[Boost-users] Static typing question

Hello all! I have a question on static typing. Does someone know or can imagine a way on producing unique static types. An example: typedef unsigned int some_type; typedef unsigned int other_type; typedef fusion::map< fusion::pair, fusion::pair > my_map; my_map my_map_(fusion::make_pair("some_type"), fusion::make_pair("other_type")); at_key(my_map) should return "other_type" and not "some_type" Many thanks in advance. With Kind Regards, Ovanes