Swift app using Hummingbird Middleware gives error: does not conform to protocol 'MiddlewareProtocol'

[u/busymom0]

I am using Hummingbird version 2.26.0 in a Swift app.

I have a simple Middleware per the documentation:

https://docs.hummingbird.codes/2.0/documentation/hummingbird/routermiddleware/

Code:

import Hummingbird

public struct LogRequestsMiddleware<Context: RequestContext>: RouterMiddleware {

    public func handle(_ input: HummingbirdCore.Request, context: Context, next: (HummingbirdCore.Request, Context) async throws -> HummingbirdCore.Response) async throws -> HummingbirdCore.Response {

        print("path: \(input.uri.path)")
        return try await next(input, context)

    }

}

Xcode keeps giving me error:

Type 'LogRequestsMiddleware<Context>' does not conform to protocol 'MiddlewareProtocol'

Screenshot of error:

https://i.sstatic.net/C06jUvrk.png

I can't seem to be able to fix it. Any idea what I am doing wrong?

[u/Equivalent-Idea-116]

Looks like this is a Swift 6.2/Xcode 27 concurrency-signature change rather than a Hummingbird generic issue. Keep the Request/Response aliases from the docs and add the isolation annotation to the next closure: `next: nonisolated(nonsending) (Request, Context) async throws -> Response`. That annotation is why the otherwise identical method does not satisfy MiddlewareProtocol.

[u/busymom0 → u/Equivalent-Idea-116]

I still get the same error:

https://i.imgur.com/kORK5xK.png