#include <iostream>

using namespace std;

class A {
   public:
    A(int) {
        cout << "A constructed at " << this << " with " << i << " at " << &i << endl;
        this->i = i;
    }
    A() {
        cout << "A constructed at " << this << endl;
        this->i = 0;
    }
    A& operator=(const A& a) {
        cout << "A assign constructed at " << this << " with a at " << &a << endl;
        return *this;
    }
    ~A() { cout << "A destructed at " << this << " with val " << i << endl; }

   private:
    int i;
};

class Uniq {
   public:
    Uniq() {}
    void copy(Uniq& from) { *this = from; }
    void setVal(int val) { this->val = val; }
    int getVal() { return val; }

   private:
    Uniq(const Uniq&);
    Uniq& operator=(const Uniq& from) {
        cout << "Uniq hidden copy assign func called" << endl;
        val = from.val;
        return *this;
    }
    int val;
};

class Empty {
   public:
    Empty() { cout << "Empty constructed at " << this << endl; }
    ~Empty() { cout << "Empty destructed at " << this << endl; };
};

class B {
   private:
    int i;
    A a;

   public:
    B(A a)
        : a(a) {
        cout << "B constructed at " << this << " with A at " << &a << endl;
    }
    ~B() { cout << "B destructed at " << this << endl; }
};

int main() {
    cout << "construct via new" << endl;
    new Empty;
    cout << "construct in sizeof()" << endl;
    cout << __LINE__ << ": " << sizeof(*(new Empty)) << endl;
    A a;
    A aa = a;
    a = (const A&)aa;
    B b(a);
    B bb = b;
    Uniq u;
    u.setVal(15);
    cout << __LINE__ << ": " << u.getVal() << endl;
    // Uniq u1(u);
    // Uniq u2;
    // u2 = u;
    Uniq* u2 = new Uniq;
    cout << __LINE__ << ": " << u2->getVal() << endl;
    u2->copy(u);
    cout << __LINE__ << ": " << u2->getVal() << endl;
}