role signatures in libraries

[Roman Cheplyaka]

* Carter Schonwald <carter.schonwald at gmail.com> [2013-11-27 14:14:29-0500]
> Richard has a paper or so on it, and theres some pretty extensive
> documentation/examples on the ghc wiki/trac  (though perhaps a more
> extensive exposition for normal haskellers is called for too?)

I find the explanation in Richard's email excellent — very clear and
accessible (except that, as Henning noted, it lacks the motivational
part). Great job!

Roman
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