Sent from my iPhone

> On Apr 5, 2017, at 1:19 AM, Víctor Pimentel <[email protected]> wrote:
> 
> 
> 
> Enviado desde mi iPhone
> El 4 abr 2017, a las 22:04, Douglas Gregor <[email protected]> escribió:
> 
>> 
>>> On Apr 4, 2017, at 12:31 PM, Víctor Pimentel Rodríguez via swift-evolution 
>>> <[email protected]> wrote:
>>> 
>>> Sorry to be late :/
>>> 
>>>> On Fri, Mar 31, 2017 at 5:29 PM, Chris Lattner via swift-evolution 
>>>> <[email protected]> wrote:
>>>> * What is your evaluation of the proposal?
>>> 
>>> More positive than the first one, but still some rough edges.
>>> 
>>> One concern that I still have is that if we use @objcMembers, @nonobjc 
>>> methods/properties are going to be even trickier to find.
>>> 
>>> If such modifier existed, I would like the compiler to warn me of public 
>>> methods/properties that cannot be bridged to ObjC, because I have 
>>> explicitly told the compiler that I want this object to live in the ObjC 
>>> runtime. Of course, with a fixit recommending something like explicitly 
>>> using @nonobjc.
>> 
>> @objc on extensions behaves this way; the compiler will produce an error if 
>> the entity cannot be exposed to Objective-C.
>> 
>>      - Doug
> 
> Yeah, I think you explained the behavior of extensions very well in the 
> proposal:
> 
> > If some member within that extension cannot be exposed to Objective-C, such 
> > as SwiftClass.bar(), the compiler will produce an error.
> 
> My specific question was about implicitly @nonobjc members in a @objcMembers 
> class. That is, would the compiler allow such member with no @nonobjc 
> annotation?

Yes. 

> And would extensions of such classes allow those members?

Yes. Also true for subclasses and their extensions. 

> Do I need to put @objc in every extension of a @objcMembers class to get that 
> compiler error?

Yes. 

> 
> By the way, I very much appreciate the level of care that you put into this 
> proposal and its implementation. Thank you very much!

I'm looking forward to getting feedback on how it works out in practice. I've 
had pretty good luck with my our migrations. 

  - Doug

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