Proper union types would get you there. If you have them, then each specific integer constant is basically its own type, and e.g. uint8 is just (0|1|2|...|255). So long as your type algebra has an operator that excludes one of the variants from the union to produce a new one, it's trivial to exclude whatever, and it's still easy for the compiler to reason about such types and to provide syntactic sugar for them like 0..255 etc.