[#BloombergLP-bdlbb-swap-04]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlbb.adoc[bdlbb]::swap
:relfileprefix: ../../
:mrdocs:

Efficiently exchange the values of the specified `a` and `b` objects.

== Synopsis

Declared in `<bdlbb_blob.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
swap(
    xref:BloombergLP/bdlbb/Blob.adoc[Blob]& a,
    xref:BloombergLP/bdlbb/Blob.adoc[Blob]& b);
----

== Description

This method provides the no‐throw exception‐safety guarantee if both objects were created with the same allocator.

== Parameters

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


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