How to convert to task?

Probably a stupid question, but I need to convert a Job to a Task because I’m using Giraffe, which is using Task for its HttpHandlers. How can I convert a job to a task? I can’t find any functions in Job with the right signature (I can only find functions from Task to Job, not the other way).

[cmeeren]

Thanks! I may not properly understand Job or Hopac; I’m currently experimenting with replacing all internal Async stuff in a framework of mine with Job to see if I get better performance (there’s a lot of lifting non-async user code to Async all over the place which causes a bunch of allocations etc.)

[cmeeren]

Thanks! Since I’m not used to the infixes, I found the below clearer:

let startAsTask (xJ: Job<'x>): Task<'x> =
    let tcs = new TaskCompletionSource<'x>()
    job {
      try
        let! x = xJ
        tcs.SetResult x
      with ex -> tcs.SetException ex
    }
    |> start
    tcs.Task