How to generate a compiler warning/error when object sliced

Question

I want to know if it is possible to let compiler issue a warning/error for code as following:

Note:

1. Yea, it is bad programming style and

Answer 1

Not really a solution to your immediate problem, but....

Most functions that take class/struct objects as parameters should declare the parameters to be of type "const X&" or "X&", unless they have a very good reason not to.

If you always do this, object slicing will never be a problem (references don't get sliced!).