Swift dynamicType does not work with generic function -

say have protocol:

protocol vehiclemodel {...} 

it implemented number of different structs. (e.g. carmodel, truckmodel, etc.) have generic method vehicle's 'model identifier'.

func modelidentifierforvehicle<v: vehiclemodel>(vehicletype: v.type) -> string {   return "\(vehicletype)" } 

if call modelidentifierforvehicle(carmodel.self) returns "car" fine. if have polymorphic collections of vehiclemodel's , try call modelidentifierforvehicle(model.dynamictype) on each of them, xcode says "cannot invoke 'modelidentifierforvehicle' argument list of type (vehiclemodel.type)" why this? , how can work around it?

since you're converting vehicletype string in modelidentifierforvehicle, argue why need use constrain v vehiclemodel, or use generics @ all:

func typeidentifier(t: any.type) -> string {     return "\(t)" }    let vehicles: [vehiclemodel.type] = [carmodel.self, truckmodel.self] typeidentifier(vehicles[0]) // carmodel 

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if there's reason need use vehiclemodel, assuming vehiclemodel doesn't use self or associated type requirements, do:

func modelidentifierforvehicle(vehicletype: vehiclemodel.type) -> string {     return "\(vehicletype)" } 

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if you're using swift 2, instead use protocol extension:

extension vehiclemodel {     static var modelidentifier: string {         return "\(self.dynamictype)"     } }  // array earlier. vehicles[1].modelidentifier // truckmodel.type