[#mp_units-utility-operator_lshift]
= xref:mp_units.adoc[mp&lowbar;units]::xref:mp_units/utility.adoc[utility]::operator&lt;&lt;
:relfileprefix: ../../
:mrdocs:

Streams a safe&lowbar;int&apos;s wrapped value to an output stream

== Synopsis

Declared in `&lt;mp&hyphen;units&sol;utility&sol;safe&lowbar;int&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::basic&lowbar;ostream&lt;CharT, Traits&gt;&
operator&lt;&lt;(
    std::basic&lowbar;ostream&lt;CharT, Traits&gt;& os,
    xref:mp_units/utility/safe_int-07.adoc[safe&lowbar;int] v);
----

== Return Value

a reference to `os`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *os*
| the output stream to write to
| *v*
| the safe&lowbar;int to stream
|===


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