Proposal: split Chan and TChan into read and write ends

[Johan Tibell]

On Fri, Oct 26, 2012 at 8:23 PM, Brandon Simmons
<brandon.m.simmons at gmail.com> wrote:
> Hi everybody,
> Just discovered all the great discussion here, and although my
> google-fu turned up no prior discussions on this subject, I apologize
> if it has already been discussed.
>
> I propose that Chan and TChan should be implemented as a pair of read
> and write ends, initialized as follows:
>
>     newSplitChan :: IO (InChan a, OutChan a)
>
> I've implemented this already here:
> http://hackage.haskell.org/package/chan-split . You can ignore the
> type classes I've defined; they're there for my own reasons and not
> part of the proposal.

I think this makes for a great package or perhaps an extra
Unidirectional module nested inside the Chan module. Breaking the well
used Chan API doesn't seem necessary in this case.