[Haskell-cafe] Why were datatype contexts removed instead of "fixing them"?

[Kim-Ee Yeoh]

On Thu, Apr 25, 2013 at 6:36 PM, Joe Quinn <headprogrammingczar at gmail.com>wrote:

> data Foo a where
>   Foo :: Eq a => a -> Foo a
>

is equivalent to

data Foo a = Eq a => Foo a

but is different from

data Eq a => Foo a = Foo a

(Yup, tripped up a few of us already!)

-- Kim-Ee
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