5 Quantities and units library [quantities]

5.7 Quantity point [qty.pt]

5.7.5 Static member functions [qty.pt.static]

static constexpr quantity_point min() noexcept requires see below; static constexpr quantity_point max() noexcept requires see below;
Let F be one of min and max.
Returns: {quantity_type​::​F(), PO}.
Remarks: The expression in the requires-clause is equivalent to: requires { quantity_type::F(); }