C++程序设计方法3：移动构造函数

#include <iostream>
using namespace std;

class Test
{
public:
    int *buf;//only for demo
    Test()
    {
        buf = new int(3);
        cout << "Test():this->buf@ " << hex << buf << endl;
    }
    ~Test()
    {
        cout << "~Test(): this->buf@" << hex << buf << endl;
        if (buf)
            delete buf;
    }

    Test(const Test& t) :buf(new int(*t.buf))
    {
        cout << "Test(const Test&) called.this->buf@" << hex << buf << endl;
    }

    Test(Test&& t) :buf(t.buf)
    {
        cout << "Test(Test&&) called.this->buf@" << hex << buf << endl;
        t.buf = nullptr;
    }
};

Test GetTemp()
{
    Test tmp;
    cout << "GetTemp(): tmp.buf@" << hex << tmp.buf << endl;
    return tmp;//返回给未知名字的对象
}

void fun(Test t)
{
    cout << "fun(Test t):t.buf@ " << hex << t.buf << endl;
}

int main()
{
    Test a = GetTemp();
    cout << "main():a.buf@" << hex << a.buf << endl;
    fun(a);//拷贝调用
    return 0;
}