if (@structure@->@opt_var@_arg)
  {
    for (i = 0; i < @structure@->@opt_var@_given; ++i)
      {
@IF@ has_string_type @THEN@
        if (@structure@->@opt_var@_arg [i])
          {
            free (@structure@->@opt_var@_arg [i]); /* free @comment@ */
            @structure@->@opt_var@_arg [i] = 0;
          }
@ENDIF@
        if (@structure@->@opt_var@_orig [i])
          {
            free (@structure@->@opt_var@_orig [i]); /* free @comment@ */
            @structure@->@opt_var@_orig [i] = 0;
          }
      }
@IF@ has_string_type @THEN@
    if (@structure@->@opt_var@_arg [0])
      free (@structure@->@opt_var@_arg [0]); /* free default string */
@ENDIF@
    free (@structure@->@opt_var@_arg); /* free @comment@ */
    @structure@->@opt_var@_arg = 0;
    free (@structure@->@opt_var@_orig); /* free @comment@ */
    @structure@->@opt_var@_orig = 0;
  }