[swift-evolution] Change `repeat` to loop indefinitely if no while clause is present

[Haravikk]

> On 10 May 2016, at 08:27, Nicholas Maccharoli via swift-evolution <swift-evolution at swift.org> wrote:
> 
> But I think it might be best to change the syntax / behaviour of `repeat` to loop 
> indefinitely if no trailing while clause is present:
> 
>     repeat {
>         if ... { break }
>         //...
>     }

-1 from me on both counts; the thing I like about while true is that it’s explicit about what I meant, whereas a repeat block with no while clause is indistinguishable from me forgetting to include one, or me wanting an infinite loop.

An alternative could be to add a new “forever” keyword or something similar, replacing while true wherever applicable, but personally I don’t think it’s that important.
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