22 Jun
2010
22 Jun
'10
1:19 p.m.
José,
2010/6/22 José Pedro Magalhães
It is a known problem---multirec does not work with GHC 6.12. You have to use 6.10.4.
An alternative is not to use the Template Haskell stuff and provide explicit type signatures expanding the PF type family in the from/to functions...
Thanks for the information. Providing my own PF type families is indeed what I've been doing succesfully. Is this a fundamental problem, or is there hope for a solution in a future version? Thanks Dominique