Very helpful, thank you. -- Rick Mann rm...@latencyzero.com
> On Sep 13, 2017, at 21:24, Hooman Mehr <hoo...@mac.com> wrote: > > Documentation is behind the actual state. > > What you see is the result of this change: SE-0160 Limiting @objc inference > >> On Sep 13, 2017, at 5:18 PM, Roderick Mann <rm...@latencyzero.com> wrote: >> >> Ah. That's the difference. Okay. >> >> Nevertheless, the Apple docs on the matter are unclear at best >> (https://developer.apple.com/library/content/documentation/Swift/Conceptual/BuildingCocoaApps/InteractingWithObjective-CAPIs.html): >> >> "Declarations marked with the dynamic modifier must also be explicitly >> marked with the @objc attribute unless the @objc attribute is implicitly >> added by the declaration’s context. For information about when the >> @objcattribute is implicitly added, see Declaration Attributes in The Swift >> Programming Language (Swift 4)." >> >> The referenced doc has a lot of stuff, so it's hard to zero in on the >> discussion of implicit-objc, but there's this: >> >> "The compiler implicitly adds the objc attribute to subclasses of any class >> defined in Objective-C." >> >> To me, this means that my NSObject-derived class is implicitly @objc, and so >> the members within it (the declaration context) shouldn't need @objc as well. >> >> To help me understand better, can you have dynamic without an implicit or >> explicit @objc? It seems not, and if not, why isn't it enough for dynamic to >> then just imply @objc to the compiler? >> >> Thanks, >> Rick >> >> >> >> >> >>> On Sep 13, 2017, at 17:06 , Hooman Mehr <hoo...@mac.com> wrote: >>> >>> When you create a new project in Xcode 9, the defaults for compiler >>> settings are different. The errors you see are the result of running in >>> full (strict) Swift 4.0 mode which has some such breaking changes. >>> >>>> On Sep 13, 2017, at 3:56 PM, Rick Mann via swift-users >>>> <swift-users@swift.org> wrote: >>>> >>>> I have an iOS app in which I'm factoring out code into a Framework. In >>>> Xcode 9 GM (Swift 4), the code builds fine when it's a monolithic app, but >>>> some of the files I've pulled into the framework are no longer compiling. >>>> One of the errors is: >>>> >>>> Model.swift:471:14: 'dynamic' var 'dateCreated' must also be '@objc' >>>> >>>> The class looks like: >>>> >>>> import Foundation >>>> >>>> class >>>> MPObject : NSObject >>>> { >>>> .... >>>> dynamic var dateCreated : Date? >>>> .... >>>> } >>>> >>>> If I add @objc to each dynamic member, it seems to silence the errors, but >>>> the @objc should be implicit due to inheriting from NSObject, and as I >>>> said, it builds without error as a monolithic app. >>>> >>>> -- >>>> Rick Mann >>>> rm...@latencyzero.com >>>> >>>> >>>> _______________________________________________ >>>> swift-users mailing list >>>> swift-users@swift.org >>>> https://lists.swift.org/mailman/listinfo/swift-users >>> >> >> >> -- >> Rick Mann >> rm...@latencyzero.com >
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