Is there equivalent of <? extends T>, <? super T> in C++?

Question

1. Is there equivalent of , in C++?

2. Also, does ,

Answer 1

This is an extension that sadly was removed from the draft standard of C++0x as it "was not ready". However, it is possible to simulate this using static asserts (that is a part of C++0x and Boost as people have mentioned here).