#include <iostream>
#include <memory>
using namespace std;
 
int main() {
	auto pstr = make_unique<string>(5, '*');
	cout << (pstr ? *pstr : "pstr is empty") << endl;
	unique_ptr<string> pstr2(pstr.release());
	// or: decltype(pstr) pstr2(pstr.release());
	cout << (pstr ? *pstr : "pstr is empty") << endl;
	cout << (pstr2 ? *pstr2 : "pstr2 is empty") << endl;
	auto pstr3(move(pstr2));
	// or: decltype(pstr2) pstr3(move(pstr2));
	cout << (pstr2 ? *pstr2 : "pstr2 is empty") << endl;
	cout << (pstr3 ? *pstr3 : "pstr3 is empty") << endl;
	return 0;
}

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