On Mon, May 23, 2016, at 04:33 PM, Jens Alfke wrote: > >> On May 23, 2016, at 12:25 PM, Ryan Lovelett via swift-users <swift- >> us...@swift.org> wrote: >> >> However it seems that Foundation on Linux has neither >> `CFBooleanGetTypeID` or `CFGetTypeID`. > > Those are part of CoreFoundation, the C library on which the Mac/iOS > Foundation framework is built. The two have a complicated > relationship; Foundation exposes most but not all of the > CoreFoundation APIs as Objective-C, but there are still some features > you have to drop down to C to use. This is one. > > But I think you’re using the in-development Swift Foundation? That’s a > different implementation entirely. Presumably it will have some API of > its own to determine the type of a number. Yes I'm using the in-development Swift Foundation. From what I can tell this version is the one that will be used on non-Darwin platforms. Assuming that such an API does not currently exist on NSNumber, I'm reasonably confident that it does not, does this mean that a Swift Evolution thread has to be started to add it? > > —Jens
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