Objective C syntax corresponding to Swift "extension where self: "

Question

Is there any way to extend a class in Objective C only for those subclasses that conform to a protocol, like that in Swift:

extension SomeClass where self: SomeProtocol {
// some code
}

Thanks @Rob. Could you provide this as an answer and I'll accept it? — CodeBrew, Feb 22 '21 at 16:25

score 1 · Accepted Answer · answered Feb 22 '21 at 16:29

1

There is no Objective-C syntax for that. (Not sure if there’s even a Swift syntax like this; we have a generic where clause, but not on self. And Objective-C doesn’t offer full generic implementation, only offering lightweight implementation.)

answered Feb 22 '21 at 16:29

Rob

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There is a `where self` (well, tather `where Self:`) https://stackoverflow.com/questions/46018677/what-is-where-self-in-protocol-extension – Larme Feb 22 '21 at 19:27
1

Yep, for Swift protocols, but not classes. And not in ObjC. – Rob Feb 22 '21 at 19:42

Objective C syntax corresponding to Swift "extension where self: "

1 Answers1