[#bsl-weak_ptr-07]
= xref:bsl.adoc[bsl]::xref:bsl/weak_ptr-0d.adoc[weak_ptr<ELEMENT_TYPE>]
:relfileprefix: ../
:mrdocs:

Deduce the specified type `ELEMENT_TYPE` corresponding template parameter of the `bsl::shared_ptr` supplied to the constructor of `weak_ptr`.

== Synopsis

Declared in `<bslstl_sharedptr.h>`

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


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