Swift Conditional Conformance with Any

Question

Let\'s assume an array of Result. We want the array to be reduced to a Result of an array. For example:

let z: [Result         


        

Answer 1

You can move constraints to the function to make it generic:

extension Array {
    func reduced() -> Result<[T], Error> where Element == Result {
        return self.reduce(.success([T]())) { accumulator, result in
            ...
        }
    }
}

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Note: A variable of type Int will not match Any as it's a different type. Variables of type Any need to be casted down to Int.