C++ binary constant/literal

Question

I\'m using a well known template to allow binary constants

template< unsigned long long N >
struct binary
{
  enum { value = (N % 10) + 2 * binary<          


        

Answer 1

template struct BinaryDigit 
{
  enum  { value = p*2+i };
  typedef BinaryDigit O;
  typedef BinaryDigit I;
};
struct Bin
{
  typedef BinaryDigit<0,0> O;
  typedef BinaryDigit<0,1> I;
};

Allowing:

Bin::O::I::I::O::O::value

much more verbose, but no limits (until you hit the size of an unsigned int of course).