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

Swap the value of the specified `a` object with the value of the specified `b` object. This method provides the no‐throw exception‐safety guarantee if either `a.type()` is the same as `b.type()` and `a` and `b` were created with the same allocator, or neither `a.type()` nor `b.type()` is a type that requires allocation; otherwise, it provides the basic guarantee.

== Synopsis

Declared in `<ball_userfieldvalue.h>`

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


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