[#BloombergLP-bdld-operator_lshift-0c0]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdld.adoc[bdld]::operator&lt;&lt;
:relfileprefix: ../../
:mrdocs:

Write the specified int&hyphen;map reference to the specified output stream&period;

== Synopsis

Declared in `&lt;bdld&lowbar;datum&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::ostream&
operator&lt;&lt;(
    std::ostream& stream,
    xref:BloombergLP/bdld/DatumIntMapRef.adoc[DatumIntMapRef] const& rhs);
----

== Description

Write the specified `rhs` value to the specified output `stream` in the format shown below&colon; &grave; &lsqb; nnn &equals; aa, mmm &equals; bb&rsqb;&hyphen; nnn and mmm are key ints, while aa and bb are the result of invoking operator `&lt;&lt;` on the individual value elements in the map &grave; and return a reference to the modifiable `stream`&period; The function will have no effect if the `stream` is not valid&period;

== Return Value

a reference to `stream`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *stream*
| output stream
| *rhs*
| value to write
|===


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