Unique Ptr

std::unique_ptr gives one owner responsibility for an object.

unique_ptr.cpp

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

class Note {
private:
    std::string text;

public:
    Note(std::string value) {
        text = value;
    }

    std::string read() {
        return text;
    }
};

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

    std::unique_ptr<Note> note = std::make_unique<Note>(text);

    std::cout << "note=" << note->read() << std::endl;
    std::cout << "owned=" << (note != nullptr) << std::endl;
    return 0;
}

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

class Note {
private:
    std::string text;

public:
    Note(std::string value) {
        text = value;
    }

    std::string read() {
        return text;
    }
};

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

    std::unique_ptr<Note> note = std::make_unique<Note>(text);

    std::cout << "note=" << note->read() << std::endl;
    std::cout << "owned=" << (note != nullptr) << std::endl;
    return 0;
}

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

class Note {
private:
    std::string text;

public:
    Note(std::string value) {
        text = value;
    }

    std::string read() {
        return text;
    }
};

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

    std::unique_ptr<Note> note = std::make_unique<Note>(text);

    std::cout << "note=" << note->read() << std::endl;
    std::cout << "owned=" << (note != nullptr) << std::endl;
    return 0;
}

unique ownership A `std::unique_ptr` deletes its object automatically when the owner goes out of scope.