Self-Assignment Guard in Action

1#include <iostream>
2#include <string>
3using namespace std;
4 
5class Account {
6    string m_name;
7public:
8    Account(const string& name) : m_name(name) {}
9    Account& operator=(const Account& other) {
10        if (this == &other) {
11            cout << "self " << m_name << endl;
12        } else {
13            cout << m_name << " <- " << other.m_name << endl;
14            m_name = other.m_name;
15        }
16        return *this;
17    }
18};
19 
20int main() {
21    Account a("a"), b("b");
22    a = a;
23    a = b;
24    Account& r = b;
25    b = r;
26    r = a;
27    return 0;
28}