[#mp_units-kind_of_-0d]
= xref:mp_units.adoc[mp_units]::xref:mp_units/kind_of_-00.adoc[kind_of_]<Q>
:relfileprefix: ../
:mrdocs:

Specialization defining the quantity kind of the hierarchy tree rooted at `Q`

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<xref:mp_units/QuantitySpec.adoc[QuantitySpec] Q>
requires (!detail::QuantityKindSpec<Q>) && (detail::get_kind_tree_root(Q{}) == Q{})
struct xref:mp_units/kind_of_-00.adoc[kind_of_]<Q>
    : Q::_base_type_
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `Q::_base_type_`
| 
|===

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:mp_units/kind_of_-0d/_base_type_.adoc[`_base_type_`] 
| The base type used to detect specializations of `kind_of_`
|===


== Static Data Members

[cols="1,4"]
|===
| Name| Description
| xref:mp_units/kind_of_-0d/_is_non_negative_.adoc[`_is_non_negative_`] 
| Always `false`, as a kind can never be universally non‐negative
| xref:mp_units/kind_of_-0d/_quantity_spec_.adoc[`_quantity_spec_`] 
| The root quantity specification this kind was created from
|===


== Template Parameters

[cols="1,4"]
|===
| Name| Description
| *Q*
| the root quantity specification of the kind
|===


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