[#BloombergLP-bdld-DatumMapOwningKeysBuilder-keysCapacity]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdld.adoc[bdld]::xref:BloombergLP/bdld/DatumMapOwningKeysBuilder.adoc[DatumMapOwningKeysBuilder]::keysCapacity
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:mrdocs:

Return the keys‐capacity of the held `Datum` map (owning keys). The behavior is undefined if `commit` or `sortAndCommit` has already been called on this object. Note that similar to the capacity of a `vector`, the returned capacity has no bearing on the value of the `Datum` being constructed, but does indicate at which point additional memory will be required to grow the `Datum` map being built.

== Synopsis

Declared in `<bdld_datummapowningkeysbuilder.h>`

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