[#BloombergLP-bdljsn-Json-operator_assign-0a]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdljsn.adoc[bdljsn]::xref:BloombergLP/bdljsn/Json.adoc[Json]::operator=
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:mrdocs:

Assign to this object the singleton value of type `JsonNull`, and return a reference providing modifiable access to this object. `rhs` is left in a valid but unspecified state. The value currently held by this object (if any) is destroyed if that value's type is not `JsonNull`.

== Synopsis

Declared in `<bdljsn_json.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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xref:BloombergLP/bdljsn/Json.adoc[Json]&
operator=(xref:BloombergLP/bslmf/MovableRef.adoc[bslmf::MovableRef<JsonNull>]);
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