Cohabitation of boost::shared_ptr and std::shared_ptr

Question

I want to use boost::log at some point, but I cannot pass a std::shared_ptr as a parameter, because the compiler (VS2010) cannot convert it into a

Answer 1

You could do it like this:

template<typename T>
boost::shared_ptr<T> make_shared_ptr(std::shared_ptr<T>& ptr)
{
    return boost::shared_ptr<T>(ptr.get(), [ptr](T*) mutable {ptr.reset();});
}

template<typename T>
std::shared_ptr<T> make_shared_ptr(boost::shared_ptr<T>& ptr)
{
    return std::shared_ptr<T>(ptr.get(), [ptr](T*) mutable {ptr.reset();});
}

EDIT: Note that this does not work with weak references to the source ptr. So be careful with those!