[#bsl-basic_ostringstream-operator_lshift-0ff]
= xref:bsl.adoc[bsl]::xref:bsl/basic_ostringstream.adoc[basic_ostringstream]::operator<<
:relfileprefix: ../../
:mrdocs:

Insert characters from `streambuf` until end‐of‐file.

== Synopsis

Declared in `<bslstl_ostringstream.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:bsl/basic_ostringstream.adoc[BaseStream]&
operator<<(std::basic_streambuf<char_type, traits_type>* streambuf);
----

== Return Value

a reference to this stream

== Parameters

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


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