[swift-evolution] Requesting default values for Cocoa/Cocoa Touch APIs

Russ Bishop xenadu at gmail.com
Mon Apr 11 16:28:57 CDT 2016

Wouldn’t this be the responsibility of UIKit/AppKit teams to provide extensions that pass the default values?


> On Apr 8, 2016, at 10:40 AM, Erica Sadun via swift-evolution <swift-evolution at swift.org> wrote:
> Is there a best way to request default values for common Cocoa and Cocoa Touch APIs? 
> Now that we're moving to Swift, the language supports defaults and omitted parameters
> but the ObjC APIs do not (yet) supply them. 
> For example, dismissViewControllerAnimated(flag: true, completion: nil) 
> could become dismissAnimated() when default values are available for flag and completion.
> There's a large-ish class of these boilerplate defaults and it would be nice if there were a way to
> be able to request them.
> cc'ing in Daniel S whose idea this is.
> Thanks, -- E
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