T_COMMA
conv_pair : T_LPAREN T_CHAR T_COMMA T_CHAR T_RPAREN
| T_LPAREN T_SYMBOL T_COMMA T_CHAR T_RPAREN
| T_LPAREN T_SYMBOL T_COMMA T_SYMBOL T_RPAREN
| T_LPAREN T_CHAR T_COMMA T_SYMBOL T_RPAREN
order_arg : order_arg T_COMMA order_dir
%token T_COMMA
return (T_COMMA);
if (token == T_COMMA)
if (token == T_COMMA) /* null argument */
cx.x_token = T_COMMA;