//

// Created by light on 19-12-22.

//

// nrvo example

#include <iostream>

using namespace std;

// Can copy and move

class A {

public:

A() { cout << "Create A\n"; }

~A() { cout << "Destroy A\n"; }

A(const A &) { cout << "Copy A\n"; }

A(A &&) { cout << "Move A\n"; }

A &operator=(const A &a) {

std::cout << "copy assignment" << std::endl;

return *this;

}

A &operator=(A &&a) {

cout << "move assignment\n";

return *this;

}

};

// 编译器可以优化 返回值移动出去

A getA_named() {

A a;

return a;

}

int main() {

// cout<<"拷贝"<<endl;

// auto a = getA_named();

cout << "赋值" << endl;

A aa;

aa = getA_named();

}