Method x

chapter24/src/test/java/com/seaofnodes/simple/Eval2.java:294–294

( Node n )

    private static Object not( NotNode not ) {
        Object n = val(not.in(1));
        return ( n==null || (n instanceof Double D && D==0.0) || n instanceof Long L && L==0 )
            ? 1L : 0L;
    }