std::enable_shared_from_this::weak_from_this

std::enable_shared_from_this::weak_from_this

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

Returns a std::weak_ptr<T> that tracks ownership of *this by all existing std::shared_ptr that refer to *this.

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