[#BloombergLP-bdlb-NullableValueRef-emplace]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::xref:BloombergLP/bdlb/NullableValueRef.adoc[NullableValueRef]::emplace
:relfileprefix: ../../../
:mrdocs:

Assign to the target the value of the (template parameter) `TYPE` created in place using the specified `args` and return a reference providing modifiable access to the underlying `TYPE` object. If this `optional` object already contains an object (`true == hasValue()`), that object is destroyed before the new object is created. Note that if the constructor of `TYPE` throws an exception this object is left in a disengaged state.

== Synopsis

Declared in `<bdlb_nullablevalueref.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class... ARGS>
TYPE&
emplace(ARGS&&... args);
----


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