[#bsl-list-054-unique-04]
= xref:bsl.adoc[bsl]::xref:bsl/list-054.adoc[list]::unique
:relfileprefix: ../../
:mrdocs:

Erase consecutive elements that compare equal under `binaryPredicate`.

== Synopsis

Declared in `<bslstl_list.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class EQ_PREDICATE>
void
unique(EQ_PREDICATE binaryPredicate);
----

== Description

Keep the first element of every consecutive group for which `binaryPredicate` returns `true` for any two consecutive elements in the group.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *binaryPredicate*
| predicate comparing consecutive elements
|===


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