Consider a private CFLocaleKey that is later bridged as an NSLocaleKey (NSString) for use internally with NSLocale:
CF_EXPORT const CFLocaleKey kCFLocaleTemperatureUnit API_AVAILABLE(macosx(10.12), ios(10.0), watchos(3.0), tvos(10.0));
The most obvious way to reference something like this would be through a bridging header. But is there a way to reference this CF/NSLocaleKey with pure Swift using something like @_silgen_name?
First I tried:
@_silgen_name("NSLocaleTemperatureUnit")
public let temperatureUnit: NSLocale.Key
But the compiler complains:
@_silgen_name cannot be applied to this declaration
Ok, let's make it static, but static properties can only be declared on a type. So I tried setting it up in the way the other NSLocaleKey values are bridged to Swift, as an extension on NSLocale.Key:
extension NSLocale.Key {
@_silgen_name("NSLocaleTemperatureUnit")
public static let temperatureUnit: NSLocale.Key
}
Even with this, the compiler complains with the same error as above. This is where I got stuck. Does @_silgen_name only work for functions? Is what I'm asking even possible with pure Swift?
