geekbrains_oop_cpp/lesson_7/Date.hpp

#ifndef DATE_HPP_
#define DATE_HPP_

#include <iostream>

class Date
{
private:
	int m_day;
	int m_month;
	int m_year;
public:
	Date(int day, int month, int year) : m_day(day), m_month(month), m_year(year) {}

	const int& getDay() const
	{
		return m_day;
	}

	const int& getMonth() const
	{
		return m_month;
	}

	const int& getYear() const
	{
		return m_year;
	}

	friend std::ostream& operator<<(std::ostream& os, const Date& d)
	{
		os << d.m_day << '.' << d.m_month << '.' << d.m_year;

		return os;
	}
};

template <class T>
class _ptr
{
private:
	T* m_ptr;
public:
	_ptr(T* ptr = nullptr) : m_ptr(ptr) {}
	~_ptr() { delete m_ptr; }

	_ptr(_ptr& p)
	{
		m_ptr = p.m_ptr;
		p.m_ptr = nullptr;
	}

	_ptr& operator=(_ptr& p)
	{
		if (&p == this)
			return *this;

		delete m_ptr;
		m_ptr = p.m_ptr;
		p.m_ptr = nullptr;

		return *this;
	}

	T& operator*() const { return *m_ptr; }
	T* operator->() const { return m_ptr; }

	bool isNull() const { return m_ptr == nullptr; }
};

const _ptr<Date>& compares_dates(const _ptr<Date>&, const _ptr<Date>&);

void exercise_1();
void exercise_2();

#endif