[#bsl-unordered_multimap-0b0-2constructor-0f]
= xref:bsl.adoc[bsl]::xref:bsl/unordered_multimap-0b0.adoc[unordered&lowbar;multimap]::unordered&lowbar;multimap
:relfileprefix: ../../
:mrdocs:

Create an empty unordered multimap&period; Optionally specify an `initialNumBuckets` indicating the minimum initial size of the array of buckets of this container&period; If `initialNumBuckets` is not supplied, a single empty bucket is used&period; Optionally specify a `hashFunction` used to generate the hash values for the keys contained in this unordered multimap&period; If `hashFunction` is not supplied, a default&hyphen;constructed object of the (template parameter) type `HASH` is used&period; Optionally specify a key&hyphen;equivalence functor `keyEqual` used to verify that two keys are equivalent&period; If `keyEqual` is not supplied, a default&hyphen;constructed object of the (template parameter) type `EQUAL` is used&period; Optionally specify a `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;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
unordered&lowbar;multimap();
----


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