[boost] [fusion] Can you store noncopyable items in a fusion map?

Can you store non-copyable items in a fusion map? I'm just using it to map types to ptr_containers and I don't want to copy it ever. Windows works just fine but another compiler complains about not being able to create the implicit copy constructor for fusion::map. The documentation implies that a fusion::pair must be assignable and copyable in its expression semantics but I think this may be overly restrictive. Looking at the code it seems that I may need to make a noncopyable_map and noncopyable_pair to achieve this goal. Is this the easiest way? Thanks, Michael Marcin