[#bsl-owner_less-06-operator_call-05]
= xref:bsl.adoc[bsl]::xref:bsl/owner_less-06.adoc[owner_less<void>]::operator()
:relfileprefix: ../../
:mrdocs:

== Synopsis

Declared in `<bslstl_ownerless.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class ELEMENT_TYPE_A,
    class ELEMENT_TYPE_B>
bool
operator()(
    xref:bsl/shared_ptr-0a.adoc[shared_ptr<ELEMENT_TYPE_A>] const& a,
    xref:bsl/weak_ptr-0d.adoc[weak_ptr<ELEMENT_TYPE_B>] const& b) const noexcept;
----


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