 关键字（Keyword）子句* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [可变性修饰符](./06_Declarations.md#mutation-modifier) <sub>可选</sub> **get**
> *getter 关键字（Keyword）子句* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [可变性修饰符](./06_Declarations.md#mutation-modifier)<sub>可选</sub> **get**
>
> *setter 关键字（Keyword）子句* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [可变性修饰符](./06_Declarations.md#mutation-modifier) <sub>可选</sub> **set**
> *setter 关键字（Keyword）子句* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [可变性修饰符](./06_Declarations.md#mutation-modifier)<sub>可选</sub> **set**
>
> *willSet-didSet 代码块* → **{** [willSet 子句](./06_Declarations.md#willSet_clause) [didSet 子句](./06_Declarations.md#didSet_clause) <sub>可选</sub> **}**
> *willSet-didSet 代码块* → **{** [willSet 子句](./06_Declarations.md#willSet_clause) [didSet 子句](./06_Declarations.md#didSet_clause)<sub>可选</sub> **}**
>
> *willSet-didSet 代码块* → **{** [didSet 子句](./06_Declarations.md#didSet_clause) [willSet 子句](./06_Declarations.md#willSet_clause) <sub>可选</sub> **}**
> *willSet-didSet 代码块* → **{** [didSet 子句](./06_Declarations.md#didSet_clause) [willSet 子句](./06_Declarations.md#willSet_clause)<sub>可选</sub> **}**
>
> *willSet 子句* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> **willSet** [setter 名称](./06_Declarations.md#setter_name) <sub>可选</sub> [代码块](./06_Declarations.md#code_block)
> *willSet 子句* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> **willSet** [setter 名称](./06_Declarations.md#setter_name)<sub>可选</sub> [代码块](./06_Declarations.md#code_block)
>
> *didSet 子句* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub>
> *didSet 子句* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub>
>
**didSet** [setter 名称](./06_Declarations.md#setter_name) <sub>可选</sub> [代码块](./06_Declarations.md#code_block)
**didSet** [setter 名称](./06_Declarations.md#setter_name)<sub>可选</sub> [代码块](./06_Declarations.md#code_block)
<!-- -->
> 类型别名声明语法
>
> *类型别名声明* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier) **typealias** [类型别名名称](./06_Declarations.md#typealias_name) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause) <sub>可选</sub> [类型别名赋值](./06_Declarations.md#typealias_assignment)
> *类型别名声明* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier) **typealias** [类型别名名称](./06_Declarations.md#typealias_name) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause)<sub>可选</sub> [类型别名赋值](./06_Declarations.md#typealias_assignment)
>
> *类型别名名称* → [标识符](./02_Lexical_Structure.md#identifier)
>
@ -141,18 +141,18 @@
> 函数声明语法
>
> *函数声明* → [函数头](./06_Declarations.md#function_head) [函数名](./06_Declarations.md#function_name) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause) <sub>可选</sub> [函数签名](./06_Declarations.md#function_signature) [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause) <sub>可选</sub> [函数体](./06_Declarations.md#function_body) <sub>可选</sub>
> *函数声明* → [函数头](./06_Declarations.md#function_head) [函数名](./06_Declarations.md#function_name) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause)<sub>可选</sub> [函数签名](./06_Declarations.md#function_signature) [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause)<sub>可选</sub> [函数体](./06_Declarations.md#function_body)<sub>可选</sub>
>
> *函数头* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [声明描述符集](./06_Declarations.md#declaration_specifiers) <sub>可选</sub> **func**
> *函数头* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [声明描述符集](./06_Declarations.md#declaration_specifiers)<sub>可选</sub> **func**
>
> *函数名* → [标识符](./02_Lexical_Structure.md#identifier) | [运算符](./02_Lexical_Structure.md#operator)
>
> *函数签名* → [参数子句](./06_Declarations.md#parameter_clause) **throws** <sub>可选</sub> [函数结果](./06_Declarations.md#function_result) <sub>可选</sub>
> *函数签名* → [参数子句](./06_Declarations.md#parameter_clause) **throws**<sub>可选</sub> [函数结果](./06_Declarations.md#function_result)<sub>可选</sub>
>
> *函数签名* → [参数子句](./06_Declarations.md#parameter_clause) **rethrows** [函数结果](./06_Declarations.md#function_result) <sub>可选</sub>
> *函数签名* → [参数子句](./06_Declarations.md#parameter_clause) **rethrows** [函数结果](./06_Declarations.md#function_result)<sub>可选</sub>
>
> *函数结果* → **->** [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [类型](./03_Types.md#type)
> *函数结果* → **->** [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [类型](./03_Types.md#type)
>
> *函数体* → [代码块](./06_Declarations.md#code_block)
>
@ -160,11 +160,11 @@
>
> *参数集* → [参数](./06_Declarations.md#parameter) | [参数](./06_Declarations.md#parameter) **,** [参数集](./06_Declarations.md#parameter_list)
>
> *参数* → [外部参数名](./06_Declarations.md#parameter_name) <sub>可选</sub> [本地参数名](./06_Declarations.md#local_parameter_name) [类型注解](./03_Types.md#type_annotation) [默认参数子句](./06_Declarations.md#default_argument_clause) <sub>可选</sub>
> *参数* → [外部参数名](./06_Declarations.md#parameter_name)<sub>可选</sub> [本地参数名](./06_Declarations.md#local_parameter_name) [类型注解](./03_Types.md#type_annotation) [默认参数子句](./06_Declarations.md#default_argument_clause)<sub>可选</sub>
>
> *参数* → [外部参数名](./06_Declarations.md#parameter_name) <sub>可选</sub> [本地参数名](./06_Declarations.md#local_parameter_name) [类型注解](./03_Types.md#type_annotation)
> *参数* → [外部参数名](./06_Declarations.md#parameter_name)<sub>可选</sub> [本地参数名](./06_Declarations.md#local_parameter_name) [类型注解](./03_Types.md#type_annotation)
>
> *参数* → [外部参数名](./06_Declarations.md#parameter_name) <sub>可选</sub> [本地参数名](./06_Declarations.md#local_parameter_name) [类型注解](./03_Types.md#type_annotation) **...**
> *参数* → [外部参数名](./06_Declarations.md#parameter_name)<sub>可选</sub> [本地参数名](./06_Declarations.md#local_parameter_name) [类型注解](./03_Types.md#type_annotation) **...**
>
> *外部参数名* → [标识符](./02_Lexical_Structure.md#identifier)
>
@ -177,37 +177,37 @@
> 枚举声明语法
>
> *枚举声明* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier) <sub>可选</sub> [联合式枚举](./06_Declarations.md#union_style_enum)
> *枚举声明* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier)<sub>可选</sub> [联合式枚举](./06_Declarations.md#union_style_enum)
>
> *枚举声明* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier) <sub>可选</sub> [原始值式枚举](./06_Declarations.md#raw-value-style-enum)
> *枚举声明* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier)<sub>可选</sub> [原始值式枚举](./06_Declarations.md#raw-value-style-enum)
>
> *联合式枚举* → **indirect** <sub>可选</sub> **enum** [枚举名](./06_Declarations.md#enum_name) [泛型参数子句](./09_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> **{** [联合式枚举成员](./06_Declarations.md#union_style_enum_members) <sub>可选</sub> **}**
> *联合式枚举* → **indirect**<sub>可选</sub> **enum** [枚举名](./06_Declarations.md#enum_name) [泛型参数子句](./09_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> **{** [联合式枚举成员](./06_Declarations.md#union_style_enum_members)<sub>可选</sub> **}**
>
> *联合式枚举成员集* → [联合式枚举成员](./06_Declarations.md#union_style_enum_member) [联合样式枚举成员集](./06_Declarations.md#union_style_enum_members) <sub>可选</sub>
> *联合式枚举成员集* → [联合式枚举成员](./06_Declarations.md#union_style_enum_member) [联合样式枚举成员集](./06_Declarations.md#union_style_enum_members)<sub>可选</sub>
>
> *联合样式枚举成员* → [声明](./06_Declarations.md#declaration) | [联合式枚举 case 子句](./06_Declarations.md#union_style_enum_case_clause) | [编译控制语句](./05_Statements.md#compiler-control-statement)
>
> *联合式枚举 case 子句* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> **indirect** <sub>可选</sub> **case** [联合式枚举 case 集](./06_Declarations.md#union_style_enum_case_list)
> *联合式枚举 case 子句* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> **indirect**<sub>可选</sub> **case** [联合式枚举 case 集](./06_Declarations.md#union_style_enum_case_list)
>
> *联合式枚举 case 集* → [联合式枚举 case](./06_Declarations.md#union_style_enum_case) | [联合式枚举 case](./06_Declarations.md#union_style_enum_case) **,** [联合式枚举 case 集](./06_Declarations.md#union_style_enum_case_list)
>
> *联合式枚举 case* → [枚举的 case 名](./06_Declarations.md#enum_case_name) [元组类型](./03_Types.md#tuple_type) <sub>可选</sub>
> *联合式枚举 case* → [枚举的 case 名](./06_Declarations.md#enum_case_name) [元组类型](./03_Types.md#tuple_type)<sub>可选</sub>
>
> *枚举名* → [标识符](./02_Lexical_Structure.md#identifier)
>
> *枚举的 case 名* → [标识符](./02_Lexical_Structure.md#identifier)
>
> *原始值式枚举* → **enum** [枚举名](./06_Declarations.md#enum_name) [泛型参数子句](./09_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) <sub>可选</sub> **{** [原始值式枚举成员集](./06_Declarations.md#raw_value_style_enum_members) **}**
> *原始值式枚举* → **enum** [枚举名](./06_Declarations.md#enum_name) [泛型参数子句](./09_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)<sub>可选</sub> **{** [原始值式枚举成员集](./06_Declarations.md#raw_value_style_enum_members) **}**
>
> *原始值式枚举成员集* → [原始值式枚举成员](./06_Declarations.md#raw_value_style_enum_member) [原始值式枚举成员集](./06_Declarations.md#raw_value_style_enum_members) <sub>可选</sub>
> *原始值式枚举成员集* → [原始值式枚举成员](./06_Declarations.md#raw_value_style_enum_member) [原始值式枚举成员集](./06_Declarations.md#raw_value_style_enum_members)<sub>可选</sub>
>
> *原始值式枚举成员* → [声明](./06_Declarations.md#declaration) | [原始值式枚举 case 子句](./06_Declarations.md#raw_value_style_enum_case_clause) | [编译控制语句](./05_Statements.md#compiler-control-statement)
>
> *原始值式枚举 case 子句* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> **case** [原始值式枚举 case 集](./06_Declarations.md#raw_value_style_enum_case_list)
> *原始值式枚举 case 子句* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> **case** [原始值式枚举 case 集](./06_Declarations.md#raw_value_style_enum_case_list)
>
> *原始值式枚举 case 集* → [原始值式枚举 case](./06_Declarations.md#raw_value_style_enum_case) | [原始值式枚举 case](./06_Declarations.md#raw_value_style_enum_case) **,** [原始值式枚举 case 集](./06_Declarations.md#raw_value_style_enum_case_list)
>
> *原始值式枚举 case* → [枚举的 case 名](./06_Declarations.md#enum_case_name) [原始值赋值](./06_Declarations.md#raw_value_assignment) <sub>可选</sub>
> *原始值式枚举 case* → [枚举的 case 名](./06_Declarations.md#enum_case_name) [原始值赋值](./06_Declarations.md#raw_value_assignment)<sub>可选</sub>
>
> *原始值赋值* → **=** [原始值字面量](./02_Lexical_Structure.md#literal)
>
@ -218,13 +218,13 @@
> 结构体声明语法
>
> *结构体声明* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier) <sub>可选</sub> **struct** [结构体名称](./06_Declarations.md#struct_name) [泛型参数子句](./09_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](./06_Declarations.md#struct_body)
> *结构体声明* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier)<sub>可选</sub> **struct** [结构体名称](./06_Declarations.md#struct_name) [泛型参数子句](./09_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](./06_Declarations.md#struct_body)
>
> *结构体名称* → [标识符](./02_Lexical_Structure.md#identifier)
>
> *结构体主体* → **{** [结构体成员集](./06_Declarations.md#declarations) <sub>可选</sub> **}**
> *结构体主体* → **{** [结构体成员集](./06_Declarations.md#declarations)<sub>可选</sub> **}**
>
> *结构体成员集* → [结构体成员](./06_Declarations.md#declarations) [结构体成员集](./06_Declarations.md#declarations) <sub>可选</sub>
> *结构体成员集* → [结构体成员](./06_Declarations.md#declarations) [结构体成员集](./06_Declarations.md#declarations)<sub>可选</sub>
>
> *结构体成员* → [声明集](./06_Declarations.md#declarations) | [编译控制语句](./05_Statements.md#compiler-control-statement)
>
@ -233,15 +233,15 @@
> 类声明语法
>
> *类声明* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier) <sub>可选</sub> **final** <sub>可选</sub> **class** [类名](./06_Declarations.md#class_name) [泛型参数子句](./09_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) <sub>可选</sub> [类主体](./06_Declarations.md#class_body)
> *类声明* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier)<sub>可选</sub> **final**<sub>可选</sub> **class** [类名](./06_Declarations.md#class_name) [泛型参数子句](./09_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)<sub>可选</sub> [类主体](./06_Declarations.md#class_body)
>
> *类声明* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> **final** [访问级别修饰符](./07_Attributes.md#access-level-modifier) <sub>可选</sub> **class** [类名](./06_Declarations.md#class_name) [泛型参数子句](./09_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) <sub>可选</sub> [类主体](./06_Declarations.md#class_body)
> *类声明* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> **final** [访问级别修饰符](./07_Attributes.md#access-level-modifier)<sub>可选</sub> **class** [类名](./06_Declarations.md#class_name) [泛型参数子句](./09_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)<sub>可选</sub> [类主体](./06_Declarations.md#class_body)
>
> *类名* → [标识符](./02_Lexical_Structure.md#identifier)
>
> *类主体* → **{** [类成员集](./06_Declarations.md#declarations) <sub>可选</sub> **}**
> *类主体* → **{** [类成员集](./06_Declarations.md#declarations)<sub>可选</sub> **}**
>
> *类成员集* → [类成员](./06_Declarations.md#declarations) [类成员集](./06_Declarations.md#declarations) <sub>可选</sub>
> *类成员集* → [类成员](./06_Declarations.md#declarations) [类成员集](./06_Declarations.md#declarations)<sub>可选</sub>
>
> *类成员* → [声明集](./06_Declarations.md#declarations) | [编译控制语句](./05_Statements.md#compiler-control-statement)
>
@ -250,13 +250,13 @@
> 协议声明语法
>
> *协议声明* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier) <sub>可选</sub> **protocol** [协议名](./06_Declarations.md#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](./06_Declarations.md#protocol_body)
> *协议声明* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier)<sub>可选</sub> **protocol** [协议名](./06_Declarations.md#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](./06_Declarations.md#protocol_body)
>
> *协议名* → [标识符](./02_Lexical_Structure.md#identifier)
>
> *协议主体* → **{** [协议成员集](./06_Declarations.md#protocol_member_declarations) <sub>可选</sub> **}**
> *协议主体* → **{** [协议成员集](./06_Declarations.md#protocol_member_declarations)<sub>可选</sub> **}**
>
> *协议成员集* → [协议成员](./06_Declarations.md#declarations) [协议成员集](./06_Declarations.md#declarations) <sub>可选</sub>
> *协议成员集* → [协议成员](./06_Declarations.md#declarations) [协议成员集](./06_Declarations.md#declarations)<sub>可选</sub>
>
> *协议成员* → [协议成员声明](./06_Declarations.md#declarations) | [编译控制语句](./05_Statements.md#compiler-control-statement)
>
@ -284,45 +284,45 @@
> 协议方法声明语法
>
> *协议方法声明* → [函数头](./06_Declarations.md#function_head) [函数名](./06_Declarations.md#function_name) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause) <sub>可选</sub> [函数签名](./06_Declarations.md#function_signature) [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause) <sub>可选</sub>
> *协议方法声明* → [函数头](./06_Declarations.md#function_head) [函数名](./06_Declarations.md#function_name) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause)<sub>可选</sub> [函数签名](./06_Declarations.md#function_signature) [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause)<sub>可选</sub>
>
<!-- -->
> 协议构造器声明语法
>
> *协议构造器声明* → [构造器头](./06_Declarations.md#initializer_head) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause) <sub>可选</sub> [参数子句](./06_Declarations.md#parameter_clause) **throws** <sub>可选</sub> [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause) <sub>可选</sub>
> *协议构造器声明* → [构造器头](./06_Declarations.md#initializer_head) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause)<sub>可选</sub> [参数子句](./06_Declarations.md#parameter_clause) **throws**<sub>可选</sub> [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause)<sub>可选</sub>
>
> *协议构造器声明* → [构造器头](./06_Declarations.md#initializer_head) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause) <sub>可选</sub> [参数子句](./06_Declarations.md#parameter_clause) **rethrows** [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause) <sub>可选</sub>
> *协议构造器声明* → [构造器头](./06_Declarations.md#initializer_head) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause)<sub>可选</sub> [参数子句](./06_Declarations.md#parameter_clause) **rethrows** [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause)<sub>可选</sub>
>
<!-- -->
> 协议下标声明语法
>
> *协议下标声明* → [下标头](./06_Declarations.md#subscript_head) [下标结果](./06_Declarations.md#subscript_result) [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause) <sub>可选</sub> [getter-setter 关键字块](./06_Declarations.md#getter_setter_keyword_block)
> *协议下标声明* → [下标头](./06_Declarations.md#subscript_head) [下标结果](./06_Declarations.md#subscript_result) [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause)<sub>可选</sub> [getter-setter 关键字块](./06_Declarations.md#getter_setter_keyword_block)
>
<!-- -->
> 协议关联类型声明语法
>
> *协议关联类型声明* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier) <sub>可选</sub> **associatedtype** [类型别名](./06_Declarations.md#typealias_name) [类型继承子句](./03_Types.md#type_inheritance_clause) <sub>可选</sub> [类型别名赋值](./06_Declarations.md#typealias_assignment) <sub>可选</sub> [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause) <sub>可选</sub>
> *协议关联类型声明* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier)<sub>可选</sub> **associatedtype** [类型别名](./06_Declarations.md#typealias_name) [类型继承子句](./03_Types.md#type_inheritance_clause)<sub>可选</sub> [类型别名赋值](./06_Declarations.md#typealias_assignment)<sub>可选</sub> [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause)<sub>可选</sub>
>
<!-- -->
> 构造器声明语法
>
> *构造器声明* → [构造器头](./06_Declarations.md#initializer_head) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause) <sub>可选</sub> [参数子句](./06_Declarations.md#parameter_clause) **throws** <sub>可选</sub> [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause) <sub>可选</sub> [构造器主体](./06_Declarations.md#initializer_body)
> *构造器声明* → [构造器头](./06_Declarations.md#initializer_head) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause)<sub>可选</sub> [参数子句](./06_Declarations.md#parameter_clause) **throws**<sub>可选</sub> [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause)<sub>可选</sub> [构造器主体](./06_Declarations.md#initializer_body)
>
> *构造器声明* → [构造器头](./06_Declarations.md#initializer_head) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause) <sub>可选</sub> [参数子句](./06_Declarations.md#parameter_clause) **rethrows** [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause) <sub>可选</sub> [构造器主体](./06_Declarations.md#initializer_body)
> *构造器声明* → [构造器头](./06_Declarations.md#initializer_head) [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause)<sub>可选</sub> [参数子句](./06_Declarations.md#parameter_clause) **rethrows** [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause)<sub>可选</sub> [构造器主体](./06_Declarations.md#initializer_body)
>
> *构造器头（Head）* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [声明修饰符集](./06_Declarations.md#declaration_modifiers) <sub>可选</sub> **init**
> *构造器头（Head）* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [声明修饰符集](./06_Declarations.md#declaration_modifiers)<sub>可选</sub> **init**
>
> *构造器头（Head）* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [声明修饰符集](./06_Declarations.md#declaration_modifiers) <sub>可选</sub> **init ?**
> *构造器头（Head）* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [声明修饰符集](./06_Declarations.md#declaration_modifiers)<sub>可选</sub> **init ?**
>
> *构造器头（Head）* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [声明修饰符集](./06_Declarations.md#declaration_modifiers) <sub>可选</sub> **init !**
> *构造器头（Head）* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [声明修饰符集](./06_Declarations.md#declaration_modifiers)<sub>可选</sub> **init !**
>
> *构造器主体* → [代码块](./06_Declarations.md#code_block)
>
@ -331,18 +331,18 @@
> 析构器声明语法
>
> *析构器声明* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> **deinit** [代码块](./06_Declarations.md#code_block)
> *析构器声明* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> **deinit** [代码块](./06_Declarations.md#code_block)
>
<!-- -->
> 扩展声明语法
>
> *扩展声明* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier) <sub>可选</sub> **extension** [类型标识](./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](./06_Declarations.md#extension_body)
> *扩展声明* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [访问级别修饰符](./07_Attributes.md#access-level-modifier)<sub>可选</sub> **extension** [类型标识](./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](./06_Declarations.md#extension_body)
>
> *扩展主体* → **{** [扩展成员集](./06_Declarations.md#declarations) <sub>可选</sub> **}**
> *扩展主体* → **{** [扩展成员集](./06_Declarations.md#declarations)<sub>可选</sub> **}**
>
> *扩展成员集* → [扩展成员](./06_Declarations.md#declarations) [扩展成员集](./06_Declarations.md#declarations) <sub>可选</sub>
> *扩展成员集* → [扩展成员](./06_Declarations.md#declarations) [扩展成员集](./06_Declarations.md#declarations)<sub>可选</sub>
>
> *扩展成员* → [声明集](./06_Declarations.md#declarations) | [编译控制语句](./05_Statements.md#compiler-control-statement)
>
@ -351,15 +351,15 @@
> 下标声明语法
>
> *下标声明* → [下标头](./06_Declarations.md#subscript_head) [下标结果](./06_Declarations.md#subscript_result) [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause) <sub>可选</sub> [代码块](./06_Declarations.md#code_block)
> *下标声明* → [下标头](./06_Declarations.md#subscript_head) [下标结果](./06_Declarations.md#subscript_result) [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause)<sub>可选</sub> [代码块](./06_Declarations.md#code_block)
>
> *下标声明* → [下标头](./06_Declarations.md#subscript_head) [下标结果](./06_Declarations.md#subscript_result) [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause) <sub>可选</sub> [getter-setter 块](./06_Declarations.md#getter_setter_block)
> *下标声明* → [下标头](./06_Declarations.md#subscript_head) [下标结果](./06_Declarations.md#subscript_result) [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause)<sub>可选</sub> [getter-setter 块](./06_Declarations.md#getter_setter_block)
>
> *下标声明* → [下标头](./06_Declarations.md#subscript_head) [下标结果](./06_Declarations.md#subscript_result) [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause) <sub>可选</sub> [getter-setter 关键字块](./06_Declarations.md#getter_setter_keyword_block)
> *下标声明* → [下标头](./06_Declarations.md#subscript_head) [下标结果](./06_Declarations.md#subscript_result) [泛型 where 子句](./09_Generic_Parameters_and_Arguments.md#generic_where_clause)<sub>可选</sub> [getter-setter 关键字块](./06_Declarations.md#getter_setter_keyword_block)
>
> *下标头（Head）* → [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [声明修饰符集](./06_Declarations.md#declaration_modifiers) <sub>可选</sub> **subscript** [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause) <sub>可选</sub> [参数子句](./06_Declarations.md#parameter_clause)
> *下标头（Head）* → [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [声明修饰符集](./06_Declarations.md#declaration_modifiers)<sub>可选</sub> **subscript** [泛型参数子句](./09_Generic_Parameters_and_Arguments.md#generic_parameter_clause)<sub>可选</sub> [参数子句](./06_Declarations.md#parameter_clause)
>
> *下标结果（Result）* → **->** [属性集](./07_Attributes.md#attributes) <sub>可选</sub> [类型](./03_Types.md#type)
> *下标结果（Result）* → **->** [属性集](./07_Attributes.md#attributes)<sub>可选</sub> [类型](./03_Types.md#type)
>
<!-- -->
@ -372,16 +372,16 @@
>
> *后置运算符声明* → **postfix** **operator** [运算符](./02_Lexical_Structure.md#operator)
>
> *中置运算符声明* → **infix** **operator** [运算符](./02_Lexical_Structure.md#operator) [中置运算符属性集](./06_Declarations.md#infix_operator_attributes) <sub>可选</sub>
> *中置运算符声明* → **infix** **operator** [运算符](./02_Lexical_Structure.md#operator) [中置运算符属性集](./06_Declarations.md#infix_operator_attributes)<sub>可选</sub>
>
> *中置运算符属性集* → [优先级组名](./06_Declarations.md#precedence_group_name)
>
> 优先级组声明语法
>
> *优先级组声明* → **precedencegroup** [优先级组名](./06_Declarations.md#precedence_group_name) **{** [优先级组属性集](./06_Declarations.md#precedence_group_attributes) <sub>可选</sub> **}**
> *优先级组声明* → **precedencegroup** [优先级组名](./06_Declarations.md#precedence_group_name) **{** [优先级组属性集](./06_Declarations.md#precedence_group_attributes)<sub>可选</sub> **}**
>
> *优先级组属性集* → [优先级组属性](./06_Declarations.md#declarations) [优先级组属性集](./06_Declarations.md#declarations) <sub>可选</sub>
> *优先级组属性集* → [优先级组属性](./06_Declarations.md#declarations) [优先级组属性集](./06_Declarations.md#declarations)<sub>可选</sub>
>
> *优先级组属性* → [优先级组关系](./06_Declarations.md#declarations)
>
@ -415,7 +415,7 @@
>
> *声明修饰符* → [可变性修饰符](./07_Attributes.md#mutation-modifier)
>
> *声明修饰符集* → [声明修饰符](./06_Declarations.md#declaration_modifier) [声明修饰符集](./06_Declarations.md#declaration_modifiers) <sub>可选</sub>
> *声明修饰符集* → [声明修饰符](./06_Declarations.md#declaration_modifier) [声明修饰符集](./06_Declarations.md#declaration_modifiers)<sub>可选</sub>
>
> *访问级别修饰符* → **private** | **private(set)**
>
@ -434,21 +434,21 @@
> 属性语法
>
> *属性* → **@** [属性名](./07_Attributes.md#attribute_name) [属性参数子句](./07_Attributes.md#attribute_argument_clause) <sub>可选</sub>
> *属性* → **@** [属性名](./07_Attributes.md#attribute_name) [属性参数子句](./07_Attributes.md#attribute_argument_clause)<sub>可选</sub>
>
> *属性名* → [标识符](./02_Lexical_Structure.md#identifier)
>
> *属性参数子句* → **{** [平衡令牌集](./07_Attributes.md#balanced_tokens) <sub>可选</sub> **}**
> *属性参数子句* → **{** [平衡令牌集](./07_Attributes.md#balanced_tokens)<sub>可选</sub> **}**
>
> *属性（Attributes）集* → [属性](./07_Attributes.md#attribute) [属性集](./07_Attributes.md#attributes) <sub>可选</sub>
> *属性（Attributes）集* → [属性](./07_Attributes.md#attribute) [属性集](./07_Attributes.md#attributes)<sub>可选</sub>
>
> *平衡令牌集* → [平衡令牌](./07_Attributes.md#balanced_token) [平衡令牌集](./07_Attributes.md#balanced_tokens) <sub>可选</sub>
> *平衡令牌集* → [平衡令牌](./07_Attributes.md#balanced_token) [平衡令牌集](./07_Attributes.md#balanced_tokens)<sub>可选</sub>
>
> *平衡令牌* → **(** [平衡令牌集](./07_Attributes.md#balanced_tokens) <sub>可选</sub> **)**
> *平衡令牌* → **(** [平衡令牌集](./07_Attributes.md#balanced_tokens)<sub>可选</sub> **)**
>
> *平衡令牌* → **[** [平衡令牌集](./07_Attributes.md#balanced_tokens) <sub>可选</sub> **]**
> *平衡令牌* → **[** [平衡令牌集](./07_Attributes.md#balanced_tokens)<sub>可选</sub> **]**
>
> *平衡令牌* → **{** [平衡令牌集](./07_Attributes.md#balanced_tokens) <sub>可选</sub> **}**
> *平衡令牌* → **{** [平衡令牌集](./07_Attributes.md#balanced_tokens)<sub>可选</sub> **}**
>
> *平衡令牌* → 任意标识符、关键字、字面量或运算符
>
@ -460,13 +460,13 @@
> 模式语法
>
> *模式* → [通配符模式](./08_Patterns.md#wildcard_pattern) [类型注解](./03_Types.md#type_annotation) <sub>可选</sub>
> *模式* → [通配符模式](./08_Patterns.md#wildcard_pattern) [类型注解](./03_Types.md#type_annotation)<sub>可选</sub>
>
> *模式* → [标识符模式](./08_Patterns.md#identifier_pattern) [类型注解](./03_Types.md#type_annotati Value Bindingon ) <sub>可选</sub>
> *模式* → [标识符模式](./08_Patterns.md#identifier_pattern) [类型注解](./03_Types.md#type_annotati Value Bindingon )<sub>可选</sub>
>
> *模式* → [值绑定模式](./08_Patterns.md#value_binding_pattern)
>
> *模式* → [元组模式](./08_Patterns.md#tuple_pattern) [类型注解](./03_Types.md#type_annotation) <sub>可选</sub>
> *模式* → [元组模式](./08_Patterns.md#tuple_pattern) [类型注解](./03_Types.md#type_annotation)<sub>可选</sub>
>
> *模式* → [枚举 case 模式](./08_Patterns.md#enum_case_pattern)
>
@ -502,7 +502,7 @@
> 元组模式语法
>
> *元组模式* → **(** [元组模式元素集](./08_Patterns.md#tuple_pattern_element_list) <sub>可选</sub> **)**
> *元组模式* → **(** [元组模式元素集](./08_Patterns.md#tuple_pattern_element_list)<sub>可选</sub> **)**
>
> *元组模式元素集* → [元组模式元素](./08_Patterns.md#tuple_pattern_element) | [元组模式元素](./08_Patterns.md#tuple_pattern_element) **,** [元组模式元素集](./08_Patterns.md#tuple_pattern_element_list)
>
@ -513,7 +513,7 @@
> 枚举 case 模式语法
>
> *enum-case-pattern* → [类型标识](./03_Types.md#type_identifier) <sub>可选</sub> **.** [枚举 case 名](./06_Declarations.md#enum_case_name) [元组模式](./08_Patterns.md#tuple_pattern) <sub>可选</sub>
> *enum-case-pattern* → [类型标识](./03_Types.md#type_identifier)<sub>可选</sub> **.** [枚举 case 名](./06_Declarations.md#enum_case_name) [元组模式](./08_Patterns.md#tuple_pattern)<sub>可选</sub>
>
<!-- -->