eraseToAnyPublisher は将来的には↓のようにできるようになると思います。 func f1() -> some Publisher<.Output = Int, .Failure = Never> { Just(1) }

3:37 AM

↓の Future Directions https://github.com/apple/swift-evolution/blob/main/proposals/0328-structural-opaque-result-types.md#future-directions

swift-evolution/0328-structural-opaque-result-types.md at main · ap...

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - swift-evolution/0328-structural-opaque-result-types.md at main · apple/swift-evolution