[#VecDeque-operator_subs-03]
= xref:VecDeque.adoc[VecDeque]::operator[]
:relfileprefix: ../
:mrdocs:

Get a mutable reference to the element in the deque at the given index. Requires idx < size().

== Synopsis

Declared in `<util/vecdeque.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
T&
operator[](size_t idx) noexcept;
----

== Return Value

A mutable reference to the element at idx.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *idx*
| The zero‐based logical index of the element.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#