[#BloombergLP-bdlar-NullableValueConstVtable-IsNull]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlar.adoc[bdlar]::xref:BloombergLP/bdlar/NullableValueConstVtable.adoc[NullableValueConstVtable]::IsNull
:relfileprefix: ../../../
:mrdocs:

Function pointer type indicating whether a nullable value is null.

== Synopsis

Declared in `<bdlar_nullablevaluevtable.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef bool IsNull(void const*);
----


[.small]#Created with https://www.mrdocs.com[MrDocs]#