5 Quantities and units library [quantities]

5.7 Quantity point [qty.pt]

5.7.1 General [qty.pt.general]

Subclause [qty.pt] describes the class template quantity_point that represents the value of a quantity (IEC 60050, 112-01-28) that is an element of an affine space (IEC 60050, 102-03-02,102-04-01).