You end up needing something like refinement types to control the way you statically enforce bounds. That being said, there's stuff like https://flux-rs.github.

You end up needing something like refinement types to control the way you statically enforce bounds. That being said, there's stuff like https://flux-rs.github.io/flux/ https://flux-rs.github.io/flux/ which uses macros to layer a refinement type system on top of rust's. You can use it to statically eliminate bounds checks.