c++ - 指向类的静态成员的指针

Question

来自这个引用:

(8.3.3/3) A pointer to member shall not point to a static member of a class (9.4), a member with reference type, or "cv void."

为什么指针不能指向类的静态成员？

struct S {
     static int f() { /*...*/ };

};

int main()
{
     int (S::*s)() = &S::f; // why?
}

Answer 1

Why a pointer cannot point to a static member of a class?

因为出于成员资格的目的，它不是成员，仅出于范围的目的。除了范围之外，静态成员就像自由函数一样，不附加到类的实例。您可以使用非成员函数指针:

int (*s)() = &S::f;