[#bsl-multiset-03-2constructor-0b5]
= xref:bsl.adoc[bsl]::xref:bsl/multiset-03.adoc[multiset]::multiset
:relfileprefix: ../../
:mrdocs:

Create an empty multiset that uses the specified `basicAllocator` to supply memory&period; Use a default&hyphen;constructed object of the (template parameter) type `COMPARATOR` to order the keys contained in this multiset&period; Note that a `bslma&colon;&colon;Allocator &ast;` can be supplied for `basicAllocator` if the (template parameter) `ALLOCATOR` is `bsl&colon;&colon;allocator` (the default)&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
multiset(ALLOCATOR const& basicAllocator);
----


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