[#BloombergLP-bslx-operator_lshift-09]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bslx.adoc[bslx]::operator<<
:relfileprefix: ../../
:mrdocs:

Write a BDEX‐compliant `value` to the specified test output `stream`.

== Synopsis

Declared in `<bslx_testoutstream.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class TYPE>
xref:BloombergLP/bslx/TestOutStream.adoc[TestOutStream]&
operator<<(
    xref:BloombergLP/bslx/TestOutStream.adoc[TestOutStream]& stream,
    TYPE const& value);
----

== Description

Write the specified `value` to the specified output `stream` following the requirements of the BDEX protocol (see the `bslx` package‐level documentation), and return a reference to `stream`. The behavior is undefined unless `TYPE` is BDEX‐compliant.

== Return Value

a reference to `stream`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *stream*
| test output stream to write to
| *value*
| BDEX‐compliant value to externalize
|===


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