[#BloombergLP-bdlc-FlatHashSet-hash_function]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/FlatHashSet.adoc[FlatHashSet]::hash&lowbar;function
:relfileprefix: ../../../
:mrdocs:

Return (a copy of) the unary hash functor used by this set to generate a hash value (of type `bsl&colon;&colon;size&lowbar;t`) for a `KEY` object&period;

== Synopsis

Declared in `&lt;bdlc&lowbar;flathashset&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
HASH
hash&lowbar;function() const;
----

== Return Value

hash functor used by this set


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