[#mp_units-quantity-09]
= xref:mp_units.adoc[mp_units]::xref:mp_units/quantity-01.adoc[quantity<R, representation_canonical_type_t<Value>>]
:relfileprefix: ../
:mrdocs:

== Synopsis

Declared in `<mp‐units/framework/quantity.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    xref:mp_units/Reference.adoc[Reference] auto R = one,
    typename Value>
requires RepresentationOf<representation_canonical_type_t<Value>, get_quantity_spec(R)>
xref:mp_units/quantity-01.adoc[quantity<R, representation_canonical_type_t<Value>>](Value) -> xref:mp_units/quantity-01.adoc[quantity<R, representation_canonical_type_t<Value>>];
----


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