> On Jan 4, 2016, at 3:09 PM, Tony Parker <anthony.par...@apple.com> wrote:
>
> In this particular case, how would you use the #if? Any should be source
> compatible with AnyObject, since Any is a superset of AnyObject, right?
Well I don't know what you mean by "compatible" but the thing about strongly
typed languages is we can't do
let a: Any
foo(a: AnyObject) { /* */ }
foo(a)
because that is "type error". We can of course cast, but if in Darwin a.self
is already AnyObject, casting again to AnyObject produces a warning, and I try
to not have any warnings in my code.
This is kind of a side quest–there are a lot of ways to work around these
problems–but the obviously straightforward one was to use #if to conditionally
cast, and that wasn't available.
More broadly I find myself using the #if that I've created very often–my
workflow seems to be to create an extension on an NSClass in-file that adds
missing functionality and then PR it to corelibs-foundation afterwards–and
conditional compilation really helps with that workflow._______________________________________________
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