Method run_remaining

cpp/src/arrow/util/rle_encoding_internal.h:493–495

Return the number of values that are remaining in the current run.

  /// Return the number of values that are remaining in the current run.
  rle_size_t run_remaining() const {
    return std::visit([](const auto& dec) { return dec.remaining(); }, decoder_);
  }

  /// Get a batch of values from the current run and return the number elements read.
  [[nodiscard]] rle_size_t RunGetBatch(value_type* out, rle_size_t batch_size) {