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

Extract one of eight 32&hyphen;bit sub&hyphen;hashes from a 256&hyphen;bit key&period;

== Synopsis

Declared in `&lt;util&sol;hasher&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;uint8&lowbar;t hash&lowbar;select&gt;
uint32&lowbar;t
operator()(xref:uint256.adoc[uint256] const& key) const;
----

== Return Value

The selected 32&hyphen;bit word of the key&period;

== Template Parameters

[cols="1,4"]
|===
| Name| Description
| *hash&lowbar;select*
| Which 32&hyphen;bit word to read, in the range 0 to 7&period;
|===

== Parameters

[cols="1,4"]
|===
| Name| Description
| *key*
| The 256&hyphen;bit key to read the sub&hyphen;hash from&period;
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#
