Counting Copies and Moves Into a Parameter

1#include <iostream>
2#include <string>
3#include <utility>
4using namespace std;
5 
6class Tag {
7    string m_name;
8public:
9    Tag(const string& name) : m_name(name) { cout << "ctor " << m_name << endl; }
10    Tag(const Tag& other) : m_name(other.m_name) { cout << "copy " << m_name << endl; }
11    Tag(Tag&& other) noexcept : m_name(std::move(other.m_name)) {
12        other.m_name = "moved";
13        cout << "move " << m_name << endl;
14    }
15    ~Tag() { cout << "dtor " << m_name << endl; }
16};
17 
18void take(Tag t) {
19    cout << "take" << endl;
20}
21 
22int main() {
23    Tag a("a");
24    take(a);
25    take(std::move(a));
26    cout << "end" << endl;
27    return 0;
28}