Hi, alls Just wondering if there is some issue to the following problem (a and b instance are not in the same block code in true life of course) : class A; class B : public A ... void main() { shared_ptr<A> a; shared_ptr<B> b(new B); a = b; // what i would like, but it wont compile: no copy ctor available } I can try to do something like: void main() { shared_ptr<A> a; shared_ptr<B> b(new B); a.reset(b.get()); // bad design, reference counter corruped } I do not want to do something like the following, because each time i will need of b, i will be obliged to cast again to B type. main() { shared_ptr<A> a; shared_ptr<A> b(dynamic_cast(new B)); a = b; } Any solutions ? --------------------------------- Yahoo! Mail -- Une adresse @yahoo.fr gratuite et en français ! [Non-text portions of this message have been removed]