pi_proc_macros 0.1.0

Utils Proc Macros
Documentation
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  • github:gaiaworld:dev zmaxleo

定义了一个trait Null, 该trait提供is_null方法用于判空。

u8、u16、u32, None等类型实现了Null, 如果你有一个u32类型的属性可能为空，并且您保证该数字不会达到它的最大值，那么你无需使用Option<u32>, 你可以用u32的最大值作为null，is_null发现self为u32::MAX时，将返回true