cpp_shared_ptr - 8BitsCoding/RobotMentor GitHub Wiki

#include <memory>
#include "Vector.h"

int main() {
    std::stared_ptr<Vector> vector = std::make_shared<Vector>(10.f, 30.f);
    // ...
}

std::shared_ptr<Vector> vector = std::make_shared<Vector>(10.f, 30.f);
std::shared_ptr<Vector> copiedVector = vector;

std::shared_ptr<Vector> vector = std::make_shared<Vector>(10.f, 30.f);
std::shared_ptr<Vector> copiedVector = vector;
vector.reset(); // nullptr
// strong ref가 1개 줄어든다.

#include <memory>
#include "Vector.h"

int main() {
    std::shared_ptr<Vector> vector = std::make_shared<Vector>(10.f, 30.f);
    std::cout << "vector : " << vector.use_count() << std::endl;

    std::shared_ptr<Vector> copiedVector = vector;
    std::cout << "vector : " << vector.use_count() << std::endl;
    std::cout << "copiedVector : " << copitedVector.use_count() << std::endl;

    return 0;
}

class Person
{
public:
    void SetPet(const std::shared_ptr<Pet>& pet);
    // ...

private:
    std::shared_ptr<Pet> mPet;
};

class Pet
{
public:
    void SetOwner(const std::shared_ptr<Person>& owner);
    // ...

private:
    std::shared_ptr<Person> mOwner;
};

// main
std::shared_ptr<Person> owner = std::make_shared<Person>("Pope");
std::shared_prt<Pet> pet = std::make_shared<Pet>("Coco");

owner->SetPet(pet);
pet->SetOwner(owner);