[#nlohmann-basic_json-0c-2constructor-09]
= xref:nlohmann.adoc[nlohmann]::xref:nlohmann/basic_json-0c.adoc[basic_json]::basic_json
:relfileprefix: ../../
:mrdocs:

create a null object

== Synopsis

Declared in `<nlohmann/json.hpp>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
basic_json(std::nullptr_t null_ = nullptr) noexcept;
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *null_*
| pointer used to select this overload; the value is otherwise not used
|===


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