John Sundell • 11/12/2022

Combining opaque return types with primary associated types

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This Swift programming article explains how to combine opaque return types (`some`) with primary associated types, introduced in Swift 5.7, to return generic protocols (like `Publisher`) from functions without cumbersome type erasure (e.g., `AnyPublisher`). It contrasts this with older patterns and demonstrates its practical use for cleaner API design in frameworks like Combine.

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#generics #Protocols #Swift
Combining opaque return types with primary associated types

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