#include <iostream>
#include <functional>
using namespace std;
 
class Functor : public std::function<bool()> {
public:
	virtual ~Functor() {};
	virtual bool operator()() const {return false;};
};
 
class FunctorTrue : public Functor{
public:
	bool operator()() const {return true;}
};
 
class Dispatcher {
public:
	const Functor & mFunctor; 
	Dispatcher(const Functor & functor): mFunctor(functor) {}
	Dispatcher(const Functor && functor): mFunctor(functor) {
		cout << "Constructor with rvalue" << endl;
	}
 
	void dispatch(){
		cout << boolalpha << mFunctor() << endl;
	}
};
 
int main() {
	Dispatcher dt = Dispatcher(FunctorTrue());
	dt.dispatch();
}

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