[#bsl-function-0a-2conversion-0c]
= xref:bsl.adoc[bsl]::xref:bsl/function-0a.adoc[function]::operator xref:BloombergLP/bdef_Function.adoc[BloombergLP::bdef_Function<PROTOTYPE*>] const&
:relfileprefix: ../../
:mrdocs:

Return `*this` converted to a const `bdef_Function` reference by downcasting. The behavior is undefined unless `bdef_Function<F*>` is derived from `bsl::function<F>` and adds no new data members.

== Synopsis

Declared in `<bslstl_function.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
operator xref:BloombergLP/bdef_Function.adoc[BloombergLP::bdef_Function<PROTOTYPE*>] const&() const noexcept;
----

== Description

DEPRECATED: Use `bsl::function` instead of `bdef_Function`.


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