How come a non-const reference cannot bind to a temporary object?

Question

Why is it not allowed to get non-const reference to a temporary object, which function getx() returns? Clearly, this is prohibited by C++ Standard but I am in

Answer 1

The evil workaround involves the 'mutable' keyword. Actually being evil is left as an exercise for the reader. Or see here: http://www.ddj.com/cpp/184403758