move iterator

코드

#include <iostream>
using namespace std;
#include <string>
#include <vector>
#include <iostream>
#include <string>

class People
{
	std::string name;
public:
	People(std::string s) : name(s) {}

	People(const People& p) : name(p.name)
	{
		std::cout << "copy" << std::endl;
	}
	People(People&& p) noexcept : name(std::move(p.name))
	{
		std::cout << "move" << std::endl;
	}

	People& operator=(const People& p)
	{
		name = p.name;
		std::cout << "copy=" << std::endl;
		return *this;
	}

	People& operator=(People&& p) noexcept
	{
		name = std::move(p.name);
		std::cout << "move=" << std::endl;
		return *this;
	}
};

int main()
{
	vector<People> v;
	v.push_back(People("A"));
	v.push_back(People("B"));
	v.push_back(People("C"));
	v.push_back(People("D"));
	cout << "v의 size는" << v.size() << endl;
	cout << "------------------------" << endl;

	//vector<People> v2(begin(v), end(v));
	cout << "v2 부분" << endl;
	vector<People> v2(make_move_iterator(begin(v)),
		make_move_iterator(end(v)));
	cout << "v의 size는" << v.size() << endl;
	cout << "v2의 size는" << v2.size() << endl;
	
	cout << "v3 부분" << endl;
	vector<People> v3(move(v2));
	cout << "v의 size는" << v.size() << endl;
	cout << "v2의 size는" << v2.size() << endl;
	cout << "v3의 size는" << v3.size() << endl;

	cout << "hello" << endl;
	/*
		auto p1 = begin(v);
		People peo1 = *p1; // 복사 생성자..
		// 방법 1.
		move_iterator< vector<People>::iterator > p2(p1);
		People peo2 = *p2; // move 생성자..
		//People peo3 = move(*p1); // move 생성자..
		// 방법 2.
		auto p3 = make_move_iterator(begin(v));
	*/
}

결과가 다름...