Effective C++: discouraging protected inheritance?

Question

I was reading Scott Meyers\' Effective C++ (third edition), and in a paragraph in Item 32: Make sure public inheritance is \"is-a\" on page 151 he make

Answer 1

He isn't exactly discouraging protected inheritance, he just says that he hasn't found any good use for it. I haven't seen anyone either elsewhere.

If you happen to find a couple of really useful use cases, you might have material to write a book too. :-)