to enum type and back

[ingo]

Thank you so far, something to study. Coming back to bigT, there is a bit more:
    
    
    type
      Message*[T] = object
        topic*: string
        id*: string
        msgtype*: string   #"p/s", "req/rep", "reply". req/rep requires id
        msg*: T
      
      Subscriber*[T] = object
        fs*: FutureStream[Message[T]]
        subscriptions*: seq[string]  #topic strings
        topics*: seq[string]         #topic strings
        source*: string              #name of proc
        id*: string
      
      Bus*[T] = object
        subscribers*: Table[string, Subscriber[T]]        #table[subscriber id, 
subscriber object]
        topicSubscribers*: Table[string, seq[string]]  #table[topic string, 
seq[subscriber id's]]
        fsBus*: FutureStream[Message[T]]
    
    
    #bus is the input stream for the broker.
    #all messages to be distributed should be written to this stream.
    var bus* = Bus(
      fsBus: newFutureStream[Message[T]](fromProc = "main")
    )
    
    
    Run

this gives an error:
    
    
    _02.nim(27, 15) Error: object constructor needs an object type [genericBody 
declared [...]\psbus_02.nim(19, 3)]
    
    Run