[#BloombergLP-bdlat_NullableValueFunctions-IsNullableValue-03b]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlat_NullableValueFunctions.adoc[bdlat&lowbar;NullableValueFunctions]::xref:BloombergLP/bdlat_NullableValueFunctions/IsNullableValue-030.adoc[IsNullableValue]&lt;xref:BloombergLP/bdlar/NullableValueConstRef.adoc[bdlar::NullableValueConstRef]&gt;
:relfileprefix: ../../
:mrdocs:

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;&gt;
struct xref:BloombergLP/bdlat_NullableValueFunctions/IsNullableValue-030.adoc[IsNullableValue]&lt;xref:BloombergLP/bdlar/NullableValueConstRef.adoc[bdlar::NullableValueConstRef]&gt;
    : xref:bsl/true_type.adoc[bsl::true&lowbar;type]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:bsl/true_type.adoc[bsl::true&lowbar;type]`
| Metafunction representing the boolean constant `true`&period;
|===


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