The move function really does very little work. All move does is accept either an lvalue or rvalue argument, and return it as an rvalue without triggering a copy construction:
template <class T> typename remove_reference<T>::type &&move(T &&a) { return a; } It is now up to client code to overload key functions on whether their argument is an lvalue or rvalue (e.g. copy constructor and assignment operator). When the argument is an lvalue, the argument must be copied from. When it is an rvalue, it can safely be moved from.
