std::enable_shared_from_this<T>::weak_from_this

 

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std::enable_shared_from_this

受保护成员函数

enable_shared_from_this::enable_shared_from_this

enable_shared_from_this::~enable_shared_from_this

enable_shared_from_this::operator=

公开成员函数

enable_shared_from_this::shared_from_this

enable_shared_from_this::weak_from_this (C++17)

 

std::weak_ptr<T> weak_from_this() noexcept;	(1)	(C++17 起)
std::weak_ptr<T const> weak_from_this() const noexcept;	(2)	(C++17 起)

返回 std::weak_ptr<T> ，跟踪所有既存的指代 *this 的 std::shared_ptr 所拥有的 *this 的所有权。

返回值

与既存的 std::shared_ptr 共享 *this 所有权的 std::weak_ptr<T> 。

注解

weak_from_this 复制作为 enable_shared_from_this 一部分的仅用于阐释的 weak_ptr 成员。

功能特性测试宏	值	标准	备注
__cpp_lib_enable_shared_from_this	201603L	(C++17)	std::enable_shared_from_this::weak_from_this

参阅

shared_ptr (C++11)

拥有共享对象所有权语义的智能指针 (类模板)