John Sundell • 6/9/2022

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

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