Yup. It's possible to do that. My point was that if you want to do that you break the encapsulation, i.e. contained object would have to know about its container(s). This applies to Boost intrusive lists as well AFAICS.
class person
{
protected:
int age;
int wieght;
};
template <class Base>
class people: public Base
{
private:
Base *prev;
Base *next;
};
people<person> plist;