[swift-evolution] [Proposal] function "return" optional keyword.

Jordan Rose jordan_rose at apple.com
Sat Dec 19 22:26:49 CST 2015

I'm not going to go as far as a definitive +1, but I've definitely wanted this for var and subscript getters. If it were limited to single-expression functions, I don't see much harm. The only time there'd be a problem is if the return types matched and you were going to have another statement instead.

It feels weird for anything imperative, but I think the whole point is that there are plenty of functions which do absolutely no imperative work. I personally wouldn't want people to start using it for forwarding imperative things, though.

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> On Dec 19, 2015, at 5:30 , Craig Cruden via swift-evolution <swift-evolution at swift.org> wrote:
> When writing short functional code in a function it would be nice if the return keyword were an optional keyword. 
> Just return the last evaluated expression.
> i.e.
>     func flipFunc<T, U>(arg1: T, arg2: U) -> (U, T) {
>         (arg2, arg1)
>     }
> The keyword return would still be there for breaking out of a function.
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