[#bsl-map-0af-operator_subs-09]
= xref:bsl.adoc[bsl]::xref:bsl/map-0af.adoc[map&lt;TimeInterval, Node*&gt;]::operator&lsqb;&rsqb;
:relfileprefix: ../../
:mrdocs:

Return a reference providing modifiable access to the mapped&hyphen;value associated with the specified `key`&semi; if this `map` does not already contain a `value&lowbar;type` object having an equivalent key, first insert a new `value&lowbar;type` object having `key` and a default&hyphen;constructed `VALUE` object, and return a reference to the newly mapped (default) value&period; This method requires that the (template parameter) type `KEY` be `copy&hyphen;insertable` into this map and the (template parameter) type `VALUE` be `default&hyphen;insertable` into this map (see &lcub;Requirements on `KEY` and `VALUE`&rcub;)&period;

== Synopsis

Declared in `&lt;bslstl&lowbar;map&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/add_lvalue_reference-0c/type.adoc[add&lowbar;lvalue&lowbar;reference&lt;Node*&gt;::type]
operator&lsqb;&rsqb;(xref:bsl/map-0af/key_type.adoc[key&lowbar;type] const& key);
----


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