Function MostSignificantBit

Bcore/src/main/cpp/base/bit_utils.h:106–111

// Find the bit position of the most significant bit (0-based), or -1 if there were no bits set.
template <typename T>
constexpr ssize_t MostSignificantBit(T value) {
  static_assert(std::is_integral<T>::value, "T must be integral");
  static_assert(std::is_unsigned<T>::value, "T must be unsigned");
  static_assert(std::numeric_limits<T>::radix == 2, "Unexpected radix!");
  return (value == 0) ? -1 : std::numeric_limits<T>::digits - 1 - CLZ(value);
}

// Find the bit position of the least significant bit (0-based), or -1 if there were no bits set.
template <typename T>