[boost] [unordered] a strange limitation for move emulation in Boost.Unordered

Here: http://www.boost.org/doc/html/unordered/compliance.html#unordered.compliance... it reads: "Non-copyable objects can be stored in the containers, but without support for rvalue references the container will not be movable." Why not? Container movement does not ever touch its elements, so I don't see the connection. Joaquín M López Muñoz Telefónica Digital