[#absl-optional_ref-05]
= xref:absl.adoc[absl]::xref:absl/optional_ref-0c.adoc[optional_ref<T const>]
:relfileprefix: ../
:mrdocs:

Deduces `optional_ref<const T>` from a const `std::optional`.

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename T>
xref:absl/optional_ref-0c.adoc[optional_ref<T const>](std::optional<T> const&) -> xref:absl/optional_ref-0c.adoc[optional_ref<T const>];
----


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