[#beman-optional-optional-06-2constructor-00]
= xref:beman.adoc[beman]::xref:beman/optional.adoc[optional]::xref:beman/optional/optional-06.adoc[optional<T&>]::optional
:relfileprefix: ../../../
:mrdocs:

Constructs an empty optional.

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
optional(xref:beman/optional/nullopt_t.adoc[nullopt_t] rhs) noexcept;
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *rhs*
| Tag indicating the disengaged state.
|===


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