[boost] is_base_and_derived explanation?

From: John Maddock (john_maddock_at_[hidden])
Date: 2003-02-01 07:16:52

OK the new version of is_base_and_derived is checked in, along with stricter
test cases, can someone who understands the implementation (I'm absolutely
sure that I don't !), please provide an explanation to add to the header?

BTW I have looked at Terje's explanation, but the subtle changes to the
Reni's implementation make in no longer quite applicable (although I may be
missing something).

Many thanks,

John Maddock
http://ourworld.compuserve.com/homepages/john_maddock/index.htm