[#mp_units-get_quantity_spec-03]
= xref:mp_units.adoc[mp_units]::get_quantity_spec
:relfileprefix: ../
:mrdocs:

`get_quantity_spec` overloads

== Synopses

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

Returns the quantity specification of a reference


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[nodiscard]]
consteval
xref:mp_units/QuantitySpec.adoc[QuantitySpec] auto
xref:mp_units/get_quantity_spec-0f.adoc[get_quantity_spec](xref:mp_units/reference-0b2.adoc[reference] r);
----

[.small]#xref:mp_units/get_quantity_spec-0f.adoc[_» more..._]#

Returns the quantity specification of a reference whose `Q` is marked `final`


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated("2.6.0: `Q` definition should not be marked `final`"), nodiscard]]
consteval
xref:mp_units/QuantitySpec.adoc[QuantitySpec] auto
xref:mp_units/get_quantity_spec-00.adoc[get_quantity_spec](xref:mp_units/reference-0b2.adoc[reference] r)
requires std::is_final_v<Q>;
----

[.small]#xref:mp_units/get_quantity_spec-00.adoc[_» more..._]#

== Return Value

the quantity specification `Q`

[NOTE]
====
The return value https://en.cppreference.com/cpp/language/attributes/nodiscard[should not be discarded^].
====
== Parameters

[cols="1,4"]
|===
| Name| Description
| *r*
| the reference to query
|===


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