listing.cpp

#include <iostream>
#include <vector>

// Printable = Number | String

class Printable {
public:
    virtual std::string toString() const = 0;
    virtual ~Printable() = default;
};

class Number : public Printable {
public:
    Number(int value) : value(value) {}

    std::string toString() const override {
        return std::to_string(value);
    }
private:
    int value;
};

class String : public Printable {
public:
    String(const std::string &value) : value(value) {}

    std::string toString() const override {
        return value;
    }
private:
    std::string value;
};

class Oseba : public Printable {
public:
    Oseba(const std::string &ime, const std::string &priimek) : ime(ime), priimek(priimek) {}

private:
    std::string toString() const override {
        return "Jaz sem: " + ime + " " + priimek;
    }
private:
    std::string ime;
    std::string priimek;
};

void print(const Printable &p) {
    std::cout << p.toString() << std::endl;
}

class View {
public:
    View(bool visible) : visible(visible) {}
    std::string draw() const {
        if (visible) {
            return doDraw();
        }
        return "";
    }

    virtual std::string toString() const = 0;

protected:
    std::string printVisiable() const {
        if (visible) {
            return "visible";
        } else {
            return "non visible";
        }
    }

private:
    virtual std::string doDraw() const = 0;
    bool visible;
};

class TextView : public View {
public:
    TextView(bool visible, const std::string &text) : View(visible), text(text) {}

    std::string doDraw() const override {
        return "text";
    }

    std::string toString() const override {
       return "TextView: " + text + "(" + printVisiable() + ")";
    }

private:
    std::string text;
};

class TestView : public View {
public:
    TestView(bool visible) : View(visible) {}

    std::string doDraw() const {
        return "text";
    }
};

int main() {
    TextView t(false, "test");
    std::cout << t.draw() << std::endl;
    std::cout << t.toString() << std::endl;
}