[#bsl-make_optional-04]
= xref:bsl.adoc[bsl]::make_optional
:relfileprefix: ../
:mrdocs:

Return an `optional` containing a value constructed from the arguments.

== Synopsis

Declared in `<bslstl_optional.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class t_TYPE>
xref:bsl/optional-072.adoc[bsl::optional<bsl::decay<t_TYPE>::type>]
make_optional(
    std::allocator_arg_t allocatorArg,
    bsl::optional<bsl::decay<t_TYPE>::type>::allocator_type const& alloc,
    t_TYPE&& rhs);
----

== Description

Return an `optional` object containing a `t_TYPE` object created by invoking a `bsl::optional` allocator‐extended `in_place_t` constructor with the specified `alloc` as the allocator argument, and specified `rhs` as the constructor argument. Note that this function will fail to compile if `t_TYPE` doesn't use allocators.

== Return Value

`optional` containing a `t_TYPE` constructed from `rhs`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *allocatorArg*
| tag selecting the allocator‐extended constructor
| *alloc*
| allocator used to supply memory for the optional
| *rhs*
| right‐hand operand
|===


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