> And it is not enough to provide just a driver function, that is called in 
> 'main', say
>    run :: IOArrow a b -> a -> IO b
> ?
No, because I need to compile the stream processing program itself by a
different tool. I just want to trick GHC into doing much of the
weightlifting. No IO monad is involved, by the way, the stream processor
is supposed to be a pure transformation.

Gergely

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