Re: Proposal: Num instance for tuples

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 wrote:

On Thu, Oct 18, 2012 at 4:47 PM, Ivan Lazar Miljenovic wrote:

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On 19 October 2012 04:57, Henning Thielemann wrote:

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On Thu, 18 Oct 2012, Brent Yorgey wrote:

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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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