Function AddWithOverflow

cpp/src/arrow/util/int_util_overflow.h:169–181

// Convenience functions over an arbitrary number of arguments
template <typename Int>
std::optional<Int> AddWithOverflow(std::initializer_list<Int> vs) {
  if (vs.size() == 0) {
    return {};
  }
  auto it = vs.begin();
  Int v = *it++;
  while (it != vs.end()) {
    if (ARROW_PREDICT_FALSE(AddWithOverflowGeneric(v, *it++, &v))) {
      return {};
    }
  }
  return v;
}

template <typename Int>
std::optional<Int> MultiplyWithOverflow(std::initializer_list<Int> vs) {