[#BloombergLP-bdlcc-Deque-tryPopBack-0c1]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlcc.adoc[bdlcc]::xref:BloombergLP/bdlcc/Deque.adoc[Deque]::tryPopBack
:relfileprefix: ../../../
:mrdocs:

Remove up to `maxNumItems` from the back into `buffer`.

== Synopsis

Declared in `<bdlcc_deque.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
tryPopBack(
    xref:BloombergLP/bdlcc/Deque/size_type.adoc[size_type] maxNumItems,
    std::vector<TYPE>* buffer);
----

== Description

Remove up to the specified `maxNumItems` from the back of this container into the specified `buffer`. The removed items are appended to `buffer` as if by repeated application of `buffer‐>push_back(popBack())` while the container is not empty and `maxNumItems` have not yet been removed. Note that the ordering of the items in `*buffer` after the call is the reverse of the ordering they had in the deque. Also note that `*buffer` is not cleared ‐‐ the popped items are appended after any pre‐existing contents.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *maxNumItems*
| maximum number of items to remove
| *buffer*
| vector that receives the removed items
|===


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