ios - Infer type to generics from function's return type -

i have storyboard , view controllers in it. storyboard id of every view controllers same class name assigned it. like: walkthrough view controller assigned walkthroughvc class , storyboard id walkthroughvc.

i made function below, instance of view controller storyboard:

func getviewcontroller<t: uiviewcontroller>() -> t? {      let sb = uistoryboard(name: "main", bundle: nil)      sb.instantiateviewcontrollerwithidentifier(viewcontroller.rawvalue) as? t } 

is possible infer type of t? if yes, how?

i think looking for.

class viewcontrollers {     class func getviewcontroller<t : uiviewcontroller>(fromstoryboard : string, fromclass : t) -> t?     {         let storyboard = uistoryboard(name: fromstoryboard, bundle: nil)         let controller = storyboard.instantiateviewcontrollerwithidentifier("\(fromclass)") as? t         return controller     } }