Function MaxInt

Bcore/src/main/cpp/base/bit_utils.h:304–313

// Generate maximum/minimum values for signed/unsigned n-bit integers
template <typename T>
constexpr T MaxInt(size_t bits) {
  DCHECK(std::is_unsigned<T>::value || bits > 0u) << "bits cannot be zero for signed.";
  DCHECK_LE(bits, BitSizeOf<T>());
  using unsigned_type = typename std::make_unsigned<T>::type;
  return bits == BitSizeOf<T>()
      ? std::numeric_limits<T>::max()
      : std::is_signed<T>::value
          ? ((bits == 1u) ? 0 : static_cast<T>(MaxInt<unsigned_type>(bits - 1)))
          : static_cast<T>(UINT64_C(1) << bits) - static_cast<T>(1);
}

template <typename T>
constexpr T MinInt(size_t bits) {