Unable to compile using C++ 26 (probably C++ 20 or above) #433

fastfloat_really_inline FASTFLOAT_CONSTEXPR20 void
loop_parse_if_eight_digits(char const *&p, char const *const pend,
                           uint64_t &i) {
  // optimizes better than parse_if_eight_digits_unrolled() for UC = char.
  while ((tinyobj_ff::distance(p, pend) >= 8) &&
         is_made_of_eight_digits_fast(read8_to_u64(p))) {
    i = i * 100000000 +
        parse_eight_digits_unrolled(read8_to_u64(
            p)); // in rare cases, this will overflow, but that's ok
    p += 8;
  }
}

// --- distance ---
template <typename It>
inline typename conditional<true, long long, It>::type
distance(It first, It last) {
  return last - first;
}