[swift-evolution] Proposal: Add generator functions to the language

[Jordan Rose]

Eh, I was trying to avoid grabbing another keyword, but I guess it's context-sensitive anyway.

> On Dec 11, 2015, at 18:26 , Jonathan Hise Kaldma <info at hisekaldma.com> wrote:
> 
> Shouldn't it be:
> 
> func foo() yields -> String
> 
> Also +1 on the idea.
> 
> /Jonathan
> 
> 12 dec. 2015 kl. 03:18 skrev Jordan Rose via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>>:
> 
>> Another possible syntax, inspired by "throws".
>> 
>> func foo() yield -> String
>> 
>> I'm not sure what happens if a function both yields and throws. I guess that can't happen right now because generators are required not to throw when producing their next() value.
>> 
>> Jordan
>> 
>>> On Dec 11, 2015, at 18:14 , Jordan Rose <jordan_rose at apple.com <mailto:jordan_rose at apple.com>> wrote:
>>> 
>>> It's desireable for the signature of a function to be fully checkable without looking at the body, for a number of reasons. It's also something clients of a library will want to know, so it needs to be displayed in the library's interface somehow.
>>> 
>>> Jordan
>>> 
>>> 
>>>> On Dec 11, 2015, at 18:03 , Andrey Tarantsov via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>>>> 
>>>> Do we actually need the "generator" keyword? Why can't the compiler figure it out by the presence of yield?
>>>> 
>>>> And "yield" is a fairly standard keyword across languages, so no harm in claiming it, IMO.
>>>> 
>>>> +1 on the proposal.
>>>> 
>>>> A.
>>>> 
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>> 
>> 
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