I am trying to migrate code to MSVS 2005.  I found some code trying to take
sizeof a member in a nested struct, see below.  I know the typedef is wacky,
probably a C coder who did not know C++ well.  Now, to me, neither sizeof()
looks right, I thought there were restrictions on that kind of thing.  
Apparently I can use the second variation, but that looks iffy to me as well.

Is the best(preferred?) way something like this?

S tempS; sizeof(tempS.x);

class  C
{
 typedef struct
 {
   int x;
  } S;
 void f()
 {
   sizeof(C::S::x); // Used to work
   this->S::x; // Still works
 }  
};