[#BloombergLP-bdld-operator_lshift-034]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdld.adoc[bdld]::operator<<
:relfileprefix: ../../
:mrdocs:

Write the specified `rhs` value to the specified output `stream` in the format shown below: ` [aa,bb,cc]‐ aa, bb and cc are the result of invoking operator `<<` on the individual elements in the array ` and return a reference to the modifiable `stream`. The function will have no effect if the `stream` is not valid.

== Synopsis

Declared in `<bdld_datum.h>`

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


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