Simon,
Regarding distinguishing between type indices and parameters, you
suggested:
type family T3 f !e :: * -- The ! indicates a type parameter
(not
an index)
I'd rather have indices, rather than parameters, explicated by mean of
syntax. This seems more consistent with
Simon,
type family T3 {|f|} e :: *
Indeed. But do you want to use that syntax for class parameters
too? That would be a big change
class C {|a|} where
Well... That would be the most consistent then. But... it looks weird.
And it breaks code, of course. One could argue
Peter,
I've run into a bug that looks to be the same as the one described
here:
http://hackage.haskell.org/trac/ghc/ticket/1897
It does not seem like a bug, although the type-error message may be a
bit confusing as is the fact that GHC happily infers a type for the
signature-less
My apologies for the duplicated ticket; I ran into a database lock...
On Jun 5, 2007, at 8:45 AM, GHC wrote:
#1412: Typo in type error for lazy patterns
--
+-
Reporter: [EMAIL PROTECTED] | Owner:
Christian,
This did the trick for me when I built Happy (just yesterday):
LALR.lhs: change line 24 from
import Data.Array hiding (bounds)
into
import Data.Array
ProduceCode.lhs: change line 31 from
marray_indices a = Data.Array.MArray.indices a
into
marray_indices a = range
Simon,
Laszlo presented some code:
Consider the following code fragment:
data Colour = Red | Black | Blue deriving (Show, Bounded)
instance Enum Colour where
...
and then remarked:
Notice that there is no deriving Enum (which would be an error
according to the Report)
You asked:
Why
