[#PresaltedSipHasher-operator_call-0d]
= xref:PresaltedSipHasher.adoc[PresaltedSipHasher]::operator()
:relfileprefix: ../
:mrdocs:

Equivalent to CSipHasher(k0, k1)&period;Write(val)&period;Write(extra)&period;Finalize(), with `extra` encoded as 4 little&hyphen;endian bytes&period;

== Synopsis

Declared in `&lt;crypto&sol;siphash&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
uint64&lowbar;t
operator()(
    xref:uint256.adoc[uint256] const& val,
    uint32&lowbar;t extra) const noexcept;
----

== Return Value

The resulting 64&hyphen;bit hash&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *val*
| The 256&hyphen;bit value to hash&period;
| *extra*
| The extra 32&hyphen;bit word to hash after val&period;
|===


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