Num superclass of Bits (Was: Proposal: Remove Show and Eq superclasses of Num)

[John Meacham]

I also really dislike that superclass of bits, there is no need for it.

    John

On Fri, Sep 16, 2011 at 5:12 AM, Henning Thielemann
<lemming at henning-thielemann.de> wrote:
>
> On Fri, 16 Sep 2011, Herbert Valerio Riedel wrote:
>
>> Just as a side note: I also dislike that the Data.Bits.Bits type-class
>> has Num as its superclass; If I need something to be an instance of the
>> Bits class for the bit-ops, I don't usually want to be forced to provide
>> multiplication and addition operations as well...
>
> Me too. For instance when working with flag sets like in [1], addition,
> multiplication, absolute value, number literals make no sense.
>
> [1] http://hackage.haskell.org/package/enumset
>
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