[#mp_units-known_first_factor]
= xref:mp_units.adoc[mp&lowbar;units]::known&lowbar;first&lowbar;factor
:relfileprefix: ../
:mrdocs:

&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;&sol;

== Synopsis

Declared in `&lt;mp&hyphen;units&sol;framework&sol;unit&lowbar;magnitude&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
&lsqb;&lsqb;deprecated&rsqb;&rsqb;
template&lt;intmax&lowbar;t N&gt;
constexpr std::optional&lt;intmax&lowbar;t&gt; known&lowbar;first&lowbar;factor = std&colon;&colon;nullopt;
----


[.small]#Created with https://www.mrdocs.com[MrDocs]#
