#include <iostream>
#include <memory>
 
template <typename T>
class SKOptionalPtr : public std::shared_ptr<T>
{
public:
    // inherited constructors.
    using std::shared_ptr<T>::shared_ptr;
 
    void weak(T* object)
    {
    	this->reset(object, [] (T*) {});
    }
};
 
int main() {
	SKOptionalPtr<int> ptr;
 
    // pointeur à détruire
    ptr.reset(new int(1));
 
    // pointer à ne pas détruire
    int already_allocated = 1234;
    ptr.weak(&already_allocated);
 
    std::cout << *ptr << std::endl;
 
	return 0;
}

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