2009/10/1 Daniele Barzotti

Hi,

I've a doubt about shared_ptr... Suppose to have something like this:

template<typename T> class Interface {..pure virtual..}

template<typename T> class Impl1 : public Interface<T> {....}

template<typename T> class Impl2 : public Interface<T> {....}

class A { public: Interface<int>* GetObjPtr() { return &obj; }

private: Impl2<int> obj; };

class B { ~B() { delete a_ptr; }

B() { a_ptr = new A; Int_ptr.reset( a_ptr->GetObjPtr );

I assume you mean Int_ptr.reset( a_ptr->GetObjPtr() );

}

private: A* a_ptr; shared_ptr< Interface<int> > Int_ptr; };

Where B creates and use A on its internal. In this case, is 'delete' called twice for Impl2?

Yes. When you passed a pointer to shared_ptr, you don't own this pointer anymore, so you shouldn't delete it manually. Roman Perepelitsa.