This is already noted in the Queue readme, only the Queue constructs the type, the other 2 data structures are meant for PODs only. I will take a look at addin

This is already noted in the Queue readme, only the Queue constructs the type, the other 2 data structures are meant for PODs only. I will take a look at adding support for constructing in-place for the other 2 data structures, but at the moment, they are just for PODs.