Mask.h

#ifndef PACKING_UTILITY_MASK_H_
#define PACKING_UTILITY_MASK_H_
 
namespace packing {
namespace utility {
 
template <short N>
struct mask_backend {
  static const uint64_t value = (1ul << N) - 1ul;
};
struct mask_backend {…};
 
template <short N>
constexpr uint64_t mask = mask_backend<N>::value;
 
}  // namespace utility
}  // namespace packing
 
#endif  // PACKING_UTILITY_MASK_H_