[#bsl-multiset-03-2constructor-07]
= xref:bsl.adoc[bsl]::xref:bsl/multiset-03.adoc[multiset]::multiset
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:mrdocs:

Create an empty multiset&period;

== Synopsis

Declared in `&lt;bslstl&lowbar;multiset&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
multiset();
----

== Description

Optionally specify a `comparator` used to order keys contained in this object&period; If `comparator` is not supplied, a default&hyphen;constructed object of the (template parameter) type `COMPARATOR` is used&period; Optionally specify the `basicAllocator` used to supply memory&period; If `basicAllocator` is not supplied, a default&hyphen;constructed object of the (template parameter) type `ALLOCATOR` is used&period; If the type `ALLOCATOR` is `bsl&colon;&colon;allocator` (the default), then `basicAllocator`, if supplied, shall be convertible to `bslma&colon;&colon;Allocator &ast;`&period; If the type `ALLOCATOR` is `bsl&colon;&colon;allocator` and `basicAllocator` is not supplied, the currently installed default allocator is used&period;


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