Dan Doel wrote:
Hope that helps.
It does, thanks!
Jeremy
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Jeremy Yallop wrote:
> Why does compiling the following program give an error?
>
>> {-# LANGUAGE TypeFamilies, RankNTypes #-}
>>
>> type family TF a
>>
>> identity :: (forall a. TF a) -> (forall a. TF a)
>> identity x = x
>
> GHC 6.10.3 gives me:
>
> Couldn't match expected type `TF a1' against
On Saturday 11 July 2009 2:31:28 pm Jeremy Yallop wrote:
> Why does compiling the following program give an error?
>
> > {-# LANGUAGE TypeFamilies, RankNTypes #-}
> >
> > type family TF a
> >
> > identity :: (forall a. TF a) -> (forall a. TF a)
> > identity x = x
>
> GHC 6.10.3 gives me:
>
> C
* Brandon S. Allbery KF8NH [2009-07-11 17:01:35-0400]
> On Jul 11, 2009, at 14:31 , Jeremy Yallop wrote:
>> Why does compiling the following program give an error?
>>
>>> {-# LANGUAGE TypeFamilies, RankNTypes #-}
>>>
>>> type family TF a
>>>
>>> identity :: (forall a. TF a) -> (forall a. TF a)
>>>
On Jul 11, 2009, at 14:31 , Jeremy Yallop wrote:
Why does compiling the following program give an error?
{-# LANGUAGE TypeFamilies, RankNTypes #-}
type family TF a
identity :: (forall a. TF a) -> (forall a. TF a)
identity x = x
The scope of each a is the surrounding parentheses, so the de
Why does compiling the following program give an error?
{-# LANGUAGE TypeFamilies, RankNTypes #-}
type family TF a
identity :: (forall a. TF a) -> (forall a. TF a)
identity x = x
GHC 6.10.3 gives me:
Couldn't match expected type `TF a1' against inferred type `TF a'
In the expression
