[#bsl-unordered_set-09-reference]
= xref:bsl.adoc[bsl]::xref:bsl/unordered_set-09.adoc[unordered_set<Attribute, AttributeHash>]::reference
:relfileprefix: ../../
:mrdocs:

This `typedef` is an alias to `value_type&`.

== Synopsis

Declared in `<bslstl_unorderedset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef xref:bsl/unordered_set-09/value_type.adoc[value_type]& reference;
----


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