[#bsl-owner_less-06-operator_call-0e]
= xref:bsl.adoc[bsl]::xref:bsl/owner_less-06.adoc[owner_less<void>]::operator()
:relfileprefix: ../../
:mrdocs:

Return `true` if the ownership of `a` is ordered before that of `b`.

== 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/weak_ptr-0d.adoc[weak_ptr<ELEMENT_TYPE_A>] const& a,
    xref:bsl/weak_ptr-0d.adoc[weak_ptr<ELEMENT_TYPE_B>] const& b) const noexcept;
----

== Description

Return `true` if the address of the `BloombergLP::bslma::SharedPtrRep` object used by the specified `a` is ordered before the address of the `BloombergLP::bslma::SharedPtrRep` object used by the specified `b` under the total ordering supplied by `std::less<BloombergLP::bslma::SharedPtrRep *>`, and `false` otherwise.

== Return Value

`true` if the ownership of `a` is ordered before that of `b`, otherwise `false`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| first smart pointer to compare by ownership
| *b*
| second smart pointer to compare by ownership
|===


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