Returns a mutable reference to the underlying quantity, measured from point_origin.
Declared in <mp-units/framework/quantity_point.h>
template<PointOrigin PO2>
requires (PO2{} == point_origin)
[[nodiscard]]
constexpr
quantity_type&
quantity_ref_from(PO2 po) & noexcept;A reference to the stored offset quantity.
The return value should not be discarded.
| Name | Description |
|---|---|
| po | a point origin equal to point_origin |