From: haskell-cafe-bounces@haskell.org [mailto:haskell-cafe-bounces@haskell.org] On Behalf Of Simon Michael
Is there a type or library out there that's good for representing money and other quantities while avoiding rounding errors ?
I think Data.Fixed would be a good choice: http://www.haskell.org/ghc/docs/latest/html/libraries/base/Data-Fixed.ht ml I don't know /exactly/ how you'd go about adding a Money data type; I guess you'd have something like:
data E2 = E2 instance HasResolution E2 where resolution _ = 100 type Money = Fixed E2
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