#include <iostream>
#include <utility>
 
struct X
{
	int n_;
 
	explicit X(int n) : n_(n) { std::cout << "Construct: " << n_ << "\n"; }
	X(X const & rhs) : n_(rhs.n_) { std::cout << "X copy:" << n_ << "\n"; }
	X(X && rhs) : n_(rhs.n_) { rhs.n_ = -1; std::cout << "X move:" << n_ << "\n"; }
	~X() { std::cout << "Destroy: " << n_ << "\n"; }
};
 
struct A
{
	explicit A(X x) : x_(std::move(x)) {};
	X x_;
};
 
struct B
{
	X x;
};
 
int main()
{
	A a(X(12));
	B b { X(24) };
}

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