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

Meta&hyphen;function indicating whether the specified `t&lowbar;TYPE` is a nullable value type&period;

== Synopsis

Declared in `&lt;bdlar&lowbar;typecategory&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;class t&lowbar;TYPE&gt;
struct IsNullable
    : xref:BloombergLP/bdlat_NullableValueFunctions/IsNullableValue-030.adoc[BloombergLP::bdlat&lowbar;NullableValueFunctions::IsNullableValue&lt;t&lowbar;TYPE&gt;]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:BloombergLP/bdlat_NullableValueFunctions/IsNullableValue-030.adoc[BloombergLP::bdlat&lowbar;NullableValueFunctions::IsNullableValue&lt;t&lowbar;TYPE&gt;]`
| This `struct` should be specialized for third&hyphen;party types that need to expose &quot;nullable&quot; behavior&period; See the component&hyphen;level documentation for further information&period;
|===


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