Move Semantics

Moving transfers ownership from one object to another.

move_semantics.cpp

#include <iostream>
#include <memory>
#include <string>

int main() {
    std::string name = ;

    std::unique_ptr<std::string> original = std::make_unique<std::string>(name);
    std::unique_ptr<std::string> moved = std::move(original);

    std::cout << "originalEmpty=" << (original == nullptr) << std::endl;
    std::cout << "movedValue=" << *moved << std::endl;
    return 0;
}

#include <iostream>
#include <memory>
#include <string>

int main() {
    std::string name = ;

    std::unique_ptr<std::string> original = std::make_unique<std::string>(name);
    std::unique_ptr<std::string> moved = std::move(original);

    std::cout << "originalEmpty=" << (original == nullptr) << std::endl;
    std::cout << "movedValue=" << *moved << std::endl;
    return 0;
}

#include <iostream>
#include <memory>
#include <string>

int main() {
    std::string name = ;

    std::unique_ptr<std::string> original = std::make_unique<std::string>(name);
    std::unique_ptr<std::string> moved = std::move(original);

    std::cout << "originalEmpty=" << (original == nullptr) << std::endl;
    std::cout << "movedValue=" << *moved << std::endl;
    return 0;
}

move `std::move` allows movable objects such as `std::unique_ptr` to transfer ownership.