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#include <memory>
using namespace std;
class foo
{
public:
	unique_ptr<int> p;
	~foo()
	{
 
	}
};
int main()
{
	foo a, b;
	a = move(b);
	return 0;
}

prog.cpp: In function 'int main()':
prog.cpp:15:4: error: use of deleted function 'foo& foo::operator=(const foo&)'
  a = move(b);
    ^
prog.cpp:3:7: note: 'foo& foo::operator=(const foo&)' is implicitly deleted because the default definition would be ill-formed:
 class foo
       ^
prog.cpp:3:7: error: use of deleted function 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(const std::unique_ptr<_Tp, _Dp>&) [with _Tp = int; _Dp = std::default_delete<int>]'
In file included from /usr/include/c++/5/memory:81:0,
                 from prog.cpp:1:
/usr/include/c++/5/bits/unique_ptr.h:357:19: note: declared here
       unique_ptr& operator=(const unique_ptr&) = delete;
                   ^

Standard output is empty