[#beman-optional-nullopt_t]
= xref:beman.adoc[beman]::xref:beman/optional.adoc[optional]::nullopt_t
:relfileprefix: ../../
:mrdocs:

Tag type for empty optional construction

== Synopsis

Declared in `<beman/optional/optional.hpp>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct nullopt_t;
----

== Enums

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

== Member Functions

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

== Friends

[cols="1,4"]
|===
|Name|Description

| `xref:beman/optional/operator_3way-0a.adoc[beman::optional::operator<=>]`
| Three‐way comparison operator
| `xref:beman/optional/operator_eq-03.adoc[beman::optional::operator==]`
| Equality operator
|===


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