[swift-evolution] Coroutine for Swift

[Susan Cheng]

with consider defer statement
we can clean up the memory if coroutine is not completed.

i have updated the proposal.

2015-12-22 15:33 GMT+08:00 Andrew Bennett <cacoyi at gmail.com>:

> Great proposal! I'm all for this, I think your proposed implementation is
> pretty good too.
>
> It would be interesting to expand the proposal to consider more cases in
> more detail:
>  * Concurrency
>  * SequenceType versus GeneratorType
>  * Should a language feature depend on the Standard Library
> (GeneratorType)? Alternatives:
>      + func myFunction -> () -> T?
>      + func myFunction -> () -> (myFunction_State, myFunction_State -> T?)
>  * What happens if you write: guard ... else { yield ... }
>  * Use an enum for the state that encapsulates all possible variables in
> each state
>
> If you're not familiar with it, there's another thread that discussed
> similar here:
>
> https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20151207/001872.html
>
> In particular you may be interested in Chris Lattner's comment:
>
> I’m very interested in this, but it is clearly out of scope for Swift 3.
> It should also be considered alongside whatever async/concurrency approach
> we tackle (likely in swift 4).
>
>
> Either way it's worth discussing and working towards :)
>
> On Tue, Dec 22, 2015 at 6:03 PM, Félix Cloutier <swift-evolution at swift.org
> > wrote:
>
>> There's probably some additional work to do on the proposal document, but
>> I would like to see coroutines in Swift too. The feature has been very
>> successful in other languages like Python and C#, and unless I'm mistaken,
>> work is being done to standardize it in C++.
>>
>> Generators are one use case, but resumable functions in general can also
>> be used to make async code look prettier.
>>
>> Félix
>>
>> Le 22 déc. 2015 à 01:47:05, Susan Cheng via swift-evolution <
>> swift-evolution at swift.org> a écrit :
>>
>> here is my proposal for swift lang
>>
>>
>> https://github.com/SusanDoggie/swift-evolution/blob/master/proposals/0018-coroutine-for-swift.md
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