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

This `typedef` is an alias to `std&colon;&colon;nullopt&lowbar;t`&period;

== Synopsis

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

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