[#BloombergLP-bdlb-operator_eq-06c]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlb.adoc[bdlb]::operator&equals;&equals;
:relfileprefix: ../../
:mrdocs:

Return whether `rhs` is null&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;class TYPE&gt;
bool
operator&equals;&equals;(
    xref:bsl/nullopt_t.adoc[bsl::nullopt&lowbar;t] const& lhs,
    xref:BloombergLP/bdlb/ConstNullableValueRef.adoc[ConstNullableValueRef&lt;TYPE&gt;] const& rhs) noexcept;
----

== Description

Return `true` if the specified `rhs` is null, and `false` otherwise&period;

== Return Value

`true` if the specified `rhs` is null, and `false` otherwise

== Parameters

[cols="1,4"]
|===
| Name| Description
| *lhs*
| nullopt sentinel
| *rhs*
| nullable reference to test
|===


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