std::weak_ptr in C++

std::weak_ptr in C++ — a practical guide to C++ weak_ptr with clear examples you can reuse in real projects.

C++ Tutorial Series (98/111). Prefer one article? Read the complete C++ tutorial.

Short description

lock() to get a temporary shared_ptr safely.

weak_ptr tip

std::weak_ptr<int> w = a;
if (auto sp = w.lock()) {
    std::cout << *sp << 'n';
}