[Haskell-cafe] commutativity

[Patrick Browne]

On 31/10/2010 16:55, Brent Yorgey wrote:
>> Note that the first parameter to commutative shadows the previous
>> definition of com, I don't know if that's what you intended.


Does the following avoid the shadowing?

infixl 5 `op`
op :: Int -> Int -> Int
x `op` y  = (x + y)
commutative op1 = \a b ->  (a `op` b) == (b `op` a)



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