[#BloombergLP-bslalg-operator_3way-0a1]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslalg.adoc[bslalg]::operator<=>
:relfileprefix: ../../
:mrdocs:

Return the result of comparing the block pointers of the specified `lhs` and `rhs` iterators.

== Synopsis

Declared in `<bslalg_dequeiterator.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
auto
operator<=>(
    xref:BloombergLP/bslalg/DequeIterator-01.adoc[DequeIterator] const& lhs,
    xref:BloombergLP/bslalg/DequeIterator-01.adoc[DequeIterator] const& rhs);
----

[NOTE]
====
This function is a https://en.cppreference.com/w/cpp/language/friend[hidden friend] of xref:BloombergLP/bslalg/DequeIterator-01.adoc[DequeIterator<VALUE_TYPE, 1>], declared only inside that class: it can be found only through argument-dependent lookup.
====

== Return Value

the three‐way comparison result of the two iterators

== Parameters

[cols="1,4"]
|===
| Name| Description
| *lhs*
| first iterator to compare
| *rhs*
| second iterator to compare
|===


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