[swift-evolution] Tuple

[Fabian Ehrentraud]

> 
> It's error by design: we don't allow tuple unpacking in closure parameters. Another example:
> 
> func call(block: ((Int, Int)) -> Int)  // note double parens
> call { (a, b) in print(a + b) }  // will be error
> call { (a) in print(a.0 + a.1) } // ok

Is there a reason for this design, or would it be possible / make sense to support this?

 F