[#BloombergLP-bslh-Hash-02-operator_call]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslh.adoc[bslh]::xref:BloombergLP/bslh/Hash-07.adoc[Hash<>]::operator()
:relfileprefix: ../../../
:mrdocs:

Return a hash value for the specified `key`.

== Synopsis

Declared in `<bslh_hash.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class TYPE>
xref:BloombergLP/bslh/Hash-07.adoc[bslh::Hash<bslh::DefaultHashAlgorithm>::result_type]
operator()(TYPE const& key) const;
----

== Description

Returns a hash value generated by `bslh::DefaultHashAlgorithm` for the specified `key`. The value returned by the algorithm is cast to `size_t` before returning.

== Return Value

hash of `key`, cast to `size_t`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *key*
| object to hash
|===


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