The reasoning why is that some classes are designed as a has-a relationship instead of an is-a relationship. For example a NSRunLoop has a CFRunLoopRef but a NSString is a CFStringRef. This means that you cannot pass a NSRunLoop to a function that takes a CFRunLoopRef by design. Where-as any method that takes a CFStringRef can take a NSString.
The reasoning for this behavior is to match the behavior of the objective-c version of Foundation. > On Feb 21, 2017, at 10:20 AM, Nethra Ravindran via swift-corelibs-dev > <swift-corelibs-dev@swift.org> wrote: > > For example NSURLComponents is not CFBridgeable. > > - Nethra Ravindran > > On Tue, Feb 21, 2017 at 3:01 PM, Alex Blewitt <alb...@apple.com > <mailto:alb...@apple.com>> wrote: > Do you have a couple of examples that you're referring to? > > Alex > >> On 21 Feb 2017, at 09:25, Nethra Ravindran via swift-corelibs-dev >> <swift-corelibs-dev@swift.org <mailto:swift-corelibs-dev@swift.org>> wrote: >> >> Hi everyone, >> >> To be more precise, I would like to know why few classes are not >> CFBridgeable. >> >> Thank you. >> >> - Nethra Ravindran >> >> On Tue, Feb 21, 2017 at 2:20 PM, Nethra Ravindran >> <nethraravindra...@gmail.com <mailto:nethraravindra...@gmail.com>> wrote: >> Hi, >> >> I see that some classes are bridgeable and some are not. It would be great >> if someone can explain why few classes are not bridgeable. >> >> Thank you! >> >> - Nethra Ravindran >> >> _______________________________________________ >> swift-corelibs-dev mailing list >> swift-corelibs-dev@swift.org <mailto:swift-corelibs-dev@swift.org> >> https://lists.swift.org/mailman/listinfo/swift-corelibs-dev >> <https://lists.swift.org/mailman/listinfo/swift-corelibs-dev> > > > _______________________________________________ > swift-corelibs-dev mailing list > swift-corelibs-dev@swift.org > https://lists.swift.org/mailman/listinfo/swift-corelibs-dev
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