def METHOD_NAME(p, w, left, rbp):
  """ For i++ and i--
  """
  if word.ArithId(w) == Id.Arith_DPlus:
    op_id = Id.Node_PostDPlus
  elif word.ArithId(w) == Id.Arith_DMinus:
    op_id = Id.Node_PostDMinus
  else:
    raise AssertionError
  child = tdop.ToLValue(left)
  return ast.UnaryAssign(op_id, child)