[#bsl-enable_shared_from_this-weak_from_this-05]
= xref:bsl.adoc[bsl]::xref:bsl/enable_shared_from_this.adoc[enable_shared_from_this]::weak_from_this
:relfileprefix: ../../
:mrdocs:

Return a `weak_ptr` holding a weak reference to this managed object if this object is currently managed by `shared_ptr`, and return an expired `weak_ptr` otherwise. If multiple groups of `shared_ptr`s are managing this object, the returned `weak_ptr` will hold a weak reference to the group that first managed this object.

== Synopsis

Declared in `<bslstl_sharedptr.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/weak_ptr-0d.adoc[bsl::weak_ptr<ELEMENT_TYPE>]
weak_from_this() noexcept;
----


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