Feature request: Celsius about dimensioned HOT 5 CLOSED

The problem and challenge with handling Celsius is that you then need two Celsius types, one for temperature differences and one for absolute temperatures, and subtracting two temperatures Celsius must give a Celsius difference. Otherwise you can get nonsense results when you convert to Kelvin.

from dimensioned.

Ah i see what you mean. And i guess that would also necessitate keeping track of kelvin differences in order to convert between those. Fair enough

from dimensioned.

Perhaps adding a constant called: C0 or something similar would make sense then

let twenty_c : ucum::Kelvin<f64> = 20.0 * ucum::C0;
assert_eq!( *(twenty_c/ucum:K), 273.15);

it would have to perform an addition which would be a bit odd though…

from dimensioned.

I think a constant for 0 Celsius seems reasonable. You would be able to add it, but it would be in Kelvin at that point, so that doesn't seem too bad.

You could also create a function that inputs Kelvin and outputs a (unitless) conversion to Celsius for printing.

That is how I would handle it if I wanted to use Celsius and also use units.

from dimensioned.

I think a constant for 0 Celsius seems reasonable. You would be able to add it, but it would be in Kelvin at that point, so that doesn't seem too bad.

You could also create a function that inputs Kelvin and outputs a (unitless) conversion to Celsius for printing.

That is how I would handle it if I wanted to use Celsius and also use units.

that sounds like an extension trait. no reason that needs to exist in the crate

from dimensioned.