Comment by lynndotpy
4 months ago
What I mean is, I want to be able to use i32/i64/u32/u64/f32/f64s interchangeably, including (and especially!) in libraries I don't own.
I'm usually working with positive values, and almost always with values within the range of integers f32 can safely represent (+- 16777216.0).
I want to be able to write `draw(x, y)` instead of `draw(x as u32, y as u32)`. I want to write "3" instead of "3.0". I want to stop writing "as".
It sounds silly, but it's enough to kill that gamedev flow loop. I'd love if the Rust compiler could (optionally) do that work for me.
Sounds like a good use of Num
[1] https://docs.rs/num-traits/latest/num_traits/trait.Num.html
Please correct me if I'm wrong, but I don't think this would let me, say, pass an i32 returned from one method directly as an f64 argument in another method.
No, it would not. Even conversions using "as" are discouraged in favor of conversion traits such as From and TryFrom. Rust's goals of being explicit and correct are at odds with people wanting things to be immediately simple and easy to use.