2012/6/8 Brent Yorgey byor...@seas.upenn.edu:
On Thu, Jun 07, 2012 at 07:32:45PM +0100, ex falso wrote:
we always have to put the class restriction (TupleLength l) there,
even though all possible type constructors of [*] have a TupleLength
instance defined!
Yes, and this is a feature, for
On Thu, Jun 07, 2012 at 07:32:45PM +0100, ex falso wrote:
we always have to put the class restriction (TupleLength l) there,
even though all possible type constructors of [*] have a TupleLength
instance defined!
Yes, and this is a feature, for at least two reasons.
First: to the extent that
Hi, i've been using DataKinds for a while and there seems to be a
recurring annoyance that could be possibly eliminated with a language
extension. It goes something like this:
data Tuple (l :: [*]) where
Unit :: Tuple '[]
Comma :: a - Tuple as - Tuple (a ': as)
data Proxy k = Proxy
class
Hi,
This has been discussed before:
http://haskell.1045720.n5.nabble.com/Data-Kinds-and-superfluous-in-my-opinion-constraints-contexts-td5689436.html
Feel free to open a feature request for this. I think it's something we
should consider
addressing, but at the moment it's not immediately clear
