On Tue, Dec 11, 2012 at 9:31 PM, dag.odenh...@gmail.com
wrote:
> The practice seems to be to not export it, but maybe it would be a better
> practice to export it. That way it can work without DefaultSignatures too,
> and if you use the generic-deriving package it could work with zero
> extensions
Hi Johan,
The error message is not ideal, but it does say that adding a Generic (Foo
a)
instance might solve the problem.
I generally do not export classes like GHashable because they are closed;
users
should never need to provide more instances themselves. Also, exporting the
class
won't make th
Hi,
I noticed that you're not required to export the types mentioned in
the default method signature. For example, you could have:
default hashWithSalt :: (Generic a, GHashable (Rep a)) => Int -> a -> Int
hashWithSalt salt = ghashWithSalt salt . from
and not export the GHashable class. H
