[boost] [type_index] C++03 implementation in boost?

After crafting my own `type_info_ptr` as a thin wrapper to be able to use `std::type_info` as key in maps, I found out about the new `std::type_index` in C++11. It seems that a C++03 implementation would be trivial, except for the hashing functionality. Could that functionality be built by leveraging implementation specific details like whether there is only one `type_info` instance for each type, or whether the name member function returns distinct values? I believe it would be a nice addition to Boost, perhaps as part of the utility library. It would be useful for those wanting to use C++11 features while still writing C++03 compatible code. Agustín K-ballo Bergé.- http://fusionfenix.com