[#bsl-unordered_map-02b-2constructor-0fd]
= xref:bsl.adoc[bsl]::xref:bsl/unordered_map-02b.adoc[unordered_map]::unordered_map
:relfileprefix: ../../
:mrdocs:

Create an empty unordered map with hash and allocator.

== Synopsis

Declared in `<bslstl_unorderedmap.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
unordered_map(
    xref:bsl/unordered_map-02b/size_type.adoc[size_type] initialNumBuckets,
    HASH const& hashFunction,
    ALLOCATOR const& basicAllocator);
----

== Description

Same as the preceding overload.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *initialNumBuckets*
| initial number of buckets
| *hashFunction*
| hash functor
| *basicAllocator*
| allocator used to supply memory
|===


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