[#bsl-make_optional-06]
= 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,
    class t_INIT_LIST_TYPE,
    class... t_ARGS>
xref:bsl/optional-072.adoc[bsl::optional<t_TYPE>]
make_optional(
    std::allocator_arg_t allocatorArg,
    bsl::optional<t_TYPE>::allocator_type const& alloc,
    std::initializer_list<t_INIT_LIST_TYPE> il,
    t_ARGS&&... args);
----

== 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 `il` and `args` as the constructor arguments. Note that this function will fail to compile if `t_TYPE` doesn't use allocators.

== Return Value

`optional` containing a `t_TYPE` constructed from `il` and `args`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *allocatorArg*
| tag selecting the allocator‐extended constructor
| *alloc*
| allocator used to supply memory for the optional
| *il*
| initializer list forwarded to construct the contained value
| *args*
| arguments forwarded to construct the contained value
|===


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