Proposal: Num instance for tuples

[Edward Kmett]

Our V2 doesn't *quite* match, since V2 requires the two fields to have the
same type, but I agree. =)

On Thu, Oct 18, 2012 at 2:36 PM, Anthony Cowley <acowley at seas.upenn.edu>wrote:

> On Thu, Oct 18, 2012 at 4:47 PM, Ivan Lazar Miljenovic
> <ivan.miljenovic at gmail.com> wrote:
> > On 19 October 2012 04:57, Henning Thielemann
> > <lemming at henning-thielemann.de> wrote:
> >>
> >> On Thu, 18 Oct 2012, Brent Yorgey wrote:
> >>
> >>> I am +1 for this proposal, but only as long as these instances are not
> >>> exported by the Prelude.  They are useful when you know you want them
> >>> but will confuse newbies -- based on evidence from #haskell, where
> >>> lambdabot has such instances in scope.
> >>
> >>
> >> Please no orphan instances - I think a pair type that supports
> arithmetics
> >> deserves a custom type.
> >
> > Agreed.  Another -1 on the proposal from me.
>
> I am also with Henning, and a -1 for the proposal. If it's too
> confusing to export by default, then the instance belongs to a less
> general type. There are appropriate types that have the desired
> behavior all over hackage. I am currently partial to V2 from the
> linear package.
>
> Anthony
>
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