[swift-evolution] repeat loop enhancement

Stephen Celis stephen.celis at gmail.com
Wed Dec 9 09:02:20 CST 2015

On Wed, Dec 9, 2015 at 9:41 AM, Jason Pollack via swift-evolution <
swift-evolution at swift.org> wrote:

> Solutions like this look reasonable, until you try to use normal control
> flow statements as you would in other loops. In the closure, a break or
> continue are illegal, and a return acts like a continue.
> var ok = true
> 5.times {
>     ok = someTest()
>     if (!ok) {
>         //break - Nope!
>         return //Sure, but loop continues anyway
>     }
> }
> Sure, it's a contrived example, but it's easy to see how this construct is
> not like other loops.
> On the other hand, it might be nice to be able to decorate a closure such
> that break and continue behave as one might expect inside a loop, but that
> sounds like a can of worms.
Joe Groff suggested that here:


If you can think of reasons why it might be a can of worms, I'd love to
hear them. It'd be a nice tool to have in the toolchain.

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