'postfix_expression  : postfix_expression PERIOD ID
| postfix_expression PERIOD TYPEID
| postfix_expression ARROW ID
| postfix_expression ARROW TYPEID'

def p_postfix_expression_4(self, p):

    field = c_ast.ID(p[3], self._coord(p.lineno(3)))
    p[0] = c_ast.StructRef(p[1], p[2], field, p[1].coord)
