Function DataTypeLayout

cpp/src/arrow/type.h:122–124

  std::optional<BufferSpec> variadic_spec;

  explicit DataTypeLayout(std::vector<BufferSpec> buffers,
                          std::optional<BufferSpec> variadic_spec = {})
      : buffers(std::move(buffers)), variadic_spec(variadic_spec) {}
};

/// \brief Base class for all data types