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

Alias for `std&colon;&colon;nullopt`, the disengaged&hyphen;optional constant&period;

== Synopsis

Declared in `&lt;absl&sol;types&sol;optional&period;h&gt;`

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