如题，在引入Carbon.h头文件的时候，报错：
详细的报错信息：
In included file: non-defining declaration of enumeration with a fixed underlying type is only permitted as a standalone declaration; missing list of enumerators?
CFBase.h:474:9: error occurred here网上搜不到相关的解答，索性将源文件的后缀名改成了.mm，神奇般的不报错了，而且编译也通过，运行也正常
