swap - copy, move

swap을 move, copy 할때 차이점 코드

#include <stdio.h>
#include <iostream>

using namespace std;

class Test
{
private : 
	char *name;
public : 
	Test(const char* _name)  {
		cout << "동적할당 함." << endl;

		name = new char[strlen(_name) + 1];
		strcpy(name, _name);
		cout << " base constr" << endl; 
	}
	~Test() { 
		delete name;
		cout << " destr " << endl; 
	}
	Test(const Test &other) {
		name = new char[strlen(other.name) + 1];
		*name = *other.name;
		cout << " copy constr" << endl; 
	}
	Test(Test &&other) : name(other.name){
		other.name = 0;
		cout << " move constr" << endl; 
	}
	Test& operator=(const Test &other)
	{
		cout << "동적할당 함." << endl;
		name = new char[strlen(other.name) + 1];
		*name = *other.name;
		cout << "copy 대입" << endl;
		return *this;
	}
	
	Test& operator=(Test && other)
	{
		name = other.name;
		other.name = 0;
		cout << "move 연산자" << endl;
		return *this;
	}

	void print() const
	{
		cout << *name << endl;
	}
};

template <typename T>
void swap_won(T & _a, T & _b)
{
	// copy로 처리할 경우 
	// 동적할당 비용이 2번 더 발생함.
	T temp = (_a);
	_a = (_b);
	_b = (temp);

	// move로 처리할 경우.
	//T temp = move(_a);
	//_a = move(_b);
	//_b = move(temp);
	
}

int main()
{
	Test a("wontae");
	Test b("zzokki");
	
	a.print();
	b.print();
	swap_won<Test>(a, b);
	a.print();
	b.print();

}