Configured instance

ConfiguredInstance.swift

private func configured<Instance>(
    _ instance: Instance,
    configure: (Instance) -> Void
) -> Instance where Instance: AnyObject {
    configure(instance)
    return instance
}

infix operator <~

func <~<Instance>(
    instance: Instance,
    configure: (Instance) -> Void
) -> Instance  where Instance: AnyObject {
    return configured(instance, configure: configure)
}

Example.swift

let label1 = UILabel() <~ {
    $0.text = "Some text"
}

let label2 = {
    let label = UILabel()
    label.text = "Some text"
    return label
}()