[#std-hash-000-operator_call]
= xref:std.adoc[std]::xref:std/hash-000.adoc[hash&lt;folly::IPAddressV4&gt;]::operator()
:relfileprefix: ../../
:mrdocs:

Returns a hash of the given address&period;

== Synopsis

Declared in `&lt;folly&sol;IPAddressV4&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
size&lowbar;t
operator()(xref:folly/IPAddressV4.adoc[folly::IPAddressV4] const addr) const;
----

== Return Value

a hash of `addr`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *addr*
| the address to hash
|===


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