On Sat, 8 Aug 2009, John Van Enk wrote:
That's originally how I was thinking about doing it, but I think that
requires one to re-implement all the functions available in
Data.IntMap as simple wrappers that do the toEnum/fromEnum conversion.
I think making it into its own module is a little cleaner. The
conversion from EnumMap to IntMap is substantially cleaner than from
IntMap to EnumMap:
type IntMap v = EnumMap Int v
Can you implement EnumMap in terms of the Enum methods, without many
conversions to Int? I mean, if you often convert to Int and back then you
could achieve the same on top of IntMap. Generally I prefer the strategy
"from simple to complex". I consider Enum to be a "wrapper" around Int.
http://haskell.org/haskellwiki/Simple_to_complex
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