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std::weak_ptr::reset(3) C++ Standard Libary std::weak_ptr::reset(3) NAME std::weak_ptr::reset - std::weak_ptr::reset Synopsis 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 <memory> #include <iostream> 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) http://cppreference.com 2022.07.31 std::weak_ptr::reset(3)
NAME | Synopsis | Parameters | Return value | Example | Output: | See also
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