[Boost-users] vector_indexing_suite issue

I am successfully using vector_indexing_suite in following code: class_<std::vector<B> >("vector_B") .def(vector_indexing_suite<std::vector<B> >()) ; However, I find that it requires that the B class conforms to the Equality Comparable concept where the STL standard only demands it to conform to the Assignable concept. I'm wondering if this is necessary, and if so how the operator== method should be coded. Can it simply always return true or false? Or compare "this" pointers?