[Boost-users] intrusive_ptr and incomplete types 2

Peter Dimov <pdimov <at> pdimov.com> writes:

This doesn't answer your question, but if you add

void intrusive_ptr_add_ref( A* ); void intrusive_ptr_release( A* );

you can copy intrusive_ptr<A> instances around freely. This achieves a level of incomplete type support that matches shared_ptr<A>.

I think this gives some linker error. In our code we often use a refcount base class, e.g: class A : public RefCount { }; for the RefCount class has the functions are defined: void intrusive_ptr_add_ref( RefCount* ); void intrusive_ptr_release( RefCount* ); and there is the problem: a fwd decl. is not enough for the compiler to figure out that a matches the RefCount functions.