[#BloombergLP-balxml-operator_lshift-0da]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/balxml.adoc[balxml]::operator<<
:relfileprefix: ../../
:mrdocs:

Print the contents of the specified `r` registry to the specified `os` stream in human‐readable form and return a modifiable reference to `os`.

== Synopsis

Declared in `<balxml_namespaceregistry.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::ostream&
operator<<(
    std::ostream& os,
    xref:BloombergLP/balxml/NamespaceRegistry.adoc[NamespaceRegistry] const& r);
----


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