[swift-corelibs-dev] Why URL doesn't have fileReferenceURL and isFileReferenceURL, but NSURL has?

[Ilya Laryionau]

Ole,

Thank you for a quick response.

Ilya

> On 6 Dec 2016, at 14:56, Ole Begemann <ole at oleb.net> wrote:
> 
>> The question is the subject, but anyway I’ll repeat it here: Why URL
>> doesn't have fileReferenceURL and isFileReferenceURL, but NSURL has? Is
>> it by design? If it’s a bug I can create an issue in https://bugs.swift.org.
> 
> It seems this is intentional, see SR-2728: https://bugs.swift.org/browse/SR-2728.
> 
> Tony Parker wrote in a comment there:
> 
> "Note that it is expected behavior that `struct URL` does not support file reference URLs.
> 
> The unfortunate part here is that we don't have a mechanism to keep `NSURL.fileReferenceURL` from being imported as returning `struct URL` instead of `NSURL`. We probably need to add an ObjC thunk in the overlay and mark the API as `NS_REFINED_FOR_SWIFT` in the NSURL.h header. However, that would be a source breaking change."