std::shared_ptr<T>::owner_hash

 

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std::shared_ptr

成员函数

shared_ptr::shared_ptr

shared_ptr::~shared_ptr

shared_ptr::operator=

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shared_ptr::reset

shared_ptr::swap

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shared_ptr::get

shared_ptr::operator*shared_ptr::operator->

shared_ptr::operator[] (C++17)

shared_ptr::use_count

shared_ptr::unique (C++20 前*)

shared_ptr::operator bool

shared_ptr::owner_before

shared_ptr::owner_hash (C++26)

shared_ptr::owner_equal (C++26)

非成员函数

swap(std::shared_ptr)

make_sharedmake_shared_for_overwrite (C++20)

allocate_sharedallocate_shared_for_overwrite (C++20)

static_pointer_castdynamic_pointer_castconst_pointer_castreinterpret_pointer_cast (C++17)

get_deleter

operator==operator!=operator<operator<=operator>operator>=operator<=> (C++20 前)(C++20 前)(C++20 前)(C++20 前)(C++20 前)(C++20)

operator<<

atomic_xxx 函数 (C++26 前*)

辅助类

atomic<std::shared_ptr> (C++20)

hash<std::shared_ptr>

推导指引(C++17)

 

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

返回未指定的值，使得对于任何 owner_equal(other) 为 true 的对象 other，owner_hash() == other.owner_hash() 均为 true。

此散列函数常通过 std::owner_hash 使用，使得共享指针与弱指针能用作无序关联容器的键。

返回值

对于任何共享同一所有权的 std::shared_ptr 或 std::weak_ptr 对象相等的值。

注解

功能特性测试宏	值	标准	功能特性
__cpp_lib_smart_ptr_owner_equality	202306L	(C++26)	启用以 std::shared_ptr 为无序关联容器中的键

参阅

owner_hash (C++26)

对共享指针与弱指针提供基于所有者的散列器 (类)