Yep. For this reason, I wish more languages supported bound integers. Eg, rather than saying x: u32, I want to be able to use the type system to constrain x to the range of [0, 10).
This would allow for some nice properties. It would also enable a bunch of small optimisations in our languages that we can't have today. Eg, I could make an integer that must fall within my array bounds. Then I don't need to do bounds checking when I index into my array. It would also allow a lot more peephole optimisations to be made with Option.
Weirdly, rust already kinda supports this within a function thanks to LLVM magic. But it doesn't support it for variables passed between functions.
This would allow for some nice properties. It would also enable a bunch of small optimisations in our languages that we can't have today. Eg, I could make an integer that must fall within my array bounds. Then I don't need to do bounds checking when I index into my array. It would also allow a lot more peephole optimisations to be made with Option.
Weirdly, rust already kinda supports this within a function thanks to LLVM magic. But it doesn't support it for variables passed between functions.