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GorgonMeducer avatar GorgonMeducer commented on September 24, 2024

这也是一个结构性的东西。有时候,当你定义一个复杂结构的时候,可能有些“通过宏”来隐藏的结构仅仅在 def_xxxxx 里面实现就足够了,但有时候很不幸,光靠 def_xxxx是做不到的,因为语法上需要有些结构必须出现在类型定义的后方,这时候 end_def_class()就可以发挥作用了。

因为很多时候,我们并不知道未来会发生什么,为了代码保持一致性(较好的兼容性),所以在语法糖里引入 def_xxxx 和 end_def_xxxx ,这样哪怕def_xxxx和end_def_xxx 的实现发生了变化,对用户已有的代码来说都不会有影响。

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