[Boost-users] [any] Converting between types

Hello, I'm trying to use boost::any to store a group of types. For value types everything works as expected. The problem is that i need to store some polymorphic types also. The following code explains what i'm trying to accomplish. #include class A {}; //base calss class B: public A {}; // derived class int main() {         B *b = new B(); //create derived class         boost::any n(b); // place inside boost::any                  /*          other part of code where i only know n contains a pointer to a class            derived from A         this will throw bad_any_cast: typeid(A*) != typeid (B*)         */         A* a = boost::any_cast(n);   } Is there any way of making boost::any_cast work work ok with "convertible" types? Or is there a way of storing different types of objects and having the possibility of retrieving them as compatible objects ? I've looked into any.hpp and found that it uses a typeid() equality test to see if the cast can be made. Can't there be a is_convertible test insted , at least for the case when is holding pointer to objects? Iulian -- Blessed is the man who, having nothing to say, abstains from giving wordy evidence of the fact. -- George Eliot