[Boost-users] ptr_container: splice function in ptr_list

Hi there, I am using a ptr_list as a (huge) container where I can store objects (different types of a single interface). I am using a ptr_list as I need to store iterators to elements that do not invalidate when reordering the structure. Though a standard function of the STL list is missing: "splice". I know, I can mimic "splice" by "transfer", though I think that this results in a runtime complexity of O(N) whereas "splice" would be O(1). Is there a way to add splice to ptr_list? Or will there be problems I haven't thought of? If you give me some hint I could take a shot on this functionality. Detlef