[#bsl-nullopt]
= xref:bsl.adoc[bsl]::nullopt
:relfileprefix: ../
:mrdocs:

Constant used to construct disengaged `optional` objects&period;

== Synopsis

Declared in `&lt;bslstl&lowbar;optional&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
using std::nullopt;
----


[.small]#Created with https://www.mrdocs.com[MrDocs]#
