[#BloombergLP-bdlb-swap-07]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::swap
:relfileprefix: ../../
:mrdocs:

Exchange the values of two nullable objects.

== Synopsis

Declared in `<bdlb_nullableallocatedvalue.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class TYPE>
void
swap(
    xref:BloombergLP/bdlb/NullableAllocatedValue.adoc[NullableAllocatedValue<TYPE>]& a,
    xref:BloombergLP/bdlb/NullableAllocatedValue.adoc[NullableAllocatedValue<TYPE>]& b);
----

== Description

Exchange the values of the specified `a` and `b` objects. This function provides the no‐throw exception‐safety guarantee if the two objects were created with the same allocator and the basic guarantee otherwise.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| first object to swap
| *b*
| second object to swap
|===


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