[swift-evolution] /*Let it be*/ func() -> @discardable Bool {} /*Rather Than*/ @discardableResult func() -> Bool {}

[Adrian Zubarev]

async is a keyword where as @discardableResult is an attribute. This pitch does not include any advantages over the current form. In fact this will rather harm the readbility because you no longer can nicely put the annotation above the function and it won’t play well with other keywords like throws, rethrows and async.  

@discardableResult  
funx foo() { /* ... */ }

So -1 for this pitch.
--  
Adrian Zubarev
Sent with Airmail  

Am 9. Oktober 2017 um 18:02:14, Dave DeLong via swift-evolution (swift-evolution at swift.org(mailto:swift-evolution at swift.org)) schrieb:

>  
> Oooo, I really like this.  
>  
> It also brings up an interesting point on the whole async discussion. Doesn’t the async apply to the return value and not the other stuff?  
>  
> IE instead of:  
>  
> async func getBool() → Bool  
>  
> It could be:  
>  
> func getBool() → async Bool  
>  
> Dave
>  
> > On Oct 9, 2017, at 9:58 AM, Fil Ipe via swift-evolution <swift-evolution at swift.org(mailto:swift-evolution at swift.org)> wrote:  
> > I find it extremely cumbersome to have to precede a function declaration with such an extensive annotation such as @discardableResult
> >  
> > Now that so many functions do need this annotation to be there, our code became so ugly.  
> >  
> > Besides, having this annotation precede the function declaration kind of reminds me of C rather than Swift. Since in C the function declarations started by the type of the return value.  
> >  
> > I, therefore, think it would be much softer on the eye, and much more precise in intent, to instead precede the result of a func with a simpler and shorter @discardable annotation  
> >  
> > So it would be:  
> >  
> > func() -> @discardable Bool { }  
> >  
> > Rather than:  
> >  
> > @discardableResult func() -> Bool { }  
> >  
> > It could be even better if someone could perhaps find a shorter word that is a synonym for the word "discardable", that would be as explicit in intent as the word "discardable" is in such context, yet be written with fewer characters.  
> >  
> > Swift regards,  
> > Filipe Sá.
> >  
> > _______________________________________________
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> > swift-evolution at swift.org(mailto:swift-evolution at swift.org)
> > https://lists.swift.org/mailman/listinfo/swift-evolution
>  
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