[#bsl-operator_eq-09d2]
= xref:bsl.adoc[bsl]::operator==
:relfileprefix: ../
:mrdocs:

Return `true` if the specified `function` is empty.

== Synopsis

Declared in `<bslstl_function.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class PROTOTYPE>
bool
operator==(
    xref:bsl/function-0a.adoc[function<PROTOTYPE>] const& f,
    xref:bsl/nullptr_t-08.adoc[nullptr_t] unused) noexcept;
----

== Return Value

`true` if `f` is empty, and `false` otherwise

== Parameters

[cols="1,4"]
|===
| Name| Description
| *f*
| function object to compare with null
| *unused*
| null pointer literal
|===


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