Trying out "moves" in C++

CMakeLists.txt

# Basic CMake project
cmake_minimum_required(VERSION 2.8.11)

# Name the project after the exercise
project(moving CXX)

set(CMAKE_CXX_FLAGS "-std=c++17 -Wall -Werror")

add_executable(moving moving.cpp)

moving.cpp

#include <iostream>
#include <string>

using namespace std;

class Thing {
public:
    Thing(const string label)
        : label(label)
        , instance(1)
    {
        log(__func__);
    }

    Thing(const Thing& other) {
        *this = other;
        log(string(__func__) + " copy");
    }

    Thing(const Thing&& other) {
        *this = std::move(other);
        log(string(__func__) + " move");
    }

    ~Thing() {
        log(__func__);
    }

    Thing& operator=(const Thing& other) {
        if (this != &other) {
            label = other.label;
            instance = other.instance + 1;
        }

        log(__func__);

        return *this;
    }
    Thing& operator=(const Thing&& other) {
        if (this != &other) {
            label = other.label;
            instance = other.instance + 1;
        }

        log(string(__func__) + " move");

        return *this;
    }
    const string& get_label() { return this->label; }
private:
    void log(const string_view func) {
        cout << "[" << func << "] " << label << instance << endl;
    }

    string label;
    int instance;
};

Thing copy_thing(Thing t) {
    cout << "[" << __func__ << "]" << endl;
    return t;
}

void call_me(Thing& t) {
    cout << "[" << __func__ << "(Thing& t)] " << t.get_label() << endl;
}

// void call_me(Thing t) {
//     cout << "[" << __func__ << "] " << t.get_label() << endl;
// }

void call_me(Thing&& t) {
    cout << "[" << __func__ << "(Thing&& t)] " << t.get_label() << endl;
}

int main() {
    // Thing a1("a");
    // cout << endl;
    // Thing a2(a1);
    // cout << endl;
    // Thing a3 = a2;
    // cout << endl;
    // Thing a4 = std::move(a3);
    // cout << endl;
    // auto b1 = make_unique<Thing>("b");
    // cout << endl;
    // Thing c1("c");
    // auto c2 = copy_thing(c1);
    // cout << endl;
    // auto d2 = copy_thing(Thing("d"));
    // cout << endl;

    auto a = Thing("a");
    call_me(a);
    cout << endl;
    call_me(std::move(a));
    cout << endl;
    // copy_thing(a);
    cout << endl;

    return 0;
}