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

Alias for `std::nullopt`, the disengaged‐optional constant.

== Synopsis

Declared in `<absl/types/optional.h>`

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