[#std-hash-0c3]
= xref:std.adoc[std]::hash&lt;xref:folly/not_null-07.adoc[folly::not&lowbar;null&lt;PtrT, NullHandlerT&gt;]&gt;
:relfileprefix: ../
:mrdocs:

Hashing&colon; &hyphen; Forwards to underlying PtrT&period;

== Synopsis

Declared in `&lt;folly&sol;memory&sol;not&lowbar;null&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;
    typename PtrT,
    typename NullHandlerT&gt;
struct hash&lt;xref:folly/not_null-07.adoc[folly::not&lowbar;null&lt;PtrT, NullHandlerT&gt;]&gt;
    : hash&lt;PtrT&gt;
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `hash&lt;PtrT&gt;`
| 
|===


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