anchor.diff:  expr :
        short_or_expr
     |  t_AT t_FILLER? input_params t_FILLER? expr
  -  |  t_COLON //really only applies in args, but let Natlab handle that
  +  //|  t_COLON //really only applies in args, but let Natlab handle that
     ;
   
   short_or_expr :
  
positive.code: 
  quiet_element_separator_comma :
       dt_COMMA -> template() "" //delete comma
    ;
  
  input_params :
       t_LPAREN t_FILLER? (param_list t_FILLER?)? t_RPAREN
    ;
  
  param_list :
       name (t_FILLER? t_COMMA t_FILLER? name)*
    ;
  
  name :
  
negative.code:   |  cell_array
    |  access
    |  t_AT t_FILLER? name
    //|  t_END //really only applies in args, but let Natlab handle that
    ;
  
  access :
  