#include <iostream>
#include <functional>
#include <exception>

using namespace std;


class Foo {
    public:
    virtual void print() = 0;
};

class Bar : public Foo {
    public:
    void print() {
        std::cout << "I'm bar!\n";
    }
};

template <typename T>
std::function<void(Foo*)> make_wrapper(std::function<void(T)> fct) {
    return [fct](Foo* event) {
        T* x = dynamic_cast<T*>(event);
        fct(*x);
    };
}

int main(void) {
    Bar x = Bar();
    Foo* y = &x;

    make_wrapper<Bar>([](Bar z){z.print();})(y);
    return 0;
}