[#SpanWriter-operator_lshift]
= xref:SpanWriter.adoc[SpanWriter]::operator<<
:relfileprefix: ../
:mrdocs:

Serialize an object into the span and return this writer.

== Synopsis

Declared in `<streams.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename T>
xref:SpanWriter.adoc[SpanWriter]&
operator<<(T const& obj);
----

== Return Value

A reference to this writer.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *obj*
| Object to serialize into the span.
|===


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