[#beman-optional-optional-03-transform-0d]
= xref:beman.adoc[beman]::xref:beman/optional.adoc[optional]::xref:beman/optional/optional-03.adoc[optional]::transform
:relfileprefix: ../../../
:mrdocs:

Returns an optional containing the result of applying `f` to the stored value, or a default value if there is no stored value.

== Synopsis

Declared in `<beman/optional/optional.hpp>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class F>
constexpr
auto
transform(F&& f) &&;
----

== Return Value

auto

== Template Parameters

[cols=2]
|===
| Name
| Description
| *F*
| 
|===

== Parameters

[cols=2]
|===
| Name
| Description
| *f*
| 
|===


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