Ryan Ingram wrote:
[EMAIL PROTECTED] is better for this type of question. Follow-up is set
to it.
Here's a test case for the problem I'm having; I'm using runhaskell from
ghc v6.6.
Problem #1) Without -fallow-undecidable-instances, I get the following
error:
Constraint is no smaller
Maybe this is not what you want, but you can also put the 'convl'
function in the 'ConvertToInt' class.
class ConvertToInt a where
conv :: a -> Int
convl :: [a] -> [Int]
With this approach you don't need any language extension.
regards,
Bas van Dijk
On 5/11/07, Ryan Ingram <[EMAIL PROTEC
Add: -fallow-overlapping-instances to your OPTIONS pragma and read
about overlapping instances in the GHC User Guide:
http://www.haskell.org/ghc/docs/latest/html/users_guide/type-extensions.html#instance-overlap
regards,
Bas van Dijk
On 5/11/07, Ryan Ingram <[EMAIL PROTECTED]> wrote:
Here's a
Here's a test case for the problem I'm having; I'm using runhaskell from ghc
v6.6.
Problem #1) Without -fallow-undecidable-instances, I get the following
error:
Constraint is no smaller than the instance head
in the constraint: ConvertToInt a
(Use -fallow-undecidable-instances to permi
