std::owner_hash - cppreference.com
From cppreference.com
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(since C++26) | |
This function object provides owner-based (as opposed to value-based) hashing of both std::weak_ptr and std::shared_ptr.
Nested types
Member functions
| calculates the hash of the shared-ownership pointer (function) |
std::owner_hash::operator()
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(1) | (since C++26) |
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(2) | (since C++26) |
Equivalent to return key.owner_hash();.
Parameters
| key | - | shared-ownership pointer to be hashed |
Return value
A hash 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::shared_ptr and std::weak_ptr as keys in unordered associative containers
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See also
| provides owner-based hashing of shared pointers (public member function of std::shared_ptr<T>) [edit]
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| provides owner-based hashing of weak pointers (public member function of std::weak_ptr<T>) [edit]
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