Re: Proposal: Num instance for tuples

On Thu, 18 Oct 2012, Twan van Laarhoven wrote:

One piece of utility code that I find myself writing over and over again is the pointwise Num instance for tuples, i.e.

For my taste, writing 2 :: (Int, Integer) abs (x,y) should yield a compiler error and the compiler should not try to interpret it in some way. For the cases where you need these instances I suggest you use custom data types.