[swift-evolution] Objective-C’s @compatibility_alias => Swift’s typealias?

[Nicholas Maccharoli]

+1

On Fri, Jul 1, 2016 at 8:47 AM, Ayaka Nonaka via swift-evolution <
swift-evolution at swift.org> wrote:

> That’s so great to hear. Thank you! :)
>
> On Thu, Jun 30, 2016 at 4:36 PM, Harlan Haskins <harlan at harlanhaskins.com>
> wrote:
>
>> +1. Robert and I are toying with an implementation right now; it’s really
>> straightforward.
>>
>> — Harlan
>>
>> On Jun 30, 2016, at 3:16 PM, Ayaka Nonaka via swift-evolution <
>> swift-evolution at swift.org> wrote:
>>
>> Hi Swift community,
>>
>>
>> I was wondering if bridging Objective-C’s @compatibility_alias to
>> Swift’s typealias is something that we have considered adding support
>> for.
>>
>> For example, @compatibility_alias is useful for things like adding an
>> alias like DCColor for UIColor and NSColor depending on the target.
>> Here’s an example from our codebase:
>>
>> // For color compatibility, we alias DCColor to the appropriate class
>> #if DC_TARGET_MOBILE
>> #import <UIKit/UIKit.h>
>> @compatibility_alias DCColor UIColor;
>> #else
>> #import <Cocoa/Cocoa.h>
>> @compatibility_alias DCColor NSColor;
>> #endif
>>
>> We expected DCColor to be exposed to our Swift code, but it turns out
>> that it is not. I’d imagine that we’re not the only ones using
>> @compatibility_alias for similar things and other things that are
>> useful. It would be really cool to see seamless bridging between
>> @compatibility_alias and typealias, especially since we’ve seen a lot of
>> other great backwards compatibility features in Swift 3.0 like importing
>> lightweight-generics and #keyPath.
>>
>> Thanks for reading! :D
>>
>> Ayaka
>>
>> --
>> Ayaka Nonaka
>> @ayanonagon <https://twitter.com/ayanonagon> | www.ayaka.me
>> _______________________________________________
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>> swift-evolution at swift.org
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>>
>>
>>
>
>
> --
> Ayaka Nonaka
> @ayanonagon <https://twitter.com/ayanonagon> | www.ayaka.me
>
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>
>
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