Function ExecSpan

cpp/src/arrow/compute/exec.h:371–371

struct ARROW_EXPORT ExecSpan {
  ExecSpan() = default;
  ExecSpan(const ExecSpan& other) = default;
  ExecSpan& operator=(const ExecSpan& other) = default;
  ExecSpan(ExecSpan&& other) = default;
  ExecSpan& operator=(ExecSpan&& other) = default;