[#BloombergLP-bdlb-ConstNullableValueRef-2constructor-0e]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::xref:BloombergLP/bdlb/ConstNullableValueRef.adoc[ConstNullableValueRef]::ConstNullableValueRef
:relfileprefix: ../../../
:mrdocs:

Create a nullable object wrapper that refers to the target object of the specified `original` wrapper&period; Note that the created wrapper does not own a copy of the underlying nullable value, but instead refers to it, and so the lifetime of the target must exceed the lifetime of the created wrapper&period;

== Synopsis

Declared in `&lt;bdlb&lowbar;nullablevalueref&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
ConstNullableValueRef(xref:BloombergLP/bdlb/ConstNullableValueRef.adoc[ConstNullableValueRef] const& original);
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