[#bsl-shared_ptr-0a-2constructor-08c]
= xref:bsl.adoc[bsl]::xref:bsl/shared_ptr-0a.adoc[shared_ptr]::shared_ptr
:relfileprefix: ../../
:mrdocs:

Create a shared pointer that manages the same modifiable object (if any) as the specified `source` shared pointer to the (template parameter) type `ANY_TYPE`, and that refers to the modifiable object at the specified `object` address. The resulting shared pointer is known as an "alias" of `source`. Note that typically the objects referred to by `source` and `object` have identical lifetimes (e.g., one might be a part of the other), so that the deleter for `source` will destroy them both, but they do not necessarily have the same type. Also note that if `source` is empty, then an empty shared pointer is created, even if `object` is not null (in which case this empty shared pointer will refer to the same object as `object`). Also note that if `object` is null and `source` is not empty, then a reference‐counted null pointer alias will be created.

== Synopsis

Declared in `<bslstl_sharedptr.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class ANY_TYPE>
shared_ptr(
    xref:bsl/shared_ptr-0a.adoc[shared_ptr<ANY_TYPE>] const& source,
    ELEMENT_TYPE* object) noexcept;
----


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