Generic “Functions” in Objective-C

Arkadiusz Holko:

Since the only way to declare generic parameters and return values is through a class interface, we’ll wrap our map method in a new class[…]

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AHKArrayMapper’s only method takes an array of InputType objects and a block mapping from InputType to OutputType. It returns an array of OutputType objects. The implementation doesn’t really differ from the one without generics, because generics aren’t available in implementation files[…]

Objective-C generics are useful for interfacing with Swift and for documenting APIs. I’m not sure that it really makes sense to code with them this way.

Cocoa iOS Language Design Mac Objective-C Programming

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