// rval.cpp
#include <iostream>
using namespace std;

class X
{
public:
	X()
	{
		cout << "Def ctor\n";
	}
	~X()
	{
		cout << "Def dtor\n";
	}
	X(const X& )
	{
		cout << "Def cpyctor\n";
	}
	void Msg()
	{
		cout << "Showing a message\n";
	}
	X& operator=(X& )
	{
		cout << "= op\n";
		return *this;
	}
};

X fun()
{
	cout << "In fun(), before X x;\n";
	X x;
	cout << "In fun(), after X x;\n";
	return x;
}

int main()
{
	X&& x = fun();
	x.Msg();
	return 0;
}