I believe it's:
#if __has_feature(nullability)
On 13 June 2015 at 11:54, Jonathan Schleifer <[email protected]>
wrote:
> Hi!
>
> I saw that there's a __has_feature() for objc_generics and objc_kindof,
> however, there doesn't seem to be objc_nullability or similar. Since the
> sources for the Clang from Xcode 7 haven't been released, I grepped through
> `strings clang`, however, I could not find anything useful.
>
> What is the best way to check if the compiler supports nullability, so
> that if not I can #define nonnull and friends to nothing?
>
> PS: I also found objc_generics_variance - what's that?
>
> --
> Jonathan
>
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