swift - Transform Reactive Cocoa SignalProducer into enum -

i'm trying transform api signalproducers enum loading, failed , loaded states. enum is:

enum dataloadstate<datatype>{     case loading     case failed     case loaded(datatype) } 

to transform signalproducer noerror producer , start loading state:

extension signalproducertype{     func materializetoloadstate() -> signalproducer<dataloadstate<value>,noerror>{         let producer = self         .map(dataloadstate.loaded)         .startwithvalue(dataloadstate.loading)          return producer.ignoreerrors(replacementvalue:dataloadstate<value>.failed)     } }  extension signalproducertype {      func startwithvalue(value:value)->signalproducer<value,error>{         return signalproducer(value:value).concat(self.producer)     }      public func ignoreerrors(replacementvalue replacementvalue: self.value? = nil) -> signalproducer<self.value, noerror> {         return self.flatmaperror { error in             return replacementvalue.map(signalproducer.init) ?? .empty         }     } } 

it works don't want ignore errors, instead want include in failed case:

enum dataloadstate<datatype>{     case loading     case failed(apierror?)     case loaded(datatype) } 

any idea on how can use flatmaperror (like in ignoreerror) errors fired dataloadstate.failed(error) instead of being ignored? when error isn't display error nil. possible?

ok, fixed with:

producer.flatmaperror { error in signalproducer(value:.failed(error as? apierror)) }