[#bsl-operator_3way-07cc]
= xref:bsl.adoc[bsl]::operator<=>
:relfileprefix: ../
:mrdocs:

Perform a lexicographic three‐way comparison of `lhs` and `rhs`.

== Synopsis

Declared in `<bslstl_deque.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    class VALUE_TYPE,
    class ALLOCATOR>
xref:BloombergLP/bslalg/SynthThreeWayUtil/Result.adoc[BloombergLP::bslalg::SynthThreeWayUtil::Result<VALUE_TYPE>]
operator<=>(
    xref:bsl/deque-0c.adoc[deque<VALUE_TYPE, ALLOCATOR>] const& lhs,
    xref:bsl/deque-0c.adoc[deque<VALUE_TYPE, ALLOCATOR>] const& rhs);
----

== Description

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

== Return Value

result of the three‐way comparison

== Parameters

[cols="1,4"]
|===
| Name| Description
| *lhs*
| left‐hand deque to compare
| *rhs*
| right‐hand deque to compare
|===


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