[swift-users] How to bridge between CoreFoundation and SwiftFoundation on Linux?

[Bouke Haarsma via swift-users]

Hi all,

When working with CoreFoundation objects (e.g. CFReadStream, 
CFWriteStream) it isn't immediately obvious to me how to bridge them to 
SwiftFoundation counterparts (InputStream / OutputStream).

The following works on OSX, but doesn't work on Linux;

   let readStream: CFReadStream = ...
   readStream as InputStream
   // error: cannot convert value of type 'CFReadStream' to expected 
argument type 'InputStream'

In some other places I need to bridge a String to a CFString, the 
following works on OSX, but doesn't work on Linux;

   let string: String = ...
   string as CFString
   // error: error: 'String' is not convertible to 'CFString'; did you 
mean to use 'as!' to force downcast?

Thanks.

--
-Bouke


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