On: Swift is like Kotlin

[yorwba]

> I suspect `0..=n` would work similarly well, but I've not seen a real language to ever do that yet

This could be extended to cover `0=..=n`, `0<..=n`, `0<..<n` and `0<..=n`.

You can actually define that syntax in Haskell:

    Prelude> let a =..= b = [a..b]
    Prelude> let a <..= b = [(a+1)..b]
    Prelude> let a <..< b = [(a+1)..(b-1)]
    Prelude> let a =..< b = [a..(b-1)]
    Prelude> (1 =..= 4, 1 <..= 4, 1 <..< 4, 1 =..< 4)
      ([1,2,3,4],[2,3,4],[2,3],[1,2,3])