Compiler Error C2800

'operator operator' cannot be overloaded

The specified operator was overloaded.

The following operators cannot be overloaded: class member access operator (.), pointer to member operator (.*), scope resolution operator (::), conditional expression operator (? :), and sizeof operator.

The following is an example of this error:

 class C
 {
    operator:: ();  // error :: is overloaded
 };