Mark new functions as const

[kgv]

It allows:
const COLOR: Srgba = Srgba::new(1.0, 1.0, 1.0, 1.0);

[Ogeon]

Yep, that's a good idea! It should be possible for most, if not all of them. I don't think any of them use float arithmetic, which wasn't stable yet in const, last time I checked.

[Ogeon]

Turns out this has to wait for trait bounds other than Sized to be stabilized for const functions.