// Example of using our combo class with a vector.  This version is highly
// inefficient.  The print function in particular is badly written because it
// uses a value parameter (which makes an independent copy of the vector) and
// it uses a simple variable in the foreach loop that also makes a copy of each
// combo object.  We were able to see lots of messages about objects being
// constructed, copied, and destroyed.

#include <iostream>
#include <string>
#include <vector>

using namespace std;

class combo {
public:
    combo(int initial_value = 0, const string & initial_text = "foo") {
        value = initial_value;
        text = new string(initial_text);
        cout << "in regular constructor" << endl;
    }

    // copy constructor
    combo(const combo & rhs) {
        value = rhs.value;
        // default is shallow copy: text = rhs.text
        text = new string(*rhs.text);
        cout << "in copy constructor" << endl;
    }

    // assigment operator
    combo & operator=(const combo & rhs) {
        if (this != &rhs) {
            value = rhs.value;
            // default is shallow copy: text = rhs.text
            *text = *rhs.text;
        }
        cout << "in assignment operator" << endl;
        return *this;
    }

    // destructor
    ~combo() {
        delete text;
        cout << "in destructor with value = " << value << endl;
    }

    int get_value() const {
        return value;
    }

    const string & get_text() const {
        return *text;
    }

private:
    int value;
    string * text;
};

void print(vector<combo>  v) {
    cout << "entering foreach loop" << endl;
    for (combo c : v) {
        cout << c.get_value() << " " << c.get_text() << endl;
    }
}

int main() {
    vector<combo> v;
    v.push_back(combo(3, "bar"));
    v.push_back(combo(15, "baz"));
    v.push_back(combo(7, "mumble"));

    cout << "calling print:" << endl;
    print(v);

    return 0;
}