John Sundell • 6/9/2022

Using the ‘some’ and ‘any’ keywords to reference generic protocols in Swift 5.7

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This technical article details how Swift 5.7 introduces the 'some' and 'any' keywords to resolve the common compiler error "Protocol can only be used as a generic constraint." It explores opaque parameter types and existential types, using a practical `Group` protocol example to show how these new features simplify working with protocols that have associated types, reducing code duplication.

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#generics #type erasure #Protocols
Using the ‘some’ and ‘any’ keywords to reference generic protocols in Swift 5.7

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