std::weak_ptr::owner_hash(3)

🌸 NAME 🌸

okay bestie, welcome to the std::weak_ptr::owner_hash(3) page — straight outta the C++ Standard Libary manual (yes, “Libary”, we’re keeping the spelling, it’s iconic ✨).

std::weak_ptr::owner_hash — literally std::weak_ptr::owner_hash. that’s the name, no notes. 💅

✨ Synopsis ✨

std::size_t owner_hash() const noexcept;  (since C++26)

It returns an unspecified value, but with a very specific rule: for any object other where owner_equal(other) is true, owner_hash() == other.owner_hash() is true. periodt. 🫶

This hashing is used to make shared and weak pointers usable as keys in unordered associative containers, typically through std::owner_hash. iykyk. 🔥

🌈 Return value 🌈

A value that’s identical for any std::shared_ptr or std::weak_ptr object sharing the same ownership. same ownership = same value, bestie. 💖

🧚 Notes 🧚

Feature-test macro check, bestie:

• Feature-test macro: __cpp_lib_smart_ptr_owner_equality
• Value: 202306L
• Std: (C++26)
• Feature: Enabling the use of std::weak_ptr as keys in unordered associative containers

🦋 Example 🦋

This section is incomplete. Reason: example 🙈

👑 See also 👑

owner_hash provides owner-based hashing for shared and weak pointers (C++26) (class). 💜

🏷️ Category: 🏷️

• Category: * Todo with reason

okay that’s the whole page, bestie 🎀 — source/version: http://cppreference.com; date: 2024.06.10. mwah! 💖