[swift-evolution] [Review] SE-0160: Limiting @objc inference

[Hooman Mehr]

> On Mar 29, 2017, at 3:00 PM, Douglas Gregor via swift-evolution <swift-evolution at swift.org> wrote:
> 
> 
> * @implicitobjc added to a class implicitly makes members of that class *and all of its subclasses* @objc if they can be exposed to Objective-C
> * @implicitobjc added to a class extension makes members of that class extension @objc if they can be exposed to Objective-C
> 
> This is a more elegant way to handle the XCTestCase issue—we can mark XCTestCase as @implicitobjc through some Clang-side attribute or API note—and makes it easy for class hierarchies that rely heavily on the Objective-C runtime to continue to get @objc inference.

+1
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