[#BloombergLP-bdlc-FlatHashMap-hash_function]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/FlatHashMap.adoc[FlatHashMap]::hash_function
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:mrdocs:

Return (a copy of) the unary hash functor used by this map to generate a hash value (of type `bsl::size_t`) for a `KEY` object.

== Synopsis

Declared in `<bdlc_flathashmap.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
HASH
hash_function() const;
----


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