All quantity_points do have an "epoch". However, to simplify the interfaces we allowed the epochs to be implicit in some cases.

More info here:
- https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2024/p3045r1.html#zeroth_point_originquantityspec
- https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2024/p3045r1.html#temperature-support

wt., 18 cze 2024 o 17:16 Ville Voutilainen <ville.voutilainen@gmail.com> napisał(a):
On Tue, 18 Jun 2024 at 18:09, Mateusz Pusz <mateusz.pusz@gmail.com> wrote:
>
> Actually, the opposite ;-) (which is consistent with chrono).
>
> More info here: https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2024/p3045r1.html#operations-in-the-affine-space.

Ah, yes, chrono types have an epoch. These types.. ..don't. But maybe
temperatures could/should.