Function FormatToBuffer

cpp/src/arrow/scalar.cc:1085–1091

// helper for StringFormatter
template <typename Formatter, typename ScalarType>
std::shared_ptr<Buffer> FormatToBuffer(Formatter&& formatter, const ScalarType& from) {
  if (!from.is_valid) {
    return Buffer::FromString("null");
  }
  return formatter(
      from.value, [&](std::string_view v) { return Buffer::FromString(std::string(v)); });
}

// error fallback
template <typename To>