[#bsl-basic_osyncstream-operator_lshift-08]
= xref:bsl.adoc[bsl]::xref:bsl/basic_osyncstream.adoc[basic_osyncstream]::operator<<
:relfileprefix: ../../
:mrdocs:

Insert characters from the specified stream buffer.

== Synopsis

Declared in `<bslstl_osyncstream.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/basic_osyncstream.adoc[Base]&
operator<<(xref:bsl/basic_osyncstream/streambuf_type.adoc[streambuf_type]* streambuf);
----

== Return Value

reference providing modifiable access to this object

== Parameters

[cols="1,4"]
|===
| Name| Description
| *streambuf*
| source stream buffer
|===


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