C Lenses in Blocks

Question

Despite its name, this question does not seem to affect it.

Is it possible to use Objective-C generics with blocks?

Sort of:

typedef void (^MyResultBlock<__covariant ObjectType>)(NSArray<ObjectType> *items);

... and then declare a block:

MyResultBlock<NSNumber> blockName = ^void(NSArray<NSNumber> *items) {...};

Answer 1

No. Objective-C generics are for classes only, not typedefs.