[swift-evolution] Proposal: Always flatten the single element tuple

[Adrian Zubarev]

Keep in mind there is also SE–0111 cometary which promises sugar for parameter labels for closures:

// **
let foo(tuple:): ((Int, Int)) -> Void

// Sugar for **
let foo: (tuple: (Int, Int)) -> Void
What will happen if you’d always flatten here?



-- 
Adrian Zubarev
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Am 7. Juni 2017 um 12:03:08, Adrian Zubarev (adrian.zubarev at devandartist.com) schrieb:

Well please no:


let fn2: ((Int, Int)) -> Void = { lhs, rhs in }

Instead use destructuring sugar pitched by Chris Lattner on the other thread:

let fn2: ((Int, Int)) -> Void = { ((lhs, rhs)) in }

That’s a correct error:

let fn3: (Int, Int) -> Void = { _ in }
This should be allowed, because we might want to work with the whole tuple and not a desctructured elements only:

let fn4: ((Int, Int)) -> Void = { tuple in }


-- 
Adrian Zubarev
Sent with Airmail
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