Method MakeArray

cpp/src/arrow/util/rle_encoding_test.cc:1142–1169

  int32_t bit_width;

  std::shared_ptr<::arrow::Array> MakeArray(
      ::arrow::random::RandomArrayGenerator& rand) const {
    using Traits = arrow::TypeTraits<ArrowType>;

    std::vector<std::shared_ptr<::arrow::Array>> arrays = {};

    for (const auto& dyn_part : parts) {
      if (auto* part = std::get_if<RandomPart>(&dyn_part)) {
        auto arr = rand.Numeric<ArrowType>(part->size, /* min= */ value_type(0),
                                           part->max, part->null_probability);
        arrays.push_back(std::move(arr));

      } else if (auto* part = std::get_if<RepeatPart>(&dyn_part)) {
        auto arr =
            rand.Numeric<ArrowType>(part->size, /* min= */ part->value,
                                    /* max= */ part->value, part->null_probability);
        arrays.push_back(std::move(arr));

      } else if (auto* part = std::get_if<NullPart>(&dyn_part)) {
        EXPECT_OK_AND_ASSIGN(
            auto arr, ::arrow::MakeArrayOfNull(Traits::type_singleton(), part->size));
        arrays.push_back(std::move(arr));
      }
    }
    ARROW_DCHECK_EQ(parts.size(), arrays.size());

    return ::arrow::Concatenate(arrays).ValueOrDie();
  }
};

template <typename T>