On 02/07/2012 01:11 a.m., Robert Ramey wrote:
Agustín K-ballo Bergé wrote:
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
It sounds like this might be similar to the "extended_type_info" used in the serialization library for many years.
Robert Ramey
It's considerably simpler than `extended_type_info`. It's just a wrapper around a `std::type_info const*` that is usable as a key in associative sequences (both ordered and unordered). Nothing more, nothing less. Agustín K-ballo Bergé.- http://fusionfenix.com