Simon, We rely extensively on GADTs for modelling musical harmony in HarmTrace:
PDF: http://www.dreixel.net/research/pdf/fmmh.pdf Hackage: http://hackage.haskell.org/package/HarmTrace Not entirely sure it passes (c), though. Cheers, Pedro On Tue, Aug 14, 2012 at 1:32 PM, Simon Peyton-Jones <simo...@microsoft.com>wrote: > Friends**** > > > I’m giving a series of five lectures at the Laser Summer > School<http://laser.inf.ethz.ch/2012/>(2-8 Sept), on “Adventures with types > in Haskell”. My plan is: > **** > > **1. **Type classes**** > > **2. **Type families [examples including Repa type tags]**** > > **3. **GADTs**** > > **4. **Kind polymorphism**** > > **5. **System FC and deferred type errors**** > > ** ** > > This message is to invite you to send me your favourite example of using a > GADT to get the job done. Ideally I’d like to use examples that are (a) > realistic, drawn from practice (b) compelling and (c) easy to present > without a lot of background. Most academic papers only have rather limited > examples, usually eval :: Term t -> t, but I know that GADTs are widely > used in practice.**** > > ** ** > > Any ideas from your experience, satisfying (a-c)? If so, and you can > spare the time, do send me a short write-up. Copy the list, so that we can > all benefit.**** > > ** ** > > Many thanks**** > > > Simon**** > > _______________________________________________ > Glasgow-haskell-users mailing list > Glasgow-haskell-users@haskell.org > http://www.haskell.org/mailman/listinfo/glasgow-haskell-users > >
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