#include <iostream>
#include <memory>
#include <vector>
#include <deque>
#include <iterator>
using namespace std;

class SomeClass
{
    int data_;
public:
    SomeClass(int arg = 0) : data_(arg)
    {
        cout << "SomeClass ctor called: address=" << this << endl;
    }
    ~SomeClass()
    {
        cout << "SomeClass dtor called address=" << this << endl;
    }
    int data() const
    {
        return data_;
    }
    int& data()
    {
        return data_;
    }
};

int main ()
{
    unique_ptr<int> up1(new int(6));
    cout << "*up1=" << *up1 << endl << endl;

// unique_ptr<int> up2 = new int(7);  // Error
    unique_ptr<int> up2;
//    up2 = new int;   // Error assignment operator does not take pointer argument, except ..
    up2 = nullptr;
    up2 = make_unique<int>(5);  // requires C++14
    cout << "*up2=" << *up2 << endl;
    cout << "up2.get()=" << up2.get() << endl;
    cout << "*up2.get()=" << *up2.get() << endl << endl;

    // If you don't have C++14
    unique_ptr<int> up3 = unique_ptr<int>(new int(4));
    cout << "*up3=" << *up3 << endl << endl;

    // unique_ptrs with class
    auto upS1 = make_unique<SomeClass>(7);
    cout << "upS1->data()=" << upS1->data() << endl;
    upS1->data() *= 3;
    cout << "upS1->data()=" << upS1->data() << endl << endl;

    // unique_ptr with STL container
    auto upV = make_unique<vector<int>>();  // Note: parentheses required
    upV -> push_back(1);
    upV -> push_back(2);
    upV -> push_back(3);
    copy(upV->begin(), upV->end(),ostream_iterator<int>(cout," "));
    cout << endl << endl;

    deque<int> di={3,4,5,6,7};
    auto upDi = make_unique<deque<int>>(di);
    (*upDi)[2] = 77;
    for (auto value : *upDi) cout << value << ' ';
    cout << endl << endl;

    // release
    cout << "up1.get()=" << up1.get() << endl;
    auto ptr4up1 = up1.get();
    cout << "ptr4up1=" << ptr4up1 << endl;
    up1.release();   // Watch out for the leak!
    cout << "up1.get()=" << up1.get() << endl;
    cout << "*ptr4up1=" << *ptr4up1 << endl;
    delete ptr4up1;
    ptr4up1 = nullptr;
    cout << endl;

    // reset
    unique_ptr<int> up4(new int(4));
    cout << "up4.get()=" << up4.get() << endl;
    up4.reset();
    cout << "up4.get()=" << up4.get() << endl;
    up4 = make_unique<int>(44);
    cout << "up4.get()=" << up4.get() << endl;
    cout << "*up4=" << *up4 << endl;
    up4.reset(new int(444));
    cout << "up4.get()=" << up4.get() << endl;
    cout << "*up4=" << *up4 << endl << endl;

    auto upS2 = make_unique<SomeClass>(77);
    cout << "upS2->data()=" << upS2->data() << endl;
    upS2.reset();
    cout << endl;

    cout << "That's all folks!!!" << endl;
}