[#BloombergLP-bdld-DatumMutableMapOwningKeysRef]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdld.adoc[bdld]::DatumMutableMapOwningKeysRef
:relfileprefix: ../../
:mrdocs:

This `class` provides mutable access to a datum key‐owning map. The users of this class can assign to the individual elements, copy keys and change the size of the map.

== Synopsis

Declared in `<bdld_datum.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class DatumMutableMapOwningKeysRef;
----

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bdld/DatumMutableMapOwningKeysRef/SizeType.adoc[`SizeType`] 
| `SizeType` is an alias for an unsigned integral value, representing the capacity of a datum array, the capacity of a datum map, the capacity of the _keys‐capacity_ of a datum‐key‐owning map or the length of a string.
|===


== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:BloombergLP/bdld/DatumMutableMapOwningKeysRef/2constructor-0a.adoc[`DatumMutableMapOwningKeysRef`]         [.small]#[constructor]#
| Constructors
| xref:BloombergLP/bdld/DatumMutableMapOwningKeysRef/allocatedPtr.adoc[`allocatedPtr`] 
| Return pointer to the memory allocated for the map.
| xref:BloombergLP/bdld/DatumMutableMapOwningKeysRef/allocatedSize.adoc[`allocatedSize`] 
| Return the number of bytes allocated for the map.
| xref:BloombergLP/bdld/DatumMutableMapOwningKeysRef/data.adoc[`data`] 
| Return pointer to the first element in the held map.
| xref:BloombergLP/bdld/DatumMutableMapOwningKeysRef/keys.adoc[`keys`] 
| Return pointer to the start of the buffer where keys are stored.
| xref:BloombergLP/bdld/DatumMutableMapOwningKeysRef/size.adoc[`size`] 
| Return pointer to the location where the (held) map's size is stored.
| xref:BloombergLP/bdld/DatumMutableMapOwningKeysRef/sorted.adoc[`sorted`] 
| Return pointer to the location where the (held) map's _sorted_ flag is stored.
|===



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