# std::weak_ptr<T>::reset

From cppreference.com
< cpp‎ | memory‎ | weak ptr

void reset() noexcept; |  | (since C++11)

Releases the reference to the managed object. After the call *this manages no object.

### Parameters

(none)

### Return value

(none)

### Example

Run this code

    #include <iostream>
    #include <memory>

    int main()
    {
        auto shared = std::make_shared<int>(), shared2 = shared, shared3 = shared2;

        auto weak = std::weak_ptr<int>{shared};

        std::cout << std::boolalpha
                  << "shared.use_count(): " << shared.use_count() << '\n'
                  << "weak.use_count(): " << weak.use_count() << '\n'
                  << "weak.expired(): " << weak.expired() << '\n';

        weak.reset();

        std::cout << "weak.reset();\n"
                  << "shared.use_count(): " << shared.use_count() << '\n'
                  << "weak.use_count(): " << weak.use_count() << '\n'
                  << "weak.expired(): " << weak.expired() << '\n';
    }

Output:

    shared.use_count(): 3
    weak.use_count(): 3
    weak.expired(): false
    weak.reset();
    shared.use_count(): 3
    weak.use_count(): 0
    weak.expired(): true

### See also

expired | checks whether the referenced object was already deleted (public member function)

Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/memory/weak_ptr/reset&oldid=153992"