Type checking mention

main(void) {
        char *a = "trying to fool the compiler, ha!";

        switch (a) {
        default:
                break;
        }
}
Switch value must be an integer
/* in AST: */
case SWITCH:
      if (!is_INTEGRALTYPE(LTYPE(tree)) {
            complain, we've a bonehead!!!!!!
      } else call routine..