[#BloombergLP-bdld-DatumMapOwningKeysBuilder-2constructor-09]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdld.adoc[bdld]::xref:BloombergLP/bdld/DatumMapOwningKeysBuilder.adoc[DatumMapOwningKeysBuilder]::DatumMapOwningKeysBuilder
:relfileprefix: ../../../
:mrdocs:

Create a builder with the specified capacities and `allocator`.

== Synopsis

Declared in `<bdld_datummapowningkeysbuilder.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
DatumMapOwningKeysBuilder(
    xref:BloombergLP/bdld/DatumMapOwningKeysBuilder/SizeType.adoc[SizeType] initialCapacity,
    xref:BloombergLP/bdld/DatumMapOwningKeysBuilder/SizeType.adoc[SizeType] initialKeysCapacity,
    xref:BloombergLP/bdld/DatumMapOwningKeysBuilder/allocator_type.adoc[allocator_type] const& allocator);
----

== Description

Create a `DatumMapOwningKeysBuilder` object managing the ownership of `Datum` map (owning keys) having the specified `initialCapacity` and `initialKeysCapacity` (in bytes) using the specified `allocator` (e.g., the address of a `bslma::Allocator` object) to supply memory.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *initialCapacity*
| initial entry capacity of the map
| *initialKeysCapacity*
| initial key‐storage capacity in bytes
| *allocator*
| allocator used to supply memory
|===


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