static int foo(void)
{
        switch () {
        case 0:
                return 0;
        default:
                return 1;
        }
}

static int bar(void)
{
        if ()
                return 0;
        else
                return 1;
}

/*
 * check-name: empty expression
 *
 * check-error-start
empty-expr.c:3:17: error: an expression is expected before ')'
empty-expr.c:13:13: error: an expression is expected before ')'
 * check-error-end
 */