> On Mar 2, 2017, at 3:24 AM, Anton Zhilin via swift-evolution
> <swift-evolution@swift.org> wrote:
>
> I think that tuples should remain what they are now. Static-length vectors
> should be types on their own and interact with tuples, with structs and with
> Array<…> in the same way.
>
> newtype should be what enables extension of tuples:
>
>
Does newtype add any new capability that’s not already covered by defining a
struct?
Slava
> newtype Money = (Int, Int)
>
> extension Money: CustomStringConvertible {
> var description: String {
> return String(format: "$%d.%02d", arguments: [getSelfFirst,
> getSelfSecond])
> }
> }
>
> let x = (0, 42)
> let y = x as Money // error
> print(x.description) // error
>
> let z = Money(0, 42)
> print(z.description) //=> $0.42
> Here, getSelfFirst and getSelfSecond are placeholders for some syntax to
> access the underlying type.
>
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