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std::enable_shared_from_this<T>::weak_from_this

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

Contents

[edit] Return value

std::weak_ptr<T> that shares ownership of *this with pre-existing std::shared_ptrs.

[edit] Notes

weak_from_this copies the exposition only weak_ptr member that is part of enable_shared_from_this.

Feature-test macro Value Std Feature
__cpp_lib_enable_shared_from_this 201603L (C++17) std::enable_shared_from_this::weak_from_this

[edit] Example

[edit] See also

smart pointer with shared object ownership semantics
(class template) [edit]