[#mp_units-Reference-0ba]
= xref:mp_units.adoc[mp&lowbar;units]::Reference
:relfileprefix: ../
:mrdocs:

A concept matching all references in the library&period;

== Synopsis

Declared in `&lt;mp&hyphen;units&sol;framework&sol;reference&lowbar;concepts&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template&lt;typename T&gt;
concept Reference = Unit&lt;T&gt; &verbar;&verbar; is&lowbar;specialization&lowbar;of&lt;T, reference&gt;;
----

== Description

Satisfied by all specializations of `reference&period;`


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