[#bsl-unordered_set-09-equal_range-02]
= xref:bsl.adoc[bsl]::xref:bsl/unordered_set-09.adoc[unordered_set<Attribute, AttributeHash>]::equal_range
:relfileprefix: ../../
:mrdocs:

Return a pair of iterators providing modifiable access to the sequence of `value_type` objects in this unordered set that are equivalent to the specified `key`, where the first iterator is positioned at the start of the sequence, and the second is positioned one past the end of the sequence. If this unordered set contains no `value_type` objects equivalent to `key`, then the two returned iterators will have the same value. Note that since an unordered set maintains unique keys, the range will contain at most one element.

== Synopsis

Declared in `<bslstl_unorderedset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/pair-0b.adoc[pair<iterator, iterator>]
equal_range(xref:bsl/unordered_set-09/key_type.adoc[key_type] const& key);
----


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