Description:

连接两个元组，返回一个新元组

gen_circle(Circle,200.0,400.0,23.0)
gen_rectangle1(Rectangle,23.0,44.0,203.0,201.0)
concat_obj(Circle,Rectangle,CirclAndRectangle)

类似元组算子还有：

  1. count_obj
  2. copy_obj
  3. select_obj
  4. obj_to_integer
  5. integer_to_obj
  6. crop_part
  7. tile_images_offset