Swift Combine: Unable to infer complex closure return type error

Question

I have the following function:

func generateIn() -> Future<Int,Never> {
    return Future{ promise in
        promise(.success(Int.random(in: 1...10)))
    }
}

and I'm calling that function from this variable:

let sub2 = generateIn()
    .map { value in
        print(value)
        return Int(value)
    }

But I'm getting this error:

Unable to infer complex closure return type; add explicit type to disambiguate

Any of you knows why I'm getting this error or how can fix it?

I'll really appreciate your help

Answer 1

Do what it asks you to do; tell it what type the closure is.

    let sub2 = generateIn()
        .map { (value:Int) -> Int in
            print(value)
            return Int(value)
        }