JavaScript 中，块级作用域（block scope）一般是由一对花括号 { } 创建的。 if 、 for 、 while 后面的语句体，通常建议用花括号包裹，这个花括号就生成一个独立的词法环境。 而 switch 的写法比较特殊： ...

通过阅读本文，你将理解 Hermes 解析器如何复用业界成熟的 scope 分析用例来验证自身的 scopeManager 实现，掌握 global 、 block 、 function 、 module 、 class 等作用域类型在 let/const 、箭头函数、import、解构等场景下的精确语义，并了解这些测试在 Hermes 仓库中的组织方式、运行前提与源码级实现依据。

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