[#BloombergLP-bdlc-FlatHashSet-equal_range-0d]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/FlatHashSet.adoc[FlatHashSet]::equal_range
:relfileprefix: ../../../
:mrdocs:

Return the equal range for the specified `key`.

== Synopsis

Declared in `<bdlc_flathashset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/pair-0b.adoc[bsl::pair<FlatHashSet<KEY, HASH, EQUAL>::const_iterator, FlatHashSet<KEY, HASH, EQUAL>::const_iterator>]
equal_range(KEY const& key) const;
----

== Description

Return a pair of `const_iterator`s defining the sequence of elements in this set having the specified `key`, where the first iterator is positioned at the start of the sequence and the second iterator is positioned one past the end of the sequence. If this set contains no `KEY` elements equivalent to `key`, then the two returned iterators will have the same value. Note that since a set maintains unique keys, the range will contain at most one element.

== Return Value

pair of const iterators delimiting the equal range

== Parameters

[cols="1,4"]
|===
| Name| Description
| *key*
| key whose equal range is returned
|===


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