mp_units::quantity_point::quantity_from

template<PointOrigin PO2>
requires requires(const quantity_point qp) { qp ‐ PO2{}; }
[[nodiscard]]
constexpr
Quantity auto
quantity_from(PO2) const;

template<QuantityPointOf<absolute_point_origin> QP>
[[nodiscard]]
constexpr
Quantity auto
quantity_from(QP const& qp) const;