Brian Hulley wrote:
Is there a reason for using instead of
[exists a. Resource a=a]
?
Only that = looks like a function arrow, looks like a tuple. I stole
this notation from an unpublished paper by SimonPJ et al on adding
existential quantification to Haskell. I'm not especially
Matthias Fischmann wrote:
now i want to create a list of a type similar to
[r1, r2, r3] :: (Resource a) = [a]
but with r1 being pizza, r2 being crude oil, and so on.
The type you actually want here is [exists a. (Resource a) a], but no
Haskell implementation supports that.
data Rs =
Matthias Fischmann wrote:
On Thu, Mar 16, 2006 at 12:40:00PM +, Chris Kuklewicz wrote:
(Why isn't it resourceName :: String ?)
when i am trying this, ghc complains that the type of resourceName
doesn't have any occurrance of 'a', and i feel that it must be harder
for the type engine to
