Pointer to class data member “::*”

Question

I came across this strange code snippet which compiles fine:

class Car
{
    public:
    int speed;
};

int main()
{
    int Car::*pSpeed = &Car::speed;
         


        

Answer 1

Just to add some use cases for @anon's & @Oktalist's answer, here's a great reading material about pointer-to-member-function and pointer-to-member-data.

https://www.dre.vanderbilt.edu/~schmidt/PDF/C++-ptmf4.pdf