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feat：更新 GRAMMAR OF A PRECEDENCE GROUP DECLARATION

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chenxi
2021-09-01 23:31:31 +08:00
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source/03_language_reference/06_Declarations.md
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@ -1754,11 +1754,11 @@ Swift 定义了大量的优先级组来与标准库的运算符配合使用，
>
#### 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> }
> *优先级组声明* → **precedencegroup** [优先级组名称](#precedence-group-name) **{** [多优先级组属性](#precedence-group-attributes)<sub>可选</sub> **}**
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#### 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> **{** **}**
> *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>
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#### precedence-group-attribute {#precedence-group-attribute}
@ -1771,30 +1771,30 @@ Swift 定义了大量的优先级组来与标准库的运算符配合使用，
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#### precedence-group-relation {#precedence-group-relation}
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> *优先级组关系* → **higherThan:**[多优先级组名称](#precedence-group-names)
> *优先级组关系* → **higherThan** **:** [多优先级组名称](#precedence-group-names)
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> *优先级组关系* → **lowerThan:**[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}
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> *优先级组赋值* → **assignment:**[布尔字面值](./02_Lexical_Structure.md#boolean-literal)
> *优先级组赋值* → **assignment** **:** [布尔字面值](./02_Lexical_Structure.md#boolean-literal)
>
#### precedence-group-associativity {#precedence-group-associativity}
> *优先级组结合性* → **associativity:left**
> *优先级组结合性* → **associativity** **:** **left**
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> *优先级组结合性* → **associativity:right**
> *优先级组结合性* → **associativity** **:** **right**
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> *优先级组结合性* → **associativity:none**
> *优先级组结合性* → **associativity** **:** **none**
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#### 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)
> *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) **,** [多优先级组名称](#precedence-group-names)
>
#### precedence-group-name {#precedence-group-name}
> *优先级组名称* →[标识符](./02_Lexical_Structure.md#identifier)
> *优先级组名称* → [标识符](./02_Lexical_Structure.md#identifier)
>
## 声明修饰符 {#Declaration-Modifiers}