[Haskell-cafe] Illegal type def

Philip Weaver philip.weaver at gmail.com
Sat Dec 1 22:03:39 EST 2007


Should work with glasgow extensions (-fglasgow-exts).

- Phil

On Dec 1, 2007 6:43 PM, PR Stanley <prstanley at ntlworld.com> wrote:

> Hi
>  > type assoc k v = [(k, v)]
>
> works beautifully and everything makes sense.
>
>  > type Assoc v = (Ord k) => [(k, v)]
>
> This doesn't work. Is there any wayof defining k as an element of
> type Ordinal. I could redefine k by putting Char or Int in its place.
> Why can't I be more general?
> Thanks,
> Paul
>
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