5 Quantities and units library [quantities]

5.4 Reference [qty.ref]

5.4.3 Quantity specification [qty.spec]

5.4.3.6 Hierarchy algorithms [qty.spec.hier.algos]

5.4.3.6.1 Conversion [qty.spec.conv]

consteval bool implicitly_convertible(QuantitySpec auto from, QuantitySpec auto to);
Returns: TBD.
consteval bool explicitly_convertible(QuantitySpec auto from, QuantitySpec auto to);
Returns: TBD.
consteval bool castable(QuantitySpec auto from, QuantitySpec auto to);
Returns: TBD.
consteval bool interconvertible(QuantitySpec auto qs1, QuantitySpec auto qs2);
Returns: implicitly_convertible(qs1, qs2) && implicitly_convertible(qs2, qs1).