The access privilege of friendship is not inherited:
- I may trust you, but I don’t necessarily trust your kids.
- My friends aren’t necessarily friends of my kids.
Base' declares f() to be a friend, but f() has no special access rights with classDerived’.
The access privilege of friendship is not transitive:
- I may trust you, and you may trust Sam, but that doesn’t necessarily mean
that I trust Sam.
- A friend of a friend is not necessarily a friend.