Function format_base2e

include/fmt/format.h:1293–1297

// Formats an unsigned integer in the power of two base (binary, octal, hex).
template <typename Char, typename UInt>
FMT_CONSTEXPR auto format_base2e(int base_bits, Char* out, UInt value,
                                 int num_digits, bool upper = false) -> Char* {
  do_format_base2e(base_bits, out, value, num_digits, upper);
  return out + num_digits;
}

template <typename Char, typename OutputIt, typename UInt,
          FMT_ENABLE_IF(is_back_insert_iterator<OutputIt>::value)>