Method GetValue

r/src/r_to_arrow.cpp:223–227

template <>
int64_t RVectorIterator_ALTREP<int64_t>::GetValue(double x) {
  int64_t value;
  memcpy(&value, &x, sizeof(int64_t));
  return value;
}

template <typename Iterator, typename AppendNull, typename AppendValue>
Status VisitVector(Iterator it, int64_t n, AppendNull&& append_null,