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Joinads' "One place buffer" sample ported to Hopac

https://github.com/tpetricek/FSharp.Joinads/blob/master/src/Joins/Samples.fs#L60 ported to Hopac.

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(open declarations)

let put, get, empty, contains = ch(), ch(), ch(), ch()

// Initially, the buffer is empty
run (empty <-+ ())

Job.foreverServer (
    Alt.choose [ empty >> (put >>= Ch.send contains)
                 contains >>=? fun v -> Ch.send get v >>. Ch.send empty () ])
|> run

// Repeatedly try to put value into the buffer
job { do! Async.Sleep 1000
      for i in 0 .. 10 do
          printfn "putting: %d" i
          do! put <-- string i
          do! Async.Sleep 500 }
|> start

// Repeatedly read values from the buffer and print them
job { while true do 
          do! Async.Sleep 250
          let! v = get
          printfn "got: %s" v }
|> start
open Hopac
open Hopac.Infixes
open Hopac.Job.Infixes
open Hopac.Alt.Infixes
val put : Ch<string>

Full name: Script.put
val get : Ch<string>

Full name: Script.get
val empty : Ch<unit>

Full name: Script.empty
val contains : Ch<string>

Full name: Script.contains
val run : Job<'x> -> 'x

Full name: Hopac.TopLevel.run
type Job<'T> =

Full name: Hopac.Job<_>
val foreverServer : Job<unit> -> Job<unit>

Full name: Hopac.Job.foreverServer
type Alt<'T> =
  inherit Job<'T>

Full name: Hopac.Alt<_>
val choose : seq<#Alt<'x>> -> Alt<'x>

Full name: Hopac.Alt.choose
Multiple items
type Ch<'T> =
  inherit Alt<'T>
  new : unit -> Ch<'T>

Full name: Hopac.Ch<_>

--------------------
Ch() : unit
val send : Ch<'x> -> 'x -> Job<unit>

Full name: Hopac.Ch.send
val v : string
val job : JobBuilder

Full name: Hopac.TopLevel.job
Multiple items
type Async
static member AsBeginEnd : computation:('Arg -> Async<'T>) -> ('Arg * AsyncCallback * obj -> IAsyncResult) * (IAsyncResult -> 'T) * (IAsyncResult -> unit)
static member AwaitEvent : event:IEvent<'Del,'T> * ?cancelAction:(unit -> unit) -> Async<'T> (requires delegate and 'Del :> Delegate)
static member AwaitIAsyncResult : iar:IAsyncResult * ?millisecondsTimeout:int -> Async<bool>
static member AwaitTask : task:Task<'T> -> Async<'T>
static member AwaitWaitHandle : waitHandle:WaitHandle * ?millisecondsTimeout:int -> Async<bool>
static member CancelDefaultToken : unit -> unit
static member Catch : computation:Async<'T> -> Async<Choice<'T,exn>>
static member FromBeginEnd : beginAction:(AsyncCallback * obj -> IAsyncResult) * endAction:(IAsyncResult -> 'T) * ?cancelAction:(unit -> unit) -> Async<'T>
static member FromBeginEnd : arg:'Arg1 * beginAction:('Arg1 * AsyncCallback * obj -> IAsyncResult) * endAction:(IAsyncResult -> 'T) * ?cancelAction:(unit -> unit) -> Async<'T>
static member FromBeginEnd : arg1:'Arg1 * arg2:'Arg2 * beginAction:('Arg1 * 'Arg2 * AsyncCallback * obj -> IAsyncResult) * endAction:(IAsyncResult -> 'T) * ?cancelAction:(unit -> unit) -> Async<'T>
static member FromBeginEnd : arg1:'Arg1 * arg2:'Arg2 * arg3:'Arg3 * beginAction:('Arg1 * 'Arg2 * 'Arg3 * AsyncCallback * obj -> IAsyncResult) * endAction:(IAsyncResult -> 'T) * ?cancelAction:(unit -> unit) -> Async<'T>
static member FromContinuations : callback:(('T -> unit) * (exn -> unit) * (OperationCanceledException -> unit) -> unit) -> Async<'T>
static member Ignore : computation:Async<'T> -> Async<unit>
static member OnCancel : interruption:(unit -> unit) -> Async<IDisposable>
static member Parallel : computations:seq<Async<'T>> -> Async<'T []>
static member RunSynchronously : computation:Async<'T> * ?timeout:int * ?cancellationToken:CancellationToken -> 'T
static member Sleep : millisecondsDueTime:int -> Async<unit>
static member Start : computation:Async<unit> * ?cancellationToken:CancellationToken -> unit
static member StartAsTask : computation:Async<'T> * ?taskCreationOptions:TaskCreationOptions * ?cancellationToken:CancellationToken -> Task<'T>
static member StartChild : computation:Async<'T> * ?millisecondsTimeout:int -> Async<Async<'T>>
static member StartChildAsTask : computation:Async<'T> * ?taskCreationOptions:TaskCreationOptions -> Async<Task<'T>>
static member StartImmediate : computation:Async<unit> * ?cancellationToken:CancellationToken -> unit
static member StartWithContinuations : computation:Async<'T> * continuation:('T -> unit) * exceptionContinuation:(exn -> unit) * cancellationContinuation:(OperationCanceledException -> unit) * ?cancellationToken:CancellationToken -> unit
static member SwitchToContext : syncContext:SynchronizationContext -> Async<unit>
static member SwitchToNewThread : unit -> Async<unit>
static member SwitchToThreadPool : unit -> Async<unit>
static member TryCancelled : computation:Async<'T> * compensation:(OperationCanceledException -> unit) -> Async<'T>
static member CancellationToken : Async<CancellationToken>
static member DefaultCancellationToken : CancellationToken

Full name: Microsoft.FSharp.Control.Async

--------------------
type Async<'T>

Full name: Microsoft.FSharp.Control.Async<_>
static member Async.Sleep : millisecondsDueTime:int -> Async<unit>
val i : int
val printfn : format:Printf.TextWriterFormat<'T> -> 'T

Full name: Microsoft.FSharp.Core.ExtraTopLevelOperators.printfn
Multiple items
val string : value:'T -> string

Full name: Microsoft.FSharp.Core.Operators.string

--------------------
type string = System.String

Full name: Microsoft.FSharp.Core.string
val start : Job<unit> -> unit

Full name: Hopac.TopLevel.start
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More information

Link:http://fssnip.net/p3
Posted:2 years ago
Author:Vasily Kirichenko
Tags: async , hopac , joinads