[swift-corelibs-dev] Query on bridgeable classes

[Philippe Hausler]

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 at swift.org> wrote:
> 
> For example  NSURLComponents is not CFBridgeable.
> 
> - Nethra Ravindran
> 
> On Tue, Feb 21, 2017 at 3:01 PM, Alex Blewitt <alblue at apple.com <mailto:alblue at 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 at swift.org <mailto:swift-corelibs-dev at 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 <nethraravindran94 at gmail.com <mailto:nethraravindran94 at 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 at swift.org <mailto:swift-corelibs-dev at 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 at swift.org
> https://lists.swift.org/mailman/listinfo/swift-corelibs-dev

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.swift.org/pipermail/swift-corelibs-dev/attachments/20170221/18381c31/attachment.html>