[#BloombergLP-bdlc-FlatHashMap-operator_subs-06]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/FlatHashMap.adoc[FlatHashMap]::operator&lsqb;&rsqb;
:relfileprefix: ../../../
:mrdocs:

Return a reference providing modifiable access to the mapped value associated with the specified `key` in this map&period; If this map does not already contain an element having `key`, insert an element with the `key` and a default&hyphen;constructed `VALUE`, and return a reference to the newly mapped value&period; If `key` is movable, `key` is left in a (valid) unspecified state&period;

== Synopsis

Declared in `&lt;bdlc&lowbar;flathashmap&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
VALUE&
operator&lsqb;&rsqb;(xref:BloombergLP/bslmf/MovableRef.adoc[bslmf::MovableRef&lt;KEY&gt;] key);
----


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