main.cpp

/*********************************************************
	  File Name: main.cpp
	  Author: Abby Cin
	  Mail: abbytsing@gmail.com
	  Created Time: Thu 04 Apr 2019 01:42:50 PM DST
**********************************************************/

#include "optional.h"
#include <iostream>

struct Bar {
	explicit Bar(int z) : z_ { z }
	{
	}
	virtual ~Bar()
	{
	}
	int z_;
};

struct Foo : Bar {
	Foo(int x, int y, int z) : Bar { z }, x_ { x }, y_ { y }
	{
	}
	int x_;
	int y_;
};

int main()
{
	std::cerr << std::boolalpha;

	Optional<Bar> b { Bar { 1 } };
	Optional<Bar> h = b;
	Optional<Foo> o { 1, 2, 3 };

	Optional<Foo> l { Foo { 3, 2, 1 } };
	std::cerr << (bool)l << '\t' << o->x_ << '\n';

	o = std::move(l);

	std::cerr << (bool)l << '\t' << o->x_ << '\n';

	l = o;

	std::cerr << (bool)l << '\t' << o->x_ << '\n';

	l = Foo { 2, 2, 2 };
	o = std::move(l);
	std::cerr << (bool)l << '\t' << o->x_ << '\n';

	Optional<Foo> m = o;
	std::cerr << (bool)m << '\t' << m->x_ << '\n';

	Optional<int> io { 1 };
	Optional<int> ha {};
	io = Optional<int>();
	std::cerr << (bool)io << '\n';
	io = ha;
	std::cerr << (bool)io << '\n';
}