消除指向重载常量成员函数和成员运算符的指针的歧义

我有一个小类,具有以下成员函数:

class Point3 {
    Point3 operator - (Point3 const & p) const {...} 
    Point3 operator - () const {...}

    const float &x() const {...}
    float& x() {...}
}

&Point3::operator- 和 &Point3::x

在网上看到类似的问题时,我得出结论,进行这种类型的类型转换的语法是 (ReturnType (Class::*)(Args...)) &Class::Function . 但是,我尝试使用二进制运算符-但没有成功。

(Point3 (Point3::*)(Point3 const &)) &Point3::operator-

给予 error: address of overloaded function 'operator-' does not match required type 'Point3 (const Point3 &)' note: candidate function has different qualifiers (expected unqualified but found 'const') [...]

对于 x()