Yes, sorry about that. We'll add them shortly. (It's nice to know that someone is using this stuff!)
Simon | -----Original Message----- | From: [EMAIL PROTECTED] [mailto:glasgow-haskell-users- | [EMAIL PROTECTED] On Behalf Of Abraham Egnor | Sent: 26 February 2004 22:18 | To: MR K P SCHUPKE | Cc: [EMAIL PROTECTED] | Subject: Re: Generics... no Tuples > 2 either... | | I've been frustrated by the same lack of instances; as a stopgap, here's | one for a three-tuple. The pattern is pretty clear and can easily be | extended to whatever size you'd like. | | tupCon = mkConstr 1 "(,,)" Prefix | | instance (Data a, Data b, Data c) => Data (a, b ,c) where | gfoldl k z (a, b, c) = ((z (,,) `k` a) `k` b) `k` c | toConstr _ = tupCon | fromConstr _ = (undefined, undefined, undefined) | dataTypeOf _ = mkDataType [tupCon] | | MR K P SCHUPKE <[EMAIL PROTECTED]> writes: | > | >Any chance of Data instances for tuples of size | >greater than 2... One of the nice things about generics is | >you can use them by deriving Data on your datatypes - of | >course this doesn't work if you all of a sudden have to | >put a load of boiler-plate in just to use tuples... | > | > Regards, | > Keean Schupke | >_______________________________________________ | >Glasgow-haskell-users mailing list | >[EMAIL PROTECTED] | >http://www.haskell.org/mailman/listinfo/glasgow-haskell-users | > | | | | _______________________________________________ | Glasgow-haskell-users mailing list | [EMAIL PROTECTED] | http://www.haskell.org/mailman/listinfo/glasgow-haskell-users _______________________________________________ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users