std::weak_ptr<T>::owner_hash - cppreference.com
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(since C++26) | |
Returns an unspecified value such that for any object other where owner_equal(other) is true, owner_hash() == other.owner_hash() is true.
This hashing is used to make shared and weak pointers usable as keys in unordered associative containers, typically through std::owner_hash.
Return value
A value that is identical for any std::shared_ptr or std::weak_ptr object sharing the same ownership.
Notes
| Feature-test macro | Value | Std | Feature |
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__cpp_lib_smart_ptr_owner_equality |
202306L |
(C++26) | Enabling the use of std::weak_ptr as keys in unordered associative containers
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Example
See also
| provides owner-based hashing for shared and weak pointers (class) [edit] |