std::shared_ptr<T>::owner_hash
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< cpp | memory | shared ptr
C++
Memory management library
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std::shared_ptr
Member functions | ||||
Modifiers | ||||
Observers | ||||
(C++17)
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(until C++20*)
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shared_ptr::owner_hash (C++26) |
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(C++26)
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Non-member functions | ||||
(until C++20)
(until C++20)
(until C++20)
(until C++20)
(until C++20)
(C++20)
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functions (until C++26*)
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Helper classes | ||||
(C++20)
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Deduction guides(C++17) |
std::size_t owner_hash(
)
const
noexcept
;
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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::shared_ptr as keys in unordered associative containers
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Example
This section is incomplete Reason: example |
See also
(C++26)
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provides owner-based hashing for shared and weak pointers (class) |