Hello John, Thursday, October 19, 2006, 11:21:37 PM, you wrote:
I had this code that worked in GHC 6.4:
type CommandHandler = FTPServer -> String -> IO Bool type Command = (String, (CommandHandler, (String, String)))
isnt' it better in such cases use the new datatype? data Command = Command String CommandHandler String String
After discussing it with Ian Lynagh, his conclusion was that the problem is that Data.Tuple was not compiled with overlapping instances support, and that it probably ought to be. He asked me to post here to see if everyone else felt the same way.
the problem will arrive with any 'base' type constructor used in such way - [], maybe, either -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com