This error can be caused by a missing type specifier in the declaration of a pointer to a member.

造成这项错误的原因可能是：在成员指标的宣告中遗漏型别规范。

youdao

I find it easiest to mimic the pattern of structure declaration used in the official DDK, so I declared this device extension as a structure with a tag as well as a type and pointer-to-type name.

很容易模仿在正式的DD K种使用的结构声明的模式，所以我把这个设备扩展名声明称一个结构，伴随标签和类型以及类型指针名称。

youdao