Is there any difference between “T” and “const T” in template parameter?

Question

Is there any difference between following 2 syntax:

template struct A;         // (1)

and

template

        

Answer 1

The choice of int was probably a bad idea, it makes a difference for pointers though:

class A
{
public:
    int Counter;
};

A a;


template 
struct Coin
{
    static void DoStuff()
    {
        ++a->Counter; // won't compile if using const A* !!
    }
};

Coin<&a>::DoStuff();
cout << a.Counter << endl;