You don't need to derive ToSElem -- you get the instance for free if you derive Data. Import GenericWithClass to get the instance for Data from syb-with-class, and import GenericStandard for use with Data from the vanilla syb that comes with GHC. Cheers, Sterl. 2009/3/23 Kemps-Benedix Torsten :

Hello all,

I’m trying to use the generic capabilities of HSTringTemplate. The documentation claims that the package is able to automatically generate instances of ToSElem if syb-with-class is installed but gives no further details. I installed syb-with-class and then installed HSTringTemplate with additional configure parameter syb-with-class=True. But when I import Text.StringTemplate.GenericWithClass and then try deriving ToSElem or $(derive ToSElem), I just get an error like “Can't make a derived instance of `ToSElem …”.

Any suggestions or pointer to further docs?

Kind regards

Torsten

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