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

Public alias that yields the representation type of a quantity‐like type.

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<typename T>
using rep_for = /* implementation-defined */::type;
----

== Description

Derived from the type's own `::rep` member (for `quantity` / `quantity_point`) or from `quantity_like_traits<T>::rep` / `quantity_point_like_traits<T>::rep` for external types.

This is *not* a customization point. Users teach the library about external types by specializing `quantity_like_traits` / `quantity_point_like_traits`, not this helper.

== Template Parameters

[cols="1,4"]
|===
| Name| Description
| *T*
| a quantity‐like or quantity‐point‐like type
|===


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