[#BloombergLP-bslma-ManagedPtr-0fa-2constructor-0524]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslma.adoc[bslma]::xref:BloombergLP/bslma/ManagedPtr-0fa.adoc[ManagedPtr]::ManagedPtr
:relfileprefix: ../../../
:mrdocs:

Create an aliasing managed pointer from `alias` targeting `ptr`.

== Synopsis

Declared in `<bslma_managedptr.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class ALIASED_TYPE>
ManagedPtr(
    xref:BloombergLP/bslma/ManagedPtr-0fa.adoc[ManagedPtr<ALIASED_TYPE>]& alias,
    TARGET_TYPE* ptr);
----

== Description

Create a managed pointer that takes ownership of the object managed by the specified `alias`, but which uses the specified `ptr` to refer to its target object, unless `0 == ptr`, in which case create an empty managed pointer. Reset `alias` to empty if ownership of its managed object is transferred. The behavior is undefined if `alias` is empty, but `0 != ptr`. Note that destroying or re‐assigning a managed pointer created with this constructor will destroy the object originally managed by `alias` (unless `release` is called first); the destructor for `*ptr` is not called directly.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *alias*
| managed pointer supplying ownership of the managed object
| *ptr*
| pointer used as the target of this managed pointer, or null
|===


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