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

[Edward Kmett]

That and it prevents the obvious instance for Bool.

On Fri, Sep 16, 2011 at 8:51 PM, John Meacham <john at repetae.net> wrote:

> 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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>
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