[Haskell-cafe] Announce: EnumMap-0.0.1

John Van Enk vanenkj at gmail.com
Sat Aug 8 17:58:29 EDT 2009

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


On Sat, Aug 8, 2009 at 4:41 PM, Henning
Thielemann<lemming at henning-thielemann.de> wrote:
> On Sat, 8 Aug 2009, John Van Enk wrote:
>> Hi List,
>> I've uploaded a first version of EnumMap to hackage.
>> EnumMap is a generalization of IntMap that constrains the key to Enum
>> rather than forcing it to be Int. I have no idea what impact this has
>> on performance, but it still passes all the tests that ship with
>> IntMap. (My guess is that performance will be similar/identical unless
>> I've missed something.)
> Could that be implemented as wrapper around IntMap?

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