[#BloombergLP-bdlc-swap-061]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::swap
:relfileprefix: ../../
:mrdocs:

Exchange the value of `a` with that of `b`.

== Synopsis

Declared in `<bdlc_flathashmap.h>`

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

== Description

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 map to exchange
| *b*
| second map to exchange
|===


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