shared_ptr_leak.cpp

#include <iostream>
#include <memory>

class B;

class A {
public:
    A() : m_b(nullptr){}

    void setB(std::shared_ptr<B> b) {
        m_b = b;
    }
private:
    std::shared_ptr<B> m_b;
};

class B {
public:
    B() : m_a(nullptr){}

    void setA(std::shared_ptr<A> a) {
        m_a = a;
    }
private:
    std::shared_ptr<A> m_a;
};


int main(int argc, char* argv[]) {
    std::shared_ptr<A> a = std::make_shared<A>();
    std::shared_ptr<B> b = std::make_shared<B>();
    a->setB(b);
    b->setA(a);
    return EXIT_SUCCESS;
}