Service.swift

public struct Service {

    public enum LifeCycle {
       case global
       case oneOf
    }

    /// Holds the lifecycle of the current service
    public var cycle: LifeCycle

    /// Unique name for each service
    public let name: ObjectIdentifier

    /// The closure that will resolve the service
    private let resolve: (Dependencies) -> Any

    var instance: Any?

    func createInstance(d: Dependencies) -> Any {
       return resolve(d)
    }

    /// Initialize a service with a resolver
    public init<Service>(_ cycle: LifeCycle = .oneOf, _ resolve: @escaping (Dependencies) -> Service) {

        self.name = ObjectIdentifier(Service.self)
        self.resolve = resolve
        self.cycle = cycle
    }
}