[#bsl-function-0a-2constructor-02]
= xref:bsl.adoc[bsl]::xref:bsl/function-0a.adoc[function]::function
:relfileprefix: ../../
:mrdocs:

Create an empty `function` object using the specified `allocator`.

== Synopsis

Declared in `<bslstl_function.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
function(
    std::allocator_arg_t allocatorArg,
    xref:bsl/function-0a/allocator_type.adoc[allocator_type] const& allocator,
    xref:bsl/nullptr_t-08.adoc[nullptr_t] unused) noexcept;
----

== Description

Create an empty `function` object. Optionally specify an `allocator` (e.g., the address of a `bslma::Allocator` object) to supply memory; otherwise, the default allocator is used.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *allocatorArg*
| allocator‐argument tag (unused)
| *allocator*
| allocator used to supply memory
| *unused*
| null pointer literal selecting the empty state
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#