[#bsl-map-0c7-equal_range-0b]
= xref:bsl.adoc[bsl]::xref:bsl/map-0c7.adoc[map<int, pair<shared_ptr<Statistics>, shared_ptr<Collector<OsLinux>>>>]::equal_range
:relfileprefix: ../../
:mrdocs:

Return a pair of iterators providing non‐modifiable access to the sequence of `value_type` objects in this map whose keys are equivalent to 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. The first returned iterator will be `lower_bound(key)`, the second returned iterator will be `upper_bound(key)`, and, if this map contains no `value_type` objects having keys equivalent to `key`, then the two returned iterators will have the same value. Note that although a map maintains unique keys, the range may contain more than one element, because a transparent comparator may have been supplied that provides a different (but compatible) partitioning of keys for `LOOKUP_KEY` as the comparisons used to order the keys in the map.

== Synopsis

Declared in `<bslstl_map.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class LOOKUP_KEY>
xref:bsl/pair-0b.adoc[pair<const_iterator, const_iterator>]
equal_range(LOOKUP_KEY const& key) const
requires BloombergLP::bslmf::IsTransparentPredicate<COMPARATOR,
                                                   LOOKUP_KEY>::value;
----


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