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.
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