#include <iostream>
#include <memory>
 
using namespace std;
 
 
 
struct Connection {
	Connection() {
		cout << "connection open" << endl;
	}
	~Connection() {
		cout << "connection closed" << endl;
	}
};
 
 
struct Reader {
	Reader(shared_ptr<Connection> c) : 
	c(c) {
		cout << "Reader created"  << endl;
	}
	~Reader() { 
		cout << "Reader deleted"  << endl;
	}
	shared_ptr<Connection> c;
};
 
 
struct Holder {
	shared_ptr<Connection> c;
	Reader* r;
	Holder() :
	c(make_unique<Connection>()) {
		cout << "Holder created"  << endl;
		r = new Reader(c);
	}
	~Holder() { 
		if (r) { delete r; }
		cout << "Holder deleted"  << endl;
	}
};
 
 
int main() {
	{
		Holder h;
	}
 
 
	{
		Holder h;
	}
 
    return 0;
}

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