binary.h

#pragma once
 
namespace mel
{
    namespace mpl
    {
        template <unsigned long number>
        struct binary
        {
            static unsigned const value
                = binary<number/10>::value << 1   
                | number%10;                 
        };
 
        template <>                          
        struct binary<0>                     
        {
            static unsigned const value = 0;
        };
 
    }
}