[#BloombergLP-bslstl-swap-0a]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslstl.adoc[bslstl]::swap
:relfileprefix: ../../
:mrdocs:

Efficiently exchange the values of the specified `a` and `b` objects. This function provides the no‐throw exception‐safety guarantee.

== Synopsis

Declared in `<bslstl_setcomparator.h>`

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


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