On Mon, Sep 13, 2010 at 4:23 PM, Nick Bowler <nbow...@elliptictech.com> wrote: > ... not all Num instances have an associative (+).
Indeed: $ cabal install repr # [1] ... $ ghci Prelude> :m Text.Repr Prelude Text.Repr> show (1 + 2 :: Repr Int) == show (2 + 1 :: Repr Int) False because: show (1 + 2 :: Repr Int) == "1 + 2" show (2 + 1 :: Repr Int) == "2 + 1" but note: Prelude Text.Repr> (1 + 2 :: Repr Int) == (2 + 1 :: Repr Int) True Bas [1] http://hackage.haskell.org/package/repr _______________________________________________ Haskell-prime mailing list Haskell-prime@haskell.org http://www.haskell.org/mailman/listinfo/haskell-prime
