Method count

cpp/src/arrow/compute/kernels/aggregate_var_std.cc:59–59

  double ToDouble(const Decimal256& value) const { return value.ToDouble(decimal_scale); }

  int64_t count() const { return moments.count; }

  void Consume(const ArraySpan& array) {
    constexpr bool kCanUseIntArithmetic = std::is_integral_v<CType> && sizeof(CType) <= 4;