Re: enum and operator++

Dear all
I am struggling with a problem that's simple per se.
I have an enum and a prefix ++ operator:
enum Dir { North = 1, East = 2, South = 3, West = 4, Max_ = 5 }; //
clockwise

Dir operator++(Dir d)
{
   Dir dd;
   switch (d) {
   case North:
     dd = East;
     break;
   case East:
     dd = South;
     break;
   case South:
     dd = West;
     break;
   case West: // wrap
     dd = North;
     break;
   };

   return dd;
}

void f()
{
    for (Dir d = North; d< Max_; ++d)

     // do something
}

The problem is: in the above loop the ++ doesn't work,
indeed the loop is infinite. If you replace // do something with
output statement, it prints 1 forever.

It is really annoying.

please throw a ligth.

Regards,
   -- Saeed Amrollahi