Result.swift

public protocol ResultProtocol {
    associatedtype Success
    associatedtype Failure: Error

    var result: Result<Success, Failure> { get }
}

extension Result: ResultProtocol {
    public var result: Result<Success, Failure> {
        return self
    }
}

public extension Result {
    func recover(_ recovery: (Failure) -> Success) -> Result<Success, Never> {
        switch self {
        case let .success(value):
            return .success(value)
        case let .failure(error):
            return .success(recovery(error))
        }
    }
}

public extension Result where Failure == Never {
    var success: Success {
        switch self {
        case let .success(value):
            return value
        }
    }
}