Subcripts returning Void

Why can't a subscript return an empty tuple

Seems to be possible for me. What version of Swift are you using?

struct Test {
  subscript() -> () {
    return ()
  }
}

let a = Test()

print(a[])

Swift 4.1 on linux

Can you try a 4.2 version? Maybe this was fixed.

Thanks

Out of curiosity, what does this allow you to express? Why do you need it?

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