On Thu, 7 Feb 2013, alex wrote:
Now I have idea for making this more interesting and practical (for live music-making, if nothing else), and would like to re-write it all in Haskell. Testing type compatibility of expressions is foxing me though. For example, say I have (++) and [1,2,3]. I then want to see if a value of type (Num a => [a]) can be applied to a function of type ([a] -> [a] -> [a]).
That is, you want to do Haskell type checking in Haskell? I do not understand how Typeable could help here. If you are happy with a simplified Haskell type system you could try the type checker from the Helium project. I have also heard that the Haskell suite shall contain a type checker.
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