docs: def weld_range(start, stop, step):
      """Create a vector for the range parameters above.
  
      Parameters
      ----------
      start : int
      stop : int or WeldObject
          Could be the lazily computed length of a WeldObject vec.
      step : int
  
      Returns
      -------
      WeldObject
          Representation of this computation.
  
      """
      if isinstance(stop, WeldObject):
          obj_id, weld_obj = create_weld_object(stop)
          stop = obj_id
      else:
          weld_obj = create_empty_weld_object()
  
      weld_template = """result(
      for(
          rangeiter({start}L, {stop}, {step}L),
          appender[i64],
          |b: appender[i64], i: i64, e: i64| 
              merge(b, e)
      )
  )"""
  
      stop = '{}L'.format(stop) if isinstance(stop, int) else stop
  
      weld_obj.weld_code = weld_template.format(start=start,
                                                stop=stop,
                                                step=step)
  
      return weld_obj