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I pulled the Euterpea source from the website and tried the tutorial in GHCi 7.0.4. It complained that the definition of times (n+1) m is invalid. If anyo

I pulled the Euterpea source from the website and tried the tutorial in GHCi 7.0.4. It complained that the definition of times (n+1) m is invalid. If anyone is trying out the tutorial and gets the same error, replace that definition of "times" with times n m = m :+: (times (n-1) m) and you should be good.

zura 14y ago
Hm, I guess that means n+k pattern matching is finally removed.
- sold 14y ago
  Yes, it was removed in the Haskell 2010 standard, which is the default from GHC 7.0. http://hackage.haskell.org/trac/haskell-prime/wiki/RemoveNPlusK http://hackage.haskell.org/trac/haskell-prime/wiki/RemoveNPl...