只有算术，枚举，指针，指向成员和允许类的类型参数。

Only arithmetic, enumeration, pointer, pointer to member, and class type arguments are allowed.

youdao

只有算术，枚举，指针，指向成员和允许类的类型参数。

Only arithmetic, enumeration, pointer, pointer to member, and class type arguments are allowed.

youdao