[#bsl-operator_3way-0ff]
= xref:bsl.adoc[bsl]::operator<=>
:relfileprefix: ../
:mrdocs:

Perform a lexicographic three‐way comparison of the specified `lhs` and the specified `rhs` multisets by using the comparison operators of `KEY` on each element; return the result of that comparison.

== Synopsis

Declared in `<bslstl_multiset.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class KEY,
    class COMPARATOR,
    class ALLOCATOR>
xref:BloombergLP/bslalg/SynthThreeWayUtil/Result.adoc[BloombergLP::bslalg::SynthThreeWayUtil::Result<KEY>]
operator<=>(
    xref:bsl/multiset-03.adoc[multiset<KEY, COMPARATOR, ALLOCATOR>] const& lhs,
    xref:bsl/multiset-03.adoc[multiset<KEY, COMPARATOR, ALLOCATOR>] const& rhs);
----


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