How to make_shared a derived class?

Question

I want to use the make_shared function with a derived class, like below

class Base {
     public:
     typedef std::shared_ptr          


        

Answer 1

std::shared_ptr has a converting constructor that can make a shared_ptr<Base> from a shared_ptr<Derived>, so the following should work:

#include <memory>
class Base {
    public:
    typedef std::shared_ptr<Base> Ptr;
};
class Derived : public Base {};

int main() {
    Base::Ptr myPtr = std::make_shared<Derived>();
}