Public helper that yields the reference (unit + quantity spec) associated with a quantity-like type.
<mp-units/framework/quantity_traits.h>template<typename T>
constexpr auto reference_for = detail::reference_for_impl<T>::value;Derived from the type's own ::reference member (for quantity / quantity_point) or from quantity_like_traits<T> / quantity_point_like_traits<T> 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.
| Name | Description |
|---|---|
| T | a quantity-like or quantity-point-like type |