On Tue, Feb 11, 2014 at 2:42 AM, Gabriel Gonzalez <[email protected]> wrote:
> Ok, I think I found an approach that will satisfy everybody. This solution
> only requires providing three utility functions in `pipes-parse`:
>
> debugView
> :: (Producer a m x -> Producer b m y)
> -> (Producer a m x -> Producer b m y)
> debugView = id
>
> debugZoom
> :: (StateT (Producer a m x) m r -> StateT (Producer b m y) m r)
> -> (StateT (Producer a m x) m r -> StateT (Producer b m y) m r)
> debugZoom = id
>
> debugOver
> :: ( (Producer a m w -> Producer b m x)
> -> (Producer c m y -> Producer d m z) )
> -> ( (Producer a m w -> Producer b m x)
> -> (Producer c m y -> Producer d m z) )
> debugOver = id
>
> The following example shows how you would use it (see the `p3` example):
>
> http://lpaste.net/99760
Ah, this is great! I like this solution.
Besides, the GHC error message is quite precise about where the error
happens, so users aware of the
existence of `debugView` and the other debug functions can readily
realize when they need to use them.
In the first argument of `view', namely `decoded'
In the second argument of `(>->)', namely `view decoded PB.stdin'
Regards,
Renzo Carbonara.
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