[#beman-optional-nullopt_t]
= xref:beman.adoc[beman]::xref:beman/optional.adoc[optional]::nullopt&lowbar;t
:relfileprefix: ../../
:mrdocs:

Tag type for empty optional construction

== Synopsis

Declared in `&lt;beman&sol;optional&sol;optional&period;hpp&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct nullopt&lowbar;t;
----

== Enums

[cols="1,4"]
|===
| Name| Description
| xref:beman/optional/nullopt_t/Tag.adoc[`Tag`] 
| Tag enum for nullopt&lowbar;t construction
|===


== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:beman/optional/nullopt_t/2constructor.adoc[`nullopt&lowbar;t`]         [.small]#[constructor]#
| Construct a new nullopt&lowbar;t object
|===


== Friends

[cols="1,4"]
|===
| Name| Description
| `xref:beman/optional/operator_3way-0a.adoc[beman::optional::operator&lt;&equals;&gt;]`
| Compares two `nullopt&lowbar;t` objects&period;
| `xref:beman/optional/operator_eq-03.adoc[beman::optional::operator&equals;&equals;]`
| Compares two `nullopt&lowbar;t` objects for equality&period;
|===


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