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

Return true if the specified `function` argument is empty, otherwise return false&period;

== Synopsis

Declared in `&lt;bslstl&lowbar;function&period;h&gt;`

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


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