Yes it does. Thanks. For the sake of consistency, I'd rather even have
separate functions with funny-looking types than hidden magic. That
is, we could hypothetically have
undefined# :: forall (a :: #) . a
error# :: forall (a :: #) . String - a
There's no mechanism in Haskell to create things
If I define
{-# LANGUAGE MagicHash #-}
g :: Int# - Int
g 3# = 3
myUndefined = undefined
then this gives a sensible type error about a kind mismatch:
usual :: Int
usual = g myUndefined
but this, oddly enough, compiles:
peculiar :: Int
peculiar = g undefined
GHCi and the definition in
On Feb 1, 2015, at 2:07 PM, Adam Gundry a...@well-typed.com wrote:
(There is a plan to get rid of this subkinding in favour of normal
polymorphism, but it hasn't been implemented yet. See
https://ghc.haskell.org/trac/ghc/wiki/NoSubKinds for more details.)
The NoSubKinds plan *is*
